Conveyor system and method for transporting of goods items

1. A conveyor system for the transporting of goods items, comprising

at least one first, or small, transport container having a first length and a first width, which is smaller than the first length,

at least one second, or large, transport container having a second length and a second width, which is smaller than the second length, where the second length is greater than the first length and the second width may be greater than the first width,

one or more transport units, each of which comprises a load carrying means for accommodating a transport container, the transport units being movable along a conveyor track in or opposite to a direction of conveying,

at least one discharge facility for discharging an empty transport container or one laden with a goods item onto the load carrying means of a transport unit,

at least one retrieval facility for retrieving an empty transport container or one laden with a goods item from a load carrying means of a transport unit, where at least two of the first containers may in each case be accommodated next to one another on a load carrying means of a transport unit with their longitudinal extension transverse to the direction of conveying, or one second container may in each case be accommodated on a load carrying means of a transport unit with its length extension in the direction of conveying, and where each transport unit is provided with a first retaining means and each transport container is provided with a second retaining means, the first retaining means being designed to interact either with the second retaining means of one or more first transport containers accommodated transversely to the direction of conveying, or with the second retaining means of a second transport container accommodated in the direction of conveying, and to restrict movement of a transport container in or transverse to the direction of conveying relative to the load carrying means in a predetermined measure, and

wherein the first retaining means and the second retaining means are designed in such a way that either several, and in particular two, transversely oriented small transport containers or one longitudinally oriented large transport container can be accommodated on the load carrying means, so that the first retaining means interacts interlockingly with the second retaining means.

2. The conveyor system in accordance with claim 1 , wherein the first retaining means is designed to interact interlockingly with the second retaining means.

3. The conveyor system in accordance with claim 1 , wherein the first retaining means comprises first retaining or catch elements projecting vertically upwards from the load carrying means.

4. The conveyor system in accordance with claim 1 , wherein the second retaining means is formed complementarily to the first retaining means and may comprise second retaining elements formed complementarily to the first retaining elements.

5. The conveyor system in accordance with claim 1 , wherein the discharge facility comprises a pair of parallel, spaced first feed tracks, disposed opposite each other and above the conveyor track, on which small transport containers oriented transversely to the direction of conveying can be conveyed in or opposite to the direction of conveying and can at an end section of the first feed tracks be discharged onto a transport unit travelling thereunder, and a pair of parallel, spaced second feed tracks, disposed opposite each other below and between the first feed tracks and above the conveyor track, on which large transport containers oriented in the direction of conveying can be conveyed in or opposite to the direction of conveying and can at the end sections be discharged onto a transport unit travelling thereunder.

6. The conveyor system in accordance with claim 5 , wherein the second feed tracks are at a transition point in a transitional section brought to a conveying height identical to that of the first feed tracks.

7. The conveyor system in accordance with claim 5 , wherein laterally outside the first feed tracks guide devices are disposed for transversely oriented small transport containers, the distance between which is greater than the first length.

8. The conveyor system in accordance with claim 5 , wherein inside or between the second feed tracks guide devices are disposed for large transport containers oriented in the direction of conveying, the distance between which is greater than a second width of the larger transport containers, the second width may be greater than the first width.

9. The conveyor system in accordance with claim 1 , wherein the retrieval facility comprises a pair of parallel, spaced first feed tracks, disposed opposite each other and above the conveyor track, on which small transport containers oriented transversely to the direction of conveying can be conveyed in or opposite to the direction of conveying and can at an end section of the first feed tracks be retrieved from a transport unit travelling thereunder, and a pair of parallel, spaced second feed tracks, disposed opposite each other below and between the first feed tracks and above the conveyor track, on which large transport containers oriented in the direction of conveying can be conveyed in or opposite to the direction of conveying and can at the end sections be retrieved from a transport unit travelling thereunder.

10. The conveyor system in accordance with claim 1 , wherein the conveyor system includes at least one first transport container and at least one second transport container.

11. A conveyor system for the transporting of goods items, comprising

at least one first, or small, transport container having a first length and a first width, which is smaller than the first length,

at least one second, or large, transport container having a second length and a second width, which is smaller than the second length, where the second length is greater than the first length and the second width may be greater than the first width,

one or more transport units, each of which comprises a load carrying means for accommodating a transport container, the transport units being movable along a conveyor track in or opposite to a direction of conveying,

at least one discharge facility for discharging an empty transport container or one laden with a goods item onto the load carrying means of a transport unit,

at least one retrieval facility for retrieving an empty transport container or one laden with a goods item from a load carrying means of a transport unit, where at least two of the first containers may in each case be accommodated next to one another on a load carrying means of a transport unit with their longitudinal extension transverse to the direction of conveying, or one second container may in each case be accommodated on a load carrying means of a transport unit with its length extension in the direction of conveying, and where each transport unit is provided with a first retaining means and each transport container is provided with a second retaining means, the first retaining means being designed to interact either with the second retaining means of one or more first transport containers accommodated transversely to the direction of conveying, or with the second retaining means of a second transport container accommodated in the direction of conveying, and to restrict movement of a transport container in or transverse to the direction of conveying relative to the load carrying means in a predetermined measure, and wherein the first retaining means comprises side cheeks running in the direction of conveying, the clear distance between which may be greater than the first length or the second width, whichever is the greater of these two measures, and/or boundary walls running transversely to the direction of conveying, the clear distance between which may be greater than a multiple of, and in particular double, the first width or greater than the second length, whichever is the greater of these two measures.

12. A method for the transporting of goods items using a conveyor system comprising:

moving one or more transport units, each of which comprises a load carrying means for accommodating a transport container, the transport units being movable along a conveyor track in or opposite to a direction of conveying, with at least one discharge facility for discharging an empty transport container or one laden with a goods item onto the load carrying means of a transport unit, and at least one retrieval facility for retrieving an empty transport container or one laden with a goods item from a load carrying means of a transport unit, where the transport containers comprise first, or small, transport containers with a first length and a first width, which is smaller than the first length, and large, or second transport containers with a second length and a second width, which is smaller than the second length, where the second length is greater than the first length and the second width may be greater than the first width, where at least two of the first containers may in each case be accommodated next to one another on a load carrying means of a transport unit with their longitudinal extension transverse to the direction of conveying, or one second container may in each case be accommodated on a load carrying means of a transport unit with its length extension in the direction of conveying, and where each transport unit is provided with a first retaining means and each transport container is provided with a second retaining means, the first retaining means being designed to interact with the second retaining means of one or more first transport containers accommodated transversely to the direction of conveying, or with the second retaining means of a second transport container accommodated in the direction of conveying, and to restrict movement of a transport container in or transverse to the direction of conveying relative to the load carrying means in a predetermined measure;

discharging at a discharge facility at least a first transport container transversely oriented to the direction of conveying onto a load carrying means of a transport unit, or a second transport container oriented in the direction of conveying onto the load carrying means of the transport unit; and

driving the transport unit to a retrieval facility where the at least one transport container is retrieved, wherein the first retaining means and the second retaining means are designed in such a way that either several, and in particular two, transversely oriented small transport containers or one longitudinally oriented large transport container can be accommodated on the load carrying means, so that the first retaining means interacts interlockingly with the second retaining means.

13. The method in accordance with claim 12 , comprising:

discharging at least the first transport container onto a load carrying means of a first transport unit;

discharging the second transport container onto a load carrying means of a second transport unit; and

driving the first and second transport units to the retrieval facility where the first and second transport containers are retrieved.

14. The method in accordance with claim 12 , wherein, depending on a permissible laden weight of a transport unit loaded with at least one transport container, in order to avoid exceeding the weight limit, only one small transport container is discharged onto a transport unit, in which case the weight of the goods items which are to be loaded or have been loaded onto the small transport containers, or the weight of the small transport containers loaded with goods items, can be determined prior to discharge onto a transport unit.

15. A method for the transporting of goods items using a conveyor system comprising:

moving one or more transport units, each of which comprises a load carrying means for accommodating a transport container, the transport units being movable along a conveyor track in or opposite to a direction of conveying, with at least one discharge facility for discharging an empty transport container or one laden with a goods item onto the load carrying means of a transport unit, and at least one retrieval facility for retrieving an empty transport container or one laden with a goods item from a load carrying means of a transport unit, where the transport containers comprise first, or small, transport containers with a first length and a first width, which is smaller than the first length, and large, or second transport containers with a second length and a second width, which is smaller than the second length, where the second length is greater than the first length and the second width may be greater than the first width, where at least two of the first containers may in each case be accommodated next to one another on a load carrying means of a transport unit with their longitudinal extension transverse to the direction of conveying, or one second container may in each case be accommodated on a load carrying means of a transport unit with its length extension in the direction of conveying, and where each transport unit is provided with a first retaining means and each transport container is provided with a second retaining means, the first retaining means being designed to interact with the second retaining means of one or more first transport containers accommodated transversely to the direction of conveying, or with the second retaining means of a second transport container accommodated in the direction of conveying, and to restrict movement of a transport container in or transverse to the direction of conveying relative to the load carrying means in a predetermined measure;

discharging at a discharge facility at least a first transport container transversely oriented to the direction of conveying onto a load carrying means of a transport unit, or a second transport container oriented in the direction of conveying onto the load carrying means of the transport unit;

driving the transport unit to a retrieval facility where the at least one transport container is retrieved; and

wherein the first retaining means comprises side cheeks running in the direction of conveying, the clear distance between which may be greater than the first length or the second width, whichever is the greater of these two measures, and/or boundary walls running transversely to the direction of conveying, the clear distance between which may be greater than a multiple of, and in particular double, the first width or greater than the second length, whichever is the greater of these two measures.