DK178576B1 - Lifting System - Google Patents

Abstract

A lifting system (2) configured to transport an object (18) having one or more support structures (54, 54', 54", 54'") is disclosed. The lifting system (2) comprises a trolley (20) provided with a handle (22) and a frame (40), onto which frame (40) a number of transport members (26, 26') are attached. The trolley (20) comprises receiving means (24, 24', 30, 30') configured to receive the support structures (54, 54', 54", 54"'). The lifting system (2) comprises a cart (4) provided with a plurality of transport members (6, 6', 6", 6"') and a support member (10) configured to fixedly receive the support structure (54, 54', 54", 54"').

Description

Lifting System Field of invention

The present invention generally relates to a transportation device for handling objects comprising rod-shaped support members. The invention more particularly relates to a lifting device for handling large objects such as trampolines and table benches.

Prior art

Trolleys are widely used to transport items within different environments. The stair-climber-type trolley is fitted with rotating wheels, castors or tracks and is configured to be pushed or pulled up or down steps or a stairway. Trolleys are, in general, used to vertically displace an item in order to lift the item free of ground contact. Hereafter, the trolley (often fitted with rotating wheels, castors or tracks) can also be used to move the item e.g. horizontally.

Most trolleys, however, require that the item being lifted is kept fixed to the trolley by hands, by fixing means or by gravity (e.g. when tilting the trolley in order to make the item abut the vertical frame components of the trolley).

E.g. US 2014/0125023 A1 describes a mobile support system for supporting a concrete pouring hose having four large-diameter castors, a frame above the castors and a hand hold arrange around the perimeter of the support system above the castors and below the support. The support system disclosed is suitable for providing stability for a flexible hose in three dimensions, while allowing mobility of the hose and preventing collapse of the hose during concrete pumping and distribution.

GB 2 457 597 A disclose a hand truck with a frame, wheels, an active identifier and a power source. The hand truck is suitable for transporting objects in reduced lighting conditions. The hand truck disclosed is suitable for transporting various objects, however, these objects are not fixed during transport as the hand truck does not include fixing means.

US 2013/0187532 A1 discloses a dolly comprising a base having a pair of spaced apart side walls and an end wall connecting the side walls and casters supporting the side walls and end walls. The dolly further includes a handle having a pair of vertical portions extending upward from the base to a handle portion. The dolly may consist of a first dolly with a handle and a second dolly without a handle. The dollies may be connected using a spreader bar. The end and side walls provides support to the object being transported, however, there is a risk of the object hitting the walls and handle during transportation, thus, resulting in damaging either the dolly or the object transported.

WO 2007/073729 A1 discloses a transportation cart having a handle and at least two wheels and fork-formed means for receiving the object to be transported. The cart has a plate perpendicularly to the fork-formed means thereby supporting the object to be transported. However, the object may hit the plate, thus, inducing the risk of damaging either the transportation cart or the object transported.

Therefore, it would be desirable to have a trolley in which an item can be fixed to the trolley in an easy manner.

Moreover, when it comes to large items such as trampolines, tables, benches and table benches, the prior art trolleys are very difficult to use for the purpose of transporting the items.

Accordingly, there is need for an alternative way of handling large items such as trampolines, tables, benches and table benches.

It is an object of the present invention to provide a lifting and transportation system suitable for handling large items such as trampolines, tables, benches and table benches.

The system may be applied on various types of ground (e.g. a lawn, flagstone, asphalt or soil).

Summary of the invention

The object of the present invention can be achieved by a lifting system as defined in claim 1. Preferred embodiments are defined in the dependent sub claims, explained in the following description and illustrated in the accompanying drawings.

The transportation system according to the invention is a lifting system configured to transport an object having one or more support structures, wherein the transportation system comprises a trolley provided with a handle and a frame, onto which frame a number of transport members are attached, wherein the trolley comprises receiving means configured to receive the support structures. The transportation system comprises a cart provided with a plurality of transport members and a support member configured to fixedly receive the support structures. The transport members of the trolley are mounted closer to the handle than the receiving means. Furthermore, a support arm is attached to an arm member and protrudes therefrom.

Hereby, it is possible tohave a trolley, in which an item can be fixed to the trolley in an easy and user-friendly manner. Moreover, it is possible to provide a transportation system suitable for handling large items such as trampolines, tables, benches, table benches and football goals.

The transportation system according to the invention is a system configured to transport an object having one or more support structures. Such objects may be trampolines, tables, benches, table benches and football goals.

The transportation system comprises a trolley provided with a handle and a frame, onto which frame a number of transport members are attached.

The handle may be of any suitable type, size and geometry. It may be an advantage that the handle is U-shaped.

The trolley comprises receiving means configured to receive the support structure(s).

The transportation system comprises a cart provided with a plurality of transport members (e.g. rotating wheels, castors or runners) and a support member configured to fixedly receive the support structures.

The system may comprise several carts (e.g. three, four or more carts). This may be an advantage if the system is used to transport a very large object e.g. a large trampoline.

By the term "fixedly receive" is meant that the support member restricts the motion of the support structures in at least one horizontal direction. If the support structures are rod-shaped, the support member may restrict the motion of the support structures in directions perpendicular to the longitudinal axis of the support structures.

It may be an advantage that the trolley is configured to lift a support structure and can be vertically displaced to such an extent that the cart according to the invention can be inserted below the support structure, and that the support structure may be lowered vertically until it rests on the cart.

It may be advantageous that the trolley comprises two rotating wheels or castors rotatably attached to the frame. Hereby, it is possible to provide a reliable trolley in a simple way.

The rotating wheels or castors may be attached to a mounting arrangement (e.g. a mounting plate) attached to the frame, or the rotating wheels or castors may be attached directly to the frame.

It may be beneficial that the transport members of the cart are rotating wheels or castors rotatably attached to the frame of the cart.

Hereby, it is possible to provide an easy movable cart.

It may be an advantage that the cart comprises two U-shaped frames each comprising a base portion and two end portions provided at each end of the base portion.

A cart of this construction is simple and reliable.

It may be an advantage that the base portion is a straight, rod-shaped member.

It may be beneficial that a wheel is rotatably attached to each of the four end portions. Hereby, a stable and easy movable cart can be provided.

It may be an advantage that the end portions are L-shaped.

The system may comprise one or more mounting brackets configured to engage with a large object (e.g. a trampoline) in a detachable manner.

It may be advantageous that the cart comprises a support member that is fixed to the two U-shaped frames and extends between these two U-shaped frames, and that the support member comprises a support surface and a first support wall protruding from the support surface, where the support member comprises a second support wall protruding from the support surface.

Hereby, it is possible to provide a reliable and secure support member by simple means.

It may be beneficial that the trolley is provided with an interior receiving opening with a width larger than the outside width of the cart.

Hereby, it is possible to arrange the cart within the interior receiving opening of the trolley. This is of great importance during use of the lifting system. In this way, the trolley can be applied to lift an object and displace the object vertically, whereas the cart can be moved into the interior receiving opening of the trolley. When the cart is arranged properly within the interior receiving opening of the trolley, the trolley can be applied to lower the object until the object rests completely on the cart and no longer rests on the trolley.

The trolley is configured to be able to change the vertical position of the part of the object that rests on the trolley by rotating the trolley about the shafts of the wheels or castors of the trolley.

In practise, the vertical displacement of the object may be accomplished by moving the handle upwards or downwards, since the shafts of the wheels or castors of the trolley function as pivot joints.

The handle may be provided with an insulating layer (e.g. a coating) or a sleeve for providing an improved grip and/or providing thermal insulation.

Hereby, it is possible to use the trolley as a lifting device as the trolley is provided with two lever arms.

It is a major advantage that the trolley is configured to pivot about the shafts of the wheels or castors, and that these shafts are provided in a non-zero distance from the position in which the load is received and maintained within the trolley.

It may be advantageous that the trolley comprises two arm members extending almost perpendicularly to the longitudinal axis of the trolley.

Hereby, it is possible to lift a support structure of an object (e.g. a trampoline) by means of the arm members of the trolley.

A support arm is attached to each arm member and protrudes therefrom. Hereby, it is possible to lift the support structure of an object (e.g. a trampoline) by means of the arm members of the trolley. It is also possible to displace the support structure along the arm member towards its proximal end and let it rest on the support arm(s). Hereby, the object and at least some of its support structures can be mechanically held (kept in place) by the trolley.

It may be an advantage that a stop member is provided at the distal end of the support arm. The stop member may be configured to prevent the support structures from being displaced further towards the proximal end of the support arms, when the support structures are moved towards the proximal end of the support arm(s).

It may be an advantage that the trolley comprises a handle that is detachably attached to the frame of the trolley.

Hereby, it is possible to reduce the size of the trolley e.g. during transport and/or storage of the trolley.

Description of the Drawings

The invention will become more fully understood from the detailed description given herein below. The accompanying drawings are given by way of illustration only, and thus, they are not limitative of the present invention. In the accompanying drawings:

Fig. 1 a) shows a side view of a cart of a lifting system according to the invention;

Fig. 1 b) shows a perspective view of the cart shown in Fig. 1 a);

Fig. 1 c) shows an end view of the cart shown in Fig. 1 a) and in

Fig. 1 b);

Fig. 1 d) shows a top view of the cart shown in Fig. 1 a), Fig. 1 b) and Fig. 1 c);

Fig. 2 a) shows a perspective view of a trolley of a lifting system according to the invention;

Fig. 2 b) shows a perspective view of the trolley shown in Fig. 2 a) in a state in which the trolley is loaded;

Fig. 2 c) shows a top view of a lifting system according to the invention;

Fig. 2 d) shows a close-up view of the right, bottom portion of the trolley shown in Fig. 2 a);

Fig. 3 schematically shows a perspective view of a lifting system according to the invention applied to transport a large object;

Fig. 4 shows a schematic view of a lifting system according to the invention applied to transport a trampoline;

Fig. 5 a) shows a top view of a trolley according to the invention;

Fig. 5 b) shows a side view of the trolley shown in Fig. 5 a);

Fig. 5 c) shows a front view of the trolley shown in Fig. 5 a) and in

Fig. 5 b) and

Fig. 6 shows a front view of a system comprising a cart that is movably attached to a trolley.

Detailed description of the invention

Referring now in detail to the drawings for the purpose of illustrating preferred embodiments of the present invention, a cart 4 of a transportation system 2 according to the invention is illustrated in Fig.

1.

Fig. 1 a) illustrates a side view of a cart 4 of a transportation system according to the invention. The cart 4 comprises a U-shaped base structure having a central, elongated, rod-shaped base portion 8 extending between two arced (basically L-shaped) end portions 42, 42'.

A first wheel 6' is rotatably attached to the first end portion 42, whereas a second wheel 6 is rotatably attached to the second end portion 42'. A support member 10 is attached to the upper portion of the central area of the base portion 8. The support member 10 comprises a plane plateshaped support surface 14 extending between two adjacent plane plateshaped wall members 12, 12'. Accordingly, the support member 10 constitutes a cavity configured to receive an object (see Fig. 3).

The center of gravity CG of the cart 4 is indicated below the base portion 8. It can be seen that the center line CL (indicated by a dotted line) of the cart 4 intersects the center of gravity C. Since the center of gravity CG of the cart 4 is provided between the wheels 6, 6', the cart 4 will remain stable when it is loaded (an object is received by the support member 10).

Fig. 1 b) illustrates a perspective view of the cart 4 illustrated in Fig. 1 a). The cart 4 comprises two parallel, U-shaped base structures each having a central, elongated, rod-shaped base portion 8, 8' extending between two arced end portions 42, 42', 44, 44'. Two wheels 6, 6', are rotatably attached to the distal end of the end portions 42, 42' of the first U-shaped base structure. Likewise, two wheels 6", 6'", are rotatably attached to the distal end of the end portions 44, 44' of the second U-shaped base structure.

A U-shaped support member 10 is attached to and extends between the first U-shaped base structure and the second U-shaped base structure.

The wheels 6, 6', 6", 6'" are rotatably attached to the distal portions of the end portions 42, 42', 44, 44' by means of an externally threaded headed fastener (a bolt or a threaded shaft extending from the hub of the wheel 6, 6', 6", 6'"), which is used in conjunction with a nut 16. The nuts 16 are provided at the inside area of the cart 4, while the hubs of the wheel 6, 6', 6", 6'" are provided at the periphery (outer area) of the cart 4.

Fig. 1 c) illustrates an end view of the cart 4 shown in Fig. 1 a) and in Fig. 1 b). The cart 4 comprises a U-shaped support member 10 extending between a first rod-shaped base portion 8 and a second rodshaped base portion 8'. The vertical axis Z of the cart 4 is indicated with a dotted arrow.

The cart 4 comprises a wheel 6 rotatably fixed to a first end portion 42 provided at the end of the first rod-shaped base portion 8. The cart 4 moreover comprises another wheel 6'" rotatably fixed to a second end portion 44 provided at the end of the second rod-shaped base portion 8'. The wheels 6, 6"' are securely fastened to the portions 42, 44 by means of nuts 16 attached to an externally threaded headed fastener.

Fig. 1 d) illustrates a top view of the cart 4 shown in Fig. 1 a), Fig. 1 b) and Fig. 1 c). The cart 4 is symmetric about the sagittal plane (the plane spanned by the longitudinal axis X and vertical axis Z). Additionally, the cart 4 is symmetric about the frontal plane (the plane spanned by the frontal/lateral axis Y and vertical axis Z).

The cart 4 comprises a first wheel 6' rotatably attached to a first end portion 42 provided at the end of the first rod-shaped base portion 8. The cart 4 moreover comprises a second wheel 6"' rotatably fixed to the end portion 42' provided at the opposite end of the first rod-shaped base portion 8. Likewise, the cart 4 comprises a third wheel 6" rotatably fixed to the end portion 44 provided at the end of the second rodshaped base portion 8' and a fourth wheel 6'" rotatably fixed to the end portion 44' provided at the opposite end of the second rod-shaped base portion 8'.

It can be seen that all the wheels 6, 6', 6", 6'" are securely fastened to the portions 42, 42', 44, 44' by means of nuts 16 attached to an externally threaded headed fastener.

A U-shaped support member 10 extends between the first U-shaped base structure and the second U-shaped base structure. The U-shaped support member 10 is attached to the first rod-shaped base portion 8 and to the second rod-shaped base portion 8'.

Fig. 2 a) illustrates a perspective view of a trolley 20 of a transportation system according to the invention. The trolley 20 comprises a U-shaped handle 22 attached to a frame 40. The frame 40 comprises two parallel rod-shaped frame members 34, 34' and a cross member 46 formed as a transverse, rod-shaped member which adds support to the frame 40. Two plane plate members 36, 36' are attached to the cross member 46.

A first wheel 26 is rotatably attached to the bottom portion of the frame 40. Similarly, a second wheel 26' is rotatably attached to the opposite side of the bottom portion of the frame 40. The wheels 26, 26' are attached by means of nuts 32.

At the distal end of the first frame member 34, a plane plate-shaped arm member 24 is provided. A support structure 28 extends from the arm member 24 to the first frame member 34 and supports the arm member 24 (providing additional mechanical strength to it). A support arm 30 protrudes from the arm member 24 towards the first frame member 34. A stop member 48 is provided at the distal end of the support arm 30. The stop member 48 prevents an object from being displaced further along the support arm 30 when the object abuts the stop member 48 (see Fig. 2 b).

The angle a between the support arm 30 and the arm member 24 is indicated in Fig. 2 a). The angle a between the support arm 30 and the arm member 24 may be about 90 degrees.

Likewise, at the distal end of the second frame member 34' a plane plate-shaped arm member 24' is arranged. A support structure 28' is attached to the arm member 24' and to the second frame member 34'. The support structure 28' supports the arm member 24' by giving additional mechanical strength to it.

A support arm 30' protrudes from the arm member 24' towards the second frame member 34', and a stop member 48' is arranged at the distal end of the support arm 30'. The stop member 48' is configured to prevent an object from being displaced further along the support arm 30' when the object abuts the stop member 48' as illustrated in Fig. 2 b).

Fig. 2 b) illustrates a perspective view of the trolley 20 shown in Fig. 2 a) in a state in which the trolley 20 is loaded. The trolley 20 is carrying a pipe 18.It could however carry any object with a rod-like or pipe-like supporting member e.g. a trampoline, a table, a bench or a table bench.

The trolley 20 comprises a U-shaped handle 22 attached to a frame 40 comprising a rod-shaped cross member 46 extending between two parallel rod-shaped frame members 34, 34'.

The pipe 18 rests on the arm members 24, 24' and support arms 30, 30 (see Fig. 2 a). The movement of the pipe 18 is restricted by the stop members 48, 48' (see Fig. 2 a) and by the arm members 24, 24'.

Fig. 2 c) illustrates a transportation system 2 according to the invention. The transportation system 2 comprises a trolley 20 corresponding to the one shown in Fig. 2 a) and a cart 4 corresponding to the one shown in Fig. 1.

The trolley 20 comprises a U-shaped handle 22 attached to a frame 40 comprising a rod-shaped cross member 46 extending between two parallel rod-shaped frame members 34, 34'. The frame 40 comprises a cross member 46 connecting the parallel frame members 34, 34'. The cross member 46 extends perpendicularly to both frame members 34, 34'. The cross member 46 is equipped with two symmetrically arranged plate members 36, 36'. These plate members 36, 36' are configured to support the cart 4 while being hung onto the cross member 46 of the trolley 20.

The trolley 20 comprises a first wheel 26 rotatably attached to the frame 40. The trolley 20 comprises a second wheel 26' that is also rotatably attached to the frame 40. In the distal ends of each of the two frame members 34, 34', an arm member 24, 24' is provided. A support arm 30, 30' extends from each arm member 24, 24'.

It can be seen that the wheels 26, 26' are provided in a non-zero distance d from the stop members 48, 48' (see Fig. 2 a) and Fig. 2 d)). This means that the trolley 20 is capable of lifting a load by displacing the load vertically when the handle 22 is moved vertically downwards. The trolley is configured to pivot about the shafts of the wheels 26, 26' as the shafts are provided in a non-zero distance d from the position in which the load is received and maintained within the trolley 20.

The distance l_2 between the right side parts and the left side parts of the frame 40 is indicated. Likewise, the distance Li between the left and right extremities of the cart 4 is indicated in Fig. 2 c). It can be seen that the trolley 20 is provided with an interior receiving opening 56 having a width L2 significantly larger than the outside width Li of the cart 4.

Fig. 2 d) illustrates a close-up view of the right bottom portion of the trolley 20 shown in Fig. 2 a), Fig. 2 b) and in Fig. 2 c). A stop member 48 is provided in the distal end of the support arm 30. The angle a between the stop member 48 and the support arm 30 is indicated in Fig. 2 d).

Fig. 3 schematically shows a perspective view of a transportation system 2 according to the invention. The transportation system 2 is loaded with a large object 18. Accordingly, the transportation system 2 is applied to transport the large object 18. The object 18 has rodshaped support structures 54, 54' configured to rest against the ground.

The object 18 has a first rod-shaped support structure 54 that is received by the support member 10 of the cart 4. The support walls 12, 12' ensure that the support structure 54 is maintained within the support member 10 of the cart 4 during transport of the object 18.

The transportation system 2 comprises a trolley 20 according to the invention. The trolley 20 has received the support structure 54' of the object 18. The support structure 54' of the object 18 rests on the support arms 30, 30', and the stop members 48, 48' and the arm members 24, 24' keep the support structure 54' of the object 18 resting on the support arms 30, 30'.

Transportation of the object 18 can be carried out by means of the transportation system 2 simply by gripping the handle 22 of the trolley 20 and pulling the trolley 20.

Fig. 4 illustrates a schematic view of a transportation system 2 according to the invention applied to transport a trampoline 18. The trampoline 18 comprises four support structures 54, 54', 54", 54'" evenly distributed along the periphery of the circular frame of the trampoline 18. The support structures 54, 54', 54", 54'" are configured to rest against the ground.

In Fig. 4, however, the first support structure 54 and the second support structure 54' are received by the trolley 20 of the transportation system 2 and by the cart 4 of the transporation system 2, respectively.

Thus, the transporation system 2 is ready to be applied to transport the trampoline 18. Transport of the trampoline may include displacing the trampoline horizontally and vertically e.g. along a lawn in a private garden.

Fig. 5 a) illustrates a top view of a trolley 20 according to the invention. The trolley 20 comprises a fist wheel 26 rotatably mounted on a plane plate-shaped mounting plate 52 that is mechanically fixed to the frame 40 as shown in Fig. 5 b) and in Fig. 5c). Likewise, the trolley 20 comprises a second wheel 26' rotatably mounted on a plane plateshaped mounting plate 52' mechanically fixed to the frame 40 as shown in Fig. 5 b) and in Fig. 5c).

The wheels 26, 26' are fixed to the plate members 52, 52' by means of nuts 32, 32' screwed to the distal end of the headed externally-threaded fasteners (bolts or threaded shafts) extending from the hubs of the wheels 26, 26' and through corresponding through bores (not shown) provided in the plate members 52, 52'.

The trolley 20 comprises a first plate-shaped arm member 24 and a second plate-shaped arm member 24' displaced from the first plateshaped arm member 24. A first support arm 30 extends from the first plate-shaped arm member 24, and a second support arm 30' extends from the second plate-shaped arm member 24'.

A Cartesian coordinate system with a first (horizontal) axis X, a second (horizontal) axis Y and a third (vertical) axis Z is indicated in Fig. 5 a). The axes X, Y, Z are indicated with dotted arrows.

Fig. 5 b) illustrates a side view of the trolley 20 shown in Fig. 5 a). The trolley 20 comprises a wheel 26 rotatably attached to the frame 40 of the trolley 20. The trolley 20 comprises a handle 22 extending from the frame 40. The handle 22 is detachably attached to the frame 40 of the trolley 20 by means of joints 38.

Fig. 5 c) shows a front view of the trolley shown in Fig. 5 a) and in Fig. 5 b). The trolley 20 comprises a U-shaped handle 22 detachably attached to a H-shaped frame 40 by means of a first joint 38 and a second joint 38'.

The frame 40 comprises a cross member 46 formed as a transverse rod-shaped member which adds support to the frame 40. The cross member 46 is provided with a first plate member 36 and a second plate member 36'.

A first wheel 26 and a second wheel 26' are rotatably attached to the frame 40. The vertical axis Z' shown in Fig. 5 a) is also shown in Fig. 5 c).

Fig. 6 illustrates a transportation system 2 according to the invention. The transportation system 2 comprises a trolley 20 corresponding to the one shown in Fig. 2 a) and a cart 4 corresponding to the one shown in Fig. 1. The cart 4 is hanging on the trolley 20.

More particularly, the two uppermost wheels 6', 6" of the cart 4 are resting against the cross member 46 of the trolley 20. The base portions 8, 8' of the cart 4 are supported by the plate members 36, 36' of the trolley 20.

The cart 4 can easily be attached to the trolley 20 like illustrated in Fig. 6. Moreover, it is easy and fast to release the cart 4 when use of the cart 4 is required.

List of reference numerals 2 Transporation system 4 Cart 6, 6', 6", 6'" Wheel 8, 8' Base portion 10 Support member 12, 12' Support wall 14 Support surface 16 Fastening member 18 Object 20 Trolley 22 Handle 24, 24' Arm member 26, 26' Wheel 28, 28' Support structure 30, 30' Support arm 32 Fastening member 34, 34' Frame member 36, 36' Plate member 38, 38' Joint 40 Frame 42, 42' End portion 44, 44' End portion 46 Cross member 48, 48 Stop member 50 Rod 52, 52' Mounting plate 54, 54', 54", 54'" Support structure 56 Receiving opening a Angle CG Center of gravity CL Center line X, X', Y, Y', Z, Z' Axis

Li, Li, d Distance

Claims (9)

A conveyor system (2) adapted to transport an article (18) comprising one or more load-bearing structures (54, 54 ', 54 ", 54'"), wherein the lifting system (2) comprises a bag truck (20) , which is provided with a handle (22) and a frame (40), to which the frame (40) is attached a plurality of transport units (26, 26 '), the bag truck (20) comprising receiving units (24, 24', 30 , 30 ') which is adapted to receive the supporting structures (54, 54', 54 ", 54 '"), characterized in that the lifting system (2) comprises a carriage (4) equipped with several transport units ( 6, 6 ', 6 ", 6'") and a supporting element (10) adapted to receive and retain the supporting structures (54, 54 ', 54 ", 54'"), and in that the transport units ( 26, 26 ') of the bag carrier (20) is mounted closer to the handle (22) than the receiving units (24, 24', 30, 30 '), where a support arm (30, 30') is attached to an arm unit (24, 24). ') and project from there. A transport system according to claim 1, wherein a stop unit (48) is provided at the distal end of the support arm (30). Transport system (2) according to claim 1 or 2, characterized in that the baggage carriage (20) comprises two rotating wheels or furniture wheels (26, 26 ') which are rotatably fixed to the frame (40). Transport system (2) according to any one of the preceding claims, characterized in that the transport units (6, 6 ', 6 ", 6'") of the carriage (4) are rotating wheels or furniture wheels (6, 6 ', 6 ", 6" ") which is rotatably attached to the frame of the carriage (4). Transport system (2) according to one of the preceding claims, characterized in that the carriage (4) comprises two U-shaped frames, each comprising a base part (8, 8 ') and two end pieces (42, 42', 44). 44 ') provided at each end of the base portion (8, 8'). Transport system (2) according to claim 4, characterized in that a wheel (6, 6 ', 6 ", 6'") is rotatably fixed to each of the four end pieces (42, 42 ', 44, 44'). Transport system (2) according to claim 5 or claim 6, characterized in that the carriage (4) comprises a supporting element (10) which is attached to the two U-shaped frames and extends between these two U-shaped frames. and that the supporting member (10) comprises a supporting surface (14) and a first supporting wall (12) projecting from the supporting surface (14), the supporting member (10) comprising a second supporting wall (12 ') projecting from the support surface (14). Transport system (2) according to one of the preceding claims, characterized in that the bag truck (20) is provided with an inner receiving opening (56) whose width (U) is greater than the outside width (Li) of the carriage (4). Transport system (2) according to one of the preceding claims, characterized in that the bag truck (20) comprises two arm units (24, 24 ') which extend perpendicular to the longitudinal axis (Z') of the bag truck (20).