OBJECT OF INVENTION The object of this invention is a crane, installed rigidly and securely to the load space, which is intended for use in vehicles such as transport vans, trucks or trailers, as well as in containers for loading in vehicles or containers in situ in the upper component of the load space in loading or unloading the latter in transferring loads, and which is a horizontal telescopic boom that is adjustable with respect to its length; comprising a fixed telescopic boom and at least one mobile telescopic boom component which is mobile with respect to the fixed telescopic boom; and a load suspension component, i.e. a trolley, which can be moved by means of the supporting apparatus inside the telescopic boom, such as rollers or equivalent apparatus. STATE OF THE ART

In transport vans and trucks, the loading and handling of loads is generally facilitated by a tailgate crane. Their flaw, however, lies in the fact that they are heavy structures placed at the rear of a motor vehicle which reduce the supporting capacity of a vehicle and weaken its driving-related features and characteristics. In addition, in handling heavy loads a pellet jack is required, by which means effective utilization of the load space is awkward and difficult. It is also difficult to find a place for a pellet jack in a fully-loaded vehicle during transport. Particularly with vans, the load space and the vehicle's load-carrying capacity are highly limited indeed.

In publications GB-2202510A, US-4194867, US-5062760 and US-5338147, overhead crane-type load-handling equipment installed on the roof of a truck or van as a

replacement for a rear tail lift has been presented. The equipment presented is, however, also quite complicated, heavy and impractical in operation. The structural height of the equipment is also exceptionally large and, as a result, it decisively reduces the lift height of the load, particularly in the case of transport vans.

AIM OF INVENTION The aim of this invention is to provide a new, more effective crane which does not have the aforementioned drawbacks. CHARACTERISTICS OF INVENTION

It is characteristic of the crane according to the invention that

in connection with the crane's telescopic boom respective to both the fixed and movable component, there is at least one conductor, such as a rail or other corresponding surface, and

the fixed telescopic boom rail bracket surface or other corresponding surface is, in the main, at the same horizontal plane as the rail bracket surface or other corresponding surface of the movable telescopic boom, so that the load suspension component, i.e. the trolley roller, can obtain support from either bracket surface or corresponding surfaces and proceed from the rail or surface to the other one without any essential threshold or point of discontinuity in the movement of the load suspension component, i.e. the trolley, within the telescopic boom. ^■'" > Because the crane according to the invention is a telescopic boom, it is quite simple in structure and low in height, enabling substantial lift height for loads. With the telescopic boom crane according to the invention, the vehicle's load space can be loaded quite effectively and rapidly. In this respect, the driver of the vehicle can independently load and unload the vehicle, regardless of time and place.

EMBODIMENTS OF INVENTION

According to the invention, it is characteristic of one advantageous embodiment of the crane that

- in connection with both telescopic booms in the cra e, there is at least one toothed rack,

the fixed toothed rack of the telescopic boom is mainly at the same horizontal plane as the toothed rack of the movable telescopic boom, and

in the load suspension component, i.e. the trolley, there is at least one cogwheel for moving the trolley by means of the toothed racks inside the boom.

It is characteristic of another advantageous embodiment of the crane according to the invention that, in the load suspension component, i.e. the trolley, there are two cogwheels at minimum which are at least partly rotational in relation to each other, in the sense that the teeth of the cogwheels suit the teeth of the toothed racks no matter where the latter are situated. If, on the other hand, the crane trolley is moved manually without an electric motor to transfer the trolley, the toothed racks can be used to lock the trolley into place. In this case the locking device nail or equivalent is locked within the notch between the teeth of the toothed rack.

Most advantageously, the telescopic boom of the crane comprises at least two metallic components, which go at least partly inside each other, and there is a movable load suspension component inside them. This sort of structure is simple and consequently also economical to manufacture. With the profiles going inside each other, the structure of the crane is made small in size and, above all, low in height. The minimal height of the structure does not take free space inordinately from the loading area. According to the invention, there are either ball or plain shaft bearings such as bronze plain shaft bearings between the profile components in order to reduce the friction caused by the telescopic movement.

It is characteristic of a third advantageous embodiment of the crane according to the invention that

the telescope boom of the crane comprises a screw, such as a ball screw or trapezoidal thread screw, which is positioned inside the immobile boom component or externally in connection with the same, as well as a nut connected with the movable boom component, and

the screw and nut are connected to each other so that, by turning the screw, the movable boom component is mobile in relation to the fixed boom component. According to the invention, the structure in accordance with the screw/nut technology is precise and reliable in operation. Alternatively, in some structures it is possible to also use mechanical toothed rack- and cogwheel-based solutions. In this manner, it is possible to avoid the uncertain wire solutions in equipment according to known techniques, where breakage of the wire can cause dangerous incidents.

It is characteristic of a fourth advantageous embodiment of the crane according to the invention that an electric motor transferring the boom component is connected to the crane's telescopic boom screw to move the boom component in relation to the fixed boom component. Most advantageously, a weak-current electric motor connected to the vehicle's electrical system is used in the crane according to the invention. It is characteristic of a fifth advantageous embodiment of the crane according to the invention that

the crane comprises an electric motor that transfers the boom component, and/or an electric motor that lifts loads, and/or an electric motor that transfers the trolley, - a remote control unit is included in the crane to direct the operations of the electric motor that transfers the boom component, and/or the electric motor that lifts loads and/or the electric motor that transfers the trolley,

and the remote control unit is, most advantageously, wireless. The crane or winch can also be remote-controlled. Advantageously, the crane winch and transfer equipment functions can also be arranged as voice- or speech-controlled, whereupon both hands of the user of the crane would remain free to handle the load.

With the crane according to the invention, it is characteristic of a sixth advantageous embodiment that there are connectors in the crane for linking the telescopic boom's fixed component to the vehicle's roof structures and/or support components to support the fixed component of the telescopic boom on the vehicle's floor structures.

The small-sized crane according to the invention can be easily adapted for and installed in both new or old transport vans. However, it is also appropriate for other types of vehicles, trailers or, in addition, stable objects such as containers. The mounting points in roof structures can be fixed or mobile, whereupon adapting and installing the crane are even easier. The cranes in accordance with the invention can total two or more to a vehicle - either aligned or non-aligned - whereupon the most appropriate crane to be used can be selected in keeping with the location of the load and lifting direction.

Most advantageously, an electric motor is connected to the load suspension component to transfer the trolley in order to move the suspension component on parallel rails by means of a cogwheel. Most advantageously, the movable load suspension component of the crane comprises a hoist equipped with a lift wire and an electric engine to lift the load.

The crane-based hoist or winch can be any well-known hoist that is connected with the load suspension component of the telescopic boom according to the invention.

Advantageously, the hoist or winch is situated inside the telescopic boom, whereupon the load-related lift height that can be achieved with the crane is the greatest possible. The hoist may, however, also take the form of lifting wire or a lifting bed, whose lifting movement is obtained by means of an electric motor that raises the load, or a screw/nut mechanism connected to the load suspension component. Most advantageously, the winch is also equipped with an overloading protection.

In accordance with the present invention, various auxiliary devices or arresters can be connected to the crane, by which various objects, barrels and platforms etc. can be easily and safely lifted and transferred elsewhere. EXAMPLES OF EMBODIMENTS

The invention is explained in the following by means of examples and by referencing accompanying drawings in which the LIST OF FIGURES

Fig. 1 diagrammatically presents a transport van as seen from the side, in which a crane according to the invention is installed.

Fig. 2 corresponds to Fig. 1 and presents the crane in another position.

Fig. 3 diagrammatically presents a transport van as seen from the side, in which a crane according to the invention has been installed.

Fig. 4 corresponds to Fig. 3 and presents the crane in another position.

Fig. 5 diagrammatically presents the crane partly cropped, as well as the vehicle's girders, connected to the roof structures.

Fig. 6 diagrammatically presents the crane in Fig. 5 as well as girders connected to the roof structures of the vehicle.

Fig. 7 diagrammatically presents a cross-section of the fifth crane according to the invention.

Fig. 8 diagrammatically presents a cross-section of the crane in accordance with the sixth embodiment.

Fig. 9 presents a cross-section of the crane in Fig. 8, seen from another direction. Fig. 10 diagrammatically presents the crane in Fig. 8, positioned in the loading area. Fig. 11 diagrammatically presents a cross-section of the sixth crane according to the invention.

Fig. 12 presents a vertical section of a detail of the crane's boom seen from the side. Fig. 13 presents the cogwheels moving the crane's trolley, seen from the side.

Fig. 14 presents a cut along the lines XIV-XIV of the figure 13. Fig. 15 diagrammatically presents a vehicle as seen from the side, in which a crane in accordance with the second embodiment is installed.

Fig. 16 diagrammatically presents a vehicle as seen from behind where the crane has been installed. .

Fig. 17 diagrammatically presents a cross-section of a crane in accordance with the invention.

Fig. 18 presents a cut of a detail of a crane in accordance with the invention. EXPLANATION OF FIGURES

In Fig. 1 , vehicle 10 is presented, which in this example is transport van 10. Crane 20 according to the invention is positioned in the upper component of load space 11 in vehicle 10, so that fixed component 21 of the telescopic crane of crane 20 is longitudinal to vehicle 10. Load suspension component 23 of crane 20 and hoist 50 connected with the same can be transferred to the point of the load 24 to be discharged for lifting.

In Fig. 2, back door 25 of vehicle 10 has been opened and load 24 has been lifted

(vehicle 10) from floor 26, after which load 24 has been transferred out of vehicle 10 and set down on the ground 28. This operation has been performed in such a way that the movable component 22 of the telescopic boom of crane 20 has been transferred as conducted by the fixed component 21 of the telescopic boom in Fig. 2 to the right.

Similarly, load suspension component 23 has also been transferred as conducted by the movable component 22 of the telescopic boom in Fig. 2 to the right. In the situation shown in Fig. 2, load suspension component 23 is directly at the lead of the movable component 22 of the telescopic boom and movable component 22 is in the outermost position. In this case, load 24 has been lowered to the ground 28, as far from vehicle 10 as possible.

In Fig. 3, transport van 10 is presented, in which crane 20 according to the invention has been positioned so that fixed component 21 of the telescopic crane of crane 20 is horizontal to transport van 10. Load suspension 23 of crane 20 has been transferred to the point of load 24 for lifting the latter.

In Fig. 4, the side door of vehicle 10 has been opened and load 24 has been lifted from floor 26 of vehicle 10, transferred away to the side of vehicle 10 and set down on the ground 28. As in Fig. 2, the movable component 22 of the telescopic boom of crane 20 has been transferred as conducted by the fixed component 21 of the telescopic boom in Fig. 4 to the right. Similarly, load suspension component 23 has also been transferred as conducted by the movable component 22 of the telescopic boom in Fig. 4 to the right. Also in this figure, load suspension component 23 is directly at the lead of the movable component 22 of the telescopic boom and movable component 22 is in the outermost position. In this case, load 24 has been lowered to the ground 28 to the side of vehicle 10, as far as possible from the vehicle.

In Fig. 5, crane 20 is presented, to which horizontal girders 44 have been connected. Crane 20 is connected by means of girders 44 to the roof structures of vehicle 10. In this case, mounts 29 at the ends of girders 44 are connected to the ceiling in connection with, for example, the ceiling rack mounts. Girders 44 can, however, be supported also by means of buttressed support columns 15a and 15b on load space floor 26 of vehicle 10, as well as adjusted or equipped with fixed support parts 16a and 16b, as presented in Fig. 10.

In the embodiment presented by Fig 5., screw 34 moving movable component 22 of telescopic boom of crane 20 is located at the side of the telescopic boom's fixed component 21, and it is rotated by cogged belt 45 through the aid of electric motor 36 moving the boom component. In Fig. 5, both parts 21 and 22 of the telescopic boom are partly cut for perception-related reasons so that load suspension component 23 is also visible. In this embodiment, load suspension component 23 does not comprise a transfer mechanism, for reasons of simplicity; rather, suspension component 23 and the load connected to it are moved in a sideways direction by hand.

In Fig. 6, crane 20 is connected to the vehicle's 10 ceiling structures 27 by means of brackets 46, girders 44 and mounts 29. The structure of crane 20 is presented in more detail in Fig. 7.

In Fig. 7, crane 20, its brackets 46 and vehicle's 10 girder 44 connected to its ceiling structures 27 can be seen. Crane's 20 telescopic boom-based fixed component 21 is supported in place by means of brackets 46 against girder 44. At the bottom edge of telescopic boom-based fixed component 21 , there are sliding runners 47, which function as plain bearings between girders 21 and 22. The material of sliding runners 47 may be red metal, for example. Corresponding sliding runners 47 can also be connected to the end of telescopic boom-based movable component 22, which is further inside telescopic boom-based fixed component 21.

Crane's 20 load suspension component 23 is a trolley equipped with rollers 33, which can move along the conductors of telescopic boom-based movable component 22. The movable trolley comprises a hoist 50, such as a winch which lifts the load by means of electric motor 41 and a lifting wire or lifting bed 51. The transfer movement of trolley 23 can be arranged inside the telescopic boom to occur also by means of the electric motor that transfers trolley 23.

Fig. 7 also presents screw 34, which transfers telescopic boom-based movable component 22 and which is located to the side of telescopic boom-based fixed component 21. Screw 34 is rotated by means of electric motor 36 transferring the boom component by means of cogged belt 45 and cogged belt wheels 48a and 48b. Nut part 38, corresponding to screw 34, is connected to telescopic boom-based movable part 22.

Most advantageously, crane's 20 telescopic boom-based fixed component 21 and movable component 22 are manufactured of profiles by bending steel plate. In a similar manner, it is also possible to make the trolley for load suspension component 23. For lighter loads, the use of an aluminium profile in the manufacture of crane 20 parts is possible.

Fig. 8 presents crane 20, whose outer telescopic boom-based component 21 is suspended against a horizontal girder 44 so that crane 20 can be moved sideways. In order to facilitate transfer, sliding runners 52 rest against girder 44 in bracket part 46 of the crane 20. Inside component 21 respective to the outer telescopic boom, telescopic boom-based component 22 - which moves inside it in a longitudinal direction - is found, and between them sliding runners 471 and 47b are found. The trolley for load suspension component 23 moves inside telescopic boom component 22, dependent on rollers 33. What is essential to crane 20 in keeping with the example presented by Fig. 8 is the fact that the transfer of more deeply embedded telescopic boom-based component 22 and the trolley transfer respective to load suspension component 23 are performed manually, without the aid of electric motors to transfer the trolley or by similar assistance. In this case, these transfer movements are obtained quite rapidly and the equipment is subsequently very light in structure and easy to use. Naturally, in this respect the components to be moved should be appropriately light and well-pivoted, so that the user does not need to apply considerable power. In the example in Fig. 8, components 21 and 22 of the telescopic boom are pivoted with sliding runners 47a, 47b and 52, which in most cases are sufficient. Naturally, sliding runners 47a, 47b and 52 can, however, be replaced with rotating bearings if needed. Since crane 20 in accordance with the example presented in Fig. 8 operates manually, it is also equipped with manual movement capability. For this purpose, vertical beam 55, which has transfer handle 53 and brake handle 54, is connected to the trolley respective to load suspension component 23. When the user of crane 20 wishes to transfer the trolley of load suspension component 23 inside telescopic boom-based component 22, which is the component inside the other one, s/he grips transfer handle 53. On the other hand, if the user wishes to halt the trolley respective to load suspension 23, s/he turns brake handle 54, whose operation is explained in greater detail in the following figure. Also in the more deeply embedded telescopic boom-based component 22, there may be a separate handle for its transfer inside the outer telescopic boom-based component 21. According to the invention, the transfer of the deeper telescopic boom-based component 22 nevertheless occurs in a convenient manner, when the user locks the trolley respective to load suspension component 23 in place by reference to the more deeply embedded telescopic boom 22 by means of brake handle 54, and afterwards transfers both the trolley respective to load suspension component 23 and the deeper telescopic boom-based component 22 simultaneously.

In Fig. 9, a cross-section of crane 20 from Fig. 8 is presented as seen from the side. In Fig.

9, sliding runners 47a, 47b and 52, by whose aid crane's 20 telescopic boom-based components 21 and 22 are pivoted to each other and crane 20 as a whole is

correspondingly horizontal to girder 44, can be clearly seen. In Fig. 9, the braking mechanism of load suspension component 23 is also presented as a cross-section.

Vertical beam 55 is comprised within the braking mechanism. Crank mechanism 56, to which is connected brake pad 57, is inside the braking mechanism. When the brake crank is turned, crank mechanism 56 presses brake pad 57, closing it against the deeper telescopic boom-based component (22) and locking these parts to each other.

Fig. 9 presents a wedge-shaped component forming an inclined surface, which is connected to the deeper telescopic boom-based component 22; in the example presented in Fig. 9, there are two wedge-shaped components 58 at both edges of the telescopic boom at the point of the trolley rollers 33 of load suspension component 23. These wedge- shaped components 58 enable the realization of a gentle transition point, so that the trolley of load suspension component 23 is easily movable from within the more deeply embedded telescopic component 22 to inside the outer telescopic boom-based component 21 and back. In this case, crane 20 is easily usable in an effective manner, also by hand. Fig. 10 presents a support structure 40 positioned in loading area 11 of vehicle 10, which has support columns 15a and 15b supported on floor 26 of vehicle 10 as well as adjustabl support components 16a and 16b. The horizontal section of support structure 40 is formed by crosswise girder 44, to which crane 20 is connected in the previous figures against plain shaft bearings 52, so that crane 20 can be transferred sideways. In this case, we achieve the excellent advantage that crane 20 can be transferred to the upper corner of loading area 1 of vehicle 10 always when not in use.

Furthermore, fig. 11 presents a cross-section of a crane 20 according to the invention, which can be connected to the upper section of vehicle 10 or some other load space. The attachment can be performed either to the ceiling structures, some other part of the vehicle body, or to the floor by means of dependent beams as presented in the previous embodiments. Telescopic boom-based fixed component 21 of crane 20 is supported in place so that it is immobile, and there is a deeper telescopic boom 22 inside it which is moved as required as dependent on slide pads 47, in order to change the length of crane's 20 boom. The deeper telescopic boom 22 is moved, also in this embodiment, with screw 34 transferring the boom component, which is situated longitudinally inside the boom and operated by an electric motor. In Fig. 11 , the conductors or rails 59 and 60 have been connected to the lower edges of both telescopic booms 21 and 22, the trolley moving longitudinally, i.e. resting on the supporting rollers 33 of load suspension component 23. The bracket surfaces of rails 59 and 60, against which rollers 33 rest, are located adjacent to each other at the same height, so that together they compose the bracket surface for rollers 33. In this case, the other edge of each roller 33 rests on fixed telescopic boom 21 rail 59 and the roller's (33) opposite edge rests on rail 60 of movable telescopic boom-based component 22 from crane 20. It can also be arranged that the trolley has two adjacent, same-size rollers, of which the first one rests against rail 59 of fixed telescopic boom 21 and the second one rests against rail 60 of movable telescopic boom 22. As the bracket surfaces of rails 59 and 60 are situated at the same horizontal plane, support rollers 33 of the trolley rest mainly either against rail 59 of fixed telescopic boom 21 or against rail 60 of movable telescopic boom 60, depending on the point where the trolley of boom 23 is. This solution provides rollers 33 of load suspension component 23 of crane 20 with an even conductor along the length of the entire extendable boom, so that the conductor's bracket surface does not have any sort of point of discontinuity or threshold with regard to height for the trolley's supporting rollers. In Fig. 11 , the movement of load suspension component 23 inside telescopic booms 21 and 22 is arranged by means of toothed racks 61 and 62 as well as cogwheels 63 and 64 Toothed rack 61 is formed at the upper edge of rail 59 of fixed telescopic boom 21 , and toothed rack 62 is formed at the upper edge of rail 60 of movable telescopic beam-based component 22. Both toothed racks 61 and 62 are at the same height. Correspondingly, in load suspension component 23, i.e. in the trolley, cogwheels 63 and 64 are found, in such manner that cogwheel 63 functions together with toothed rack 61 and cogwheel 64 functions together with toothed rack 62. When the trolley connected to load suspension component 23 is transferred by electric motor, which is not presented in Fig. 11 , cogwheels 63 and 64, which rest on toothed racks 61 and 62, rotate. Consequently, load suspension component 23 moves inside crane's 20 telescopic booms 21 and 22. When telescopic booms 21 and 22 are inside each other, cogwheels 63 and 64 touch both toothed racks 61 and 62. However, when movable telescopic boom component 22 is pushed out from inside telescopic boom 21 , only cogwheel 63 functions together with toothed rack 61 or cogwheel 64 functions together with toothed rack 62. As to whether cogwheel 63 or 64 and toothed rack 61 or 62 bring about movement with regard to load suspension component 23, this depends on whether load suspension component 23 is inside fixed telescopic boom 21 or at the point of movable telescopic boom component 22 and inside it.

In Fig. 12, a boom-based detail concerning crane 20 is presented in cut format, in which part of movable telescopic boom 22 is seen from inside telescopic boom 21 , and inside the boom its trolley moving longitudinally - i.e. load suspension component 23. Trolley's 23 support rollers 33 rest on rails 59 and 60 adjacent to each other, i.e. fixed telescopic boom 21 to rail 59 or movable telescopic boom component 22 to rail 60, depending on which point of the boom trolley 23 is. In the situation presented in Fig. 12, trolley's 23 support rollers 33 rest on both rails 59 and 60, since these rails are next to each other in an area where movable telescopic boom component 22 is inside telescopic boom 21. It is essential that rollers 33 move flexibly and smoothly at the same horizontal plane as the rails from one rail to another, without points of discontinuity or threshold in height.

In addition, in Fig. 12, toothed racks 61 and 62, situated at the same horizontal plane, function in similar manner to the extent that cogwheels 63 and 64, which are not presented in Fig. 12 and which move the trolley, i.e. the load suspension component 23, rest either against both toothed racks 61 and 62 or against one of them, depending on where boom trolley 23 is situated. Fig. 13 presents cogwheels 63 and 64, which are on the same axle and which transfer trolley 23 of crane 20; these cogwheels rotate by means of the electric motor transferring the trolley, which is not presented in the drawings. When movable telescopic boom

component 22 is moved freely inside fixed telescopic boom 21 , its toothed rack 62 teeth may, when the boom stops, remain at a different spot than the teeth of toothed rack 61 respective to fixed telescopic boom 21. For this reason, interval 65 has formed at

cogwheels 63 and 64, which allows cogwheels 63 and 64 to rotate in relation to each other so the extent that cogwheel 63 goes compatibly into the teeth of fixed telescopic boom 21- based toothed rack 61 , and correspondingly cogwheel 64 goes compatibly into the teeth of movable telescopic boom component 22-based toothed rack 62. The synchronization of cogwheels 63 and 64 enables the flexible movement of trolley 23 so that cogwheels 63 and 64 do not strike the teeth of toothed racks 61 and 62. In Fig. 14, a cropped picture of cogwheels 63 and 64 is presented, in which interval 65 is shown for illustrative purposes; the interval enables the synchronization of cogwheels 63 and 64 - i.e. a rotational movement occurring in relation to each other.

In Fig. 15, transport van 10 is presented as seen from the side and partly sliced, and crane 20 according to the invention is situated in the van's load space 11. Crane 20 is supported . by support structure 40 on floor 26 of load space 11 , and the support structure 40

comprises three support columns (15a, 15b and 15c) and their support parts 16a, 16b and 16c. In Fig. 16, we see more precisely how crane 20, presented in Fig. 15, is supported by floor 26 of load space 11. In the support frame 40, all three support frames supporting the crane consist of an arc taking support from floor 26 of load space 11 ; in Fig. 16, these arcs are support columns 15 a and 15b as well as girder 44 between them. Crane 20 is, in this embodiment, attached via brackets 46 to bracket 44 in the centre of vehicle 10. Support columns 15a and 15b are manufactured of, for example, aluminium profiles.

In the embodiment in Fig. 17, load suspension component 23, i.e. trolley rollers 33, are wider, which ensures that rollers 33 remain on the tracks. The first edge of each roller 33, i.e. in Fig. 17 the deeper edges of rollers 33, rest in crane 20 against rails 59 of telescopic boom-based fixed component 21. In the embodiment presented in Fig. 17, the telescopic boom-based movable component 22 does not have a separate rail, whereupon the other edge of each roller 33 - i.e. the outer edges of rollers 33 in Fig. 17 - rest directly against the edge of telescopic boom-based movable component 22. Both components 21 and 22 of the telescopic boom have toothed racks 61 and 62, to which the cogwheels 61 and 62 c the load suspension component 23 - i.e. trolley - are applied. In the embodiment in Fig. 17, groove 66 has been placed inside crane's 20 telescopic boom; chain 67, which carries cables, is in the groove. It is possible to situate electric cables and control cables (not presented in Fig. 17) of the electric motors transferring the trolley and/or raising the load in cable chain 67 in groove 66. Fig. 18 presents an alternative structure for load suspension component 23 - i.e. the trolley - moving inside crane's 20 telescopic boom; support rollers 33a and 33b are positioned in this structure on both sides of lifting bed 51. This sort of structure ensures that the load on the coil resting on lifting bed 51 , rotated by electric motor 41 which lifts the load, is supported evenly from both sides. Load suspension component 23 i.e. the trolley movement is achieved in connection with toothed racks 61 and 62 by means of cogwheel 63, which is rotated by trolley-transferring electric motor 68.

ADDITIONAL OBSERVATIONS To a person skilled in the art, it is clear that the invention's various embodiments may vary within the context of subsequently presented patent claims. This being the case, crane 20 according to the invention may be used in many kinds of transport vehicles. However, it can be used just as well in freight transport trailers as well as in transport containers and stationary containers. In addition to fixed component 21 , one or more movable

components 22 may be added to crane's 20 telescopic boom.

REFERENCE NUMBER LIST

10 Vehicle

11 Load space

15 Support column

16 Support component

20 Crane

21 Telescopic boom-based fixed component

22 Telescopic boom-based movable component

23 Load suspension component, i.e. trolley

24 Load 25 Vehicle door

26 Vehicle floor

27 Vehicle ceiling

28 Ground

29 Mount

30 Roller

31 Conductor

32 Conductor

33 Roller

34 Screw

36 Electric motor transferring boom component

38 Nut

40 Support structure

41 Load-lifting electric motor

42 Bearing

43 Bearing

44 Girder

45 Cogged belt

46 Bracket

47 Sliding runner

48 Pulley

50 Crane

51 Lifting wire or lifting bed

52 Sliding runner

53 Transfer handle

54 Brake handle

55 Vertical beam

56 Crank mechanism

57 Brake pad

58 Wedge-shaped component

59 Rail, i.e. bracket surface

60 Rail, i.e. bracket surface

61 Toothed rack

62 Toothed rack

63 Cogwheel

64 Cogwheel

65 Interval Groove

Chain

Trolley-transferring electric motor