Modular extendable trolley
A modular extendable trolley ( 100 ) including a front module ( 1 ) of a loading and unloading floor, a rear module ( 2 ) of the loading and unloading floor, a connection module ( 3 ) between the front module ( 1 ) and the rear module ( 2 ), four wheels ( 4, 40, 4′, 40′ ) for the movement of the trolley, a drawbar ( 10 ) to give direction to the trolley, a tow hook ( 11 ) for hooking an additional trolley into a train of trolleys, wherein the front module ( 1 ) and the rear module ( 2 ) of the loading and unloading floor comprise extensible side portions ( 1′, 1″, 2′, 2″ ) and the connection module ( 3 ) comprises a longitudinal portion ( 3 ′) extendable to vary the dimensions of the trolley ( 100 ) itself.
1. A modular extendable trolley ( 100 ) including: a front module ( 1 ) of a loading and unloading floor; a rear module ( 2 ) of the loading and unloading floor; a connection module ( 3 ) between the front module ( 1 ) and the rear module ( 2 ): four wheels ( 4 , 40 , 4 ′, 40 ′) to move the trolley; a drawbar ( 10 ) to direct the trolley; a tow hook ( 11 ) for hooking an additional trolley into a train of trolleys, the trolley ( 100 ) being characterized in that said front module ( 1 ) and said rear module ( 2 ) of the loading and unloading floor comprises extensible side portions ( 1 ′, 1 ″, 2 ′, 2 ″) and said connection module ( 3 ) comprises a longitudinal portion ( 3 ′) extendable to vary the dimensions of the trolley ( 100 ); and wherein the extensible side portions ( 1 ′, 1 ″, 2 ′, 2 ″) have an elongation made by an articulated system ( 8 ) positioned inside the font module ( 1 ) and the rear module ( 2 ) of the loading and unloading floor; and wherein the articulated system ( 8 ) comprises a plurality of crank elements ( 8 ′) and a plurality of end crank elements ( 8 ″) articulated together.
2. The trolley ( 100 ) according to claim 1 , also comprising a push handle ( 5 ) of the trolley and the drawbar ( 10 ) to draw the direction to the trolley.
3. The trolley ( 100 ) according to claim 1 , wherein the front module ( 1 ) and the rear module ( 2 ) of the loading and unloading floor comprise a support surface ( 13 ) near the right and left side end portions.
4. The trolley ( 100 ) according to claim 1 , wherein the connection module ( 3 ) comprises a position reader ( 6 ) and a dimensional scale ( 7 ) for determining the extension length of the module ( 3 ) itself.
5. The trolley ( 100 ) according to claim 1 , wherein the crank elements ( 8 ′) are articulated to end crank elements ( 8 ″) which are moved by inserting a removable crank or a tool ( 14 ) at one end thereof or by means of a docking station ( 15 ).
6. The trolley ( 100 ) according to claim 1 , wherein the elongation of the extendable portions ( 1 ′, 1 ″) of the front module ( 1 ) and the elongation of the extendable portions ( 2 ′ and 2 ″) of the rear module ( 2 ) along a first axis (Y) and the elongation of the extendable portion ( 3 ′) of the connection module ( 3 ) along a second axis (X) is made by a worm screw mechanism ( 7 ) comprising a screw element ( 7 ′) and a nut screw element ( 7 ″) that mesh with each other.