Designed to slide between the two metal meshes that stabilize the closure plastic of a greenhouse, with the aid of a towing vehicle, with a view to removing plastic already in place, in the event that it is necessary to replace it, and also to renew said plastic, replacing it with new plastic, the machine is constituted by a substantially level frame formed from double side members (7) that are joined at their front end, forming a plane inclined upwards and forwards, and at their rear end in a rounded manner, giving said frame a sledge effect on the lower wire mesh (2), whilst, at the top, said frame incorporates a fork (13) of convex curved profile that in turn confers on the frame a sledge effect on the upper wire mesh (3), both double members being spaced apart from one another by means of a plurality of cross members (4-5-6) and said frame incorporating support means for the shaft (14) of the roll of new plastic, and also with claws (21-22) for removing the old plastic, and also a series of wheels (11) arranged internally and assisted by a motor (12) by the corresponding transmission for its movement, together with means for hitching to a towing vehicle.
