Cover or trapdoor which is height-adjustable and relevant installation method

Abstract

A kit for producing and method for positioning a cover or trapdoor which is height-adjustable includes providing a frame adapted to be mounted on a base in a manner that is telescopically slidable to a limited extent therein so to be height-adjusted with respect to the base, and at least one cover member which is detachably coupled to the frame and which is adapted to be received in an opening thereof, and providing the as a mold adapted to produce the base from reinforced concrete.

The invention claimed is: 
     
         1 . A kit for producing a cover ( 10 ) or trapdoor which is height-adjustable, comprising:
 a frame ( 22 ), which is adapted to be mounted on a base ( 11 ) in a manner which is telescopically slidable to a limited extent therein, in order to be height-adjusted with respect to the base ( 11 ); and   at least one cover member ( 40 ), which is detachably coupled to the frame ( 22 ) and which is adapted to be received in an opening thereof,   wherein the base ( 11 ) comprises a base mold ( 13 ) adapted to house and produce said base from reinforced concrete.   
     
     
         2 . A kit according to  claim 1 , wherein the base mold ( 13 ) is of a disposable type. 
     
     
         3 . A kit according to  claim 1 , wherein the base mold ( 13 ) comprises reinforcement rods ( 20 ). 
     
     
         4 . A kit according to  claim 1 , wherein the base mold ( 13 ) comprises an abutment seat for the frame ( 22 ), and wherein the frame ( 22 ) comprises a counter-abutment which is configured to interact with the abutment seat, supporting the frame ( 22 ) in the base ( 11 ). 
     
     
         5 . A kit according to  claim 4 , further comprising at least one shim ( 24 ), which is provided for insertion between the abutment seat for the frame ( 22 ) and the counter-abutment of the frame ( 22 ) for levelling the frame ( 22 ) with respect to the base ( 11 ). 
     
     
         6 . A kit according to  claim 5 , wherein the at least one shim ( 24 ) is secured in a non-releasable manner to the base ( 11 ) or the frame ( 22 ). 
     
     
         7 . A kit according to  claim 1 , wherein one or both of the cover member ( 40 ) or the frame ( 22 ) are produced as molds ( 28 ,  41 ), which are configured to be filled with a cement-based mix. 
     
     
         8 . A kit according to  claim 7 , wherein one or both of the frame ( 22 ) or the cover member ( 40 ) comprise reinforcement rods ( 32 ,  43 ). 
     
     
         9 . A kit according to  claim 7 , wherein one or both of the mold ( 28 ,  41 ) of the cover member ( 40 ) or of the frame ( 22 ) is of a disposable type. 
     
     
         10 . A kit according to  claim 1 , wherein surfaces of mutual connection and coupling between the frame ( 22 ) and cover member ( 40 ) are tapered. 
     
     
         11 . A kit according to  claim 1 , wherein one of both of the frame ( 22 ) or the cover member ( 40 ) comprise slot-shaped seats ( 35 ) for lifting devices ( 51 ). 
     
     
         12 . A kit according to  claim 11 , further comprising a cylinder for locks, which is adapted to be inserted and locked in the slot-shaped seats. 
     
     
         13 . A kit according to  claim 1 , wherein the base ( 11 ) comprises a peripheral frame ( 14 ) and an abutment ( 18 ), which is opposite the peripheral frame ( 14 ) and which projects towards an inner side of a shaft, the frame ( 22 ) being in direct abutment against the abutment ( 18 ). 
     
     
         14 . A method for positioning a cover ( 10 ), comprising:
 providing a kit comprising:   a frame ( 22 ), which is adapted to be mounted on a base ( 11 ) in a manner which is telescopically slidable to a limited extent therein, in order to be height-adjusted with respect to the base ( 11 ); and   at least one cover member ( 40 ), which is detachably coupled to the frame ( 22 ) and which is adapted to be received in an opening thereof,   wherein the base ( 11 ) comprises a base mold ( 13 ) adapted to house and produce said base from reinforced concrete; and   assembling the frame with the at least one cover member and the base.   
     
     
         15 . A method for positioning a cover ( 10 ) according to  claim 14 , wherein the base ( 11 ) is placed on an upper surface ( 2 ) of a shaft ( 1 ) and is subsequently fixed with rapidly hardening cement ( 50 ). 
     
     
         16 . A method for positioning a cover ( 10 ) according to  claim 14 , wherein one or both of the mold ( 28 ,  41 ) of the frame ( 22 ) or the cover member ( 40 ) is initially filled only partially with a cement-based mix ( 31 ,  47 ). 
     
     
         17 . A method for positioning a cover ( 10 ) according to  claim 16 , further comprising a step of applying a layer of coarse-finish asphalt ( 53 ) after hardening the cement-based mix ( 31 ). 
     
     
         18 . A method for positioning a cover ( 10 ) according to  claim 17 , wherein the frame ( 22 ) is moved substantially level with the layer of coarse-finish asphalt ( 53 ).