Inner container made of plastic and transport and storage container for liquids having an inner container made of plastic

Abstract

The invention relates to an inner container (15) made of plastic for transporting and storing liquids, the inner container (15) having an outlet socket (18) for connecting an outlet fitting (17) on a front side, a bottom wall (20) connecting two side walls (23, 24), a rear wall (22) and a front wall (16) of the inner container (15) and serving to support the inner container (15) on a pallet floor (21) of a transport pallet (11) provided with an outer jacket (14) for receiving the inner container (15), and a top wall (25) located opposite the bottom wall (20) and provided with a filling opening, wherein the side walls (23, 24) each have a horizontal corrugation (47, 48), the horizontal corrugations (47, 48) being disposed in a shared central horizontal plane.

1 . An inner container ( 15 ) made of plastic for transporting and storing liquids, the inner container ( 15 ) having an outlet socket ( 18 ) for connecting an outlet fitting ( 17 ) on a front side, a bottom wall ( 20 ) connecting two side walls ( 23 ,  24 ), a rear wall ( 22 ) and a front wall ( 16 ) of the inner container ( 15 ) and serving to support the inner container ( 15 ) on a pallet floor ( 21 ) of a transport pallet ( 11 ) provided with an outer jacket ( 14 ) for receiving the inner container ( 15 ), and a top wall ( 25 ) located opposite the bottom wall ( 20 ) and provided with a filling opening,
 characterized in that the side walls each have a horizontal corrugation ( 47 ,  48 ), the horizontal corrugations ( 47 ,  48 ) being disposed in a shared central horizontal plane.   
     
     
         2 . The inner container according to  claim 1 ,
 characterized in that the front wall ( 16 ) has two diagonal corrugations ( 45 ,  46 ) below a horizontal wall axis ( 52 ) of the front wall ( 16 ), the horizontal wall axis ( 52 ) being disposed in a shared horizontal plane with the horizontal corrugations ( 47 ,  48 ), the diagonal corrugations ( 45 ,  46 ) extending between a lower container edge ( 55 ) and the wall axis ( 52 ) and approaching each other.   
     
     
         3 . The inner container according to  claim 2 ,
 characterized in that the rear wall ( 22 ) has two diagonal corrugations ( 45 ,  46 ) below a horizontal wall axis ( 52 ) of the rear wall ( 22 ), the horizontal wall axis ( 52 ) being disposed in a shared horizontal plane with the horizontal corrugations ( 47 ,  48 ), the diagonal corrugations ( 45 ,  46 ) extending between a lower container edge ( 55 ) and the wall axis ( 52 ) and approaching each other.   
     
     
         4 . The inner container according to  claim 3 ,
 characterized in that the front wall ( 16 ) and the rear wall ( 22 ) each have two diagonal corrugations ( 43 ,  44 ) above the wall axes ( 52 ) of the front wall ( 16 ) and the rear wall ( 22 ), the wall axes ( 52 ) being disposed in a shared horizontal plane with the horizontal corrugations ( 47 ,  48 ), the diagonal corrugations ( 43 ,  44 ) extending from the upper container edge ( 54 ) to the horizontal wall axis ( 52 ) and approaching each other.   
     
     
         5 . The inner container according to  claim 2 ,
 characterized in that the diagonal corrugations ( 43 ,  46 ;  44 ,  45 ) on the front wall ( 16 ) and the rear wall ( 22 ) each run parallel to a surface diagonal.   
     
     
         6 . The inner container according to  claim 2 ,
 characterized in that each two diagonal corrugations ( 43 ,  46 ;  44 ,  45 ) coming from a shared lateral container edge ( 50 ,  51 ) form a pair of corrugations ( 57 ,  58 ,  59 ,  60 ) and have longitudinal axes forming an isosceles triangle with the container edge ( 50 ,  51 ).   
     
     
         7 . The inner container according to  claim 6 ,
 characterized in that the diagonal corrugations ( 43 ,  46 ;  44 ,  45 ) of each pair of corrugations ( 57 ,  58 ,  59 ,  60 ) are disposed at an angle of 45° to the lateral container edge ( 50 ,  51 ).   
     
     
         8 . The inner container according to  claim 6 ,
 characterized in that the diagonal corrugations ( 43 ,  46 ;  44 ,  45 ) of a pair of corrugations ( 59 ,  60 ) have longitudinal axes intersecting with the horizontal wall axis ( 52 ) in a shared horizontal intersection M.   
     
     
         9 . The inner container according to  claim 6 ,
 characterized in that the pairs of corrugations ( 57 ,  58 ) disposed on the front wall ( 16 ) and the rear wall ( 22 ) have a distance x between the horizontal intersections S 1  and S 2  of their longitudinal axes with the horizontal wall axis ( 52 ).   
     
     
         10 . The inner container according to  claim 2 ,
 characterized in that distal corrugation ends ( 61 ) of the diagonal corrugations ( 43 ,  44 ,  45 ,  46 ) extend into the lateral container edge ( 50 ,  51 ).   
     
     
         11 . The inner container according to  claim 2 ,
 characterized in that distal corrugation ends ( 61 ) of the diagonal corrugations ( 43 ,  44 ,  45 ,  46 ) extend into container corners ( 33 ,  34 ).   
     
     
         12 . The inner container according to  claim 2 ,
 characterized in that the diagonal corrugations ( 43 ,  44 ,  45 ,  46 ) have a corrugation bottom ( 64 ) continuously rising toward a wall surface ( 63 ) at their proximal corrugation ends ( 62 ).   
     
     
         13 . The inner container according to  claim 2 ,
 characterized in that corrugation ends ( 65 ) of the horizontal corrugations ( 47 ,  48 ) extend into the container edges ( 50 ,  51 ).   
     
     
         14 . The inner container according to  claim 13 ,
 characterized in that the horizontal corrugations ( 47 ,  48 ) have a concave corrugation bottom ( 64 ) which has an enlarged profile radius ( 67 ) for forming corrugation widenings ( 66 ) at the corrugation ends ( 65 ).   
     
     
         15 . The inner container according to  claim 14 ,
 characterized in that the corrugation widenings ( 66 ) have at least a radial corrugation ( 68 ) running in the corrugation bottom ( 64 ).   
     
     
         16 . The inner container according to  claim 14 ,
 characterized in that at least a horizontal corrugation ( 69 ) is formed in the front wall ( 16 ) and the rear wall ( 22 ) adjacent to the corrugation widenings ( 66 ).   
     
     
         17 . A transport and storage container for liquids, the transport and storage container comprising an inner container made of plastic according to  claim 1 . 
     
     
         18 . A method for folding an inner container according to  claim 1 ,
 characterized in that a point load P is externally applied to the surface centers of the front wall ( 16 ) and the rear wall ( 22 ) and a linear load L is externally applied along the horizontal corrugations ( 47 ,  48 ) of the side walls ( 23 ,  24 ) in such a manner that the front wall ( 16 ) and the rear wall ( 22 ) are moved toward each other and the side walls ( 23 ,  24 ) are moved toward each other, a surface load F being simultaneously exerted on the bottom wall ( 20 ) and the top wall ( 25 ) in such a manner that the bottom wall ( 20 ) and the top wall ( 25 ) move toward each other.