of which leading into the storage space can be closed by two covers which are arranged spaced apart from each other application_number US 53563195 A description in fig1 is the earth in which storage spaces 2 or rooms have been excavated and limited by masonry wall 2a the storage spaces 2 are accessible via a lift 3 having a platform 4 which can be lifted by four hydraulic work cylinders 5 from a lower storage level 6 shown in fig1 into the upper entrance level fig5 the lift opening 8 is closed and opened by two covers 9 and 10 arranged spaced apart by a distance s by the use of the two covers which are arranged spaced apart from each other a tight closing of the lift opening is assured even if the upper cover is damaged by external causes the upper cover 10 is formed in accordance with fig3 and 5 by two flaps 10a 10b on the sides of the flaps 10a 10b facing the lift opening 8 there are fastened toothed sector gears 11 12 which are in form locked engagement with stationary racks 13 14 the racks are fastened on foundations 15 16 piston rods 17 18 of actuating cylinders 19 20 are pivoted to the outer end 41 of each flap as shown in fig4 two toothed sector gears 11 12 with racks 13 14 and two actuating cylinders 19 20 spaced apart from each other are associated with each of the flaps 10a 10b bottoms of the cylinders 19 20 are pivotally fastened on wall brackets 21 22.