Installation kit for a pneumatic linear ejector of the type attachable to an arm of a movable arm unwinder

Abstract

An installation kit for a pneumatic linear ejector ( 1 ) comprising an ejector ( 1 ) having a plurality of segments ( 2 a, 2 b, 2 c ) nested one in the other and slidable over each other, the first segment ( 2 a ) and the second segment ( 2 b ) having each a respective central seat ( 3 ) for the passage and/or accommodation of a chuck ( 104 ) configured to grasp a core ( 106 ) of a reel ( 102 ), the seats ( 3 ) being coaxial and defining a central axis (A); the first segment ( 2 a ) being defined by an annular cylinder ( 20 ) attachable to an unwinder ( 100 ) and having a base ( 21 ) adapted to face the unwinder ( 100 ); the annular cylinder ( 20 ) has an outer wall ( 22 ) having an opening ( 15 ), the kit further comprising an adapter ( 37 ) having an annular cavity ( 16 ) adapted to be connected with a fluid source and to be positioned at the opening ( 15 ) for introducing fluid into said annular cylinder ( 20 )

1 . Installation kit for a pneumatic linear ejector of the type attachable to an arm of a movable arm unwinder for reels; said kit comprising an ejector having a plurality of segments nested one in the other and slidable over each other, the first segment and the second segment having each a respective central seat for the passage and/or accommodation of a chuck configured to grasp a core of a reel, said seats being coaxial and defining a central axis; the first segment being defined by an annular cylinder attachable to an unwinder and having a base adapted to face said unwinder; wherein said annular cylinder has an outer wall having an opening, said kit further comprising an adapter having an annular cavity adapted to be connected with a fluid source and to be positioned at the opening for introducing fluid into said annular cylinder. 
     
     
         2 . The kit of  claim 1 , wherein said adapter comprises a pair of sealing rings which are adapted to be associated with the outer wall of the annular cylinder. 
     
     
         3 . The kit of  claim 1 , wherein said adapter has an outer cylindrical wall configured to be placed around the outer wall of the annular cylinder. 
     
     
         4 . The kit of  claim 3 , also comprising an inner cylindrical wall adapted to be fixed to the annular cylinder and has at least one opening adapted to be placed at the opening of the annular cylinder. 
     
     
         5 . The kit of  claim 3 , wherein said adapter comprises at least one bearing adapted to be arranged between the outer cylindrical wall of the adapter and the outer wall of the annular cylinder or between the outer cylindrical wall and the inner cylindrical wall of the adapter. 
     
     
         6 . The kit of  claim 1 , wherein said ejector comprises a closing portion fixed to the first segment and closing the seat, said closing portion being configured to support said chuck. 
     
     
         7 . The kit of  claim 6 , wherein said first segment has an inner wall defining the seat, said closing portion being connected to said inner wall. 
     
     
         8 . The kit of  claim 1 , wherein the second segment is defined by an annular piston inserted in said annular cylinder, the second segment having a plurality of cylinders, the last segment being defined by a plurality of pistons each inserted in a respective cylinder of the second segment. 
     
     
         9 . The kit of  claim 8 , wherein the cylinders of the second segment are angularly equally spaced with respect to said central axis. 
     
     
         10 . An unwinder for reels comprising a pair of vertically arranged arms adapted to move away from and/or toward each other; a horizontally arranged shaft connected to an upper end of one of said arms; a chuck coaxially connected to said shaft; a kit according to  claim 1 , said chuck being fixed to the closing portion of said ejector, said adapter being placed on the outer wall of the annular cylinder.