Roll transfer device and method

A roll transfer device comprising:

• a plurality of holding units spaced apart from each other in a first direction, supporting a roll core seated thereon;
• a pair of elevating units disposed on both upper sides in the first direction to elevate a roll in a second direction and connected to each other by a connection plate;
• a pair of alignment units provided on the connection plate and disposed on both sides in the first direction to align a position of the roll in the first direction;
• and
• a pair of transfer units transferring the roll, in which the roll core is seated on the pair of holding units, in a third direction by simultaneously moving the pair of holding units in the third direction,
• wherein the alignment unit includes
• a pair of LM guide rails spaced apart from each other along the third direction on the connection plate and extended along the first direction,
• a moving plate coupled to the pair of LM guide rails through one or more LM blocks so as to linearly move along the first direction,
• a pair of support blocks provided to be adjacent to the LM guide rail on the connection plate and spaced apart from each other along the first direction,
• a rotating shaft connecting the pair of support blocks,
• a driving motor connected to the rotating shaft through a coupler on the connection plate to transfer a driving force to the rotating shaft,
• a carrier disposed on the rotating shaft and coupled to a lower surface of the moving plate,
• an extension frame provided on the lower surface of the moving plate and extended downward by passing through an opening formed at a position, at which the pair of LM guide rails are spaced apart from each other, in the connection plate,
• a hand block provided in the extension frame and inserted into the roll core seated on an upper portion of the holding unit, and
• an inner diameter detection sensor provided inside the hand block to detect an inner diameter of the roll core,
• when the roll core is seated on the pair of holding units, the moving plate linearly moves in the first direction by driving of the driving motor and at the same time the extension frame and the hand block linearly move in the first direction to insert the hand block into the roll core,
• when the inner diameter detection sensor detects the inner diameter of the roll core, driving of the driving motor is stopped so that the insertion of the hand block is stopped,
• the roll is elevated by the pair of elevating units in a state that the hand block is inserted into the roll core,
• in a state that the roll is eccentric along the first direction, a distance from an initial position of each of the roll cores on both sides in the first direction to a position where the inner diameter detection sensor detects the inner diameter of the roll core is calculated so that the driving motor of each of the pair of alignment units is driven with different strokes, and
• the fifth plate, the extension frame and the hand block of each of the pair of alignment units move along the first direction with different strokes together with the roll by the driving motor to align the roll, which is eccentric along the first direction, in the first direction.

A roll transfer method comprising:

• seating a roll core on a pair of holding units at a position between the pair of holding units spaced apart from each other in a first direction by an unmanned transport vehicle or a forklift to face each other;
• inserting a hand block of each of a pair of alignment units disposed at both sides of the roll core into the roll core at both sides of the roll in the first direction;
• elevating the roll in the second direction by a pair of elevating units disposed to be spaced apart from each other in the first direction in a state that the hand block is inserted into the roll core;
• aligning the roll along the first direction by driving each of the pair of alignment units with different scrolls to correspond to an initial position of each of the roll cores on both sides of the roll eccentric along the first direction;
• seating the roll core on the pair of holding units again by descending the roll, which is aligned along the first direction, in the second direction by descending of the pair of elevating units along the second direction;
• recognizing a unique identification number for a material wound on the roll through a barcode reader while rotating the roll core by rotation of any one of a pair of seating rollers respectively provided in the pair of holding units to seat the roll thereon;
• and
• transferring the roll to a stacker crane by moving the pair of holding units in the third direction by movement of the pair of transfer units, in which the pair of holding units are respective disposed, in the third direction to move the roll, which is seated on the pair of holding units, in the third direction.