Deflector roll and method of producing steel sheet using this deflector roll

Abstract

A deflector roll, which changes a travelling direction of a metal strip being threaded, includes a roll main body that is rotatably supported by a roll frame and a sliding member that is provided on an outer surface of the roll main body. The sliding member is configured to have the metal strip wrapped thereon and to be movable along an axial direction of the roll main body while maintaining that wrapped state.

1 . A deflector roll that changes a travelling direction of a metal strip being threaded, wherein:
 the deflector roll comprises a roll main body that is rotatably supported by a roll frame, and a sliding member that is provided so as to be movable relative to an outer surface of the roll main body; and   the sliding member is configured to have the metal strip wrapped thereon and to be movable along an axial direction of the roll main body while maintaining that wrapped state.   
     
     
         2 . The deflector roll according to  claim 1 , wherein
 the sliding member includes a plurality of plate-shaped bodies, and the plate-shaped bodies are arrayed over an entire circumference of the roll main body, with end surfaces in a longitudinal direction located on roll end surface sides of the roll main body and end surfaces in a width direction facing one another.   
     
     
         3 . The deflector roll according to  claim 2 , wherein each of the plate-shaped bodies has an arc surface that forms a part of a wrapping circumferential surface of a circular shape in a state where the plate-shaped bodies are arrayed over the entire circumference of the roll main body. 
     
     
         4 . The deflector roll according to  claim 2 , wherein the plate-shaped bodies are each separately movable along the axial direction of the roll main body. 
     
     
         5 . The deflector roll according to  claim 2 , wherein each of the plate-shaped bodies has a cross-sectional profile in which a central part in the longitudinal direction protrudes outward relative to both end portions of the plate-shaped body. 
     
     
         6 . The deflector roll according to  claim 2 , wherein the roll frame has centering guides that are provided facing the end surfaces of the plate-shaped bodies in the longitudinal direction, in a region of the roll main body except for a wrapping region of the metal strip, and that are hit by the end surfaces in the longitudinal direction of the plate-shaped bodies in a moving state such that the plate-shaped bodies are returned to original positions and centered to a threading center of the metal strip. 
     
     
         7 . The deflector roll according to  claim 6 , wherein:
 the centering guide includes a base that is held on the roll frame and a guide plate that is supported at one end on the base; and   the guide plate has a guide surface of which a free end is farthest away from a roll end surface of the roll main body and to which a distance from the roll end surface of the roll main body decreases gradually toward a fixed end.   
     
     
         8 . The deflector roll according to  claim 1 , wherein the roll frame has guide rollers that are respectively located on both end sides of the metal strip in a width direction to prevent the metal strip from rolling out while being threaded. 
     
     
         9 . The deflector roll according to  claim 1 , wherein the sliding member has an elastic member that elastically supports the sliding member so as to be movable along the axial direction of the roll main body, and that returns the sliding member to an original position by an urging force. 
     
     
         10 . A method of producing a steel sheet using a deflector roll that produces a steel sheet by transferring a metal strip having undergone an upstream-side production process to a downstream-side production process so as to pass through a looper device in which at least one deflector roll according to  claim 1  is installed, wherein
 while the metal strip is passing through the looper device, the sliding member of the deflector roll, along with the metal strip wrapped on the deflector roll, is moved along the axial direction of the roll main body using a frictional force attributable to meandering of the metal strip. 
 
     
     
         11 . A method of producing a steel sheet using a deflector roll that produces a steel sheet by transferring a metal strip having undergone an upstream-side production process to a downstream-side production process so as to pass through a looper device in which at least one deflector roll according to  claim 2  is installed, wherein
 while the metal strip is passing through the looper device, the sliding member of the deflector roll, along with the metal strip wrapped on the deflector roll, is moved along the axial direction of the roll main body using a frictional force attributable to meandering of the metal strip. 
 
     
     
         12 . A method of producing a steel sheet using a deflector roll that produces a steel sheet by transferring a metal strip having undergone an upstream-side production process to a downstream-side production process so as to pass through a looper device in which at least one deflector roll according to  claim 3  is installed, wherein
 while the metal strip is passing through the looper device, the sliding member of the deflector roll, along with the metal strip wrapped on the deflector roll, is moved along the axial direction of the roll main body using a frictional force attributable to meandering of the metal strip. 
 
     
     
         13 . A method of producing a steel sheet using a deflector roll that produces a steel sheet by transferring a metal strip having undergone an upstream-side production process to a downstream-side production process so as to pass through a looper device in which at least one deflector roll according to  claim 4  is installed, wherein
 while the metal strip is passing through the looper device, the sliding member of the deflector roll, along with the metal strip wrapped on the deflector roll, is moved along the axial direction of the roll main body using a frictional force attributable to meandering of the metal strip. 
 
     
     
         14 . A method of producing a steel sheet using a deflector roll that produces a steel sheet by transferring a metal strip having undergone an upstream-side production process to a downstream-side production process so as to pass through a looper device in which at least one deflector roll according to  claim 5  is installed, wherein
 while the metal strip is passing through the looper device, the sliding member of the deflector roll, along with the metal strip wrapped on the deflector roll, is moved along the axial direction of the roll main body using a frictional force attributable to meandering of the metal strip. 
 
     
     
         15 . A method of producing a steel sheet using a deflector roll that produces a steel sheet by transferring a metal strip having undergone an upstream-side production process to a downstream-side production process so as to pass through a looper device in which at least one deflector roll according to  claim 6  is installed, wherein
 while the metal strip is passing through the looper device, the sliding member of the deflector roll, along with the metal strip wrapped on the deflector roll, is moved along the axial direction of the roll main body using a frictional force attributable to meandering of the metal strip. 
 
     
     
         16 . A method of producing a steel sheet using a deflector roll that produces a steel sheet by transferring a metal strip having undergone an upstream-side production process to a downstream-side production process so as to pass through a looper device in which at least one deflector roll according to  claim 7  is installed, wherein
 while the metal strip is passing through the looper device, the sliding member of the deflector roll, along with the metal strip wrapped on the deflector roll, is moved along the axial direction of the roll main body using a frictional force attributable to meandering of the metal strip. 
 
     
     
         17 . A method of producing a steel sheet using a deflector roll that produces a steel sheet by transferring a metal strip having undergone an upstream-side production process to a downstream-side production process so as to pass through a looper device in which at least one deflector roll according to  claim 8  is installed, wherein
 while the metal strip is passing through the looper device, the sliding member of the deflector roll, along with the metal strip wrapped on the deflector roll, is moved along the axial direction of the roll main body using a frictional force attributable to meandering of the metal strip. 
 
     
     
         18 . A method of producing a steel sheet using a deflector roll that produces a steel sheet by transferring a metal strip having undergone an upstream-side production process to a downstream-side production process so as to pass through a looper device in which at least one deflector roll according to  claim 9  is installed, wherein
 while the metal strip is passing through the looper device, the sliding member of the deflector roll, along with the metal strip wrapped on the deflector roll, is moved along the axial direction of the roll main body using a frictional force attributable to meandering of the metal strip.