Sheet supply device and sheet supply method

Patent metadata

Field	Value
Publication number	US-2021009373-A1
Application number	US-201816767042-A
Country	US
Kind code	A1
Filing date	Nov 29, 2018
Priority date	Nov 30, 2017
Publication date	Jan 14, 2021
Grant date	—

Abstract

Provided are a sheet supply device and a sheet supply method capable of keeping the precision of a sheet separating operation constant regardless of differences in diameter dimensions of rolls. A second guide roller is disposed at an opposite side of a standby side roll with respect to a tangential line to the outer peripheral surface of the standby side roll at a pressing position in a state in which the pressing roller is pressed against the pressing position, and guides a sheet such that the sheet is guided from the pressing roller in a direction away from the standby side roll. Furthermore, the second guide roller is fixed to a moving unit so as to be configured to approach and move away from the standby side roll together with the pressing roller.

First claim

1 . A sheet supply device for supplying a sheet from a first roll and a second roll around which the sheet is wound, the sheet supply device comprising:
a first support shaft that supports the first roll at a center position thereof; a second support shaft that supports the second roll at a center position thereof; a joining mechanism that joins the sheet of the second roll to the sheet of the first roll when a remaining quantity of the sheet of the first roll is equal to or less than a preset remaining quantity in a state in which the sheet of the first roll is supplied; and a guide roller that guides the sheet drawn from the first roll, wherein the joining mechanism includes a pressing roller that presses a middle part of the sheet between the first roll and the guide roller against a preset pressing position on an outer peripheral surface of the second roll, and a moving unit that supports the pressing roller such that the pressing roller is configured to approach and move away from the outer peripheral surface of the second roll between a forward position where the pressing roller is pressed against the pressing position and a retracted position where the pressing roller is away from the pressing position, and the guide roller is disposed on an opposite side of the second roll with respect to a tangential line to the outer peripheral surface of the second roll at the pressing position in a state in which the pressing roller is pressed against the pressing position of the second roll, and guides the sheet such that the sheet is guided from the pressing roller in a direction away from the second roll, and furthermore is fixed to the moving unit so as to be configured to approach and move away from the second roll together with the pressing roller.

2 . The sheet supply device according to claim 1 , further comprising: another guide roller that guides the sheet such that the sheet is guided from the another guide roller to the pressing position in a direction approaching the second roll and is fixed to the moving unit so as to be configured to approach and move away from the second roll together with the pressing roller, the another guide roller being provided on an opposite side to the second roll with respect to the tangential line to the outer peripheral surface of the second roll at the pressing position and on an opposite side to the guide roller with respect to a plane including the pressing position and a center of the pressing roller in a state in which the pressing roller is pressed against the pressing position of the second roll,
wherein an angle formed by the sheet guided from the pressing position to the guide roller and the tangential line is greater than an angle formed by the sheet guided from the another guide roller to the pressing position and the tangential line.

3 . The sheet supply device according to claim 2 , further comprising: a cutter that is configured to cut the sheet of the first roll between the another guide roller and the pressing roller and is fixed to the moving unit,
wherein the moving unit supports the pressing roller such that the center of the pressing roller and a center of the second support shaft are positioned on a same plane, and the pressing roller is movable in a horizontal direction, the guide roller is disposed above the pressing roller, and the another guide roller and the cutter are disposed below the pressing roller.

4 . The sheet supply device according to claim 3 , further comprising:
an urging mechanism that is switchable between a supply state in which a downward force is supplied to a portion positioned below the cutter on the sheet of the first roll and a stop state in which the supply of the downward force is stopped; and a controller that performs control to switch the urging mechanism from the stop state to the supply state, wherein the cutter is fixed to the moving unit in a state in which the cutter can be moved between a non-cutting position separated from the sheet and a cutting position where the sheet is cut, and the controller switches the urging mechanism from the stop state to the supply state in accordance with a timing when the cutter is operated to the cutting position while operating the cutter from the non-cutting position to the cutting position when the remaining quantity of the sheet of the first roll becomes equal to or less than a preset remaining quantity.

5 . A sheet supply method for supplying a sheet from a first roll and a second roll around which the sheet is wound, the sheet supply method comprising:
a first supply step of supplying the sheet of the first roll supported at a center position by a first support shaft; and a joining step of joining the sheet of the second roll to the sheet of the first roll using a joining mechanism that joins the sheet of the second roll to the sheet of the first roll when a remaining quantity of the sheet of the first roll is equal to or less than a preset remaining quantity in a state in which the sheet of the first roll is supplied, wherein the joining mechanism includes a pressing roller that presses a middle part of the sheet between a guide roller for guiding the sheet drawn from the first roll and the first roll against a preset pressing position on an outer peripheral surface of the second roll, and a moving unit that supports the pressing roller such that the pressing roller is configured to approach and move away from the outer peripheral surface of the second roll between a forward position where the press roller is pressed against the pressing position and a retracted position where the press roller is away from the pressing position, and in the joining step, by moving the moving unit in a direction approaching the second roll, the sheet is guided such that the sheet is guided from the pressing roller in a direction away from the second roll by pressing the pressing roller against the pressing position and disposing the guide roller fixed to the moving unit on an opposite side of the second roll with respect to a tangential line to the outer peripheral surface of the second roll at the pressing position.

Assignees

• Zuiko Corp

Inventors

• Tsujimoto Yoshiaki

Classifications

• B29C65/80

  Rotatable transfer means {for loading or unloading purposes, i.e. turret transfer means (B29C65/7879 takes precedence; in-line machines using carriers, provided with holding means, said carriers moving in a closed path B29C65/7867; in-line machines using conveyor belts or conveyor chains B29C65/787)} · CPC title

• B29C65/741

  characterised by the relationships between the joining step and the severing step (cutting as mechanical pre-treatment B29C66/02241; cutting as thermal pre-treatment B29C66/0246; cutting as mechanical after-treatment B29C66/0326; cutting as thermal after-treatment B29C66/0346) · CPC title

• B29C65/74

  by welding and severing {, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area} · CPC title

• B65H2511/14

  Diameter, e.g. of roll or package · CPC title

• B65H2408/2411

  with protruding guiding roll or surface between unwound rolls on mobile assembly · CPC title