Sheet end position regulating device, sheet loader incorporating the sheet end position regulating device, sheet feeding device incorporating the sheet end position regulating device, and image forming apparatus incorporating the sheet end position regulating device

A sheet end position regulating device comprising:

• a first contact body disposed movable toward a sheet loading portion on which a sheet is loaded and configured to contact an end portion of the sheet;
• a fixing body disposed movable between a fixing position at which a position of the first contact body to the sheet loading portion is fixed and a releasing position at which the position of the first contact body is released;
• a biasing body configured to apply a biasing force and bias the first contact body toward an end of the sheet;
• and
• a switching body configured to switch the biasing force applied by the biasing body between a force applying state in which the biasing force of the biasing body is applied to the end of the sheet via the first contact body and a force suspending state in which the biasing force of the biasing body is not applied to the end of the sheet via the first contact body,
• the switching body starting to switch to the force applying state after the fixing body has started to move when the fixing body moves from the releasing position to the fixing position,
• the switching body starting to switch to the force suspending state before the fixing body starts to move when the fixing body moves from the fixing position to the releasing position.