Various embodiments of a wire pulling and/or wire fishing tool configured for use within a modular storage system and/or to a modular storage unit incorporating functionality to facilitate use for wire fishing and/or pulling tasks are provided. One or more of the units and/or systems described herein facilitate using modular system, such as for wire fishing, by providing flexible methods for coupling modular units together.

An apparatus for removing wrinkles from a sheet material, includes: an expander roll that rotates in a bent state with respect to a rotation axis bent to straighten and remove wrinkles formed in a sheet material being transferred to be wrinkle-removed; a roll bender that generates a bending moment to bend the expander roll; a roll rotator that rotates the expander roll; a roll controller that controls the operation of the roll bender and the roll rotator; a vision camera that photographs one surface of the sheet material being wrinkle-removed, so as to generate an input image; and a wrinkle detection module that detects wrinkles in the sheet material to be detected, using the input image.