Importance

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Abstract

A transfer device includes an arm, a conveyor, and a controller. The arm includes a first hook capable of entering and exiting a first abutment position that allows the first hook to abut the article, and a second hook being capable of entering and exiting a second abutment position that allows the second hook to abut the article. The controller moves the conveyor forward at a speed lower than a stretching speed of the arm when the article placed on the placement area is unloaded onto the shelf, and moves the conveyor rearward at a speed lower than a retracting speed of the arm when the article placed on the shelf is loaded onto the placement area.

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First Claim