Abstract: A suction device that holds a member by suction in a stable manner is provided. The suction device includes a columnar main body, a flat end face formed on the main body, a concave part formed in the end face, a fluid flow-forming supply paths for forming a fluid swirl flow in the concave part by discharging fluid into the concave part, the fluid swirl flow generating negative pressure that applies suction to a member, and a linear guide groove formed on the end surface along a direction in which the fluid discharged into the concave part flows out of the concave part.

Abstract: Swirl flow-forming body includes main body, first end face that is formed at main body and faces a member to which suction is applied, hole that opens on first end face, jetting port that is formed on inner periphery of main body, inner periphery facing hole, and fluid passage that allows fluid to be discharged into hole via jetting port so as to form a swirl flow that generates negative pressure for applying suction to the member. Inner periphery is formed so as to guide fluid discharged via jetting port, in a direction away from the member, to be discharged from hole.

Abstract: A suction device that holds a member by suction in a stable manner is provided. The suction device includes a columnar main body, a flat end face formed on the main body, a concave part formed in the end face, a fluid flow-forming means for forming a fluid swirl flow in the concave part by discharging fluid into the concave part, the fluid swirl flow generating negative pressure that applies suction to a member, and a linear guide groove formed on the end surface along a direction in which the fluid discharged into the concave part flows out of the concave part.

Abstract: Swirl flow-forming body includes main body, first end face that is formed at main body and faces a member to which suction is applied, hole that opens on first end face, jetting port that is formed on inner periphery of main body, inner periphery facing hole, and fluid passage that allows fluid to be discharged into hole via jetting port so as to form a swirl flow that generates negative pressure for applying suction to the member. Inner periphery is formed so as to guide fluid discharged via jetting port, in a direction away from the member, to be discharged from hole.