US 12,304,752 B2
Conveyance device
Ryosuke Hoshi, Tokyo (JP); Yasuaki Aoyama, Tokyo (JP); Satoru Kaneko, Tokyo (JP); Hiroyuki Kobayashi, Tokyo (JP); Hiroshi Watanabe, Tokyo (JP); Shinji Azuma, Tokyo (JP); and Kuniaki Onizawa, Tokyo (JP)
Assigned to HITACHI HIGH-TECH CORPORATION, Tokyo (JP)
Appl. No. 18/029,398
Filed by HITACHI HIGH-TECH CORPORATION, Tokyo (JP)
PCT Filed Aug. 25, 2021, PCT No. PCT/JP2021/031206
§ 371(c)(1), (2) Date Mar. 30, 2023,
PCT Pub. No. WO2022/085299, PCT Pub. Date Apr. 28, 2022.
Claims priority of application No. 2020-175128 (JP), filed on Oct. 19, 2020.
Prior Publication US 2023/0365354 A1, Nov. 16, 2023
Int. Cl. B65G 54/02 (2006.01); B65G 43/00 (2006.01); G01N 35/04 (2006.01); H01F 7/20 (2006.01)
CPC B65G 54/02 (2013.01) [B65G 43/00 (2013.01); G01N 35/04 (2013.01); H01F 7/206 (2013.01); G01N 2035/0477 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A conveyance device configured to convey an object to be conveyed, wherein
the object to be conveyed is conveyable by a magnetic force,
the conveyance device comprises:
a plurality of electromagnets, each of the electromagnets including a tooth and a winding wound around the tooth, the tooth including a magnetic body;
a yoke configured to magnetically couple the respective electromagnets; and
a driving circuit configured to supply a current to the winding, and
the tooth has a cavity formed to extend in an axial direction, wherein the cavity is opened on a surface of the tooth, the surface not facing the object to be conveyed.