US 12,330,880 B2
Linear conveyance device
Takuma Nakamura, Tokyo (JP); Shin Sakai, Tokyo (JP); Hiroshi Wakayama, Tokyo (JP); Masaoki Iwase, Tokyo (JP); and Kazuhiko Fukushima, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/867,462
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Nov. 7, 2022, PCT No. PCT/JP2022/041450
§ 371(c)(1), (2) Date Nov. 20, 2024,
PCT Pub. No. WO2024/100739, PCT Pub. Date May 16, 2024.
Prior Publication US 2025/0115437 A1, Apr. 10, 2025
Int. Cl. B65G 23/22 (2006.01); B65G 54/02 (2006.01); H02K 41/03 (2006.01)
CPC B65G 23/22 (2013.01) 11 Claims
OG exemplary drawing
 
1. A linear conveyor that moves a conveyance carrier that conveys an object by a linear motor along a stator-side platform disposed in a width direction perpendicular to both a traveling direction of the conveyance carrier and an upper-lower direction, and includes a portion where the stator-side platform is disposed on one side in the width direction, wherein
the conveyance carrier includes:
a conveyance carrier main structure that supports the object;
a first roller provided on the conveyance carrier main structure;
a second roller provided on the conveyance carrier main structure at a height different from a height where the first roller is provided;
a mover-side magnetic material that is provided on a side surface on each of both sides of the conveyance carrier main structure in the width direction and drives the conveyance carrier main structure with respect to the stator-side platform; and
a mover-side counter moment generator that generates a counter moment against overturning of the conveyance carrier between the mover-side counter moment generator and the stator-side platform, and
the stator-side platform includes:
a first rail that is provided on a platform structure provided along a movement path of the conveyance carrier and engages with the first roller;
a second rail that is provided on the platform structure and engages with the second roller;
a stator-side magnetic material provided on the platform structure and paired with the mover-side magnetic material to generate a magnetic attraction force in a horizontal direction; and
a stator-side counter moment generator that is disposed on the platform structure and generates the counter moment between the stator-side counter moment generator and the mover-side counter moment generator paired therewith.