Conveying system using linear motor
AssigneeMinebea Co., Ltd.
InventorsShinichi Takayanagi, Morimasa Kajioka
Life of this patent
Estimating the term…
Abstract
An inexpensive conveying system using a linear motor permits accurate stop positioning and controls generation of dust. The conveying system has a unit including a passive moving assembly and a plurality of sets of fixed coils to perform sending, non-energization travel, receiving, and positioning. The conveying and positioning unit is formed by the passive moving assembly composed of a permanent magnet and a linear sensor scale, and a fixed assembly having coils opposed to the moving assembly and sending and receiving sensor heads for detecting the position of the liner scale of the moving assembly. To achieve lower cost, the coils of the fixed assembly are provided only at a sending station and a receiving station, no additional coil being disposed therebetween.
Claims9
A conveyor system, comprising:
- a linear motor;
- a passive moving assembly connected to said linear motor, and loaded with an article to be conveyed;
- a linear or magnetic scale provided on said moving assembly;
- a rail for guiding said moving assembly;
- a sending drive coil disposed at a sending station associated with said rail;
- a first contactless sensor is disposed at said sending station and said first sensor detects said scale;
- a receiving drive coil disposed at a receiving station associated with said rail, which is positioned away from said sending station;
- a second contactless sensor which is disposed at least at said receiving station and which detects said scale;
- drivers for driving said sending and receiving drive coils;
- and
- control means, to which information regarding the moving assembly from said sensors is connected and to which information the control means is responsive, and said control means being configured to drive said drivers to accelerate and send said moving assembly, thereby achieving non-energization travel, then to decelerate and stop at a predetermined position at the receiving station following non-energization travel.
Dependencies are inferred from the claim text.