| 摘要 |
A zone-controlled in-line, stacked-roller conveyor belt. The belt has pairs of stacked rollers-a top article-supporting roller and a bottom driven roller. The top and bottom rollers contact each other so that when the bottom roller is driven in one direction by contact with a bearing surface under the belt as the belt advances, the top roller rotates in the direction opposite to the direction of belt travel. Articles atop the actuated roller pairs mark time. When the bottom roller is out of contact with the bearing surface, the rollers are braked and do not rotate and the articles atop the braked rollers advance with the belt. The bearing surfaces are arranged in individually controllable segments that are dynamically grouped into zones actuated to halt an article in selected zones. An imaging system is used by a controller to change the zone grouping dynamically. |
