公开(公告)号：US06557379B1

公开(公告)日：2003-05-06

申请号：US09698212

申请日：2000-10-30

申请人： Masakazu Nagasawa ,  Masayuki Umehara ,  Hiroshi Goto

发明人： Masakazu Nagasawa ,  Masayuki Umehara ,  Hiroshi Goto

IPC分类号： C03B2307

CPC分类号： H01J9/245 ,  C03B23/045 ,  C03B23/0496 ,  C03B23/07

摘要： A pair of chucks, which grip end portions of a cylindrical glass tube blank, are moved by a chuck moving mechanism toward each other, so that softened glass in an intermediate portion of the cylindrical glass tube blank is gathered, thereby forming a shape that is suitable for blow molding a light emitting tube portion. In the approaching movement, the position of one chuck is detected by using a laser position detector, and a result of the detection is fed back to the chuck moving mechanism, so as to control the approach distances of the chucks. The laser position detector detects the position of the chuck itself. Therefore, even when the positional relationship between the chuck and the chuck moving mechanism is varied, or backlash or deformation occurs in the chuck moving mechanism, the correct position of the chuck still is detected irrespective of such variation, backlash or deformation. Consequently, it is possible to effectively prevent the approach distances of the chucks from deviating from a desired value.

摘要翻译： 夹着圆筒形玻璃管坯的端部的一对夹头通过卡盘移动机构朝向彼此移动，使得圆筒形玻璃管坯的中间部分的软化玻璃聚集，形成为 适用于吹塑发光管部分。 在接近运动中，通过使用激光位置检测器检测一个卡盘的位置，并将检测结果反馈到卡盘移动机构，以便控制卡盘的接近距离。 激光位置检测器检测卡盘本身的位置。 因此，即使卡盘和卡盘移动机构之间的位置关系发生变化或卡盘移动机构发生齿隙或变形，也可以检测卡盘的正确位置，而不管这种变化，间隙或变形。 因此，可以有效地防止卡盘的接近距离偏离期望值。