Patent TW-536567-B (TW)
Title: Loom having magnetic levitation type shuttle, especially a magnetic levitation type shuttle
Inventor: LIOU YUNG-HE
IPC: D03J5/02
Filed: 2001-05-09
Granted: 2003-06-11
Abstract: This invention is a first additional application of patent application No. 90109860, and relates to a loom having magnetic levitation type shuttle, especially a magnetic levitation type shuttle design of no noise, low power consumption, and high efficiency, which shuttle crocheting weft in the loom moves rapidly reciprocating levitatedly along a certain track of magnetic field by the action of magnetic force. A track comprising a set of plate (frame) bodies pivotally connected together at two lower edges, is disposed at the outer rim of both sides of the warp end before the warp is woven into fabric. A long groove is provided at the lower end of the track for the fabric to pass through. Two parallel magnet rows having plural permanent magnets are disposed on the opposite inner surfaces of the two plate (frame) body of the track, respectively. A strip-shaped electromagnet passes through both ends of the set of plate (frame), respectively, between two magnetic rows, and the set of plate (frame) bodies forms an included angle with respective to the warp that is closed to a V-shape. Two magnet rows having plural permanent magnets are provided oppositely at the location on both sides of a shuttle having the V-shaped side at the bottom and opposing the two magnetic rows disposed on the two plate (frame) bodies. The magnet rows provided on inner surfaces of the two plate (frame) bodies and on both sides of the shuttle are arranged to have the same polarity, so that by the magnetic repulsion generated between the permanent magnets, the shuttle is in levitated state in the V-shaped track. A strip-shaped permanent magnet corresponding to the strip-shaped electromagnet provided on the two plate (frame) bodies is disposed between the two magnet rows on both sides of the shuttle, respectively. When electrical current flows through the strip-shaped electromagnet between the two plate (frame) bodies to make the magnet have the same polarity as the strip-shaped permanent magnet on both sides of the shuttle to generate the magnetic repulsion force, the shuttle proceeds in a levitated and frictionless motion along the track subject to the magnetic repulsion force, and further is moved reciprocatingly in the track due to the magnetic repulsion force, and the speed of shuttle varies depending on practical requirements and specification of the strip-shaped electromagnet. A stopping/starting device is disposed on each end of the track and also has a V-shaped track. At least one set of opposite electromagnets is disposed on inner surfaces of the V-shaped track, and when the shuttle enters into the stopping/starting device along the track, the plural set of electromagnets in the V-shaped track of the stopping/starting device are energized to make each set of electromagnets generate magnetic attraction force, so as to realizes decelerating and stopping the shuttle. The operation of each member of the present invention, such as the strip-shaped electromagnet on the track is timely and suitably controlled totally by a computer. In addition, a linkage is pivotally connected between the top of both sides of the set of plate (frame) bodies and a steel reed. When the shuttle completes each movement of crocheting the weft to one side of the loom, the mechanism disposed on the loom drives the steel reed to slide along the direction of weft to secure the weft, and makes the two plate (frame) bodies of the track swing and open. When the steel reed moves back to its original position, the two plate (frame) bodies return to the original V-shaped included angle, enabling the shuttle to continue its reciprocation. Furthermore, for the shuttle to have an effective stability while reciprocating in the track in high speed, the configuration of the loom is changed from a flat bed type to a vertical type, causing the warps to form the V-shaped track and a swinging piece which can automatically adjust the swinging direction along with the thrust of airflow, is disposed on each side of the shuttle top. When the shuttle is moved toward different directions while reciprocating, the two swinging pieces illustrate specific different swinging angles, respectively. When the shuttle moves toward the left side, the swinging piece on the left side tilt to a specific angle, and the right swinging piece stands to a specific angle. Utilizing the specific action of airflow generated between two swinging pieces during the movement of the shuttle is an invention which is a highly creative work of technology using natural rule, and can be applied to the industry.