| 摘要 |
PURPOSE:To improve accuracy by providing projecting bars to corner angle parts of channel stripes provided on the inner surface of a horizontal part of the outer rail and the opposing surface of the inner rail so as to oppose to each other to form a holding channel, and fitting wire rods rotatably supporting spherical bodies to the holding channel. CONSTITUTION:A second rail 3 is arranged in a hollow place of a first rail 2, and a third rail 4 is arranged in a hollow place of the second rail 3, but channel stripes 5 are formed on the inner surfaces of horizontal parts 2b, 2c of the first rail 2 and the outer side surfaces of horizontal parts 3b, 3c of the second rail 3 opposing hereto, channel stripes are formed on the inner side surface of the horizontal parts 3b, 3c of the second rail 3 and the opposing surfaces of the third rail 4, projecting bars 10 are provided so as to oppose to each other in corner angle parts of the channel stripes 5, and holding channels 11 for wire rods 7 of circle forms in section are formed. The holding channel 11 comes in contact with the outer peripheral surface of wire rods 7 made of stainless steel to wrap them over a half peripheral surface for forming the section arc shaped close to a circular form over a semicircular shape and a bag channel narrow in an opening. The wire rod 7 is press-fitted to the holding channel 11. |
