| 摘要 |
PROBLEM TO BE SOLVED: To provide a track securing homogeneous machining accuracy and having high cross sectional strength by forming the track which has a continuous hollow section with a circular cross section and a slit section continuing in the longitudinal direction at part of the circumference of the hollow section and is made of an extruded shape. SOLUTION: This track 1 is installed so that a slit section 11 is located directly below a hollow section 10 and the slit section 11 is not blocked from the outside over the whole length. The slit section 11 is blocked by a long seal member 3 from the inside, the hollow section 10 is airtightly blocked at both ends to airtightly seal it, and a moving body 2 is inserted into it to be moved by the compressed gas (compressed air) fed into the track 1. The moving body 2 is constituted of a tubular barrel section 20 at the center, seal members 21 fixed to both end sections of the barrel section 20 to airtightly block the inner periphery of the track 1, and a connecting member 22 fixed to the barrel section 20 at the upper end and protruded from the slit section 11 at the lower end. The track 1 is extrusion-molded.
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