| 摘要 |
PURPOSE:To reduce the equipment and space by arranging a control air supply device in the vicinity of a color changing device, and controlling an opening and closing valve of the color changing device with a three-way valve controlling air supply pipe of the control air supply device. CONSTITUTION:A control air supply device 10 is arranged in the vicinity of a color changing device 2, or united with the device 2 to a body. The opening and closing valves V1-V8 of the color changing device 2 can be opened and closed 2<n> times by pipes Q1, Q2, and Q3 for supplying control air to n-number of three- way valves provided to the control air supply device 10. Since the piping material and piping man-hours can be sharply reduced in this way, the equipment and space are reduced.
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