| 摘要 |
PROBLEM TO BE SOLVED: To easily switch over undercoat spraying to topcoat spraying through adjustment of the amount of a spray material and a quick setting agent only by an operator to control a spraying position, in a spray gun to be used to spray materials such as concrete and mortar in works at a tunnel, a slope or the like. SOLUTION: The spray gun is composed of a vehicle body 2, a spray device 3, a quick setting agent adding device 4, an arm device 5, a remote control device 6, and a spray switching device 7, and especially, the spray switch device 7 is located at the remote control device 6 and switches over the undercoat spraying which uses a large amount of the spraying material and quick setting agent to the topcoat spraying which uses a small amount of the spraying material and quick setting agent. COPYRIGHT: (C)2004,JPO
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