PURPOSE: To make a self-standing position easily maintainable by setting up an engine, making pressurized gas of its fuel, a dynamo, a battery and other functional parts in a flat box-form case, and among these parts, installing such ones heavier in weight parallelly in the lower part.

CONSTITUTION: A handle 3 is formed in a case formed into a flat box form and with such appearance as a valise or the like, of its one side part being turned upside when this case is placed endwise. Then, a liquid cooling two-cycle engine 10, making high-pressure gas in a gas bomb 25 of its fuel, is housed in the inside of this case 1. In addition, a starter dynamo 18, unifying a starter motor and a DC dynamo as one body, is additionally installed at the right side of the engine 10, while a cartridge type oil tank 60 is housed as situated concentrically with the gas bomb 25. Moreover a square pillarlike battery 67 is set up as situated between the oil tank 60 and the starter dynamo 18, and these parts 10, 18, 67, etc., heavier in weight are placed side by side in an end at the opposite side to the handle 3.