| 摘要 |
A drive machine includes a housing; a motor disposed in the housing; a magazine which is attached to the housing and supplies a nail to a drive position; a plunger for driving the nail; a spring which impels and accelerates the plunger to the drive position by elastic force; and a chain which is driven by the motor, to thus accumulate elastic energy in the spring. The chain has a projection which provides a first state where elastic energy is accumulated in the spring and a second state where the accumulated elastic energy is released.
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