Koki Holdings Co., Ltd.

Yuki Mitoma

Toshinori Yasutomi

Kazuhiko Funabashi

Hironori Mashiko

Shinichirou Satou

A driver capable of achieving favorable workmanship at the time of driving of a fastener into a workpiece to be driven is provided. In a driver having a striking unit; a first bias unit causing the striking unit to strike a fastener; a first operational unit and a second operational unit, and a control unit moving the striking unit in a first direction, the control unit can select a first driving mode, a second driving mode and a limitation mode, the first driving mode moving the striking unit in the first direction so that the fastener is struck when the first operational unit is operated after the second operational unit is pressed against the workpiece to be driven, the second driving mode moving the striking unit in the first direction so that the fastener is struck when the control unit detects the operation of the first operational unit and the pressing of the second operational unit against the workpiece to be driven, and the limitation mode limiting the second driving mode on the basis of a movement state of the striking unit.

Driver

To provide a driver that can be reduced in the amount of gas to be injected into a pressure chamber. The driver has: an impactor configured to hit a stopper by moving from a first position toward a second position; a pressure chamber to be filled with gas for moving the impactor from the first position toward the second position; a control mechanism configured to move the impactor from the second position toward the first position; and a gas injection portion configured to inject gas into the pressure chamber, wherein the impactor is capable of taking a standby position between the second position and the first position, and the control mechanism is configured to stop the impactor at an adjustment position closer to the second position than the standby position before gas is injected into the pressure chamber.

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Ibaraki, Japan

Yuki Mitoma