| US 7,578,420 B2 | ||
| Chain or belt driven fastener machine | ||
| Hideyuki Tanimoto, Ibaraki (Japan); Toshihito Sakaba, Ibaraki (Japan); Hiroyuki Oda, Ibaraki (Japan); Takashi Ueda, Ibaraki (Japan); and Yoshihiro Nakano, Ibaraki (Japan) | ||
| Assigned to Hitachi koki Co., Ltd., Tokyo (Japan) | ||
| Filed on Jul. 02, 2007, as Appl. No. 11/772,484. | ||
| Claims priority of application No. P2006-185090 (JP), filed on Jul. 05, 2006. | ||
| Prior Publication US 2008/0006672 A1, Jan. 10, 2008 | ||
| Int. Cl. B27F 7/02 (2006.01) | ||
| U.S. Cl. 227—132 [227/146] | 14 Claims |
| 1. A drive machine comprising:
a housing;
a motor disposed in the housing;
a magazine being attached to the housing, the magazine supplying a nail to a drive position;
a plunger driving the nail;
an elastic element that impels and accelerates the plunger to the drive position by elastic force;
a chain, disposed in the housing and extending in a direction parallel with the longitudinal axis of the plunger, being driven
by the motor and being movable from a first position to a second position; and
an engagement member, provided on the chain, to engage with the plunger or the elastic element at the first position and to
disengage with the plunger or the elastic element at the second position,
wherein elastic energy is accumulated in the elastic element when the engagement member moves from the first position to the
second position.
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