| 摘要 |
<p>PURPOSE: To provide a saw whose two blades are not detachable during the use thereof by equipping the saw with a reciprocator to reversely reciprocate two paralleled blades to the elongated direction and a generator to generate a force to integrally press the blades at its tooth section. CONSTITUTION: When an armature axis 11 is driven by a motor 10, a gear 24 is rotated via a pinion 12 by which a cutting tool holder 15 for a blade 7' is moved to the left from the outside right position and a cutting tool holder 18 for a blade 7' position, to the right from the outside left position. That is, the cutting tool holders 15 and 18 reciprocate reversely. When the teeth 46, 47 and 50 for a blade are geared with the work piece, the blade is pushed toward a support plate 6. However, the blade' s displacement to the support plate 6 is protected by the blade-elongated shoulder sections 51 and 52. The support sections 53 and 54 apply the downward supporting forces to the elongated shoulder sections 51 and 52, and said forces become a torque to integrally press the blade at the lower section region with the teeth thereof, the saw teeth 50 being pressed each other.</p> |
