Location History:
- Tokyo, JA (1976)
- Kamakura, JP (1978 - 1979)
Company Filing History:
Years Active: 1976-1979
Title: Innovations by Koji Nunokawa
Introduction
Koji Nunokawa is a notable inventor based in Kamakura, Japan. He has made significant contributions to the field of construction technology, particularly in methods that minimize noise and vibration during pile setting. With a total of three patents to his name, Nunokawa's work is recognized for its innovative approach to traditional construction challenges.
Latest Patents
Nunokawa's latest patents include a method of setting a pile without noise or vibration and an apparatus designed for this purpose. This invention involves erecting a hollow pile along a leader fixed to the ground, where a screw auger is inserted through the hollow center. The screw auger can move freely up and down and rotate, allowing the pile to sink by its own weight as the soil below is excavated. The apparatus features a unique design where the lower part of the screw auger is divided into inner and outer tubes, enabling relative rotation and vertical movement. This design allows for the excavation nozzles to unfold at various stages, directing fluid laterally to enlarge the hole beneath the pile.
Another significant patent by Nunokawa is a method of obtaining sufficient supporting force for a concrete pile sunk without noise or vibration. This process effectively reduces city noise by sinking a concrete pile into a leading hole while concurrently excavating it. After the pile reaches the desired depth, a supporting hole is excavated below it, and a solidifying material is poured in. This material expands within the supporting hole, permeating the loosened circumferential wall to provide adequate support.
Career Highlights
Koji Nunokawa is associated with Nippon Concrete Industries Co. Ltd., where he applies his expertise in construction technology. His innovative methods have contributed to advancements in the industry, particularly in urban environments where noise reduction is crucial.
Collaborations
Nunokawa has collaborated with notable colleagues, including Nobuyuki Abe and Osamu Watanabe. Their combined efforts have furthered the development of effective construction techniques that prioritize both efficiency and environmental considerations.
Conclusion
Koji Nunokawa's contributions to construction technology through his innovative patents demonstrate his commitment to improving industry practices. His work not only addresses practical challenges but also emphasizes the importance of reducing noise and vibration in urban settings.