Title:
STEEL PIPE CONNECTION STRUCTURE
Document Type and Number:
Japanese Patent JP2019085866
Kind Code:
A
Abstract:
To provide a steel pipe connection structure with high economical efficiency.SOLUTION: A radius ρ1 of a second outward angle part 32e continuous to a pin joint side non-transmission surface 32d opposite to a pin joint side transmission surface 32b in an outward groove and a radius ρ2 of curvature of a second inward angle part 42e continuous to a box joint side non-transmission surface 42d opposite to a box joint side transmission surface 42b in an inward groove 42 are larger than a radius ρ3 of curvature of a first outward angle part 32c continuous to a pin joint side transmission surface 32b transmitting a tensile load between a load transmission key 7 and the pin joint side transmission surface in the outward groove and a radius ρ4 of curvature of a first inward angle part 42c continuous to a box joint side transmission surface 42b transmitting a tensile load between the load transmission key 7 and the box joint side transmission surface in the internal groove 42.SELECTED DRAWING: Figure 2
Inventors:
SOWA AKIO
TOYAMA TADASHI
YOSHINO JUN
YAMAMOTO HIROYUKI
NAKAMURA YOSUKE
YOSHIMOTO CHIHIRO
TOYAMA TADASHI
YOSHINO JUN
YAMAMOTO HIROYUKI
NAKAMURA YOSUKE
YOSHIMOTO CHIHIRO
Application Number:
JP2018195941A
Publication Date:
June 06, 2019
Filing Date:
October 17, 2018
Export Citation:
Assignee:
KUBOTA KK
International Classes:
E02D5/24
Domestic Patent References:
| JP2004084251A | 2004-03-18 | |||
| JPS548058U | 1979-01-19 | |||
| JPWO2011049170A1 | 2013-03-14 | |||
| JP2012154048A | 2012-08-16 | |||
| JP2014173373A | 2014-09-22 | |||
| JPS54124845U | 1979-08-31 |
Foreign References:
| US4875714A | 1989-10-24 |
Attorney, Agent or Firm:
Patent business corporation r&c