Title:
THROUGH-HOLE FORMING TOOL AND THROUGH-HOLE FORMING METHOD
Document Type and Number:
Japanese Patent JP2020020214
Kind Code:
A
Abstract:
To provide a through-hole forming tool capable of forming a well-drained through-hole inside a concrete foundation, and a through-hole forming method using the through-hole forming tool.SOLUTION: The present invention is a through-hole forming tool 10 for forming a through-hole 30 in a bottom 2 of a concrete foundation 1 of a building, and a through-hole forming method using the through-hole forming tool 10. The through-hole forming tool 10 includes a cylindrical or solid rod-shaped main body 11 having a closed end 11a at least at one end 11a. The main body 11 has a length extending from an upper end surface 2a of the bottom 2 to an outer peripheral surface 1a of the underground portion of the concrete foundation 1, and the cross-sectional area of the closed one end 11a has a tapered shape larger than the cross-sectional area of the other end 11b. The through-hole forming method includes the steps of inserting the through-hole forming tool 10 into the concrete foundation 1 before the concrete starts to harden, and extruding the through-hole forming tool 10 from the concrete foundation 1 after the concrete hardens.SELECTED DRAWING: Figure 1
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Inventors:
KAWAMOTO YOSHIHIRO
Application Number:
JP2018146341A
Publication Date:
February 06, 2020
Filing Date:
August 02, 2018
Export Citation:
Assignee:
KAWAMOTO YOSHIHIRO
International Classes:
E04G15/06; E02D27/01
Attorney, Agent or Firm:
Yoshitaka Fukushima