Title:
CONSTRUCTION METHOD FOR VENTILATION DUCT AND VENTILATION STRUCTURE
Document Type and Number:
Japanese Patent JP2021121775
Kind Code:
A
Abstract:
To provide a construction method for a ventilation duct capable of closing a gap formed between an inner peripheral surface of a ceiling surface material or an inner peripheral surface of a wall surface material forming a duct insertion hole and the ventilation duct even in a case where construction from an outer peripheral surface side to the ventilation duct is difficult, and a ventilation structure.SOLUTION: The present invention relates to the construction method for a ventilation duct including: a step of preparing a ventilation duct 10; a duct positioning step of positioning the ventilation duct in a state where the ventilation duct 10 is inserted into a first duct insertion hole H1 formed on a ceiling surface material 31 or a wall surface material in such a manner that a position of a diameter enlarging part 14 is overlapped with a position of the first duct insertion hole H1 in a duct axial direction; and a duct diameter enlarging step of enlarging a diameter of the diameter enlarging part 14 from a flow passage at the side of an inner peripheral surface after the duct positioning step, such that an outer peripheral surface 14s of the diameter enlarging part is brought into contact with an inner peripheral surface 38n of the ceiling surface material 31 or an inner peripheral surface of the wall surface material defining the first duct insertion hole H1 and a contact state is maintained.SELECTED DRAWING: Figure 1
Inventors:
HANIBUCHI HARUO
OKUMURA YOSHINORI
YAMADA NOZOMI
HARADA TOSHIAKI
OKUMURA YOSHINORI
YAMADA NOZOMI
HARADA TOSHIAKI
Application Number:
JP2020015016A
Publication Date:
August 26, 2021
Filing Date:
January 31, 2020
Export Citation:
Assignee:
SEKISUI HOUSE KK
International Classes:
F24F13/02
Domestic Patent References:
| JPH11182905A | 1999-07-06 | |||
| JPS63125882A | 1988-05-30 | |||
| JPH10238848A | 1998-09-08 | |||
| JPH02106652A | 1990-04-18 | |||
| JP2012087513A | 2012-05-10 |
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Atsushi Yamamoto
Masataka Otani
Atsushi Yamamoto