Title:
型枠専用釘
Document Type and Number:
Japanese Patent JP6868324
Kind Code:
B2
Abstract:
[Problem] There are a 45 mm-long nail (N45) and a 65 mm-long nail (N65) which are mainly used for formwork in the construction business; however, when heading is performed with a conventional smooth nail during form buildup in consideration of form demolition after concrete placement, a process for making close contact between plywood and crosspieces and between crosspieces is required. In addition, it is difficult to extract the nails during form demolition. [Solution] Due to a slight step and a tapered structure which are formed on the neck section of this form-dedicated nail, the nail can be simply driven, and a process accompanying the heading of the nail is not required. In addition, when a form is worked with this form-dedicated nail, it is possible to remarkably shorten the time for nail extraction during form demolition. Furthermore, it is most preferable to combine form-dedicated nails of a derivative form and a nail driver during formwork.
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Inventors:
Seizo Nakajima
Application Number:
JP2019177939A
Publication Date:
May 12, 2021
Filing Date:
September 08, 2019
Export Citation:
Assignee:
Seizo Nakajima
International Classes:
E04G17/02; F16B15/00
Domestic Patent References:
| JP50032029A | ||||
| JP3130413U | ||||
| JP59037410U | ||||
| JP9324811A |
Foreign References:
| US20180172058 |