Title:
電動ドライバーにより長さが調節可能な自動はしご
Document Type and Number:
Japanese Patent JP6894524
Kind Code:
B2
Abstract:
According to the present invention, a ladder having an adjustable length comprises: a first support including a first outer support and a first inner support inserted into the first outer support; a horizontal foothold for connecting the first supports to each other; a first gear formed at the inner side of the horizontal foothold and having a groove part formed therein; a second gear engaging with the first gear and changing the rotational direction of the first gear; a rotary bar coupled to the second gear; a third gear formed at the end of one side of the rotary bar; a screw bolt having a fourth gear, which engages with the third gear and is formed at the end thereof, formed inside the first inner support, formed in a stick type, and having threads formed on the outer side thereof; and a screw nut in which the screw bolt is formed, and to which the first inner support is coupled at the outer side thereof.
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Inventors:
SEO, Dong Yeong
Application Number:
JP2019545218A
Publication Date:
June 30, 2021
Filing Date:
October 31, 2017
Export Citation:
Assignee:
SEO, Dong Yeong
International Classes:
E06C1/22; E06C7/04
Foreign References:
| CN202417284U | ||||
| CN106050119A | ||||
| US8011473 | ||||
| US2880920 |
Attorney, Agent or Firm:
sk patent corporation
Akihiko Okuno
Hiroyuki Ito
Akihiko Okuno
Hiroyuki Ito