The present invention relates to a method to manufacture a ladder, capable of realizing a compact ladder, and a manufacturing method thereof. According to the present invention, the method to manufacture a ladder comprises: a transferring device (2) to longitudinally transfer a temporarily assembled ladder (KW) temporarily attaching a plurality of side plates (WA) facing each other and a plurality of angled members (WB) disposed between the side plates (WA); a welding unit disposed on a transfer line; a positioning clamp device (5) to hold and support the angled member (WB) of the temporarily assembled ladder (KW) on a welding position; and a holder device (6) to fix the temporarily assembled ladder (KW) when the angled member (WB) is held and supported. The welding unit (3) comprises: two pairs of lower welding torches (31) to weld the angled member (WB) inserting one end part (WBe) into an angled hole (WAh) of a lower side plate (WAL) to the lower side plate (WAL) from an inner surface (WAi) side, and both inner and outer sides of the temporarily assembled ladder (KW); and a pair of upper welding torches (32) to weld the angled member (WB) inserting one end part (WBe) into an angled hole (WAh) of an upper side plate (AWU) to the upper side plate (AWU) from an outer surface (WAo) side.

    서로 대향하는 한 쌍의 측판(WA, WA)과, 측판(WA, WA) 사이에 복수 배치되는 각재(WB)를 가부착하여 이루어지는 가조립 사다리(KW)를 길이 방향으로 이동시키는 이송기구(2)와, 이동 라인 상에 배치된 용접부(3)와, 가조립 사다리(KW)의 각재(WB)를 용접 위치에서 보유지지하는 위치 결정 클램프 기구(5)와, 각재(WB)의 보유지지가 이루어진 상태에서 가조립 사다리(KW)을 고정하는 홀더 기구(6)를 구비하고, 용접부(3)에는, 하방의 측판(WAL)의 각구멍(WAh)에 일단부(WBe)를 삽입한 각재(WB)를 하방의 측판(WAL)에 대하여 그 내향면(WAi)측에서 또한 가조립 사다리(KW)의 표리 양측으로부터 용접하는 2조의 하측 용접 토치(31)와, 상방의 측판(WAU)의 각구멍(WAh)에 일단부(WBe)를 삽입한 각재(WB)를 상방의 측판(WAU)에 대하여 그 외향면(WAo)측으로부터 용접하는 1조의 상측 용접 토치(32)가 배치되어 있다.


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    Titel :

    Ladder manufacturing device and method


    Weitere Titelangaben:

    사다리 제조 장치 및 사다리 제조 방법


    Beteiligte:

    Erscheinungsdatum :

    2018-09-05


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    B23K Löten , SOLDERING OR UNSOLDERING / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS



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