LATERAL REINFORCEMENT TYPE BOOM FOR LADDER TRUCK

WIPO Patent Application WO/2022/114850

A1

The present invention relates to a lateral reinforcement type boom for a ladder truck, the boom comprising: a main boom (11) which is rotatably installed in a vehicle (10) and extends such that multistage protraction/retraction is possible; and auxiliary booms (13) which are coupled to each of opposite side surfaces in a transverse direction of the main boom (11) such that multistage protraction/retraction is possible, therefore since the main boom can be reinforced by the auxiliary boom at opposite sides, the overall bending strength of the boom and the strength against lateral load can be further improved. In addition, an extension ladder which is mounted on the lower end of the main boom to be relatively movable along the main boom so as to extend to the ground when the ladder truck is in operation so that a carriage of the ladder truck can descend to the ground, and thus the extension ladder is coupled to an upper surface on a lower end of the main boom in which the auxiliary booms for reinforcement are coupled to opposite side surface thereof such that the extension ladder can relatively move to extend to the ground. Therefore, the carriage moving on the boom is lowered close to the ground by using the extension ladder so that luggage can be easily moved up and down to the carriage.

JPH10194691	BALANCER DEVICE
JPS6357497	ROBOT FOR HOT-LINE WORK

LIM DAE WOO (KR)

PCT/KR2021/017629

June 02, 2022

November 26, 2021

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LIM DAE WOO (KR)
AN JANG SOOK (KR)

B66F11/04; B66F17/00

KR20170080758A	2017-07-11
KR200258475Y1	2001-12-28
KR101955929B1	2019-03-08
KR200331396Y1	2003-10-30
KR102146714B1	2020-08-21
JP2003176100A	2003-06-24
US4640383A	1987-02-03
KR102275660B1	2021-07-09
US10763649B2	2020-09-01
KR940022909U	1994-10-20

KO, Kwang Ok (KR)

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