Title:
TELESCOPIC JIB OF MOBILE CRANE
Document Type and Number:
Japanese Patent JP2022077506
Kind Code:
A
Abstract:
To provide a telescopic jib capable of being unlocked easily in an emergency.SOLUTION: The present invention relates to a telescopic jib (1) of a mobile crane having a basic box (10) and a plurality of inner boxes (20, 30, 40). The plurality of inner boxes (20, 30, 40) can be extended from retraction positions (A) to extension positions (B, C, D), respectively, and can be locked and unlocked together at the respective retraction positions (A) or the extension positions (B, C, D) by bolting holes (12, 22, 32) arranged in the basic and inner boxes (10, 20, 30, 40), and related lock bolts (21, 31, 41). It is proposed that the bolting holes (12, 22, 32) for the extension positions (B, C, D) are aligned with each other at the retraction positions (A) of the basic and inner boxes (10, 20, 30, 40), in order to provide the telescopic jib (1) of the mobile crane capable of being unlocked easily in an emergency.SELECTED DRAWING: Figure 4
Inventors:
SIMON SCHNEIDER
Application Number:
JP2021180040A
Publication Date:
May 23, 2022
Filing Date:
November 04, 2021
Export Citation:
Assignee:
TADANO DEMAG GMBH
International Classes:
B66C23/693
Attorney, Agent or Firm:
Hiroyuki Hirose
Daisuke Seki
Daisuke Seki
Previous Patent: Method for Producing Carboxylate, Resist Composition and Resist Pattern
Next Patent: Core sheath composite fiber
Next Patent: Core sheath composite fiber