JPH0237186U

JPH0237186U -

Info

Publication number: JPH0237186U
Application number: JP11518788U
Authority: JP
Priority date: 1988-08-31
Filing date: 1988-08-31
Publication date: 1990-03-12
Anticipated expiration: 2003-08-31
Also published as: JPH0636051Y2

Description

[Brief explanation of drawings]

第１図は、本考案の伸縮ブーム・ジブ集合体の
側面図、第２図は第１図の平面図である。第３図
は、本考案の伸縮ブーム・ジブ集合体の他の実施
例の側面図、第４図〜第６図は従来の伸縮ブーム
・ジブ集合体の説明図であつて、第４図は側面図
、第５図は第４図の平面図、第６図は他の従来例
の側面図である。 FIG. 1 is a side view of the telescopic boom/jib assembly of the present invention, and FIG. 2 is a plan view of FIG. 1. FIG. 3 is a side view of another embodiment of the telescopic boom/jib assembly of the present invention, and FIGS. 4 to 6 are explanatory diagrams of the conventional telescopic boom/jib assembly. 5 is a plan view of FIG. 4, and FIG. 6 is a side view of another conventional example.

Claims

[Scope of utility model registration request]

The boom section on the distal end is telescopically inserted into the boom section on the proximal end in order, and the boom section on the proximal end is attached to a swivel platform mounted on the vehicle so as to be freely undulating. A telescopic boom having a gooseneck portion with a pulley at the tip of the boom section on the distal end side, in particular, a wire robe pulled out from a winch provided on the swivel base is placed under the telescopic boom and then to the pulley of the gooseneck portion. A telescopic boom/jib consisting of a telescopic boom that is pulled out from the tip of the telescopic boom via a wire rope and a hook suspended from the tip of the telescopic boom by the drawn-out wire rope, and a jib that is removably attached to the telescopic boom. In the assembly, a cylindrical jib holder with a hollow rectangular cross section is attached to one side of the distal end of the most advanced boom section, and at least the base end of the jib is removably fitted into the jib holder. The jib body is composed of a rod-shaped body configured to have a rectangular outer shape, and a jib tip pulley disposed at the tip of the jib body so as to be located on the other side of the jib body. The jib holder is configured such that when the base end of the jib body is fitted into the jib holder, the amount of downward deviation of the pulley at the end of the jib with respect to the telescopic axis of the telescopic boom is such that the pulley of the gooseneck portion is offset downward relative to the telescopic axis of the telescopic boom. A telescoping boom/jib assembly, characterized in that it is attached to the tip of the most advanced boom section so that the bias is greater than the amount of deviation from the boom section.