JPH0341787U

JPH0341787U -

Info

Publication number: JPH0341787U
Application number: JP10226089U
Authority: JP
Priority date: 1989-08-31
Filing date: 1989-08-31
Publication date: 1991-04-22

Description

[Brief explanation of drawings]

第１図ａ，ｂは本考案に係るクレーン車のブー
ムヘツド装置のそれぞれサブブーム使用状態の概
略説明図、ブーム使用状態の概略説明図、第２図
ａ，ｂ，ｃは本考案に係るクレーン車のブームヘ
ツド装置の要部拡大側面図、同・正面図、及びサ
ブブームの伸長した状態の同・側面図、第３図は
本考案及び従来例を装備して用いられるクレーン
車のブームの全伸長状態の説明図、第４図は従来
例におけるブームを略直立状態で使用した場合の
概略説明図である。１……クレーン車、１ａ……車台、２……ター
ンテーブル、３……多段式ブーム、４……先端ブ
ーム、４ａ……ブームヘツド受け部、４ｂ……メ
インフツク、５……サブブーム、５ａ……ブーム
ヘツド受け部、５ｂ……サブフツク、６……ブー
ムヘツド、６ａ……ブームヘツドカバー、６ｂ…
…シーブ、６ｃ……ピン穴、６ｄ……切り欠き穴
、７……固定ピン、８……シリンダー、９……ワ
イヤ、Ｃ……吊り荷、Ｘ……空間部分。 Figures 1a and b are schematic explanatory diagrams of the boom head device of the crane vehicle according to the present invention in the sub-boom usage state and the boom usage state, respectively, and Figures 2a, b, and c are the schematic explanatory diagrams of the boom head device of the crane vehicle according to the present invention. An enlarged side view of the main part of the boom head device, a front view thereof, and a side view of the sub-boom in the extended state, and FIG. The explanatory diagram, FIG. 4, is a schematic explanatory diagram when the boom in the conventional example is used in a substantially upright state. 1... Crane truck, 1a... Chassis, 2... Turntable, 3... Multi-stage boom, 4... Tip boom, 4a... Boom head receiver, 4b... Main hook, 5... Sub-boom, 5a... Boom head receiving part, 5b...Sub hook, 6...Boom head, 6a...Boom head cover, 6b...
...Sheave, 6c...Pin hole, 6d...Notch hole, 7...Fixing pin, 8...Cylinder, 9...Wire, C...Hanging load, X...Space part.

Claims

[Scope of utility model registration request]

In a boom head device for a crane vehicle in which a sub-boom is built in the boom in a telescopic manner, one boom head having a sheave for passing a wire around can be selectively attached to and detached from the tip of the boom and the tip of the sub-boom. A boom head device for a crane vehicle, characterized by: