JPH0353989U

JPH0353989U -

Info

Publication number: JPH0353989U
Application number: JP11496289U
Authority: JP
Priority date: 1989-09-30
Filing date: 1989-09-30
Publication date: 1991-05-24

Description

[Brief explanation of drawings]

第１図ａは本考案に係るブーム構造の縦断側面
図、第１図ｂは本考案に係るブーム構造を装備し
た多段伸縮ブームの断面図、第２図は本考案及び
従来例のブーム構造を使用したクレーン車の説明
図、第３図は従来例のブーム構造の断面図である
。１……クレーム車、１ａ……車台、２……ター
ンテーブル、３……多段伸縮ブーム、３ａ……基
部ブーム、３ｂ……中間ブーム、３ｃ……先端ブ
ーム、４……上板、５……下板、６……左右側板
、６ａ……上面折込部、６ｂ……下面折込部、７
……スライダ、Ｌ……上面折込部の折込み幅、ｌ
……下面折込部の折込み幅。 Figure 1a is a vertical side view of the boom structure according to the present invention, Figure 1b is a sectional view of a multi-stage telescopic boom equipped with the boom structure according to the present invention, and Figure 2 shows the boom structure of the present invention and the conventional example. FIG. 3, which is an explanatory diagram of the crane vehicle used, is a sectional view of a conventional boom structure. 1... Complaint vehicle, 1a... Chassis, 2... Turntable, 3... Multistage telescopic boom, 3a... Base boom, 3b... Intermediate boom, 3c... Tip boom, 4... Top plate, 5... ...Lower plate, 6...Left and right side plates, 6a...Top folded part, 6b...Bottom folded part, 7
...Slider, L...Folding width of top folding part, l
...Folding width of the bottom folding part.

Claims

[Scope of utility model registration request]

In a boom structure in which the upper and lower sides of a boom with a square cross section consisting of an upper plate, a lower plate, and left and right side plates are bent inward, the lower bending width is larger than the upper bending width. A boom structure characterized by a short structure.