JPH045476U

JPH045476U -

Info

Publication number: JPH045476U
Application number: JP4480490U
Authority: JP
Priority date: 1990-04-25
Filing date: 1990-04-25
Publication date: 1992-01-20
Anticipated expiration: 2005-04-25
Also published as: JP2507256Y2

Description

[Brief explanation of the drawing]

第１図は、本考案の折り曲げブームの折り畳み
状態の側面図、第２図は第１図のＡ−Ａ断面図、
第３図は、従来の折り曲げブームの折り畳み状態
の側面図、第４図は第３図のＢ−Ｂ断面図である
。基端側ブーム……１、先端側ブーム……２、第
一リンク……６、第二リンク……７、起伏シリン
ダ……９、面取り部……１ｂ，２ｂ。 Fig. 1 is a side view of the folding boom of the present invention in a folded state, Fig. 2 is a sectional view taken along line A-A in Fig. 1,
FIG. 3 is a side view of a conventional folding boom in a folded state, and FIG. 4 is a sectional view taken along line BB in FIG. 3. Proximal boom...1, distal boom...2, first link...6, second link...7, undulation cylinder...9, chamfered portion...1b, 2b.

Claims

[Scope of Claim for Utility Model Registration] A distal boom is provided at the distal end of the proximal boom 1 so that the distal boom 2 can be raised and lowered between a folded state in which the distal boom 2 is substantially parallel to the proximal boom 1 and an extended state in which it is extended. 2 are pivotally connected 3 so that they can be raised and lowered, and their base ends are pivotally connected 4 and 5 to the tip of the proximal boom 1 and the proximal ends of 2 of the distal boom 2, respectively. 6 and 7, the proximal boom 1
and are arranged on the left and right sides of the tip side boom 2, respectively, and the tips of the left and right first and second links 6, 7 are pivotally connected 8 in the space on the folding side, and the left and right positions near the tip of the tip side boom 2 are arranged. The distal ends of a pair of left and right undulation cylinders 9, 9 whose base ends are connected to the respective distal ends of the left and right first or second links are connected to the respective distal ends of the left and right first or second links, and these pair of left and right undulation cylinders 9,
9 is a folding boom configured to drive the distal end boom 2 up and down, wherein chamfered portions are formed at the left and right end portions of each opposing surface of the base end boom and the distal end boom in the folded state, and The folding boom is characterized in that the left and right undulating cylinders are configured such that their axes are substantially parallel to the axis of the distal boom, and at least a portion thereof is located between the opposing chamfered portions.