JPS62183696U

JPS62183696U -

Info

Publication number: JPS62183696U
Application number: JP7113586U
Authority: JP
Priority date: 1986-05-12
Filing date: 1986-05-12
Publication date: 1987-11-21

Description

[Brief explanation of the drawing]

第１図は本考案の実施例にかかるクレーンの走
行姿勢での全体側面図、第２図は同クレーン作業
姿勢での全体側面図、第３図は第２図―線拡
大断面図、第４図は同―線拡大断面図である
。２…上部旋回体、３…ブーム、４…ブーム起伏
シリンダ、５…ブームフツトピン、２１…ブーム
フツトピンガイドレール、２２…ブームレスト、
７…ブームフツトピンを前進位置で固定する油圧
シリンダ、７１…同ピン、６…スライドフレーム
、９…同フレーム固定用シリンダ、９１…同ロツ
ド、３３，３４…同固定孔。 Fig. 1 is an overall side view of a crane according to an embodiment of the present invention in a running position, Fig. 2 is an overall side view of the same crane in a working position, Fig. 3 is an enlarged cross-sectional view along the lines of Fig. 2, and Fig. 4 is an overall side view of the crane in a running position. The figure is an enlarged sectional view along the same line. 2... Upper revolving structure, 3... Boom, 4... Boom hoisting cylinder, 5... Boom foot pin, 21... Boom foot pin guide rail, 22... Boom rest,
7... Hydraulic cylinder for fixing the boom foot pin in the forward position, 71... Same pin, 6... Slide frame, 9... Same frame fixing cylinder, 91... Same rod, 33, 34... Same fixing hole.

Claims

[Scope of utility model registration request]

In a mobile crane in which the upper rotating body is provided with a boom that can be raised and lowered around a boom foot pin, and a boom hoisting cylinder is provided between the boom and the upper rotating body, the boom is installed at the rear of the upper rotating body. A foot pin guide rail is provided in the front-back direction, and the boom foot pin is engaged with the boom foot pin guide rail so as to be slidable back and forth between a forward position during crane work and a backward position during traveling, The boom is supported with respect to the upper revolving structure so as to be able to slide back and forth with the boom foot pin, while a slide frame is provided on the underside of the boom with the same stroke as the forward and backward movement stroke of the boom foot pin when the boom is traveling. a boom foot that is mounted so as to be slidable back and forth between a forward position and a backward position during crane work, has one end of the boom hoisting cylinder attached to the slide frame, and fixes the boom foot pin in the forward position; A mobile crane comprising: a pin fixing means; and a slide frame fixing means for fixing the slide frame in the forward position and the backward position.