JPS59100791U

JPS59100791U - Boom with folding jib

Info

Publication number: JPS59100791U
Application number: JP20111382U
Authority: JP
Inventors: 川本　博; 谷本　朝雄
Original assignee: 株式会社多田野鉄工所
Priority date: 1982-12-24
Filing date: 1982-12-24
Publication date: 1984-07-07
Also published as: JPS6348628Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本出願人の既出願に係る折たたみジブ付きブー
ムにおける下振り出し時の作用説明図、第２図は本考案
の実施例にかかる折たたみジブ付きブームの斜視図、第
３図は第２図の折たたみジブ付きブームにおけるジブ枢
着部分の拡大分解斜視図、第４図は第２図のジブ枢着部
分の縦断面図、第５図は第４図の■−■断面図、第６図
は第５図の状態からブームが立起されたときの断面図、
第７図ないし第１０図はそれぞれ第２図の折たたみジブ
付きブー・ムの下振り出し時の作用説明図である。１・・・・・・ブーム、２・・・・・・ジブ、２ａ・・
・・・・ジブ基端、１０・・・・・・ブーム先端、１０
ａ・・・・・・ブーム先端側部、１９・・・・・・外筒
、２０・・・・・・回転軸、２１・・・・・・連結部材
、２２・・・・・・横向きブラケット部、２３・・・・
・・縦向きブラケット部、３０・・・・・・水平姿勢保
持手段、３１・・・・・・切欠溝、３２・・・・・・突
起。Fig. 1 is an explanatory view of the operation of a boom with a folding jib according to a previous application of the present applicant during downward swinging, Fig. 2 is a perspective view of a boom with a folding jib according to an embodiment of the present invention, and Fig. 3 is a Figure 2 is an enlarged exploded perspective view of the jib pivot portion of the boom with a folding jib, Figure 4 is a longitudinal cross-sectional view of the jib pivot portion in Figure 2, and Figure 5 is a cross-sectional view taken along ■-■ in Figure 4. , Fig. 6 is a cross-sectional view when the boom is raised from the state shown in Fig. 5;
7 to 10 are explanatory views of the operation of the boom with folding jib shown in FIG. 2 when the boom is swung downwards. 1...Boom, 2...Jib, 2a...
...Jib base end, 10...Boom tip, 10
a...Boom tip side, 19...Outer cylinder, 20...Rotating shaft, 21...Connection member, 22...Sideways Bracket part, 23...
...Vertical bracket portion, 30...Horizontal posture holding means, 31...Notch groove, 32...Protrusion.

Claims

[Scope of utility model registration request]

When attaching the jib 2 to the boom head 10 or storing it on the side of the boom, the jib 2 may be swung sideways (7) or the jib 2 may be swung downward once and then rotated to the mounting or storage position. A boom with a folding jib, which allows the jib 2 to be rotated within an angular range of about 180° from the side to the front of the boom 1 by either of the following methods:
A rotating shaft 20 with the axis Q-Q oriented horizontally is attached to the side 10a of the boom head 10, and the base end 2a of the jib 2 is attached so that the jib 2 is aligned with the vertical axis when the jib 2 is in a suspended state. A boom with a folding jib, characterized in that the boom is connected to the rotating shaft 20 via a connecting member 21 that is rotatable.