JPH0486693U

JPH0486693U -

Info

Publication number: JPH0486693U
Application number: JP13138189U
Authority: JP
Priority date: 1989-11-10
Filing date: 1989-11-10
Publication date: 1992-07-28
Anticipated expiration: 2004-11-10
Also published as: JPH0754228Y2

Description

[Brief explanation of drawings]

第１図は、従来の送油ホースを内装した三段伸
縮ブームの説明図、第２図および第３図は、この
考案の送油ホースを内装した三段伸縮ブームの説
明図であつて、第２図は側面図、第３図は平面図
である。１……外側ブーム、２……中間ブーム、３……
内側ブーム、４……複動油圧シリンダー、４ａ…
…ピストンロツド、４ｂ……シリンダー、５，６
……連結、７，７ａ，７ｂ……先端側滑車、８，
１０……ワイヤーロープ、９ａ……水平支軸、９
……基端側滑車、１１……ホース案内滑車、１２
……ホース。 FIG. 1 is an explanatory diagram of a three-stage telescopic boom equipped with a conventional oil transfer hose, and FIGS. 2 and 3 are explanatory diagrams of a three-stage telescopic boom equipped with an oil supply hose according to the present invention. FIG. 2 is a side view, and FIG. 3 is a plan view. 1... Outer boom, 2... Middle boom, 3...
Inner boom, 4...Double acting hydraulic cylinder, 4a...
...Piston rod, 4b...Cylinder, 5,6
...Connection, 7, 7a, 7b...Tip side pulley, 8,
10...Wire rope, 9a...Horizontal support shaft, 9
... Proximal end pulley, 11 ... Hose guide pulley, 12
……hose.

Claims

[Scope of utility model registration request]

A three-stage telescopic boom consisting of an outer boom, an intermediate boom telescopically inserted into the outer boom, and an inner boom telescopically inserted into the intermediate boom. a double-acting hydraulic cylinder inserted between the outer boom and the intermediate boom by connecting the piston rod side end of the cylinder to the base end of the intermediate boom, and a piston rod opposite the cylinder of the double-acting hydraulic cylinder; A wire rope is suspended between the base end of the outer boom and the base end of the front boom via a front end pulley disposed at the side end, and a horizontal support shaft is connected to the base end of the intermediate boom. In the three-stage telescopic boom, the double-acting hydraulic cylinder includes a wire rope suspended between the tip end of the outer boom and the base end of the tip boom via a proximal pulley attached thereto; The tip pulley, which is disposed along the inner lower part of the three-stage telescopic boom and at the opposite end of the cylinder of the double-acting hydraulic cylinder from the piston rod, has a thickness direction that extends along the three-stage telescopic boom. By arranging it so as to face the height direction of the boom, an upper space along the three-stage telescopic boom is formed at the inner upper part of the three-stage telescopic boom, and the proximal pulley is positioned so that it is located in the upper space. The horizontal support shaft is disposed at the base end of the intermediate boom, and the hose guide pulley supported by the horizontal support shaft or a support shaft that is close to and parallel to the horizontal support shaft is connected to the upper space. A three-stage simultaneous pump equipped with an internal oil supply hose, characterized in that the oil supply hose is placed between the tip side of the outer boom and the base end side of the inner boom via the hose guide pulley. Telescopic boom.