JPS5856786U - Multistage beam expansion and contraction device - Google Patents

Multistage beam expansion and contraction device

Info

Publication number
JPS5856786U
JPS5856786U JP15197481U JP15197481U JPS5856786U JP S5856786 U JPS5856786 U JP S5856786U JP 15197481 U JP15197481 U JP 15197481U JP 15197481 U JP15197481 U JP 15197481U JP S5856786 U JPS5856786 U JP S5856786U
Authority
JP
Japan
Prior art keywords
oil chamber
side oil
piston
piston rod
cylinder unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15197481U
Other languages
Japanese (ja)
Inventor
周二 片山
Original Assignee
株式会社　多田野鉄工所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社　多田野鉄工所 filed Critical 株式会社　多田野鉄工所
Priority to JP15197481U priority Critical patent/JPS5856786U/en
Publication of JPS5856786U publication Critical patent/JPS5856786U/en
Pending legal-status Critical Current

Links

Landscapes

  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Jib Cranes (AREA)

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

【図面の簡単な説明】[Brief explanation of drawings]

第１図は各ビーム間摩擦抵抗の関係を説明する為のクレ
ーンブームを例にとった多段ビーム断面図、第２図は本
考案実施例の全縮小状態の断面図、第３図は同全伸状態
の断面図である。Fig. 1 is a cross-sectional view of a multi-stage beam using a crane boom as an example to explain the relationship of frictional resistance between each beam, Fig. 2 is a cross-sectional view of the embodiment of the present invention in a fully reduced state, and Fig. 3 is a cross-sectional view of the same structure. FIG. 3 is a cross-sectional view in a stretched state.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ３個以上のビーム筒よりなる多碌ビームにおいて、基端
側ビーム番とピストンロッドを、中間ビームにシリンダ
を夫々連結して配設した第１シリンダユニツト、中間ビ
ームにシ、リングを、先端側ビームにピストンロッドを
連結して配設した第２シリンダユニツト、第１シリンダ
ユニツトのピストン側油室と第２シリンダユニツトのピ
ストン側油室とを接続するピストン側油室連給油路、第
１シリンダユニツトのピストンロッド側油室と第２シリ
ンダユニツトのピストンロッド側油室とを８するピスト
ンロッド側油室連結油路、第１シリンダユニツトのピス
トン側油室とピストンロッド側油室の双方に夫々接続し
た作動油給排油路からなり、前記ピストン側油室連給油
路には第１シリンダユニツトの全伸長状態で開路するシ
ーケンス弁ヲ設け、第２シリンダユニツトのピストンの
ビス′トンロッド側受圧面積は第１シリンダユニツトの
ピストンのピストンロッド側受圧面積よりも大にしであ
ることを特徴とする伸縮ユニットを備えた多段ビームの
伸縮装置。In a multi-beam consisting of three or more beam tubes, the first cylinder unit has a beam number and a piston rod on the proximal end, a cylinder is connected to the intermediate beam, a cylinder is connected to the intermediate beam, and a ring is connected to the distal end. A second cylinder unit in which a piston rod is connected to the beam, a piston-side oil chamber connection oil supply passage connecting the piston-side oil chamber of the first cylinder unit and the piston-side oil chamber of the second cylinder unit, and the first cylinder. A piston rod side oil chamber connecting oil passage connecting the piston rod side oil chamber of the unit and the piston rod side oil chamber of the second cylinder unit, and a piston rod side oil chamber connecting oil chamber to both the piston side oil chamber and the piston rod side oil chamber of the first cylinder unit, respectively. The hydraulic oil supply and drain passages are connected to each other, and the piston-side oil chamber-connected oil supply passage is provided with a sequence valve that opens when the first cylinder unit is fully extended. A multi-stage beam telescoping device equipped with a telescoping unit, characterized in that the area is larger than the pressure receiving area on the piston rod side of the piston of the first cylinder unit.
JP15197481U 1981-10-12 1981-10-12 Multistage beam expansion and contraction device Pending JPS5856786U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15197481U JPS5856786U (en) 1981-10-12 1981-10-12 Multistage beam expansion and contraction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15197481U JPS5856786U (en) 1981-10-12 1981-10-12 Multistage beam expansion and contraction device

Publications (1)

Publication Number Publication Date
JPS5856786U true JPS5856786U (en) 1983-04-18

Family

ID=29944642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15197481U Pending JPS5856786U (en) 1981-10-12 1981-10-12 Multistage beam expansion and contraction device

Country Status (1)

Country Link
JP (1) JPS5856786U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019116190A (en) * 2017-12-27 2019-07-18 極東開発工業株式会社 Outrigger device of work vehicle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56124708A (en) * 1980-03-06 1981-09-30 Tadano Tekkosho:Kk Oil pressure cylinder device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56124708A (en) * 1980-03-06 1981-09-30 Tadano Tekkosho:Kk Oil pressure cylinder device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019116190A (en) * 2017-12-27 2019-07-18 極東開発工業株式会社 Outrigger device of work vehicle
JP2022002958A (en) * 2017-12-27 2022-01-11 極東開発工業株式会社 Outrigger device of service vehicle

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