JPS6023194U - Boom extension device for cranes - Google Patents

Boom extension device for cranes

Info

Publication number
JPS6023194U
JPS6023194U JP11410283U JP11410283U JPS6023194U JP S6023194 U JPS6023194 U JP S6023194U JP 11410283 U JP11410283 U JP 11410283U JP 11410283 U JP11410283 U JP 11410283U JP S6023194 U JPS6023194 U JP S6023194U
Authority
JP
Japan
Prior art keywords
boom
cranes
installed inside
chain
extension device
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
JP11410283U
Other languages
Japanese (ja)
Inventor
友枝　完之
Original Assignee
株式会社　南星
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　南星 filed Critical 株式会社　南星
Priority to JP11410283U priority Critical patent/JPS6023194U/en
Publication of JPS6023194U publication Critical patent/JPS6023194U/en
Pending legal-status Critical Current

Links

Landscapes

  • 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 the drawing]

第１図は本考案の縮少時の断面図、第２図は同じく伸長
時の断面図を示す。 １・・・第１ブーム、２・・・第２ブーム、３・・・第
３ブーム、４・・・油圧シリンダー、５・・・メインア
ーム、８ａ、８ｂ・・・スプロケットホイール、９・・
・無端チェー７．１Ｇ・・・固定アーム、１１・・・ジ
ヨイント、１２・・・ピン、１３・・・ジヨイント、１
４・・・ピン。FIG. 1 is a sectional view of the present invention when it is contracted, and FIG. 2 is a sectional view of the invention when it is expanded. DESCRIPTION OF SYMBOLS 1... First boom, 2... Second boom, 3... Third boom, 4... Hydraulic cylinder, 5... Main arm, 8a, 8b... Sprocket wheel, 9...
・Endless chain 7.1G...Fixed arm, 11...Joint, 12...Pin, 13...Joint, 1
4...Pin.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 第１ブーム内に第２ブーム、第２ブーム内に第３ブーム
を夫々設け、第２ブームが伸縮しうるように第１ブーム
との間に油圧シリンダーを取付け、第３ブーム内に配し
たメインアームの基端を第２ブームに連結すると共に、
該メインアームの両端に各々枢着したスプロケットホイ
ールに無端チェーンを張設し、チェーンと第３ブームの
基端とを連結する一方、該チェーンの反対位置と第１ブ
ームより延設した固定アームとを連結してなることを特
徴とするクレーンにおけるブーム伸縮装置。A second boom is installed inside the first boom, and a third boom is installed inside the second boom. A hydraulic cylinder is installed between the second boom and the first boom so that the second boom can expand and contract, and the main boom is installed inside the third boom. Connecting the base end of the arm to the second boom,
An endless chain is stretched around sprocket wheels pivotally connected to both ends of the main arm, and the chain is connected to the base end of the third boom, while a fixed arm extending from the first boom is connected to the opposite position of the chain. A boom extension/retraction device for a crane, characterized in that it is made by connecting two.
JP11410283U 1983-07-22 1983-07-22 Boom extension device for cranes Pending JPS6023194U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11410283U JPS6023194U (en) 1983-07-22 1983-07-22 Boom extension device for cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11410283U JPS6023194U (en) 1983-07-22 1983-07-22 Boom extension device for cranes

Publications (1)

Publication Number Publication Date
JPS6023194U true JPS6023194U (en) 1985-02-16

Family

ID=30263886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11410283U Pending JPS6023194U (en) 1983-07-22 1983-07-22 Boom extension device for cranes

Country Status (1)

Country Link
JP (1) JPS6023194U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0460994U (en) * 1990-09-28 1992-05-26
KR100950721B1 (en) 2008-03-19 2010-03-31 주현석 The structure to connect ladder in ladder truck
JP2014114117A (en) * 2012-12-10 2014-06-26 Hokuei Co Ltd Trash compressor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0460994U (en) * 1990-09-28 1992-05-26
KR100950721B1 (en) 2008-03-19 2010-03-31 주현석 The structure to connect ladder in ladder truck
JP2014114117A (en) * 2012-12-10 2014-06-26 Hokuei Co Ltd Trash compressor

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