JPS5467953A - Mechanism for maintaining balance of crane truck - Google Patents

Mechanism for maintaining balance of crane truck

Info

Publication number
JPS5467953A
JPS5467953A JP13340277A JP13340277A JPS5467953A JP S5467953 A JPS5467953 A JP S5467953A JP 13340277 A JP13340277 A JP 13340277A JP 13340277 A JP13340277 A JP 13340277A JP S5467953 A JPS5467953 A JP S5467953A
Authority
JP
Japan
Prior art keywords
detector
pressure
balancing
hanging
cylinder
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
JP13340277A
Other languages
Japanese (ja)
Inventor
Yoshikazu Takada
Munetoshi Kira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13340277A priority Critical patent/JPS5467953A/en
Publication of JPS5467953A publication Critical patent/JPS5467953A/en
Pending legal-status Critical Current

Links

Landscapes

  • Jib Cranes (AREA)

Abstract

PURPOSE: To improve the working property, by causing a balancing force without hanging up any counterweight.
CONSTITUTION: A detector 1 for detecting the length of a hanging boom 4 fitted with a hanger 9, and another detector 12 for detecting the pressure of a hanging cylinder 10 of the hanger 9 are provided to control a solenoid valve 22 of a pressure regulating valve 14 between a hydraulic pump 15 and a balancing cylinder 8 attached to a balancing boom 3. When a load 6 is hung up, the pressure caused by the hanging cylinder 10 and proportional to the load 6 is detected by the pressure detector 12. The solenoid valve 22 is controlled by the outputs of the pressure detector 12 and the length detector 11 to regulate the oil pressure supplied to the balancing cylinder 8 to automatically adjust the balancing force.
COPYRIGHT: (C)1979,JPO&Japio
JP13340277A 1977-11-09 1977-11-09 Mechanism for maintaining balance of crane truck Pending JPS5467953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13340277A JPS5467953A (en) 1977-11-09 1977-11-09 Mechanism for maintaining balance of crane truck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13340277A JPS5467953A (en) 1977-11-09 1977-11-09 Mechanism for maintaining balance of crane truck

Publications (1)

Publication Number Publication Date
JPS5467953A true JPS5467953A (en) 1979-05-31

Family

ID=15103899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13340277A Pending JPS5467953A (en) 1977-11-09 1977-11-09 Mechanism for maintaining balance of crane truck

Country Status (1)

Country Link
JP (1) JPS5467953A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5670293A (en) * 1979-11-07 1981-06-12 Japan National Railway Method of decreasing weight of shaft of crane car

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125177U (en) * 1974-08-14 1976-02-24
JPS5144248U (en) * 1974-09-30 1976-04-01

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125177U (en) * 1974-08-14 1976-02-24
JPS5144248U (en) * 1974-09-30 1976-04-01

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5670293A (en) * 1979-11-07 1981-06-12 Japan National Railway Method of decreasing weight of shaft of crane car
JPS5830878B2 (en) * 1979-11-07 1983-07-01 日本国有鉄道 Axle load reduction device for heavy handling vehicles

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