JPS57137703A - Hydraulic controlling circuit - Google Patents

Hydraulic controlling circuit

Info

Publication number
JPS57137703A
JPS57137703A JP2014981A JP2014981A JPS57137703A JP S57137703 A JPS57137703 A JP S57137703A JP 2014981 A JP2014981 A JP 2014981A JP 2014981 A JP2014981 A JP 2014981A JP S57137703 A JPS57137703 A JP S57137703A
Authority
JP
Japan
Prior art keywords
load
pressure
acceleration
main valves
constitution
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
JP2014981A
Other languages
Japanese (ja)
Inventor
Tadashi Takahashi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2014981A priority Critical patent/JPS57137703A/en
Publication of JPS57137703A publication Critical patent/JPS57137703A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

PURPOSE:To enable to average the absolute value of acceleration even in the change of mass of load by a constitution wherein the acceleration of the load is supplementarily controlled by means of a directional controlling valve which is actuated by the difference between the pressure of the load just before the start of the actuation of main valves and the working pressure on load. CONSTITUTION:There are provided an accumulator 14 holding the pressure of the load of the main valves 5 and 9 just before the start of their actuation, a cut-off valve trapping said pressure of the load and the directional controlling valve 16 which is actuated by the difference between the pressure at work at the load side of the main valves 5 and 9 and the pressure within the accumulator 14. The closing and opening of the main valves 5 and 9 are so constituted as to be supplementarily controlled by means of the directional controlling valve 16 in accordance with the acceleration of the load by utilizing that the acceleration of the load and said difference between the above-mentioned pressures have a specified relationship between each other. Owing to the constitution as mentioned above, even in the change of the mass of the load, the maximum value of the absolute value of the acceleration of the load can be kept at constant, resulting in enabling to smooth the vertical movement of an elevator.
JP2014981A 1981-02-16 1981-02-16 Hydraulic controlling circuit Pending JPS57137703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014981A JPS57137703A (en) 1981-02-16 1981-02-16 Hydraulic controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014981A JPS57137703A (en) 1981-02-16 1981-02-16 Hydraulic controlling circuit

Publications (1)

Publication Number Publication Date
JPS57137703A true JPS57137703A (en) 1982-08-25

Family

ID=12019089

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014981A Pending JPS57137703A (en) 1981-02-16 1981-02-16 Hydraulic controlling circuit

Country Status (1)

Country Link
JP (1) JPS57137703A (en)

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