EP0235331A1 - Vorrichtung zur Kontrolle des Bodendruckes einer vibrierenden Planierungsvorrichtung eines vibrierenden Strassenfertigers - Google Patents

Vorrichtung zur Kontrolle des Bodendruckes einer vibrierenden Planierungsvorrichtung eines vibrierenden Strassenfertigers Download PDF

Info

Publication number
EP0235331A1
EP0235331A1 EP86102825A EP86102825A EP0235331A1 EP 0235331 A1 EP0235331 A1 EP 0235331A1 EP 86102825 A EP86102825 A EP 86102825A EP 86102825 A EP86102825 A EP 86102825A EP 0235331 A1 EP0235331 A1 EP 0235331A1
Authority
EP
European Patent Office
Prior art keywords
pressure
spread
circuit
electric circuit
electro
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.)
Withdrawn
Application number
EP86102825A
Other languages
English (en)
French (fr)
Inventor
Domenico Domenighetti
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.)
SIMESA Societa Italiana Montaggi e Servizi Affini SpA
Original Assignee
SIMESA Societa Italiana Montaggi e Servizi Affini SpA
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 SIMESA Societa Italiana Montaggi e Servizi Affini SpA filed Critical SIMESA Societa Italiana Montaggi e Servizi Affini SpA
Priority to EP86102825A priority Critical patent/EP0235331A1/de
Publication of EP0235331A1 publication Critical patent/EP0235331A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
    • E01C19/40—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • E01C19/4833—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with tamping or vibrating means for consolidating or finishing, e.g. immersed vibrators, with or without non-vibratory or non-percussive pressing or smoothing means
    • E01C19/4853—Apparatus designed for railless operation, e.g. crawler-mounted, provided with portable trackway arrangements
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/14—Extendable screeds
    • E01C2301/16—Laterally slidable screeds

Definitions

  • the present invention relates to a device for automatic control of the pressure of the levelling unit in a vibratory finishing machine for road paving on the layer of bituminous mix on which said levelling unit rests.
  • the present invention is a considerable improvement on the device described in Italian Patent No. 741,035 of 17th Sep­tember 1964 in that the adjustment of the pressure of the vibrating levelling unit is automatic, instead of being controlled, and provides also automatic control of the members which carry out these adjustments.
  • the device can also be applied to other types of finishing machines, for example of the self-propelled crawler type.
  • the 'finishing machine' for bituminous mixes, on which the device of the present invention is fitted, consists basically in a 'driving unit' of a type partially already known, but in­tegrated by improvements, which bring great advantages, never applied to a road finishing machine.
  • the new driving unit comprises a levelling unit (1) made up by two longitudinal arms (2) pivoted at their front end - about halfway (along) the driving unit, for example at point (3) - and having at the rear end a grading-levelling device (1), which nowadays is of the so-­called 'hydraulically extensible' type, consisting of a central beam made up by two symmetric elements hinged to one another (so as to carry out the "rise" angle).
  • a hydraulically extensible member (5) is fitted (normally at the back), sliding transversally ( in respect to the machine's forward movement), which allows, under proper control, continuous varia­tions in the spread width.
  • the pressure that the bottom surface (6) of the levelling unit (1) brings on the material to be spread is of capital importance for the good functioning of the machine, in the aim to reduce waviness and to guarantee an optimum levelling of the layer spread on the road, without having to resort to subsequent adjustments.
  • the device according to the present in­vention foresees the use of two oleostatic actuators (24) (Fig. 2), connected at one end to the driving unit (0 ⁇ ) and at the other end to the arm (2) of the levelling unit (1).
  • the delivery pipe (23) is connected to the actuators (24).
  • a maximum pressure regulator (26), to be adjusted from time to time for correct setting, is inserted on the delivery pipe (21).
  • the valve (26) is fitted with a return pipe (27) which allows a part of the fluid to be discharged into the tank (18), so to carry out its regulating function.
  • An accumulator chamber (28) is mounted on the delivery pipe (23).
  • a so-called 'priority' valve (41), is foreseen; its function is to channel a predetermined amount of oil to the delivery pipe (30) and discharge the excess thereof by means of the return pipe (31).
  • the pressure oil reaches a pressure-regulating valve (45), electrically controlled, and an electromanometer (46).
  • the senor (49) is composed of a wire, connected at one end of the extensible elements (5), while on the other end a coiler is mounted which constantly measures the total length of the ex­tensible elements (5) and transmits it by means of the electric circuit to a comparator (47).
  • the operator using the trimmer (48) fixes the maximum value of the oil pressure which is considered acceptable to discharge at the most the weight of the grading levelling device (grader) when it is fully retracted.
  • This trimmer (48) sends, through the electric circuit, the pre­selected maximum value signal to the comparator (47), which com­pares electronically the three data and translates them into a command to the valve (45) for the necessary adjustments.
  • any variation of the spread width is followed in actual time by a reaction of the electric-hydraulic equipment, which changes the oil pressure in the two actuators so as to keep constant the pressure of the grader bottom surface on the bituminous mix layer which is spread on the ground.
  • This contact pressure between the grader and the mix which, thanks to the present invention, is kept rigourously constant independently of any variation in the spread width, can of course be changed and adjusting by acting on the trimmer (48) so as to adapt the pressure to variable working conditions (plasticity, thickness, etc. of the layer to be spread).
  • the member (45), (46) and (48) are generally grouped on a 'control panel' (50) to allow the operator to control all the instrument which inform him of the adjusting process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
EP86102825A 1986-03-04 1986-03-04 Vorrichtung zur Kontrolle des Bodendruckes einer vibrierenden Planierungsvorrichtung eines vibrierenden Strassenfertigers Withdrawn EP0235331A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP86102825A EP0235331A1 (de) 1986-03-04 1986-03-04 Vorrichtung zur Kontrolle des Bodendruckes einer vibrierenden Planierungsvorrichtung eines vibrierenden Strassenfertigers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86102825A EP0235331A1 (de) 1986-03-04 1986-03-04 Vorrichtung zur Kontrolle des Bodendruckes einer vibrierenden Planierungsvorrichtung eines vibrierenden Strassenfertigers

Publications (1)

Publication Number Publication Date
EP0235331A1 true EP0235331A1 (de) 1987-09-09

Family

ID=8194937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102825A Withdrawn EP0235331A1 (de) 1986-03-04 1986-03-04 Vorrichtung zur Kontrolle des Bodendruckes einer vibrierenden Planierungsvorrichtung eines vibrierenden Strassenfertigers

Country Status (1)

Country Link
EP (1) EP0235331A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666104A1 (fr) * 1990-08-27 1992-02-28 Cochery Bourdin Chausse Procede et dispositif d'etalement d'une couche d'enrobe sur une chaussee et finisseur equipe d'un tel dispositif.
US20110110849A1 (en) * 2008-04-29 2011-05-12 Roland Siemons Method of converting a raw material stream into a product stream using a fluidized bed and apparatus for use in said method
CN102505620A (zh) * 2011-11-10 2012-06-20 中联重科股份有限公司 一种摊铺机熨平板减压装置的压力调节方法及其装置
CN102852077A (zh) * 2012-08-18 2013-01-02 徐州凯莫尔重工科技有限公司 一种伸缩熨平板液压控制阀组

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1090224A (en) * 1964-09-05 1967-11-08 Dimenico Domenighetti An olepneumatic compensating device, in which pressure produced by the smoothing surface of the grader unit of a vibrating finishing machine for the spreading of material layers in roadway constructions is kept to a constant value
DE2447760A1 (de) * 1974-10-07 1976-04-15 Renner Co Strassendecken-fertiger mit belagstaerkenund ebenheits-regelung
US4026658A (en) * 1974-07-26 1977-05-31 Barber-Greene Company Automatic support system for a screed

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1090224A (en) * 1964-09-05 1967-11-08 Dimenico Domenighetti An olepneumatic compensating device, in which pressure produced by the smoothing surface of the grader unit of a vibrating finishing machine for the spreading of material layers in roadway constructions is kept to a constant value
US4026658A (en) * 1974-07-26 1977-05-31 Barber-Greene Company Automatic support system for a screed
DE2447760A1 (de) * 1974-10-07 1976-04-15 Renner Co Strassendecken-fertiger mit belagstaerkenund ebenheits-regelung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666104A1 (fr) * 1990-08-27 1992-02-28 Cochery Bourdin Chausse Procede et dispositif d'etalement d'une couche d'enrobe sur une chaussee et finisseur equipe d'un tel dispositif.
BE1005380A0 (fr) * 1990-08-27 1993-07-06 Cochery Bourdin Chausse Procede et dispositif d'etalement d'une couche d'enrobe sur une chaussee et finisseur equipe d'un tel dispositif.
ES2064176A1 (es) * 1990-08-27 1995-01-16 Cochery Bourdin Chausse Procedimiento y dispositivo de esparcimiento de una capa de mezcla bituminosa sobre una calzada y aplicador equipado con tal dispositivo.
US20110110849A1 (en) * 2008-04-29 2011-05-12 Roland Siemons Method of converting a raw material stream into a product stream using a fluidized bed and apparatus for use in said method
CN102505620A (zh) * 2011-11-10 2012-06-20 中联重科股份有限公司 一种摊铺机熨平板减压装置的压力调节方法及其装置
CN102852077A (zh) * 2012-08-18 2013-01-02 徐州凯莫尔重工科技有限公司 一种伸缩熨平板液压控制阀组

Similar Documents

Publication Publication Date Title
US4682908A (en) Device for controlling the pressure upon the ground of a screed unit of vibrating finishing machine for road paving
DE19939796C1 (de) Verfahren und Arbeitsmaschine zur Herstellung von Bodenflächen
US5568992A (en) Screed control system for an asphalt paver and method of use
DE19581287B4 (de) Gerätesystem, das die Kipprate kompensiert und Verfahren
US5575583A (en) Apparatus and method for controlling the material feed system of a paver
DE819699C (de) Strassenbaumaschine, insbesondere zur Herstellung bituminoeser oder zementgebundener Belaege
US4854769A (en) System for paving inclined and/or curved surfaces
US6269885B1 (en) Blade height control system for a motorized grader
US6405633B1 (en) Hydraulic piston-cylinder unit for agricultural machines
EP3208381B1 (de) Pflastermaschine zum aufbringen unterschiedlicher kronenprofile und verfahren
DE102005022266A1 (de) Fertiger zum bodenseitigen Einbau von Schichten für Straßen oder dgl.
AU5508800A (en) Method and apparatus for controlling the direction of travel of an earthworking machine
EP2031256A2 (de) Hubwerk und Verfahren zum Ansteuern eines Hubwerkes
EP2025811A1 (de) Verfahren und Regelsystem zum Einbauen einer Deckenschicht
EP3472390B1 (de) Strassenbaumaschine und verfahren zum betreiben einer selbstfahrenden strassenbaumaschine
DE19709131C2 (de) Deckenfertiger
DE69010419T2 (de) Hydraulische schaltung für maschinen.
US4403889A (en) Grade control alignment device and method
US12203226B2 (en) Dowel bar inserter
US20130087351A1 (en) Dual Cylinders For Effecting Tilt And Pitch Functions Of A Dozer Blade
US20020011013A1 (en) Hydraulic excavating mobile machine
US3989402A (en) Paving machine with thickness and leveling control
US3236163A (en) Means for laying paving material
EP0306532A1 (de) Vorrichtung zur korrektur der stillstandslage einer schaufel
JPH09228404A (ja) 建設機械の作業機制御方法およびその装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE FR GB LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19880309

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DOMENIGHETTI, DOMENICO