EP0005260B1 - Power operated tongs for moving steel slabs or ingots - Google Patents

Power operated tongs for moving steel slabs or ingots Download PDF

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Publication number
EP0005260B1
EP0005260B1 EP79101325A EP79101325A EP0005260B1 EP 0005260 B1 EP0005260 B1 EP 0005260B1 EP 79101325 A EP79101325 A EP 79101325A EP 79101325 A EP79101325 A EP 79101325A EP 0005260 B1 EP0005260 B1 EP 0005260B1
Authority
EP
European Patent Office
Prior art keywords
tongs
housing
axis
pliers
storage 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.)
Expired
Application number
EP79101325A
Other languages
German (de)
French (fr)
Other versions
EP0005260A1 (en
Inventor
Heinz Bussfeld
Heinz-Otto Dipl.-Ing. Gabriel
Willi Ing. Leweke (Grad.)
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.)
Hegenscheidt MFD GmbH and Co KG
Original Assignee
Hoesch Maschinenfabrik Deutschland AG
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 Hoesch Maschinenfabrik Deutschland AG filed Critical Hoesch Maschinenfabrik Deutschland AG
Priority to AT79101325T priority Critical patent/ATE251T1/en
Publication of EP0005260A1 publication Critical patent/EP0005260A1/en
Application granted granted Critical
Publication of EP0005260B1 publication Critical patent/EP0005260B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/425—Gripping members engaging only the external or internal surfaces of the articles motor actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/04—Handling or stripping castings or ingots

Definitions

  • the invention relates to force-locking pliers for transporting steel blocks, steel billets, slabs or the like, with a pliers housing and two two-armed pliers legs, each pivotable about an axis, between whose upper arms a force device for closing and opening the pliers is arranged, during gripping an energy accumulator is charged, which maintains the contact pressure of the pliers legs when transporting the material.
  • the force device of each pliers is a hydraulic cylinder.
  • a piston pressure accumulator attached to the hydraulic cylinder is used as the energy accumulator, which is charged while the workpiece is being picked up.
  • the damping of the collision force that occurs depends on the position of the pliers legs. For example, with the pliers limbs in a vertical position, damping of the vertically acting collision force is not possible at all.
  • the invention has for its object to design a pliers of the type mentioned in such a way that it ensures a damping of the collision forces that do not occur on the pliers legs.
  • each force arm is mounted on a rocker arm held by a double-acting force accumulator supported on the forceps housing, the axis of rotation of which is arranged on the forceps housing and is offset in a horizontal and vertical direction relative to the axis of the associated forceps leg.
  • the first embodiment example according to FIGS. 1 and 2 is placed on force-locking pliers 10 for transporting a steel block 11.
  • the pliers 10 which are attached to a crane (not shown) by means of the four support members 13, 14, 15, 16 attached to a pliers housing 12, have two pliers legs 19, 20 which can be pivoted about an axis 17, 18.
  • Each axis 17, 18 is rotatably mounted in a rocker 21, 22, the axis of rotation 23, 24 of which forms a swivel joint with the pliers housing 12. Both axes of rotation 23, 24 are offset from their associated axes 17, 18 of the pliers legs 19, 20 in the horizontal direction by the dimension a and in the vertical direction by the dimension b.
  • a force accumulator 25, 26 is articulated to each rocker 21, 22 and is supported on a bearing block 27, 28 connected to the pliers housing 12.
  • the drive mechanism of the pliers 10 includes a threaded spindle 30 driven by a drive unit 29 with left and right-hand threads and two nuts 31, 32 rotatably mounted on the upper arms of the pliers legs 19, 20.
  • the drive unit 29 is held in the direction of the axis of the threaded spindle 30 a fork 33 with two springs 34,35.
  • the fork 33 is rotatably mounted in an arm 37 pivotable about an axis 36.
  • a rod 38 connected to the drive unit 29 and the pliers housing 12 performs the function of a torque support.
  • the forceps closing force causes the two energy stores 25, 26 to be charged via the two rockers 21, 22.
  • each double-acting force accumulator 25, 26 fulfills the function of a shock absorber as soon as horizontal or vertical collision forces become effective on the pliers legs 19, 20 in the plane of the pliers.
  • the second exemplary embodiment according to FIGS. 3 and 4 is intended for a tong crosspiece 39 for transporting six steel billets 40 lying next to one another.
  • Two lower blocks 42 are arranged on a crossbar 41 in order to suspend the tong crossbar 39 on a steel crane - not shown.
  • the crossbar 39 consists essentially Lichen from two combined pliers 43, the pliers legs 44, 45, swing arms 46, 47, axes 48, 49, axes of rotation 50, 51, energy storage 52, 53 and threaded spindles 54 with nuts 55, 56 are designed and arranged in the same way as with the pliers 10 of the first embodiment.
  • the drive of a threaded spindle 54 is formed from an electric motor 57, an articulated shaft 58 and a gear 59.
  • the traverse 41 is designed with two hold-down devices 60, which hold the six steel billets 40 in a horizontal plane.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

1. Power-operated tongs for transporting steel ingots, billets, slabs or the like, with a tongs housing (12) and two two-armed tongs legs (19, 20, 44, 45) each pivotable about an axis (17, 18, 48, 49), between the upper arms of which a power unit (29, 30, 31, 32) is arranged, for closing and opening the tongs, by means of which a power storage device (25, 26, 52, 53) is actuated during seizure of the workpiece, which storage device maintains the pressure of the tongs legs during transport of the workpiece, characterized in that for power storage each tongs leg (19, 20, 44, 45) is mounted upon a rocker arm (21, 22, 46, 47) held by a double-acting power storage device (25, 26, 52, 53) carried on the tongs housing (12) and having its pivot axis (23, 24, 50, 51) located on the tongs housing (12) displaced in the horizontal and vertical directions with respect to the axis (17, 18, 48, 49) of the associated tongs leg.

Description

Die Erfindung betrifft eine kraftschließende Zange zum Transportieren von Stahlblöcken, Stahlknüppeln, Brammen oder dgl, mit einem Zangengehaüse und zwei zweiarmigen, um je eine Achse schwenkbaren Zangenschenkeln, zwischen deren oberen Armen ein Kraftgerät zum Schließen und Öffnen der Zange angeordnet ist, wobei während des Fassens des Werkgutes ein Kraftspeicher aufgeladen wird, der den Anpreßdruck der Zangenschenkel beim Transportieren des Werkgutes aufrechterhält.The invention relates to force-locking pliers for transporting steel blocks, steel billets, slabs or the like, with a pliers housing and two two-armed pliers legs, each pivotable about an axis, between whose upper arms a force device for closing and opening the pliers is arranged, during gripping an energy accumulator is charged, which maintains the contact pressure of the pliers legs when transporting the material.

Eine derartige Zange ist durch die Zeitschrift "Fördern und Heben", Jahrgang 18, 1968, Heft 4, Seiten 865 und 866, bei einem Zangenkran für den Transport warmer Brammen bekannt, bei dem sechs Zangen der eingangs genannten Art auf einer heb- und senkbaren Traverse nebeneinander angeordnet sind.Such a pair of tongs is known from the magazine "Förder und Heben", year 18, 1968, number 4, pages 865 and 866, for a tongs crane for the transport of warm slabs, in which six tongs of the type mentioned at the beginning can be raised and lowered Traverse are arranged side by side.

Das Kraftgerät einer jeden Zange ist ein Hydraulikzylinder. Als Kraftspeicher, der während des Fassens des Werkgutes aufgeladen wird, ist ein an den Hydraulikzylinder angebauter Kolben-Druck-speicher eingesetzt.The force device of each pliers is a hydraulic cylinder. A piston pressure accumulator attached to the hydraulic cylinder is used as the energy accumulator, which is charged while the workpiece is being picked up.

Mit einer solchen Ausführung ist es möglich, den Kolben-Druck-speicher so an den Hydraulikzylinder anzuschließen, daß er die Funktion eines Stoßdämpfers übernehmen kann. Dies gilt für den Fall der Kollision der geöffneten Zange mit einem Hindernis, wenn die Kollisionskraft im schließenden oder öffnenden Sinne auf einen oder beide Zangenschenkel einwirkt.With such a design, it is possible to connect the piston-pressure accumulator to the hydraulic cylinder in such a way that it can take over the function of a shock absorber. This applies to the case of the collision of the open pliers with an obstacle, if the collision force acts on one or both pliers legs in the closing or opening sense.

Beim Aufschlagen der geöffneten Zange auf ein Hindernis oder auf den Hüttenflur hängt jedoch die Dämpfung der auftretenden Kollisionskraft von der Stellung der Zangenschenkel ab. So ist beispielsweise bei senkrechter Stellung der Zangenschenkel eine Dämpfung der senkrecht wirkenden Kollisionskraft überhaupt nicht möglich.However, when the opened pliers hit an obstacle or the hut floor, the damping of the collision force that occurs depends on the position of the pliers legs. For example, with the pliers limbs in a vertical position, damping of the vertically acting collision force is not possible at all.

Der Erfindung liegt die Aufgabe zugrunde, eine Zange der eingangs genannten Art so auszubilden, daß sie eine Dämpfung der an den Zangenschenkein auftretenden Kollisionskräfte gewährleistet.The invention has for its object to design a pliers of the type mentioned in such a way that it ensures a damping of the collision forces that do not occur on the pliers legs.

Diese Aufgabe wird nach der Erfindung ausgehend von dem eingangs näher bezeichneten. Stand der Technik dadurch gelöst, daß zur Kraftspeicherung jeder Zangenschenkel jeweils an einer von einem doppeltwirkenden, sich auf dem Zangengehäuse abstützenden Kraftspeicher gehaltenen Schwinge gelagert ist, deren am Zangengehäuse angeordnete Drehachse gegenüber der Achse des zugehörigen Zangenschenkels in waagerechter und senkrechter Richtung versetzt angeordnet ist.This object is, according to the invention, based on that specified in the introduction. The state of the art is solved in that each force arm is mounted on a rocker arm held by a double-acting force accumulator supported on the forceps housing, the axis of rotation of which is arranged on the forceps housing and is offset in a horizontal and vertical direction relative to the axis of the associated forceps leg.

Im folgenden wird die Erfindung anhand einer Zeichnung, in der zwei Ausführungsbeispiele schematisch dargestellt sind, beschrieben. Es zeigt

  • Fig. 1 eine an einen Kran anhängbare Zange in Ansicht mit einem Stahlblock in Teilansicht,
  • Fig. 2 die Zange als Schnitt gemäß der Linie 11-11 in Fig. 1,
  • Fig. 3 eine Zangentraverse eines Hüttenkranes mit sechs Stahlknüppeln in Ansicht,
  • Fig. 4 die Zangentraverse als Schnitt gemäß der Linie IV-IV in Fig. 3.
The invention is described below with reference to a drawing in which two exemplary embodiments are shown schematically. It shows
  • 1 a pliers attachable to a crane in view with a steel block in partial view,
  • 2 the pliers as a section along the line 11-11 in Fig. 1,
  • 3 shows a crossbar of a steel crane with six steel billets in view,
  • 4 shows the crossbar as a section along the line IV-IV in FIG. 3rd

Das erste Ausfurungsbeispiel nach den Figuren 1 und 2 ist abgestellt auf eine kraftschließend Zange 10 zum Transportieren eines Stahlblockes 11.The first embodiment example according to FIGS. 1 and 2 is placed on force-locking pliers 10 for transporting a steel block 11.

Die Zange 10, die mittels der vier an einem Zangengehäuse 12 angebrachten Tragglieder 13, 14, 15, 16 an einen Kran - nicht dargestellt - angehängt wird, besitzt zwei zweiarmige, um je eine Achse 17, 18 schwenkbare Zangenschenkel 19, 20.The pliers 10, which are attached to a crane (not shown) by means of the four support members 13, 14, 15, 16 attached to a pliers housing 12, have two pliers legs 19, 20 which can be pivoted about an axis 17, 18.

Jede Achse 17, 18 ist drehbar gelagert in einer Schwinge 21, 22, deren Drehachse 23, 24 mit dem Zangengehäuse 12 ein Drehgelenk bildet. Beide Drehachsen 23, 24 sind gegenüber den ihnen zugehörigen Achsen 17, 18 der Zangenschenkel 19, 20 in waagerechter Richtung um das Maß a und in senkrechter Richtung um das Maß b versetzt angeordnet.Each axis 17, 18 is rotatably mounted in a rocker 21, 22, the axis of rotation 23, 24 of which forms a swivel joint with the pliers housing 12. Both axes of rotation 23, 24 are offset from their associated axes 17, 18 of the pliers legs 19, 20 in the horizontal direction by the dimension a and in the vertical direction by the dimension b.

An jede Schwinge 21, 22 ist ein Kraftspeicher 25, 26 gelenkig angeschlossen, der sich an einem mit dem Zangengehäuse 12 verbundenen Lagerbock 27, 28 abstützt.A force accumulator 25, 26 is articulated to each rocker 21, 22 and is supported on a bearing block 27, 28 connected to the pliers housing 12.

Zum Antriebsmechanismus der Zange 10 gehört eine von einer Antriebseinheit 29 angetriebene Gewindespindel 30 mit Links- und Rechtsgewinde sowie zwei an den oberen Armen der Zangenschenkel 19, 20 drehbar gelagerten Muttern 31, 32. Die Antriebseinheit 29 wird in Richtung der Achse der Gewindespindel 30 gehalt durch eine Gabel 33 mit zwei Federn 34,35.The drive mechanism of the pliers 10 includes a threaded spindle 30 driven by a drive unit 29 with left and right-hand threads and two nuts 31, 32 rotatably mounted on the upper arms of the pliers legs 19, 20. The drive unit 29 is held in the direction of the axis of the threaded spindle 30 a fork 33 with two springs 34,35.

Die Gabel 33 ist drehbar gelagert in einem um eine Achse 36 schwenkbaren Arm 37. Eine mit der Antriebseinheit 29 und dem Zangengehäuse 12 verbundene Stange 38 übt die Funktion einer Drehmomentenstütze aus.The fork 33 is rotatably mounted in an arm 37 pivotable about an axis 36. A rod 38 connected to the drive unit 29 and the pliers housing 12 performs the function of a torque support.

Beim Erfassen des Stahlblockes 11 bewirkt die Zangenschließkraft über die beiden Schwingen 21, 22 ein Aufladen der beiden Kraftspeicher 25, 26.When the steel block 11 is gripped, the forceps closing force causes the two energy stores 25, 26 to be charged via the two rockers 21, 22.

Im geöffneten Zustand der Zange 10 erfüllt jeder doppeltwirkend ausgeführte Kraftspeicher 25, 26 die Funktion eines Stoßdampfers, sobald an den Zangenschenkeln 19, 20 waagerechte oder senkrechte Kollisionskräfte in der Zangenebene wirksam werden.In the open state of the pliers 10, each double-acting force accumulator 25, 26 fulfills the function of a shock absorber as soon as horizontal or vertical collision forces become effective on the pliers legs 19, 20 in the plane of the pliers.

Das zweite Ausführungsbeispiel nach den Figuren 3 und 4 ist gedacht für eine Zangentraverse 39 zum Transportieren von sechs nebeneinander liegenden Stahlknüppeln 40.The second exemplary embodiment according to FIGS. 3 and 4 is intended for a tong crosspiece 39 for transporting six steel billets 40 lying next to one another.

Zur Aufhängung der Zangentraverse 39 an einen Hüttenkran - nicht dargestellt - sind auf einer Traverse 41 zwei Unterflaschen 42 angeordnet.Two lower blocks 42 are arranged on a crossbar 41 in order to suspend the tong crossbar 39 on a steel crane - not shown.

Die Zangentraverse 39 besteht im wesentlichen aus zwei zu einer Baueinheit zusammengefaßten Zangen 43, deren Zangenschenkel 44, 45, Schwingen 46, 47, Achsen 48, 49, Drehachsen 50, 51, Kraftspeicher 52, 53 und Gewindespindeln 54 mit Muttern 55, 56 in gleicher Weise ausgeführt und angeordnet sind wie bei der Zange 10 des ersten Ausführungsbeispiels.The crossbar 39 consists essentially Lichen from two combined pliers 43, the pliers legs 44, 45, swing arms 46, 47, axes 48, 49, axes of rotation 50, 51, energy storage 52, 53 and threaded spindles 54 with nuts 55, 56 are designed and arranged in the same way as with the pliers 10 of the first embodiment.

Der Antrieb einer Gewindespindel 54 wird gebildet aus einem Elektromotor 57, einer Gelenkwelle 58 und einem Getriebe 59.The drive of a threaded spindle 54 is formed from an electric motor 57, an articulated shaft 58 and a gear 59.

Die Traverse 41 ist mit zwei Niederhaltern 60 ausgeführt, die die sechs Stahlknüppel 40 in einer waagerechten Ebene halten.The traverse 41 is designed with two hold-down devices 60, which hold the six steel billets 40 in a horizontal plane.

Claims (1)

  1. Power-operated tongs for transporting steel ingots, billets, slabs or the like, with a tongs housing (12) and two two-armed tongs legs (19, 20, 44, 45) each pivotable about an axis (17, 18, 48, 49), between the upper arms of which a power unit (29, 30, 31, 32) is arranged, for closing and opening the tongs, by means of which a power storage device (25, 26, 52, 53) is actuated during seizure of the workpiece, which storage device maintains the pressure of the tongs legs during transport of the workpiece, characterized in that for power storage each tongs leg (19, 20, 44, 45) is mounted upon a rocker arm (21, 22, 46, 47) held by a double-acting power storage device (25, 26, 52, 53) carried on the tongs housing (12) and having its pivot axis (23, 24, 50, 51) located on the tongs housing (12) displaced in the horizontal and vertical directions with respect to the axis (17, 18, 48, 49) of the associated tongs leg.
EP79101325A 1978-05-05 1979-05-02 Power operated tongs for moving steel slabs or ingots Expired EP0005260B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79101325T ATE251T1 (en) 1978-05-05 1979-05-02 FORCING TONGS FOR TRANSPORTING STEEL BLOCKS, STEEL BILLETS, SLABS OR THE LIKE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE7813656U 1978-05-05
DE7813656 1978-05-05

Publications (2)

Publication Number Publication Date
EP0005260A1 EP0005260A1 (en) 1979-11-14
EP0005260B1 true EP0005260B1 (en) 1981-09-30

Family

ID=6691229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79101325A Expired EP0005260B1 (en) 1978-05-05 1979-05-02 Power operated tongs for moving steel slabs or ingots

Country Status (4)

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EP (1) EP0005260B1 (en)
AT (1) ATE251T1 (en)
BE (1) BE894288Q (en)
DE (1) DE2961119D1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3107458A1 (en) * 1981-02-27 1982-09-16 Rahdener Maschinenfabrik August Kolbus Gmbh & Co Kg, 4993 Rahden BOOK BLOCK PLIERS FOR TRANSPORT SYSTEM
DE3500056A1 (en) * 1985-01-03 1986-07-10 MAN Gutehoffnungshütte GmbH, 4200 Oberhausen SELF-CLOSING PLIERS FOR TRANSPORTING STEEL BLOCKS, SLABS OR THE LIKE
JPH0424584U (en) * 1990-06-25 1992-02-27
JP5515407B2 (en) 2009-05-15 2014-06-11 コベルコ建機株式会社 Work machine gripping device and work machine equipped with the same
JP5233840B2 (en) * 2009-05-20 2013-07-10 コベルコ建機株式会社 Work machine gripping device and work machine equipped with the same
NL2020536B1 (en) * 2018-03-06 2019-09-13 Itrec Bv Pile holding system, vessel and pile installation method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE571535C (en) * 1931-12-13 1933-03-02 Demag Akt Ges Block and stripper pliers
US2959411A (en) * 1957-12-23 1960-11-08 Cullen Friestedt Company Shock absorbing linkage mechanism
FR1559727A (en) * 1967-12-22 1969-03-14
DE1921959B2 (en) * 1969-04-30 1974-04-18 Fried. Krupp Gmbh, 4300 Essen Truss crockery for transporting slabs or the like

Also Published As

Publication number Publication date
EP0005260A1 (en) 1979-11-14
ATE251T1 (en) 1981-10-15
BE894288Q (en) 1983-01-03
DE2961119D1 (en) 1981-12-10

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