WO1989012145A1 - Stone tongs for excavators - Google Patents

Stone tongs for excavators Download PDF

Info

Publication number
WO1989012145A1
WO1989012145A1 PCT/CH1989/000027 CH8900027W WO8912145A1 WO 1989012145 A1 WO1989012145 A1 WO 1989012145A1 CH 8900027 W CH8900027 W CH 8900027W WO 8912145 A1 WO8912145 A1 WO 8912145A1
Authority
WO
WIPO (PCT)
Prior art keywords
bucket
stones
stone
arms
excavators
Prior art date
Application number
PCT/CH1989/000027
Other languages
German (de)
French (fr)
Inventor
Peter Ruf
Original Assignee
Schweisswerk Gischig 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 Schweisswerk Gischig Ag filed Critical Schweisswerk Gischig Ag
Priority to DE8989902015T priority Critical patent/DE58905150D1/en
Priority to AT89902015T priority patent/ATE92563T1/en
Publication of WO1989012145A1 publication Critical patent/WO1989012145A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/402—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors
    • E02F3/404—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors comprising two parts movable relative to each other, e.g. for gripping

Definitions

  • the object of the present invention was to solve the following problem:
  • the spoon is replaced by a special stone gripper. It essentially consists of three to five circularly arranged, hydraulically operated arms. The stones or blocks of iron can thus be gripped and clamped. Unfortunately, such a special gripper does not have the possibility of digging trenches or holes with its arms. It is therefore only useful for work in which stones have to be lifted practically exclusively, because otherwise a constant reassembly of this stone fer to the normal excavator bucket and vice versa would not be debatable.
  • FIG. 1 shows a side view on which the gripping arms 1 attached to the excavator bucket can be seen.
  • Figure 1 shows the whole arrangement from above.
  • the basic innovations are now as follows: Due to the optimal arrangement of the two gripper arms 1 and a corresponding construction, the stone tongs arms 1 can be pivoted completely upward, so that the stone tongs 1 remain on the shovel even during normal excavation work can and do not represent a disability.
  • the assembly of the stone tongs 1 on the rotating part (blade) 2 ensures that the stone tongs arms 1 follow all the movements of the blade 2.
  • the inventor has succeeded in finding a practical, practical and at the same time safe and comfortable solution to the problems mentioned at the beginning.
  • the simple construction method used at the same time guarantees a cost-effective production. Because of this practicality mentioned, this stone pliers will find a quick spread.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Shovels (AREA)

Abstract

These stone tongs for excavators solve an old problem, namely that large stones present in the excavated earth cannot be lifted with an ordinary excavator shovel. This problem is solved by the invention by means of two additional gripper arms or tong elements (1) which can be mounted on an ordinary excavator shovel (2) and hydraulically controlled. Very large excavated stones can thereby be gripped in a tong-like manner and removed.

Description

Bei der vorliegenden Erfindung ging es darum, folgendes Problem zu lösen : The object of the present invention was to solve the following problem:
Mit den normalen Baggerschaufeln ist es nur schwer möglich, grössere Steine zu ergreifen . Steine oder Felsblöcke können nur aufwendig von einem zum anderen Ort verschoben werden . Sie sind kaum mit einer normalen Bagger- schaufei ergreifbar. Soll der Stein aus einem Graben gehoben werden, so treten immer Probleme auf. Aber auch das genaue Plazieren von solchen Stei¬ nen oder Felsblöcken bereitet ohne eine spezielle Vorrichtung immer Schwie¬ rigkeiten .With normal excavator shovels, it is difficult to grasp larger stones. Stones or boulders can only be moved from one place to another with great effort. They can hardly be reached with a normal excavator shovel. If the stone is to be lifted out of a trench, problems always arise. However, the exact placement of such stones or boulders always presents difficulties without a special device.
Grössere Steine oder Felsblöcke müssen also problemlos gehoben, verschoben und plaziert werden können .Larger stones or boulders must be able to be lifted, moved and placed without any problems.
Bislang umging man das Problem, indem grosse Steine zuerst zerkleinert und dann mit einer genügend grossen Schaufel oder mit Muskelkraft verschoben wurden . Dies ist eine mühsame, schwerfällige und zeitaufwendige Aufgabe, die bei der Plazierung von grossen Böschungs- oder Ziersteinen ganz ausser Betracht bleiben muss. Hier kommt nur noch die Methode, den Stein mit einem Seil am Löffelstiel zu befestigen, in Frage. Zum grossen Zeitaufwand gesellt sich die grosse Abrutschgefahr. Weiter existiert die Möglichkeit, eine für den Kiesabbau konstruierte Schaufel zu benützen . Sie besteht aus zwei sich zu einem Zylinder ergänzenden Schaufelhälften, die wie eine Zange geöffnet und geschlossen werden können . Leider ist diese Schaufel nur schlecht für Aushubarbeiten geeignet. Zudem wird die Grosse der heb¬ baren Steine stark durch den maximalen Oeffnungswinkel der Schaufel begrenzt.So far, the problem has been avoided by first crushing large stones and then moving them with a sufficiently large shovel or with muscle power. This is a tedious, cumbersome, and time-consuming task that has to be neglected when placing large embankment or decorative stones. Here only the method of attaching the stone to the dipper stick with a rope comes into question. The great risk of slipping is combined with the great expenditure of time. There is also the option of using a shovel designed for gravel mining. It consists of two blade halves that complement each other and can be opened and closed like a pair of pliers. Unfortunately, this shovel poorly suited for excavation work. In addition, the size of the liftable stones is greatly limited by the maximum opening angle of the blade.
Gemäss dem heutigen Stand der Technik werden die folgenden drei Lösungs¬ varianten getroffen :According to the current state of the art, the following three solution variants are made:
1 . Variante:1 . Variant:
Eine bereits bekannte Möglichkeit ist es, einen durch die Hydraulik der Ma¬ schine betriebenen Zusatzgreifer am Löffelstiel selber zu befestigen . Damit ist es nicht mehr notwendig, dass der Stein mit andern Hilfsmitteln auf die Baggerschaufel geladen und fixiert werden muss . Der Zusatzgreifer kann nun die klemmende Wirkung ausüben, die zum Anheben von Steinen oder Felsblöcken notwendig ist. Leider muss aber bei dieser Variante der Greifer synchron zur Schaufel von Hand nachgefahren werden , was in der Praxis Probleme liefert und die Steuerung erheblich verkompliziert.An already known possibility is to attach an additional gripper operated by the hydraulic system of the machine to the dipper arm itself. This means that it is no longer necessary for the stone to be loaded and fixed on the excavator shovel using other aids. The additional gripper can now exert the clamping effect that is required to lift stones or boulders. Unfortunately, with this variant, the gripper has to be traversed by hand in synchronism with the bucket, which in practice poses problems and considerably complicates the control.
2. Variante:2nd variant:
Der Löffel wird durch einen speziellen Steingreϊfer ersetzt. Er besteht im wesentlichen aus drei bis fünf kreisförmig angeordneten, hydraulisch betrie¬ benen Armen . Die Steine oder Feisblöcke können damit umfasst und festge¬ klemmt werden . Leider geht einem solchen Spezialgreifer mit seinen Armen die Möglichkeit, Gräben oder Löcher auszuheben, ganz ab. Er ist also nur für Arbeiten sinnvoll bei denen praktisch ausschliesslich Steine gehoben werden müssen, weil sonst ein ständiges Ummontieren von diesem Steingrei- fer zur normalen Baggerschaufel und umgekehrt nicht diskutabel wäre.The spoon is replaced by a special stone gripper. It essentially consists of three to five circularly arranged, hydraulically operated arms. The stones or blocks of iron can thus be gripped and clamped. Unfortunately, such a special gripper does not have the possibility of digging trenches or holes with its arms. It is therefore only useful for work in which stones have to be lifted practically exclusively, because otherwise a constant reassembly of this stone fer to the normal excavator bucket and vice versa would not be debatable.
Diese Nachteile konnte der Erfinder des vorliegenden Patentes auf geschickte Art und Weise beseitigen . Er verbesserte nämlich die Variante 1 dadurch we¬ sentlich, dass er den einzelnen Greifarm durch zwei Greifarme ersetzte, wel¬ che zudem nicht mehr am Löffelstiel 3 befestigt sind, sondern an der Schau¬ fel 2. Dadurch, dass diese Greifarme 1 am beweglichen Teil, nämlich an der Schaufel befestigt sind, wird erreicht, dass sie automatisch alle Bewegungen mit der Schaufel 2 mitmachen und nicht mehr separat nachgeführt werden müssen . Zusätzlich werden sie sich der Form des Steines anpassen . Da sie hydraulisch gesteuert sind, werden sie den Drehwinkel so lange verändern bis sie mit dem notwendigen Druck den Stein festhalten . Der linke und rech¬ te Dreharm brauchen somit nicht den gleichen Drehwinkel zu haben . Diese beiden Greifarme 1 bilden somit mit der Schaufel 2 eine Zange, welche eine viel bessere Gewähr dafür bieten als die Variante 1 , dass die Steine nicht gleich wieder hinausfallen . Diese Greifarme 1 sind somit eine nützliche Er¬ gänzung zu den gängigen Baggerschaufeln 2.The inventor of the present patent was able to overcome these disadvantages in a clever manner. This is because he significantly improved variant 1 by replacing the individual gripper arm with two gripper arms, which are also no longer attached to the dipper arm 3 but to the bucket 2. By virtue of the fact that these gripper arms 1 are attached to the movable part , namely attached to the blade, it is achieved that they automatically participate in all movements with the blade 2 and no longer have to be tracked separately. In addition, they will adapt to the shape of the stone. Since they are hydraulically controlled, they will change the angle of rotation until they hold the stone with the necessary pressure. The left and right rotary arms therefore do not need to have the same angle of rotation. These two gripper arms 1 thus form a pair of pliers with the shovel 2, which offer a much better guarantee than the variant 1 that the stones do not fall out immediately. These gripping arms 1 are thus a useful addition to the conventional excavator buckets 2.
Der Vorteil dieser Erfindung gegenüber der Variante 2 liegt darin, dass wir hier eine universelle Lösung haben, welche sowohl für den Erdaushub wie für das Aufheben von Steinen geeignet ist.The advantage of this invention compared to variant 2 is that we have a universal solution here that is suitable for both excavating and picking up stones.
Mit Figur 1 wird eine Seitenansicht gezeigt, auf welcher die an der Bagger¬ schaufel befestigten Greifarme 1 ersichtlich sind. Figur 1 zeigt die ganze Anordnung von oben . Die grundlegenden Neuerungen sind nun folgende: Durch die optimale An¬ ordnung der zwei Greif arme 1 und einer entsprechenden Konstruktion, kön¬ nen die Steinzangenarme 1 komplett nach oben geschwenkt werden, so dass auch bei normalen Baggerarbeiten die Steinzangen 1 an der Schaufel ver¬ bleiben können und keine Behinderung darstellen . Durch die Montage der Steinzangen 1 am Drehteil (Schaufel) 2 wird erreicht, dass die Steinzangenar¬ me 1 alle Bewegungen der Schaufel 2 mitmachen . Mit dem hier beschriebenen Patent ist es dem Erfinder gelungen, eine praktische, zweckmässige und gleichzeitig gefahrlose und komfortable Lösung für die anfangs erwähnten Probleme zu finden . Die dabei angewandte einfache Konstruktionsweise gibt gleichzeitig Gewähr für eine kostengünstige Herstellung . Aufgrund dieser erwähnten Zweckmässigkeit, wird diese Steinzange eine schnelle Verbreitung finden . FIG. 1 shows a side view on which the gripping arms 1 attached to the excavator bucket can be seen. Figure 1 shows the whole arrangement from above. The basic innovations are now as follows: Due to the optimal arrangement of the two gripper arms 1 and a corresponding construction, the stone tongs arms 1 can be pivoted completely upward, so that the stone tongs 1 remain on the shovel even during normal excavation work can and do not represent a disability. The assembly of the stone tongs 1 on the rotating part (blade) 2 ensures that the stone tongs arms 1 follow all the movements of the blade 2. With the patent described here, the inventor has succeeded in finding a practical, practical and at the same time safe and comfortable solution to the problems mentioned at the beginning. The simple construction method used at the same time guarantees a cost-effective production. Because of this practicality mentioned, this stone pliers will find a quick spread.

Claims

RA T E N -ΓA N SR R U E C H E RA TEN -ΓA N SR RUECHE
1 . Löffelbagger, mit einem Löffel, der mit einem Löffelstiel schwenkbar ver¬ bunden ist, gekennzeichnet durch zwei Greifarme, von denen jeder unabhän¬ gig vom anderen um eine bezüglich des Löffels feststehende Achse schwenk¬ bar ist, um einen Steinbrocken in den Löffel hineinzudrücken .1 . Backhoe, with a bucket which is pivotally connected to a dipper stick, characterized by two gripping arms, each of which can be pivoted independently of the other about an axis which is fixed with respect to the bucket, in order to press a rock into the bucket.
2. Löffelbagger nach Anspruch 1 . dadurch gekennzeichnet, dass die beiden Greifarme um eine gemeinsame, zur Löffelschwenkachse etwa parallele Achse schwenkbar sind .2. Backhoe according to claim 1. characterized in that the two gripping arms are pivotable about a common axis which is approximately parallel to the bucket pivot axis.
3. Löffelbagger nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass jedem der beiden Greifarme je ein Antriebsmittel zum Verschwenken des Greifarms bezüglich des Löffels zugeordnet ist.3. Backhoe according to claim 1 or 2, characterized in that each of the two gripping arms is assigned a drive means for pivoting the gripping arm with respect to the bucket.
-x. Löffelbagger nach Anspruch 3. dadurch gekennzeichnet, dass die Antriebs¬ mittel hydraulische Zylinder-Kolben-Aggregate sind, die sich jeweils am Löffel oder einem mit diesem starr verbundenen Teil abstützen . -x. Backhoe according to claim 3, characterized in that the drive means are hydraulic cylinder-piston units, each of which is supported on the bucket or a part rigidly connected to it.
PCT/CH1989/000027 1988-05-30 1989-02-16 Stone tongs for excavators WO1989012145A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8989902015T DE58905150D1 (en) 1988-05-30 1989-02-16 STONE PLIERS FOR EXCAVATORS.
AT89902015T ATE92563T1 (en) 1988-05-30 1989-02-16 STONE CLAMPS FOR EXCAVATORS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2051/88-0 1988-05-30
CH205188A CH676480A5 (en) 1988-05-30 1988-05-30

Publications (1)

Publication Number Publication Date
WO1989012145A1 true WO1989012145A1 (en) 1989-12-14

Family

ID=4224777

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1989/000027 WO1989012145A1 (en) 1988-05-30 1989-02-16 Stone tongs for excavators

Country Status (3)

Country Link
EP (1) EP0372013B1 (en)
CH (1) CH676480A5 (en)
WO (1) WO1989012145A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4108315A1 (en) * 1991-03-14 1992-09-24 Josef Maier Earth moving bucket machine - has live boom with working tool of two independently movable grab jaws
DE9310018U1 (en) * 1993-07-06 1993-08-26 Nagler Juergen Excavator bucket handling tool with a shovel
DE4218502A1 (en) * 1992-06-04 1993-12-09 Josef Maier Excavator etc. with movable jib arm
US6742291B2 (en) * 2001-08-06 2004-06-01 Denis Frigon Thumb for scooping tool arm
US7240441B2 (en) 2004-02-12 2007-07-10 Mccoy Ted Excavator thumb for use with excavator equipment
KR101669327B1 (en) 2014-07-30 2016-10-25 이소정 A grab link device for fastening the bucket
KR20200029957A (en) * 2018-09-11 2020-03-19 이창업 Safety grapple for excavtor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU422410B1 (en) * 1966-08-12 1972-03-16 Channel Construction, Inc Clamping device
US4375345A (en) * 1981-07-23 1983-03-01 J. I. Case Company Clamping arm assembly for a backhoe
DE3132392A1 (en) * 1981-08-17 1983-03-03 Krupp Mak Maschinenbau Gmbh, 2300 Kiel Design of earth-moving gear, in particular as attachments for armoured vehicles
US4407626A (en) * 1981-01-30 1983-10-04 Bruckner Peter J Gripping device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU422410B1 (en) * 1966-08-12 1972-03-16 Channel Construction, Inc Clamping device
US4407626A (en) * 1981-01-30 1983-10-04 Bruckner Peter J Gripping device
US4375345A (en) * 1981-07-23 1983-03-01 J. I. Case Company Clamping arm assembly for a backhoe
DE3132392A1 (en) * 1981-08-17 1983-03-03 Krupp Mak Maschinenbau Gmbh, 2300 Kiel Design of earth-moving gear, in particular as attachments for armoured vehicles

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4108315A1 (en) * 1991-03-14 1992-09-24 Josef Maier Earth moving bucket machine - has live boom with working tool of two independently movable grab jaws
DE4218502A1 (en) * 1992-06-04 1993-12-09 Josef Maier Excavator etc. with movable jib arm
DE9310018U1 (en) * 1993-07-06 1993-08-26 Nagler Juergen Excavator bucket handling tool with a shovel
WO1995002095A1 (en) * 1993-07-06 1995-01-19 Nagler Juergen Manipulating tool on a mechanical shovel with a bucket
US6742291B2 (en) * 2001-08-06 2004-06-01 Denis Frigon Thumb for scooping tool arm
US7240441B2 (en) 2004-02-12 2007-07-10 Mccoy Ted Excavator thumb for use with excavator equipment
KR101669327B1 (en) 2014-07-30 2016-10-25 이소정 A grab link device for fastening the bucket
KR20200029957A (en) * 2018-09-11 2020-03-19 이창업 Safety grapple for excavtor
KR102105204B1 (en) 2018-09-11 2020-04-27 이창업 Safety grapple for excavtor

Also Published As

Publication number Publication date
EP0372013B1 (en) 1993-08-04
EP0372013A1 (en) 1990-06-13
CH676480A5 (en) 1991-01-31

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