EP0126927B1 - Supporting fork, especially for a stacker truck - Google Patents

Supporting fork, especially for a stacker truck Download PDF

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Publication number
EP0126927B1
EP0126927B1 EP19840104052 EP84104052A EP0126927B1 EP 0126927 B1 EP0126927 B1 EP 0126927B1 EP 19840104052 EP19840104052 EP 19840104052 EP 84104052 A EP84104052 A EP 84104052A EP 0126927 B1 EP0126927 B1 EP 0126927B1
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EP
European Patent Office
Prior art keywords
rubber
holding claw
groove
fork according
fork
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
EP19840104052
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German (de)
French (fr)
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EP0126927A3 (en
EP0126927A2 (en
Inventor
Helmut Dipl.-Ing. Stich
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.)
Carl Falkenroth Sohne & Co KG GmbH
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Carl Falkenroth Sohne & Co KG GmbH
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Publication of EP0126927A2 publication Critical patent/EP0126927A2/en
Publication of EP0126927A3 publication Critical patent/EP0126927A3/en
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Publication of EP0126927B1 publication Critical patent/EP0126927B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members

Definitions

  • the invention relates to a carrying fork for, in particular, forklift trucks, with fork shaft and fork tines, the fork shaft having an upper and a lower holding claw with the grooves lying opposite one another for gripping over and under a fork carrier (see, for example, DE-B-2 049 414 ).
  • a constant problem with the use of forklift trucks is the noise pollution. This is because the carrying forks, as it were suspended on the fork carriage with their holding claws, tend to rattle, particularly when unloaded when the mast is working or when the forklift is moved. This rattling essentially results from the play of movement between the groove and the fork carriage of the lower holding claw, because the support forks with the grooved holding claws are pushed onto the fork carriage and are consequently suspended from the upper holding claw, while movement play inevitably arises at the lower holding claw.
  • the invention has for its object to equip a carrying fork for in particular lift trucks of the type described in such a way that perfect noise protection in use on the fork carriage is always ensured in a simple and functional manner.
  • the invention in the case of a generic fork in that the upper and / or lower holding claw has a shock absorber which is effective against the fork carrier.
  • the shock absorber is designed as a rubber or plastic nut and at least the groove of the lower holding claw is lined with this rubber or plastic nut.
  • the rubber or plastic nut can be vulcanized into at least the groove of the lower holding claw or sprayed on as a plastic coating.
  • the rubber or plastic nut is designed as an independent U-shaped component with an insertion groove corresponding to the groove of the holding claw for the fork carriage, the U-leg facing the steerer tube being pulled up and the steerer tube on both sides overarching bends.
  • a fitting component is realized as a rubber or plastic nut, on the other hand, the rubber or plastic nut can be easily replaced after wear.
  • the rubber or plastic nut can be releasably clamped into the groove of the holding claw as a replaceable component by means of a snap fit.
  • the rest seat can be realized in various ways, you will regularly provide rest seat cams and corresponding rest seat recesses.
  • the rubber or plastic nut is particularly suitable due to its elasticity for the realization of a resting seat connection.
  • the rubber or plastic nut is about 2 mm to 3 mm thick, for example, polyurethane or polyvinyl chloride can be used as the plastic.
  • the shock absorber is designed as a mechanically, pneumatically or hydraulically operating cylinder piston arrangement, the piston rod projecting from the cylinder carrying a clamping jaw working against the fork carriage.
  • a shock absorber With the help of a shock absorber, a releasable clamp fit between the holding claw and the fork carriage and consequently a tight, motion-free seat is achieved. Due to the resilience of the shock absorber, the movement that is required to move the suspension fork on the fork carriage is still available if necessary.
  • a mechanical shock absorber for example, is a friction damper with only one pressure stage, but single or twin-tube dampers are also conceivable.
  • such a shock absorber also fulfills the function of a tensioning device.
  • the shock absorber is designed as a tensioning pin with a clamping jaw for the fork carriage, which is guided in the holding claw and acted on by a compression spring.
  • the Shock absorbers must be equipped with a reset device, e.g. B. in the latter case have a pivotally mounted reset lever on the free clamping bolt end, so that when the reset lever is actuated, the clamping jaw is released and consequently the holding claw in question is released for moving the carrying fork on the fork carriage.
  • a carrying fork for in particular forklift trucks of the type described above is realized, which is characterized by optimal noise protection because the otherwise disturbing rattling phenomena between the carrying fork or its holding claws and in particular its lower holding claw against the fork carriage.
  • This can be achieved either by lining with a rubber or plastic nut or by using a shock absorber with a clamping jaw, which therefore ensures that the holding claws are clamped on the fork carriage so that they are as flexible as possible, so that the play of movement causing the rattling is eliminated after the suspension fork has been installed. however, it is always available for mounting and adjusting the carrying fork on the equipment rack.
  • noise protection is achieved in a relatively simple and functional manner.
  • a carrying fork for in particular forklift trucks is shown, specifically with fork shaft 1 and fork tines 2, the fork shaft 1 having an upper and a lower holding claw 3a, 3b with mutually opposite grooves 4 for engaging over and under an indicated fork carrier 5.
  • the upper and / or lower holding claw 3a or 3b has a shock absorber 6 which acts against the fork carriage 5.
  • only the lower holding claw 3b is equipped with such a shock absorber 6.
  • the shock absorber is designed as a rubber or plastic nut 6a and the groove 4 of the lower holding claw 3b is lined with this rubber or plastic nut 6a.
  • the rubber or plastic nut 6a is designed as a U-shaped component with an insertion groove 7 corresponding to the groove 4 of the holding claw 3b for the fork carriage 5, the U-leg 8 facing the steerer tube 1 being pulled up and angled portions 9 overlapping the steerer tube 1 on both sides having.
  • the rubber or plastic nut 6a as a replaceable component can be releasably clamped into the groove 4 of the holding claw 3b by means of a snap fit.
  • the rubber or plastic nut 6a is approximately 2 mm to 3 mm thick.
  • the shock absorber is designed as a tensioning bolt 13, which is guided in the holding claw 3b and acted on by a compression spring 10, with a clamping jaw 11 working against the fork carriage 5, the tensioning bolt 13 having a pivotably mounted reset lever 12 at its free end to be able to release the holding claw 3b relative to the fork carriage 5 for adjusting the carrying fork.
  • the shock absorber 6 is designed as a mechanically, pneumatically or hydraulically operating cylinder piston arrangement, the piston rod protruding from the cylinder also carrying a clamping jaw working against the fork carriage.
  • the shock absorber itself is designed as an intermediate noise insulation layer, with the insulation material at least the groove 4 of the lower holding claw 3b is formed, this insulation material can also be made of a material other than rubber or plastic, e.g. B. made of a material from the brake shoes. Consequently, other lining 6a as a rubber or plastic nut are also suitable for the groove 4 if only noise insulation is achieved.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Description

Die Erfindung betrifft eine Traggabel für insbesondere Hubstapler, mit Gabelschaft und Gabelzinken, wobei der Gabelschaft eine obere und eine untere Halteklaue mit sich gegenüberlieger den Nuten zum Über- und Untergreifen eines Gabelträgers aufweist, (siehe z. B. DE-B-2 049 414).The invention relates to a carrying fork for, in particular, forklift trucks, with fork shaft and fork tines, the fork shaft having an upper and a lower holding claw with the grooves lying opposite one another for gripping over and under a fork carrier (see, for example, DE-B-2 049 414 ).

Ein ständiges Problem beim Einsatz von Hub- bzw. Gabelstaplern besteht in der Lärmbelästigung. Denn die auf dem Gabelträger mit ihren Halteklauen gleichsam aufgehängten Traggabeln neigen insbesondere in unbelastetem Zustand bei arbeitendem Hubgerüst oder bei Verfahren des Hubstaplers zum Klappern. Dieses Klappern resultiert im wesentlichen aus dem Bewegungsspiel zwischen Nut und Gabelträger der jeweils unteren Halteklaue, weil die Traggabeln mit den genuteten Halteklauen auf den Gabelträger aufgeschoben werden, folglich an der oberen Halteklaue gleichsam aufgehängt sind, während sich an der unteren Halteklaue zwangsläufig Bewegungsspiel einstellt. Zwar kennt man Schraubbefestigungen, um dieses Bewegungsspiel zu eliminieren und folglich ein Klappern der Traggabeln zu vermeiden, jedoch werden derartige Schraubbefestigungen nach dem Lösen zum Verstellen der Traggabeln auf dem Gabelträger erfahrungsgemäß nur selten wieder angezogen, häufig gehen sogar Schraubenteile verloren, so daß die Schraubbefestigungen alsbald funktionsuntüchtig werden. Im Ergebnis sind derartige Schraubbefestigungen kein geeignetes Lärmschutzmittel. - Hier will die Erfindung Abhilfe schaffen.A constant problem with the use of forklift trucks is the noise pollution. This is because the carrying forks, as it were suspended on the fork carriage with their holding claws, tend to rattle, particularly when unloaded when the mast is working or when the forklift is moved. This rattling essentially results from the play of movement between the groove and the fork carriage of the lower holding claw, because the support forks with the grooved holding claws are pushed onto the fork carriage and are consequently suspended from the upper holding claw, while movement play inevitably arises at the lower holding claw. Although screw fastenings are known to eliminate this play of movement and consequently to avoid rattling of the support forks, experience has shown that such screw fastenings are rarely tightened again after loosening to adjust the support forks on the fork carriage, and even screw parts are often lost, so that the screw fastenings are lost at once become inoperable. As a result, such screw fastenings are not a suitable noise protection means. - The invention seeks to remedy this.

Der Erfindung liegt die Aufgabe zugrunde, eine Traggabel für insbesondere Hubstapler der eingangs beschriebenen Art derart auszurüsten, daß stets einwandfreier Lärmschutz im Einsatz auf dem Gabelträger in einfacher und funktionsgerechter Weise gewährleistet ist.The invention has for its object to equip a carrying fork for in particular lift trucks of the type described in such a way that perfect noise protection in use on the fork carriage is always ensured in a simple and functional manner.

Diese Aufgabe löst die Erfindung bei einer gattungsgemäßen Traggabel dadurch, daß die obere und/oder untere Halteklaue einen gegen den Gabelträger wirksamen Stoßdämpfer aufweist. Nach einer Ausführungsform der Erfindung ist der Stoßdämpfer als Gummi- oder Kunststoffutter ausgebildet und mit diesem Gummi- oder Kunststoffutter zumindest die Nut der unteren Halteklaue ausgekleidet. - Durch diese Maßnahmen der Erfindung wird gleichsam automatisch das Bewegungsspiel zwischen der unteren Halteklaue und dem Gabelträger weitgehend reduziert, wird darüber hinaus zugleich ein Polstereffekt zwischen Halteklaue und Gabelträger derart erreicht, daß das Gummi-oder Kunststoffutter als Lärmschutzeinlage funktioniert. Folglich kann man bei Einsatz eines erfindungsgemäßen Gummi- oder Kunststoffutters durchaus noch ein geringfügiges Bewegungsspiel zwischen Halteklaue und Gabelträger in Kauf nehmen, wie es zum Verschieben der Traggabel auf dem Gabelträger erforderlich ist, ohne daß jedoch Lärmbelästigungen auftreten, weil das sonst störende Klappern zwischen Halteklaue und Gabelträger durch den Polstereffekt unterbunden wird.This object is achieved by the invention in the case of a generic fork in that the upper and / or lower holding claw has a shock absorber which is effective against the fork carrier. According to one embodiment of the invention, the shock absorber is designed as a rubber or plastic nut and at least the groove of the lower holding claw is lined with this rubber or plastic nut. - Through these measures of the invention, as it were, the movement between the lower holding claw and the fork carriage is automatically largely reduced, moreover a cushioning effect between the holding claw and fork carriage is achieved in such a way that the rubber or plastic nut functions as a noise protection insert. Consequently, when using a rubber or plastic nut according to the invention, a slight amount of movement between the holding claw and the fork carriage can still be accepted, as is necessary for moving the carrying fork on the fork carriage, but without any noise nuisance because the otherwise annoying rattling between the holding claw and Fork carrier is prevented by the cushion effect.

Weitere Merkmale sind im folgenden aufgeführt. So kann das Gummi- oder Kunststoffutter in zumindest die Nut der unteren Halteklaue einvulkanisiert oder als Kunststoffbeschichtung aufgespritzt sein. Nach besonderer Empfehlung der Erfindung ist jedoch vorgesehen, daß das Gummi- oder Kunststoffutter als ein selbständiges U-förmiges Bauteil mit einer der Nut der Halteklaue entsprechenden Einschubnut für den Gabelträger ausgebildet ist, wobei der dem Gabelschaft zugewandte U-Schenkel hochgezogen ist und beidseitig den Gabelschaft übergreifende Abwinklungen aufweist. Auf diese Weise wird einerseits ein paßgerechtes Bauteil als Gummi-oder Kunststoffutter verwirklicht, läßt sich andererseits das Gummi- oder Kunststoffutter nach Verschleiß unschwer auswechseln. Das gilt insbesondere dann, wenn erfindungsgemäß das Gummi- oder Kunststoffutter als auswechselbares Bauteil mittels Rastsitz in die Nut der Halteklaue lösbar einklemmbar ist. Der Rastsitz läßt sich auf verschiedene Weise verwirklichen, regelmäßig wird man Rastsitznocken und entsprechende Rastsitzausnehmungen vorsehen. Hinzu kommt, daß das Gummi- oder Kunststoffutter aufgrund seiner Elastizität für die Verwirklichung einer Rastsitzverbindung besonders geeignet ist. Im übrigen ist das Gummi- oder Kunststoffutter ca. 2 mm bis 3 mm dick, wobei als Kunststoff beispielsweise Polyuretan oder Polyvinylchlorid in Frage kommt.Other features are listed below. For example, the rubber or plastic nut can be vulcanized into at least the groove of the lower holding claw or sprayed on as a plastic coating. According to a special recommendation of the invention, however, it is provided that the rubber or plastic nut is designed as an independent U-shaped component with an insertion groove corresponding to the groove of the holding claw for the fork carriage, the U-leg facing the steerer tube being pulled up and the steerer tube on both sides overarching bends. In this way, on the one hand a fitting component is realized as a rubber or plastic nut, on the other hand, the rubber or plastic nut can be easily replaced after wear. This applies in particular if, according to the invention, the rubber or plastic nut can be releasably clamped into the groove of the holding claw as a replaceable component by means of a snap fit. The rest seat can be realized in various ways, you will regularly provide rest seat cams and corresponding rest seat recesses. In addition, the rubber or plastic nut is particularly suitable due to its elasticity for the realization of a resting seat connection. In addition, the rubber or plastic nut is about 2 mm to 3 mm thick, for example, polyurethane or polyvinyl chloride can be used as the plastic.

Nach einer abgewandelten Ausführungsform der Erfindung ist vorgesehen, daß der Stoßdämpfer als mechanisch, pneumatisch oder hydraulisch arbeitende Zylinderkolbenanordnung ausgebildet ist, deren aus dem Zylinder vorkragende Kolbenstange eine gegen den Gabelträger arbeitende Spannbacke trägt. In diesem Fall wird mit Hilfe eines Stoßdämpfers also ein lösbarer Klemmsitz zwischen Halteklause und Gabelträger und folglich ein strammer, bewegungsfreier Sitz verwirklicht. Aufgrund der Nachgiebigkeit des Stoßdämfers steht dennoch im Bedarfsfall jenes Bewegungsspiel zur Verfügung, welches zum Verschieben der Traggabel auf dem Gabelträger erforderlich ist. Als mechanischer Stoßdämpfer kommt beispielsweise ein Reibungsdämpfer mit lediglich einer Druckstufe in Frage, jedoch sind auch Ein-oder Zweirohrdämpfer denkbar. Jedenfalls erfüllt nach Lehre der Erfindung ein solcher Stoßdämpfer zugleich die Funktion einer Spannvorrichtung. In besonders einfacher Ausführungsform gelingt das dann, wenn der Stoßdämpfer als in der Halteklaue geführter und von einer Druckfeder beaufschlagter Spannbolzen mit Spannbacke für den Gabelträger ausgebildet ist. Außerdem kann der Stoßdämpfer mit einer Rückstellvorrichtung ausgerüstet sein, z. B. im letzteren Fall einen an dem freien Spannbolzenende schwenkbar gelagerten Rückstellhebel aufweisen, so daß bei Betätigung des Rückstellhebels die Spannbacke gelöst und folglich die betreffende Halteklaue zum Verschieben der Traggabel auf dem Gabelträger freigegeben wird.According to a modified embodiment of the invention it is provided that the shock absorber is designed as a mechanically, pneumatically or hydraulically operating cylinder piston arrangement, the piston rod projecting from the cylinder carrying a clamping jaw working against the fork carriage. In this case, with the help of a shock absorber, a releasable clamp fit between the holding claw and the fork carriage and consequently a tight, motion-free seat is achieved. Due to the resilience of the shock absorber, the movement that is required to move the suspension fork on the fork carriage is still available if necessary. A mechanical shock absorber, for example, is a friction damper with only one pressure stage, but single or twin-tube dampers are also conceivable. In any case, according to the teaching of the invention, such a shock absorber also fulfills the function of a tensioning device. In a particularly simple embodiment, this is achieved if the shock absorber is designed as a tensioning pin with a clamping jaw for the fork carriage, which is guided in the holding claw and acted on by a compression spring. In addition, the Shock absorbers must be equipped with a reset device, e.g. B. in the latter case have a pivotally mounted reset lever on the free clamping bolt end, so that when the reset lever is actuated, the clamping jaw is released and consequently the holding claw in question is released for moving the carrying fork on the fork carriage.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, daß eine Traggabel für insbesondere Hubstapler der eingangs beschriebenen Art verwirklicht wird, die sich durch optimalen Lärmschutz auszeichnet, weil die sonst störenden Klappererscheinungen zwischen der Traggabel bzw. ihren Halteklauen und insbesondere ihrer unteren Halteklaue gegen den Gabelträger unterbunden werden. Das gelingt entweder durch die Auskleidung mit einem Gummi- oder Kunststoffutter oder durch den Einsatz eines Stoßdämpfers mit Spannbacke, der also für ein gleichsam nachgiebiges Festspannen der Halteklauen auf dem Gabelträger sorgt, so daß jenes die Klappererscheinungen erzeugende Bewegungsspiel nach erfolgter Montage der Traggabel eliminiert wird, jedoch für die Montage und das Einstellen der Traggabel auf dem Geräteträger stets zur Verfügung steht. Im ganzen wird nach Lehre der Erfindung in verhältnismäßig einfacher und funktionsgerechter Weise Lärmschutz erreicht.The advantages achieved by the invention are essentially to be seen in the fact that a carrying fork for in particular forklift trucks of the type described above is realized, which is characterized by optimal noise protection because the otherwise disturbing rattling phenomena between the carrying fork or its holding claws and in particular its lower holding claw against the fork carriage. This can be achieved either by lining with a rubber or plastic nut or by using a shock absorber with a clamping jaw, which therefore ensures that the holding claws are clamped on the fork carriage so that they are as flexible as possible, so that the play of movement causing the rattling is eliminated after the suspension fork has been installed. however, it is always available for mounting and adjusting the carrying fork on the equipment rack. On the whole, according to the teaching of the invention, noise protection is achieved in a relatively simple and functional manner.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert; es zeigen:

  • Fig. 1 eine erfindungsgemäße Traggabel auf einem angedeuteten Gabelträger, wobei die untere Halteklaue einen Stoßdämpfer aufweist,
  • Fig. 2 einen vergrößerten Ausschnitt aus dem Gegenstand nach Fig. 1 mit einem als Kunststoffutter ausgebildeten Stoßdämpfer als auswechselbares Bauteil in Seitenansicht,
  • Fig. 3 den Gegenstand nach Fig. 2 in Ansicht von oben,
  • Fig. 4 den Gegenstand nach Fig. 1 mit einem mechanischen Stoßdämpfer und
  • Fig. 5 den Gegenstand nach Fig. 4 in Ansicht von oben.
In the following the invention is explained in more detail with reference to a drawing showing only one embodiment; show it:
  • 1 is a carrying fork according to the invention on an indicated fork carriage, the lower holding claw having a shock absorber,
  • 2 is an enlarged section of the object of FIG. 1 with a shock absorber designed as a plastic nut as a replaceable component in side view,
  • 3 the object according to FIG. 2 in a view from above,
  • Fig. 4 shows the object of FIG. 1 with a mechanical shock absorber and
  • Fig. 5 shows the object of FIG. 4 in a view from above.

In den Figuren ist eine Traggabel für insbesondere Hubstapler dargestellt, und zwar mit Gabelschaft 1 und Gabelzinken 2, wobei der Gabelschaft 1 eine obere und eine untere Halteklaue 3a, 3b mit sich gegenüberliegenden Nuten 4 zum Über- und Untergreifen eines angedeuteten Gabelträgers 5 aufweist. Die obere und/oder untere Halteklaue 3a bzw. 3b weist einen gegen den Gabelträger 5 wirksamen Stoßdämpfer 6 auf. Nach dem Ausführungsbeispiel ist lediglich die untere Halteklaue 3b mit einem solchen Stoßdämpfer 6 ausgerüstet.In the figures, a carrying fork for in particular forklift trucks is shown, specifically with fork shaft 1 and fork tines 2, the fork shaft 1 having an upper and a lower holding claw 3a, 3b with mutually opposite grooves 4 for engaging over and under an indicated fork carrier 5. The upper and / or lower holding claw 3a or 3b has a shock absorber 6 which acts against the fork carriage 5. According to the exemplary embodiment, only the lower holding claw 3b is equipped with such a shock absorber 6.

Nach einer Ausführungsform ist der Stoßdämpfer als Gummi- oder Kunststoffutter 6a ausgebildet und mit diesem Gummi- oder Kunststoffutter 6a die Nut 4 der unteren Halteklaue 3b ausgekleidet. Das Gummi- oder Kunststoffutter 6a ist als ein U-förmiges Bauteil mit einer der Nut 4 der Halteklaue 3b entsprechenden Einschubnut 7 für den Gabelträger 5 ausgebildet, wobei der dem Gabelschaft 1 zugewandte U-Schenkel 8 hochgezogen ist und beidseitig den Gabelschaft 1 übergreifende Abwinklungen 9 aufweist. Grundsätzlich besteht die Möglichkeit, das Gummi- oder Kunststoffutter 6a als Bauteil adhäsiv mit der betreffenden Halteklaue 3b zu verbinden, z. B. in ihre Nut 4 einzukleben. Dargestellt und bevorzugt wird jedoch eine Ausführungsform, wonach das Gummi- oder Kunststoffutter 6a als auswechselbares Bauteil mittels Rastsitz in die Nut 4 der Halteklaue 3b lösbar einklemmbar ist. Das Gummi- oder Kunststoffutter 6a ist ca. 2 mm bis 3 mm dick.According to one embodiment, the shock absorber is designed as a rubber or plastic nut 6a and the groove 4 of the lower holding claw 3b is lined with this rubber or plastic nut 6a. The rubber or plastic nut 6a is designed as a U-shaped component with an insertion groove 7 corresponding to the groove 4 of the holding claw 3b for the fork carriage 5, the U-leg 8 facing the steerer tube 1 being pulled up and angled portions 9 overlapping the steerer tube 1 on both sides having. Basically, there is the possibility of adhesively connecting the rubber or plastic nut 6a as a component to the relevant holding claw 3b, for. B. glued into their groove 4. However, an embodiment is shown and preferred, according to which the rubber or plastic nut 6a as a replaceable component can be releasably clamped into the groove 4 of the holding claw 3b by means of a snap fit. The rubber or plastic nut 6a is approximately 2 mm to 3 mm thick.

Nach einer abgewandelten Ausführungsform der Erfindung ist der Stoßdämpfer als in der Halteklaue 3b geführter und von einer Druckfeder 10 beaufschlagter Spannbolzen 13 mit einer gegen den Gabelträger 5 arbeitenden Spannbacke 11 ausgebildet, wobei der Spannbolzen 13 an seinem freien Ende einen schwenkbar gelagerten Rückstellhebel 12 aufweist, um die Halteklaue 3b gegenüber dem Gabelträger 5 zum Verstellen der Traggabel freigeben zu können. - Nicht dargestellt sind die anderen Möglichkeiten, wonach der Stoßdämpfer 6 als mechanisch, pneumatisch oder hydraulisch arbeitende Zylinderkolbenanordnung ausgebildet ist, deren aus dem Zylinder vorkragende Kolbenstange ebenfalls eine gegen den Gabelträger arbeitende Spannbacke trägt.According to a modified embodiment of the invention, the shock absorber is designed as a tensioning bolt 13, which is guided in the holding claw 3b and acted on by a compression spring 10, with a clamping jaw 11 working against the fork carriage 5, the tensioning bolt 13 having a pivotably mounted reset lever 12 at its free end to be able to release the holding claw 3b relative to the fork carriage 5 for adjusting the carrying fork. - The other options are not shown, according to which the shock absorber 6 is designed as a mechanically, pneumatically or hydraulically operating cylinder piston arrangement, the piston rod protruding from the cylinder also carrying a clamping jaw working against the fork carriage.

Selbverständlich ist es auch möglich, daß der Stoßdämpfer selbst als eine Lärmdämmzwischenschicht ausgebildet ist, mit deren Dämmstoff zumindest die Nut 4 der unteren Halteklaue 3b ausgebildet ist, wobei dieser Dämmstoff auch aus einem anderen Werkstoff als Gummi oder Kunststoff bestehen kann, z. B. aus einem Werkstoff, aus dem Bremsbacken bestehen. Folglich kommen für die Nut 4 auch andere Futter 6a als Gummi- oder Kunststoffutter in Frage, wenn nur Lärmdämmung erreicht wird.Of course, it is also possible that the shock absorber itself is designed as an intermediate noise insulation layer, with the insulation material at least the groove 4 of the lower holding claw 3b is formed, this insulation material can also be made of a material other than rubber or plastic, e.g. B. made of a material from the brake shoes. Consequently, other lining 6a as a rubber or plastic nut are also suitable for the groove 4 if only noise insulation is achieved.

Claims (10)

1. A lifting form, particularly for a stacker truck, with forked shaft (1) and forked prong (2), in which the forked shaft possesses an upper and a lower holding claw (3a, 3b) with opposite grooves (4) to grip a fork support (5) above and below, characterised in that the upper and/or lower holding claw (3a and 3b) possesses a shock-absorber (6) acting against tbe fork support (5).
2. A lifting fork according to Claim 1, characterised in that the shock-absorber is constructed as a rubber or plastics lining (6a) and at least groove (4) of the lower holding claw (3b) is cladded by this rubber or plastics lining (6a).
3. A lifting fork according to Claim 1 or 2, characterised in that the rubber or plastics lining (6a), at least in groove (4) of the lower holding jaw (3b) is vulcanised in position or sprayed on as a plastics coating.
4. A lifting fork according to Claim 1 or 2, cbaracterised in that the rubber or plastics lining (6a) is formed as a U-shaped component with a push-fit groove (7) for the fork support (5) corresponding to groove (4) of bolding claw (3b), the U-limb (8) facing the forked shaft (1) being vertically extended and possessing turned-in ends (9) gripping forked shaft (1) on both sides.
5. A lifting fork according to one of Claims 1, 2 or 4, characterised in that the rubber or plastics lining (6a), as a component, is attached to the corresponding holding claw (3b) by adhesive, e.g., is cemented into its groove (4).
6. A lifting fork according to one of Claims 1, 2 or 4, characterised in that the rubber or plastics lining (6a), as a component, can be squeezed by a notched seating into the groove (4) of the holding claw (3b) so that it is detachable.
7. A lifting fork according to one of Claims 1 to 6, characterised in that the rubber or plastics lining (6a) is about 2 to 3 mm thick.
8. A lifting fork according to Claim 1, characterized in that the shock-absorber (6) is a mechanically, pneumatically or hydraulically operable piston and cylinder device, the piston rod of which projects from the cylinder and carries a clamping jaw (11) acting against the fork support (5).
9. A lifting fork according to Claim 1, characterised in that the shock-absorber is formed as a clamping stud (13) supported in the holding claw (3b) and loaded by a compression spring (10) with a clamping jaw (11) for fork support (5).
10. A lifting fork according to one of Claims 1, 8 or 9, characterised in that shock-absorber (6) is provided with a retraction device, e.g., possesses a retraction lever (12) mounted on a swivel at the free end of the clamping stud.
EP19840104052 1983-05-20 1984-04-11 Supporting fork, especially for a stacker truck Expired EP0126927B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833318388 DE3318388C2 (en) 1983-05-20 1983-05-20 Carrying fork for in particular forklift trucks
DE3318388 1983-05-20

Publications (3)

Publication Number Publication Date
EP0126927A2 EP0126927A2 (en) 1984-12-05
EP0126927A3 EP0126927A3 (en) 1986-01-29
EP0126927B1 true EP0126927B1 (en) 1988-02-03

Family

ID=6199474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840104052 Expired EP0126927B1 (en) 1983-05-20 1984-04-11 Supporting fork, especially for a stacker truck

Country Status (2)

Country Link
EP (1) EP0126927B1 (en)
DE (1) DE3318388C2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4911607A (en) * 1986-08-19 1990-03-27 Kenhar Products Incorporated Lift truck fork
US5120188A (en) * 1990-11-29 1992-06-09 Kenhar Products Inc. Fork stabilizing device
DE19615535C2 (en) * 1996-04-19 2003-04-30 Vetter Umformtechnik Gmbh forks
DE102004040529A1 (en) * 2004-08-20 2006-02-23 Jungheinrich Ag Truck with fork damper
DE102012108824A1 (en) 2012-09-19 2014-03-20 Linde Material Handling Gmbh Attachment for mobile working machine, has clamping device with piston arrangement that is provided with piston, displaceable pressure piece and spring device, where piston is engaged with fork carriage of working machine
DE102013101683A1 (en) 2013-02-20 2014-08-21 Linde Material Handling Gmbh Industrial truck e.g. counterbalance forklift, has noise damping device which is provided with clamping device for clamping implement to lifting slide
CN107542123A (en) * 2017-09-27 2018-01-05 江苏柳工机械有限公司 Combine the prong locking device of bucket

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3075665A (en) * 1960-12-05 1963-01-29 Clark Equipment Co Adjustable load engaging means for lift truck
US3080080A (en) * 1961-07-20 1963-03-05 Paul O Miller Shock absorbing attachment for fork lift trucks
DE2049414C3 (en) * 1970-10-08 1974-08-29 O & K Orenstein & Koppel Ag, 1000 Berlin Shock-absorbing suspension of a lifting carriage for a lift truck
DE7727309U1 (en) * 1977-09-03 1977-12-22 Roehm Gmbh, 6100 Darmstadt SPRING DEVICE FOR NOISE REDUCTION IN FORKLIFTS

Also Published As

Publication number Publication date
EP0126927A3 (en) 1986-01-29
DE3318388C2 (en) 1985-04-04
DE3318388A1 (en) 1984-11-29
EP0126927A2 (en) 1984-12-05

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