EP0199116B1 - Loader with a horizontally movable mast assembly - Google Patents

Loader with a horizontally movable mast assembly Download PDF

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Publication number
EP0199116B1
EP0199116B1 EP86103979A EP86103979A EP0199116B1 EP 0199116 B1 EP0199116 B1 EP 0199116B1 EP 86103979 A EP86103979 A EP 86103979A EP 86103979 A EP86103979 A EP 86103979A EP 0199116 B1 EP0199116 B1 EP 0199116B1
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EP
European Patent Office
Prior art keywords
lifting unit
lever
frame
push frame
lifting mechanism
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
EP86103979A
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German (de)
French (fr)
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EP0199116A1 (en
Inventor
Helmut Alber
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.)
Wagner Foerdertechnik GmbH and Co KG
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Wagner Foerdertechnik GmbH and Co KG
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Application filed by Wagner Foerdertechnik GmbH and Co KG filed Critical Wagner Foerdertechnik GmbH and Co KG
Priority to AT86103979T priority Critical patent/ATE34555T1/en
Publication of EP0199116A1 publication Critical patent/EP0199116A1/en
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Publication of EP0199116B1 publication Critical patent/EP0199116B1/en
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Classifications

    • 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
    • B66F9/08—Masts; Guides; Chains
    • B66F9/082—Masts; Guides; Chains inclinable
    • 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
    • B66F9/08—Masts; Guides; Chains
    • B66F9/10—Masts; Guides; Chains movable in a horizontal direction relative to truck

Definitions

  • the invention relates to a push truck with a double-arm lifting mechanism that is tiltably mounted in a push frame.
  • a thrust member in particular a hydraulic cylinder, between the vehicle frame and the thrust frame and a tilting member also formed as a hydraulic cylinder are arranged between the latter and the lower lever arm of the lifting mechanism.
  • the aim is to keep the length of the truck as short as possible in order to achieve a narrow aisle width in the warehouse.
  • the width of the aisle is determined by the length of the vehicle body plus the load length and a safety distance of 2 x 100 mm.
  • the pivotal connection of the thrust member to the push frame takes place via one end of a double-armed, pivotally mounted cross lever on the push frame, the other end of which is pivotally attached to the lower lever arm of the lifting mechanism. If, in this construction, with a fixed thrust member, the lifting mechanism is inclined, then the lifting mechanism takes the end of the transverse lever connected to it and pivots it about its push frame axis. The other end of the lever arm presses off on the fixed pushing element and inevitably moves the pushing frame in the extending direction, so that the distance between the lifting mechanism and the vehicle frame increases or its minimum size is maintained.
  • the articulation of the cross lever on the lifting mechanism takes place at the connection point between the lifting mechanism and the tilt link, so that an additional pivot axis is saved.
  • this pivot axis is expedient to arrange this pivot axis on a coupling rod connected to the frame. This is preferably longitudinally adjustable in order to be able to shift the position of the pivot axis, in particular to compensate for manufacturing tolerances.
  • the extent of the longitudinal adjustment of the push frame when tilting the lifting mechanism depends on the length of the two lever arms of the cross lever. A constant safety distance is obtained when both lever arms are of the same length. It is also advantageous if the height distance of the swivel axis of the lifting mechanism from the connection point with the tilting link is made the same size as the distance from this axis of rotation to the highest, most protruding edge of the vehicle.
  • a push frame 3 On the vehicle frame 1 of the push stacker, a push frame 3 is mounted so as to be longitudinally displaceable via rollers 2, the movements of which are carried out via the piston 4 of a thrust member designed as a hydraulic cylinder 5.
  • the push frame 3 is provided at its front free end on both sides with vertically arranged supports 6, on which the lifting mechanism 7 is mounted tiltable about the axis 8.
  • the tilt angle is set by the piston 9 of a tilt member, which is also designed as a hydraulic cylinder 10.
  • the load suspension device 11 is arranged on the lifting mechanism 7 so that it can be raised and lowered.
  • the vehicle body consists of the driver's seat 12, which is only indicated schematically, and the battery compartment 13 in front of it.
  • the length L 2 of the vehicle body is determined from the length A of the driver's seat 12, the length B of the battery compartment 13 and the width D of the lifting mechanism 7 and the safety distance C, between the hoist 7 and the battery compartment 13. Since the length of the load suspension device 11, and thus also of the vehicle frame 1, is determined by the size of the load to be picked up and is therefore not changeable, a narrow aisle width must be achieved in Bear the length L 2 as short as possible.
  • the safety distance C between the lifting mechanism 7 and the battery space 13 changes in the known embodiments when the lifting mechanism 7 is inclined towards the vehicle body. It must therefore be kept so large that the prescribed dimension is maintained even with an inclined lifting mechanism 7. As a result, it will usually be larger than necessary when the hoist 7 is vertical.
  • the thrust member 4, 5 is connected on the one hand via a bearing block 14 to the vehicle frame 1 and on the other hand via a double-armed transverse lifting device 15 to the lifting mechanism 7, specifically via a bearing block 16.
  • the piston of the tilt member 9, 10 is also articulated, the cylinder 10 of which is connected to the push frame 3 via a bearing block 17.
  • the cross lever 15 is pivotally mounted about the axis 18, which in turn is connected to the push frame 3 via the coupling rod 19 and the bearing block 20.
  • the tilting member 9, 10 is fixed independently of the set tilting angle of the lifting mechanism 7 and the piston 4 of the pushing member 4, 5 is shifted, then the pushing frame 3 moves to the right or left in the plane of the drawing.
  • the push element 4, 5 is fixed, the tilt angle of the lifting mechanism 7 is changed relative to the vertical position according to FIG. 1, then the bearing block 16 moves together with the piston 9, as shown in FIG. 3, in the drawing plane to the right, so that the cross lever 15 is pivoted counterclockwise around the connecting axis 23 on the thrust member 4, 5. Since the push element 4, 5 is fixed, the push frame 3 is moved to the right in the plane of the drawing via the coupling rod 19.
  • the inclination of the lifting mechanism 7 would in itself reduce the safety distance C, but this reduction is in turn compensated for by the corresponding advance of the push frame 3.
  • the safety distance C can be limited to the prescribed minimum with the hoist 7 standing vertically, since this no longer decreases even when the hoist 7 is inclined.
  • the coupling rod 19 is provided with a longitudinal adjustment device 21, so that the pivot axis 18 can thus be shifted to the right or left in the plane of the drawing.
  • the size of the path of the push frame 3 at an inclination of the lifting mechanism 7 results from the ratio of the two lever arms of the cross lever 15. This is 1: 1 in the example shown.
  • a coupling rod 19 has another advantage over a fixed pivot axis 18.
  • the pivot axis 18 can track the movement by means of the pivotable coupling rod 19.
  • the inventive use of the cross lever 15 also results in greater security in the event of a possible breakage of the piston rod 9 of the tilting member 9.10.
  • the lifting mechanism 7 is also held in such a case by the fixed pivot axis 18 and the thrust member 4, 5. This prevents the hoist from tipping back completely.
  • the transverse lever 15 can be designed to be longitudinally adjustable according to a further feature of the invention, not shown in the drawing.
  • This longitudinal adjustment is expediently provided in the lever arm of the transverse lever 15, which has the pivot connection 23 with the thrust member 4, 5. By extending this. Because the lever arm increases the feed, a shortening would be necessary for the other lever arm.
  • the lengthening and shortening of the cross lever 15 can be controlled by the hydraulics of the truck.

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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)

Abstract

1. Stacker with lifting unit (7) of double-arm construction, which is mounted at an inclination in a push frame (3), whereby a pushing member (4, 5) is disposed between the vehicle frame (1) and the push frame (3) and an inclined member (9, 10) disposed between the latter and the lower lever arm of the lifting unit (7) characterised in that the swivelling connection of the pushing member (4, 5) to the push frame (3) is effected via one end (23) of a double-arm, transverse lever (15) which is mounted so that it can be swivelled at the push frame (3), the other end of the transverse lever being secured to that it can be swivelled at the lower lever arm (16) of the lifting unit (7).

Description

Die Erfindung bezieht sich auf einen Schubstapler mit in einem Schubrahmen neigbar gelagertem, doppelarmig ausgebildeten Hubwerk. Bei den bekannten Ausführungsformen s. z. B. US-A 3259257 sind dabei ein Schubglied, insbesondere ein Hydraulikzylinder, zwischen dem Fahrzeugrahmen und dem Schubrahmen sowie ein ebenfalls als Hydraulikzylinder ausgebildetes Neigeglied zwischen letzterem und dem unteren Hebelarm des Hubwerkes angeordnet. Man ist bestrebt, die Länge des Staplers möglichst kurz zu halten, um eine geringe Arbeitsgangbreite im Lager zu erreichen. Die Arbeitsgangbreite wird dabei festgelegt durch die Länge des Fahrzeugaufbaus zuzüglich der Lastlänge und einem Sicherheitsabstand von 2 x 100 mm. Da die Mindestmaße des Fahrerplatzes festgelegt sind und auch der Batterieraum von den üblichen Batterieabmessungen vorbestimmt ist, kann die Länge lediglich noch durch einen schmaleren Aufbau des Hubwerkes verkürzt werden. Hier sind aber wegen der erforderlichen Tragfähigkeit bestimmte Grenzen gesetzt. Nachdem auch der Mindestsicherheitsabstand zwischen dem Hubwerk und dem Fahrzeugaufbau, welcher vor allem Verletzungen des Fahrers verhindern soll, festgelegt ist, sind damit nahezu alle Möglichkeiten einer Verkürzung ausgeschöpft. Nun muß aber bei den bekannten Staplern der Sicherheitsabstand bei senkrecht stehendem Hubwerk größer sein als unbedingt erforderlich, da er sich bei der Rückwärtsneigung des oberen Hebelarms des Hubwerkes verringert und in der Endneigestellung immer noch das vorgeschriebene Mindestmaß haben muß.The invention relates to a push truck with a double-arm lifting mechanism that is tiltably mounted in a push frame. In the known embodiments see. e.g. B. US-A 3259257 a thrust member, in particular a hydraulic cylinder, between the vehicle frame and the thrust frame and a tilting member also formed as a hydraulic cylinder are arranged between the latter and the lower lever arm of the lifting mechanism. The aim is to keep the length of the truck as short as possible in order to achieve a narrow aisle width in the warehouse. The width of the aisle is determined by the length of the vehicle body plus the load length and a safety distance of 2 x 100 mm. Since the minimum dimensions of the driver's seat are fixed and the battery space is also predetermined by the usual battery dimensions, the length can only be shortened by a narrower structure of the lifting mechanism. However, there are certain limits here due to the necessary load-bearing capacity. After the minimum safety distance between the hoist and the vehicle body, which is primarily intended to prevent injuries to the driver, has also been defined, almost all possibilities for shortening have been exhausted. Now, in the known trucks, the safety distance when the hoist is standing vertically must be greater than is absolutely necessary, since it decreases with the backward inclination of the upper lever arm of the hoist and must still have the prescribed minimum dimension in the final tilt position.

Hier setzt nun die vorliegende Erfindung ein, und es liegt die Aufgabe vor, eine Verringerung des Sicherheitsabstandes beim Neigen des Hubwerkes zu verhindern, so daß bereits bei senkrecht stehendem Hubwerk kein größeres Maß als der vorgeschriebene Mindestabstand eingehalten werden muß. Dies wird erfindungsgemäß dadurch erreicht, daß die Schwenkverbindung des Schubgliedes mit dem Schubrahmen über das eine Ende eines doppelarmigen, schwenkbar am Schubrahmen gelagerten Querhebels erfolgt, dessen anderes Ende schwenkbar am unteren Hebelarm des Hubwerkes befestigt ist. Wenn bei dieser Konstruktion bei feststehendem Schubglied eine Neigung des Hubwerkes erfolgt, dann nimmt das Hubwerk das mit ihm verbundene Ende des Querhebels mit und schwenkt diesen um seine Schubrahmenachse. Dabei drückt sich das andere Hebelarmende am feststehenden Schubglied ab und bewegt zwangsläufig den Schubrahmen in Ausfahrrichtung, so daß sich der Abstand zwischen dem Hubwerk und dem Fahrzeugrahmen vergrößert bzw. sein Mindestmaß einhält.This is where the present invention comes in, and the task is to prevent a reduction in the safety distance when the hoist is tilted, so that even with the hoist standing vertically, no greater dimension than the prescribed minimum distance must be observed. This is achieved according to the invention in that the pivotal connection of the thrust member to the push frame takes place via one end of a double-armed, pivotally mounted cross lever on the push frame, the other end of which is pivotally attached to the lower lever arm of the lifting mechanism. If, in this construction, with a fixed thrust member, the lifting mechanism is inclined, then the lifting mechanism takes the end of the transverse lever connected to it and pivots it about its push frame axis. The other end of the lever arm presses off on the fixed pushing element and inevitably moves the pushing frame in the extending direction, so that the distance between the lifting mechanism and the vehicle frame increases or its minimum size is maintained.

Ein weiterer Vorteil ist darin zu sehen, 'daß bei einem etwaigen Bruch der Kolbenstange des als Hydraulikzylinders ausgebildeten Neigegliedes durch die beiden Verbindungen des Querhebels mit dem Schubglied und dem Schubrahmen ein vollständiges Zurückkippen des Hubwerkes verhindert wird, so daß sich eine beachtliche Erhöhung des Sicherheitsfaktors ergibt.Another advantage can be seen in the fact that ' in the event of a possible breakage of the piston rod of the tilting element designed as a hydraulic cylinder, the two connections of the transverse lever to the pushing element and the pushing frame prevent the lifting mechanism from completely tilting back, so that there is a considerable increase in the safety factor .

Nach einem weiteren Merkmal der Erfindung erfolgt die Anlenkung des Querhebels am Hubwerk an der Verbindungsstelle zwischen Hubwerk und Neigeglied, so daß eine zusätzliche Schwenkachse eingespart wird. Nachdem sich die Schwenkachse des Querhebels innerhalb des Schubrahmens befindet, ist es zweckmäßig, diese Schwenkachse an einer mit dem Rahmen verbundenen Koppelstange anzuordnen. Diese ist vorzugsweise längsverstellbar, um die Lage der Schwenkachse, insbesondere zum Ausgleich von Fertigungstoleranzen, verschieben zu können.According to a further feature of the invention, the articulation of the cross lever on the lifting mechanism takes place at the connection point between the lifting mechanism and the tilt link, so that an additional pivot axis is saved. After the pivot axis of the cross lever is located within the push frame, it is expedient to arrange this pivot axis on a coupling rod connected to the frame. This is preferably longitudinally adjustable in order to be able to shift the position of the pivot axis, in particular to compensate for manufacturing tolerances.

Das Maß der Längsverstellung des Schubrahmens beim Neigen des Hubwerkes hängt von der Länge der beiden Hebelarme des Querhebels ab. Einen gleichbleibenden Sicherheitsabstand erhält man dann, wenn beide Hebelarme gleichlang gestaltet sind. Von Vorteil ist es auch, wenn man den Höhenabstand der Schwenkachse des Hubwerkes von der Verbindungsstelle mit dem Neigeglied gleichgroß gestaltet wie den Abstand von dieser Drehachse zur höchsten, am weitesten vorstehenden Kante des Fahrzeuges.The extent of the longitudinal adjustment of the push frame when tilting the lifting mechanism depends on the length of the two lever arms of the cross lever. A constant safety distance is obtained when both lever arms are of the same length. It is also advantageous if the height distance of the swivel axis of the lifting mechanism from the connection point with the tilting link is made the same size as the distance from this axis of rotation to the highest, most protruding edge of the vehicle.

Die Zeichnung zeigt ein Ausführungsbeispiel der Erfindung. Es stellen dar:

  • Fig. 1 die teilweise geschnittene Seitenansicht eines Schubstapiers,
  • Fig. 2 eine Draufsicht auf das Fahrgestell nach Fig. 1,
  • Fig. 3 einen Ausschnitt aus Fig. 2 mit geneigtem Hubwerk,
  • Fig. 4 einen Ausschnitt aus Fig. 1, ebenfalls mit geneigtem Hubwerk.
The drawing shows an embodiment of the invention. They represent:
  • 1 is a partially sectioned side view of a push stacker,
  • 2 is a plan view of the chassis of FIG. 1,
  • 3 shows a detail from FIG. 2 with an inclined lifting mechanism,
  • Fig. 4 shows a detail from Fig. 1, also with an inclined lifting mechanism.

Auf dem Fahrzeugrahmen 1 des Schubstapiers ist über Rollen 2 längsverschiebbar ein Schubrahmen 3 gelagert, dessen Bewegungen über den Kolben 4 eines als Hydraulikzylinder 5 ausgebildeten Schubgliedes erfolgen. Der Schubrahmen 3 ist an seinem vorderen freien Ende beidseits mit senkrecht angeordneten Stützen 6 versehen, an denen das Hubwerk 7 um die Achse 8 neigbar gelagert ist. Der Neigewinkel wird durch den Kolben 9 eines ebenfalls als Hydraulikzylinder 10 ausgebildeten Neigegliedes eingestellt. Am Hubwerk 7 ist heb- und senkbar die Lastaufnahmevorrichtung 11 angeordnet.On the vehicle frame 1 of the push stacker, a push frame 3 is mounted so as to be longitudinally displaceable via rollers 2, the movements of which are carried out via the piston 4 of a thrust member designed as a hydraulic cylinder 5. The push frame 3 is provided at its front free end on both sides with vertically arranged supports 6, on which the lifting mechanism 7 is mounted tiltable about the axis 8. The tilt angle is set by the piston 9 of a tilt member, which is also designed as a hydraulic cylinder 10. The load suspension device 11 is arranged on the lifting mechanism 7 so that it can be raised and lowered.

Der Fahrzeugaufbau besteht aus dem nur schematisch angedeuteten Fahrerplatz 12 sowie dem davorliegenden Batterieraum 13. Die Länge L2 des Fahrzeugaufbaus bestimmt sich aus der Länge A des Fahrerplatzes 12, der Länge B des Batterieraumes 13 sowie der Breite D des Hubwerkes 7 und dem Sicherheitsabstand C, der zwischen dem Hubwerk 7 und dem Batterieraum 13 einzuhalten ist. Da die Länge der Lastaufnahmevorrichtung 11, und damit auch des Fahrzeugrahmens 1, durch die Größe der aufzunehmenden Last bestimmt und daher nicht veränderbar ist, muß zur Erzielung einer geringen Gangbreite im Lager die Länge L2 möglichst kurz gehalten werden. Der Sicherheitsabstand C zwischen dem Hubwerk 7 und dem Batterieraum 13 verändert sich bei den bekannten Ausführungsformen beim Neigen des Hubwerkes 7 zum Fahrzeugaufbau hin. Er muß daher so groß gehalten werden, daß auch bei geneigtem Hubwerk 7 das vorgeschriebene Maß eingehalten wird. Infolgedessen wird er üblicherweise bei senkrecht stehendem Hubwerk 7 größer als notwendig sein.The vehicle body consists of the driver's seat 12, which is only indicated schematically, and the battery compartment 13 in front of it. The length L 2 of the vehicle body is determined from the length A of the driver's seat 12, the length B of the battery compartment 13 and the width D of the lifting mechanism 7 and the safety distance C, between the hoist 7 and the battery compartment 13. Since the length of the load suspension device 11, and thus also of the vehicle frame 1, is determined by the size of the load to be picked up and is therefore not changeable, a narrow aisle width must be achieved in Bear the length L 2 as short as possible. The safety distance C between the lifting mechanism 7 and the battery space 13 changes in the known embodiments when the lifting mechanism 7 is inclined towards the vehicle body. It must therefore be kept so large that the prescribed dimension is maintained even with an inclined lifting mechanism 7. As a result, it will usually be larger than necessary when the hoist 7 is vertical.

Das Schubglied 4, 5 ist einerseits über einen Lagerbock 14 mit dem Fahrzeugrahmen 1 und andererseits über einen doppelarmigen Querhebei 15 mit dem Hubwerk 7, und zwar über einen Lagerbock 16 jeweils gelenkig verbunden. Am Lagerbock 16 ist außerdem der Kolben des Neigegliedes 9, 10 angelenkt, dessen Zylinder 10 über einen Lagerbock 17 mit dem Schubrahmen 3 verbunden ist. Der Querhebel 15 ist um die Achse 18 schwenkbar gelagert, welche ihrerseits über die Koppelstange 19 und den Lagerbock 20 mit dem Schubrahmen 3 verbunden ist.The thrust member 4, 5 is connected on the one hand via a bearing block 14 to the vehicle frame 1 and on the other hand via a double-armed transverse lifting device 15 to the lifting mechanism 7, specifically via a bearing block 16. On the bearing block 16, the piston of the tilt member 9, 10 is also articulated, the cylinder 10 of which is connected to the push frame 3 via a bearing block 17. The cross lever 15 is pivotally mounted about the axis 18, which in turn is connected to the push frame 3 via the coupling rod 19 and the bearing block 20.

Sofern das Neigeglied 9, 10 unabhängig vom eingestellten Neigewinkel des Hubwerkes 7 feststeht und der Kolben 4 des Schubgliedes 4, 5 verschoben wird, dann bewegt sich der Schubrahmen 3 in der Zeichnungsebene nach rechts bzw. links. Wird nun umgekehrt bei feststehendem Schubglied 4, 5 der Neigewinkel des Hubwerkes 7 gegenüber der senkrechten Lage nach Fig. 1 verändert, dann bewegt sich der Lagerbock 16 zusammen mit dem Kolben 9, wie Fig. 3 zeigt, in der Zeichnungsebene nach rechts, so daß der Querhebel 15 entgegen dem Uhrzeigersinn um die Verbindungsachse 23 am Schubglied 4, 5 geschwenkt wird. Da das Schubglied 4, 5 feststeht, wird über die Koppelstange 19 der Schubrahmen 3 in der Zeichnungsebene nach rechts mitbewegt. Durch die Neigung des Hubwerkes 7 würde an sich der Sicherheitsabstand C verringert, jedoch wird diese Verringerung durch den entsprechenden Vorschub des Schubrahmens 3 wiederum ausgeglichen. Man kann infolgedessen den Sicherheitsabstand C bei senkrecht stehendem Hubwerk 7 auf das vorgeschriebene Mindestmaß beschränken, da dieser sich auch bei Neigung des Hubwerkes 7 nicht mehr verringert.If the tilting member 9, 10 is fixed independently of the set tilting angle of the lifting mechanism 7 and the piston 4 of the pushing member 4, 5 is shifted, then the pushing frame 3 moves to the right or left in the plane of the drawing. Conversely, if the push element 4, 5 is fixed, the tilt angle of the lifting mechanism 7 is changed relative to the vertical position according to FIG. 1, then the bearing block 16 moves together with the piston 9, as shown in FIG. 3, in the drawing plane to the right, so that the cross lever 15 is pivoted counterclockwise around the connecting axis 23 on the thrust member 4, 5. Since the push element 4, 5 is fixed, the push frame 3 is moved to the right in the plane of the drawing via the coupling rod 19. The inclination of the lifting mechanism 7 would in itself reduce the safety distance C, but this reduction is in turn compensated for by the corresponding advance of the push frame 3. As a result, the safety distance C can be limited to the prescribed minimum with the hoist 7 standing vertically, since this no longer decreases even when the hoist 7 is inclined.

Vor allem um Fertigungstoleranzen auszugleichen, ist die Koppelstange 19 mit einer Längsverstellvorrichtung 21 versehen, so daß man also die Schwenkachse 18 in der Zeichnungsebene nach rechts oder links verschieben kann. Die Größe des Weges des Schubrahmens 3 bei einer Neigung des Hubwerkes 7 ergibt sich aus dem Verhältnis der beiden Hebelarme des Querhebels 15. Dieses beträgt im gezeichneten Beispiel 1 :1. Nachdem weiterhin die Höhenabstände zwischen dem Lagerbock 16 und der Schwenkachse 8 des Hubwerkes 7 so wie zwischen dieser Achse und der höchsten, am weitesten nach vorn stehenden Kante 22 des Fahrzeugaufbaues 12, 13 gleich gehalten sind, bleibt der Abstand C, unabhängig von der Neigung des Hubwerkes 7, immer-derselbe. Man könnte ihn allerdings durch Änderung der entsprechenden Hebelarme auch vergrößern.Above all to compensate for manufacturing tolerances, the coupling rod 19 is provided with a longitudinal adjustment device 21, so that the pivot axis 18 can thus be shifted to the right or left in the plane of the drawing. The size of the path of the push frame 3 at an inclination of the lifting mechanism 7 results from the ratio of the two lever arms of the cross lever 15. This is 1: 1 in the example shown. After the height distances between the bearing block 16 and the pivot axis 8 of the lifting mechanism 7 as well as between this axis and the highest, most forward edge 22 of the vehicle body 12, 13 are kept the same, the distance C remains independent of the inclination of the Hoist 7, always the same. However, it could also be enlarged by changing the corresponding lever arms.

Die Verwendung einer Koppelstange 19 hat gegenüber einer festliegenden Schwenkachse 18 noch einen weiteren Vorteil. Bei Staplern mit querverschiebbarem Hubwerk 7 kann die Schwenkachse 18 durch die schwenkbare Koppelstange 19 die Bewegung nachvollziehen.The use of a coupling rod 19 has another advantage over a fixed pivot axis 18. In forklifts with a transversely displaceable lifting mechanism 7, the pivot axis 18 can track the movement by means of the pivotable coupling rod 19.

Durch die erfindungsgemäße Verwendung des Querhebels 15 ergibt sich auch noch eine größere Sicherheit bei einem etwaigen Bruch der Kolbenstange 9 des Neigegiiedes 9.10. Durch diefestliegende Schwenkachse 18 und das Schubglied 4, 5 wird das Hubwerk 7 auch in einem solchen Fall gehalten. Ein vollständiges Zurückkippen des Hubwerkes wird damit also verhindert.The inventive use of the cross lever 15 also results in greater security in the event of a possible breakage of the piston rod 9 of the tilting member 9.10. The lifting mechanism 7 is also held in such a case by the fixed pivot axis 18 and the thrust member 4, 5. This prevents the hoist from tipping back completely.

Um bei einer Neigung des Hubwerkes 7 den Vorschub des Schubrahmens 3 noch zu vergrößern, kann nach einem weiteren, in der Zeichnung nicht dargestellten Merkmal der Erfindung der Querhebel 15 längsverstellbar gestaltet sein. Zweckmäßig wird diese Längsverstellung in dem Hebelarm des Querhebels 15 vorgesehen, welcher die Schwenkverbindung 23 mit dem Schubglied 4, 5 aufweist. Durch eine Verlängerung dieses . Hebelarmes wird nämlich der Vorschub vergrößert, während beim anderen Hebelarm hierfür eine Verkürzung erforderlich wäre. Die Verlängerung und Verkürzung des Querhebels 15 kann dabei durch die Hydraulik des Staplers gesteuert werden.In order to further increase the feed of the push frame 3 when the lifting mechanism 7 is inclined, the transverse lever 15 can be designed to be longitudinally adjustable according to a further feature of the invention, not shown in the drawing. This longitudinal adjustment is expediently provided in the lever arm of the transverse lever 15, which has the pivot connection 23 with the thrust member 4, 5. By extending this. Because the lever arm increases the feed, a shortening would be necessary for the other lever arm. The lengthening and shortening of the cross lever 15 can be controlled by the hydraulics of the truck.

Claims (7)

1. Stacker with lifting unit (7) of double-arm construction, which is mounted at an inclination in a push frame (3), whereby a pushing member (4, 5) is disposed between the vehicle frame (1) and the push-frame (3) and an inclined member (9, 10) disposed between the latter and the lower lever arm of the lifting unit (7) characterised in that the swivelling connection of the pushing member (4, 5) to the push frame (3) is effected via one end (23) of a double-arm, transverse lever (15) which is mounted so that it can be swivelled at the push frame (3), the other end of the transverse lever being secured so that it can be swivelled at the lower lever arm (16) of the lifting unit (7).
2. Stacker according to claim 1, characterised in that the articulated connection of the transverse lever (15) at the lifting unit (7) is effected at the connection point (16) between the lifting unit' (7) and the inclined member (9, 10).
3. Stacker according to one or both of the preceding claims 1 to 2, characterised in that the swivel shaft (18) of the transverse lever (15) is connected to the push frame (2) through a coupling bar (19).
4. Stacker according to claim 3, characterised in that the coupling bar (19) can be adjusted in itself longitudinally (21).
5. Stacker according to at least one or several of the preceding claims, characterised in that the articulated connection (18) between the transverse lever (15) and the push frame (3, 19) is located approximately in the centre between the articulated points (23, 16) with the pushing member (4, 5) and the inclined member (9, 10).
6. Stacker according to one or several of the preceding claims 1 to 4, characterised in that the transverse lever (15), particularly its lever arm provided with the swivelling connection (23) to the pushing member (4, 5) is adjustable in itself longitudinally.
7. Stacker according to at least one or several of the preceding claims, characterised in that the vertical distance (1,) between the articulated point (16) of the inclined member (9, 10) at the lifting unit (7) and its axis of inclination (8) is approximately the same as the distance (1,) from this axis (8) to the furthest protruding upper edge (22) of the vehicle.
EP86103979A 1985-04-16 1986-03-22 Loader with a horizontally movable mast assembly Expired EP0199116B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86103979T ATE34555T1 (en) 1985-04-16 1986-03-22 PUSH FORKLIFT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853513547 DE3513547A1 (en) 1985-04-16 1985-04-16 Reach truck
DE3513547 1985-04-16

Publications (2)

Publication Number Publication Date
EP0199116A1 EP0199116A1 (en) 1986-10-29
EP0199116B1 true EP0199116B1 (en) 1988-05-25

Family

ID=6268125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103979A Expired EP0199116B1 (en) 1985-04-16 1986-03-22 Loader with a horizontally movable mast assembly

Country Status (3)

Country Link
EP (1) EP0199116B1 (en)
AT (1) ATE34555T1 (en)
DE (1) DE3513547A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2857344B1 (en) 2013-10-07 2016-04-06 Hyster-Yale Group, Inc. Reach truck
CN112919373A (en) * 2021-03-15 2021-06-08 山东省科学院自动化研究所 Logistics carrier and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1280910A (en) * 1961-01-26 1962-01-08 Lansing Bagnall Ltd Improvements to industrial trolleys
US3151755A (en) * 1961-05-31 1964-10-06 Yale & Towne Inc Scissor lever with a pivotal link for shifting and tilting the mast on an industriallift truck
US3259257A (en) * 1964-06-12 1966-07-05 Baldwin Lima Hamilton Corp Multiple-purpose fork lift truck
GB1218553A (en) * 1967-08-04 1971-01-06 Matbro Ltd Improvements in fork lift trucks
GB1429478A (en) * 1972-10-03 1976-03-24 Ransomes Sims & Jefferies Ltd Reach trucks
GB2092551A (en) * 1981-02-07 1982-08-18 Coventry Climax Ltd Sideloading industrial truck

Also Published As

Publication number Publication date
DE3513547C2 (en) 1989-06-01
ATE34555T1 (en) 1988-06-15
DE3513547A1 (en) 1986-10-16
EP0199116A1 (en) 1986-10-29

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