EP0385242B1 - Accessoire frontal pour chariot élévateur avec deux bras preneurs - Google Patents

Accessoire frontal pour chariot élévateur avec deux bras preneurs Download PDF

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Publication number
EP0385242B1
EP0385242B1 EP19900103296 EP90103296A EP0385242B1 EP 0385242 B1 EP0385242 B1 EP 0385242B1 EP 19900103296 EP19900103296 EP 19900103296 EP 90103296 A EP90103296 A EP 90103296A EP 0385242 B1 EP0385242 B1 EP 0385242B1
Authority
EP
European Patent Office
Prior art keywords
load
swivel
component
axis
bearing part
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 - Lifetime
Application number
EP19900103296
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German (de)
English (en)
Other versions
EP0385242A2 (fr
EP0385242A3 (en
Inventor
Otmar Kaup
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.)
Kaup & Co KG Gesellschaft fur Maschinenbau GmbH
Kaup GmbH and Co KG
Original Assignee
Kaup & Co KG Gesellschaft fur Maschinenbau GmbH
Kaup GmbH and Co KG
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 Kaup & Co KG Gesellschaft fur Maschinenbau GmbH, Kaup GmbH and Co KG filed Critical Kaup & Co KG Gesellschaft fur Maschinenbau GmbH
Publication of EP0385242A2 publication Critical patent/EP0385242A2/fr
Publication of EP0385242A3 publication Critical patent/EP0385242A3/de
Application granted granted Critical
Publication of EP0385242B1 publication Critical patent/EP0385242B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members
    • B66F9/18—Load gripping or retaining means
    • B66F9/184—Roll clamps

Definitions

  • the invention relates to a front-mounted device for a loader according to the preamble of patent claim 1.
  • front-end devices are used to hold cylindrical bodies which lie on the roadway level in such a way that the axis of the cylindrical body is perpendicular ("transverse") to the longitudinal center plane of the loader.
  • the pivot axis about which the supporting part can be rotated relative to the component attached to the lifting slide, is arranged inclined at an angle of approximately 4 or 5 degrees to the front downward. Then, when picking up, the upper gripper arm reaches forward far enough so that the center of gravity of the cylindrical body lies close to the line of action of force that passes through the center of gravity of the two gripper plates.
  • this inclination of the pivot axis has the disadvantage that when the cylindrical body is pivoted by 90 degrees, its axis is inclined from the top front to the bottom rear relative to the mast.
  • the cylindrical body is to be placed on a stack of other cylindrical bodies, for example rollers, stacked one on top of the other, the front lower edge of the cylindrical body is lower than the rear edge.
  • This inclination of the axis of the cylindrical body if it is to be placed on a horizontal surface, also has the further disadvantage that this horizontal plane on which it is to be placed must not be arranged as high as that with possible full utilization of the Lifting height of the forklift would be possible. This disadvantage cannot be sufficiently compensated for by tilting the mast backwards.
  • front-end implements of another type namely so-called roller tilting clamps
  • the component on which the two gripper arms are pivotally mounted can be tilted by 90 degrees about an axis arranged in the lower region of the front-end implement and parallel to the mast level that a cylindrical body lying on the road with a horizontal axis, the axis of the cylindrical body lying in the longitudinal center plane of the loader, can be accommodated and by tilting the component to which the gripping arms are articulated about said axis into position can be pivoted in which the axis of the cylindrical body is vertical.
  • roller tilting clamp C 4U or C 7U Two configurations are known for the basic arrangement of the roller tilting clamp relative to the lifting frame, namely either in such a way that the suspension is inclined forward by 4 degrees, resulting in a small stem dimension, or in such a way that the axis of the pivoted-up cylindrical body is exactly vertical , whereby this embodiment requires a larger front dimension.
  • An additional swiveling about an axis lying parallel to the road plane in the longitudinal center plane of the loader is neither necessary nor known in such roller tilt clamps (prospectus sheet of the applicant: "roller tilt clamp C 4U or C 7U").
  • the tilting axis must be located at the bottom so that the gripper arms pivot forward to be picked up. If the diameter of the cylindrical body is smaller than its length, the center of gravity lies far forward when picking up from the road.
  • a front-mounted device for a lift truck with a mast and a movable on this lifting carriage is known, on which a component is arranged on a support plate, on which in turn a mounting plate is arranged, one by one in the direction of travel pointing axis has rotatable support member, which axis together with the mounting plate is pivotable relative to said component by a pressure medium cylinder.
  • power-operated grabs for bales can also be attached to the supporting part.
  • a link between the gripper drives and the pressure medium cylinder for pivoting the mounting plate is not disclosed.
  • the invention is therefore based on the object of specifying a front-mounted device of the type described at the outset with which it is possible, despite the inclinability of the pivoting axis of rotation by pivoting the mounting plate with the supporting part, the cylindrical body is inevitably to be set down or raised with the axis at least largely perpendicular.
  • the front part of a lift truck is designated, which has front wheels 2 and a mast 3, on which a lifting carriage with a support plate 4 can be moved.
  • On the support plate 4 is a component 5 of the front-end device suspended on which a slewing ring 6 is attached, on which a support member 7 is pivotally mounted, on which two gripper arms 8 and 10 are pivotally mounted, a gripping plate 9 being pivotally mounted on the gripping arm 8 and a gripping plate on the gripping arm 10 11 is pivotally mounted.
  • the line of action 14, along which the pressing forces of the two gripping arms 8 and 10 are transmitted, is clearly recognizable behind the center of gravity 13 of the cylindrical body 12 to be received.
  • the gripping plate 9 cannot go any further below this drive.
  • the front loader part 1, the front wheel 2 and the mast 3 and the support plate 4 of the lifting carriage according to FIG. 2 are the same parts as the parts provided with the same reference numbers in FIG. 1.
  • the parts provided with the reference numbers 6 to 12 essentially correspond to the parts with the same reference numbers according to FIG. 1.
  • a component 15 is attached to the support plate 4 and the slewing ring 6 is mounted on a component 16, this component 16 being pivotable and tiltable about a pivot axis 18 relative to the component 15, this pivoting and tilting movement being effected by the cylinder piston units 17 - 23, 24 can be effected.
  • the component 15 can be attached to the support plate which is no longer shown in FIG. 3 by means of the claws 20 and 21.
  • the component 16 is connected to a mounting plate 22, on which the slewing ring 6 is mounted, in which the supporting part 7 is pivotably mounted about the axis 33. This pivoting movement about the axis 33 is effected by a drive motor 34.
  • the cylinder 17 is fastened, in which a piston 23 is displaceable, the piston rod 24 of which is connected to the claw 21 or the component 15 via a bearing pin 25.
  • the gripping arm 8 is connected in a manner not recognizable in FIG. 3 to the piston rod of a cylinder-piston unit, the cylinder 26 of which is mounted on the supporting part 7 by means of a bearing bolt 27.
  • the gripper arm 8 is pivotable about the bearing pin 28.
  • the gripper arm 10 is also connected to the piston rod of a cylinder-piston unit, the cylinder 29 of which is mounted in the support part 7 by means of a bearing pin 31, the gripper arm 10 being mounted in the support part 7 by means of a pin 30.
  • the drive motor 34 which is provided for pivoting by means of the rotating ring 6 on the component 22 and is rotatably pivotable about the axis 33, is arranged in the upper region of the component 22.
  • This drive motor 34 has a certain extent in the direction of the longitudinal center plane of the loader. Since to pivot the component 22 about the axis 18 counterclockwise in the region of the pivot axis 18, a distance between the components 22 and 15 is required so that the lower region of the component 22 can pivot towards the lower region of the component 15 when tilted, this will optimally used by the space required by arranging the drive motor 34 in this upper region without increasing the overall required front dimension only for the purpose of accommodating the drive motor 34.
  • FIG. 4 shows the same components as in FIG. 3, but this time in the position in which the pressure chamber is of the cylinder 17 is pressurized with the result that the piston 23 is extended with the piston rod 24. This has the consequence that the mounting plate 22 is parallel to the trailer component 15 and thus the pivot axis 33 is parallel to the roadway level of the loader 1.
  • a safety shut-off valve 41 and the plug-in connection 42 and, via the safety shut-off valve 43, the line 44 within the front-mounted device are connected to the line 40 arranged in the front part 1 of the lift loader, a safety pressure relief valve 45 being connected between the two lines 39 and 44.
  • the line 39 branches into the two lines 47 and 48, wherein in each of these two lines 47 and 48 there is a non-return valve 49 which can be opened from the line 44 and the line 47 to the piston-side pressure chamber of the cylinder 29 and the line 48 to the piston-side Pressure chamber of the cylinder 26 leads.
  • the line 44 leads to the pressure chamber of the cylinder 29 on the piston rod side.
  • a line 50 branches off from the line 44 and leads to the pressure chamber of the cylinder 26 on the piston rod side, in which line 50 a shut-off valve 51 which can be actuated as a function of the pivoting rotational position of the support part 7 is arranged to be able to relieve the pressure only on the cylinder 29, if necessary, while the piston-side pressure chamber of the cylinder 26 remains closed.
  • circuit according to FIG. 5 corresponds to the known prior art.
  • a branch line 52 is connected to line 39, which leads to the piston-side pressure chambers of the two cylinders 17 connected in parallel and arranged in parallel to one another.
  • a two-position / two-way valve 53 which can be actuated mechanically by means of the actuation 54 is arranged in this branch line 52.
  • the mode of action is as follows: With the line 44 under pressure and the line 39 under no pressure, the truck moves as far as possible to the cylindrical body 12, so that the gripping plate 9 is moved as far as possible under the cylindrical body 12. As a result of the dead weight of the supporting part 7 with the gripping arms 8 and 10, these parts pivot into the position shown in FIG. 2 and FIG. 3.
  • the gripper arm 10 can open or close by means of the cylinder 29, while the cylinder 26 of the gripper arm 8 is not actuated, since the valve 51 is closed in this pivoting position of the support part 7.
  • the line 44 is now arbitrarily relieved of pressure and the line 39 is pressurized, with the piston in the cylinder 29 initially extending so that the cylindrical body 12 is gripped. If the pressure has risen sufficiently, the pistons 23 in the cylinders 17 are also extended so that the component 16 with the fastening plate 22 and thus the rotating ring 6 and the support part 7 with the gripping arms 8 and 10 pivot into the position shown in FIG. 4, ie in the position in which the pivot axis 33 of the support member 7 is parallel to the plane of the road.
  • the lifting carriage is now first raised and then the rotary swivel drive 34 is pressurized, so that the support part 7 with the gripping arms 8 and 10 swivels by 90 degrees, so that the axis of the cylindrical body 12 is perpendicular to the plane of the road.
  • the valve 53 is moved into the closed position by means of the switching cam 55, so that the position shown in FIG. 4 is maintained even when the gripper arm cylinder 29 is relieved of pressure or the gripper arm cylinders 29 and 26 are relieved of pressure.
  • the cylindrical body 12 can thus be set down exactly.
  • the cylinders 17 are only relieved of pressure when the supporting part 7 pivots about the pivot axis 33, so that the switching cam 55 actuates the actuating part 54 of the valve 53 and the line 39 is relieved of pressure.
  • Figure 6 shows the switch cam pressed and in this position the valve 53 is in the open position.
  • the support part 7 must first be rotated into the position in which the gripper arm axes of the gripper arms 8 and 10 lie parallel to the plane of the roadway. In this position, the pressure chambers on the piston rod side of the cylinders 26 and 29 of the gripping arms 8 and 10 are moved apart completely by pressure and then the support member 7 is pivoted while maintaining the pressure so that the valve 53 is closed.

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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)
  • Load-Engaging Elements For Cranes (AREA)

Claims (4)

  1. Accessoire frontal pour chariot élévateur pour manipuler des pièces au moins approximativement cylindriques, par exemple des rouleaux (12) de pièces qui s'étendent en surface, sont minces par rapport à leur largeur et présentent des bords parallèles, comme du papier, une bande d'acier ou analogue, accessoire dans le cas duquel le chariot élévateur est équipé d'un traineau de levage qui peut se déplacer sur un mât de levage (3), avec une plaque support (4) qui lui est accrochée et dans le cas duquel l'accessoire frontal présente un composant qui est prévu pour être accolé contre la plaque support (4) et sur lequel est portée, avec liberté de pivotement autour d'un axe (33) au moins approximativement horizontal et au moyen d'un mécanisme d'entrainement (34), une pièce support (7), étant précisé que sur cette pièce support (7) sont portés, avec liberté de pivotement autour d'axes (28, 30) parallèles l'un à l'autre et au moyen d'un autre mécanisme d'entrainement (26, 29), deux bras preneurs (8, 10) manoeuvrables par, chacun, un vérin (26, 29) et qu'en outre:
    a) un composant intermédiaire (16, 22), auquel sont reliés les bras preneurs (8 et 10), peut pivoter, par rapport au composant (15, 20, 21) qui peut s'accrocher à la plaque support du traineau de levage, autour d'un axe (18) au moins approximativement parallèle au plan de la piste et perpendiculaire au plan médian longitudinal du chariot élévateur, d'un angle de pivotement limité au moyen d'un dispositif de limitation de l'angle de pivotement en inclinaison, étant précisé que, dans la première position de limitation de pivotement du composant intermédiaire (16, 22) dans l'une des positions de rotation d'exploitation possible de la pièce support (7), les axes (28, 30) des bras preneurs (8 et 10) sont perpendiculaires au plan de la piste,
    b) le composant sur lequel la pièce support (7) est portée avec liberté de rotation est le composant intermédiaire (16, 22),
    c) l'angle de pivotement dont le composant intermédiaire (16, 22) peut pivoter autour de l'axe (18) par rapport au composant (15) est limité de façon telle que, dans la seconde position limite, lors de la prise d'une pièce cylindrique (12) reposant sur le plan de la piste, la ligne de liaison (14) entre les points de pression des deux plaques supports (9, 11) portées chacune sur un bras preneur (8, 10) passe tout près de l'axe (13) de la pièce cylindrique (12),
       accessoire caractérisé
    d) par le fait que sur la conduite (39) raccordée aux chambres de pression des vérins (26 et 29) mises sous pression pour la fermeture des bras preneurs (8 et 10) est raccordée une conduite de dérivation (52) qui conduit aux vérins (17, 23, 24) du mécanisme de pivotement en inclinaison,
    e) par le fait que dans la conduite de dérivation (52) est disposé un robinet à deux voies (53) et
    f) par le fait que le robinet à deux voies (53) peut être manoeuvré, par une came (55), en fonction de la position de pivotement, autour de l'axe (33) de la pièce support (7) par rapport à la plaque support (4), de façon telle que, lorsque les axes (28, 30) des bras preneurs sont en position verticale, le robinet à deux voies est commandé en position de fermeture.
  2. Accessoire frontal selon la revendication 1, caractérisé par le fait que, lorsque la chambre de pression du vérin (17, 23, 24) du mécanisme de pivotement en inclinaison n'est pas sous pression, l'axe de pivotement (33) de la pièce support (7) est orienté vers l'avant et vers le bas, étant précisé que le vérin (17, 23, 24) du mécanisme de pivotement en inclinaison est disposé, dans la zone inférieure du composant intermédiaire (16, 22) et d'autre part du composant (15), de façon telle que lorsque la chambre de pression de ce vérin (17, 23, 24) est sous pression, l'axe de pivotement de la pièce support (7) est au moins approximativement parallèle au plan de la piste, et par le fait que la came (55) est disposée de façon telle que, lors de la rotation de la pièce support (7) dans la position dans laquelle les axes (28, 30) de pivotement des bras preneurs sont parallèles au plan de la piste, la vanne (53) située sur la conduite en dérivation (52) est commandée en position ouverte et que, lors de la rotation de la pièce support (7) dans la position dans laquelle les axes (28, 30) des bras preneurs sont perpendiculaires au plan de la piste, la vanne (53) située sur la conduite en dérivation (52) est commandée en position de fermeture.
  3. Accessoire frontal selon la revendication 1, caractérisé par le fait que le dispositif de limitation de l'angle de pivotement en inclinaison limite l'angle de pivotement d'inclinaison à un angle valant entre 3,5 degrés et 5,5 degrés.
  4. Accessoire frontal selon la revendication 1, caractérisé par le fait que, dans le cas d'un chariot élévateur à mât de levage (3) inclinable, l'angle de pivotement dont peut s'incliner le composant intermédiaire (16, 22), sur laquelle la pièce support (7) est portée avec liberté de rotation, par rapport au composant (15, 20, 21) qui peut s'accrocher à la plaque support (4), est approximativement aussi grand que l'angle dont le mât de levage (3) peut s'incliner vers l'arrière par rapport à la verticale.
EP19900103296 1989-02-25 1990-02-21 Accessoire frontal pour chariot élévateur avec deux bras preneurs Expired - Lifetime EP0385242B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3905994 1989-02-25
DE19893905994 DE3905994C2 (de) 1989-02-25 1989-02-25 Vorbaugerät mit zwei Greifarmen zum Aufnehmen zylindrischer Körper in horizontaler oder vertikaler Lage mit hydraulischem Antrieb und mit einer Schaltung zur Steuerung derselben

Publications (3)

Publication Number Publication Date
EP0385242A2 EP0385242A2 (fr) 1990-09-05
EP0385242A3 EP0385242A3 (en) 1990-12-27
EP0385242B1 true EP0385242B1 (fr) 1993-12-22

Family

ID=6374988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900103296 Expired - Lifetime EP0385242B1 (fr) 1989-02-25 1990-02-21 Accessoire frontal pour chariot élévateur avec deux bras preneurs

Country Status (3)

Country Link
EP (1) EP0385242B1 (fr)
DE (1) DE3905994C2 (fr)
ES (1) ES2047726T3 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD26254A (fr) *
US2596477A (en) * 1949-01-21 1952-05-13 Towmotor Corp Lift truck grab arm mechanism for cylindrical bodies
DE903555C (de) * 1951-01-25 1954-02-08 Hans Still A G Greiforgan fuer Stapelgeraete
DE1076562B (de) * 1956-09-25 1960-02-25 Yale & Towne Mfg Co Stapler mit verstellbarer und drehbarer Klammer fuer zylindrische Lasten
DE1822477U (de) * 1958-03-22 1960-11-24 Erwin Baas Front- oder hecklader an schleppern od. dgl.
US3449009A (en) * 1967-06-09 1969-06-10 Cascade Corp Clamping mechanism
DE2142650A1 (de) * 1971-08-25 1973-03-15 Bygg Och Transportekonomie Ab Hubfahrzeug
US4127205A (en) * 1977-09-19 1978-11-28 Cascade Corporation Lift truck load clamp for handling paper rolls
DE8032810U1 (de) * 1980-12-10 1981-04-02 Eaton Ltd., Hounslow, Middlesex Zwischen zwei im wesentlichen senkrechten fuehrungssaeulen eines gabelstaplers hoehenverschieblich gelagerter hubschlitten
US4435119A (en) * 1981-11-16 1984-03-06 Cascade Corporation Lift truck load clamp having power-actuated pivotal subframe for handling paper rolls
US4435117A (en) * 1982-02-01 1984-03-06 Cascade Corporation Lift truck paper roll clamp having automatically adjustable roll of different diameters
US4516905A (en) * 1982-11-17 1985-05-14 Hoover Universal, Inc. Roll clamp

Also Published As

Publication number Publication date
EP0385242A2 (fr) 1990-09-05
ES2047726T3 (es) 1994-03-01
EP0385242A3 (en) 1990-12-27
DE3905994C2 (de) 1994-09-29
DE3905994A1 (de) 1990-09-06

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