EP0385242A2 - 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
EP0385242A2
EP0385242A2 EP90103296A EP90103296A EP0385242A2 EP 0385242 A2 EP0385242 A2 EP 0385242A2 EP 90103296 A EP90103296 A EP 90103296A EP 90103296 A EP90103296 A EP 90103296A EP 0385242 A2 EP0385242 A2 EP 0385242A2
Authority
EP
European Patent Office
Prior art keywords
component
axis
cylinder
drive
tilt
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.)
Granted
Application number
EP90103296A
Other languages
German (de)
English (en)
Other versions
EP0385242A3 (en
EP0385242B1 (fr
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 to handle,. H. Gripping, lifting, swiveling and depositing of at least approximately cylindrical bodies, preferably rolls of paper, steel tape or the like, provided front-mounted device ("roller clamp") for lift trucks with a lifting carriage that can be moved on a lifting frame and with a support plate on the latter, the front-mounted device being one has provided for attachment to the support plate component with which a support member is pivotally connected by means of a drive about an at least approximately horizontal axis, wherein two gripping arms are pivotally mounted on this support part by means of a drive about mutually parallel axes.
  • These 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. For example, if the cylindrical body is stacked on top of another stack of other cylindrical bodies, e.g. B.
  • front-end devices of another type namely so-called roller tilting clamps
  • the component on which the two gripper arms are directly pivotally mounted is one to the mast level and to the operator parallel to the track plane, arranged in the lower region of the front-mounted implement, can be tilted by 90 degrees so 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 picked up and tilted of the component on which the gripping arms are articulated, can be pivoted about the said axis into the position in which the axis of the cylindrical body is vertical.
  • roller tilting clamp 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 brackets (brochure sheet "roller tilt bracket 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.
  • the invention has for its object to eliminate the disadvantages described and to provide a front-mounted device that makes it possible to both securely accommodate cylindrical bodies lying transversely in front of the lift truck on the roadway, and also enables the cylindrical body with the vertical axis to be securely received deliberately discontinue.
  • the intermediate component, on which the support part is pivotally mounted that is to say can be rotated arbitrarily about a pivot axis
  • the component can be pivoted about an at least approximately horizontal, ie at least approximately parallel to the plane of the roadway, perpendicular to a plane in which the pivot axis about which the supporting part can be pivoted can be pivoted by a limited angle, this pivoting angle being limited by a pivoting angle limiting device.
  • the support member with the gripper arm axes can be brought into a position which corresponds to the position which is given in the previously known front-mounted devices with a rigidly inclined pivot axis of the support part, but on the other hand also take the position when being removed can, in which the pivot axis, about which the support member is rotatable, is perpendicular to the support plate of the lifting carriage, so that the cylindrical body can be safely set down.
  • a drive it is not absolutely necessary for a drive to be present for the pivoting about the axis in the limited pivoting angle. It only has to be possible, for example by rubbing the lower gripper arm on the carriageway and moving the lift truck, to move the front-mounted implement into each of the two possible pivot positions and to fix it in this by means of a locking device or locking device, for example a ratchet on a push rod, this locking device or Locking device must be arbitrarily releasable.
  • the pivot axis, about which the support part can be pivoted relative to the intermediate component is inclined forward downward, so that the support part assumes this position under the effect of the dead weight of the support part and the gripping arms without any arbitrary force.
  • This arrangement of the pivot axis enables a particularly favorable design to utilize the available installation space if the swivel-rotary drive, by means of which the rotation of the supporting part on which the gripping arms are mounted, is brought about relative to the component which is connected to the lifting slide , is arranged in the upper area of the intermediate component, on which the supporting part is pivotally pivoted, and is thus arranged in the vicinity of the tilting pivot axis, because a certain space is required for this rotary drive, which therefore makes it necessary to tilt the tilting axis. Shift the swivel axis to the front.
  • the pivoting axis is now pivoted in such a way that the lower part of the intermediate component, on which the supporting part is mounted, is pulled backwards, the overall dimension is not increased because the angular space required by the inclined position of the component mentioned between the two components, namely on the one hand the component which is attached to the support plate and on the other hand the intermediate component on which the support part is mounted is optimally used.
  • the swivel angle limitation expediently limits the swivel angle to a dimension which is between 3.5 degrees and 5.5 degrees, preferably to 4 degrees or to 5 degrees.
  • an arbitrarily controllable tilt-swivel drive is provided between the component which is provided for mounting on the support plate of the lift truck and the intermediate component on which the support part is pivotally mounted. It is particularly expedient if this tilt-swivel drive is then simultaneously configured as a tilt-swivel angle limiting device, that is to say specifies the limit for the maximum and the minimum swivel.
  • This tilt-swivel drive is preferably designed as at least one cylinder piston unit arranged at a distance from the swivel axis arranged parallel to the support plate.
  • each of the two gripper arms is actuated by a double-acting cylinder piston unit.
  • a particularly expedient embodiment results from the fact that a branch line leading to the cylinder piston unit of the tilting pivot drive is connected to the line leading to the pressure chamber of the cylinder piston unit that is pressurized to close the gripper arms, so that when the cylinder piston units of the gripper arms act in the closing direction are, the cylinder piston unit or the cylinder piston units of the tilt swivel drive are pressurized and vice versa.
  • a particularly expedient further development for this results from the fact that a two-port, two-way valve (open-close valve) is arranged in the branch line leading to the cylinder piston assembly of the tilt swivel drive, so that when the cylinder piston assembly or the cylinder piston assemblies of the tilt swivel drive also Pressure is applied, this valve can be closed and maintains the pressure in this cylinder piston unit or these cylinder piston units even when the cylinder piston units of the gripper arms are depressurized be burdened.
  • This valve can be operated arbitrarily.
  • a particularly expedient embodiment results, however, from the fact that the valve can be actuated mechanically by means of a switching cam depending on the pivoting position of the supporting part relative to the lifting carriage or the component attached to the lifting carriage.
  • 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 lifting frame 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 gripping arm 10 is also connected to the piston rod of a cylinder-piston unit, the cylinder 29 of which is mounted in the supporting part 7 by means of a bearing pin 31, the gripping arm 10 being mounted in the supporting 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 is Space 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 a non-return valve 49 which can be opened from the line 44 is arranged 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 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 32 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)
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 true EP0385242A2 (fr) 1990-09-05
EP0385242A3 EP0385242A3 (en) 1990-12-27
EP0385242B1 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)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2403292A1 (fr) * 1977-09-19 1979-04-13 Cascade Corp Pince de gerbeur pour manutention de rouleaux de papier
EP0085549A2 (fr) * 1982-02-01 1983-08-10 Cascade Corporation Pince à bobines de papier pour chariot élévateur comportant un positionneur de bobine automatiquement ajustable pour saisir des bobines de différents diamètres
US4435119A (en) * 1981-11-16 1984-03-06 Cascade Corporation Lift truck load clamp having power-actuated pivotal subframe for handling paper rolls

Family Cites Families (9)

* 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
DE8032810U1 (de) * 1980-12-10 1981-04-02 Eaton Ltd., Hounslow, Middlesex Zwischen zwei im wesentlichen senkrechten fuehrungssaeulen eines gabelstaplers hoehenverschieblich gelagerter hubschlitten
US4516905A (en) * 1982-11-17 1985-05-14 Hoover Universal, Inc. Roll clamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2403292A1 (fr) * 1977-09-19 1979-04-13 Cascade Corp Pince de gerbeur pour manutention de rouleaux de papier
US4435119A (en) * 1981-11-16 1984-03-06 Cascade Corporation Lift truck load clamp having power-actuated pivotal subframe for handling paper rolls
EP0085549A2 (fr) * 1982-02-01 1983-08-10 Cascade Corporation Pince à bobines de papier pour chariot élévateur comportant un positionneur de bobine automatiquement ajustable pour saisir des bobines de différents diamètres

Also Published As

Publication number Publication date
ES2047726T3 (es) 1994-03-01
DE3905994A1 (de) 1990-09-06
DE3905994C2 (de) 1994-09-29
EP0385242A3 (en) 1990-12-27
EP0385242B1 (fr) 1993-12-22

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