EP0029384A1 - Gabelstapler mit gleichzeitiger Steuerung von verstellbar angetriebenen Roll- und Greifflächen - Google Patents

Gabelstapler mit gleichzeitiger Steuerung von verstellbar angetriebenen Roll- und Greifflächen Download PDF

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Publication number
EP0029384A1
EP0029384A1 EP80401577A EP80401577A EP0029384A1 EP 0029384 A1 EP0029384 A1 EP 0029384A1 EP 80401577 A EP80401577 A EP 80401577A EP 80401577 A EP80401577 A EP 80401577A EP 0029384 A1 EP0029384 A1 EP 0029384A1
Authority
EP
European Patent Office
Prior art keywords
trolley according
crosspiece
crosspieces
lifting
sliding
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
EP80401577A
Other languages
English (en)
French (fr)
Other versions
EP0029384B1 (de
Inventor
Charles Jean Pierre Lèbre
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.)
Individual
Original Assignee
Individual
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
Priority claimed from FR7927278A external-priority patent/FR2468543A1/fr
Application filed by Individual filed Critical Individual
Priority to AT80401577T priority Critical patent/ATE6621T1/de
Publication of EP0029384A1 publication Critical patent/EP0029384A1/de
Application granted granted Critical
Publication of EP0029384B1 publication Critical patent/EP0029384B1/de
Expired 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

Definitions

  • the invention relates to a forklift truck, the rolling surface and the gripping surface of which can be varied synchronously.
  • bins have very diverse formats and, for high capacity and large tonnage bins, they are made to be handled using motorized forklifts.
  • small handling which covers loads varying between 30 kg and 500 kg
  • trolleys are only trolleys adapted to a single tray format, which requires having several trolleys of different formats available.
  • these trolleys are made only to take off the bin from the ground in order to move it and they do not have the option of raising them to stack them, shelving them or placing them at a height suitable for supplying workstations.
  • these trays are made with external reliefs located on the upper edge and also include passages for their grip with the hands in order to handle and stack them, which forces the user to physical efforts in poor conditions.
  • the object of the invention is to remedy the above drawbacks by proposing a trolley whose design allows a single person to easily and relatively easily grasp relatively heavy bins of different formats, and then to be able not only to move them but still lift them within the elevation limits provided in the cart.
  • This trolley is still very useful for the handling and transport by truck of objects which can have very varied formats (household appliances, furniture, etc ...), and it can be motorized by means of an electric motor or a heat engine.
  • the trolley according to the invention is characterized by the fact that its opening surface can be varied as desired, and it is obtained by mobile assembly of two similar and completely independent elements ensuring the rolling function on the ground and the function gripping and elevationo
  • Each element consists of a vertical mast integral at its lower end with a side member carrying the rolling means and along which a support for a lifting arm can slide.
  • the vertical mast and the sliding support each carry horizontal crosspieces designed so that, when the two elements are assembled to form the carriage, the crosspieces carried by one of the elements (which will be called the movable element of the carriage) engage by sliding inside the sleepers carried by the other element (called the fixed element of the carriage).
  • a triple telescopic crossbar system in which, inside the movable internal crossbar, an additional crossbar is disposed in free sliding.
  • This additional cross member which, thanks to the action of a spring system, is automatically placed in the middle of the assembly formed by the external cross member and the internal cross member in cooperation, ensuring perfect rigidity of this set.
  • the invention provides the lifting arms with movable sliding parts in the form of vertical sheets with lower ends having an angled bend inwardly for grasping objects flush with the ground. with very small grip surfaces.
  • the elevation of the fork support of the carriage can be obtained by a central hydraulic cylinder whose movable rod acts by means of a pulley on a synthetic strap, one end of which is connected to a sliding cross member of the support. of forks and the other end of which is connected to the ' riot chassis.
  • this cross member has the necessary games to allow easy sliding of the tubes one inside the other, it is understood that it would be liable to undergo bending under the effect of the load applied to the forks which, when the cross member is fully deployed , would cause a deformation of the parallelism of the slides of the fork support.
  • the ends of this cross are vented in an articulated manner on the fork support while the other cross connecting fork supports, which is integral with these supports, provides rigid assembly of these supports with perfect squareness.
  • the hydraulic lifting system can be variable speed and for this purpose, according to the invention, the piston of the actuator pump is connected to a pedal-shaped actuating lever designed so that the user can do vary the distance between the axis of pivoting of the actuating lever and the axis of articulation of the piston to this lever, thus allowing, depending on the conditions of use of the carriage, to obtain for example a rapid elevation of the carriage empty or at low load and a slow rise but with minimal effort when the truck is at its maximum load.
  • the hydraulic lifting device can comprise two lateral jacks, the movable rod of each cooperating by means of a pinion with a chain fixed on the one hand to a cross member of the fork support and on the other part of the carriage chassis.
  • the invention provides for synchronizing the action of the two jacks by joining the pinions together by means of a telescopic gimbal.
  • Figure 7 is a side view of a variant of the mechanical control of hydraulic elevation.
  • Figures 8 and 9 are views, respectively from the side and rear, of a carriage with hydraulic lifting system with two cylinders according to a third embodiment of the invention.
  • variable surface forklift shown in Figures 1 and 2 is composed of two elements (right and left) each comprising a mast 1, 1 ', welded vertically on a beam 2, 2' which has at its end a yoke 3 receiving in free rotation of a wheel 4 (see figure 2).
  • a mast 1, 1 ' On the mast 1 are fixed at different levels, by their ends, parallel crosspieces 5, 7 for example with a square section.
  • parallel crosspieces 6, 8 inside which are intended to slide the crosspieces 5, 7.
  • On each lower crosspiece 5, 6 is fixed a support 9 on which is mounted a swivel wheel 10.
  • the elongation and retraction movement of the two elements constituting the carriage is obtained by the simultaneous sliding of the crosspieces 5, 6 on the one hand and of the crosspieces 7, 8 on the other hand.
  • This movement, which must be carried out in a free and effortless manner with perfect parallelism of the two carriage elements is obtained by fixing by means of screws 13, on the end of each of the internal crosspieces 5, 7, of a rack 1 known to be able to slide against the underside of the corresponding external crosspiece 6, 8.
  • each rack 11 is obtained by means of a pinion 14 which is intended to mesh with the rack 11 and which is mounted in free rotation on a bearing 15 in the form of a yoke integral with the corresponding external cross member 6, 8.
  • the synchronization of the movements of the two movable internal cross members 5, 7 with respect to the fixed external cross members 6, 8 is obtained by an endless chain 18 which circulates around two pinions d gear 17 mounted on the same axis 16. as the pinions 14.
  • a crank 19, integral with the axis 16 of the upper gear pinion 14, thus makes it possible to control the variation of the width of the carriage to adapt it to the load to be handled.
  • a structure of sliding crosspieces ensuring perfect rigidity of these crosspieces, even when the carriage is in a position of great spacing for gripping objects of large width.
  • a system with three telescopic cross members is produced as shown in FIG. 3 and in which an additional cross member 20 is mounted to slide in the internal cross member 7.
  • the cross member additional 20 has at one end an external relief 20.
  • an automatic positioning adjustment device of the additional cross 20 is provided, the object of this device being, when leaving the internal cross member 7, to automatically drive the additional cross member 20 therewith, then to release the latter while the internal cross member continues its movement.
  • the adjustment device comprises two springs 21, 22 each fixed at one end to the internal wall of the additional cross member 20.
  • the spring 21, located on the side of the internal cross member 7, is in elastic support, through a notch 23 of the cross member 20, on the wall of the inner cross member 7 and is intended to engage, when leaving the cross member 7, in a notch 24 thereof thereby securing the cross members 7 and 20 and thereby ensuring the exit automatic this.
  • the spring 22 is in elastic support, through a notch 25 of the additional cross member 20, on the inner cross member 7 and it will engage in a notch 26 formed at the end of the cross member 7 to come, after a certain stroke cross members 7 and 20 secured to one another, in a notch 27 in the outer cross member 8 which immobilizes the additional cross member 20.
  • a sliding support is provided for receiving, in a fixed or removable manner, forks 28 for gripping and lifting objects to be grasped.
  • This support consists of two identical slides 29 designed to slide freely on the masts 1, 1 'and which, in the embodiment of Figures 1 and 2, are made of T-section tube.
  • the slides 29 are connected between them, in expandable assembly, by upper sliding cross members 30, 31 and lower 32, 33 of an identical operation to the cross members 5, 6, 7, 8.
  • FIGs 4 and 5 there is shown a variant of the forklift according to the invention with hydraulic lifting device.
  • a yoke 34 integral with this cross member, one end of a strap 35 made of synthetic material. vique pass on a pulley 36 which is mounted in free rotation in a yoke 37 integral with the liere end of a pietow rod 38 moving inside the cylinder body 39.
  • the opposite end of the strap 35 is fixed to a yoke 40 integral with the fixed cross member 8.
  • the ends of the sliding lower cross member 32, 33 are fixed by welding to the corresponding slide 29, while the ends of the upper sliding cross member 30, 31 are articulated by a yoke 41 and an axis 42 to the slides 29.
  • the gripping forks 28 are produced in the form of squares with arms of unequal lengths and are designed to be fixed in a removable manner on profiled parts 43 independent of each other and fixed by welding on the slides 29. represented in FIG. 4, in solid line and in dotted line, two possible positions of each fork 28.
  • the shortest arm of each fork 28 is designed to be fixed by hooking on the corresponding section 43 by means of the appropriate form of its upper end 44.
  • the angle of the fork 28 has at its base a longitudinal projection 45 ensuring the locking of the fork by its engagement under the cross-member 33.
  • the forks 28 are produced in square or rectangular profile, so as to be able to adapt removable elements constituted for example by a tube 46 which engages by sliding on the fork 28 and to which is assembled a vertical sheet 47 comprising at its base a folding in aqueque 48r. end that, thanks to the possibility of extending the carriage and by means of the square folding 48 of the sheets 47, it is possible to grasp on the ground, without requiring a prior lifting, all kinds of objects such as handling bins, household appliances, furniture, even leaving only a very small free space compared to the ground.
  • the hydraulic lifting system of the fork supports 29 will now be described, which comprises a manual reciprocating pump controlling the hydraulic cylinder 39.
  • the pump piston (not shown; is immersed in the reservoir 49 of the hydraulic fluid and its rod 50 is connected by a pin 51 to the end of two connecting rods 52 whose opposite ends 53 in the form of yokes are articulated by pins 54 on each side of a double lever 55.
  • a coil spring (not shown) is mounted at inside the tank 49, so that it can slide along the rod 50, stops being provided to limit the stroke of the piston at its high point inside the tank, so as to allow its immediate driving action.
  • an actuating lever 57 having at its end a convexly shaped surface 58 which constitutes a pedal operable by the foot of the user.
  • the actuating lever 57 comes to bear by a stop 59 on the base 60 of the edges of the double lever 55, as seen in FIG. 6, while this lever 57 can be retracted in position vertical (dotted position in Figure 5) and be held in this retracting position by a spring (not shown).
  • the double lever 55 is articulated on an axis 61 mounted in a bore provided in a part 62 fixed by welding to the reservoir 49.
  • Each arm of the double lever 55 has an oblong opening 63 whose base has notches 64 (three to three in number). FIG. 5) intended to selectively receive the corresponding axis of rotation 61.
  • the operation of the hydraulic lifting device is immediately understood from the description above.
  • the double lever 55 having been positioned so that the pins 61 engage in notches 64 opposite the two arms of this lever, the user brings the actuating lever 57 into its position of use where the stop 59 this lever comes to bear on the lever 550
  • the user By pressing with the foot on the pedal 58, the user ensures a downward pivoting of the double lever 55 around the axes 61 and, via the connecting rods 52, actuates the piston to discharge the hydraulic fluid from the reservoir 49 to the jack 39 while ensuring the lifting of the rod 38 and therefore of the forks 28.
  • the return of the actuation lever in the high position being ensured by the spring (not shown) mounted on the piston rod 50 inside the tank 49.
  • the user can modify the speed of elevation of the supports 29 of the forks 28 by modifying the arrangement of the pins 61 inside the notches 64, that is to say by varying the distance between axes 61 and axes 54.
  • the displacement of the lev ier double 58 to modify the arrangement of the axes 61 with respect to the notches 64 is obtained simply by lifting the lever 57 and moving it longitudinally.
  • the double lever 55 can no longer move longitudinally relative to the articulation axis 61 and it is the articulation axis 54 of each connecting rod 52 which can be moved along the oblong slot 63 of the corresponding arm of the double lever 55, to engage in one of the notches 64 provided this time at the upper part of the slot 63.
  • these are connected together by a bar 65 in the shape of a stirrup which has a handle 66 at its central part.
  • the trolley according to the invention can be equipped with a hydraulic lifting system with two lateral jacks as shown in Figures 8 and 9.
  • a synchronized hydraulic lifting system is then used.
  • the rod 67 of each of the two jacks 68 carries at its end a yoke 69 designed to receive a pinion 70 mounted integral with an axis 71 and which passes right through, in free rotation, the cheeks of the yoke 69.
  • Each pinion 70 is intended to cooperate with a lifting chain 72 attached at one end to the sliding fork support 29 comprising the lifting arms 28 and, at the opposite end, to the upper cross member of the extendable frame.
  • a cardan télescopiçue 73 the latter may be formed as two or more rails (three in the form shown), for example in a square section tube.
  • stops are provided housed on each internal slide and constituted by springs 74 whose shape allows engagement in an openwork 75 provided at the end of each outer slide.
  • This device makes it possible, using hydraulics, to have a perfectly synchronized elevation of two or more jacks, whatever the load differences applied to each jack by rebalancing the pressure of the fluid in each jack.

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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)
EP80401577A 1979-11-06 1980-11-05 Gabelstapler mit gleichzeitiger Steuerung von verstellbar angetriebenen Roll- und Greifflächen Expired EP0029384B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401577T ATE6621T1 (de) 1979-11-06 1980-11-05 Gabelstapler mit gleichzeitiger steuerung von verstellbar angetriebenen roll- und greifflaechen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR7927278 1979-11-06
FR7927278A FR2468543A1 (fr) 1979-11-06 1979-11-06 Chariot elevateur a surface de roulage et d'elevation variables synchronises
FR7930911 1979-12-17
FR7930911A FR2471944A2 (fr) 1979-11-06 1979-12-18 Chariot elevateur a surface de roulage et d'elevation variables synchronises

Publications (2)

Publication Number Publication Date
EP0029384A1 true EP0029384A1 (de) 1981-05-27
EP0029384B1 EP0029384B1 (de) 1984-03-14

Family

ID=26221419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401577A Expired EP0029384B1 (de) 1979-11-06 1980-11-05 Gabelstapler mit gleichzeitiger Steuerung von verstellbar angetriebenen Roll- und Greifflächen

Country Status (8)

Country Link
US (1) US4458786A (de)
EP (1) EP0029384B1 (de)
JP (1) JPS5682799A (de)
BR (1) BR8007171A (de)
CA (1) CA1150676A (de)
DE (1) DE3067026D1 (de)
ES (1) ES8201499A1 (de)
FR (1) FR2471944A2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387008B (de) * 1982-03-12 1988-11-25 Gehrig Oskar Manuell betaetigbarer hubwagen, insbesondere zum transport von buero- und schulmoebeln
DE9309543U1 (de) * 1993-06-26 1993-08-26 Wagner Foerdertechnik Displaypaletten-Hubwagen
US5820330A (en) * 1995-03-13 1998-10-13 Focke & Co. (Gmbh & Co.) Apparatus for the reception and transport of reels of packaging material
CN109516403A (zh) * 2019-01-15 2019-03-26 长沙中联恒通机械有限公司 一种同步顶升装置及其控制方法

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950829A (ja) * 1982-09-14 1984-03-24 Osaka Taiyuu:Kk 長尺物運搬車
JPS5953399A (ja) * 1982-10-01 1984-03-28 株式会社大阪タイユ− 長尺物昇降装置
JPS6237540U (de) * 1985-08-27 1987-03-05
JPS62132098U (de) * 1986-02-10 1987-08-20
FR2597807B1 (fr) * 1986-04-24 1990-11-02 Toutenkamion Dispositif et element de manutention-roulage pour conteneurs ou analogues
US4867277A (en) * 1988-09-29 1989-09-19 Sloan William C Portable lifting device and cart
JPH0262585U (de) * 1988-10-31 1990-05-10
US5033758A (en) * 1989-04-04 1991-07-23 Levy Isy R Compressible carrier
US5052882A (en) * 1989-12-04 1991-10-01 Caterpillar Industrial Inc. Apparatus and method for controllably positioning forks of a material handling vehicle
FR2752829B1 (fr) * 1996-08-27 1998-11-06 Loc Manutention Gerbeur modulable a ecartement variable notamment pour la manutention de chassis roulants
FR2754250B1 (fr) * 1996-10-03 1998-11-20 Lebre Charles J P Tablier extensible et retractable en hauteur pour chariot elevateur conventionnel ou a geometrie variable
US20060182582A1 (en) * 2004-10-08 2006-08-17 George Sharpton Hand truck/forklift aparatus
ITMI20070326A1 (it) * 2007-02-20 2008-08-21 Ocme Srl Veicolo a guida automatica con gruppo di sollevamento multipallet perfezionato
US7681691B1 (en) * 2007-04-16 2010-03-23 William Miller Planar object lifting apparatus
US8789654B2 (en) * 2010-08-17 2014-07-29 Jlg Industries, Inc. Mast lift with screw drive and gas strut
US9505596B2 (en) 2010-08-17 2016-11-29 Jlg Industries, Inc. Mast lift with screw drive and gas strut
CN102849657A (zh) * 2012-03-16 2013-01-02 红塔烟草(集团)有限责任公司 叉车叉臂间距手动调整装置
CN103944087A (zh) * 2014-03-11 2014-07-23 沈阳华利能源设备制造有限公司 一种用于搬运铠装移开式开关柜功能车的液压升降车
US9198528B1 (en) * 2014-07-18 2015-12-01 Ian Jordan Pitts Adjustable rack system
US10344487B2 (en) * 2015-08-14 2019-07-09 Oldcastle Light Building Products, LLC Attachment and support members for modular building structures
GB2590982A (en) * 2020-01-13 2021-07-14 Dutypoint Ltd A lifting trolley, base and transportation system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1813596A (en) * 1928-08-27 1931-07-07 Elwell Parker Electric Co Industrial truck
FR1174976A (fr) * 1957-05-06 1959-03-18 Châssis élévateur transporteur à écartement de roues variable
FR1452885A (fr) * 1965-08-05 1966-04-15 Lauravia élévateur à bras repliables
FR1474111A (fr) * 1966-02-07 1967-03-24 Chariot pour le transport de charges permettant le changement du sens d'avancement sans pivotement sur lui-même
US3917093A (en) * 1974-05-06 1975-11-04 Roland E Greaves Mixing bowl lift truck
DE2733829A1 (de) * 1977-07-27 1979-02-15 Schraubenwerk Gaisbach Kg Hubwagen fuer wannenartige behaelter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1390123A (en) * 1916-06-26 1921-09-06 Leon L Gilkey Truck
US3448878A (en) * 1967-07-24 1969-06-10 William Schindler Low bed trailer
JPS4928682U (de) * 1972-06-12 1974-03-12
JPS52128258U (de) * 1976-03-26 1977-09-29
JPS5495448A (en) * 1978-01-13 1979-07-27 Kanai Keisaku Fork lift

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1813596A (en) * 1928-08-27 1931-07-07 Elwell Parker Electric Co Industrial truck
FR1174976A (fr) * 1957-05-06 1959-03-18 Châssis élévateur transporteur à écartement de roues variable
FR1452885A (fr) * 1965-08-05 1966-04-15 Lauravia élévateur à bras repliables
FR1474111A (fr) * 1966-02-07 1967-03-24 Chariot pour le transport de charges permettant le changement du sens d'avancement sans pivotement sur lui-même
US3917093A (en) * 1974-05-06 1975-11-04 Roland E Greaves Mixing bowl lift truck
DE2733829A1 (de) * 1977-07-27 1979-02-15 Schraubenwerk Gaisbach Kg Hubwagen fuer wannenartige behaelter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387008B (de) * 1982-03-12 1988-11-25 Gehrig Oskar Manuell betaetigbarer hubwagen, insbesondere zum transport von buero- und schulmoebeln
DE9309543U1 (de) * 1993-06-26 1993-08-26 Wagner Foerdertechnik Displaypaletten-Hubwagen
US5820330A (en) * 1995-03-13 1998-10-13 Focke & Co. (Gmbh & Co.) Apparatus for the reception and transport of reels of packaging material
CN109516403A (zh) * 2019-01-15 2019-03-26 长沙中联恒通机械有限公司 一种同步顶升装置及其控制方法

Also Published As

Publication number Publication date
CA1150676A (en) 1983-07-26
ES496616A0 (es) 1981-12-16
DE3067026D1 (en) 1984-04-19
ES8201499A1 (es) 1981-12-16
FR2471944B2 (de) 1985-05-10
BR8007171A (pt) 1981-05-12
EP0029384B1 (de) 1984-03-14
JPS5682799A (en) 1981-07-06
JPS6214479B2 (de) 1987-04-02
FR2471944A2 (fr) 1981-06-26
US4458786A (en) 1984-07-10

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