FR2810613A1 - Reversing levers for raising forklift truck forks located in front of each fork has one end articulated on truck non-raisable part and other end on raisable chassis - Google Patents
Reversing levers for raising forklift truck forks located in front of each fork has one end articulated on truck non-raisable part and other end on raisable chassis Download PDFInfo
- Publication number
- FR2810613A1 FR2810613A1 FR0007996A FR0007996A FR2810613A1 FR 2810613 A1 FR2810613 A1 FR 2810613A1 FR 0007996 A FR0007996 A FR 0007996A FR 0007996 A FR0007996 A FR 0007996A FR 2810613 A1 FR2810613 A1 FR 2810613A1
- Authority
- FR
- France
- Prior art keywords
- fork
- raisable
- lever
- lifting
- chassis
- 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
Links
- 230000000087 stabilizing effect Effects 0.000 description 4
- 239000000872 buffer Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
- B62B3/06—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground
- B62B3/0625—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground using rigid mechanical lifting mechanisms, e.g. levers, cams or gears
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
Description
L'invention qui se rapporte aux chariot de manutention et de levage du genre transpalettes ou gerbeurs, concerne plus particulièrement un dispositif à leviers de renvoi en deux parties permettant d'associer le levage du talon des fourches à celui des extrémités de fourches. The invention which relates to handling and lifting trolleys of the pallet truck or stacker type, relates more particularly to a device with two-part return levers making it possible to associate the lifting of the heel of the forks with that of the ends of the forks.
Dans ces chariots, les extrémités des bras de fourches reposent sur des galets porteurs tandis que 1e châss du chariot est habituellement monté sur trois points d'appui constitués d'une roue centrale motrice et directrice encadrée de roulettes stabilisatrices montées des ressorts ou tampons élastiques. Mais cette disposition particulière ne donne cependant pas toujours satisfaction, car sur des plans inclinés ou en virage, l'écrasement d'une roulette fait pencher le chariot, au risque du renversement de charge. In these carriages, the ends of the fork arms rest on support rollers while the carriage frame is usually mounted on three support points consisting of a central driving and directing wheel framed by stabilizing rollers mounted on springs or elastic buffers. However, this particular arrangement does not always give satisfaction, because on inclined or cornering planes, the crushing of a caster tilts the trolley, at the risk of the load reversing.
Pour éviter ces risques on connaît la solution qui cons'ste à répartir les appuis sur les roulettes stabilisatrices à l'aide d'un palonnier constitué d'un tube de liaison en forme de U placé horizontalement en arrière de l'appareil, et dont chaque extrémité coopère avec tige support d'une roue stabilisatrice. Ce palonnier répartiteur d'appui permet au chariot de garder une bonne stabilité quel que soient les inégalités du sol, mais aussi d'améliorer l'adhérence de la roue motrice. To avoid these risks, the solution is known which consists of distributing the supports on the stabilizing rollers using a lifting beam consisting of a U-shaped connecting tube placed horizontally behind the device, and of which each end cooperates with the support rod of a stabilizing wheel. This spreader support spreader allows the trolley to keep a good stability whatever the unevenness of the ground, but also to improve the grip of the driving wheel.
I1 est également connu d'associer à la partie arrière non relevable d'un chariot transpalette, un châssis mobile relevable solidaire des fourches, lequel châssis mobile étant soulevé par un vérin en appui sur le socle la part' non relevable. Pour que l'extrémité avant des fourches se soulève en même temps que le châssis mobile c' -à-dire 1e talon des fourches, il est habituel de monter, en avant de la roue centrale, un tube de liaison horizontal portant à chaque extrémité un levier de renvoi iculé sur une bielle de renvoi qui s'étend sous la fourche jusqu'à un étrier pivotant monté en bout de fourche. La levée du châssis mobile fait pivoter les leviers de renvoi et les étriers pivotants pour que les galets porteurs s'écartent des bouts de fourche. On a donc une liaison mécanique entre la partie élevable et la partie non élevable de l'appareil, ce qui présente l'avantage d'assurer parfaite stabilité aux efforts latéraux. I1 is also known to associate with the non-liftable rear part of a pallet truck, a liftable mobile chassis secured to the forks, which movable chassis being lifted by a jack bearing on the base the non-liftable part. In order for the front end of the forks to be raised at the same time as the movable chassis, that is to say the heel of the forks, it is usual to mount, in front of the central wheel, a horizontal connecting tube carrying at each end a return lever iculated on a return rod which extends under the fork to a pivoting stirrup mounted at the end of the fork. Lifting the movable chassis rotates the idler levers and the pivoting stirrups so that the support rollers move away from the fork ends. There is therefore a mechanical connection between the lifting part and the non-lifting part of the device, which has the advantage of ensuring perfect stability to lateral forces.
Cependant le tube de liaison horizontal traverse completement le châssis et limite de ce fait disponibilité du volume adjacent, et par conséquent la compacité de l'appareil. De plus, avec ce type d'appareil on ne peut pas monter des fourches avec des écartements différents. However, the horizontal connecting tube completely crosses the chassis and thereby limits the availability of the adjacent volume, and therefore the compactness of the device. In addition, with this type of device you cannot mount forks with different spacings.
'invention vise à éviter ces inconvénients en proposant l'emploi de deux leviers de renvoi indépendants l'un de l'autre et non reliés par un tube de liaison, ces leviers de structure particulière étant de surcroi réversibles, permettant ainsi le montage des fourches selon deux écartements. The invention aims to avoid these drawbacks by proposing the use of two independent return levers one from the other and not connected by a connecting tube, these levers of particular structure also being reversible, thus allowing the mounting of the forks according to two spacings.
L'invention a donc pour objet principal un dispositi pour le relevage des fourches d'un chariot de type transpalette, dont les fourches sont liées à un châss' mobile relevable par rapport à une partie non élevable, et comportant des leviers de renvoi associant le levage des extrémités de fourche à celui de leurs talons, dispositif selon lequel, devant chaque fourche est disposé un levier de renvoi dont une extrémité est directement articulée sur la partie non élevable du chariot et dont l'autre l'est sur le châssis mobile relevable, les extrémités du levier formant des paliers étant décalées latéralement l'une par rapport à l'autre. The main object of the invention is therefore a device for lifting the forks of a pallet truck-type carriage, the forks of which are linked to a movable frame which can be lifted relative to a non-liftable part, and comprising return levers associating the lifting the ends of the fork to that of their heels, device according to which, before each fork is disposed a return lever, one end of which is directly articulated on the non-lifting part of the carriage and the other of which is on the lifting movable chassis , the ends of the lever forming bearings being offset laterally with respect to each other.
Selon un mode particulier de réalisation, le socle la partie non élevable du chariot porte deux potences latérales symétriques par rapport à l'axe longitudinal, levier de renvoi étant articulé sur chaque potence. According to a particular embodiment, the base of the non-liftable part of the carriage carries two lateral brackets symmetrical with respect to the longitudinal axis, the return lever being articulated on each bracket.
Avantageusement, le levier de renvoi a la forme générale d'une crosse équipée de paliers d'extrémité, un pal' étant formé de deux ailes coiffant la potence correspondante, et l'autre étant également formé de deux ailes pour son articulation sur le châssis mobile. D'autres caractéristiques particulières et avantages de l'invention ressortiront de la description qui suivre d'un exemple non limitatif de réalisation dans lequel ' est fait référence aux dessins annexés qui représentent Figure 1, une vue en coupe verticale d'un chariot Figure 2, une vue en plan du chariot de la figure 1, Figure 3, une vue en coupe, à plus grande échelle, d'un levier de renvoi, Figure 4, une vue en plan de ce levier de renvoi. Advantageously, the return lever has the general shape of a stock fitted with end bearings, one pal 'being formed by two wings covering the corresponding bracket, and the other being also formed by two wings for its articulation on the chassis. mobile. Other particular characteristics and advantages of the invention will emerge from the description which follows of a nonlimiting exemplary embodiment in which 'reference is made to the appended drawings which represent Figure 1, a view in vertical section of a carriage Figure 2 , a plan view of the carriage of Figure 1, Figure 3, a sectional view, on a larger scale, of a return lever, Figure 4, a plan view of this return lever.
Le chariot montré sur les figures 1 et 2 comprend essentiellement une partie 1 non élevable recevant notamment le moteur de translation 2 et une partie relevable formé par un châssis mobile 3 comportant les fourches 4. The carriage shown in FIGS. 1 and 2 essentially comprises a non-lifting part 1 receiving in particular the translation motor 2 and a lifting part formed by a mobile chassis 3 comprising the forks 4.
On voit (à gauche sur les figures) que le moteur 2 est monté sur un socle 5 de la partie 1, ainsi qu'un vérin 6 dont la tête mobile soulève le châssis 3. We see (on the left in the figures) that the motor 2 is mounted on a base 5 of part 1, as well as a jack 6 whose movable head lifts the chassis 3.
Le socle repose sur une roue motrice centrale 7, ainsi que sur deux roulettes stabilisatrices latérales . Un palonnier 10 en forme de U est placé horizontalement en arriere du bloc moteur ; il est maintenu par des brides 11. Chacune de ses extrémités coopère avec la tige support 12 d' roulette 9. The base rests on a central drive wheel 7, as well as on two lateral stabilizing rollers. A U-shaped spreader 10 is placed horizontally behind the engine block; it is held by flanges 11. Each of its ends cooperates with the support rod 12 of the caster 9.
Sur chacune de deux potences 13 s'étendant verticalement sous les côtés dû socle 5, symétriquement par rapport à l'axe longitudinal de l'appareil, est articulé un levier de renvoi 14, par l'intermédiaire d'un axe 15. On each of two brackets 13 extending vertically under the sides of the base 5, symmetrically with respect to the longitudinal axis of the device, is articulated a return lever 14, by means of an axis 15.
Un levier 14 est représenté plus en détail aux figures 3 4. On voit qu'il a la forme générale d' crosse équipée de paliers d'extrémité 16 et 17. Un palier est formé d'un côté par deux ailes (16a, 16b) du levier 14, destinées à coiffer la potence correspondante pour recevoir l'axe 15. De l'autre côté le palier 17 est également formé par deux ailes (17a, 17b) de levier 14, qui ont un écartement moindre que celui des ailes (16a, 16b) et qui sont latéralement décalées par rapport à elles. Le palier 17 sert à recevoir un axe 18 d'articulation du levier 14 sur le châssis mobile 3. On voit notamment à la figure 1 qu'une bielle de renvoi 19 s'étend sous la fourche 4. Son extrémité, du côté du châssis de l'appareil, s'articule sur un pivot 20 monté la base du levier 14 du côté du palier 17. De l'autre côté il tourillonne sur un étrier pivotant 21 monté en bout de fourche, portant le galet porteur 22. A lever 14 is shown in more detail in FIGS. 3 4. It can be seen that it has the general shape of a stick fitted with end bearings 16 and 17. A bearing is formed on one side by two wings (16a, 16b ) of the lever 14, intended to cover the corresponding bracket to receive the axis 15. On the other side the bearing 17 is also formed by two wings (17a, 17b) of lever 14, which have a spacing less than that of the wings (16a, 16b) and which are laterally offset from them. The bearing 17 serves to receive an axis 18 of articulation of the lever 14 on the movable chassis 3. It can be seen in particular in FIG. 1 that a return rod 19 extends under the fork 4. Its end, on the side of the chassis of the device, is articulated on a pivot 20 mounted on the base of the lever 14 on the side of the bearing 17. On the other side it pivots on a pivoting stirrup 21 mounted at the end of the fork, carrying the support roller 22.
Lors de la commande de levée des fourches 4, le vérin 6 assure la montée du châssis mobile 3 et des fourches. Ce mouvement, par l'intermédiaire de l'axe 18 assure le basculement du levier 14 qui pivote sur l'axe fixe 15. Cela entraîne donc le déplacement du pivot 20 (vers la droite figure 1) et par conséquent de la bielle de renvoi 19 qui fait pivoter l'étrier 21. Lés galets 22 s'écartent donc des bouts de fourches, et cet écartement est asservi au mouvement de montée du châssis mobile. When the lifting of the forks 4 is controlled, the jack 6 ensures the mounting of the mobile chassis 3 and the forks. This movement, via the axis 18 ensures the tilting of the lever 14 which pivots on the fixed axis 15. This therefore causes the displacement of the pivot 20 (to the right in FIG. 1) and consequently of the return rod 19 which rotates the stirrup 21. The rollers 22 therefore deviate from the ends of the forks, and this spacing is controlled by the upward movement of the mobile chassis.
Du fait que les deux leviers de renvoi sont directement montés sous le socle 5 de la partie fixe de l'appareil, il n'y a plus de tube de liaison transversale entre les deux, ce qui libère un volume intéressant en avant du moteur. Cela permet notamment de réduire la cote entre la face de la batterie côté charge et la face du châssis du côté opposé. Because the two return levers are directly mounted under the base 5 of the fixed part of the device, there is no longer a transverse connection tube between the two, which frees up an interesting volume in front of the engine. This allows in particular to reduce the dimension between the face of the battery on the charge side and the face of the chassis on the opposite side.
La forme particulière du levier de renvoi 14 dont les paliers 16 et 17 sont décalés l'un par rapport à l'autre, permet de les intervertir. Ainsi, en se référant à la figure 2, on voit que si on place le levier de gauche à la place du droit, et inversement, on va modifier l'écartement des paliers 17. On peut donc, avec les mêmes leviers, monter les fourches sur l'appareil selon deux écartements possibles, en fonction des besoins.The particular shape of the return lever 14 whose bearings 16 and 17 are offset with respect to each other, allows them to be inverted. Thus, with reference to FIG. 2, we see that if we place the left lever in place of the right, and vice versa, we will modify the spacing of the bearings 17. We can therefore, with the same levers, mount the forks on the device at two possible spacings, depending on requirements.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0007996A FR2810613B1 (en) | 2000-06-22 | 2000-06-22 | RETURN LEVER DEVICE FOR LIFTING THE FORKS OF A TRANSPALETTE-TYPE TROLLEY |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0007996A FR2810613B1 (en) | 2000-06-22 | 2000-06-22 | RETURN LEVER DEVICE FOR LIFTING THE FORKS OF A TRANSPALETTE-TYPE TROLLEY |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2810613A1 true FR2810613A1 (en) | 2001-12-28 |
FR2810613B1 FR2810613B1 (en) | 2002-10-18 |
Family
ID=8851552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0007996A Expired - Lifetime FR2810613B1 (en) | 2000-06-22 | 2000-06-22 | RETURN LEVER DEVICE FOR LIFTING THE FORKS OF A TRANSPALETTE-TYPE TROLLEY |
Country Status (1)
Country | Link |
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FR (1) | FR2810613B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004054866A1 (en) * | 2002-12-18 | 2004-07-01 | Bt Industries Ab | Electrically driven truck |
EP1935750A2 (en) * | 2006-12-22 | 2008-06-25 | OM Carrelli Elevatori S.p.A. | Elevating truck fleet |
WO2024011585A1 (en) * | 2022-07-15 | 2024-01-18 | 孙宝锋 | Manual forklift |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2993703A (en) * | 1956-12-31 | 1961-07-25 | Barrett Cravens Co | Lift truck |
FR1500171A (en) * | 1966-08-03 | 1967-11-03 | Fenwick Manutention Soc Ind | Advanced drawbar for handling vehicle and in particular for pallet truck |
-
2000
- 2000-06-22 FR FR0007996A patent/FR2810613B1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2993703A (en) * | 1956-12-31 | 1961-07-25 | Barrett Cravens Co | Lift truck |
FR1500171A (en) * | 1966-08-03 | 1967-11-03 | Fenwick Manutention Soc Ind | Advanced drawbar for handling vehicle and in particular for pallet truck |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004054866A1 (en) * | 2002-12-18 | 2004-07-01 | Bt Industries Ab | Electrically driven truck |
EP1935750A2 (en) * | 2006-12-22 | 2008-06-25 | OM Carrelli Elevatori S.p.A. | Elevating truck fleet |
EP1935750A3 (en) * | 2006-12-22 | 2008-12-31 | OM Carrelli Elevatori S.p.A. | Elevating truck fleet |
WO2024011585A1 (en) * | 2022-07-15 | 2024-01-18 | 孙宝锋 | Manual forklift |
Also Published As
Publication number | Publication date |
---|---|
FR2810613B1 (en) | 2002-10-18 |
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Owner name: M.L.M., FR Effective date: 20120509 |
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Owner name: LMH SOLUTIONS, FR Effective date: 20160322 |
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