WO2001066381A1 - Hayon elevateur escamotable sous le plancher d'un vehicule ou analogue - Google Patents
Hayon elevateur escamotable sous le plancher d'un vehicule ou analogue Download PDFInfo
- Publication number
- WO2001066381A1 WO2001066381A1 PCT/FR2001/000647 FR0100647W WO0166381A1 WO 2001066381 A1 WO2001066381 A1 WO 2001066381A1 FR 0100647 W FR0100647 W FR 0100647W WO 0166381 A1 WO0166381 A1 WO 0166381A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rod
- jack
- floor
- carriage
- arms
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/44—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element
- B60P1/4414—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element and keeping the loading platform parallel to the ground when raising the load
- B60P1/445—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element and keeping the loading platform parallel to the ground when raising the load the loading platform, when not in use, being stored under the load-transporting surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/44—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element
Definitions
- the invention relates to a retracting system under the floor of a vehicle or the like, of a tail lift comprising a lifting platform whose vertical displacement from the level of the floor to the ground and vice versa is obtained by a lifting mechanism of the deformable parallelogram type.
- Lifting tailgates have been known for a long time, notably equipping motor vehicles and more particularly vehicles intended for disabled people. Most of these tail lifts are installed in the rear part of the vehicle to facilitate access for people in wheelchairs either by a side door, or more generally by the rear door of the vehicle.
- Many solutions have already been described for proposing lifting devices designed on the basis of a platform which can be moved from the vehicle floor to the ground and vice versa, by means of swing arms mounted in deformable parallelogram and actuated by one or more hydraulic cylinders.
- a particularly advantageous solution has already been proposed in the European patent published under the number EP-0.119.914 by the same inventor.
- This type of tailgate for automatically raising the tailgate platform is constituted by at least one deformable parallelogram under the action of motor means, the arm of the parallelogram intended to support the lifting platform extending beyond its point. articulation to the adjacent lower arm thus defining an extension, the free end of which is articulated to said lifting platform, in such a way that in cooperation with a fixed connecting rod, this platform can be raised at the end of the race and released thus the vehicle door which can then be closed.
- This type of tail lift for vehicles even very simplified, is necessarily very bulky and occupies whatever happens a significant part of the interior volume of the vehicle.
- This lifting device comprises a carriage capable of sliding in a support structure positioned under the floor of a vehicle and a lifting platform articulated to the carriage by a deformable parallelogram comprising lower lateral arms and upper lateral arms integral with the carriage by pivot links so as to operate between a raised position and a lowered position.
- the external lifting platform is brought from its lowered position to its raised position or vice versa by means of a jack, the end of the piston of which is pivotally mounted on a crosspiece connecting the upper lateral arms of the lifting platform. and whose cylinder is pivotally mounted on a crosspiece connecting the side bars of the carriage.
- the jack is actuated, the latter pivots around its respective pivots in order to bring the extreme lifting platform from its raised position to its lowered position or vice versa.
- the main object of the present invention is to provide a retraction system under the floor of a vehicle and in particular of a vehicle intended for the disabled, of a very compact foot lift when in the retracted rest position. under the floor.
- a tail lift of the same type as that described in the European patent already cited which is particularly economical in that it comprises a platform whose vertical displacement from the level from the ground to the floor is obtained by a lifting mechanism comprising at least two oscillating arms in parallel around fixed pivots according to a deformable parallelogram, one of the arms of which, said motor arm, is rotated about its fixed pivot by a jack, itself supplied by a pressurized fluid coming from an autonomous power station, the fixed pivots of said oscillating arms, the drive jack (s) as well as the control and safety members of the assembly being mounted on a carriage capable of moving under the floor, parallel to it, thanks to manual or automatic guide and drive elements known per se (guide rail and ent gearbox and endless chain for example), from an interior position, called the rest position, where the tail lift is retracted to a position, called the working position, where it can deploy vertically; the retraction system according to the invention is remarkable in that the where the jacks are
- the platform in particular does not come to rub with the lower part of the protective box; this would for example be the case when the control cylinder has a slight leak, for example after an extended storage time at a standstill, which would have the effect of tilting the lifting mechanism down and causing friction platform on the bottom of the cabinet which could permanently block the carriage exit system.
- the retractable tailgate system according to the invention is remarkable in that it comprises locking means consisting of a latch articulated on the carriage against which the rod of the jack abuts when it is in position where the arms are horizontal, during the movement of the carriage and when the latter is in the retracted position of rest; means for releasing the latch are automatically implemented when the tail lift arrives in the working exit position.
- FIG. 1 is a representation in elevation of a longitudinal section in the vertical plane of the tailgate according to the invention in the rest position, retracted under the floor,
- FIG. 2 is a partial sectional representation of the device shown in Figure 1, when is in the working position, that is to say the elevator extended but in the mechanically locked position,
- FIG. 3 is a representation identical to FIG. 2 in the intermediate operating position allowing the automatic locking device to be released
- FIG. 4 is a representation in longitudinal section along the vertical plane of symmetry of the jack equipping the device shown in the preceding figures,
- FIGS 5 to 7 are a schematic representation of a first drive variant of a motor swing arm using an intermediate thrust link connecting the cylinder rod to the drive crank, in three positions of the platform shape, horizontal (figure 5), on the ground (figure 6), flush with the floor (figure 7),
- FIGS 8 to 9 are schematic representations of a second variant of the invention showing the coupling between the rod of the jack mounted inverted and the crank head driving a swinging arm in three positions of the platform , on the ground (figure 8), flush with the floor (figure 9) and horizontally (figure 10).
- the retraction system under the floor 1 of a vehicle (not shown in the figures) of a tail lift 2, mounted in a schematic form in Figure 1, comprises for l 'essential a platform 3 whose vertical displacement from the level of the floor 1 to the ground is obtained by a lifting mechanism comprising at least two arms 4,5 oscillating in parallel around fixed pivots 6,6' according to a parallelogram deformable, one of the arms of which, known as the driving arm 4, is rotated about its fixed pivot 6 by a jack 7.
- mobile pivots 8,8' are fixed on a yoke 10 supporting in the lower part and forwardly with respect to the oscillating arms 4,5, the platform 3 allowing, by deformation of the parallelogram formed by the two oscillating arms 4,5, the yoke 10 and the articulations formed by the pivots 8,8 ', to raise or lower the platform 3 in a vertical plane, while maintaining a horizontal position, which ultimately allows to move an object or a person on the platform 3 between two levels, for example between the ground and the floor of a vehicle to enter it or vice versa.
- the mechanism for driving the motor arm 4 in rotation about its pivot 6 is obtained by means of a crank 11 advantageously perpendicular to the motor arm 4 providing the driving torque necessary for lifting the platform 3, thanks to a connecting rod 12 articulated between the head 13 of the crank 11 and the end of the rod 14 of the jack 7.
- the fixed pivots 6,6 ′ of the oscillating arms 4,5, the drive cylinder 7 and the control and safety members are mounted on a carriage 15 capable of moving under the floor 1, parallel to the latter, by means of completely conventional guide and drive elements (not shown in the drawings), which of course may be manual or automatic, such as for example rollers guided by rails and an endless chain to drive the carriage 15 back and forth along the floor 1 in order to pass the retraction system of the invention from its rest position to its working position and Conversely ; it will be noted that in the figures, only the side panel of the carriage 15 has been shown to give better readability of the device.
- the jack 7 and the movable elements which it drives must as much as possible, in all their movements, stay in a minimum bulk. To do this, provision has been made to secure the jack 7 directly to the side face (s) of the carriage 15, in such a way that its rod 14 moves parallel to the floor 1 and in the direction of movement of the carriage 15.
- the rod 14 of the jack 7 is located on the same side as the lifting mechanism of the platform 3; according to this construction, the driving arm 4, articulated around its pivot 6 fixed to the carriage 15 is driven by the crank 11 as it has been said, itself articulated to the rod 14 by a thrust link 12 'of dimension and shape such that it can transmit the necessary torque to the motor arm 4; in Figures 6 and 7 in particular, respectively representing the position of the mechanism when the platform is on the ground ( Figure 6), and when the platform is at floor level ( Figure 7) we can clearly see the variation in the distance d between the articulation axis of the motor arm 4 and the thrust line p_ transmitted by the connecting rod 12 '.
- the thrust required for the jack 7 is much greater when the platform is in the high working position, that is to say at the floor level. Indeed, at this instant the jack is in maximum thrust since the distance dp is minimum and therefore the thrust of the rod 14 must be maximum in order to obtain the same lifting torque.
- this second variant of the invention provides, it is possible to mount on the base 71 of the jack 7 a stop 16 adjustable in length, that is to say collinear with the axis of the displacement of the rod 14 of the jack 7.
- This stop 16 is particularly advantageous in that it makes it possible to limit the rotation in the vertical plane and upwards of the motor arm 4, when the head 13 of the crank 11 comes to bear on the stop 16, as schematically shown in Figure 9; according to this embodiment, it suffices to adjust the stop 16 to make the platform 3 coincide with the level of the floor 1.
- the latch release means 21 consist of a part 22 articulated on the carriage and coupled to the latch 21 so that by cooperating with a cam 23 fixed under the floor 1, as soon as the tailgate 2 is in work output position, that is to say outside the enclosure 20, the latch 21 is released from the rod 14 of the jack 7 which is then free to move to activate the lifting mechanism.
- the articulated part 22 is a torsion spring with two branches, extending on either side of a central turn mounted coaxially on the axis of articulation of the latch 21 of which a branch 24a is integral and is supported under said latch 21 and the other branch 24b is shaped to bear on the cam 23 at the precise moment when the carriage 15 reaches the end of the enclosure 20, that is to say when the platform 3 lifting mechanism is located entirely outside of said enclosure, in position to raise platform 3 to floor level or lower it to the ground.
- the rod 14 is biased by the crank 11 of the arm 4 due to the overhang of the tail lift 2 which causes a recoil of the rod and bringing the latch 21 into contact with the stop 25 of the rod 14 preventing the lifting mechanism and the platform 3 from falling against the bottom of the enclosure 20.
- the free branch 24b of the spring 22 comes into contact with the cam 23 as shown in FIG.
- the cylinder body 7 is secured to the vertical metal wall of the carriage 15 by welding.
- this method of attachment will be preferred to a more conventional screw and bolt fixing system, but which would require costly oversizing, given the small thickness of the wall of the carriage, due to the small size of the assembly characterizing the system. of the invention.
- cylinders which are particularly advantageous for the operation of the retraction system according to the invention, formed to form the body of two cylinders concentric 26 and 27, one of which 26 has a thickness sufficient to allow welding to the side wall of the carriage 15 and internally comprises at least two circular grooves 28,29 which are in principle identical and allow to receive rings 30 made of a material with a low coefficient of friction, such as "nylon" for example, sufficiently spaced to guide the rod 14 and at least a third groove 31 making it possible to have a sealing segment 32; the other cylinder 27, of the same internal diameter as the first cylinder, is welded thereto in its extension; this cylinder 27 has a thickness less than the first allowing a saving of material, thickness however sufficient to form the chamber of the jack 7 which is closed at its end by a welded metal base 71, of suitable thickness to receive as is has already said, the stop 16 making it possible to limit the movement of the platform 3 beyond the floor 1.
- the stop 16 can be produced in any way and in particular, it can be a simple bolt coming to be screwed inside the base 71, a lock nut 161 coming to counter-stop the stop 16 on the base 71 when it is correctly adjusted.
- the rod 14 cooperating with the jack body which has just been described consists of a simple cylindrical metal bar, as shown in FIG. 4, capable of sliding freely inside the "nylon" rings 30 under the thrust of a pressurized fluid accessing the interior of the chamber consisting of the interior of the cylinder 27; at the free end of this bar, a hinge 33 is welded intended to receive the connecting rods 12, 12 ′ for driving the motor arm 4.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
- Vehicle Step Arrangements And Article Storage (AREA)
- Loading Or Unloading Of Vehicles (AREA)
- Air Bags (AREA)
- Seal Device For Vehicle (AREA)
- Error Detection And Correction (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60132308T DE60132308D1 (de) | 2000-03-06 | 2001-03-06 | Hebebühne, die unter einem fahrzeugboden oder dergleichem einklappbar ist |
AU2001240771A AU2001240771A1 (en) | 2000-03-06 | 2001-03-06 | Lifting tail gate retractable under the floor of a motor vehicle or the like |
EP01911849A EP1263623B1 (fr) | 2000-03-06 | 2001-03-06 | Hayon elevateur escamotable sous le plancher d'un vehicule ou analogue |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR00/02854 | 2000-03-06 | ||
FR0002854A FR2805784B1 (fr) | 2000-03-06 | 2000-03-06 | Hayon elevateur escamotable sous le plancher d'un vehicule ou analogue |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001066381A1 true WO2001066381A1 (fr) | 2001-09-13 |
Family
ID=8847766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/000647 WO2001066381A1 (fr) | 2000-03-06 | 2001-03-06 | Hayon elevateur escamotable sous le plancher d'un vehicule ou analogue |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1263623B1 (fr) |
AT (1) | ATE383272T1 (fr) |
AU (1) | AU2001240771A1 (fr) |
DE (1) | DE60132308D1 (fr) |
FR (1) | FR2805784B1 (fr) |
WO (1) | WO2001066381A1 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2899089A (en) * | 1959-08-11 | ajero | ||
US4187766A (en) * | 1978-06-16 | 1980-02-12 | Clark Equipment Company | Fluid device and method for making |
JPS59114136A (ja) * | 1982-12-17 | 1984-07-02 | Nippon Furuhaafu Kk | 単動油圧シリンダによる揺動機構の駆動装置 |
EP0629524A1 (fr) * | 1988-11-05 | 1994-12-21 | Ricon Uk Limited | Véhicules et élevateurs de véhicules |
DE4443178C1 (de) * | 1994-11-23 | 1996-03-28 | Mannesmann Ag | Direktgesteuertes Wegeschieberventil |
NL1008208C2 (nl) * | 1998-02-05 | 1999-08-06 | Terberg Specials B V | Transportvoertuig. |
-
2000
- 2000-03-06 FR FR0002854A patent/FR2805784B1/fr not_active Expired - Fee Related
-
2001
- 2001-03-06 EP EP01911849A patent/EP1263623B1/fr not_active Expired - Lifetime
- 2001-03-06 AU AU2001240771A patent/AU2001240771A1/en not_active Abandoned
- 2001-03-06 DE DE60132308T patent/DE60132308D1/de not_active Expired - Lifetime
- 2001-03-06 WO PCT/FR2001/000647 patent/WO2001066381A1/fr active IP Right Grant
- 2001-03-06 AT AT01911849T patent/ATE383272T1/de not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2899089A (en) * | 1959-08-11 | ajero | ||
US4187766A (en) * | 1978-06-16 | 1980-02-12 | Clark Equipment Company | Fluid device and method for making |
JPS59114136A (ja) * | 1982-12-17 | 1984-07-02 | Nippon Furuhaafu Kk | 単動油圧シリンダによる揺動機構の駆動装置 |
EP0629524A1 (fr) * | 1988-11-05 | 1994-12-21 | Ricon Uk Limited | Véhicules et élevateurs de véhicules |
DE4443178C1 (de) * | 1994-11-23 | 1996-03-28 | Mannesmann Ag | Direktgesteuertes Wegeschieberventil |
NL1008208C2 (nl) * | 1998-02-05 | 1999-08-06 | Terberg Specials B V | Transportvoertuig. |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 008, no. 234 (M - 334) 26 October 1984 (1984-10-26) * |
Also Published As
Publication number | Publication date |
---|---|
EP1263623A1 (fr) | 2002-12-11 |
DE60132308D1 (de) | 2008-02-21 |
FR2805784A1 (fr) | 2001-09-07 |
ATE383272T1 (de) | 2008-01-15 |
EP1263623B1 (fr) | 2008-01-09 |
AU2001240771A1 (en) | 2001-09-17 |
FR2805784B1 (fr) | 2002-05-24 |
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