EP3384103A1 - Dispositif d'assistance au franchissement d'un obstacle par un véhicule - Google Patents
Dispositif d'assistance au franchissement d'un obstacle par un véhiculeInfo
- Publication number
- EP3384103A1 EP3384103A1 EP16813095.3A EP16813095A EP3384103A1 EP 3384103 A1 EP3384103 A1 EP 3384103A1 EP 16813095 A EP16813095 A EP 16813095A EP 3384103 A1 EP3384103 A1 EP 3384103A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- frame
- arm
- carriage
- flap
- 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
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/002—Ramps
Definitions
- the present invention relates to a device for assisting the crossing of one or more steps or a threshold by a vehicle, in particular for persons with reduced mobility who move by means of a wheelchair, or for people moving a wheeled cart for the transportation of objects.
- Such a threshold has a height generally from one to several tens of centimeters and is an obstacle often impassable for a person with reduced mobility or delivery carts.
- One solution to allow the crossing of such a step by a vehicle or wheeled trolley is to set up an access ramp.
- a major constraint on the implementation of such a ramp is a lack of permanent encroachment on public roads, sidewalks and / or roadways, passageways, etc.
- the deployable and retractable ramps offer an appreciable service but suffer from a complex mechanics. Such ramps require a significant free deployment distance that limits the possibilities of implementation. The irregularities of sidewalk solicit their structure.
- FR 2947224 discloses a tilting telescopic ramp.
- An assistance device for crossing an obstacle by a wheeled vehicle comprises a stationary frame comprising a bottom and two parallel side walls, a plate provided with two ends, a first end being movable between a high position and a low position in which said plate constitutes a first access ramp, a drive assembly in vertical translation at least of said first end supported by said assembly, a shutter forming a front face of the device in the high position of the plateau and forming a second ramp in the lower position of the plate, the flap being pivotally mounted on the plate at the first end of said plate, and a mechanism for deploying the flap, comprising at least one connecting rod comprising a front end hinged to the flap , the hinge being distant from the top edge and the bottom edge of said flap, a rear end linked to
- the sliders are pawns.
- the pieces are mounted on the connecting rod.
- the mechanism is compact.
- the linear slide is substantially horizontal in the upper position of the plate.
- the mounting of the slide is simple.
- the slideway of the frame is in a circular arc with a substantially vertical lower end, preferably with a radius of between 30 and 280 mm.
- the movement of the shutter ensures a clearance to the front at the beginning of descent of the plate and a support on the ground of the free end of the shutter at the end of descent.
- the slideway of the frame has an upper end inclined at an angle of between 50 and 75 ° relative to the vertical. The movement of the shutter ensures a quick release forward at the beginning of descent of the plateau.
- the axis of articulation of the flap is disposed at a height of between 40 and 60% of the distance between the top edge and the bottom edge of said flap. In mounting case higher, the torque exerted significantly decreases. If mounted lower, the joint may rub on the ground.
- the rod being inclined at an angle of between 10 and 35 ° relative to the horizontal in the upper position of the plate and the rod being substantially horizontal in the lower position of the plate.
- the stroke of the connecting rod is less than the stroke of the free end of the flap.
- the connecting rod can be simple and robust form.
- the connecting rod is made from a blank of cut sheet metal.
- the connecting rod is of economic manufacture.
- the connecting rod is a straight arm.
- the connecting rod is not very prone to bending.
- the linear slide formed in the plate comprises an elongate plate in which is formed a rectilinear opening accommodating the slide.
- the slide takes the effort while avoiding the efforts of buckling.
- said dish is formed by folding an edge of the tray.
- two symmetrical connecting rods are provided, one connecting rod per side of the frame. The risk of veiling of the shutter is reduced.
- the drive assembly comprises a linear jack mounted under the plate, provided with a stationary end adjacent to said second end and secured to the bottom, and a movable end, a carriage movable in horizontal translation. and driven by said cylinder, said carriage resting on slides mounted on the bottom of the frame, said carriage comprising two pushers, and a pair of arms, the arms being symmetrical, each arm being supported on one of the pushers of the carriage, each arm supporting the first end of the tray; in the retracted position of the actuator, the carriage being close to said second end, the arms being in the low position and the first end being in the ramp position, and in the extended position of the actuator, the carriage being close to said first end; , the arms being in the up position and the first end being in erected position.
- the arms are pivotally mounted to the sides of the frame on a substantially horizontal common axis. Swivel operation is reliable. Manufacturing costs are contained.
- each arm is housed in one side of the frame.
- each arm comprises a body made from a cut sheet blank. The arm is of simple construction and compact.
- the finger supporting the first end of the plate is provided with a bearing.
- the finger in contact with the pusher is provided with a bearing.
- the finger comprises a base and a pin passing through a bore in the body of the arm, the base being welded to said body.
- the fingers of an arm are connected by their opposite ends to said body.
- the rigidity of the arm is improved.
- each arm comprises a finger receiving the thrust of the push of the carriage and a finger supporting the first end of the plate.
- each arm is mounted between a side wall of the frame and a cover parallel to said side wall.
- At least one opening in a circular arc is formed in said cover, the fingers being projecting through said opening.
- each arm has a triangular shape, a vertex being located at the pivot axis.
- the arm can be manufactured by cutting sheet metal with complementary shapes reducing the loss of material.
- the triangle is isosceles.
- the straight line passing through the pivot axis of an arm and the plunger of the carriage has an angular stroke, during pivoting, between 50 and 70 °.
- the line passing through the axis of pivoting of an arm and the pusher of the carriage is inclined relative to the vertical, during pivoting, by an angle between -30 and + 30 ° .
- the horizontal displacement of the jack is transformed into a vertical component displacement for the plate with maximum effort in the low position.
- the carriage comprises a frame made of folded sheet.
- the trolley is reliable and robust.
- the frame comprises a base substantially parallel to the bottom of the stationary frame, a rear rim provided with an opening allowing the cylinder to pass, a front rim comprising two zones forming the pushers.
- the pushers are kept compact. The height requirement is low.
- the front flange is substantially vertical.
- the amplification ratio of the arms is between 100 and 110%, preferably greater than 100 and less than 105%.
- the construction is compact. The stroke of the cylinder is limited.
- each arm is mounted on one side of the frame on an axis fixed to said frame.
- the attachment is robust.
- the link arms are hingedly mounted to the carriage and the tray.
- the tray includes a second end pivotally mounted to the rear of the frame about a horizontal axis.
- the tray is tilting to form an easily negotiable access slope.
- the frame includes two pivot axis segments supporting the second end of the platen and two pairs of vertical platens, each pair of platens supporting a pivot axis segment, the platen of a pair being remote the other platinum of said pair, the plates extending to the bottom of the frame so that the compression forces are transferred to said bottom.
- the linear jack is electric.
- the carriage has a generally rectangular shape longer than its width, the length of the carriage being perpendicular to the sides of the frame.
- the carriage rests on four guide rails.
- Guide rails rest on the bottom of the frame.
- the carriage may be provided with pads or wheels bearing on the slides.
- the carriage comprises a front edge provided with cutouts forming a housing for a chassis of the tray in the low position.
- the frame comprises a mechanical stop limiting the stroke of the carriage, the arrival in abutment causing a current draw of the electric jack adapted to be detected by a driver of the cylinder.
- the carriage and the movable end of the jack are connected to the vicinity of the edge of the carriage remote from the stationary end of the jack. The stability of the moving carriage is satisfactory.
- the frame of the carriage is made of sheet steel with a thickness of between 1 and 4 mm.
- the plate comprises a frame made of sheet steel with a thickness of between 1 and 4 mm.
- the frame is made of sheet steel with a thickness of between 1 and 4 mm.
- the arms are made of sheet steel with a thickness of between 1 and 4 mm.
- the flap is made of sheet steel with a thickness of between 1 and 4 mm.
- the frame of the carriage, the frame, the flap, the cover and the arms are made of sheet steel of the same thickness of between 2 and 3.5 mm, for example 3 mm.
- the tray includes a frame and an upper plate.
- the top plate can be used for driving or supporting a pavement.
- the tray frame includes a lower surface bearing on the arms.
- the axis comprises a pin passing through a bore formed in the body of the arm, and a base of diameter greater than the diameter of the bore.
- the base can be welded to one side of the frame.
- the pin is projecting relative to the arm and comes in a bore formed in a cover parallel to said side wall of the frame.
- the frame comprises at least one sheet disposed between said side wall and the cover.
- the sheet stiffens said side.
- the sheet may be provided with bores equivalent to the bores of the bonnet and form an extra thickness offering a mounting set.
- FIG. 1 is a schematic perspective view of a device according to an embodiment, in a low position
- FIG. 2 is a schematic perspective view of the device of FIG. 1, in the high position
- FIG. 3 is a schematic perspective view of the device of FIG. 1 without a plate, in the high position
- FIG. 4 is a schematic sectional view in a plane parallel to the side walls of the device of Figure 1 without a plate, in the upper position,
- FIG. 5 is a schematic sectional view in a plane parallel to the side walls of the device of Figure 1 without a plate, in the low position
- FIG. 6 is a schematic perspective view of the device of FIG. 1 without a plate, in the low position
- FIG. 7 is a schematic detail view in section in a plane parallel to the side walls of the device of FIG. 1, in the low position,
- FIG. 8 is an enlargement of FIG. 7,
- FIG. 9 is a view similar to FIG. 8 of the device in the high position
- FIG. 10 is a schematic perspective view of an arm.
- the invention aims to allow the crossing of a difference in altitude resulting in walking.
- the two levels will be distinguished by the terms upper soil and lower soil.
- the entrance to a room, a shop, an office often has a height offset from the outside, whether it is a street open to traffic, a passage pedestrian, a place, etc. Wheelchair users must be able to access this type of building. Deliverymen equipped with trays or trolleys have the same need. To reach a height of one or two steps, heavy lift-type installations are not suitable. It should also respect the appearance of facades, often subject to protective regulations, and their alignment. The structure of the building must be preserved as much as possible, especially the supporting structure of the upper floor of the ground floor in which the entrance must be made easy.
- the assistance device 1 aims to ensure the establishment of a ramp having a slope of less than 20%, or even less than 15, 10 or 5% depending on regulatory or environmental constraints.
- the assistance device 1 is intended to be inserted or embedded in the upper ground, in front of the ground below the level of the access to be crossed.
- the assistance device 1 comprises a frame 2 forming a box 7 inside which is housed the ramp.
- the ramp may have a lifting end, the ramp then being tilting as shown in the drawings.
- the frame 2 has a generally parallelepipedal shape of dimensions adapted to the height of the step, the width of the access and the dimensions of the vehicle envisaged.
- the box may have a height of the order of 5 to 30 centimeters allowing insertion in most floors and floors, such as a concrete slab, brick, or other.
- the assistance device 1 comprises a plate 3 mounted in the frame 2.
- the upper plate constitutes a cover panel.
- the frame 2 is installed so that the upper plate forms a surface flush with the upper floor of the room.
- the plate 3 can be made to be harmonized with the rest of the upper ground, for example by respecting the geometry, the coating, the decor, etc.
- the assistance device 1 comprises a front flap 4 forming a front surface of the step.
- the front flap 4 is generally vertical in the high or rest position of the assistance device 1.
- the front flap 4 is inclined in the active or low position of the assistance device 1.
- the front face 4 of the device 1 may also have an appearance chosen for integration into the facade of the building.
- the frame 2 is stationary in the sense that it forms a stationary structure of the assistance device 1 with respect to its installation environment such as the ground or the sidewalk.
- the frame 2 comprises a bottom 8, parallel side walls 9, 10 forming the sides, a rear wall 11 and support members of the plate 3.
- the term “rear” is used here, as opposed to the front of the device assistance 1 intended to come in the vicinity of a lower floor, for example in front of the building.
- the term “back” can also be seen as synonymous with "inside” in the case of a building.
- the rear wall 11 may be perpendicular to the bottom 8.
- the rear wall 11 is perpendicular at the side walls 9, 10.
- the side walls 9, 10 are perpendicular to the bottom 8.
- the box 7 may be made of sheet steel.
- the front ends of the bottom 8 and the side walls 9, 10 define a mouth of the box 7. During deployment, the flap 4 out of the box 7 by the mouth. The mouth is closed by the flap 4 in the rest position.
- the bottom 8 is mounted in a housing provided for this purpose in the upper floor of the room, slightly inclined outwards, for example by about 1 to 3 °. A slight inclination facilitates evacuation by gravity in case of accidental infiltration of liquid in the casing 7. In addition, the depth of the housing to dig to accommodate the assistance device 1 is reduced to the rear.
- the assistance device 1 is in the low position.
- the rear end or second end of the plate 3 remains substantially at the same height as the top of the rear wall 11.
- the front end or first end of the plate 3 is lowered.
- the front end of the plate 3 rests on the bottom 8.
- the front flap 4 is in the erected position.
- the front flap 4 protrudes from the frame 2.
- the front flap 4 has a lower end protruding forwardly and an upper end adjacent to the front end of the plate 3.
- the side walls 9, 10 and the rear wall 11 comprise a substantially horizontal upper rim 12.
- Said upper flange 12 is continuous.
- Said upper flange 12 is obtained by folding.
- a weld can be provided in the corners.
- the assistance device 1 comprises a pair of covers 13, 14 arranged parallel to the side walls 9, 10.
- the distance between the cover 13, 14 and the corresponding side wall 9, 10 is of the order of 6 to 12 mm.
- the distance between the cover 13, 14 and the corresponding side wall 9, 10 can be determined by washers or preferably sheet metal spacers of shape close to the shape of the covers 13, 14.
- the spacers reinforce the cover and the side wall .
- Apertures are provided in the spacers for accommodating the parts arranged between the cover 13, 14 and the side wall 9, 10, in particular the arms below.
- the cover 13, 14 is fixed to the corresponding side wall 9, 10, for example by screws not shown.
- the covers 13 and 14 also form the sides.
- the covers 13 and 14 are arranged in the box 7.
- the covers 13 and 14 are arranged flush with the front end of the side walls 9, 10.
- the covers 13 and 14 extend between the bottom 8 and the upper flange 12
- the covers 13 and 14 extend from the front end of the box 7 rearwards for a distance less than 50% of the distance between the mouth and the rear wall 11.
- the hoods 13 and 14 have a rectangular envelope.
- Each cover 13, 14 is flat.
- Each cover 13, 14 is made from cut sheet metal.
- Each cover 13, 14 is provided with a notch 15 on a front edge. The notch 15 allows the articulation of the flap 4 to enter the box in the upper position of the plate 3.
- Each cover 13, 14 is provided with a hole 16 adjacent to a rear edge of the cover.
- the bore 16 is close to the upper edge 13.
- the bore 16 serves to accommodate a pin 17 forming a hinge pin.
- the pin 17 comprises an enlarged base 18.
- the base 18 is fixed to the corresponding side wall 9, 10, for example by welding, on the outside of the side wall 9, 10.
- the pin 17 comprises a cylindrical body of revolution, see FIG. 10. The body is projecting in the bore 16. The body may be supported on the cover 13, 14.
- Each cover 13, 14 is provided with an opening 19 in an arc.
- the opening 19 is concavity oriented upwards.
- the opening 19 is distant from the front and rear ends of the cover 13, 14.
- the opening 19 is distant from the upper and lower ends of the cover 13, 14.
- the opening 19 extends over approximately 120 ° of angle.
- the opening 19 is centered on the bore 16.
- the opening 19 has a substantially vertical front end.
- the opening 19 has a front end adjacent to the upper edge 13.
- the opening 19 has a rear end, obscured by the plate 3 in Figure 1, adjacent the bottom 8 and the rear end of the cover 13, 14.
- the lower zone of the opening 19 is located vertically to the bore 16.
- Each cover 13, 14 is provided with an opening 20 in a circular arc forming a slide.
- the opening 20 is concavity oriented downwards.
- the opening 20 is distant from the front and rear ends of the cover 13, 14.
- the opening 20 is distant from the upper and lower ends of the cover 13, 14.
- the opening 20 extends over approximately 60 ° of angle.
- the opening 20 is centered on a geometric point located in the cover 13, 14.
- the opening 20 has a substantially vertical front end.
- the opening 20 has a front end adjacent to the bottom 8 and the front end of the cover 13, 14.
- the opening 20 has a rear end adjacent to the upper edge 13 and the front end of the opening 19.
- the lower zone of the opening 19 is located vertically to the notch 15.
- the assistance device 1 is in the high position.
- the rear end of the plate 3 remains substantially at the same height as the top of the rear wall 11.
- the plate 3 is substantially horizontal.
- the front flap 4 is substantially vertical.
- the front flap 4 is in the retracted position.
- the front flap 4 is flush with the mouth of the frame 2.
- the lower end of the front flap 4 is in contact with or in the immediate vicinity of the front end of the bottom 8.
- the front flap 4 comprises small sides in contact or in the immediate vicinity the front end of the side walls 9, 10.
- the upper end of the front flap 4 is close to the front end of the plate 3.
- the upper end of the front flap 4 is articulated to the front end of the plate 3.
- the tray 3 may comprise a frame and an upper plate.
- the plate 3 is articulated about a horizontal axis adjacent to the rear wall 11 and located under the plate 3.
- the plate 3 comprises a substantially rectangular main surface with parallel elongated notches allowing the covers 13 and 14 to pass.
- the plate 3 comprises a flange 21 directed upwards.
- the flange 21 is peripheral to the main surface.
- the flange 21 has a constant of a few centimeters, for example 1 to 4 cm, allowing the plate 3 to receive a coating, for example stone slabs, a parquet, a laminate, a flexible synthetic coating, etc.
- the plate 3 may be made of steel sheet with a thickness of between 1 and 4 mm, preferably between 2 and 3.5 mm.
- Figure 3 shows the assistance device 1 in the absence of tray.
- the assistance device 1 is in the high position.
- the assistance device 1 comprises a drive unit 6 visible here.
- the drive assembly 6 may comprise a jack 61, a movable carriage 62 and a pair of arms 63.
- the jack 61 drives the movable carriage 62.
- the movable carriage 62 drives the arms 63.
- the jack 61 and the movable carriage 62 are arranged between the bottom 7 and the plate 3.
- the cylinder 61 is linear.
- the jack 61 is preferably electric. However, the mechanical jack variant manually operated, for example by crank, is possible.
- the cylinder 61 is parallel to the bottom
- the jack 61 is parallel to the side walls 9, 10.
- the jack 61 comprises a stationary end facing the rear of the frame and a movable end facing the front of the frame, i.e. the mouth.
- the stationary end of the cylinder 61 is fixed at the bottom
- the movable end of the jack 61 is fixed to the carriage 62, for example in the vicinity of the front edge of the carriage 62, for example in the vicinity of the front edge of the carriage 62.
- the cylinder 61 is controlled by a driver not shown.
- the pilot can be equipped with current sensing.
- the movable end of the jack 61 and the carriage 62 are movable in horizontal translation between a forward position, cf. FIGS. 3, 4 & 9, and a rear position, cf. FIGS. 5 to 8.
- the front position determines a high position of the plate 3
- the rear position determines a low position of the plate 3.
- the carriage 62 rests on slides 81 mounted on the bottom 8.
- the slides 81 are horizontal.
- the slides 81 are parallel.
- the slides are four in number. Embodiments with two or three slides are provided.
- the slides 81 may be in the form of a metal section with a smooth and hard sliding upper surface.
- the carriage 62 is provided with two runners by slide.
- the pads arranged under the carriage 62 are not visible.
- the pads can be made of synthetic material with a low coefficient of friction, for example based on PTFE.
- the carriage 62 has a generally rectangular shape.
- the length of the carriage 62 is oriented between the side walls 9, 10, parallel to the rear wall 11.
- the width of the carriage 62 is oriented parallel to the side walls 9, 10. The length is greater than the width.
- the carriage 62 comprises a cut sheet metal chassis and folded.
- the frame includes a rectangular bottom and longitudinal and lateral edges.
- the chassis of the trolley is made of sheet steel with a thickness of between 1 and 4 mm, preferably from 2 to 3.5 mm.
- the longitudinal and lateral edges are substantially vertical.
- the longitudinal and lateral edges are bent upwards.
- the longitudinal and lateral edges extend to a height of 1 to 4 centimeters.
- the rear longitudinal edge comprises an opening in which the cylinder 61 passes.
- the movable end of the jack 61 is fixed to the bottom of the frame 2 in the vicinity of the front longitudinal edge, ensuring stability of the carriage. Depending on the diameter of the jack, the opening can also extend in the bottom to reduce the overall height.
- the front longitudinal edge comprises a plurality of cutouts, here four, housing, in the lower position of the plate 3, sections forming beams in the underside of the plate 3.
- a cut is provided by profile.
- the front longitudinal edge comprises end regions adjacent lateral edges and can be supported on the side edges.
- the end regions form pushers 67 for the arms 63.
- the pushers 67 are here vertical.
- the carriage 62 is symmetrical with respect to a plane parallel to the side walls 9, 10.
- the frame 2 comprises at least one mechanical stop 82 limiting the stroke of the carriage, the arrival in abutment causing a current draw of the electric jack detected by the driver of the jack 61.
- four mechanical stops 82 are arranged on the bottom 8.
- Each mechanical stop 82 is mounted at the end of a slide 81, the front side, the other side back.
- the frame 2 comprises two pairs of plates 22, 23 vertical.
- Each plate 22, 23 is in the form of a rectangular flat piece, for example sheet metal.
- Each plate 22, 23 rests on the bottom 8 by a small side.
- Each plate 22, 23 is in contact with the rear wall 11 by a long side or edge.
- the plates 22, 23 may be welded to the bottom 8 and / or to the rear wall 11.
- a horizontal axis drilling is provided in an upper zone of each plate 22, 23.
- the frame 2 comprises a pivot axis segment 24 for each pair of plates 22, 23. Each end of a pivot axis segment 24 is projecting into the piercing of a plate.
- Each pivot pin segment 24 can be held in the bores by circlips, snap rings or internal teeth washers.
- Each pivot axis segment 24 is supported by a pair of plates.
- the pivot pin segments 24 are adjacent to the upper end of the rear wall 11.
- the pivot pin segments 24 are spaced apart to provide good stability.
- the plate 3 rests on the pivot pin segments 24.
- the plate 3 can be secured to the pivot pin segments 24 by flanges.
- the plate 3 is pivotally mounted relative to the frame 2. The pivoting takes place over a limited angle, for example less than 15 °, so that the distance between the rear end of the plate 3 and the rear wall 11 remains negligible. for example less than 3 mm.
- the arms 63 are symmetrical.
- the arms 63 are coaxial.
- Each arm 63 is disposed between the side wall 9, 10 and the cover 13, 14 neighbor.
- the arm is housed in one side of the frame 2.
- Each arm 63 is articulated on a pin 17 forming a tilting axis.
- the pin 17 is supported by the side wall 9, 10 and the cover 13, 14.
- the pin 17 is disposed in the upper region of the cover 13, 14.
- the pin 17 is disposed in the rear region of the hood 13, 14.
- the pins 17 are coaxial.
- the pins 17 are perpendicular to the side walls 9 and 10.
- the pins 17 are horizontal.
- Each arm 63 has a generally triangular shape or in a portion of a circle.
- Each arm 63 comprises a plane body 63a.
- the body 63a is made from a cut sheet blank. Avoid folding or stamping.
- the body 63a may be between 1 and 4 mm thick.
- the body 63a is articulated on the pin 17.
- the pin 17 is disposed near a vertex of the triangle, the base of the triangle being closer to the bottom 8. Said vertex has an angle of between 50 and 70 °.
- Each arm 63 comprises a first finger 65 receiving the thrust of the pusher 67 of the carriage.
- the first finger 65 comprises a base 65a and a pin 65b.
- the pin 65b passes through a hole in the body of the arm 63.
- the base 65a is welded to said body on the opposite side to the projection of the pin 65b.
- the base 65a has a solid disc shape.
- the base 65a has a thickness of between 1 and 3 mm.
- the pin 65b has a cylindrical shape of revolution.
- the pin 65b may include a bearing to reduce friction.
- the pin 65b may have a diameter of between 8 and 20 mm, preferably between 8 and 12 mm.
- the first finger 65 is disposed in the vicinity of a second vertex of the triangle.
- Each arm 63 comprises a second finger 66 supporting the plate 3 in the vicinity of its first end.
- the second finger 66 receives the thrust of the plate 3 and causes the pivoting of the plate 3.
- the second finger 66 comprises a base 66a and a pin 66b.
- the pin 66b passes through a hole in the body of the arm 63.
- the base 66a is welded to said body on the opposite side to the projection of the pin 66b.
- the base 66a has a solid disc shape.
- the base 66a has a thickness of between 1 and 3 mm.
- the pin 66b has a cylindrical shape of revolution.
- the pin 66b may include a bearing to reduce friction.
- the pin 66b may have a diameter of between 8 and 20 mm, preferably between 12 and 16 mm.
- the second finger 66 is disposed in the vicinity of a third vertex of the triangle.
- the angle between a line passing through the pin 17 and the pusher 67 of the carriage, corresponding to the contact surface of the first finger 65, and a straight line passing through the pin 17 and the contact surface of the second finger 66 with the plate 3 is between 50 and 70 °, preferably between 55 and 65 °.
- the ends of the pins 65b and 66b opposite the bases 65a and 66a are connected together by a spacer. The thickness of the body of the arms can be reduced.
- the first finger 65 and the second finger 66 are parallel axes.
- the first finger 65 and the second finger 66 pass through the opening 19.
- the first finger 65 and the second finger 66 project in the space between the bottom 8 and the plate 3.
- the first finger 65 and the second finger 65 The fingers 66 are arranged at different distances from the pins 17.
- An amplifier is thus formed.
- the distance pion 17 - first finger 65 is smaller than the distance pion 17 - second finger 66.
- the vertical stroke of the front end of the plate 3 is greater than the horizontal stroke of the cylinder, for example 4%.
- the opening 19 has a recess 31 substantially in the middle.
- the opening 19 comprises a first portion for the stroke of the first finger 65 and a second portion for the stroke of the second finger 66.
- the portions are contiguous forming a single opening.
- the first and second portions may be disjoint, hence two openings, for example for a higher amplifier effect.
- the first finger 65 is located at the rear end of the opening 19 and the second finger 66 is located at the rear end of the second portion in the vicinity of the recess 31.
- the first finger 65 and the second finger 66 are substantially at the same distance from the bottom 8.
- the first finger 65 is located at the front end of the first portion of the opening 19 in the vicinity of the recess 31 and the second finger 66 is located at the front end of the opening 19 in the vicinity of the edge upper cover 13, 14.
- the first finger 65 and the second finger 66 define a line inclined to the horizontal of about 50 to 70 °.
- the vertical stroke of the first finger 65 on the push button 67 of the carriage is weak. Thus the pusher 67 of the carriage may have a small vertical dimension.
- the straight line passing through the pin 17 and the point of contact between the second finger 66 and the plate 3 pivots at the same angle during the movement of the arm.
- the horizontal stroke of the second finger 66 on the plate 3 is small, of the order of 50% of the radius between the pin 17 and the contact surface of the second finger 66 with the plate 3.
- pivoting arms are replaced by sliding rods.
- the flap 4 is articulated on the front end of the plate 3.
- a hinge 46 of substantially horizontal axis is provided.
- the hinge 46 is fixed on the one hand to the flap 4 near an upper edge of said flap 4, and on the other hand, to the plate 3.
- the attachment 3 can be made to the flange 21.
- the assistance device 1 comprises a mechanism 40 for deploying the shutter 4.
- the mechanism 40 indexes the position of the shutter 4 on the position of the plate 3.
- the mechanism 40 closes the shutter 4 in the high position of the plate 3 and the deployment flap 4 in the low position of the plate 3.
- means “mechanism” a member without an electric actuator.
- the mechanism 40 may optionally be provided with a sensor. In the mode shown, the mechanism 40 is devoid of sensor.
- the mechanism 40 ensures an amplified displacement at the beginning of the descent of the plate 3. Indeed, a given vertical displacement of the front end of the plate 3 requires a vertical displacement at least equal to the lower edge of the flap 4 to avoid coming into contact with the ground too soon.
- the flap 4 being articulated at its upper edge, the required angular pivoting is high, the vertical displacement following a law H x (1-cos ⁇ , with ⁇ the flap angle relative to the vertical and H the flap height
- H x (1-cos ⁇ , with ⁇ the flap angle relative to the vertical
- H the flap height The mechanism 40 ensures a game at the end of the descent of the plate 3. In fact, it is desirable that the shutter 4 come into contact with the ground and be able to adapt to soils of different levels.
- the flap 4 is articulated at its upper edge, the required angular pivoting is small, the vertical displacement following the same law but ⁇ being close to 90 °.
- the mechanism 40 comprises a pair of symmetrical connecting rods 42, one connecting rod per side of the frame 2.
- Each connecting rod 42 is an elongated piece.
- Each rod 42 may be formed by a cut sheet blank and arranged in one or more thicknesses.
- Each connecting rod 42 comprises a front end hinged to the flap 4, a rear end slidably mounted relative to the plate 3 and a central portion slidably mounted relative to the frame 2.
- the front end of the connecting rod 42 is connected to a hinge 43 remote from the high edge and the low edge of said flap 4.
- the hinge 43 is mounted substantially midway between the top edge and the bottom edge of said flap 4. More generally, the hinge 43 is mounted between 1/3 and 2/3 of the height of the flap 4.
- the stroke of the rod 42 is less than the stroke of the bottom edge of the flap 4.
- the hinge 43 is disposed on the rear face of the flap 4, forming the lower face in the deployed position of the flap 4.
- the notch 15 of the cover 13, 14 forms a housing for the hinge 43 in the high position of the plate 3.
- the rear end of the rod 42 is connected to a first slider 44 slidably mounted in a linear slide 32 of the plate 3.
- the rod 42 can move in rotation and in translation relative to the plate 3.
- the translation travel is limited by the length of the linear slide 32.
- the linear slide 32 is substantially horizontal in the upper position of the plate 3.
- the linear slide 32 is parallel to the plate 3.
- the linear slide 32 comprises an elongate plate in which a rectilinear opening 33 is formed.
- the linear slide 32 may comprise a piece of U-folded sheet metal symmetric with respect to a central plane, each leg of the U being provided with a rectilinear opening 33.
- the bottom of the U is fixed to the plate 3 in the underside, for example by welding.
- Each branch of the U is directed down.
- Each branch of the U is parallel to the covers 13, 14.
- a chamfer 34 is formed in each branch of the U to allow reaching the low position of the tray shown in Figure 7.
- the lower edge of the U branches is likely
- Each slot 35 is formed between a U-leg and the bottom in the folding zone. Each slot 35 is of greater length than the length of the straight opening 33. Each slot 35 extends forward and backward of the rectilinear opening 33.
- the slots 35 favor the folding of the branches of the U from a sheet metal blank by reducing the risk of deformation in the vicinity of the rectilinear openings 33.
- said sheet is of the same thickness as the other main parts
- the slide 44 is in the form of a pin.
- the slider 44 comprises a base attached to the connecting rod 42, a cylindrical body of revolution disposed in the rectilinear aperture 33 and a head of diameter greater than the diameter of the body disposed on the side of the body opposite the connecting rod 42.
- the slider 44 may be symmetrical relative to the connecting rod and comprise two bodies and two heads to cooperate with the two straight openings 33.
- the body may be provided with a bearing so that the slider 44 rolls on the edges of the rectilinear openings 33
- the rear end of the connecting rod 42 is thus pivotable with respect to the plate 3.
- the rear end of the connecting rod 42 is translational sliding along the length of the rectilinear openings 33.
- the linear slideway 32 is located above the opening 20.
- the linear slide 32 is located between the opening 19 and the mouth of the frame 2.
- the central portion of the rod 42 is pivotally and slidably mounted relative to the frame 2.
- the opening 20 forms a slide for this purpose.
- a slider 45 is in the form of a pin.
- the slider 45 comprises a base attached to the connecting rod 42, a cylindrical body of revolution disposed in the opening 20 and a head of diameter greater than the diameter of the body disposed on the side of the body opposite to the connecting rod 42.
- the body may be provided with a bearing so that the slider 45 rolls on the edge of the opening 20.
- the central portion of the rod 42 is thus pivotable relative to the frame 2 and sliding in translation on the opening 20.
- the slide 45 is located at the upper end of the opening 20.
- the slide 44 is located substantially at the rear of the linear slide 32.
- the rod 42 has an angle of the order of 10 to 30 ° to the horizontal.
- the shutter 4 is closed, ie substantially vertical.
- the rear end of the rod 42 descends as well as the front end, the slide 45 to follow said descent is forced to move forwards in the opening 20 which leads to the connecting rod 42 forwards, in particular towards the front of the linear slide 32.
- the amplification of the horizontal movement of the rod 42 towards the front, at this stage, is obtained, in particular, by the inclination of the upper end of the opening 20.
- the amplification of the horizontal movement of the lower end of the flap 4 is also obtained by the positioning of the articulation on the shutter 4.
- the reciprocal applies at the end of the upward movement of the plate 3.
- the slider 45 is located at the lower end of the opening 20.
- the slider 44 is located substantially at the front of the linear slide 32.
- the connecting rod 42 is substantially horizontal.
- the flap 4 is open, i.e projecting forwardly from its lower end with an inclination depending on the configuration of the ground.
- the rear end of the rod 42 descends.
- the front end of the rod 42 descends more slowly because the pivoting of the flap 4 forward decreases the amplitude of this movement.
- the slide 45 is located towards the front end of the opening 20, on a portion close to the vertical. The horizontal movement of the rod 42 forward is reduced compared to the vertical movement of the plate 3.
- the flap maneuver is safe, reliable and easy while being driven by the maneuvering of the tray.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Auxiliary Methods And Devices For Loading And Unloading (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Pallets (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1561690A FR3044272B1 (fr) | 2015-12-01 | 2015-12-01 | Dispositif d'assistance au franchissement d'un obstacle par un vehicule |
PCT/FR2016/053150 WO2017093664A1 (fr) | 2015-12-01 | 2016-11-30 | Dispositif d'assistance au franchissement d'un obstacle par un vehicule |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3384103A1 true EP3384103A1 (fr) | 2018-10-10 |
EP3384103B1 EP3384103B1 (fr) | 2020-01-01 |
Family
ID=55135426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16813095.3A Active EP3384103B1 (fr) | 2015-12-01 | 2016-11-30 | Dispositif d'assistance au franchissement d'un obstacle par un véhicule |
Country Status (9)
Country | Link |
---|---|
US (1) | US10415254B2 (fr) |
EP (1) | EP3384103B1 (fr) |
CA (1) | CA3006889A1 (fr) |
DK (1) | DK3384103T3 (fr) |
ES (1) | ES2781210T3 (fr) |
FR (1) | FR3044272B1 (fr) |
PT (1) | PT3384103T (fr) |
WO (1) | WO2017093664A1 (fr) |
ZA (1) | ZA201804161B (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3116431B1 (fr) * | 2020-11-26 | 2023-02-10 | Mydl | Dispositif d’assistance au franchissement d’un obstacle |
DE202021102530U1 (de) | 2021-05-10 | 2021-07-07 | Janina Lysann Diecks | Rampe für ein Fahrzeug, insbesondere ein Fahrrad |
CN114607079B (zh) * | 2022-04-02 | 2023-06-27 | 中启胶建集团有限公司 | 一种建筑幕墙连接用拼合定位机构 |
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GB1294317A (en) * | 1969-07-04 | 1972-10-25 | Dermont Franklin Loblick | Dockboard lip raising mechanism |
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US3955827A (en) * | 1975-03-03 | 1976-05-11 | Wonigar Joseph J | Stowable step for vehicles |
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US6311352B1 (en) * | 1999-07-26 | 2001-11-06 | Rite-Hite Holding Corporation | Self-unlatching dock leveler lip with dampened descent |
IT1320406B1 (it) * | 2000-06-06 | 2003-11-26 | Bestgroup Srl | Dispositivo sollevatore a scomparsa per disabili su sedia a rotelle ecarrozzine per bambini. |
US6473926B2 (en) * | 2001-01-12 | 2002-11-05 | Overhead Door Corporation | Cross traffic legs for dock leveler |
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FR3020081B1 (fr) * | 2014-04-22 | 2016-05-06 | Myd L | Dispositif d'assistance au frachissement d'un obstacle par un vehicule |
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US9587404B1 (en) * | 2016-04-19 | 2017-03-07 | Lift-U, Division Of Hogan Mfg., Inc. | Operable ramp |
US9963883B1 (en) * | 2017-02-03 | 2018-05-08 | Lift-U, Division Of Hogan Mfg., Inc. | Operable ramp |
US9708815B1 (en) * | 2017-02-03 | 2017-07-18 | Lift-U, Division Of Hogan Mfg., Inc. | Operable ramp |
-
2015
- 2015-12-01 FR FR1561690A patent/FR3044272B1/fr active Active
-
2016
- 2016-11-30 ES ES16813095T patent/ES2781210T3/es active Active
- 2016-11-30 PT PT168130953T patent/PT3384103T/pt unknown
- 2016-11-30 US US15/780,261 patent/US10415254B2/en active Active
- 2016-11-30 DK DK16813095.3T patent/DK3384103T3/da active
- 2016-11-30 EP EP16813095.3A patent/EP3384103B1/fr active Active
- 2016-11-30 CA CA3006889A patent/CA3006889A1/fr active Pending
- 2016-11-30 WO PCT/FR2016/053150 patent/WO2017093664A1/fr active Application Filing
-
2018
- 2018-06-21 ZA ZA2018/04161A patent/ZA201804161B/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR3044272A1 (fr) | 2017-06-02 |
US20180347203A1 (en) | 2018-12-06 |
EP3384103B1 (fr) | 2020-01-01 |
FR3044272B1 (fr) | 2018-01-12 |
DK3384103T3 (da) | 2020-04-06 |
WO2017093664A1 (fr) | 2017-06-08 |
PT3384103T (pt) | 2020-04-06 |
CA3006889A1 (fr) | 2017-06-08 |
US10415254B2 (en) | 2019-09-17 |
ZA201804161B (en) | 2020-06-24 |
ES2781210T3 (es) | 2020-08-31 |
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