WO2020084561A1 - Systeme de pesage pour plate-forme de travail d'une nacelle elevatrice a mat - Google Patents
Systeme de pesage pour plate-forme de travail d'une nacelle elevatrice a mat Download PDFInfo
- Publication number
- WO2020084561A1 WO2020084561A1 PCT/IB2019/059125 IB2019059125W WO2020084561A1 WO 2020084561 A1 WO2020084561 A1 WO 2020084561A1 IB 2019059125 W IB2019059125 W IB 2019059125W WO 2020084561 A1 WO2020084561 A1 WO 2020084561A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- platform
- force sensors
- lifting
- working platform
- mast
- Prior art date
Links
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
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
-
- 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
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/08—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles
Definitions
- the present invention relates to the field of mobile elevating work platforms (also known by the acronym PEMP, or in English by mobile elevating work platforms and its abbreviation MEWP) also commonly called aerial work platforms (or aerial work platforms or its abbreviation A WP). It relates more particularly to the aerial work platforms which comprise a mast supporting the working platform of the aerial work platform.
- PEMP mobile elevating work platforms
- MEWP mobile elevating work platforms
- a WP aerial work platforms
- Lifting cradles are machines designed to allow one or more people to work at height.
- they include a work platform designed to receive people.
- the working platform is supported by a lifting structure which allows it to be raised from a lowered position on the chassis of the lifting platform to the desired working position in height.
- the lifting structure is often arranged on a turret which is pivotally mounted on the chassis, which allows the orientation of the lifting mechanism - and therefore of the platform - to be changed relative to the chassis.
- the chassis is generally equipped with wheels or tracks making it possible to move the lifting platform to the ground. It is most often motorized to allow an autonomous movement on the ground of the lifting platform.
- the work platform is usually equipped with a control station allowing an operator on board the platform to move it to reach the desired working position.
- Each model of lifting platform is designed to support a maximum load which should not be exceeded in order to avoid any risk of accidents, for example to prevent the lifting platform from tipping. Therefore, it is desirable to equip the lifting platform with a weighing system making it possible to determine the load on board the lifting platform in order to limit or prevent the lifting of the platform or the movement of the lifting platform at the ground. And contemporary normative developments make the presence of such a weighing system compulsory for certain categories of aerial work platforms and impose a certain degree of precision of the measurement carried out.
- a lifting platform with vertical mast is a lifting platform whose lifting structure comprises a vertical fixed mast which supports the working platform, that is to say that the mast extends vertically relative to the chassis without possibility of modifying its angle to the chassis.
- the mast is extendable vertically generally at by means of a plurality of boxes which interlock and slide between them in a vertical direction. They usually have a weight of between 800 and 1200 kg and a maximum lifting height of the order of 6 to 10 m.
- a first approach consists in supporting the working platform by means of four force sensors mounted on a rigid chassis and positioned near the angles of the working platform, the rigid chassis being supported by the lifting structure.
- This approach is illustrated for example by CN 106006504 A.
- a rigid chassis has a significant mass, which makes this solution unsuitable for light machines such as a lifting platform with vertical mast, in particular because of the increased risk of overturning.
- the railing is mounted directly on the rigid chassis so that the weighing system does not take into account the loads that may have been hung or placed by users on the railing.
- a weighing system is positioned laterally between the platform and the lifting structure. It comprises a mechanical device by means of which the lifting structure supports the working platform and with which a force sensor is associated.
- the mechanical device is designed to dissociate the weight of the working platform and the moments which result from the cantilevered positioning of the working platform so that the force sensor is subjected exclusively on the weight of the work platform and therefore only measure the latter.
- the mechanical device is heavy, which makes these weighing systems unsuitable for light machines such as a lifting platform with vertical mast, in particular because of the increased risk of pouring.
- the lateral placement of the weighing system between the lifting structure and the working platform is not easily adaptable to a lifting platform with vertical mast directly supporting the working platform because the vertical mast supports the work platform from below.
- the aim of the present invention is to provide a weighing technology for a lifting platform which is better suited to being used in lifting platforms with vertical masts, but which could possibly also be used for other types of lifting platforms.
- the present invention provides a lifting platform, comprising: - a work platform comprising a floor and a railing,
- an elevating structure for displacing the working platform in height comprising an extendable mast through which the working platform is supported, the elevating structure supporting the working platform only by one side of the work platform, and
- the force sensors are arranged in a fixed spatial relationship between them
- the force sensors are arranged so that, in orthogonal projection on a plane corresponding to the floor of the working platform, the force sensors are all located on the same side of a center line of the floor of the work platform which is the one located towards the side of the work platform by which it is supported by the lifting structure,
- each of the force sensors is designed to measure the force exerted on it only in the vertical direction by the work platform when the floor of the work platform extends horizontally.
- each of the force sensors is designed to measure the force exerted on it only in the direction perpendicular to the floor of the work platform.
- the working platform is therefore mounted cantilevered with respect to the lifting structure and the force sensors.
- the force sensors are therefore subject both to the weight of the working platform, including the load on board, as well as to the forces resulting from the moments which appear due to the cantilever mounting, unlike the first and second approaches of the prior art where the force sensor (s) are only subjected to weight.
- the force sensors are designed to measure the force exerted on them only in the vertical direction by the working platform when the floor of the working platform extends horizontally, the weight of the work platform including the load on board, is nevertheless easily determinable with satisfactory precision by performing the addition of algebraic measurements provided by the force sensors.
- the force sensors are interposed between the lifting structure and the work platform by being spatially distributed so as to be each subjected to their own force by the work platform.
- the invention is advantageous compared to the prior art for several reasons. Compared to the first approach of the prior art, the force sensors occupy a much smaller region which is situated on the side of the work platform by which it is supported. As a result, the force sensors can be supported by a smaller structure, and therefore also less heavy.
- the invention dispenses with using a heavy and bulky mechanical device to dissociate the weight of the work platform and the moments resulting from its cantilever mounting in order to subject the sensor to effort than weight.
- the invention comprises one or more of the following characteristics:
- the force sensors each have their own support interface for supporting the work platform or for being supported by the lifting structure, and each of the force sensors is provided for measuring the force exerted only in the vertical direction by the working platform on its support interface when the floor of the work platform extends horizontally or to measure the force exerted only in the vertical direction by its support interface on the lifting structure when the floor of the work platform extends horizontally; in particular, provision may be made for the force sensors each to have their own support interface for supporting the working platform, each of the force sensors being provided for measuring the force exerted only in the vertical direction by the work platform on its support interface when the floor of the work platform extends horizontally;
- the force sensors are distributed so that, in an orthogonal projection on a plane, the support interfaces occupy the vertices of a polygon;
- the lifting structure supports the work platform from the middle of one side of the work platform and the force sensors or the support interfaces of the force sensors are arranged symmetrically with respect to a plane median of the floor of the working platform which is perpendicular to said center line;
- each force sensor comprises a planar support surface, the planar support surfaces of the support interfaces of the force sensors being coplanar;
- each force sensor comprises a planar support surface extending parral element to the floor of the work platform or the support interface of each force sensor comprises a planar support surface extending perpendicular to the floor of the work platform;
- the force sensors are arranged under the floor or else, viewed in orthogonal projection on a plane corresponding to the floor of the work platform, the force sensors are arranged outside the floor;
- the force sensors are based on strain gauges arranged on or in a common test body, the support interface of each of these two sensors being part of the common test body;
- the common test body has the form of a bar comprising two opposite longitudinal ends, the support interface of one of the two force sensors being arranged in a region towards one of the longitudinal ends and the support interface the other of the two force sensors being arranged in a region towards the other longitudinal end;
- the support interfaces of the four force sensors are arranged, in orthogonal projection on a plane, along the vertices of a square, a rectangle or an isosceles trapezoid;
- two of the force sensors are based on strain gauges arranged on or in a first common test body in the form of a bar, the support interface of each of these two sensors forming part of the first test body, and the two other force sensors are based on strain gauges arranged on or in a second common test body distinct from the first test body, the support interfaces of each of these two other sensors being part of the second body d 'test;
- the extendable mast is a vertical fixed mast, the mast being extendable by means of a plurality of boxes which interlock and slide together in a vertical direction, the mast supporting the working platform by means of the upper box at which the work platform is rigidly mounted by means of force sensors;
- the upper part of the railing is in sliding contact against the vertical wall of the upper box to support the working platform;
- the upper box of the mast has supports projecting from at least two opposite sides of the box, the force sensors being fixed on said supports; the first test body is fixed on one of the supports and the second test body is fixed on the other support;
- the extendable mast is a vertical fixed mast, the mast being extendable by means of a plurality of boxes which interlock and slide together in a vertical direction, the mast supporting the working platform by means of the upper box, the lifting structure further comprising a pendulum arm, one end of which is articulated to the upper box of the vertical fixed mast and an opposite end supports the working platform; or the extendable mast is a mast that can be tilted relative to a frame supporting the lifting structure, the mast optionally comprising sections articulated between them.
- the lifting structure supports the working platform by a narrow side of the working platform
- the lifting platform also includes an electronic processing device to determine the load placed on the platform from the force measurements provided by the force sensors.
- FIG. 1 represents a view of a lifting platform with a vertical mast according to an embodiment of the invention, the vertical mast being extended to the maximum.
- Figure 2 shows another view of the lifting platform of Figure 1, the vertical mast being retracted to the maximum.
- FIG. 3 represents a detailed view of the weighing system of the lifting platform according to the first embodiment, which corresponds to the zone referenced III in FIG. 2.
- FIG. 4 shows one of the force sensors of the weighing system of the lifting platform of the first embodiment.
- FIG. 5 is a top view of the working platform of the lifting platform of the first embodiment, which shows the arrangement of the support interfaces of the load cells of the weighing system.
- FIG. 6 illustrates the forces measured by the force sensors for a loading case of the working platform of the lifting platform of the first embodiment.
- FIG. 7 represents a view similar to FIG. 3, but for a variant of the first embodiment in which the two force sensors share the same test body so as to form a double sensor.
- FIG. 8 represents a view of a double force sensor used in the variant of FIG. 7.
- FIG. 9 represents a view of the pendulum arm and of the working platform of a lifting platform according to a second embodiment in which the lifting structure comprises a pendulum arm mounted by one end at the upper end of the extendable mast and supporting at its other end the work platform.
- FIG. 10 represents an alternative mounting of the force sensors with respect to the mounting illustrated in FIG. 9.
- the lifting platform 1 is a lifting platform with a vertical fixed mast 20 forming the lifting structure of the lifting platform 1, it being understood that the mast 20 is effectively vertical when the lifting platform is placed on a flat horizontal ground.
- the mast 20 is extendable vertically by means of a plurality of boxes which interlock and slide between them in a vertical direction under the action of a multi-body cylinder.
- the lifting platform 1 comprises a chassis 10 on which the mast 20 is rigidly mounted, that is to say without the possibility of rotation relative to the chassis 10, nor the possibility of modifying its inclination relative to the chassis 10.
- the chassis 10 comprises wheels 11, 12 - or alternatively tracks - allowing the translation of the lifting platform 1 to the ground.
- the chassis 10 is preferably motorized to allow autonomous movement of the lifting platform 1 on the ground.
- the lifting platform 1 comprises a working platform 30 which is rigidly supported by the mast 20, that is to say without the possibility of displacement of the working platform 30 relative to the mast 20.
- the working platform 30 is rigidly mounted to the last box 21 of the vertical mast 20, that is to say the highest box when the mast 20 is extended.
- the working platform 30 includes a floor 31 and a railing 35.
- the floor 31 extends perpendicular to the mast 20, in other words the floor 31 is horizontal when the lifting platform 1 rests on a flat horizontal floor.
- the working platform 30 has a generally rectangular base plane - cf. Figure 5 - which corresponds substantially to the base plane of the chassis 10.
- the mast 20 supports the working platform 30 through the middle of a narrow side 36 of the latter which conventionally defines the rear side of the lifting platform 1.
- the box 21 is surrounded on either side and on the front side by the working platform 30, while the rear side of box 21 is substantially aligned with the rear side of the working platform 30.
- the lifting platform 1 is equipped with a weighing system for determining the load present on the working platform 30. It comprises four force sensors 41, 42, 43, 44 which are mounted between the box 21 and the platform -working platform 30 so as to fully support the weight of the working platform 30.
- the force sensors 41 to 44 are arranged in pairs on either side of the box 21.
- the force sensors 41, 42 are arranged on a first lateral side of the box 21 and the sensors force 43, 44 are arranged on a second lateral side of the box 21 opposite the first.
- a first horizontal support 22 is arranged projecting from the first lateral side of the box 21 for mounting the force sensors 41, 42. It can be a foundry piece attached to the box 21 for example by welding.
- the horizontal support 22 comprises an upper surface 23 on which the force sensors 41, 42 are fixed by any suitable means such as screws. The surface 23 is preferably machined to provide good positioning of the force sensors 41, 42.
- a second horizontal support - not visible in the figures - similar to the first is arranged on the second lateral side of the box 21 for mounting the force sensors 43, 44.
- the force sensors 41 to 44 are placed under the floor 31 of the work platform 30 so as to support the work platform 30 by its floor 31.
- Each of the force sensors 41, 42, 43, 44 has a respective support interface 4a, 42a, 43a, 44a by means of which they support the floor 31 of the work platform 30.
- it is a beam 32 of the structure forming the floor 31 which is fixed - by screws or any other appropriate means - to the support interfaces 4a, respectively 42a, of the force sensors 41, respectively 42.
- another beam - not visible - of the structure forming the floor 31 is fixed on the support interfaces 43a, respectively 44a, of the force sensors 43, respectively 44.
- the support interfaces 4la to 44a and more generally the force sensors 41 to 44 are arranged symmetrically with respect to a vertical median plane X of the floor 31 of the work platform 30: cf. Figure 5.
- Such an arrangement facilitates the installation of the force sensors 41 to 44 relative to the lifting structure and distributes favorably the forces exerted by the working platform on the support interfaces 4la to 44a of the sensors.
- force 41 to 44 taking into account the fact that the lifting structure supports the working platform 30 by the middle of one side of the latter through which the median plane X passes.
- This allows identical dimensioning of the force sensors 41 and 42 relative to the force sensors 43 and 44 which are arranged on either side of the median plane. This contributes also to improve the accuracy of the determination of the load carried out from the measurement of the force sensors 41 to 44.
- the force sensors 4la to 44a are all arranged on the side of the transverse center line Y of the floor 31 which is that located towards the narrow side 36 by which the mast 20 supports the working platform 30, that is to say to the left of the transverse center line Y of the floor 31 in FIG. 5. Consequently, the working platform 30 is therefore mounted cantilevered with respect to the force sensors 41 to 44 and their support interfaces 4la to 44a.
- the four support interfaces 4la, 42a, 43a, 44a are arranged, in orthogonal projection on the plane corresponding to the floor 31, according to the vertices of a rectangle, or even of a square, as is visible on FIG. 5.
- the positioning of the support interfaces 4la to 44a along the vertices of a rectangle or a square is convenient because of the rectangular cross section of the boxes of the mast 20, in particular the box 21 on both sides another of which the force sensors 41 to 44 are mounted.
- the support interfaces 4la to 44a can also be arranged at the vertices of a polygon other than a rectangle or square, for example those of an isosceles trapezoid.
- the working platform 30 is of the extendable type, that is to say that the floor 31 comprises a fixed part 3a which is rigidly mounted on the force sensors 41 to 44 and a sliding part 3 lb with respect to the fixed part 3 la so as to be able to vary the length of the working platform 30.
- the railing 35 comprises a fixed part mounted on the fixed part 3 the floor 31 and a sliding part 35b fixedly mounted on the sliding part 3 lb of the floor 31.
- transverse center line Y of the floor 31 is defined in the location where the sliding part 3 lb is retracted to the maximum, that is to say for which the length of the working platform 30 is minimal.
- the support interfaces 4la to 44a each comprise a flat surface parallel to the floor 31 - that is to say horizontal like the floor 31 - and are coplanar, which has the advantage of compactness and the simplicity of mounting the force sensors.
- the support interfaces can be located in different horizontal planes.
- Each of the force sensors 41 to 44 is capable of providing a measurement of the force exerted perpendicularly on the flat surface of its support interface 4la to 44a.
- the force sensors 41 to 44 are strain gauge sensors each comprising a respective test body in the form of a bar.
- the test body is generally subjected to bending for this type of sensor.
- An example configuration for the force sensor 42 is illustrated in FIG. 4.
- the support interface 42a on the upper side of the bar, comprises the horizontal flat surface already mentioned and a hole used to fix it on the horizontal flat surface the beam 32 of the floor 31 by means of a screw or a bolt.
- the bar has on its underside a surface forming a mounting interface 42b provided with two through holes, for positioning and fixing on the horizontal support 22 of the box 21.
- the force sensors 41, 43 and 44 can be identical to the force sensor 42.
- the force sensors are placed between the beam 32 of the floor 31 of the working platform 30 and the corresponding horizontal support 22 of the box 21 while lying horizontally therebetween.
- strain gauge sensors having a test body in the form of a bar is advantageous because this type of sensor is commonly available commercially and they are economical while providing good accuracy. In addition, they have a limited space in the transverse direction of the bar, which makes it possible to limit the increase in the level of the floor 31 relative to the chassis 10 in the lowered state of the working platform 30.
- the configuration of the horizontal supports 22 of the box 21 and of the beams of the floor structure 31 which are used for mounting the force sensors 41 to 44 advantageously allows direct mounting between them without the force sensors 41 to 44 in the case where it is not desired to equip the lifting platform 1 with a system for determining the load of the platform.
- This can in particular be envisaged in the case of a lifting platform 1 with a working platform 30 of small area which can for this reason escape the normative constraint of being provided with a weighing system.
- any other type of appropriate force sensor may be used such as compression sensors or sensors with an S-shaped test body, the latter being however more bulky, or even electromagnetic compensation sensors which are more expensive, however.
- the sensors 41 to 44 can be analog sensors, that is to say which do not include integrated electronics, or on the contrary digital sensors, that is to say which integrate into the test body a electronics for conditioning the signals of the measurement cell formed by the strain gauges. In both cases, the sensors include an electrical or other connection for outputting the measurement signals from the sensor to on-board electronics of the lifting platform 1.
- the on-board electronics of the lifting platform 1 calculates the load on board the working platform 31 from the sum of the algebraic measurements of the four force sensors 41 to 44 which corresponds substantially to the total weight of the platform. working form 30 loaded.
- each force sensor 41 to 44 measures only the force exerted on its support interface in the vertical direction as soon as the lifting platform is placed on substantially horizontal ground, which is the usual condition for using such a lifting platform.
- FIG. 6 An example of measurement is illustrated in FIG. 6 where the weight of the loaded working platform 30 is noted F and applies to the center of the floor 31. Due to the cantilever mounting of the working platform work 30, the force sensors 41, 43 on the one hand and the sensors 42, 44 on the other hand are biased in the opposite direction, ie in traction for the former and in compression for the latter.
- the force sensors 41, 43 are subjected together to a vertical force F 2 , each supporting half of the fact that the weight F is centered in this case.
- the force sensors 42, 44 are subjected together to a vertical force Fi which is oriented in the opposite direction of the force F 2 , each supporting half of it.
- the algebraic sum Fi + F2 corresponds substantially to the weight F in accordance with the laws of statics.
- the rear upper part 35c of the fixed part 35a of the railing 35 is in sliding contact against the box 21 so as to support the working platform 30, and therefore limit its bending due of its cantilever mounting.
- the sliding contact avoids disturbing the determination of the load of the working platform 30 from the measurements of the force sensors 41 to 44 since the force sensors 41 to 44 support substantially the entire weight of the platform working 30 loaded despite this sliding contact.
- the on-board electronics of the lifting platform 1 is provided in order to be able to carry out a calibration procedure so as to be able to determine the load on board the working platform 30. Then, in use, the on-board electronics can be designed to inhibit the lifting of the working platform 30 or limit the lifting speed of the latter depending on the amount of load on board the working platform 30 which it determines on the basis signals received from the force sensors 41 to 44. In particular, it can be provided to inhibit the lifting of the working platform 30 if the load exceeds a first predetermined threshold. It can be provided to limit the lifting speed of the working platform 30 if the load exceeds a second predetermined threshold lower than the first.
- a display can also be provided on the control console on board the working platform 30 which indicates the level of the load, for example in the form of a bargraph.
- FIG. 7 illustrates a variant of the first embodiment in which the force sensors 41, 42 have the same first test body in the form of a bar and the force sensors 43, 44 have the same second test body in the form of a bar separate from the first test body.
- the test body common to the force sensors 41, 42 is referenced 50 in FIG. 7, the other not being visible.
- FIG. 8 specifically illustrates the test body 50 of the force sensors 41, 42, it being specified that that of the force sensors 43, 44 is identical.
- the planar surface of the support interface 4la of the force sensor 41 is located in a region of a first longitudinal end of the upper face of the bar while the planar surface of the support interface 42a of the force sensor 42 is located in a region of a second longitudinal end of the upper face of the bar, the second longitudinal end being opposite the first longitudinal end.
- the bar has a surface forming a mounting interface 51 on the underside of the bar for mounting the bar on the horizontal support 22 of the box 21.
- the bar also has holes for fixing to the beam 32 of the floor 31 of the working platform 30 and the horizontal support 22 of the box 21 of the mast 20.
- FIG. 9 illustrates a second embodiment in which the lifting platform is a lifting platform with a telescopic mast.
- the mast may also include sections hinged together around a horizontal axis so as to be able to fold and unfold.
- the lifting platform comprises a pendulum arm 120 which is articulated by one end 120a at the upper end of the mast, not shown.
- the other end of the pendulum arm 120 supports a working platform 131 from the middle of a long side of the working platform 130 through a weighing system which is similar to the first embodiment. Only the force sensors 41, 42 are visible in FIG. 9.
- the force sensors are placed not under the floor 131, but, seen in orthogonal projection on a plane corresponding to the floor 131 of the working platform 130, outside the floor 131.
- each lateral pair of force sensors is mounted on a common beam or a respective beam supporting the floor 131 and which extends out of the floor 131 from the side towards the pendulum arm 120.
- the support interfaces of the force sensors can be placed, seen in orthogonal projection on a plane corresponding to the floor 131, at the vertices of a rectangle or of a square as in the first embodiment.
- each lateral pair of force sensors is placed on a respective beam extending at an angle with respect to the long side of the floor 131 instead of perpendicularly, and symmetrically with respect to each other, then a placement of the support interfaces at the vertices of an isosceles trapezoid in correspondence with the direction of extension of these two beams is advantageous from the point of view of the simplicity of mounting the force sensors on these beams. Except for what has just been mentioned, all the rest of the description made of the first embodiment is applicable to the second embodiment.
- FIG. 10 illustrates a third embodiment which differs from the second embodiment of FIG. 9 only by the mounting of the force sensors 41 to 44.
- the bars of the force sensors 41 to 44 extend perpendicularly to the floor 131 instead of parallel to it as was the case in the first embodiment and in FIG. 9.
- the flat surfaces of the support interfaces of the sensors 41 to 44 extend perpendicular to the floor 131 instead of parallel to it.
- the bars of the force sensors 41 to 44, as well as the flat surfaces of their support interfaces extend vertically instead of horizontally.
- the fact of placing the bars perpendicular to the floor 131 of the working platform 130 advantageously provides a gain in palce between the work platform 130 and the end of the pendulum arm 120 which supports it.
- FIGS. 9 and 10 are susceptible of numerous variants.
- it may be a lifting platform with a telescopic mast tilting relative to the chassis of the lifting platform, but which does not have a pendulum arm 120.
- the working platform 130 is supported directly by the 'upper end of the telescopic mast by means of force sensors.
- the lifting platform is a lifting platform with a vertical fixed mast.
- the vertical fixed mast is extendable by means of a plurality of boxes which interlock and slide between them in a vertical direction and the mast supports the working platform by means of the box superior.
- the lifting structure further comprises the pendulum arm 120, one end of which is articulated to the upper box of the vertical fixed mast and an opposite end supports the working platform 130.
- each pair of force sensors share the same test body as in the case of the variant of FIGS. 7 and 8 described for the first embodiment.
- the sensors 42, 44 can be replaced by a single force sensor placed between a horizontal support arranged at the front of the box 21 and a beam of the structure forming the floor 31 of the work platform 30.
- a similar approach can be envisaged for the two other embodiments.
- it can also be envisaged to use more than four force sensors.
- the use of four force sensors is preferred in terms of cost and quality of maintaining the work platform.
- the support interfaces 4la to 44a of the force sensors 41 to 44 are used to support the work platform while the mounting interfaces 42b or 50 are used for mounting the sensor d 'effort on the lifting structure, their role can be reversed.
- the own support interface serves to support the sensor concerned by the lifting structure while its mounting interface 42b or 50 serves to mounting of the force sensor to the work platform.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3116509A CA3116509A1 (fr) | 2018-10-26 | 2019-10-24 | Systeme de pesage pour plate-forme de travail d'une nacelle elevatrice a mat |
AU2019363868A AU2019363868A1 (en) | 2018-10-26 | 2019-10-24 | Weighing system for a working platform of an aerial lift having a mast |
US17/286,941 US20210354967A1 (en) | 2018-10-26 | 2019-10-24 | Weighing system for a working platform of an aerial lift having a mast |
EP19798133.5A EP3870531A1 (fr) | 2018-10-26 | 2019-10-24 | Systeme de pesage pour plate-forme de travail d'une nacelle elevatrice a mat |
CN201980072854.1A CN112969658B (zh) | 2018-10-26 | 2019-10-24 | 用于具有桅杆的高空作业平台的作业平台的称重系统 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1859975 | 2018-10-26 | ||
FR1859975A FR3087762A1 (fr) | 2018-10-26 | 2018-10-26 | Systeme de pesage pour plate-forme de travail d’une nacelle elevatrice a mat |
FR1860021A FR3087761B1 (fr) | 2018-10-26 | 2018-10-29 | Systeme de pesage pour plate-forme de travail d’une nacelle elevatrice a mat |
FR1860021 | 2018-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020084561A1 true WO2020084561A1 (fr) | 2020-04-30 |
Family
ID=68461807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2019/059125 WO2020084561A1 (fr) | 2018-10-26 | 2019-10-24 | Systeme de pesage pour plate-forme de travail d'une nacelle elevatrice a mat |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2020084561A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116675161A (zh) * | 2023-07-04 | 2023-09-01 | 湖北瑞雅特汽车有限公司 | 一种具有防护气囊的液压升降式高空作业车 |
CN116675161B (zh) * | 2023-07-04 | 2024-05-31 | 湖北瑞雅特汽车有限公司 | 一种具有防护气囊的液压升降式高空作业车 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999011557A1 (fr) * | 1997-09-02 | 1999-03-11 | Crown Equipment Corporation | Capot de moteur pour vehicule auxiliaire d'atelier |
FR2808791A1 (fr) * | 2000-05-11 | 2001-11-16 | Pinguely Haulotte | Structure telescopique et nacelle elevatrice equipee d'une telle structure |
EP1382562B1 (fr) | 2002-07-19 | 2005-05-11 | MOBA - Mobile Automation AG | Dispositif de détermination de charge |
CN106006504A (zh) | 2016-07-08 | 2016-10-12 | 美通重工有限公司 | 分体式平台栏装置 |
CN106430020A (zh) | 2016-09-14 | 2017-02-22 | 浙江鼎力机械股份有限公司 | 过载保护装置、系统及高空作业平台 |
WO2017177219A1 (fr) | 2016-04-08 | 2017-10-12 | Jlg Industries, Inc. | Système de détection de charge de plateforme |
-
2019
- 2019-10-24 WO PCT/IB2019/059125 patent/WO2020084561A1/fr unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999011557A1 (fr) * | 1997-09-02 | 1999-03-11 | Crown Equipment Corporation | Capot de moteur pour vehicule auxiliaire d'atelier |
FR2808791A1 (fr) * | 2000-05-11 | 2001-11-16 | Pinguely Haulotte | Structure telescopique et nacelle elevatrice equipee d'une telle structure |
EP1382562B1 (fr) | 2002-07-19 | 2005-05-11 | MOBA - Mobile Automation AG | Dispositif de détermination de charge |
WO2017177219A1 (fr) | 2016-04-08 | 2017-10-12 | Jlg Industries, Inc. | Système de détection de charge de plateforme |
CN106006504A (zh) | 2016-07-08 | 2016-10-12 | 美通重工有限公司 | 分体式平台栏装置 |
CN106430020A (zh) | 2016-09-14 | 2017-02-22 | 浙江鼎力机械股份有限公司 | 过载保护装置、系统及高空作业平台 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116675161A (zh) * | 2023-07-04 | 2023-09-01 | 湖北瑞雅特汽车有限公司 | 一种具有防护气囊的液压升降式高空作业车 |
CN116675161B (zh) * | 2023-07-04 | 2024-05-31 | 湖北瑞雅特汽车有限公司 | 一种具有防护气囊的液压升降式高空作业车 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BE1023064A9 (fr) | Dispositif de mise à l'horizontale | |
EP3870531A1 (fr) | Systeme de pesage pour plate-forme de travail d'une nacelle elevatrice a mat | |
WO1987004140A1 (fr) | Dispositif de transfert de chargement, en particulier pour le transfert rapide de charges palettisees | |
FR3000200A1 (fr) | Mecanisme de pesee pour une nacelle et nacelle elevatrice comprenant un tel mecanisme de pesee | |
CA3002784A1 (fr) | Systeme et methode de manutention pour faciliter la maintenance d'une unite de couchage, en particulier un lit medicalise | |
FR2885611A1 (fr) | Etabli elevateur | |
WO2020084561A1 (fr) | Systeme de pesage pour plate-forme de travail d'une nacelle elevatrice a mat | |
FR2956107A1 (fr) | Vehicule elevateur pour le positionnement d'une charge en hauteur | |
FR2652072A1 (fr) | Dispositif pour le deplacxement d'un objet parallelement a la courbure et a proximite d'une surface a profil variable. | |
EP0705072A1 (fr) | Table d'examen echocardiographique | |
EP3599339B1 (fr) | Dispositif d'acces a la partie superieure d'un vehicule de type camion citerne | |
WO2021130209A1 (fr) | Nacelle élévatrice à ciseaux et procédé de détermination de la stabilité d'une telle nacelle | |
FR2809686A1 (fr) | Dispositif d'articulation et de centrage de bennes de camion | |
BE1023064B1 (fr) | Dispositif de mise à l'horizontale | |
FR2553731A1 (fr) | Dispositif pour le transport par etapes de charges lourdes | |
EP4056242B1 (fr) | Equipement pour la pratique du basketball | |
EP3822147B1 (fr) | Système mécanique de mise à niveau automatique pour véhicule à bras | |
EP0273813A1 (fr) | Dispositif de support et de mesure d'une charge | |
WO2022157449A1 (fr) | Ensemble et procédé d'alignement automatique de rails | |
FR2968076A1 (fr) | Remorque equipee d’un systeme de pesee embarque | |
FR2711520A1 (fr) | Lit médicalisé modulaire à pesée intégrée. | |
BE1009924A6 (fr) | Dispositif pour mesurer le poids d'une personne. | |
FR2832488A1 (fr) | Support reglable pour tacheometre | |
FR2852691A1 (fr) | Equipement de pesage adaptable sur un engin de manutention ou un tracteur agricole | |
WO2005082571A1 (fr) | Presentoir tournant a plateaux basculants |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19798133 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 3116509 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2019363868 Country of ref document: AU Date of ref document: 20191024 Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2019798133 Country of ref document: EP Effective date: 20210526 |