• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    System (23) for fixing a wheel (22) retractable to a post (4) of a step (1) to allow movement of the step by means of a wheel, the fastening system comprising an arm ( 24) and a fitting means, the arm being intended on the one hand to receive the retractable caster, and on the other hand to be secured to the interlocking means, the interlocking means being intended to make the arm integral with the amount at a predefined height of the ground, the interlocking means comprising a first wall in contact with the upright, the interlocking means comprising a second wall distinct from the first wall, the upright being taken between the first wall and the second wall; wall, so as to prevent any movement of the amount between the first wall and the second wall.
    公开号:FR3066223A1
    申请号:FR1754057
    申请日:2017-05-09
    公开日:2018-11-16
    发明作者:Patrice Lefeuvre；Christophe Aubry
    申请人:CDH Group SAS；
    IPC主号:
    专利说明:

    SYSTEM FOR FIXING A STEP-DOWN WHEELCHAIR, AND A STEPBOARD COMPRISING AT LEAST ONE
    RETRACTABLE CASTER SYSTEM
    The invention relates to the field of running boards such as individual rolling platforms (PIR), individual lightweight rolling platforms (PIRL), respectively meeting standards NF-P 93-352 and NF-P 93-353.
    More particularly, the invention relates to systems for fixing retractable rollers of such running boards.
    A step conventionally comprises a front plane having two uprights, connected at least by one step, as well as a rear plane provided with two uprights, connected by at least one bar. The rear plane is mounted in articulation relative to the front plane. The steps of the PIR type also include a floor, mounted between the front plane and the rear plane, to allow an operator to work at height without fatigue, his two feet lying flat on the floor.
    The handling of such a step is sometimes not easy, in particular to move it from one place to another. Indeed, such an action involves folding the step, carrying it and unfolding it again, the whole process can be tedious, especially if it is carried out multiple times.
    For this reason, for a movement over a very short distance (for example less than a few meters), the user is tempted to move the unfolded step, either by lifting it up and resting it at the desired location, or else by sliding it on its uprights.
    Due to a lack of ergonomic grip, volume and significant weight, such displacement can cause musculoskeletal disorders for the user.
    In addition, such movement of the step can generate a risk of tilting, which can have serious material and human consequences.
    In order to overcome these drawbacks, it is known to provide a step with several retractable rollers, that is to say able to move either in a retracted position or in an extended position.
    When the rollers are out, a user can move the unfolded step by a simple horizontal mechanical action: the step is then considered to be in a so-called displacement configuration. When the rollers are retracted, the step rests on the ground only on the ends of its uprights, which are generally fitted with non-slip pads. An adhesion effect is obtained, preventing movement of the step on the ground, a user can then move on the steps and work on the step in a completely secure manner. The running board is then in a so-called working configuration.
    [0009] The retractable rollers of the running boards are usually arranged on the running board in three different ways.
    In a first type of layout, described for example in documents US 4063616 (Gutierrez), or US 5791434 (Emerson Electric), the rollers are arranged together on a mobile frame, and are actuated simultaneously from a single control, for example a pedal, which allows the movable frame to be moved from a high position to a low position, and vice versa.
    In a second type of layout, in particular disclosed in documents FR 3005986 (CDH), or FR 3007449 (CDH), rollers arranged in the vicinity of the rear plane are each actuable independently of one another, and rollers arranged in the vicinity of the front plane are linked together by train, so that their retraction can be carried out simultaneously.
    Finally, there is a third type of configuration, where all the rollers are independent, and are actuated individually from each other, as for example described in document US 4166516 (Equipment Company Of America), or in document FR 3036423 (CDH).
    The use of running boards fitted with rollers, all mounted independently of one another, offers in particular the advantage of a simplified and compact structure, compared to the other types of installation of rollers, which makes it possible to lighten the step, while freeing up space under the floor.
    However, the assembly of independent casters requires fixing in the vicinity of the end of the uprights, generally involving the use of assembly means by screws, generally inserted within additional holes provided for this purpose on the amount. The drilling of such holes weakens the uprights, and can constitute a risk of initiation of rupture of the structure of the step.
    To solve this problem, document US 5653306 (Werner) proposes to use support angles, between the uprights and a crosspiece disposed between two uprights, so as to set up rollers.
    Such angles are bulky, however, in particular those arranged within the rear plane of the step. This drawback is amplified by the fact that each angle rests on a cross member disposed between two uprights, close to the ground. Consequently, the user does not have the possibility of stepping over the rear plane above an obstacle such as for example a sanitary bowl. In such a situation, the user of a step fitted with such rollers is obliged to bypass the obstacle. However, it is often encountered situations, in particular in the context of use for carrying out finishing works, where space is limited, preventing the circumvention of the obstacle.
    Finally, although the angle is previously existing on the running board, the fact remains that its assembly still requires drilling the amount.
    Finally, a large number of existing running boards are not equipped with angles, and therefore can not be provided with such retractable casters.
    The invention aims in particular to solve the aforementioned drawbacks.
    A first object of the invention is to provide a retractable caster attachment system, capable of allowing the attachment of a caster to a step amount, without damaging the amount, and without causing any modification of the structure of the steps.
    A second object of the invention is to provide such a fixing system, having a reduced size.
    A third object of the invention is to provide such a fastening system, easily mountable.
    A fourth object of the invention is to provide a step comprising four retractable casters, each of them being fixed to an upright by means of a retractable caster fastening system, as presented above. .
    To this end, it is proposed, firstly, a system for fixing a retractable caster to an amount of a step, to allow movement of the step by means of a caster, the system of fixing comprising an arm and a fitting means, the arm being intended on the one hand to receive the retractable caster, and on the other hand to be secured by means of fitting, the fitting means being intended to make the arm with the upright at a predefined height from the ground, the interlocking means comprising a first wall in contact with the upright, the interlocking means comprising a second wall separate from the first wall, the upright being caught between the first wall and the second wall, so as to prevent any movement of the upright between the first wall and the second wall.
    Various additional characteristics can be provided, alone or in combination: the fitting means comprises a clamping means in connection with the two walls, the clamping means exerting an effort aimed at modifying the distance separating the first wall from the second wall, so as to prevent the fastening system from sliding, when the fastening system is subjected to a predefined load; the clamping means comprises at least one clamping screw which passes through holes arranged on the first wall and the second wall; the fitting means comprises a third wall, distinct from the first wall and from the second wall, the third wall being intended to come into contact with an upright, so that the fitting means partially frames the upright; the first wall, the second wall and the third wall are interconnected, so that the fitting means has a U-shaped cross section.
    It is proposed, secondly, a step comprising two planes, each formed of two uprights, the plans being hinged together, the uprights of at least one plane each include a retractable caster, the retractable caster being fixed on an amount by means of a fixing system of a retractable caster as presented above.
    Various additional characteristics can be provided, alone or in combination: the arm of at least one fixing system extends longitudinally between the uprights of the same plane; a plane comprises a crosspiece connecting the uprights together, a fixing system comprises a support surface capable of coming to bear against the crosspiece; the shape of the support surface is complementary to the lower surface of the crosspiece intended to come into contact with the support surface; a cross-member is a step arranged on a plane of the step, the step being intended for the ascent of a user on the step; a plane comprises an arch, the arch being fixed beforehand to two uprights of the same plane by means of fixing means passing through each of the uprights, the fixing means being configured to allow a stop of the fixing system to each of the respective amounts; the fixing means comprises a fixing screw arranged in slots arranged in the upright, the fixing screw successively passing through the first wall, an upright, the arch, and the second wall; each step of the step includes a fastening system as presented above; the step includes a front plane, and a rear plane, the retractable rollers intended to be fixed on the uprights of the front plane are arranged so as to belong to a longitudinal plane different from that where the retractable rollers of the rear plane are arranged, so that the folding of the step is carried out without creating collisions between the retractable casters arranged on the front plane with the retractable casters arranged on the rear plane.
    Other features and advantages of the invention will appear more clearly and concretely, on reading the following description of embodiments, given by way of nonlimiting examples, which is made with reference to attached drawings in which: FIG. 1 represents a simplified perspective view of a running board, the running board being provided with two retractable caster fastening systems, represented according to a first alternative embodiment, and two retractable caster fastening systems, represented according to a second alternative embodiment; FIG. 2 represents a simplified side view of a step comprising four retractable caster attachment systems, the step being in the displacement configuration; FIG. 3 represents a simplified side view of a step comprising four retractable caster fastening systems, the step being in working configuration; FIG. 4 represents a simplified perspective view of part of a front plane provided with a step, and of a retractable caster fixing system, illustrated according to a first variant embodiment; FIG. 5 represents a simplified sectional view of part of a front plane provided with a step, and of a retractable caster fixing system, illustrated according to a first variant embodiment; FIG. 6 represents a simplified perspective view of a retractable caster fastening system, represented according to a first alternative embodiment; FIG. 7 represents a simplified perspective view of a retractable caster fastening system, illustrated according to a second embodiment, the retractable caster fastening system being illustrated mounted on a running board upright, the running board upright being equipped with '' a wheel support arch; FIG. 8 represents a simplified view in section of a retractable caster fixing system, illustrated according to a second embodiment, the retractable caster fixing system being illustrated mounted on a running board upright, the running board upright being equipped with '' a wheel support arch; FIG. 9 represents a simplified perspective view of a retractable caster fastening system, according to a second alternative embodiment.
    Figure 1 shows a step 1, intended to allow work at height.
    In the example illustrated, the step 1 is of the individual rolling platform type.
    According to the embodiments shown, the step 1 comprises a front plane 2, and a rear plane 3. The two planes 2, 3 are inclined, and articulated between them. The articulation between the planes 2, 3 offers the possibility of folding them one over the other, which facilitates transport and allows compact storage of the step 1.
    According to the embodiments shown, each of the planes 2, 3 comprises two uprights 4, interconnected by at least one cross member.
    As illustrated in Figures 1 to 4, a cross member disposed on the front plane 2 is a step 5. The step 1 includes four steps 5, but according to embodiments not shown, the step 1 includes a number lower (e.g. one, two or three) or higher (e.g. five or six) of steps 5.
    According to the embodiments shown, the uprights 4 are made from metal profiles (for example steel or aluminum alloy), which have for example a rectangular section. In the vicinity of the lower ends 6, the uprights 4 are provided with non-slip pads 7.
    An orthogonal coordinate system XYZ is defined with respect to the running board, comprising three perpendicular axes two by two, namely: an X axis, defining a longitudinal, horizontal direction, coincident with a general direction of extension of the step; a Y axis, defining a transverse, horizontal direction, which with the X axis defines a horizontal XY plane; a Z axis, defining a vertical direction, perpendicular to the horizontal XY plane.
    In the following description, and in relation to the reference defined above, the terms "longitudinal" or "longitudinally" refer to a direction coincident with the X axis, the terms "transverse" or "transversely" refer to a direction coincident with the Y axis, and the terms "vertical" or "vertically" refer to a direction coincident with the Z axis. Terms of absolute position, such as "front", "rear", "up", "down", "left", "right", or relative like "above", "upper", "below", "lower" are defined relative to the direction of climb of a user on the step 1. The positive direction of the Z axis is defined by going in the direction of the rise of a user on the step 1.
    As illustrated in Figures 1 and 4, the step 5 is formed of a profile, in particular extruded aluminum alloy. The step 5 thus has a grooved upper surface 8 favoring the attachment of the user's shoes. Opposite the upper surface 8, the step 5 comprises a lower surface 9, substantially turned towards the ground.
    As illustrated in Figures 1, 2 and 3, a cross member disposed on the rear plane 3 is a bar 10. According to the embodiment of the step shown in Figure 1, the rear plane 3 comprises two bars 10. These bars 10 are in this case with a square section, but this section could be circular or even oval. The number of bars 10 varies depending on the height of the step 1.
    When the step 1 is unfolded (configuration illustrated in all the figures), the rear plane 3 forms an angle with the front plane 2, large enough to allow stability for the step 1. The lower ends 6 of the uprights 4 together form a laying plane P (in dotted lines in FIG. 2) for the step 1, corresponding to an ideally flat floor on which the step 1 would rest.
    The rear plane 3 is mounted articulated with respect to the front plane 2 via the upper ends 11 of the uprights 4 forming the rear plane 3, here shorter than the uprights 4 forming the front plane 2.
    As shown in Figure 1, the step includes an upper part 12, provided with a floor 13, a shelf 14 and a railing 15. According to the embodiment shown, the floor 13 s extends between the planes 2, 3, in the unfolded configuration of the step 1, so as to allow a user to work stably on the floor 13. An exemplary embodiment of an upper part 12 of a step 1 is described in detail in patent FR 3007449 in the name of the applicant.
    A plane 2, 3 comprises an additional device 16, previously made integral with an upright 4, by means of fixing means comprising a fixing screw 18 passing through the upright and the additional device 16.
    According to embodiments, not shown, the additional device 16 is a reinforcing device, for example for strengthening the fixing of sleepers on the uprights.
    According to the embodiment shown, the additional device 16 comprises a hoop 17 disposed on the rear plane 3. The arch 17 is made integral with the rear plane 3, thanks to fixing means, comprising in particular a screw 18 for fixing passing through lights 19 arranged in each of the uprights 4 of the rear plane 3. In order to allow the movement of the step 1 in the folded configuration, rolling members 20 are arranged on the lower part 21 of the arch 17. In this way, by positioning the step 1 on its rear plane 3, then by grasping it for example by means of its upper part 12, it is possible to roll it on its rolling members 20.
    In order to allow the mobility of the step 1 in the unfolded and empty configuration, that is to say when no user is located on the floor 13 or on the steps 5, the step 1 is provided with rollers 22 retractable. Throughout the following description, it is understood by "caster", a retractable caster 22. At least one plane 2, 3 is equipped with a pair of rollers 22, moving between a retracted position, where the rollers 22 are tangent to the laying plane P (Figure 3), and a deployed position, where the rollers 22 rear extend at least partially below the laying plane P (Figure 2).
    According to the embodiments shown, the uprights 4 of the front plane 2, just like the uprights 4 of the rear plane 3 are provided with rollers 22, which facilitates the movement of the step 1.
    Commonly to the embodiments illustrated in Figures 1 to 4 and 7-8, each caster 22 is mounted on an upright 4 by means of a fixing system 23, which comprises an arm 24, and a means 25 of nesting.
    In what follows, we are particularly interested in the structure of a caster 22, a fixing system 23, and their interactions with a step 1 such as that described above. According to the embodiments shown, a caster 22 comprises at least one wheel 26, pivotally mounted within a yoke 27, and a support shaft 28, which extends for example in extension of the yoke 27 according to a substantially vertical direction. The wheel 26 and the yoke 27 are shown in a position in which they extend substantially perpendicular to the rear plane 3, but are in fact pivotable around the support shaft 28, in order to allow the circulation of the step 1 in all directions. The movement of the step 1 with respect to the ground thus takes place in a plane-to-plane movement.
    The support shaft 28 allows the fitting of the caster 22 within an opening 29, advantageously arranged vertically in the arm 24, favorably in the vicinity of a free end 30 of the arm 24. In this way , sufficient clearance is left to the roller 22 to allow it to move in all directions, without colliding with the upright 4.
    The caster 22 is kept deployed by means of a return element, in this case a helical spring (not shown in the figures) disposed on the support shaft 28. The coil spring is in place inside the arm 24 and around the pivoting axis 28, and is intended to exert a force downwards, pushing the wheel 22 towards the ground. According to variant embodiments not shown, the return element is a deformable plate, or a spiral spring.
    An adjustment of the spring, and of the predefined height for fixing a caster 22 on the upright 4 is carried out so that: in the absence of additional mass on the step 1, (and in particular when no user is placed on the floor 13), the wheel 26 protrudes from the laying plane P downwards under the action of the spring, as illustrated in FIG. 2; if a mass exceeding a predetermined threshold is placed on the step 1 in the unfolded configuration substantially vertical to its center of gravity (typically a user placed on the floor 13), the spring is compressed to the point that the wheel 26 of the caster 22 either tangent to the laying plane P above it, as illustrated in FIG. 3.
    As shown in the figures, the arm 24 is made integral with the fitting means 25, and extends projecting from the fitting means 25, advantageously longitudinally between the uprights 4 of the same plane 2, 3. In this way, the external dimensions of the step 1 are not affected.
    According to the embodiments shown in all of the figures, the arm 24 is a profile having a rectangular section, offering in particular the advantage of being easily weldable on the interlocking means 25, which makes manufacturing of the simple fixing system 23, inexpensive and easily achievable in series. Advantageously, a cap (not shown) is disposed on the free end 30 of the arm 24, so as to protect from dust and impurities inside the arm 24.
    As shown in Figures 5, 6 and 8, 9, the fitting means 25 comprises a first wall 31, and a second wall 32, separate from each other, that is to say not confused. The first wall 31 is distant from the second wall 32 so that the upright is located between them. In other words, the upright 4 is sandwiched between the first wall 31 and the second wall 32, so as to allow the fastening of the system 23 for attachment to the upright 4. The first wall 31 and the second wall 32 are arranged in such a way at least limit the movement between the fitting means 25 and the upright 4, despite the force exerted by the spring on the fixing system 23.
    According to the embodiments shown, the first wall 31 and the second wall 32 exert a clamping force on the amount 4, the force having repercussions on the amount 4, in particular on its outer faces 33. The fixing system 23 is thus kept stationary at a predefined height by tightening in particular relative to the upright 4.
    According to the embodiments shown, the first wall 31 and the second wall 32 of the fitting means 25 are opposite one another, and advantageously extend on planes parallel to the outer faces 33 of the upright 4. In this way, the pressure exerted by the first and second walls 31, 32 are perpendicular to the outer faces 33, which makes it possible to obtain better retention of the means 25 for fitting onto the upright 4.
    Advantageously, the fitting means 25 comprises a substantially coplanar contact surface 34 with an outer face 33 of the upright 4. Advantageously, the contact surface 34 of the first wall 31 is in contact with an outer face 33 of the upright 4. In this way, the clamping force of the first wall 31 has a direct impact on the upright 4, an adhesion effort is obtained between the fitting means 25 and the upright 4.
    The clamping between the first and second walls 31, 32, and the amount 4 is for example carried out by providing the fitting means 25 with a clamping means 35 exerting a force aimed at varying the distance between the first wall 31 and the second wall 32. According to the embodiments shown, the bringing together of the first wall 31 and the second wall 32 causes a clamping force on the first wall 31 and the second wall 32 relative to the upright 4. It is thus prevented any sliding of the fixing system 23 relative to the upright 4, when the step 1 is subjected to a predefined load. Such a load is for example defined to correspond to the maximum load admissible by step 1.
    According to the embodiments shown, the first wall 31 and the second wall 32 each include an ear 36 for applying the clamping means 35 to exert its clamping force. The ears 36 are each opposite one another, so that it can be used by a clamping means 35. The first wall 31 and the second wall 32 are thus interconnected without the clamping means 35 colliding with the upright 4.
    In other words, the tightening is carried out at a distance from the upright 4, which avoids degrading it.
    Advantageously, the first wall 31 and the second wall 32 have transverse dimensions greater than the transverse dimensions of the upright 4, so that the ears 36 can extend beyond the upright 4, when the means 25 of socket is positioned on the upright 4.
    According to the embodiments shown, the clamping means 35 is for example an assembly comprising at least one clamping screw 37 and a clamping nut 38. The clamping screw 37 crossing the first wall 31 and the second wall 32 through holes 39 provided for this purpose, for example in the ears 36, acts on the distance separating the first wall 31 from the second wall 32.
    According to the embodiments shown in Figures 4-6, several clamping means 35, in this case several clamping screws 37 coupled to clamping nuts 38 are provided, so as to distribute the clamping force at several points of the fitting means 25. In addition, such an arrangement makes it possible to offer the fixing system 23 a redundancy of the clamping means 35 so that the rupture of a clamping means 35 does not lead to the unhooking of the system 23 for fixing the upright 4. In addition , tightening is easily achieved by the simple use of a screwdriver and / or a wrench compatible with the tightening nut 38, and therefore does not require any specific tool.
    Advantageously, the clamping means 35 comprises a ring 40 for adjusting the force, capable of coming into abutment with the respective contact surfaces 34 of the first wall 31 and of the second wall 32. In this way, the adjustment of the clamping force, for example by rotation of the clamping screw 37, can be adapted according to the load to be supported by the step 1. Such a ring 40 also acts as a polarizer, because it ensures a identical tightening for all the uprights 4 of the step 1. An insufficient tightening is thus directly visible during mounting. The mounting of the fixing system 23 on the uprights 4 of the step 1 is thus facilitated and secure.
    The ring 40 is also able to come into contact with an outer face 33 of the upright 4, so as to contribute to the blocking of the means 25 for fitting onto the upright 4.
    Advantageously, the fitting means 25 comprises a third wall 41, distinct from the first wall 31 and the second wall 32. The third wall 41 is disposed between the first wall 31 and the second wall 32, and partially frames the amount 4. The first, second and third walls 31, 32, 41 are advantageously connected together. The fitting means 25 then has a U-shaped cross section, which facilitates obtaining it.
    As shown in the figures, the third wall 41 comes into contact with an outer face 33 of the upright 4, offering the possibility by means of interlocking 25 to come astride the upright 4, which makes it possible to remove a degree of freedom between the fitting means 25 and the upright 4. The mounting between the upright 4 and the fitting means 25 is reinforced.
    The fitting means 25 is advantageously in one piece, for example obtained from a profile or a cut and stamped plate. Manufacturing is thus simplified, economical and achievable in large series. In addition, the mounting of a one-piece fitting means 25 facilitates its attachment to the upright 4.
    Advantageously, the interlocking means 25 has a shape complementary to the section of the upright 4. The interlocking means 25 surrounds or at least partially surrounds the upright 4, which makes it easier to position the means 25 d 'fitting on the upright 4, the fitting means 25 matching at least partially the upright 4. In this way, the fixing system 23 has an increased compactness, while guaranteeing an easier and safer positioning.
    According to the embodiments shown, the interlocking means 25 comprises a stop means 42, in order to promote the joining together of the interlocking means 25 on the upright 4.
    As shown for example in Figure 4, the stop means 42 is for example arranged so as to stop the force exerted upwards created by the rollers on the fixing system 23. In this way, the clamping force of the first wall 31 and of the second wall 32 can be minimized, because the stop means 42 also takes up part of the loads exerted by the rollers 22. By minimizing the clamping force , the risk of deterioration of the amounts 4 is reduced. In addition, the stop means offers redundancy as regards the blocking of the system 23 for fixing to the upright 4.
    In Figure 4, corresponding to a first alternative embodiment, the contact surface 34 of the second wall 32 comes into contact with an outer face 33 of the upright 4. In this way, a clamping force is applied directly on the upright 4. Such an arrangement is advantageous because it makes it possible to control the adhesion force, by increasing the contact surface 34 between the upright 4 and the contact surface 34 of the second wall 32. The first wall 31 and the second wall 32 allow the fitting means 25 to exert a mechanical grip action which opposes the mechanical actions exerted by the arm 24 on the fitting means 25. According to the first alternative embodiment of the fixing system 23, shown in Figures 4 and 5, a stop means 42 is inter alia made by means of a support surface 43, adapted to come into abutment against a cross member such that a step, previously arranged on the step 1. The stop means 42 makes it possible to position the fixing system 23 on the step 1, during the mounting of the rollers 22, thus fixing the distance between the rollers and the plane P of pose.
    Advantageously, the support surface 43 has a geometry complementary to the geometry of the lower surface 9 of the cross member, that is to say according to the first alternative embodiment, of the step 5. The effort support applied by the stop means 42 on the step 5 is thus distributed over all of the contact points between the support surface 43 and the lower surface 9. The risk of stress concentration is thus limited, which promotes the security of the attachment, and prevents any damage to the lower surface 9 or the support surface 43.
    Referring to Figures 8, and 9, corresponding to a second alternative embodiment of the fixing system 23, the fitting means 25 comprises a first port 44 disposed on the first wall 31 and a second port 45 on the second wall 32, advantageously opposite one another. The orifices 44, 45 are arranged so as to be an extension of the lights 19, previously present on the upright 4. In this way, no additional drilling is necessary, since the lights are already mounted on a step without wheels.
    As shown in Figures 1, 7 and 8, the lights 19 are provided so as to attach a part to the upright 4, such as for example a hoop 17 in order to position the wheels 26 on the rear plane 3 of the step 1 .
    According to the second alternative embodiment, the first wall 31 and the second wall 32 surround the upright 4 and the arch 17, so that the first wall 31 is in contact with an external face 33 of the upright 4, and the second wall 32 in contact with the hoop 17. The fixing screws 18 are then used so as to form a means 42 for stopping the means 25 for interlocking with the upright 4 and the hoop. In other words, the fixing screws 18 respectively pass through the first wall 31, the upright 4, the arch 17 and the second wall 32. Such an assembly avoids any additional intervention on the upright 4, thus avoiding its degradation.
    As illustrated in Figures 8 and 9, the fitting means 25 has a positioning surface 46, which promotes the proper positioning of the fitting means 25 on the upright 4. The mounting of the fixing system 23 is thus facilitated, and its immobility favored.
    Advantageously, the fitting means 25 comprises a fourth wall 47, arranged for example between the positioning surface 46 and the second wall 32, and the fourth wall 47 comes into contact with the hoop 17. The fourth wall 47 allows good positioning of the fitting means 25 on the arch 17, which facilitates mounting.
    We now describe a configuration of installation of the rollers 22 on the step 1.
    As shown in Figure 1, the step 1 includes two rollers 22 advantageously secured to the front plane 2 by fixing systems 23 according to the first embodiment, via a step 5. The step also includes two other rollers 22, which are fixed on the rear plane 3, thanks to the arch 17.
    Such a configuration makes it possible to take advantage of elements already present on a non-movable step 1, the installation of rollers 22 not implying any modification of the original structure of the step. In addition, the use of a fastening system 23 not using sleepers for the rear plane 3 is advantageous, because it avoids the establishment of sleepers in the vicinity of the ground, in particular preserving the passage above a toilet bowl.
    When a step includes four casters, each fixed to an upright 4 by means of a fastening system 23, the arms 24 of the fastening systems 23 arranged on the uprights 4 of the front plane 2 have a different dimension of the arms 24 of the fixing systems 23 arranged on the rear plane 3. The rollers 22 of the front 2 plane are then arranged so that they are not on the same plane as the rollers of the rear 3 plane. In this way, the folding of the step 1 does not cause a risk of collision between the rollers 22 of the front plane 2 and the rollers 22 of the rear plane 3. Advantageously, the dimension of the arms 24 of the fixing systems 23 are reduced to their strict minimum, in order to leave as much space as possible between the arms 24. This space can then be used so that the rear plane 3 can pass to the -above an obstacle, for example a toilet bowl, and allow intervention without discomfort.
    We describe an example of operation of the step 1 by a user.
    Going up on the front plane 2 of the step 1, the user exerts a load on the step 1, having the effect of causing a retraction of the rollers 22 arranged on the front plane 2, which are immediately positioned at the plane P pose. In this way, the step 1 can no longer move, and the continuation of the rise of the user is secure.
    The progression of the user on the steps 5 has the effect of causing a displacement of the mass of the user towards the rear plane 3, causing the driving of the rollers of the rear plane 3, until the rear 3 plane rests on the non-slip pads 7 corresponding to the laying plane P (the non-slip pads 7 are not shown in the sectional views in FIGS. 5 and 8, in order to lighten the drawing). The step 1 is thus in the working position.
    When the user is not present on the step 1, the rollers 22 of the rear plane 3 are deployed and the step 1 rests, at the rear plane 3, on the ground by its rollers 22, the plane P being then raised above the ground, as can be seen in Figure 2. In such a configuration, the step 1 being at each of its lower ends 6 provided with a roller 22, is easily movable from one place to another. other.
    The fixing system 23 has in particular the following advantages: ease of manufacture, thanks to simple parts, which can be produced without a machining operation; ease of assembly, which does not require specific tools, and can be carried out by a single person; adaptability to several types of steps 1; possibility of installation on existing steps 1.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. System (23) for fixing a retractable caster (22) to an upright (4) of a running board (1), to allow movement of the running board (1) by means of a caster (22) , the fixing system (23) comprising an arm (24) and a fitting means (25), the arm (24) being intended on the one hand to receive the retractable caster (22), and on the other hand to be secured to the means (25) of engagement, the means (25) of engagement being intended to make the arm (24) integral with the upright (4) at a predefined height from the ground, the means (25) of engagement comprising a first wall (31) in contact with the upright (4), the fixing system (23) being characterized in that the fitting means (25) comprises a second wall (32) distinct from the first wall (31 ), the upright (4) being taken between the first wall (31) and the second wall (32), so as to prevent any movement of the upright (4) between the first wall (31) and the two th wall (32).
    [2" id="c-fr-0002]
    2. Step (1) comprising two planes (2, 3), each formed by two uprights (4), the planes (2, 3) being articulated together, the uprights (4) of at least one plane (2, 3) each comprise a retractable caster (22), the step (1) being characterized in that the retractable caster (22) is fixed to an upright (4) by means of a system (23) for fixing a retractable caster (22) according to claim 1.
    [3" id="c-fr-0003]
    3. Step (1) according to claim 2, characterized in that a plane (2, 3) comprises a crosspiece (5) connecting the uprights (4) together, a system (23) for fixing comprises a surface (43 ) of support capable of coming to bear against the cross-member (5).
    [4" id="c-fr-0004]
    4. Step (1) according to claim 3, characterized in that the shape of the support surface (43) is complementary to the surface (9) of the lower crosspiece intended to come into contact with the support surface (43) .
    [5" id="c-fr-0005]
    5. Step (1) according to the preceding claim, characterized in that the arm (24) of at least one fixing system (23) extends longitudinally between the uprights (4) of the same plane (2, 3 ).
    [6" id="c-fr-0006]
    6. Step (1) according to one of claims 3 to 5, characterized in that a crosspiece (5) is a step arranged on a plane (2, 3) of the step (1), the step being intended for the user mounted on the step (1).
    [7" id="c-fr-0007]
    7. Step (1) according to any one of claims 2 to 6, characterized in that a plane (2, 3) comprises a hoop (17), the hoop (17) being previously fixed to two uprights ( 4) of the same plane (2, 3) by means of fixing means (18) passing through each of the uprights (4), the fixing means (18) being configured to allow the system to be stopped (23 ) of attachment to each of the respective uprights (4).
    [8" id="c-fr-0008]
    8. Step (1) according to the preceding claim, characterized in that the fixing means (18) comprises a fixing screw arranged in slots (19) arranged in the upright (4), the fixing screw successively passing through the first wall (31), an upright (4), the arch (17), and the second wall (32).
    [9" id="c-fr-0009]
    9. Running board (1) according to any one of claims from 2 to 8, characterized in that each upright (4) of the running board (1) comprises a fixing system (23) according to claim 1.
    [10" id="c-fr-0010]
    10. Running board (1) according to the preceding claim, characterized in that it comprises a plane (2) before, and a plane (3) rear, the retractable rollers (22) intended to be fixed on the uprights (4) of the front plane are arranged so as to belong to a longitudinal plane different from that where the retractable rollers (22) of the rear plane (3) are arranged, so that a folding of the step (1) is carried out without creating a collision between the retractable rollers (22) arranged on the front plane (2) with the retractable rollers (22) arranged on the rear plane (3).
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3066223B1|2019-06-14|RETRACTABLE FOOTBOARD FASTENING SYSTEM, AND FOOTBOARD COMPRISING AT LEAST ONE RETRACTABLE CASTER FIXING SYSTEM
    EP2818625B1|2015-11-04|Step with retractable wheels with control by railing
    WO2016170255A1|2016-10-27|Anti-pothole aerial work platform
    EP1418151B1|2006-12-06|Chassis with devices for articulations for outriggers
    FR3023571A1|2016-01-15|JOINT SYSTEM FOR A PORTILLON FOR A HEIGHT ACCESS DEVICE
    FR3018536A1|2015-09-18|WORKING PLATFORM IN TILT CONVERTIBLE ENCORBELLEMENT AND USE
    FR2666553A1|1992-03-13|Trolley equipped with a part for receiving goods which is connected to a slide which can be moved in terms of height, and guide device for this slide
    EP2583653A1|2013-04-24|Hospital bed with removable trolley
    EP1931295B1|2013-10-09|Folding wheelchair chassis and folding wheelchair
    FR2903874A1|2008-01-25|FURNITURE ELEMENT FORMING OFFICE AND CONVERTIBLE BED
    WO2014177465A1|2014-11-06|Frame for a shoring tower, comprising a built-in guard rail
    FR3004480A1|2014-10-17|WORKABLE FOLDING STRUCTURE INTEGRATING INTEGRATING A DEVICE FOR AIDING THE FOLDING OF AN AWNING
    EP2450017B1|2013-06-19|Bed assembly method
    EP2011698B1|2011-10-19|Retractable anti-underrun device
    EP3780997B1|2022-03-09|Retractable seat for a perched position
    EP3792143A1|2021-03-17|Wheelbarrow provided with a pivoting gripping assembly
    EP0065492A2|1982-11-24|Foldable stepladder
    WO2019180654A1|2019-09-26|Device for helping the transition from a seated position to a standing position, and vice versa, mobility platform for seat comprising such a device, and wheelchair
    CA2637639C|2012-10-02|Movable base for reducing lateral bucket cylinder pressure
    FR3066686B1|2019-06-07|SQUARE SUPPORT DEVICE AND MANUAL WORKSTATION EQUIPPED WITH SAME
    FR2947849A1|2011-01-14|Support leg for e.g. rapid scaffold, in building site, has blocking system occupying sliding position in which teeth are at distance from tubes and blocking position in which teeth are supported against one tube
    FR2927832A1|2009-08-28|Movable support device e.g. movable workbench, for e.g. vehicle, has fixation units defining base in beam forming portion lower end to receive vehicle wheel, and platform comprising upper surface with sufficient dimensions to form workbench
    EP2253562A1|2010-11-24|Device for transporting prefabricated flat objects.
    FR2884814A1|2006-10-27|Lifting apparatus e.g. jack, for vehicle, has rack rail with head placed on point of chassis of vehicle to be raised, where vehicle raises support arm whose rotation is stopped against stop fixed on base by advancing and reverse movements
    EP1005809B1|2003-05-02|Stable, laterally deployable assembly of the kind of a desk or a table
    同族专利:
    公开号 | 公开日
    FR3066223B1|2019-06-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2320407A|1942-02-28|1943-06-01|Bell Telephone Labor Inc|Retractile wheel assembly|
    US3446309A|1966-06-01|1969-05-27|Ralph D Davis|Roller mount for ladders|
    AU2014100476A4|2014-05-08|2014-06-19|Werner Co|Castor brace for step ladder|
    US20160348436A1|2015-05-28|2016-12-01|Eutimio Reyes|Mobile Ladder Support Assembly|US10808459B2|2017-04-13|2020-10-20|Wing Enterprises, Incorporated|Braces for ladders, ladders incorporating same and related methods|
    FR3111940A1|2020-06-29|2021-12-31|Cdh Group|GATE LEAF FOR WORK PLATFORM AT HEIGHT AND WORK PLATFORM INCLUDING SUCH A GATE LEAF|
    EP3940189A1|2020-07-15|2022-01-19|CDH Group|Device for working at height with articulated railing and automatic gate|
    FR3113695A1|2020-08-27|2022-03-04|Cdh Group|DEVICE FOR WORKING AT HEIGHT WITH ARTICULATED GUARDRAIL AND MEANS OF MAINTAINING IN FOLDED POSITION|
    法律状态:
    2018-05-15| PLFP| Fee payment|Year of fee payment: 2 |
    2018-11-16| PLSC| Search report ready|Effective date: 20181116 |
    2019-05-20| PLFP| Fee payment|Year of fee payment: 3 |
    2020-05-19| PLFP| Fee payment|Year of fee payment: 4 |
    2021-05-17| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1754057|2017-05-09|
    FR1754057A|FR3066223B1|2017-05-09|2017-05-09|RETRACTABLE FOOTBOARD FASTENING SYSTEM, AND FOOTBOARD COMPRISING AT LEAST ONE RETRACTABLE CASTER FIXING SYSTEM|FR1754057A| FR3066223B1|2017-05-09|2017-05-09|RETRACTABLE FOOTBOARD FASTENING SYSTEM, AND FOOTBOARD COMPRISING AT LEAST ONE RETRACTABLE CASTER FIXING SYSTEM|
    [返回顶部]