• 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:

    公开号:SE0900540A1
    申请号:SE0900540
    申请日:2009-04-23
    公开日:2010-10-24
    发明作者:Goeran Svensson
    申请人:Goeran Svensson；
    IPC主号:
    专利说明:

    SUMMARY OF THE INVENTION The object of the present invention is to remedy the above-mentioned problems by means of a simple, manageable and flexible step support, acting both as a level compensator and support width, which can be mounted on virtually all ladders regardless of make, both at the lower end of the steps , as a step stabilizer against the ground and in its upper part, as a step stabilizer against a wall. The step support is also intended to be part of various systems for improved and safer work ergonomics from the ladder.
    The step support consists of a crossbeam in the ends of which there are at least two support legs, which are rotatably attached to the crossbeam and can be folded into a compact unit for storage, but also easily folded out and fixed to a stable step support, by the support legs stepping against the crossbar's sloping outer ends . The crossbeam is attached to the side beams of the steps by means of at least one, preferably two fastening devices, which can be moved laterally along the crossbeam and thus grip different step widths. The attachment to the crossbeam can be done from two sides perpendicular to each other, which gives a great advantage in that the step support can be mounted at the lower end of the steps as a step stabilizer against ground, but also rotated 90 ° and mounted in the upper part of the steps as a step stabilizer against wall. Each support leg has an attached, articulated sleeve to the crossbeam in whose rectangular cavity a square support leg tube is telescopically slidably mounted. In the space between the rectangular inner contour of the sleeve and the square outer contour of the support leg, there is a self-inhibiting locking jaw, which allows the support leg to be pulled out to the desired length but prevents it from being accidentally pushed back. A knob deactivates the locking function and makes it possible to freely adjust the leg length. This means that the step support can be quickly and easily adjusted completely steplessly according to the ground level variation. Similar locking jaws can also be used in other systems to, for example, make a work table height-adjustable and level compensate for irregularities in the floor surface. By mounting a leveling level in the crossbeam of the step support, it is possible to easily and safely set up the steps in optimal inclination against the wall (15 °) and substantially vertically laterally. 10 15 20 25 30 When the step support is mounted as a step stabilizer against a wall in the upper part of the steps, it is possible to provide the step support with a safety frame, mounted on the cross beam and a standing plane, which is also mounted on the cross beam. The work platform thus created provides a restful, horizontal standing surface and with the safety frame's close contact with the back end, a personal safety is obtained that has never before been possible when working from a ladder. Because the support legs can be adjusted within a large area, the position of the work platform from the wall can be selected with respect to the work to be performed. One can e.g. easily place the platform outside a roof ledge when clearing the gutters. This is a great advantage.
    The outrigger tube can be a standardized square tube of aluminum, which can be easily replaced and specially adapted with different outrigger solutions. A variant, which gives a completely new property when working with a ladder, is a support wheel, which is mounted on a shaft perpendicularly drilled into the support leg tube. By, via clamping of the axle, locking the wheel disc against fixed friction pads, a dumb attachment of the wheel is obtained, which then functions as a fixed support foot. When the shaft tension is released, e.g. via a screw knob, the step support with ladder and work platform has a transport function, which makes it easy to move the step equipment from place to place, without having to lower the steps. From a management point of view, this is a great advantage.
    By mounting two step supports on two ladders and connecting the ladders with two cross struts, mounted opposite each other to a geometry-locked unit, the frame is formed into a simple, functional position for one person. A couple of ordinary scaffolding planks create the platform and a couple of aluminum pipes are used as handrail beams. The scaffold thus created is easy to assemble, easy to level in uneven terrain, in that all the support legs are individual, steplessly adjustable and the scaffold is easy to use by one person. By providing one step support with wheeled support leg tubes, as previously described, and the other step support with shackle handles, the entire stand can be easily moved and handled by one person. 10 15 20 25 The step support, with its innovative thinking in function, flexibility and simplicity in operation, is the cornerstone of the invention which provides an opportunity for new thinking in terms of ergonomics and safety when working from a ladder.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail below with reference to the exemplary embodiments shown in the drawings.
    Figure 1 shows an isometric view of the step support mounted as a step stabilizer against the ground.
    Figure 2 shows an isometric view of the step support mounted as a step stabilizer against a wall.
    Figure 3 shows a front view of the front of the step support mounted as a step stabilizer against the ground.
    Figure 4 shows a front view of the back of the step support mounted as a step stabilizer against the ground with the support legs in a steplessly adjusted position.
    Figure 5 shows the design and assembly of the locking jaw in a sectioned support leg.
    Figure 6 shows the same view of the locking jaw and the force balance for unloaded support leg.
    Figure 7 shows the same view of the locking jaw and the force balance for loaded support legs.
    Figure 8 shows a plan view of the step support seen from the back of the step support mounted in the upper part of the steps, as a step stabilizer against the wall.
    Figure 9 shows a plan view of the step support seen from the front of the step support mounted in the upper part of the steps, as a step stabilizer against wall corners and with the support legs fixed in an inwardly inclined position.
    Figure 10 shows a plan view of the step support with the support legs recessed in the folded position.
    Figure 1 1 shows a perspective view of the step support mounted as a step stabilizer against a wall and with a safety arch and standing plane mounted as a work platform.
    Figure 12 shows a perspective view of a step support with a ladder on which a slope support is mounted for free installation thereof.
    Figure 13 shows a perspective view of a step set, based on two step supports, which are assembled together into a scaffolding system. 10 15 20 25 30 DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Figure 1 shows an isometric view of the step support 1, mounted on the step 100 as a step stabilizer against the ground and with the cross member tube 1 1 and one fixed leg attached part 41 showing transparent components. Figure 2 shows an isometric view of the step support 1 mounted on the step 100 as a step stabilizer against the wall. Figure 3 shows a front view of the step support 1, seen from the front, with half the cross-beam tube 11 and one fixed leg 41 attached to the support leg to better show the components included. Figure 4 shows a front view of the step support 1, seen from behind with the support legs steplessly adjusted to compensate for inclined ground level.
    The description below relates mainly to Figures 1, 2, 3 and 4 unless otherwise stated. The step support 1 consists of a cross beam 10, two fastening devices 20 for fastening cross beam 10 to side beams 101, two coupling elements 30 between cross beam and respective support legs, two support legs 40 and two locking jaws 50. In the embodiment shown, the step support is symmetrically built, which is to prefer. Thus, the two support legs 40 with their locking jaws 50 are the same. Likewise, the coupling elements 30 and the fastening devices 20 are the same.
    The cross member 10 consists of a rectangular square tube 11, e.g. in aluminum, the ends 12 of which are cut at the same angle as the support legs 40 must be in the extended position. The square tube 1 1 of the crossbeam has two milled-out slots 13 in the rear and two identical slots in the lower edge at a 90 ° angle to the previously mentioned, which makes it possible to arrange the fastening devices 20 in two directions. In each end of the cross beam 11 there are suitably through-going mounting holes 14 for mounting accessories.
    The fastening device 20 consists of a nut block 21, preferably made of some construction polymer, with two threaded holes 22, possibly thread-reinforced, oriented 90 ° towards each other, so that they are directed towards the slots 13 in the square tube 1 1.
    The nut block 21 is floatably mounted inside the square tube 11 by means of a sliding fit and can thus be slid back and forth in the tube. The beam grip 24 is designed as a clamping grip which can grip over the side beam 101 of the steps. Through the beam grip 24 there is a hole through which the fastening screw 23 runs, to then enter through the slot 13 of the crossbeam and screw into the nut block 21. 20 easily moved sideways along the crossbeam and grip ladders of different widths. The screw 23 is suitably provided with a grip-friendly knob, which makes it possible to handle the fastening device without tools. When the fasteners 20 are fitted from the rear of the crossbeam 10, the step support can be mounted as a step stabilizer against the ground, see figure 1. When the fasteners 20 are fitted at the bottom of the crossbeam 10, the step support can be mounted as a step stabilizer against wall, see figure 2. When the step support 1 is mounted as a step stabilizer against the ground, see figure 1, it is suitable that the fastening beam 24 is mounted so that the step pin 102 rests against them and when the step support 1 is mounted as a step stabilizer against the wall, see figure 2, it is suitable that the fastening beam 24 is mounted so that these rest on the step pin 102. This eliminates any risk of possible slipping in the fastening grip.
    The coupling elements 30, at each end of the cross beam 10, have the task of securely connecting it to the support legs 40 and making them rotatable from a folded position, see figure 10, to a fully folded position, see figure 8, and any desired positions in between , see figure 9. Each coupling element 30 consists of two plates 31, e.g. in aluminum, which is fixedly mounted by means of, for example, rivets or welds to the opposite side of the square tube 11 of the crossbeam near its ends. The plates 31 protrude beyond the ends of the crossbeam and also on its lower side. In this way the plates form a free space, in which the support leg 40 can be mounted and guided. In the lower outer corner of the plates a continuous shaft 32 can be arranged, around which the support leg 40 can rotate. In the fully extended position of the support legs 40, these support the cut ends 12 of the crossbeam and assume the same angle as these, which ensures a stable, play-free joint function when the step support is loaded. Suitably, the ends 12 of the crossbeam are cut so that the support legs 40 in their extended position ensure a good support function. As an example, it can be mentioned that the angle between the cross member and the support legs should be over 90 ° to load and remove play in joints and less than 120 ° so as not to have too high bending moments in the support legs. A ladder is recommended to have a slope of 75 ° towards the ground level to provide a safe, non-slip step. Based on this knowledge, the angle between the cross beam 10 and the support legs 40 in the embodiment shown has been chosen to be 105 °, which corresponds to 75 ° to the ground plane. To ensure the position of the support legs in other desired cases, it is convenient to provide the coupling function 30 with a locking function.
    This can be done by means of through holes in the plates 31, which match the corresponding through holes in the support leg 40 for the respective desired support leg position. The reading can be done with a locking pin or even better with a screw 33, with a grip-friendly knob and where the receiving mounting plate has threaded mounting holes.
    The mounting plates 31 can be provided with through-going mounting holes 34, which fit over the corresponding holes 14 in the crossbeam 10 for mounting accessories.
    The two support legs 40 each consist of a fixed part 41 and an extendable part 42, and a support foot 43. The fixed part 41 is advantageously made of the same rectangular square tube as the mounting beam 11. The extendable part 42 consists of a square square tube, of e.g. aluminum, adapted for a telescopic sliding mounting inside the fixed part 41. A longitudinal cavity is formed between the rectangular cavity of the fixed part 41 and the square outer shape of the extendable part 42. This cavity is used, as previously described, to mount the coupling to the cross member 10, through a through shaft 32 and through holes for locking screw 33. the part 42 to be drawn steplessly to the desired position, but prevents it from being inadvertently pushed back. At the lower end of the extendable part 42 a support foot 43 is mounted. The support foot 43 can be designed in different ways for different pedaling conditions and figure 1 shows an embodiment consisting of a pivot-suspended, v-shaped support plate with a vulcanized and ribbed patterned rubber surface. Figure 12 shows another embodiment where the support foot is combined with a transport function, which will be described later. Figure 5 shows the locking jaw 50 mounted in the cavity between the fixed part 41 of the support leg and its extendable part 42. The locking jaw 50 consists in the shown embodiment of two uniform locking jaw parts 51a and 51b, where 51a is fixedly mounted in the fixed part 41 and 51b is rotated 180 ° relative to the fixed locking back part 51a and freely mounted in the clearance between the locking back part 51a and the extendable part 42 of the support leg.
    The locking back parts 51a and 51b each have their own rolling plane, facing each other, with a number of applied rollers 53 in between. The rolling planes are oriented with the angle oi between the rolling plane and the longitudinal direction of the support leg. Two similar springs 52 are recessed in the end faces of the locking jaw parts and hold the jaws together in the transverse direction of the roller plane while pushing the locking jaw parts apart in the longitudinal direction of the roller plane, so that the free locking jaw part 51b via the roller plane is pushed out against the support leg extendable part 42. effect. The free locking jaw part 51b is further provided with a friction lining 54 acting against the extendable part 42. The self-inhibiting effect of the locking jaw can be deactivated by an eccentric knob 55 compressing the locking jaw parts longitudinally and then the installation is released by locking jaw part 51b. The extendable part 42 of the support leg can in this position run freely in the fixed part 41 of the support leg, can be completely pulled out and replaced or rotated 90 ° and reassembled to e.g. change the step footprint geometry. The eccentric knob 55 can be designed as a continuous pivot shaft 56, which is mounted in the fixed part 41 of the support leg and which ends on the outside in a bent knob. On the axis of rotation, another shaft part 57 is welded, the length of which is adapted to the width of the cavity. When mounting the support leg extendable part 42, the pivot shaft 56 is first mounted through a keyhole 58 from one side of the attached part 41, oriented so that the extendable part of the support leg then partially covers the keyhole 58 and prevents the eccentric knob 55 from being inadvertently disassembled.
    Figures 6 and 7 show the force balance over the locking jaw 50 under different conditions.
    The following calculations show the conditions that apply to the parameters of the locking jaw, in order for it to have the desired self-inhibiting locking function in one direction, but always release the locking function in the other direction. The designations used in the figures and in the calculations are: oi = Angle of the rolling plane towards the longitudinal direction of the outrigger plane. pl = Coefficient of friction between locking jaw 51 b and extendable part 42 of the support leg. p2 = Coefficient of friction between the attached part 41 of the support leg and extendable part 42.
    Ff = the joint force of the shoulder springs 52 in its longitudinal direction.
    Fs = Perpendicular force component to the outrigger plane.
    Fr = Perpendicular force component to the rolling plane.
    We ignore the impact of rolling friction along the rolling plane.
    Fk = Maximum holding force from the springs 52 on the extendable part 42 of the outrigger.
    Fl = The force with which the extendable part 42 of the support leg is loaded.
    Fb = The force transmitted via the locking jaw 50 from the total load F1.
    Figure 6 shows the force balance at unloaded support leg.
    On the locking jaw 51b, two springs act with a joint force of Ff in the direction of the rolling plane which is c: degrees relative to the longitudinal direction of the support legs. In the rest position, this force is balanced by a force Fr perpendicular to the rolling plane and a force Fs perpendicular to the support leg plane. In the case of unloaded support leg, Fs = Ff / sin oi. When the support leg is pulled down, this is affected by a fully developed frictional force, partly between locking jaw 51b and the extendable part 42 of the support leg and partly between the extendable part 42 and the fixed part 41. The frictional force against locking jaw 51b will now precisely balance the vertical component of the spring force. which means that we can calculate the extract-loaded Fs to Ff / pl x cos oi. From this connection, we can calculate the maximum force Fk that the application force of the springs affects the extendable part 42 of the support leg.
    Fk = Fs x (pl + p2) = Ff / pl x cos oi x (pl + p2) = Ff x (l + pZ / pl) x cos oi.
    The weight of the extendable part 42 of the support leg, including the support foot 43, must not exceed the force Fk, as these can then inadvertently fall out of the attached part 41. 10 15 20 25 30 10 Figure 7 shows the force balance when the support leg is loaded.
    If the locking jaw 5lb is actuated in the vertical direction by a lifting force Fb, this is balanced by the force Fs perpendicular to the support leg plane and the force Fr perpendicular to the rolling plane. From this connection it is obtained that Fs = Fb / tg oi. In order for the extendable part 42 of the support leg to have a self-inhibiting lock, the following conditions must apply: Fb <Fs x pl, which means that Fb <Fb / tg oi x pl. This gives a first operating condition: The coefficient of friction pl> tg oi The total lifting force in this case is F1 = Fb + Fs x p2. In order for the locking jaw 5lb to be released during unloading, the following conditions shall apply: Fb> Fb / tg oi x p2.
    This gives a second operating condition: The coefficient of friction p2 <tg oi.
    In these calculations, we have disregarded the influence of the spring force, in order to make the conditions simpler. The spring force is superimposed on the shown force balance but does not affect the calculated conditions for the coefficients of friction.
    We give an example of an embodiment where we assume that the angle oi is l8 ° and then get that tg l8 ° = 0.32. The coefficient of friction p1 for aluminum against the friction lining> 0.5 (eg hard rubber). The coefficient of friction p2 for aluminum versus aluminum <0.3 (approx. 0.26). With these conditions, the locking jaw 50 will function as the invention is intended.
    The step support 1, with its innovative thinking in function and flexibility, is the cornerstone of the invention, which provides the possibility of a number of interesting areas of use.
    Figures 1, 3 and 4 show how the step support is used as a step stabilizer against the ground.
    The ground can slope up to 20 ° without any problems, as the support legs have a long adjustment period and can be adjusted completely steplessly. Since the extendable part 42 of the support leg is a standardized square tube, this can easily be replaced to the desired length with e.g. custom support foot. Figure 1 also shows how to mount a leveling bucket 15 on the crossbeam 10 and thus get an auxiliary function, to safely set up the steps in optimal inclination to the wall (15 °) and vertically to the side. Figures 2, 8 and 9 show how the step support 1 can be rotated 90 ° in its plane and mounted at the top of the steps as a step stabilizer against the wall. The steps then receive, in addition to a stable step against the wall, a lift from the wall that can be adjusted, depending on the length of the support legs, e.g. from 220-650 mm. This makes it easy to access with the steps outside the eaves and the like. Figure 2 also shows how you can easily turn the support leg tube 90 ° and thus get a more optimal pedal for the support foot. Figure 9 shows how the step support is mounted correspondingly in the top of the steps, with the support legs fixed by means of the locking screw 33, in an inwardly inclined position. This assembly makes it possible to place the steps over a wall corner, which further improves the access of e.g. roof end. Figure 10 shows how, in a folded position, the step support can easily be stored without taking up much space.
    Figure 11 shows an embodiment where the step support 1 is mounted near the top of the steps as a step stabilizer against the wall. The step support 1 is provided with a safety frame 61, suitably of aluminum tubes, which is mounted by means of terminating pins in the mounting hole 14 of the mounting beam. A strap 62 from the shackles of the safety frame encloses the steps and gives the frame sufficient torque absorption capacity. A standing plane 63, preferably in extruded aluminum, is mounted with a snap function over the crossbeam. The work platform thus created, provides a restful standing surface and with the safety arch's close contact with the back end, provides personal safety that has never before been possible when working from a ladder. The safety frame can advantageously be provided with an adjustable material shelf 64, which makes it possible to e.g. handle paint can and brushes when working from the steps.
    Figure 12 shows an embodiment which is intended for free installation of a ladder independent of the surroundings. The steps have a step support 1 and a slope support 70, which makes it possible to place the steps completely freely, independent of ground terrain, in order to be able to reach e.g. post luminaires, birdhouses or used for pruning and harvesting fruit trees. The inclined support 70 has two support legs 72 which are interconnected in a cross beam 71 (partially obscured in the figure) which also has a fastening device for anchoring in a step pin. The support legs 72 can be rotated both laterally and backwards for the best support geometry and then fixed. The support legs 72 each consist of a fixed part and an extendable part with a built-in, self-inhibiting locking jaw, completely functionally similar to the support legs 40 in the step support 1, but with a considerably longer adjustment range. Previously, the working platform, which consists of a protective arch 61, a tensioning belt 62 and a standing plane 63, has been described and here the same platform can be used, mounted on a crossbeam, which only consists of the square tube 11. It is mounted to the side beams as previously described for the step support.
    Furthermore, the extendable support leg tube of the step support has been replaced with wheeled support legs 80. The wheeled support leg tube is an embodiment that can be used in several ways (see another example in Figure 13). The support wheel 81 is mounted on a shaft 82, the free end of which has a stop socket which holds the wheel. The shaft 82 is mounted in a free-standing hole at right angles straight through the support leg tube and terminates in a washer 83 which can accommodate some axial movement on the shaft. The shaft 82 can be axially clamped e.g. by means of a grip-friendly screwdriver 84 which is recessed in the end surface of the shaft. On the outside of the support leg tube against the wheel plate there is at least one preferably two fixed friction blocks 85. By means of the screw knob 84 the wheel 81 can now be locked against the friction blocks 85 and then functions as a fixed flexible support foot. When the screw knob 84 is unscrewed a few turns, the wheel acts as a transport wheel. The wheel 81 should have a vulcanized, ribbed patterned rubber tread surface, which is slightly arched to provide good ground contact even with inclined wheels. The steps can now be easily moved on the ground, without having to lay down and travel the steps again for each move. This method, for moving the ladder sideways, is also useful when a ladder with step support and work platform is used against a wall at e.g. facade renovation.
    Figure 13 shows an embodiment where two step supports 1 and two ladders (or a two-part extension ladder) are used as a base in a scaffolding system intended for one person. The step supports 1 are mounted in the usual way at the lower end of the ladders as step stabilizers against the ground. Two crossbars 91, of e.g. plate aluminum, are mounted opposite each other and anchored in the cavities of the rungs by means of screwable expander couplings 94. The scaffolding platform 92 can be two simple planks or be prefabricated in sandwich technology or aluminum beam technology. Two railing beams 93, of e.g. aluminum pipes, can be mounted at a suitable height above the platform by means of similar expander couplings 94 used for the crossbars. The stand thus created is easy to assemble, easy to level in uneven terrain, in that all the support legs are individual, steplessly adjustable and the stand is easy to use by one person. The platform and the width between the railing beams are quite narrow, which makes it impossible for two people to meet, but on the other hand, one person is always close to railing contact, which increases personal safety. The railing beam can advantageously be provided with a movable material shelf 95, which makes it possible to e.g. handle paint can and brushes when working from the stand. The extendable support legs of one of the step supports can be replaced with wheeled support leg tubes 80, as previously described. The second step support can be provided with two shackle handles 96, which means that the stand can be easily moved and handled by one person. If shackle handle 96 is mounted to both step supports, two people can easily carry around the stand.
    权利要求:
    Claims (1)
    [1]
    A patent support (1) for a ladder comprising - at least two support legs (40); - a cross beam (10), which connects said support legs and to which the support legs are rotatably attached; and - at least one fastening device (20) intended for attaching the step support to the steps; characterized in that the ends (12) of the crossbeam are designed so that the support legs (40) in the unfolded position rest against the ends of the crossbeam. The step support (1) according to claim 1, wherein the support legs (40) can be rotated to at least two fixed positions, partly to a folded-out position and partly to a folded position where the support legs (40) are substantially parallel to the crossbeam (10). The step support (1) according to any one of the preceding claims, wherein the step support (1) is intended to be attached to the side beams ~ (101) of the steps. The step support (1) according to any one of the preceding claims, wherein the cross beam (10) comprises at least two fastening devices (20) and wherein the distance between the fastening devices is variable. Step support (1) according to any one of the preceding claims, wherein said fastening device (20) comprises a nut block (21), a fastening screw (23) and a beam grip (24), wherein the nut block (21) is floatably mounted inside the fastening beam (11) and has at least one threaded hole (22) for receiving the fastening screw (23), and where the beam grip (24) is intended to be fastened with the fastening screw (23), which passes through a slot (13) in the crossbeam (10) and into the threaded hole (22). Step support (1) according to any one of the preceding claims, wherein said fastening device (20) has fastening possibilities from two substantially perpendicular directions. Step support (1) according to any one of the preceding claims, wherein said support legs (40) comprise a fixed part (41) which is rotatably attached to the cross beam (10) and a slidable part (42) which is displaceable relative to the fixed part ( 41). Step support (1) according to claim 7, wherein the extendable part (42) has a square cross-section and the fixed part (41) a rectangular cross-section or vice versa, so that one part is telescopically movable inside the other. Step support (1) according to any one of claims 7-8, wherein in the space between the extendable part (42) and the attached part (41) there is a self-inhibiting locking jaw (50), which allows the support leg (40) to be pulled out to the desired length but prevents it from being pushed back. Step support (1) according to claim 9, wherein the locking jaw (50) comprises two locking jaw parts, a first locking jaw part (51a) fixedly mounted to the attached part (41) and a second locking jaw part (51b), with free play against the extendable part ( 42), the second locking back part (51 b) and / or the extendable part (42) are provided with friction lining (54), each locking back part each comprises a roller plane, mounted towards each other at an angle a between the roller plane and the longitudinal direction of the support leg and between the roller planes bearing rollers (53), shoulder springs (52) hold the locking jaw parts together and strive to push them apart so that the second locking jaw part (51b) abuts against the extendable part (42). Step support (1) according to claim 10, wherein the locking function can be deactivated by squeezing the locking back parts. Step support (1) according to one of the preceding claims, wherein the step support further comprises a safety frame (61) which can be mounted on the cross beam (10). Step support (1) according to any one of the preceding claims, wherein the extendable part (42) of the support leg is provided with a combined transport and support foot, comprising at least one wheel (81) mounted on a projecting shaft (82), where the shaft (82) mounted in a free hole perpendicular to the outrigger tube and fixed by a clamp (84) with which you can mute the wheel (81) to the outrigger, by tensioning the wheel (81) axially against at least one friction block (85) between outriggers and wheel disc, but by releasing the tension, the locking stops and the wheel acts as a transport wheel. A step set comprising two step supports (1) according to any one of the preceding claims, two standard ladders (100), two cross struts (91), mounted opposite each other to connect the ladders to a geometry locked unit and a platform (92), where the parts of the step support together form a scaffolding system.
    类似技术:
    公开号 | 公开日 | 专利标题
    CA1219571A|1987-03-24|Safety ladder
    US9109394B2|2015-08-18|Adjustable ladder support mechanism
    US9273515B2|2016-03-01|Roofing ladder with a modular angularly adjustable platform
    US20160024844A1|2016-01-28|Safety ladder and work platform for helicopter and aircraft maintenence
    US20150354276A1|2015-12-10|Collapsible ladder
    US20100116592A1|2010-05-13|Adjustable Stepladder
    US20110067954A1|2011-03-24|Ladder Safety Device
    US20080105497A1|2008-05-08|AccessTower
    US6688426B1|2004-02-10|Wheel extension and lift device for ladders
    US9694936B2|2017-07-04|Lifting and transporting system
    US20100213007A1|2010-08-26|Ladder system
    CA3079044A1|2019-04-18|Support apparatus
    AU2016309949B2|2022-01-20|An extendable work platform
    SE0900540A1|2010-10-24|Ergonomic and safety systems for ladder
    CA2757304C|2014-05-20|Collapsible safe ladder
    WO2016151307A1|2016-09-29|Adjustable scaffold
    US9587408B1|2017-03-07|Roof workman&#39;s utility box
    AU2017100930B4|2018-02-08|Height adjustable ladder
    HU9801136A2|1998-08-28|Ladder-supported working platform
    EP2407610A2|2012-01-18|Scaffold and ramp
    RU2186921C1|2002-08-10|Rung ladder
    CN215565649U|2022-01-18|Herringbone ladder with auxiliary supporting legs
    KR102241781B1|2021-04-19|Height-adjustable movable work platform
    US20190226277A1|2019-07-25|Portable ladder and rolling shaft
    WO2010046670A1|2010-04-29|Stand assembly
    同族专利:
    公开号 | 公开日
    SE533948C2|2011-03-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2014036606A1|2012-09-05|2014-03-13|Branach Technology Pty Ltd|Improved ladder levelling stabilizer|
    WO2020169942A1|2019-02-18|2020-08-27|Garry Mcdonald|Improved step ladder and support structure|
    法律状态:
    2014-12-02| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE0900540A|SE533948C2|2009-04-23|2009-04-23|Ergonomic and safety systems for ladder|SE0900540A| SE533948C2|2009-04-23|2009-04-23|Ergonomic and safety systems for ladder|
    [返回顶部]