MX2010003702A - Mobile scaffold for handicapped people. - Google Patents

Abstract

Mobile scaffold with a system for lifting a person and his tools by means of a hydraulic system, where the user may carry out the labours corresponding to his profession at different heights, from 0.75 m to 3 m over the floor level. The life quality of the user is thus improved. The scaffold is of substantial usefulness for people having or not their lower limbs, since they may work in a standing or sitting position, with the single condition of having mobility and strength in their upper limbs for activating the mechanisms of the platform in horizontal and vertical displacements. The transmission system has been designed to be displaced with the same easiness of a common wheelchair at any height level.

Description

MOBILE SCAFFOLDING FOR DISABILITIES TECHNICAL FIELD OF THE INVENTION The present invention has its technical field in the mechanical area because it provides a mobile scaffold for disabled people, which has: a lower chassis, a pantograph-type lifting system, an upper chassis, a tool rack, a reclining and rotating seat conventional sliding with adjustable, collapsible and removable legrest, a hydraulic system, a manual transmission system, a front upper stabilizer system, a rear upper stabilizer system, a front lower stabilizer system, a protective guard system and a brake system .

BACKGROUND OF THE INVENTION The patent document (EP90100404) describes an invention that relates to telescopic guide rails for diagonal or scaffolding elevators having a single arm and a double arm joined in a box profile by a bridge between means. The soul of the invention is in the special design of the double arm or the box profile formed by it in order to achieve optimum stability and absolute resistance against deformation and at the same time advantageous possibilities of connection with the steps of the diagonal elevator.

On the other hand patent document MX 154479 refers to improvements in vertical scaffolding of tabular sections used in construction works, of the type comprising a pair of frame assemblies arranged in parallel, each including a plurality of frames comprising a pair of external vertical members, said frames being stacked vertically one on top of the other, pins between said frames for said stacked frames to be secured together; and clamps that connect said pair of frame assemblies, said improvements being characterized in that each frame includes a centrally located integral ladder comprising a pair of vertical members and a series of steps of two ends, horizontally separated, rigidly connected at each end to each of the vertical members and fasteners rigidly connecting said ladder to each of the external vertical members, said ladder being placed in vertical alignment when the frames are stacked vertically one on top of the other.

On the other hand the patent document: MX 151347 refers to improvements in scaffolding system, of the type comprising a joint placed between the substantially perpendicular scaffolds; a ledge practiced on one of the scaffolds and; a lever mounted pivotably on the other scaffold, with a cam face that can be brought into contact with the projection, to work the two scaffolds together, characterized in that the projection includes a substantially uniform annular portion located around the periphery of the first scaffold, being mounted at the end of the second scaffold, a housing adapted to cooperate with the projection to carry the lever, such that the second scaffold can have any desired radial orientation, relative to the first scaffold.

For its part, the patent document MX 190132 describes a coupling for use in a scaffolding system for connecting transverse members with vertical members, the coupling is characterized in that it comprises: a pair of annular flanges for mounting in a spaced relationship in a vertical member to form a slot therebetween, each flange has an outer ring and at least one opening and a lashing pin, which is configured to extend through the slot and into an opening in each flange, wherein a portion adapted from a transverse member can be inserted into the slot and locked in the coupling by the lashing pin, the portion adapted has a first portion which extends into the groove and a second portion formed to practically butt against the outer ring of each flange.

A search for commercial brands on scaffolding was carried out in a personal way, among others the following: the JLG Platforms brand has two identical models but with different load capacities, in which the use of pantograph-type lifting systems is observed. industrial use whose configuration consists of several elements, which results in more labor to build them, as well as a high maintenance cost. These scaffolds work with an internal combustion engine each and are not practical for them to be operated by a person with disabilities in their lower extremities since they lack an ergonomic seat for the disabled, and the controls are not available to the user.

The drawbacks of the scaffolds described above are that they do not combine mobile systems with telescopic and scissor-type systems; In addition, people with disabilities in their lower extremities can not work on them, since, as stated above, they need to be assembled by modules and to work in different areas and at different heights, they must be lowered and pushed or lifted manually either together or by modules .

Therefore, to counteract these drawbacks, a scaffold for the disabled was developed, however, it can be used by people without disabilities, which is described below.

DESCRIPTION OF THE INVENTION The characteristic details of this mobile scaffold for the disabled are clearly shown in the following description and in the accompanying figures, as well as an illustration thereof and following the same reference signs to indicate the parts and figures shown. Where said description and figures are mentioned by way of example, so they should not be considered as a limitation to the present invention.

Brief description of the figures: Figure 1 is a perspective view of the lower chassis of the scaffolding of the present invention, which we classify with the letters Cl.

Figure 2 is a right side view of the pantograph-type lifting system, which constitutes the scaffolding of the present invention. Where said lifting system is identified with the letters EP.

Figure 3 is a perspective view of the upper chassis of the scaffold, in question, which we will describe with the letters CS.

Figure 4 is an explosive perspective view of the tool rack of the scaffold in question, which we will describe with the letter P.

Figure 5.- It is a conventional perspective view of the seat, which we will describe with the letter A.

Figure 6 is an explosive perspective view of the seat slider system referred to in Figure 5, where the incorporation of a folding leg system can be seen.

Figure 7.- It is a perspective view of the hydraulic system that allows the vertical movement of the platform, which we will describe with the letter H.

Figure 8 is a front view of the hydraulic manual pump, of the present scaffolding.

Figure 9.- It is a perspective view of the hydraulic manual pump.

Figure 10.- Is a right side view of the lower hydraulic cylinder, mounted between the first and second crossheads of the pantograph-type lifting system.

Figure 11.- It is a right side view of a second hydraulic cylinder, mounted between the second and third crossheads of the pantograph-type lifting system. Figure 12.- It is a right side view of the manual transmission system, of the scaffolding in question, which we will describe with the letter T.

Figure 13.- It is a perspective view of the upper front stabilizer system, which we will describe with the letters ESD.

Figure 14.- It is a perspective view of the upper rear stabilizing system, which we will describe with the letters EST.

Figure 15.- It is an explosive perspective view of the lower front stabilizing system, which we will describe with the letters EID.

Figure 16.- It is a perspective view of the first right protective guard, of the transmission system of the scaffold in question.

Figure 17.- It is a perspective view of the second right protective guard, of the transmission system of the scaffold in question.

Figure 18.- It is a perspective view of the third right protective guard, of the transmission system of the scaffold in question.

Figure 9.- It is a perspective view of the fourth right protective guard, of the transmission system of the scaffold in question.

Figure 20.- It is a hydraulic diagram of the platform lifting system.

With reference to said figures, the mobile scaffolding for disabled persons consists of: a lower Cl chassis, an EP pantograph lifting system, a CS upper chassis, a P tool rack, a conventional sliding and reclining seat with adjustable leg rest, folding and demountable A, a hydraulic system H, a manual transmission system T, a front upper stabilizer system ESD, a rear upper stabilizer system EST, a front lower stabilizer system EID, a set of G protective guards, a brake system F.

The lower chassis (Cl) comprises a rectangular frame, preferably of the material called rectangular, square or round profile; said frame is formed in turn by four tubular sections; a front tubular section (Cl 1) parallel to the back (Cl 2) of the same dimension, which are joined in corner to two other parallel lateral tubular sections (Cl 3 and Cl 4); in these side tubulars, a hearth frame (Cl 5 and Cl 6) is attached on each side to the outer sides, serving as axle holders for the lower pneumatic traction tires (Cl 7 and Cl 8); The front part (Cl 1) of the lower frame has supports (Cl 9, Cl 10 and Cl 1 1) for the front stabilizers, a front rail (Cl 12) and another rear rail (Cl 13), as well as the corners of the chassis frame where the element (Cl 2 and Cl 3) joins the right side and the elements (Cl 2 and Cl 4) on the left side, has two supports (Cl 14 and Cl 15) in the lower part, one in each corner, on which are mounted on each of them a conventional idler or multidirectional wheel (Cl 16 and Cl 17), which serve to give direction and positioning to the scaffold when it moves horizontally with traction that will receive the pneumatic wheels through the transmission system based on chains and sprockets; in the upper front part of the frame of the chassis in each corner are joined two pairs of plates (Cl 18 and Cl 19) parallel to the lower chassis, which act as a joint and base for the front support of the first crosshead (EP 5) of the system lifting pantograph type; the outer plates of said pair of plates (Cl 18 and Cl 19) in each of them is attached a stump (Cl 20 and Cl 21) on which the fifth pair of double bitters (T 14) are mounted, which are fixed, of the transmission system, as well as the protective guard (G 4) of one of the transmission chains (T 6); on the upper central part of the front tubular of the chassis are joined the articulated supports (Cl 22) of the upper front stabilizer; in the upper rear part on the side chassis of the chassis near each corner is mounted a rail type support (Cl 23 and Cl 24) where it slides the articulation and base of the rear support (EP 7) of the first crosshead of the lifting system type pantograph; in the part upper center of the rear tubular (Cl 2) of the chassis are joined the articulated supports (Cl 25) of the upper rear stabilizer.

The lower chassis can comprise a second pair of idle or multidirectional wheels such as (Cl 16 and Cl 17) to allow greater maneuverability of the scaffolding, so it is preferably placed in the middle part of the lower chassis. Therefore, said variant is included in the present invention.

The pantograph lift system (EP) is made up of at least one pair of crossarms; however, in the present example, we will describe the modality of three pairs of crossheads: one lower (EP 1), one intermediate (EP 2) and one superior (EP 3), arranged on the lateral sides of the scaffolding. Each crosshead is constituted by an external arm (EP 4) and an internal arm (EP 6) joined together in their middle part by a screw passed with nut (EP 9) that allows the articulation of said arms. The lower crosshead (EP 1) is attached to the upper front support of the chassis (Cl 18) by means of a hinge system articulated by means of one screw passed (EP 5) and the other arm (EP 6) is attached to the upper rear support ( EP 7) of the chassis with the same hinge system, but joined to the train of bearings (EP 8) that slides on the rail type support (Cl 23). The upper ends of the arms (EP 4 and EP6) are joined by means of a hinge system articulated by means of screws passed (EP 10) and (EP 11) to the lower ends of the arms of the intermediate crosshead (EP 2); the intermediate crosshead as well as the lower crosshead consists of two arms (EP 12 and EP 13) bored at half its length and joined by means of a screw passed (EP 14), which allows the function of "scissors" ", its lower ends are hinged by means of a screw passed to the upper ends of the arms of the lower crossarm, and the upper ends of the arms are joined by a hinge system articulated by means of past screws (EP 15 ) and (EP 16) to the lower ends of the arms (EP 17 and EP 18) of the upper crosshead (EP 3); the crosshead superior as the intermediate crosshead consists of two bored arms (EP 17) and (EP 18) at half its length and joined by means of a screw passed (EP 19), which allows the function of "scissors" ", its lower ends are joined with hinges by means of a screw passed to the upper ends of the arms of the intermediate crosshead, and the upper end of the arm (EP 17) is joined by a hinged hinge system by means of a screw passed (EP 20) to the lower front support (CS 6) of the upper chassis of the scaffolding and the arm end (EP 18) joins the lower rear support of the upper chassis with the same hinge system, but attached to the bearing train ( EP 22) by means of a screw passed (EP 21) that slides on the rail type support (CS 7).

The upper chassis (CS) comprises a tubular frame, preferably of the material called rectangular, square or round profile; that said upper chassis is formed by four tubular sections; a front tubular section (CS 1) parallel to the back (CS 2) of the same dimension, which are joined in corner to two other parallel lateral tubular sections (CS 3 and CS 4); In the lower front part of the frame of the upper chassis, at each corner, two plates (CS 5 and CS 6) are joined together which serve as a joint and base for the front support of the third crosshead of the pantograph-type lifting system, in the lower rear of the frame of the upper chassis, on the tubular side of the chassis next to each corner is mounted a rail type support (CS 7 and CS 8) where it slides the articulation and base of the rear support of the third crosshead of the pantograph-type lifting system; at the front it has a base for a seat, which in this case consists of: two sections of tubulars (CS 9 and CS 10), which are welded to the lateral tubulars (CS 3 and CS 4) of the upper chassis, on which is welded a drilled plate (CS 1 1) on which a pivot of the folding seat (A) rests and rotates; Near the central part of the chassis and on the upper side of the side tubes are welded two tubular supports in the form of an inverted "L" (CS 12 and CS 13), leaving the horizontal portion of the "L" towards the outside of the chassis , in such a way that they serve as support for the braking system of the upper wheels or transmission wheels (T 1 and T 1 b); next to the central part of the upper chassis has another tubular section (CS 14) welded to the two lateral ends of the chassis and on which rests a pump of the hydraulic system (H 2); in the central part of the upper chassis is a transverse vertical frame that supports the upper wheels (T 1 and T 1 b), which is formed by two triangular columns (CS 15 and CS 16), one on each side of the frame of the chassis and a support bar (CS 17) is fixed on each of the vertices of said triangular columns; a piece in the shape of "T" (CS 18) is fixed inclined to the support bar (CS 17), said piece in the form of "T" serves as support for the handles of the drive of a conventional bicycle braking system to control the top wheels. However, this brake system can be replaced by a conventional braking system for wheelchairs, which would eliminate the piece in the shape of "T" (CS 18), which would be mounted directly on each of the supports in the form of "L" inverted (CS 12).

A support system for a tool rack (P) is provided in the upper rear part of the upper chassis (CS), which can be a series of at least four tubular supports (CS 19-a, CS 19-b, CS 19-c and CS 19-d) in vertical position, on which the tubular legs of the tool rack are inserted. The support system of the aforementioned tool rack can comprise a platform similar to the base of the seat support, with a rotating shaft, on which said tool rack (not shown) is placed.

The tool rack (P) is formed by a table (P 2), in each of its corners is placed a tubular past (P 4-a, P 4-b, P 4-c and P 4-d), where said The tubular supports are introduced through their lower end into the tubular supports (CS 19-a, CS 19-b, CS 19-c and CS 19-d) of the upper chassis. Where the surface (P 5) of the table (P 2) can be manufactured from different materials. Said tool grille (P) can additionally comprise a protective handrail formed by a frame (P 1) with the same shapes and dimensions as those of the grille and a leg (P 3-a, P 3-b, P 3- cy P 3-d) is placed in each corner of said upper frame (P 1), where said leg has a dimension that allows it to be introduced to the tubular legs (P 4-a, P 4-b, P 4-c and P 4-d) of the grid, which join one inside the other until reaching the stops (P 6) located externally in the middle part of each leg (P 3-a, P 3-b, P 3-c and P 3- d) of the guardrail, in such a way that said guardrail can be put on or taken off.

The seat (A) used in the present invention is of those commonly known in vehicles, which are generally foldable, sliding, reclining and have a headboard on its upper part of the backrest which is foldable and adjustable (A 3). The modifications made to the present seat, is that in its support base, a plate (A 22) was added, supported in the central part of the frame that forms the support base (A 15 and A 23) (see figure 6); a stem (A 20) is fixed vertically in the lower part of the plate (A 22), which is inserted, by its lower end, to the plate (CS 1 1) of the upper chassis, it should be noted that the stem has a diameter that allows it to enter said plate (CS 11) but allowing it to rotate on its own axis; a legrest (A 16) is inserted in each lateral tubular element (A 15) of the base support of the seat which are fixed through fastening means such as butterfly screws (A 17) among others, but which allow to adjust the length of the leg portion portion (A 16) that is introduced to the lateral tubular elements (A 15), so that said leg rest is adjustable to the needs of the user; at each lower end of the legs has an articulated feet (A 24) which is attached to the legs by means of a hinge that allows it to articulate, providing more space for the user access to the seat (A), in the if the user has his lower extremities. Another modification of the present seat is that it provides means of restraint for a safety belt (A 4), in this specific case, the fastening means are assembled in one of the upper and lower ends of the backrest.

The hydraulic system (H) has a manual pump (H 2) of directional valve of four ways and three positions with ratchet, of the commonly known, which is mounted on the tubular section (CS 14) of the upper chassis, by means of the past screws (H 12, H 13 and H14); two double-acting cylinders (H 3 and H 4) (hydraulic jacks) and connecting hoses (H 7, H 8, H 9 and H 10). The lower part of the lower hydraulic jack (H 3) is coupled in an articulated manner by means of a screw (H 15), to a frame (H 16) that rests on the inner faces of the internal bars (EP 6) of the first Crossarms of the pantograph lift system, said crossarms go one on each side of the scaffold, which open when pushed down the bottom of the jack; the upper part of the lower hydraulic jack is mounted and articulated by another screw (H 17) to another frame made of tubular material (H 18) which is attached to the internal faces (EP 13) of the second crossarms of the lifting system type pantograph, in this part the cat pushes up and as the other end of the cat pushes down, this causes the crossarm to open and cause the upper chassis of the scaffold to rise, however, the rise is facilitated by the action of the two cats the superior and the inferior; the upper hydraulic jack (H 4) is mounted and articulated in the lower part by means of a screw (H 19) to the same frame (H 18) of the upper end of the lower jack, which is supported on the internal face (EP 13) of the same crosshead of the pantograph-type lifting system, and the upper part of the upper jack is assembled and articulated by means of a screw (H 20), to another frame (H 21) made of tubular material that is attached to the internal faces ( EP 17) of the third crosshead of the pantograph lift system, like the lower jack, the upper jack causes the second and third crossbar to open causing the platform to rise.

The transmission system (T) is made up of, at least: a pair of steering wheels (T 1), four pairs of chains (T 2 to T 7), a pair of upper simple sprockets (T 8), a pair of simple lower sprocket (T 9), a pair of intermediate double sprockets (T 10 to T14), two pairs of articulated arms for distance adjustment (T 16 and T17) and a pair of pneumatic wheels (T 5). In this example we will only explain one of the sides of the scaffold formed by three crossheads, where the components of the transmission system are distributed. A drive wheel (T 1) is placed on top of the upper chassis (CS) of the scaffold; the main engine catarina (T 8) is located between the steering wheel and the upper chassis, mounted on the axis of said steering wheel (T 1) both pieces forming a single entity and are mounted on the column (CS 15); a first arm (T 16) is attached to the axis of the drive wheel (T 1), in an articulated manner; whose free end is joined to a second arm (T 17), also in an articulated manner, which in turn its free end is joined at the center point of the upper crosshead (EP 3); the first floating double catarina (T 10) is located at the junction of the two arms (T 16 and T17) of the distance adjustment motor system, this Catarina (T 10) is connected on one side to the motor catarina (T 8) ) by means of a chain of transmission (T 2), and on the other hand, to the second fixed double Catarina (T 1 1) by means of another chain (T 3); the Catarina (T 1 1) is located in the central part of the outer face of the outer bar (EP 18) centered by the screw (EP 19) of the third crosshead; these three ladybugs, the main motor catarina, the first floating double catarina and the second fixed double catarina (T 8, T 10 and T 11 respectively), and the chains that join them are part of the motor distance adjustment system; the continuous transmission system of the second fixed double Catarina (T 11) to the third fixed double Catarina (T 12) by means of another transmission chain (T 4), this third double Catarina (T 12) is located in the center of union of the outer bars (EP 18 and EP 12) where the last screw (EP 16) of the third and second cross pieces (EP 3 and EP 2) is located; the continuous transmission system of the third fixed double Catarina (T 12), to the fourth fixed double Catarina (T 13) by means of another transmission chain (T 5), this fourth double Catarina is located in the center of union of the outer bars (EP 12 and EP 4) where the last screw (EP 10) of the second and first crossheads (EP 2 and EP 1) is located; the system of continuous transmission of the fourth fixed double Catarina (T 13) to the fifth fixed double Catarina (T 14) by means of another transmission chain (T 6), this fifth double Catarina is located in the center of union of the outer bar (EP 4) where the last screw (EP 5) of the first crosshead (EP 1) is located with the lower chassis (CS) of the scaffold; the continuous transmission system of the double Catarina (T 14) by means of another transmission chain (T 7) towards a Catarina (T 9) that is mounted on the axis of the lower pneumatic wheel (T 15), both forming a single entity which is mounted on the right side at the front of the lower chassis on the wheel support frame (Cl 5); On the left side there is another identical mirror system to provide between the two systems the horizontal and rotational movement of the scaffolding.

The upper front stabilizer system (ESD) which is located in the front of the scaffolding above the lower chassis (Cl 1), said stabilizer system consists of at least two sets of frames, each set articulated independently one of the another, by means of a hinge in each union of the frames; the first frame is made up of the arms (ESD 2 and ESD 3) and the tubular ones (ESD 1 and ESD 4); the first hinge is located on the front of the lower chassis (Cl 1) allowing the articulation between the first frame of the stabilizer system and the lower chassis; the protruding ends of the rod of said hinge, are housed inside the elements (Cl 22) as a stop and articulation; the tubular (ESD 4) serves to form a second hinge, for which, inside the rod is housed (ESD 16), allowing the union and articulation between the first and second frame, said rod of the second hinge, has in its ends a stop (ESD 25 and ESD 26) to prevent it from coming out of the joint; on the rod of the second hinge, the arms (ESD 5 and ESD 6) of the second frame pivot next to their ends, therefore, said second frame is formed by the second hinge, the arms (ESD 5 and ESD 6) and a third hinge, whose rod (not illustrated in Figure 13) is housed inside the tubular (ESD 7), which pivots on said rod not shown; at the ends thereof, two lengths of tube (ESD 22 and ESD 23) are inserted, which are welded to the front joint of the arms (EP 6) joining the first and second crossheads of the lifting system. In the same way a second pair of frames, articulated and shaped in the same way as the first set of frames, is formed by a third frame constituted by a fourth hinge, the arms (ESD 9 and ESD 10) and the fifth hinge; the fourth hinge is located on the arms (EP 13) of the pantograph-type lifting system allowing articulation between said system and the third frame; the protruding ends of the rod of the fourth hinge, are housed inside the elements (ESD 20 and ESD 21) as a stop and articulation; The tubular (ESD 1 1) serves to form a fifth hinge, for which, inside the rod is housed (ESD 17), allowing the union and articulation between the third and fourth frame, the rod of the fifth hinge, has at its ends a stop (ESD 27 and ESD 28) to prevent it from leaving the joint; on the rod of the fifth hinge, the arms (ESD 12 and ESD 13) of the fourth frame pivot next to their ends, therefore, said fourth frame is formed by the fifth hinge, the arms (ESD 12 and ESD 13) and a sixth hinge, whose rod (not illustrated in Figure 13) is housed inside the tubular (ESD 14); The ends of this rod are inserted two sections of tube (ESD 18 and ESD 9), which are welded to the front joint of the arms (EP 12) that join the second and third crossbar of the elevator system. These two sets of frames make up the upper front outrigger system that prevents the scaffolding from bobbing on the lower chassis, providing greater safety for the user.

The rear upper stabilizer system (EST) is located on the back of the scaffolding above the lower chassis (Cl), as shown in figure 14, and is made up of three frames articulated one after the other, by hinges, forming a kinematic chain; a first frame horizontal formed by two hinges parallel to each other and separated by two parallel arms (EST 3 and EST 4) located towards the ends of said hinges; where the protruding ends of the rod of the first hinge, are housed inside the elements (Cl 25) of the lower chassis (Cl 2) as a stop and articulation; a third hinge parallel to the second hinge is located at the top, which are separated by vertical and parallel tubes (EST 5 and EST 6); and a fourth hinge parallel to the third hinge is located towards the side of the first hinge; where the third and fourth hinge are separated by horizontal parallel tubes (EST 10 and EST 1 1), giving the conformation of a "C"; The fourth hinge is fixed at the upper ends (EP 4) of the first crosshead. It should be noted that the conformation of "C" can change due to the action of the hinges and the vertical position of the scaffolding. In the upper corners formed by the vertical frame is provided with a hook (EST 8 and EST 9) in each of them, which serve as a stop to prevent the stabilizing system from passing the required opening when the platform is in vertical movement .

The lower front stabilizer system (EID), which avoids the overturning of the scaffolding, is located on the front supports (Cl 9, Cl 10 and Cl 1 1) of the lower chassis, see figure 1. This front stabilizer system consists of: two transversal and contiguous horizontal rails, in each one of them slides a sliding arm (EID 1), which at one of its ends is joined by a idler wheel (EID 3) that makes contact with the floor; where each sliding arm slides in the same direction but in opposite directions one with respect to the other, that is, one towards the right and another towards the left side with respect to the scaffolding (see figure 15); two articulated arms (EID 4 and EID 5), are held between the rail and the sliding arm (EID 1) where one of the ends of the first arm (EID 4) is joined and articulated by means of a screw passed (EID 6) to the support (EID 10) that is welded to the upper face of the sliding arm (EID 1), the other end of the same arm (EID 4) is attached and articulated to one of the ends of the second arm (EID) 5) by means of the last screw (EID 7), the other end of the second arm (EID 5) is attached to a fixed support (EID 11), where said support is located on the rail (Cl 12) at the right end. of said rail and is articulated by means of a past screw (EID 8); in the joint screw (EID 7) is where the driving force that moves the sliding arm is applied, said force is applied by the user by means of a rod (EID 9) that allows to pull or push said joint through the ring (EID) 12), in which an end of the screw (EID 7) is inserted making the arm (EID 1) slide to the right when the screw (EID 7) is pulled up, or the arm slides to the left when the same screw is pushed down; the second stabilizer that slides to the left end of the scaffolding is shaped identically to the first stabilizer, only inverted since the sliding system allows the arm to slide to the left of the scaffold when the screw (EID 7 ) is pulled up, or the arm slides to the right when the same screw is pushed down.

The scaffold comprises at least four protective guards (G) on each side of the scaffolding, where each protective guard is constituted, preferably of a laminar body (G1, G2, G3 and G4) reinforced on its sides by soleras, and means for fastening to the scaffolding such as perforations (G1a, G2a, G3a, G3b, G4a and G4b) at one or both ends, and resaques (G1 b and G2b) at one of their ends. A first protective guard (G 1) figure 16, located on the arm (T 16) of the transmission system, said guard covers the chain (T 2) and assembles the orifice (G 1a) at the central screw of one end. the motor Catarina (T 8) and the other slotted end (G 1b) assemble in the stump of the Catarina (T 10); the guard (G 2) figure 17, is located at the end of the side of the bar (EP 8) and covering the chain (T 4), it is saved (G 2) assembled from one end the hole (G 2a) in the central screw (EP 19) of the Catarina (T 1 1) and the groove (G 2b) assembled in the stump of the Catarina (T 12); the guard (G 3) figure 18, is located on one side of the bar (EP 12) and covering the chain (T 5), said guard joins the hole (G 3b) in the central screw (EP 16) of the Catarina (T 12), and from the other end of the guard the hole (G 3a) assembles in the central screw (EP 10) of the Catarina (T 3); the guard (G 4) figure 19, is located on one side of the bar (EP 4) and covering the chain (T 6), said guard assembles the hole (G 4a) in the central screw (EP 10) of the Catarina (T 13), and the other slotted end (G 4b) assembles in the stump of the Catarina (T 14). All this system of protective guards is to provide greater security to the user avoiding bruises both the user and people close to the scaffolding in addition to protecting their clothing and work tools.

The mobile scaffolding for the disabled works in the following way: the manual transmission system serves to move the scaffolding horizontally and its operation is very similar to that of a conventional wheelchair, only modified with a system of zig-zag chains and sprockets , that allow you to have activated the transmission system at any level in which the upper platform is located, functioning as follows: looking at the scaffolding on the right side, we observe that if we turn the wheel or steering wheel (T1) in favor of the hands of the clock, the scaffold will move forward, and by rotating it in the opposite direction the scaffold will move backwards. To make the scaffold turn on a vertical axis, it is achieved just like a wheelchair, that is, if the upper right wheel (T 1) is braked or stopped by hand so that it does not rotate and rotate its another upper left wheel (T 1 b) the scaffold will rotate on the lower wheel (T 16) depending on the direction in which the upper left wheel is rotated (T 1 b), on the other hand, so that the scaffold turns in the direction otherwise, the upper left wheel (T 1 b) is stopped and the upper right wheel (T 1) is rotated, whereby the scaffold will turn on the lower left wheel (T 16b) either in one direction or in another depending of the direction in which the upper right wheel is rotated (T 1). This is possible thanks also to the idler wheels (Cl 16) and (Cl 17), which, when rotated in a multidirectional manner, help the scaffolding to rotate in any direction.

For the upper platform of the scaffold to move vertically, that is, to rise and fall, it is achieved in the following way: The lever (H 11) of the hydraulic pump (H 2) Figure 7, has three positions, when it is towards up, is when the 3-way, 3-way, ratchet directional valve of Figure 19 is in position "A" and when moving the lever (H 12) of Figure 8, up and down, it feeds the cylinders (H 3) and (H 4) by one of their ends of the piston, of the hydraulic system, whereby being connected to the pantograph-type lifting system allows the platform or upper chassis of the scaffolding to rise when the pistons open the crossarms , when the lever (H 1 1) of the hydraulic pump (H 1) is in the middle, it is when the directional valve of figure 19 is in position "C", in this position the pump is at rest, it is say, you can not raise or lower the top platform of the scaffold, on the other hand, how When the lever (H 1 1) of the pump is in the lower position, it is when the directional valve is in position "B", which feeds the cylinders (H 3) and (H 4) on the other piston end and allows the upper chassis to lower when the pistons close the crossarms.

The reclining and sliding seat works as follows: by moving the lever (A 8) upwards unlocks the ratchet system (A 10) and allows the backrest (A 2) to move in different positions from 70 ° to 170 ° of inclination with respect to the horizontal either with the help of the spring (A 9) or the push of the user; similarly when moving the lever (A 18) when moving it to the right unlocks the pawl (A 21) thereby allowing the entire seat to slide forward or backward according to the needs of the user; the seat rotates on its base (A 25) inserting the bolt (A 26) on the plate (CS 1 1) of the upper chassis, this rotation allows the user to have more work area, this is achieved when the user is driven leaning on Some of the parts of the upper chassis.

The lower front outrigger system (EID) works as follows: The ring (EID 12) of the lever (EID 9) of figure 17, is hooked from the screw (EID 7) of the right front lower stabilizer at the point of connection of the solerails (EID 4) and (EID 5), whereby pulling the lever (EID 9) upwards allows that stabilizer (EID 1) to move to the right, which prevents the scaffolding from being subject to overturning Towards that side, pushing the lever downwards, forces the right front lower stabilizer to get into its initial position, that is, hidden, in the same way when pulling up with the lever to the screw (EID 7b) of the lower left front stabilizer , forces the aforementioned stabilizer to go to the left, which prevents the scaffold from tilting towards that side, similarly, by pushing down with the lever (EID 9) to the screw (EID 7b), the stabilizer aforementioned moves towards the center of the scaffold to remain in the hidden position. The above is facilitated thanks to the system of slices (EID 2) and (EID 2b) that slide internally on the rails (Cl 12) and (Cl 12b) that rest on the lower chassis, and also thanks to the idlers (EID 3 ) and (EID 3b) that allow the stabilizers to make contact with the floor and provide greater stabilization to the scaffolding and greater safety to the user. It should be noted that the stabilizers have a certain inclination towards the center of the scaffolding with respect to the vertical axis, which prevents the stabilizers from getting in when they are outside and are loaded when a rollover is desired.

The "mobile scaffold for the disabled" is made ergonomically for people with disabilities and, it can be presented in two versions, version 1: Without motor since its horizontal displacement is carried out by the human propulsion force of the same user, it is lighter and therefore more economical and more versatile, version 2: Powered by a direct current motor that also requires an accumulator to power the motor and a tungar or battery charger.

Claims (1)

1. CLAIMS Having sufficiently described our invention, we consider as a novelty and therefore claim as our exclusive property, what is contained in the following clauses: 1. A mobile scaffold for disabled people of their lower extremities, characterized in that it comprises: i) a lower chassis (Cl), which in turn comprises a rectangular frame; wherein said frame is formed in turn by four tubular sections; a front tubular section (Cl 1) parallel to the back (Cl 2) of the same dimension, which are joined in corner to two other parallel lateral tubular sections (Cl 3 and Cl 4); in these lateral tubular, in the front towards the outer sides is attached on each side a frame (Cl 5 and Cl 6) that serve as axle holders for the lower pneumatic traction tires (Cl 7 and Cl 8); on the front (Cl 1) of the lower frame has some supports (Cl 9, Cl 10 and Cl 1 1) for the front stabilizers, one front (Cl 12) and another rear (Cl 13), also in the corners of the frame of the chassis where the element (Cl 2 and Cl 3) is joined on the right side and the elements (Cl 2 and Cl 4) on the left side, have two supports (Cl 14 and Cl 15) attached at the bottom , one in each corner, on which a conventional idler or multidirectional wheel (Cl 16 and Cl 17) are mounted on each of them, which serve to give direction and positioning to the scaffolding when it moves horizontally with the traction they will receive the pneumatic wheels through the transmission system based on chains and sprockets; two pairs of plates (Cl 18 and Cl 19) parallel to the lower chassis are joined in the upper front part of the chassis frame in each corner, - which serve as a joint and base for the front support of the first crosshead (EP 5) of the pantograph-type lifting system; in each one of the outer plates of said pair of plates (Cl 18 and Cl 19), is joined a stump (Cl 20 and Cl 21) on which are mounted the fifth pair of fixed double bitters (T 14), of the transmission system, as well as the protective guard (G-4) of one of the transmission chains (T 6); on the upper central part of the front tubular of the chassis are joined the articulated supports (Cl 22) of the upper front stabilizer; in the upper rear part on the side chassis of the chassis near each corner is mounted a rail type support (Cl 23 and Cl 24) where it slides the articulation and base of the rear support (EP 7) of the first crosshead of the lifting system type pantograph; in the upper center part of the rear tubular (Cl 2) of the chassis are joined the articulated supports (Cl 25) of the upper rear stabilizer; ) an upper chassis (CS) comprising a tubular frame, preferably of the material called rectangular, square or round profile; wherein said upper chassis is formed by four tubular sections; a front tubular section (CS 1) parallel to the rear (CS 2) of the same dimension, which are joined in corner to two other parallel side tubular sections (CS 3 and CS 4); In the lower front part of the frame of the upper chassis, at each corner, two plates (CS 5 and CS 6) are joined together which serve as a joint and base for the front support of the third crosshead of the pantograph-type lifting system, in the lower rear of the frame of the upper chassis, on the tubular side of the chassis next to each corner is mounted a rail type support (CS 7 and CS 8) where it slides the articulation and base of the rear support of the third crosshead of the pantograph-type lifting system; at the front it has a base for a seat, which in this case consists of: two sections of tubulars (CS 9 and CS 10), which are welded to the lateral tubulars (CS 3 and CS 4) of the upper chassis, on which is welded a drilled plate (CS 1 1) on which a pivot of the folding seat (A) rests and rotates; Near the central part of the chassis and on the upper face of the side tubes are welded two tubular supports in the form of an inverted "L" (CS 12 and CS 13), leaving the horizontal portion of the "L" towards the outside of the chassis, in such a way that they serve as support for the braking system of the upper wheels or transmission wheels (T 1 and T 1 b); next to the central part of the upper chassis has another tubular section (CS 14) welded to the two lateral ends of the chassis and on which rests a pump of the hydraulic system (H 2); in the central part of the upper chassis is a transverse vertical frame that supports the upper wheels (T 1 and T 1 b), which is formed by two triangular columns (CS 15 and CS 16), one on each side of the frame of the chassis and a support bar (CS 17) is fixed on each of the vertices of said triangular columns; a piece in the shape of "T" (CS 18) is fixed inclined to the support bar (CS 17), said piece in the form of "T" serves as support for the handles of the drive of a conventional bicycle braking system to control the top wheels. However, this brake system can be replaced by a conventional braking system for wheelchairs, which would eliminate the piece in the shape of "T" (CS 18), which would be mounted directly on each of the supports in the form of "L" inverted (CS 12); ) a pantograph lift system (EP), which is made up of at least one pair of crossarms; where each crosspiece is constituted by an external arm (EP 4) and an internal arm (EP 6) joined together in their middle part by a screw passed with a nut (EP 9) that allows the articulation of said arms. The crosshead (EP 1) joins the upper front support of the chassis (Cl 18) by means of a hinge system articulated by means of one screw passed (EP 5) and the other arm (EP 6) is attached to the upper rear support (EP 7) of the chassis with the same hinge system, but joined to the train of bearings (EP 8) that slides on the rail type support (Cl 23). The upper ends of the arms (EP 4 and EP6) are joined by an articulated hinge system by means of the last screws (EP 10) and (EP 1 1) to the lower ends of the arms of the intermediate crosshead (EP 2); V) a hydraulic system (H) which has a manual pump (H 2) of directional valve of four-way and three positions with ratchet, of the commonly known, which is mounted on the tubular section (CS 14) of the upper chassis, through the last screws (H 12, H 13 and H14); two double-acting cylinders (H 3 and H 4) (hydraulic jacks) and connecting hoses (H 7, H 8, H 9 and H 10); where the lower part of the lower hydraulic jack (H 3) is coupled in an articulated manner by means of a past screw (H 15), to a frame (H 16) that rests on the internal faces of the internal bars (EP 6) of the first crosshead of the pantograph lift system, said crossarms go one on each side of the scaffolding; the upper part of the lower hydraulic jack is mounted and articulated by another screw (H 17) to another frame made of tubular material (H 18) which is attached to the internal faces (EP 13) of the second crossarms of the lifting system type pantograph; the upper hydraulic jack (H 4) is mounted and articulated in the lower part by means of a screw (H 19) to the same frame (H 18) of the upper end of the lower jack, which is supported on the internal face (EP 13) of the same second crosshead of the pantograph-type lifting system, and the upper part of the upper jack is assembled and articulated by means of a screw (H 20) to another frame (H 21) made of tubular material that is attached to the internal faces (EP 17) of the third crosshead of the pantograph-type lifting system; v) a transmission system (T) which is made up of at least one pair of steering wheels (T 1), four pairs of chains (T 2 to T 7), a pair of upper single shanks (T 8) , a pair of lower simple sprockets (T 9), a pair of intermediate double sprockets (T 10 to T14), two pairs of arms for distance adjustment (T 16 and T17) and a pair of pneumatic wheels (T 15). Where the drive wheels (T 1) are placed on top of the upper chassis (CS) of the scaffold; the main motor sprockets (T 8) are located between the steering wheels and the upper chassis, mounted on the axle of said steering wheel (T 1) both pieces forming a single entity and are mounted on the column (CS 15); a first arm (T 16) is attached to the axis of the drive wheel (T 1), in an articulated manner; whose free end is joined to a second arm (T 17), also in an articulated manner, which in turn its free end is joined at the center point of the upper crosshead (EP 3); the first floating double catarina (T 10) is located at the junction of the two arms (T 16 and T17) of the distance adjustment motor system, this Catarina (T 0) is connected on one side to the motor catarina (T 8) ) by means of a chain of transmission (T 2), and on the other hand, to the second fixed double Catarina (T 1 1) by means of another chain (T 3); the Catarina (T 1 1) is located in the central part of the outer face of the outer bar (EP 18) centered by the screw (EP 19) of the third crosshead; these three ladybugs, the main motor catarina, the first floating double catarina and the second fixed double catarina (T 8, T 10 and T 1 1 respectively), and the chains that join them are part of the motor distance adjustment system; the continuous transmission system of the second fixed double Catarina (T 1 1) to the third fixed double Catarina (T 12) by means of another transmission chain (T 4), this third double Catarina (T 12) is located in the center of union of the outer bars (EP 18 and EP 12) where the last screw (EP 16) of the third and second cross braces (EP 3 and EP 2) is located; the continuous transmission system of the third fixed double Catarina (T 12), to the fourth fixed double Catarina (T 13) by means of another transmission chain (T 5), this fourth double Catarina is located in the center of union of the bars exterior (EP 12 and EP 4) where the last thyme (EP 10) of the second and first crossheads (EP 2 and EP 1) is located; the continuous transmission system of the fourth fixed double catarina (T 13) to the fifth fixed double catarina (T 14) by means of another transmission chain (T 6), this fifth double catanna is located in the center of union of the outer bar (EP 4) where the last screw (EP 5) of the first crosshead (EP 1) is located with the lower chassis (CS) of the scaffold; the continuous transmission system of the double Catarina (T 14) by means of another transmission chain (T 7) towards a Catarina (T 9) that is mounted on the axis of the lower pneumatic wheel (T 15) forming both a single entity which is mounted on the right side at the front of the lower chassis on the support frame of the wheel (Cl 5); being found on the left side another identical system as a mirror to provide between both systems the horizontal movement and rotation of the scaffolding; ) an ergonomic sliding seat, reclining and folding (A), commonly known in vehicles, which are usually folding, sliding, reclining and have a headboard on the upper part of the backrest which is foldable and adjustable (A 3 ); wherein said ergonomic seat comprises in its support base a plate (A 22), supported in the central part of the frame that forms the support base (A 15 and A 23); a stem (A 20) is fixed vertically in the lower part of the plate (A 22), which is inserted, by its lower end, to the plate (CS 11) of the upper chassis, it should be noted that the stem has a diameter which allows it to enter said plate (CS 11) but allowing it to rotate on its own axis; a leg rest (A 16) is inserted in each lateral tubular element (A 15) of the base support of the seat which are fixed through fastening means such as butterfly screws (A 17) among others, but which allow to adjust the length of the leg portion (A 16) that is inserted into the lateral tubular elements (A 5); at each lower end of the leg post it has an articulated foot post (A 24) which is attached to the leg post by means of a hinge that allows it to articulate, providing more space for the user's access to the seat (A); and securing means for a safety belt (A 4), assembled in one of the upper and lower ends of the backrest; ii) a support system for a tool rack (P) on the upper rear part of the upper chassis (CS), which is a series of at least four tubular supports (CS 19-a, CS 9-b, CS 19-c and CS 19-d) in a vertical position, on which the tubular legs of the tool rack are inserted. The support system for the tool rack is it forms a platform similar to the base of the seat support, with a rotating shaft, on which said tool holder grill is placed; ii) a tool rack (P) that is formed by a table (P 2), in each of its corners is placed a tubular past (P 4-a, P 4-b, P 4 c and P 4-d) , wherein said tubular passages are introduced at their lower end into the tubular supports (CS 19-a, CS 19-b, CS 197c and CS 19-d) of the upper chassis; where the surface (P 5) of the table (P 2) can be made of different materials; ) a front upper stabilizer system (ESD) which is located in the front of the scaffolding above the lower chassis (Cl 1), said stabilizer system is made up of at least two sets of frames, each set articulated independently of the other, by means of a hinge in each union of the frames; the first frame is made up of the arms (ESD 2 and ESD 3) and the tubular ones (ESD 1 and ESD 4); the first hinge is located on the front of the lower chassis (Cl 1) allowing the articulation between the first frame of the stabilizer system and the lower chassis; the protruding ends of the rod of said hinge, are housed inside the elements (Cl 22) as a stop and articulation; the tubular (ESD 4) serves to form a second hinge, for which, inside the rod is housed (ESD 16), allowing the union and articulation between the first and second frame, said rod of the second hinge, has in its ends a stop (ESD 25 and ESD 26) to prevent it from coming out of the joint; on the rod of the second hinge, the arms (ESD 5 and ESD 6) of the second frame pivot next to their ends, therefore, said second frame is formed by the second hinge, the arms (ESD 5 and ESD 6) and a third hinge, whose rod (not illustrated in Figure 13) is housed inside the tubular (ESD 7), which pivots on said rod not shown; at the ends thereof, two lengths of tube (ESD 22 and ESD 23) are inserted, which are welded to the front joint of the arms (EP 6) joining the first and second crossheads of the lifting system. Of equal in a second pair of frames, articulated and shaped in the same manner as the first set of frames, is formed by a third frame constituted by a fourth hinge, the arms (ESD 9 and ESD 10) and the fifth hinge; the fourth hinge is located on the arms (EP 13) of the pantograph-type lifting system allowing articulation between said system and the third frame; the protruding ends of the rod of the fourth hinge, are housed inside the elements (ESD 20 and ESD 21) as a stop and articulation; The tubular (ESD 1 1) serves to form a fifth hinge, for which, inside the rod is housed (ESD 17), allowing the union and articulation between the third and fourth frame, the rod of the fifth hinge, has at its ends a stop (ESD 27 and ESD 28) to prevent it from leaving the joint; on the rod of the fifth hinge, the arms (ESD 12 and ESD 13) of the fourth frame pivot next to their ends, therefore, said fourth frame is formed by the fifth hinge, the arms (ESD 12 and ESD 13) and a sixth hinge, whose rod (not illustrated in Figure 13) is housed inside the tubular (ESD 14); the ends of this rod, two sections of tube (ESD 18 and ESD 19) are inserted, which are welded to the front joint of the arms (EP 12) that join the second and third crossbar of the elevator system; The rear upper stabilizer system (EST) is located on the back of the scaffolding above the lower chassis (Cl), and is made up of three frames articulated one after the other, by means of hinges, forming a kinematic chain; a first horizontal frame formed by two hinges parallel to each other and separated by two parallel arms (EST 3 and EST 4) located towards the ends of said hinges; where the protruding ends of the rod of the first hinge, are housed inside the elements (Cl 25) of the lower chassis (Cl 2) as a stop and articulation; a third hinge parallel to the second hinge is located at the top, which are separated by vertical and parallel tubes (EST 5 and EST 6); and a fourth hinge parallel to the third hinge is located towards the side of the first hinge; where the third and fourth hinge are separated by horizontal parallel tubes (EST 10 and EST 11), giving the conformation of a "C"; The fourth hinge is fixed at the upper ends (EP 4) of the first crosshead. It should be noted that the conformation of "C" can change due to the action of the hinges and the vertical position of the scaffolding. In the upper corners formed by the vertical frame is provided with a hook (EST 8 and EST 9) in each of them, which serve as a stop to prevent the stabilizing system from passing the required opening when the platform is in vertical movement . ) a lower front stabilizer system (EID), which prevents the overturning of the scaffolding, is located on the front supports (Cl 9, Cl 10 and Cl 1 1) of the lower chassis; said forward stabilizing system is made up of: two transverse and contiguous horizontal rails, which in each one of them slides a sliding arm (EID 1), which at one of its ends is joined by a idler wheel (EID 3) that makes contact with the floor; where each sliding arm slides in the same direction but in opposite directions one with respect to the other, that is, one towards the right and another towards the left side with respect to the scaffolding (see figure 15); two articulated arms (EID 4 and EID 5), are held between the rail and the sliding arm (EID 1) where one of the ends of the first arm (EID 4) is joined and articulated by means of a screw passed (EID 6) to the support (EID 10) that is welded to the upper face of the sliding arm (EID 1), the other end of the same arm (EID 4) is attached and articulated to one of the ends of the second arm (EID 5) by means of the past screw (EID 7), the other end of the second arm (EID 5) is attached to a fixed support (EID 1 1), where said support is located on the rail (Cl 12) at the right end of said rail and is articulated by a screw passed (EID 8); in the joint screw (EID 7) is where the driving force that moves the sliding arm is applied, this force is applied by the user through a rod (EID 9) that allows pull or push said articulation through the ring (EID 12), in which one end of the screw is inserted (EID 7) making the arm (EID 1) slide to the right when the screw (EID 7) is pulled up, or said arm slides to the left when the same screw is pushed down; the second stabilizer that slides to the left end of the scaffolding is shaped identically to the first stabilizer, only inverted since the sliding system allows the arm to slide to the left of the scaffold when the screw (EID 7 ) is pulled up, or said arm slides to the right when the same screw is pushed down; xii) at least four protective guards (G) on each side of the scaffold, where each protective guard is constituted, preferably of a laminar body (G1, G2, G3 and G4) reinforced on its sides by solerails, and means for fastening to the scaffolding such as perforations (G1a, G2a, G3a, G3b, G4a and G4b) at one or both ends, and resaques (G1 and G2b) at one of their ends; Y xiii) a braking system of those commonly known in conventional wheelchairs. The scaffolding of claim 1, characterized in that it comprises an intermediate pair of crossarms (EP 2). The scaffolding of claims 1 and 2, characterized in that it comprises an upper pair of crossarms (EP 3), arranged on the lateral sides of the scaffold. The scaffold of the previous claims, characterized in that the tool rack (P) additionally comprises a protective handrail formed by a frame (P 1) with the same shapes and dimensions as those of the grill and a leg (P 3-a, P 3-b, P 3-c and P 3-d) is placed in each corner of said upper frame (P 1), where said leg has a dimension that allows it to be introduced to the tubular legs (P 4-a, P 4-b, P 4-c and P 4-d) give the grill, which join one inside of the other until reaching the stops (P 6) located externally in the middle part of each leg (P 3-a, P 3-b, P 3-c and P 3-d) of the guardrail, in such a way that said guardrail can be put on or taken off. 5. The scaffold of the preceding claims, characterized in that it comprises an electric motor.