FOLDABLE MOBILE BED AND PORTABLE FOR USE IN INDUSTRIAL WORK AND MECHANICAL-AUTOMOTIVE. FIELD OF THE INVENTION. The present invention will be directed towards the automotive sector and refers to a folding and portable mobile bed, to be used in industrial and automotive mechanical work, as well as search, repair and maintenance activities that require it. OBJECT OF THE INVENTION. It was observed that in the automotive and industrial sector there are a number of difficulties with access to limited spaces. The proposal is made for a mobile, foldable and portable bed, which has been designed to solve this problem, has characteristics of durability, storage, transfer and handling that optimize its operation and that conventional analogue devices do not present. BACKGROUND The conventional analogue models manufactured and used for the purposes described above have a significant spatial problem in terms of storage, transfer and handling, as well as durability, in addition to being manufactured with perishable materials such as wood and fibreboard derived from the wood whose duration is uncertain, not guaranteed and also warn of a serious ecological problem, requiring repairs and solutions improvised empirically or their total replacement, or, made with heavy materials such as tubular profiles and metal laminates. As an indirect background of objects and apparatuses, with the characteristics of utility, functionality and causality proposed by the foldable and portable mobile bed, two utility patents can be mentioned and described: The U.S. patent application. 2004/0245733 discloses a trolley with a loading platform, adapted to move in a horizontal direction and parallel to the longitudinal axis of the apparatus by means of folding wheels mounted respectively to the platform by a fork and a rotating support that deploys a pole with a handlebar that It serves to pull the platform in the desired direction. Each fork is insurable in an ideal position of use by describing a perpendicular with respect to the platform and at least one folded position parallel thereto. U.S. 2004 / 6,733,026 Bl presents a folding cart for general use that folds into a compact shape for ease of transport and storage. The wheels are typically mounted to the underside of the bed by shelves, with the front wheels usually attached (connected) to a handle that extends and is mounted to steer it. It can be easily transported in small vehicles. The U.S. patent application 2000 / 006009587A, presents a bent ramp in which at least two of the members of the ramp rotate together. The lower surface of the ramp has a variety of bars or rods that are part of the pivot mechanism (rotary movement) and that, in addition, add strength and structural rigidity to the ramp. The foldable and portable mobile bed that is presented, has been conceived to solve this problem in a satisfactory way, since in my invention I am incorporating a folding frame with two arms or links, each with a fork at each end, and two other arms smaller with a washer at the ends of each, joined together intercalary by four bolts that house, respectively, the poles of the forks of the four wheels with which the bed moves on a work surface, radially articulated so that the rotation between these links is limited to 90 °. They also consist of three stackable and foldable boards or planes, which serve as a platform for the user, and which are articulated in a very similar way to the action of a bellows, by four double-bolt hinges, and which as a whole are attached to the frame. by a pair of unitary single-bolt hinges that are part of a link; These boards are characterized by being of different size: two laterals of equal dimension and a longer central one, which protrudes at one end of the frame formed by the frame and incorporates a pad where the user's head will rest.
These characteristics give the invention two different dimensions and, therefore, two positions: a utilitarian position, when the apparatus is in an optimal position for its use, the links form a rectangular frame and the boards that make up the platform where the user will rest are deployed; and a compact position, when the invention is folded, saving up to 65% of the space occupied by the same apparatus in the deployed position or other conventional analogue, this position optimizes the storage of the device in spaces where no conventional apparatus would take place, as in lockers, shelves and cabinets, for example, and the transfer in private motorized vehicles and of public service in luggage racks, baskets, platforms, etc. To complement the explanation and description of the characteristics of the invention, a series of illustrative and non-limiting technical drawings are included in this document, since the foldable and portable mobile bed, described and specified in these drawings, shows an exemplification of one of The multiple manufacturing processes that the device can have, the process of plastic injection molding. BRIEF DESCRIPTION OF THE FIGURES Figure 1 shows a top view of the folding portable bed, in which its elements are deployed in operative position. Figure 2 is a bottom view of the invention. Figure 3 is a right side view of the apparatus. Figure 4 is a front view of the invention. Figure 5 shows the left side view of the appliance in a utilitarian position. Figure 6.- is a top perspective of the frame, formed by the four links, the elements that work as poles that articulate and join the arms, and the forks with the wheels and their respective anchors; in this figure encloses the segment of the frame to be shown in detail by means of an exploded view. Figure 7 shows a detail in perspective top of the exploded view of one of the joints in a segment of the frame. Figure 8 shows a detail in lower perspective, of the segment specified in figures 6 and 7, of the articulated elements of the articulation and the insertion of the post with the fork of the wheel. Figure 9.- is a top view of the frame; it shows the descent of this and encloses the segment to be observed in detail, showing the geometry of the system of locks on the forks and washers that limit the rotation between links, with reference to figure 3. figure 10.- shows the detail of the cut of a segment of the frame, where the geometry of the locks in the forks and rings of the links that limit their rotation to 90 ° when the frame is folded is appreciated. Figure 11 shows the detail of the section cut of the frame specified in figure 10, with the geometry and position of the locks when the apparatus is in deployed and operative position. Figure 12 is a front view of the invention where its dimension, position and shape is shown when the elements that comprise it are folded. Figure 13 is a front view of the apparatus with its deployed elements in which its dimension is shown in direct comparison with Figure 12. Figure 14 shows a left side view of the invention when its elements are deployed. Figure 15 shows a left side view of the apparatus when its elements are folded.
Figure 17.- is a top view of the invention when it is in folded position. Figure 18 is a top view showing the dimension of the invention in a utilitarian position with respect to a human scale using the apparatus. Figure 19 is a front view showing the dimension of the invention in operative position with respect to a human scale using the apparatus. Figure 20 shows a top perspective of the invention in folded position. Figure 21.- is a top perspective the apparatus where the first procedure to display it is shown. Figure 22 shows a top perspective of the invention in which the folding of the frame is represented. Figure 23 is a top perspective of the apparatus where the frame is deployed in operative position forming a perfect rectangular frame. Figure 24 .- is a top perspective of the invention where it shows the abatement of the boards that make up the platform where the user will rest and the procedure to articulate them. Figure 25 .- is a top perspective of the apparatus where the anchoring of the planes of the platform is shown by the insertion of the heads of the posts of the articulations of the frame to the corresponding cavities of the boards, eliminating any game or movement of these and the frame. Figure 26 shows a top perspective where the boards that make up the platform are deployed and fixed in the frame, so that the device is in operational position. In this figure the segment to be observed in detail is enclosed by an exploded view of the elements of the articulations of the boards. Figure 27.- is a detailed view of an exploded view of the elements of the joints where the three panels can be seen and a hinge with its two bolts, as well as the cavities and holes where they make their insertion. DETAILED DESCRIPTION OF THE INVENTION The foldable and portable mobile bed was conceived to optimize the durability, storage, transfer and manipulation presented by its conventional analogs, since among its various qualities it can be mentioned that it has the capacity to be manufactured at small, medium or great production by various methods and processes such as metal casting in multiple materials and alloys, as well as the injection molding of different plastic compounds, or the molding and baking of plastic fibers and conventional and epoxy resins. The foldable and portable mobile bed incorporates an articulated and foldable frame 1 (FIGS 6 and 9) formed by four arms or links of the same depth but different length: two small and equal arms that act as crossbars 2 and two larger arms of twins extension acting as stringers 3. In the crosspieces 2, washers 4 are incorporated in each of the inner edges of their polar ends (FIG 7), while the stringers 3 incorporate in the same arrangement a pair of forks 5 per arm (FIG 7); each of these forks 5 house the washers 4 of the crosspieces which, with the assistance of a post or bolt 6 (FIGS 7 and 8) and the links being arranged and arranged intercalately (crossbar 2-crossbar 3-crossbar 2-crossbar 3-crossbar 2) (FIGS 6 and 9) articulate the assembly, giving it the ability to be foldable (FIGS 9, 22 and 23), describing a radial turn between crossbars 2 and stringers 3 (FIGS 10, 11 and 22). ), and a parallel spacing between links of the same type (FIGS 9, 22 and 23).
These joints, totaling four in total, are achieved thanks to a binomial formed by a semi-hollow post 6 with an inner cord that houses a screw 7 found (FIG 7), which loosely press the washers 4 with the forks 5 (FIG. ). This screw 7 has the peculiarity of having an inner cavity 8 (FIG 8), which receives under pressure an insert post 9 with a padlock 10 in the upper part that is attached to a fork 11 with a wheel 12 (FIGS. and 8) which describes an eccentric orbit, unlimited and free in both directions at 360 ° to the vertical axis of rotation of the post and the screw. This wheel 12 is multiplied in order to the number of articulations of the frame (FIG 6), four in total, so that as a whole they make the apparatus slide on a work surface in an indefinite and infinite direction (FIG. ). In addition, these articulations have elements arranged in such a manner (FIGS 10 and 11) that limit the radial rotation between the longitudinal axes of the arms 2 of the frame 1 to 90 ° (FIG 23), since the washers 4 of FIG. the crosspieces 2 incorporate protuberances 13 integrated formally and radially to these (FIG 6) that lodge and move inside cavities 14 in the forks 5 of the longitudinal members 3 (FIG 6) that guide these obstacles 13 to the rotation of the links (FIGS 10 and 11). The arrangement of these elements causes the wheels 12 and the joints to be on the same longitudinal axis when the frame 1 and the apparatus itself are folded (FIGS 17 and 21); this makes the stringers 3 count on their lower faces, with cavities 15 (FIGS 2, 6, 9 and 22) that receive the components of the corresponding joints and resulting from the rotation of the opposite joints (FIGS 9 and 22) . Likewise, the beams 3 have the peculiarity that their faces and upper planes 16 (FIG 6) are smaller in dimension with respect to the lower ones, in order to receive and couple the upper faces and planes 17, and the reinforcement ribs 18 which structure the crosspieces 2 (FIGS.10 and 11), since these faces 16 are the transverse supports on which the articulated and foldable boards 19 (FIGS. 24 and 25) rest, which form the platform where the user will rest (FIGS. and 19). It should be noted that both the crosspieces 2 and the 3 stringers proposed have ribs 18 that structure them (FIGS 6, 10 and 11), which will be ordered and arranged according to the material with which the device is manufactured, responding to costs of production and the desired strength of the apparatus, therefore, the ribs 18 described in the drawings are merely an exemplification. For its part, the platform is made up of three boards (FIGS.1 and 2): two laterals 19 of the same shape, size and characteristics, and a central 20 of greater length. The side panels 19 are characterized by being completely flat on their upper face (FIG 1) and having semicircular protuberances 21 (FIGS 1 and 15) that stand out formally at their polar ends adjusted to the longitudinal axes of the boards 19. Each boss 21 has a cavity 22 in the lower face (FIGS 2 and 21), opposite the blank face, which receives perfectly the head of the post 6 of the corresponding joint (FIGS 24 and 25). Also, each of these boards has another cavity 22 (FIGS 2 and 21) on the same longitudinal axis, which houses the head of the post 6 of a hinge of a crossbar 2 (FIG 21) that eccentrically orbits the action of the pivot that represents the other articulation of this link 2 when the frame 1 is folded (FIG 9). Likewise, the central panel 20 has an end 23 that protrudes from the frame formed by the frame 1 in the deployed and utilitarian position (FIGS.1, 2 and 4) and which corresponds ergonomically and anatomically to the dorsal, lumbar and gluteal regions of the user (FIGS. FIGS 18 and 19). This protruding end 23 then corresponds to the cervical region and head of the operator and is characterized by having a pad 24 on its flat face (FIGS 18 and 19) which will provide comfort to the user in these specific areas. In addition to these characteristics, the board 20 incorporates a skirt 25 on its lower face (FIGS.
and 21) partially enclosing this projecting end 23 and forming part thereof, which will serve together with the cavities 22 of the semicircular protuberances 21 of the side panels 19 (FIG 21), to fix and rest the planes 19 that make up the platform to the frame 1 (FIGS 25 and 26), specifically to the heads of the bolts 6 that articulate the links 2 and the upper faces 16,17 of these arms 2 in order to avoid any play or movement between the elements, which attends against the correct performance of the device (FIG 26). In addition, these three boards 19, 20 individually have two cavities 26 separated in each of their lateral edges (FIGS 20 and 27), that is, four per board, which are provided with holes 27 in each of their internal flanks against the face (FIG 27). These cavities 26, together with the holes 27, house a double-pin hinges 28,30 '(FIG 27) that articulate the boards 19, 20 when assembled (FIG 24). Each hinge 28 has two holes 29 arranged longitudinally (FIG 27) that are radial to the bowed edges, each receiving a bolt 30, which is received in turn by the holes 27 of the cavities 26 of the boards 19, 20 (FIG 27); this will result, by working together the boards 19, 20, the hinges 28 and the bolts 30 in a random jointed motion that will cause the boards 19, 20 to fold and stack on top of each other in a manner very similar to the action of a bellows (FIGS 20 and 24) on a link 3 of the frame 1 to which they are linked and articulated by a pair of integrated unitary hinges 31 (FIG 6) with solitary bolts 30 which are also received by the holes 27 found in the cavities 26 of a side board 19 (FIG 26). It should be noted that the board 19 contrary to the plane 19 'articulated to the frame
1, incorporates a tongue or tang on its face farthest from the described fulcrum
32 (FIGS 1, 2 and 26) that acts as a handlebar for manipulating the boards 19 in folding and unfolding (FIGS 24 and 25). Likewise, the reinforcing ribs 33 (FIG.24) described in the drawings are purely an example of the structuring that the boards 19, 20 of the platform of the apparatus could have, according to the material, the manufacturing process and / or the objectives that are wanted to reach on the part of the manufacturer.