WO2005106180A1

WO2005106180A1 - Adjustable ladder comprising movable steps or bars

Info

Publication number: WO2005106180A1
Application number: PCT/MX2005/000026
Authority: WO
Inventors: Marisela Rojas Arriaga
Original assignee: Marisela Rojas Arriaga
Priority date: 2004-05-03
Filing date: 2005-04-19
Publication date: 2005-11-10
Also published as: MXPA04004217A

Abstract

The invention relates to ladder-type means comprising transverse steps, which are used to raise and/or lower people and/or loads. More specifically, the invention relates to an adjustable ladder which comprises movable steps or bars and which can be fixed and/or assemblable/disassemblable. The inventive ladder is equipped with a means for adjustably fixing same at the corresponding area, consisting of four angle pieces which are connected in pairs, comprising a bearing which is intended to rest against the wall. According to the invention, a series of holes is provided on both arms for the preferably-aligned insertion of a bolt and nut, in order to fit the ladder correctly to the corresponding fixing area. Moreover, two lateral supports project out from the lower face of the above-mentioned bearing-equipped angle pieces. The lateral supports comprise a central groove on the inner face thereof, in which the lateral projections from the movable steps or bars are inserted, a reinforcing element for providing stiffness, and non-slip stop elements which are inserted into the cavities at the ends of said lateral supports.

Description

SCALEUS-RÁ ADJUSTABLE WITH SLIDES OR MOVABLE BARS

FIELD OF THE INVENTION

The present invention is related to the means used for ascending and / or descending people and / or loading materials. The present ladder is referred to facilitate the ascent and / or descent of the user even when transporting cargo or only materials and offering greater safety by reducing their efforts and expanding the advantages in the use that a conventional ladder can provide.

BACKGROUND OF THE INVENTION

At present, the stairs of the type of supports with conventional transverse steps, require for their correct operation and safety to be adequately supported against the wall or wall where the user makes an effort to ascend and / or descend. In addition, these ladders currently limit their use of ascent and / or descent considerably when the user carries a load due to their need to hold on to it.

As it can be observed, the limitations and disadvantages of the stairs with conventional steps is the insecurity during its use and the effort of the user when ascending and / or descending and even more when carrying a load when making use of such stairs. OBJECTIVES OF THE INVENTION

The solution consists of the present staircase and its means that conform it because it provides security when fixed to the wall or wall and facilitates its use by having movable steps in addition, a clamping mechanism adjustable to the viable area to be applicable to other structures. , etc. and the means that comprise it can be operably associated with any structure of apparatus, utensil, object, tool or machine whether hydraulic, electrical and / or mechanical and / or combined with each other, as exemplified by some figures that allow alternative uses are presented as an example a ladder with fixed rungs and its application of said adjustable fastening means to the area therein.

Other objectives and advantages of the present invention may be apparent from the study of the following description and the accompanying drawings for illustrative and non-limiting purposes only.

BRIEF DESCRIPTION OF THE INVENTION

In general, the adjustable ladder with steps or movable bars is composed of an adjustable clamping mechanism consisting of "L" -shaped arms that can be coupled in pairs, four angles, an angle of each pair comprises a perforation in one of its arms , while the other angle of each pair comprises more than one perforation for the corresponding adjustment, each pair of angles cooperating in a sliding way and being hooked and fixed by a clamping means when said perforations coincide as required. From each pair of angles, one of them, the one that is outward, comprises bearings of rubber at the bottom of the angles for resting against the wall or wall. In said angles comprising bearings, two lateral supports or rods for travel are projected, which are projected inferiorly, with a groove in their corresponding internal face through which a step or movable bar slide along its ends. Said travel bars internally comprise a crane-like mechanism for the ascent and / or descent of said steps or bars, consisting of the steps or bars with freedom of movement, which have a central body and lateral projections or axes and guides at their ends inserted in a guide element or longitudinal rail disposed in the internal part of the groove of said rods that carry an insert or graft for the control of the sliding of said movable steps or bars. Said travel bars have upper and / or lower reinforcements or bars that serve as reinforcement to prevent their deformation and rest against the wall or wall, in addition to plate-shaped caps in the gaps of their four ends of which the placed at the bottom are non-slip. Its parts that make it up can be movable and removable as long as its length is determined as required and can carry a mechanism of ascent and / or descent of steps or bars and transverse bars.

To better understand the characteristics of the aforementioned invention, the present description, as an integral part thereof, is accompanied by illustrative drawings, but not limited to, which are described below.

BRIEF DESCRIPTION OF THE FIGURES Figure 1 shows a perspective view of a lateral support mechanism showing two of its lateral supports, a reinforcement mechanism for its stiffness and / or rest against the wall or wall, two transverse bars that cooperate for the movement of said lateral supports and handles and an adjustable clamping mechanism to the area where a ladder is to be fixed.

Figure 2 is a perspective view of two sections of said side supports coupled on the same ladder

Figure 3 shows a front view of a step or bar mechanism of a ladder.

Figure 4 is a front section of the first pair of sections of said lateral supports showing an ascent and / or descent mechanism of steps and / or bars and a step or bar mechanism of the same ladder.

Figure 5 illustrates a cross-section of two sections of said lateral supports of the same ladder.

Figure 6 illustrates an adjustable ladder with movable steps or bars, showing a lateral support mechanism, reinforcement mechanism for resting against the wall or wall and / or its stiffness, a step or bar mechanism, and an adjustable clamping mechanism to the area where the referred ladder is to be fixed.

Figure 7 illustrates an adjustable ladder and step or bath control Rare, it shows a lateral support mechanism, reinforcement mechanism to rest against the wall or wall and / or its stiffness, a mechanism of ascent and / or descent of steps and / or bars, a step or bar mechanism, and a mechanism Adjustable clamping to the area where the same ladder is to be fixed.

Figure 8 illustrates an adjustable ladder with control of steps or bars and handles showing a lateral support mechanism, a reinforcement mechanism for resting against the wall or wall and / or its rigidity, a step or bar mechanism, a mechanism of ascent and / or descent of steps and / or bars, handles, and a mechanism of subjection adjustable to the area where the same ladder is to be fixed.

Figure 9 illustrates an adjustable ladder and handles, shows a lateral support mechanism, a reinforcement mechanism for resting against the wall or wall and / or its stiffness, a step or bar mechanism, handles, and a clamping mechanism adjustable to the area where the same ladder is to be fixed,

Figure 10 illustrates an adjustable ladder and movable supports with handles, shows a lateral support mechanism, a reinforcement mechanism for resting against the wall or wall and / or its stiffness, a step or bar mechanism; handles; two crossbars that cooperate for release and / or collection of their support sections and handles; and a clamping mechanism adjustable to the area where the same ladder is to be fixed.

Figure 11 illustrates an adjustable ladder and movable supports with Trolling of steps showing a lateral support mechanism, a reinforcement mechanism to rest against the wall or wall and / or its rigidity, a step or bar mechanism, a mechanism for ascending and / or descending steps and / b bars; two crossbars that cooperate for the release and / or collection of its support sections, and an adjustable clamping mechanism to the area where the same ladder is to be fixed.

Figure 12 illustrates an adjustable ladder showing a ladder with fixed transverse steps, a means of reinforcement for resting against the o-wall and / or its rigidity, and a clamping mechanism adjustable to the area where it is going to Fix it.

For one. better understanding of the invention, the detailed description of some of the modalities thereof will be shown, shown in the drawings which, for illustrative but non-limiting purposes, are attached to this description.

DETAILED DESCRIPTION OF THE INVENTION

The characteristic details of the present adjustable ladder with movable steps or bars are clearly shown in the following description and in the accompanying illustrative drawings, the same reference signs being used to indicate the same parts to which reference is made.

Making, reference to figure 1 showing a perspective view of a lateral support mechanism showing two of its lateral supports, a reinforcement mechanism for its rigidity and / or resting against the wall or wall, two transverse bars that cooperate for the movement of said lateral supports and handles and an adjustable clamping mechanism to the area where the same ladder is to be fixed. In relation to the aforementioned figure, said ladder is composed of a clamping mechanism adjustable to the width of the surface on which it will be adapted, either in a wall, window, etc., formed by at least one pair of arms or angles , preferably four angles in the form of "L" (No.2), attachable in pairs, which can be of aluminum or any other material with appropriate mechanical properties, an angle of each pair has at least one perforation in one of its arms (No.14), while the other angle (No.2) of each pair comprises more than one series of perforations (No.12) for adjustment, which in the example of practical realization represented in the figures are three perforations (No.12) and a perforation (No.14), but whose number may vary further, the shape of its arms (No.2) can be in curved form or any other viable form and said adjustable clamping means can be operably associated to a machine, tool, device, object or utensil and be it mechanical, hydraulic and / or electrical, without affecting the essence of the present invention, each pair of said angles (No.2) cooperating in a sliding manner in their corresponding perforated arms and being fixed by a suitable fastening means, when these perforations coincide (Nos. 14 and 12), as required. Each angle (No.2) facing the outside comprises supports or bearings (No.13) that can be made of rubber or any other material with appropriate mechanical properties, located in the lower part of said angles (No, 2) for rest against the wall or wall. These angles (Nos. 2) are conformed with a Yor width and thickness in comparison to the other elements of said ladder since in that place the majority of the effort generated during the normal use of said ladder is concentrated. The adjustment of said adjustable fastening means will preferably be made with a screw and a nut placed in the perforations (Nos. 12 and 14) coinciding with said angles (Nos. 2) which in the example of practical embodiment is a screw and a nut but it can be any other suitable fastening means such as a hook-shaped eyebrow instead of perforations in both arms so that they are hooked and present said bearing (No.13) in any way, without thereby affecting the essence of The present invention. Said adjustable fastening means can be fixed by any type of suitable or removable welding and mountable to the structure in question by any suitable fastening means, preferably at least one screw with its nut, so in the embodiment example ^' The practice shown in the figures is fixed but can be removable and assembled or not carried in the structure in question, without affecting the essence of the present invention. In said angles (No.2) comprising supports or bearings (No.13), a lateral support means, which can be made of aluminum or any other material with appropriate mechanical properties, which can be fixed by any fastening means are included. suitable, which are projected internally at these angles (No.2). Said lateral supports or rods for travel (No.1) can be straight or made up of several sections, which in the example of practical embodiment shown in the figure have telescopic lateral support and there are eight sections that make up each of said bars for travel (No.1) but whose number may vary or have a telescopic, co-linear or straight folding shape or its travel bars are an associated operative part. Rarely to an apparatus, machine, utensil, tool or object whether mechanical, hydraulic and / or electrical, without thereby affecting the essence of the present invention, said sections of travel bar are suitably coupled to each other and arranged in parallel form to form said two lateral supports (No.1); either telescopic, foldable and / or straight, they carry at least one longitudinal co-linear groove arranged on at least one of their faces, preferably on their inner face, and coupled to it an insert that is presented as a graft ( No.16) which can be rubber, plastic or any other material with appropriate mechanical properties and a guide element or rail (No.15) that adopts variant shape and arrangement, which are arranged in at least one of their corresponding faces of said travel bars (No.1), which can be made of aluminum, steel or any other material with suitable mechanical properties, and a lower crossbar (No.4) arranged at the bottom of said travel bars ( No.1), which can comprise a fastening means or ring (No.6), which can be made of aluminum or any other material with appropriate mechanical properties and is fixed by any suitable fastening means. At the upper end of said rods for travel (No.1) there is an upper transverse bar (No.7) that can be made of aluminum or any other material with appropriate mechanical properties. In said upper crossbar (No.7) carries a reel (No.27) through which a guide element or tape (No.8) slides, wound on said reel (No.27) whose end is fixed, by any suitable fastening means, and its other end carries a fastening means or hook which engages in said ring (No.6) disposed in said lower cross bar (No.4) arranged between said rods for travel (No.1) which serves for the release and / or collection of its sections of said bars for re- run (No.1) and / or guide for the sliding of said individual belts (No.10). Said reel (No.27) has a regulation means that is presented in the form of a metal toothed band or any other material with appropriate mechanical properties, which is arranged in its internal hollow and is fixed, by any suitable means of fastening, and other in the fixing part of said reel (No.27) in said upper transverse bar (No.7) arranged in the upper part of said rods for travel (No.1) or upper part in structure that is treated to properly couple both and act in a geared manner that serve to control the untimely sliding of its sections of said rods for travel (No.1) or parts of any structure in question; said reel (No.27) and toothed bands can be omitted in a structure in question in case the supports are straight because there will be no sections of bars for travel that are released or collected, or they can be placed in pairs at their ends said upper transverse bar (No.7) or structure in question, without thereby affecting the essence of the present invention. Said tape (No.8) can be made of canvas or any other material with appropriate mechanical properties, which is fixed at one of its ends to said reel (No.27) by any suitable fastening means, and its deployment is controlled by a reel control mechanism disposed in said upper transverse bar (No.7) that is in the form of a lever (No.9) with freedom of movement in itself to act when lifting and locking and is arranged on one side of said Reel (No.27), which can be made of aluminum or any other material with appropriate mechanical properties and is fixed by any suitable means of attachment. Said lever (No.9) also determines the displacement of said reel (No.27) and serves for the deployment of said tape (No.8) when it is unlocked and lifted. Another function of said tape (No.8) is to guide individual handles or straps (No.10), which serve as handles that can be made of canvas or any other material with appropriate mechanical properties and one of its ends has a means inserted of fastening which is preferably presented in the form of a ring that can be made of aluminum or any other material with appropriate mechanical properties, and is suspended at its other end of said belts (No. 10) by a suspension element or hooks (No.11), arranged separately from each other arranged on said bar (No.7), which can be made of steel or any other material with appropriate mechanical properties and are fixed by any suitable fastening means, whose shape and arrangement can vary in structure that is treated or not, without affecting the essence of the present invention. Both crossbars (No.4 and 7) and said belt (No.8) can cooperate operably for said individual belts (No.10) and / or said reel (No.27) and / or lever (No. 9) and / or hooks (No.10) and / or ring (No.6) which in the example of practical embodiment represented in the figure said upper and lower crossbars (No.4 and 7) cooperate for said individual belts (No.10 ), reel (No.27), lever (No.9), hooks (No.10), hoop (No.6) but such cooperation can be provided by said reinforcement or folding bar and / or bars (No.3) with the square-shaped ends and said tape (No.8) can cooperate for the individual belts (No.10) without being operably associated with said reel (No.27) and can be fixed and / or detachable and assembled in structure that is try or not to wear them, without affecting the essence of the present invention.

• Said individual belts (No. 10) serve as a handle for the user when using said ladder or structure in question, which is they are suspended by one of their ends on said hook (No.11) that are preferably proportional to the number of said individual belts (No.10) and steps or bars (No.17), so that in the example of practical embodiment represented in the figure are ten hooks (No.11), ten individual straps (No.10) and ten steps or bars (No.17), but whose number may vary or not take them without affecting the essence of this invention. The function of said belt (No.8) is to guide said individual belts (No.10) at the moment when the user slides along said ladder so that it can be suppressed or replaced by a tube coupled by its ends in the upper and / or lower part of said rods for travel (No.1) or lateral supports in the structure in question and at the end bearing a hoop or loop, etc. of the same of said individual belts (No.10) which is coupled itself and in turn in said tape (No.8), and its other end are suspended in said hooks (No.11), when the user take one of said individual belts (No.10) the end that carries a ring is sliding along said tape (No.8) simultaneously with said movable step or bar (No.17) than in the example of practical embodiment represented in the figures it is a tape (No.8) but it can be a tube that performs the same function or be suppressed if its use does not require handles or applied in the structure in question, without affecting the essence of the present invention.

Said rods for travel (No.1) have at least one reinforcement to keep them rigid, while their sections of said rods for travel (No.1) of said ladder housed together also have a reinforcement or bar ( No, 3) in its armed part to keep them rigid, with their square-shaped ends and when they are Folding are formed by several bars and also carry a top and bottom bar with its square-shaped ends that allow folding and extending, these can be fixed by any suitable means of support and / or mountable and removable in the structure that is T and can be made of aluminum or any other material with adequate mechanical properties, and its function is to prevent deformation of each section of said bar for travel (No.1) and / or rigidity and / or support against the wall of the referred ladder when in use or extended. Its number is determined by the number of pairs of its sections of said rods for travel (No.1) and the length of said ladder, while its total length of any type is determined as required.

When it is required to release its sections from said rods for travel (No.1) said lever (No.9) will be lifted and said tape (No.8) is deployed together with said crossbar (No.4), arranged in the lower part of said rods for travel (No.1), with their sections of said rods for travel (No.1) which will slide down with each other, the lower ends of the latter being those that will make contact with an area of settlement, the end of said belt (No.8) will be hooked in said ring (No.6), arranged in said bar (No.4), arranged in the lower part of said rods for travel (No.1) , and when deploying said tape (No.8) it will slide along said reel (No.27) down and in turn will slide in slidable form to its sections of said rods for travel (No.1), and said lever returns to act ( No.9) when locked on said reel (No.27) to hold said tape tight (No.8). Once said ladder is extended, its compaction will be carried out with the operation of said lever (No.9). emptying of said reel (No.27) and acting when turning and said tape (No.8) will roll up sliding itself, simultaneously its sections of said rods for travel (No.1) are sliding up and in turn inserting each other until they occupy their initial compaction position, said tape (No, 8) when caught in said ring (No.6), arranged in said crossbar (No.4), located at the bottom of said bars for travel (No.1), it will also pull to said lower crossbar (No.4), while said belt (No.8) will occupy its initial winding position on said reel (No.27), then said lever (No .9) acts by locking to keep its sections of said bars for travel (No.1) subjects.

Their sections of said rods for travel (No.1) suitably coupled to each other, and arranged in parallel, each pair may preferably have a reinforcement or bar (No.3) with square-shaped ends, to keep them rigid when said ladder is extended and / or resting against the wall or wall and / or any structure in question and / or properly coupled several folding bars (No.3) with the square-shaped ends. Said bar (No.3) foldable with the square-shaped ends serves to give greater rigidity and can be fixed and / or detachable and assembled and both types of reinforcement can be applied, as required, than in the embodiment example practical shown in the figure shows the type of a bar with the square-shaped ends and can be fixed and / or detachable and assembled and can carry any type of reinforcement or both at the same time and its number is nine but it can vary and be applied to said ladder and / or structure in question or not, without affecting the essence of the present invention. Said bar (No.3) with The square-shaped ends can preferably be arranged at the top and / or bottom of said travel bars (No.1) for resting against the wall or wall when their travel bars (No.1) are straight.

With reference to Figure 2 is a perspective view of two sections of said travel bars coupled in the same ladder. In this figure the dimensions of its sections of said bars for travel (No.1) are decreasing in terms of width, according to their position in said staircase, the length of each of said bars for travel (No.1) will be given by the compactness of said ladder and / or structure in question when it is passive and the total length that the ladder is required. Said rods for travel (No.1) that have a telescopic shape, consisting of several sections, straight or foldable type or being operably associated with any structure in question, any type has at least one longitudinal linear groove arranged in at least one of its corresponding faces of said rods for travel (No.1) where an insert or graft (No.16) that can be made of plastic or any other material with longitudinally appropriate mechanical properties for control is suitably coupled. of said movable steps or bars (No.17); a guiding element that adopts arrangement and variant form that is presented in the form of at least one rail (No.15) that adopts variant form and arrangement, which can be fixed, by any suitable fastening means, in at least one of its faces of said rods for travel (No.1) which can be, of aluminum or any other material with appropriate mechanical properties, which serves as a guide when inserted into and in said graft groove (No.16) said ends overhangs or shafts (No.18) and guides (No.19), of said steps or bars (No.17) that serves to control the rise and / or descent thereof, which in the example of practical embodiment represented in the figure is a graft groove (No. 16) and a rail (No.15) disposed internally on only one of its faces of said rods for travel (No.1) but whose number may vary from graft grooves (No.16) or not have a groove and / or said graft (No.16) go on the edge of a rail and / or on said rods for travel (No.1) that are used for travel in any structure that is concerned or not go properly coupled the steps or bars (No .17), and rail number (No.15) vary and be arranged on at least one of its internal and / or external faces of said rods for travel or omitted in structure that is intended to be coupled to said rungs or bars (No .17) operably and / or said rail (No.15) take the variant form and arrangement when it is operably associated with other types of structures that are devices, I have tools, utensils, objects and / or machines whether hydraulic, mechanical and / or electrical or not carrying them, without affecting the essence of the present invention. In the upper and / or lower part of said rods for travel (No.1) in the structure in question, in their corresponding face they can have a smaller dimension in terms of width and said graft (No. 16) thinner in terms of its constant longitudinal thickness, from its upper and / or lower part to below the positioning position of said rungs or bars (No.17) and recover its dimension in its immediate remaining part which serves to make said rungs in that part or Bars (No.17) are inserted and raised and / or descended without friction or not carrying it in the structure in question, without affecting the essence of the present invention.

In the gaps of its upper and / or lower ends of said ba- Rare for travel (No.1) of said ladder and / or structure in question are coupled plugs that are presented in the form of a plate (No.5) and take a variant form according to the characteristics of the ends of said rods for travel (No.1) in the structure in question, which can be made of plastic and / or non-slip and can be fixed under pressure, etc. and / or mountable and removable and / or removed as required or of any other material with appropriate mechanical properties or not to go when they do not allow their coupling that serve as a non-skid and to cover their gaps, without thereby affecting the essence of the present invention. Said longitudinal rail (No.15) adopts variant form and arrangement, since it will be determined by the shape of its bar for travel (No.1) of said ladder and / or when operably associated with the structure in question of an apparatus , machine, tool, utensil or object, whether hydraulic, electrical and / or mechanical, and serve as a guide when it is externally and / or internally in its lateral supports of the structure in question and may not have a graft groove (No.16) otherwise, said graft (No.16) can be fitted properly on the edge of said rail (No.15), or not carry said rail (No.15) in case of operably associating its steps or bars in the structure in question or not carry them, without affecting the essence of the present invention

With reference to Figure 3 showing a front view of a step or bar mechanism of the same ladder. Said step or bar mechanism serves as a load support formed by a central body or bar that has lateral projections that is presented in the form of a step or bar (No.17) that carries at least one of its ends coupled an axis (No.18) protruding and at whose end of said axis (No.18) a guide (No.19), said three parts, may be attached damage or bar (No.17), guides (No.19) and shafts (No.18) can be made of aluminum, steel or any other material with appropriate mechanical properties and fixed by any suitable fastening means, where its axes (No .18) and guides (No.19) inserted into said groove with said graft (No.16) and said rail (No.15), arranged on said travel bars (No.1) which serves as a guide in sliding of said movable steps or bars (No.17), said axes (No.18) being in constant contact with said graft (No16), act for ascent and / or descent control when pressing said graft (No.16 ) to said axes (No.18) and to make friction in sliding.

Said step or bar (No.17) can carry said guides (No.19) and / or said axes (No.18) or be omitted according to the structure in question when operably associated which in the example of practical embodiment represented in the figure carries said elements but, it can carry said axes (No.18) and / or said guides (No.19) and / or both and / or not carry them but to make its function efficient, an operably ascent and / or descent actuator can be coupled , hydraulic and / or electrical in said ladder and / or structure concerned apparatus, machine, tool, utensil and / or object and / or an associated part in travel, without thereby affecting the essence of the present invention. Said axes (No.18) and guides (No.19) take a variant form to be coupled to said rail (No.15) but may vary by changing the way in which said rail is presented (No.15) and / or travel bars (No.1), and said shafts (No.18) and guides (No.19) can have damping and / or insulating material that will serve to reduce noise and reduce heat when acting said ladder and / or structure that is set β, without P, ^{which is} the essence of the present invention. Referring to Figure 4 is a front section of the first pair of sections of said lateral supports showing a mechanism for ascending and / or descending steps and / or bars and a step or bar mechanism of the same ladder. In said figure the ascent and / or descent mechanism of steps and / or bars is formed by an elastic element that is presented in the form of a spring at the end of which it has a hemispherical stop (No.22), it has at least a load or gear support (Nos. 20 and 21), preferably three, a rung control or articulated bar or bar (No.24) and has at least one outstanding section (No.23). Said means for ascending and / or descending steps and / or bars comprises an internal and / or external crane type mechanism consisting of said steps or bars (No.17) with freedom of movement on a single axis with a maximum travel of the size of said rods for travel (No.1) and / or of any structure in question, said rungs or bars (No.17) when being formed by said outstanding axis (No.18) and said guides (No.19) ( see figure 3) at its ends, which are inserted in said rails (No.15) which serve as a guide for the route on said bars for travel (No.1), said guides (No.19) when inserted into said slot with graft (No.16) (see figure 2), arranged on its corresponding face of said rods for travel (No.1), for the ascent and / or descent of said steps or bars (No.17) when in contact constant and act by friction on said graft (No.16) for the control of ascent and / or descent of said steps or bars (No.17); Such elements may be made of steel or any other material with appropriate mechanical properties, which are fixed, by any appropriate means of attachment with the appropriate fit and strength. One of said gears (No.21) that is at the same level of the reference spring (No.22) to hold the first step or bar (No.17) in which will be positioned by the user and / or load of material. Two of said gears (Nos. 21) that are at the same reference level to support the second step or bar (No.17) support, if applicable, the rest of said group of steps or bars (No.17 ) in the upper and / or lower part of said ladder and / or structure in question, which in the example of practical embodiment represented in the figures are ten steps or bars (No.17), but at least one step or bar (No.17) and whose number may vary and the arrangement of its parts of said means of ascent and / or descent of steps and / or bars can go in the upper and / or lower part of the structure in question and The number of pairs of said gears (Nos. 20 and 21) with or without spring (No.22) may vary or have another load bearing means for its ascent and / or descent or operably associate a mechanical, hydraulic and mechanical mechanism. / or electrical to make the function efficient and apply or not to the structure in question, without affecting to the essence of the present invention; when said second step or bar (No.17) descends simultaneously the rest of said group of steps or bars (No.17) will slide down together, the next one will take its place. Said shafts (No.18) and guides (No.19) of said group of steps or bars (No.17) are inserted into said groove with said graft (No.16) and said rail (No.15), arranged in their corresponding face of said travel bars (No.1) to place them in their initial position in the upper part of said travel bars (No.1) and said steps or bars (No.17) be suspended in the upper part and / or lower by the smaller dimension of its lateral supports (No.1) in the upper and / or lower part of said ladder and / or structure that is treated or not carried, without thereby affecting the essence of the present invention . Your control of said steps or bars (No.17) presented by the an articulated bar (No.24), are housed in said travel bar (No.1), which go internally and / or externally, which also supports said pair of gears (No.21) aligned and separated between yes at the end of which it has a clamping means or hoop, said articulated bar (No.24) can be made of aluminum, steel or any other material with appropriate mechanical properties and is fixed, by any suitable clamping means, which has less an outstanding section (No.23) or sure that it can be made of aluminum, steel or any other material with appropriate mechanical properties, and that is fixed, by any suitable fastening means, at an equivalent height with said gears (Nos. 21), in which example of practical embodiment represented in the figure are two projecting sections (No.23) housed in a single gap between their teeth of said gears (No.21), separated from each other in one of said rods for travel (No.1), but they can be several and ran urated and staying in more than one hole between said teeth of said two gears (Nos. 21) corresponding or not carrying them without thereby affecting the essence of the present invention, arranged to lodge in the gaps between their teeth of said gears (No.21) acting as safe for the ascent and / or controlled descent of said steps or bars (No.17) where it may not appear or present a variant form depending on the structure in question.

Said articulated bar (No.24) has two operating times, one to climb said protruding sections (No.23), it will only be necessary to release said steps or bars (No.17), and the other to raise them higher of their teeth of said two gears (Nos. 21) to release the use of said steps or bars (No.17) and place them in their initial position. Referring to Figure 5 which shows a cross section of two sections of said lateral supports of the same ladder. In said figure, each section of said rods for travel (No.1) can be made of aluminum or any other material with appropriate mechanical properties, it is armed with rings that can be made of aluminum, steel or any other material with suitable mechanical properties, which are fixed, by any suitable means of attachment, an internal one (No.26) in its lower part and an external one (No.25) in its upper part, for its assembly, except for the first pair of its sections of said rods for travel (No.1), which do not have an outer ring (No.25) since they are coupled to said angles (No.2). The last pair of its sections of said rods for travel (No.1) in its lower part, do not have an internal ring (No.26), since they do not fit to another section of rods for travel (No.1) in addition, appropriate fastening means, said rings (Nos. 25 and 26) may carry damping material to reduce noise when unfolding or compacting their sections of said travel bars (No.1) and have a groove that is determined by the shape of its rods for travel (No.1) and / or not to carry them by carrying another assembly, without affecting the essence of the present invention.

To understand the operation of said adjustable ladder with movable steps or bars (see figure 6) it is first necessary to fix said angles to the area, be it a wall or window, etc., a user will position his feet on one of said steps or bars (No.17) and / or a load of material will be deposited and will ascend and / or descend.

The invention has been described sufficiently that a person With average knowledge in the field, I can reproduce and obtain the results that we mention in the present invention but it has the inventive activity because it is outside the state of the art and is of industrial application. However, any skilled person in the field of the art that is in charge of the present invention may be able to make modifications not described in the present application, however, if for the application of these modifications in a given structure or in the manufacturing process thereof, the subject matter claimed in the following claims is required, said structures must be included within the scope of the present invention.

Claims

REIVINDICATION Having described my invention sufficiently, my content is claimed as contained in the following claims clauses:

1.- Adjustable ladder with steps or movable bars characterized in that it is composed of an adjustable clamping mechanism consisting of arms or angles in the form of "L" attachable in pairs, four angles, an angle of each pair comprises in one of its one perforation arms, while the other angle of each pair comprises more than one perforation for the corresponding adjustment, each pair of angles cooperating in a sliding way and being hooked and fixed, by any suitable fastening means, a screw with nut, to the match said perforations as required by the area where it is to be fixed. Of each pair of said angles, one of them, the one facing outwards, comprises supports or bearings in the lower part of the angles for resting against the wall or wall. In said angles comprising bearings, there are two lateral supports or rods for travel that project internally with a groove with insert or graft and a guide element or internal longitudinal rail arranged on its corresponding internal face that serve as a guide for the ascent and / or descent of your step or movable bar. Said travel bars internally comprise a crane type mechanism for the ascent and / or descent of said movable steps or bars, consisting of the steps or bars with freedom of movement, which have a central body or bar and lateral projections or shafts and guides that are inserted in its guide element or longitudinal rail arranged in the internal part of its groove in said travel bars for sliding control of said movable steps or bars. Said rods have reinforcements or bars with the ends in the form of a square one upper and one lower that serves as reinforcement to prevent its deformation and rest against the wall or wall and / or rigidity in addition, some caps in the form of plates arranged in the gaps of its four ends.

2. Adjustable ladder with steps or movable bars, characterized in accordance with claim 1, wherein said arms or angles have a variant shape such as at least one pair of angles or any other viable as a curve, etc. as long as its arms allow adjusting to the area where it is to be fixed, it also has varying resistance that is determined by its load, its total length and its material can be aluminum or any other viable as metal, etc; Its dimension is determined by what is desired and the area where it is to be fixed.

3. Adjustable ladder with movable steps or bars, characterized in accordance with claims 1 and 2, wherein said lateral supports or travel bars are included which have at least one rectangular structural or any other viable as square structural structure, etc. as long as they serve for travel, it presents a straight variant type or any other viable one such as folding, telescopic, etc. coupled to the bottom of two of said angles comprising bearings, face the outside; Its resistance is determined according to its structure load and can be made of aluminum or any other viable material such as metal, etc., and its dimension will depend on what is desired.

4. Adjustable ladder with steps or movable bars characterized in accordance with claims 1, 2 and 3, wherein said movable steps or bars or bar includes at least one central body or bar with lateral projections or projecting axes and / or guides and variant form as without projections, etc. which serve to be inserted in its groove of said lateral supports or bars for sliding travel which can carry damping and insulating material where its resistance will depend on its load that supports that it can be made of aluminum or any other viable material such as plastic, etc. for the use of personnel and / or cargo material and its size is determined as desired.

5. Adjustable ladder with steps or movable bars characterized in accordance with claims 1, 2, 3 and 4, which includes said reinforcement or bar that has at least one bar variant with the ends in the form of a square and / or folding with bar with the square-shaped ends or any other viable as a curved bar with the square-shaped ends, etc., to give rigidity and / or support against the wall or wall whose arrangement has variants in said lateral supports or bars for As long as its upper reinforcement can cooperate for the provision of a suspension element or hooks and a guide or tape element, a reel or lever control and / or a reel, its resistance is determined according to its load bearing and can be of aluminum or any other viable material such as metal, etc., and its size will depend on what is desired.

6. Adjustable ladder with steps or movable bars characterized according to claims 1, 2, 3, 4, and 5 where it includes plugs for at least one plate and its shape has variants according to the characteristics of the gaps of its ends of its lateral supports or rods where they are inserted and the lower plugs can have non-skid material and be made of plastic or any other material with appropriate mechanical characteristics .

7.- Adjustable ladder with movable steps or bars characterized according to claims 1, 2, 3, 4, 5 and 6 where said elastic element optionally includes or at least a spring with a horizontal hemispherical stop which has a variant shape housed in one of said lateral supports or rods for travel and a load or gear support arranged at an equivalent height in said bar for opposite travel acting extending and compressed when the friction in the guides of its ends of its steps or movable bars for its ascent is overcome. and / or descent or by any other viable such as pulley system, piston, etc., its resistance is determined by its load which can be made of steel or any other viable material such as metal, etc.

8. Adjustable ladder with movable steps or bars characterized according to claims 1, 2, 3, 4, 5, 6 and / or 7 where optionally it comprises at least one crossbar in case of having sections of supports or bars for travel, two bars, an upper one arranged in the upper part of said lateral supports or bars for travel and the other one arranged in the lower part of said supports or bars for travel which have a circular or any other variant shape as square, etc, which it can be made of aluminum or any other viable material such as metal, etc., which cooperates for the provision of parts for the release and / or collection of its sections nes of lateral support or bar for travel to the ascent and / or descent of its steps or movable bars and / or disposing said parts in any other viable as reinforcement, etc., its resistance is determined by its bearing load and its dimension wanted.

9. Adjustable ladder with steps or movable bars characterized according to claims 2 and 1 wherein said support is presented in variant form of at least one rectangular bearing or any other viable as square, etc. as long as it serves as a support against the wall or fixing area and with variant resistance to withstand the pressure of its bars to travel against the area where it is to be fixed which is arranged in the internal part of the angle that gives the exterior that can be of rubber or any other viable material and its dimension as desired.

10. Adjustable ladder with steps or movable bars characterized in accordance with claims 2 and 9 wherein said bearing has its variant fixed clamping means such as at least one rivet or any other viable as glued, etc. to hold it by any of at least one of its points of support with said corresponding angle in its lower part.

11. -Adjustable ladder with movable steps or bars characterized according to claims 2 and / or 9 to 10 wherein said bearing presents its optionally mountable and detachable variant clamping means such as at least one screw and nut or any other viable as adhering, etc. to hold it by any of at least one of its support points with its corresponding arm or angle to be foldable

12. Adjustable ladder with movable steps or bars, characterized according to claims 2 and / or 9 to 11, wherein said bearing optionally does not occur when its angles are suitably coupled to the structure fixing area where it is applied, etc.

13.-Adjustable ladder with steps or movable bars characterized according to claims 2 and 9 to 12 where said adjustment element is presented in variant form of at least one perforation or any other viable as inverse eyebrows, etc., fixed by any suitable means of fastening, its number and arrangement of perforations in both angles presents variants for greater adjustment option.

14.- Adjustable ladder with steps or movable bars characterized according to claims 2 and / or from 9 to 13 where said perforations are not optionally presented when their angles are adequately coupled to the fixing area by other adjustment means such as reverse eyebrows to get hooked, etc.

15. Adjustable ladder with movable steps or bars, characterized according to claims 2 and 3 and 9 to 14, wherein said arms or angles have their variant fixed clamping means when fixing said angles that give the exterior to said two bars for path that are projected inferiorly by welding aluminum by any type of viable welding such as copper, etc., among other viable fastening means such as rivets, etc. by any of at least one of its support points of its upper part of said bars for travel in structure that is treated with the bottom of said angles.

16.- Adjustable ladder with movable steps or bars characterized according to claims 2 and 3 and / or 9 to 15, wherein said arms or angles have their optionally mountable and detachable variant clamping means such as at least one screw with nut or any other viable as a clamp, etc., by any of at least one of its support points of its upper part of said bars for structure travel that is treated with the lower part of said angles to be foldable.

17. Adjustable ladder with movable steps or bars characterized according to claims 2 and with any of 9 to 16 where its structure and / or parts of said adjustable clamping mechanism is viable to be applied to any structure and / or part in question

18. Adjustable ladder with steps or movable bars characterized according to claims 3 and 9 to 17 where at least one groove is presented in at least one of its faces so that its lateral projections or axes are inserted and / or guides of at least one step or movable bar and its arrangement is variant to the center and / or side on its faces.

19. Adjustable ladder with movable steps or bars, characterized according to claims 3 and / or 9 to 18, wherein said slot optionally does not occur when said step or movable bar acts by other viable motion actuators such as a piston, etc.

20.- Adjustable ladder with movable steps or bars characterized according to claims 3 and 9 to 19 where an insert is presented in variant form of at least one insulating rubber graft or any other viable as a projection with insulating material front, etc., with variant arrangement in said grooves and / or in any viable part on their faces of said travel bars that serves to control in sliding of their steps or movable bars.

21. Adjustable ladder with steps or movable bars characterized according to claims 3 and 20 and from 9 to 19 wherein said graft has its variant fixed clamping means according to claim 10 with its corresponding face on said travel bar.

22. Adjustable ladder with steps or movable bars characterized according to claims 3 and 20 and / or from 9 to 21, wherein said graft has its optionally mountable and detachable variant clamping means according to claim 11 with its corresponding face in said travel bar.

23.- Adjustable ladder with steps or movable bars characterized according to claims 3 and / or from 9 to 22 where said graft optionally cannot be presented when said travel bars have an eyebrow or side bars to fence or guide the step or movable bar and have insulating and friction material or any other viable insert.

24.- Adjustable ladder with steps or movable bars characterized according to claims 3 and 9 to 23 where a guide element is presented in variant form of at least one structural rail or any other viable such as longitudinal eyebrows, etc., which is inserted in its groove disposed in the inner face of its lateral support or travel bar that serves as a sliding guide to said step or movable bar, its resistance is determined by its load that can be of aluminum or any other resistant material such as metal, etc. whose arrangement is variant as it is internal and / or external of at least one of its faces of said travel bars and its dimension will be determined by the length of its travel bars.

25.- Adjustable ladder with steps or movable bars characterized according to claims 3 and 24 and from 9 to 23 where said rail has its variant fixed clamping means according to claim 10 with said rods for travel.

26.- Adjustable ladder with steps or movable bars characterized according to claims 3 and 24 and / or from 9 to 25, wherein said rail has its optionally mountable and detachable mounting means according to claim 11 with said rods for travel .

27.- Adjustable ladder with steps or movable bars characterized according to claims 3 and / or from 9 to 26 where said rail optionally cannot be presented when its step or movable bar acts by any other viable system such as piston, etc.

28.- Adjustable ladder with steps or movable bars characterized according to claims 3 and 9 to 27 where said travel bars have their upper and / or lower part, preferably on its inner face, a smaller dimension in terms of its width and / or diameter and said thinner insert or graft in terms of its constant longitudinal thickness, from its upper and / or lower part to below and / or above the position of positioning of said movable steps or bars and recovering their dimension in its immediate remaining part which serves to place said movable steps or bars in that part to be inserted and ascending and / or descending without friction.

29.- Adjustable ladder with steps or movable bars characterized according to claims 3 and / or from 9 to 28 where said smaller dimension in terms of diameter and thickness cannot be presented when its step or movable bar acts by any other viable system as a piston, etc.

30. -Adjustable ladder with steps or movable bars characterized according to claims 3 and / or from 9 to 29 where said bars for travel optionally presents telescopic, folding or any other viable type that present sections in its travel bar, each of these sections also has a co-linear groove so that the ends of its sliding steps or sliding bars are inserted.

31.- Adjustable ladder with steps or movable bars characterized according to claims 3 and 30 and from 9 to 29 where rings are also presented variably arranged in their sections of said bars for an external path in its upper part and another intern in its lower part for assembly where it can carry damping material, except the first does not have an upper ring when it is coupled to said angle and / or structure in question and the last lower one because it does not engage another section of said bar for travel and / or structure, they also have a groove in variant form, according to characteristics of their groove of said travel bar that can be made of aluminum or any other viable resistant material such as metal, etc.

32.- Adjustable ladder with movable steps or bars characterized according to claims 3, 30 and 31 and from 9 to 29, wherein said rings have their variant fixed clamping means according to claim 10 with their sections of said travel bars .

33.- Adjustable ladder with steps or movable bars characterized according to claims 3, 30 and 31 and / or from 9 to 32, wherein said rings have their optionally mountable and detachable clamping means according to claim 11 with said bars for travel.

34.- Adjustable ladder with movable steps or bars, characterized according to claims 3 and / or 9 to 33, wherein said lateral support sections or travel bar optionally do not occur when said travel bars are straight, continuous , etc,

35.- Adjustable ladder with movable steps or bars characterized according to claims 3 and with any of 9 to 34 where its structure and / or parts of said lateral supports or travel bars are viable to be applied to any structure and / or part concerned.

36.- Adjustable ladder with steps or movable bars characterized according to claims 4 and 9 to 35 where there is at least one lateral projection in variant form of protruding axis, or any other viable as a bolt, etc. arranged in at least one of its ends of said central body or bar Inserts in its groove of said rods for travel for ascent and / or descent that can be made of aluminum or any other viable resistant material such as metal, etc., which can carry damping material.

37. -Adjustable ladder with movable steps or bars characterized according to claims 4 and 36 and from 9 to 35, wherein said projecting axis has its variant fixed clamping means according to claim 10 with said bar.

38.- Adjustable ladder with movable steps or bars characterized according to claims 4 and 36 and / or 9 to 37, wherein said protruding axis has its optionally mountable and detachable variant clamping means according to claim 11 with said bar.

39.- Adjustable ladder with movable steps or bars, characterized according to claims 4 and / or 9 to 38, wherein said projecting axes optionally do not occur when acting on any other viable system such as pulleys, etc.

40.- Adjustable ladder with steps or movable bars characterized according to claims 4 and 9 to 39 where it has at least one lateral projection in the form and variant arrangement of guide or any other viable as plate, etc., arranged in at least one of its ends of said bar and / or end of said protruding shaft, etc., which are inserted into its groove of said bars for ascent and / or descent travel that are made of aluminum or any other viable resistant material such as metal, etc., which They can carry damping material.

41.- Adjustable ladder with movable steps or bars characterized according to claims 4 and 40 and 9 to 39, wherein said guides have their variant fixed clamping means according to claim 10 with said bar and / or end of said protruding axis.

42.- Adjustable ladder with steps or movable bars characterized according to claims 4 and 40 and / or from 9 to 41 where said guides have their optionally mountable and detachable variant clamping means according to claim 11 with said bar and / or end of said protruding shaft.

43.- Adjustable ladder with steps or movable bars characterized according to claims 4 and / or 9 to 42, where said guides are not optionally presented when acting by any other viable system such as piston, etc.

44.- Adjustable ladder with movable steps or bars characterized according to claims 4 and with any of 9 to 43 where its structure and / or parts of said mechanism of element in travel or step or movable bar are viable to be applied to any structure and / or part concerned.

45.- Adjustable ladder with steps or movable bars characterized according to claims 5 and / or from 9 to 44, where it optionally presents a means of fastening in the form of a ring or any other viable as a ring, etc. arranged in reinforcement or lower bar that cooperates to hold a guide element that can be made of metal or any other viable resistant material.

46.- Adjustable ladder with movable steps or bars characterized according to claims 5 and 45 and from 9 to 44 wherein said ring has its variant fixed clamping means according to claim 10 with said reinforcement or bar.

47.- Adjustable ladder with movable steps or bars characterized according to claims 5 and 45 and / or from 9 to 46 wherein said ring has its optionally mountable and detachable clamping means according to claim 11 with said reinforcement or bar .

48.- Adjustable ladder with steps or movable bars characterized according to claims 5 and / or 9 to 44, where an optionally guide element is presented in variant form of at least one tape or any other viable as a tube, wire, etc. arranged longitudinally in said reinforcement or upper bar to release and / or pick up its sections of said travel bars, another function is to guide guides, its resistance is determined by its load of its travel bar sections that can be of leather or any other viable resistant material such as canvas, etc., and its dimension is preferably determined by the length of the ladder. Its upper end is coupled to said reinforcement or upper bar and / or said upper crossbar and / or said reel.

49.- Adjustable ladder with steps or movable bars characterized according to claims 5 and 48 and from 9 to 47 where it also has a variant fastening means of at least one hook or any other viable as an open ring, etc. , arranged at the lower end of said tape to engage with said ring disposed in said lower reinforcement which can be made of aluminum or any other viable metal resistant material, etc.

50.- Adjustable ladder with movable steps or bars characterized according to claims 5, 48 and 49 and from 9 to 47, wherein said hook has its variant fixed fastening means according to claim 10 with said tape.

51.- Adjustable ladder with steps or movable bars characterized according to claims 5, 48 and 49 and / or from 9 to 50, wherein said hook has its optionally mountable and detachable variant clamping means according to claim 11 with said tape .

52.- Adjustable ladder with steps or movable bars characterized according to claims 5 and 48 and / or 9 to 51 where said hook cannot optionally be presented when said guide element is a tube, etc.

53.- Adjustable ladder with steps or movable bars characterized according to claims 5 and 48 and from 9 to 52 where its upper end of said belt has its variant fixed clamping means according to claim 10 with said reinforcement and / or upper crossbar and / or reel.

54.- Adjustable ladder with movable steps or bars characterized according to claims 5 and 48 and / or 9 to 53 where its upper end of said belt has its optionally mountable and detachable variant clamping means according to claim 11 with said reinforcement and / or upper crossbar and / or said reel.

55.- Adjustable ladder with steps or movable bars characterized according to claims 5 and / or 9 to 54 where said belt is optionally not present when the structure is used for loading material, etc.

56.- Adjustable ladder with steps or movable bars characterized according to claims 5 and / or from 9 to 55 where optionally it has at least one handle in variant form of individual belt or any other viable as ring, etc., inserted in said tape so that they slide and serve as handles for the user etc., which are leather or any other resistant material suitable as canvas, etc.

57.- Adjustable ladder with movable steps or bars characterized according to claims 5 and 56 and / or from 9 to 55 where it optionally presents a clamping means in variant form of at least one ring or any other viable as lacing of the same belt, etc., inserted in said individual belt with said tape for its sliding which can be made of aluminum or any other resistant material suitable as metal, etc.

58.- Adjustable ladder with steps or movable bars characterized according to claims 5, 56 and 57 and from 9 to. Wherein said ring has its variant fixed clamping means according to claim 10 with said individual belt.

59.- Adjustable ladder with steps or movable bars characterized according to claims 5, 56 and 57 and / or from 9 to 58 where said ring has its optionally mountable and detachable clamping means variant insert, etc. by any of the minus one of its support points with said individual belt and said tape.

60.- Adjustable ladder with steps or movable bars characterized according to claims 5 and / or from 9 to 59 where said individual belts optionally cannot be presented when their use is for loading material, etc.

61.- Adjustable ladder with steps or movable bars characterized according to claims 5 and / or 9 to 60 where optionally there is at least one suspension element in variant form of hook or any other viable as adhesives, etc. arranged separately from each other in said upper reinforcement and / or crossbar so that one of its ends of said individual belt which can be made of metal or any other viable resistant material such as plastic, etc. is suspended.

62.- Adjustable ladder with steps or movable bars characterized according to claims 5 and 61 and from 9 to 60 where said hooks (11) have their variant fixed clamping means according to the claim 10 with said upper reinforcement and / or crossbar, etc.

63.- Adjustable ladder and movable steps or bars according to claims 5 and 61 and / or from 9 to 62, wherein said hooks have their optionally mountable and detachable variant fastening means according to claim 11 with said reinforcement and / or upper crossbar, etc.

64.- Adjustable ladder with steps or movable bars characterized according to claims 5 and / or 9 to 63 where said hooks optionally cannot be presented when their use is for loading material, etc.

65.- Adjustable ladder with movable steps or bars, characterized according to claims 5 and 3 and 9 to 64, wherein said reinforcement or bar has its variant fixed clamping means according to claim 10 with said lateral support or travel bars in structure in question.

66.- Adjustable ladder and movable steps or bars characterized according to claims 5 and 3 and / or from 9 to 65, wherein said reinforcement or bar has its optionally mountable and detachable clamping means according to claim 11 with said support lateral or bars for travel in structure in question.

67.- Adjustable ladder with steps or movable bars characterized according to claims 5 and with any of the 9 to 66 where its structure and / or parts of said reinforcement mechanism or bar are viable to be applied to any structure and / or part concerned.

68.- Adjustable ladder with movable steps or bars characterized according to claims 6 and 3 and 9 to 67, wherein said stoppers or plates have their variant fixed clamping means according to claim 10 with their ends of said lateral supports or bar for structure travel in question.

69.- Adjustable ladder with movable steps or bars characterized according to claims 6 and 3 and / or from 9 to 68, wherein said plugs or plates have their optionally mountable and detachable mounting means according to claim 11 with their ends of said lateral supports or bar for travel in structure in question.

70.- Adjustable ladder and movable steps or bars characterized according to claims 6 and / or 9 to 69 where said stoppers optionally cannot be presented when the characteristics of the structure where it is applied do not allow it, etc.

71. -Adjustable ladder with movable steps or bars characterized according to claims 6 and with any of 9 to 70 where any structure and / or parts are included in the present invention.

72.- Adjustable ladder with steps or movable bars characterized according to claims 7 and 9 to 71 where it is presented by At least one load carrier in variant gear or any other viable form of movement such as pulley system, etc., whether mechanical, electrical and / or hydraulic, one acts in tandem with said spring with a hemispherical stop, one installed by above said spring; a pair of gears aligned vertically and separated from each other housed in the other lateral support or rods for travel at equivalent heights with the spring and gear of the opposite lateral support that said upper gears serve to support the group of steps or movable bars through their shafts and / or guides in both said spring with hemispherical stop and gear arranged at equivalent height housed in said side support or bar for travel of the opposite side supports the first step in which the user and / or load, its resistance and adjustment will be positioned It is determined by the load it supports that can be made of metal or any other resistant material such as plastic, etc.

73.- Adjustable ladder with steps or movable bars characterized according to claims 7 and 72 and from 9 to 71 where said gears have their variant fixed clamping means according to claim 10 also with said bar for equivalent height travel lens with said spring with hemispherical stop disposed on said bar for opposite side travel.

74.- Adjustable ladder with movable steps or bars characterized according to claims 7 and 72 and / or from 9 to 73, wherein said gears have their optionally mountable and detachable clamping means according to claim 11 also with said bar for equivalent height travel with said spring with hemispherical stop arranged on the other bar for travel on the opposite side.

75.- Adjustable ladder with steps or movable bars characterized according to claims 7 and / or 9 to 74 where said gears are not optionally presented when acting by another viable movement system such as pulleys, etc.

76.- Adjustable ladder with steps or movable bars characterized according to claims 7 and 9 to 75 where it has a step control in variant form and arrangement of at least one articulated bar or any other viable, as an electrical system, etc, also housed in said projected travel bar with said two gears aligned vertically for movement control thereof where they can also be placed on its other bar for opposite travel or in both which can be made of aluminum or any other viable resistant material such as metal , etc.

77.- Adjustable ladder with steps or movable bars characterized according to claims 7 and 76 and from 9 to 75 where at least one insurance is provided in the form and variant arrangement of protruding sections or any other viable as footings, etc. designed to accommodate the teeth of said vertically aligned gears that serves as a safe for the controlled ascent and / or descent of their movable steps or bars that can be made of aluminum or any other viable resistant material such as metal, etc.

78.- Adjustable ladder with steps or movable bars characterized according to claims 7, 76 and 77 and / or from 9 to 75 where said protruding sections optionally have at least one groove at its end which is used to stay in the gaps from among their teeth of said gears for greater option in number of insurances and / or volume of load.

79.- Adjustable ladder with movable steps or bars characterized according to claims 7, 76, 77 and / or 78 and from 9 to 75, wherein said protruding section has its variant fixed clamping means according to claim 10 at its end upper with said articulated bar.

80. -Adjustable ladder with steps or movable bars characterized according to claims 7, 76, 77 and / or 78 and / or from 9 to 79 where (23) presents its optionally mountable and detachable fastening means according to the claim 11 for its upper end with said articulated bar.

81.- Adjustable ladder with movable steps or bars characterized according to claims 7 and 76 and / or from 9 to 80 where said protruding sections optionally do not occur when acting on another viable pulley system, etc., which controls the ascent and / or descent of said movable steps or bars.

82, - Adjustable ladder with movable steps or bars characterized according to claims 7 and 76 and / or 9 to 81 where said articulated bar optionally presents a clamping means in variant form of at least one ring or any other shape viable as, belt, etc., arranged at its upper end that serves as a handle to act on the user that can be made of aluminum or any other viable resistant material such as metal, etc.

83.- Adjustable ladder with movable steps or bars characterized according to claims 7, 76 and 82 and from 9 to 81, wherein said ring has its variant fixed clamping means according to claim 10 with its upper end of said articulated bar .

84.- Adjustable ladder with steps or movable bars characterized according to claims 7, 76 and 82 and / or from 9 to 83, wherein said ring has its optionally mountable and detachable variant clamping means according to claim 11 with its end upper of said articulated bar.

85. -Adjustable ladder with steps or movable bars characterized according to claims 7, 76 and / or from 9 to 84 where said ring cannot optionally be presented when a part of said articulated bar serves as. handle, etc.

86.- Adjustable ladder with steps or movable bars characterized according to claims 7 and 76 and from 9 to 85 where said articulated bar (24) has its variant fixed clamping means according to claim 10 also in said travel bar which houses said two gears aligned vertically.

87. -Adjustable ladder with steps or movable bars characterized according to claims 7 and 76 and / or from 9 to 86 where said articulated bar has its optionally mountable and detachable variant clamping means according to claim 11 also in said bar for travel that houses said two gears aligned vertically.

88.- Adjustable ladder with steps or movable bars characterized according to claims 7 and / or 9 to 87 where said articulated bar optionally cannot be presented when acting by any other viable control such as electrical system, etc.

89.- Adjustable ladder with steps or movable bars characterized according to claims 7 and 3 and from 9 to 88, wherein said spring has its variant fixed clamping means according to claim 10 its end with said bar for structure travel which be concerned,

90. -Escalera adjustable or movable bars steps characterized according to claims 7 and 3 and / or 9 to 89 wherein ^'said spring means presents its variant optionally mountable and detachable fastening according to claim 11 for its end with said bar for structure travel in question.

91.- Adjustable ladder with movable steps or bars characterized according to claims 7 and / or with any of 9 to 90 where its structure and / or parts of said movement control mechanism of movable steps or bars or spring are viable to be applied to any structure and / or part concerned.

92.- Adjustable ladder with steps or movable bars characterized according to claims 8 and 9 to 91 where it has an i reel inserted in said upper transverse bar which has lateral sections that act when turning and picking up the displacement of said tape that it is preferably rolled up that can be made of metal or any other viable resistant material such as plastic, etc,

93.- Adjustable ladder with movable steps or bars characterized according to claims 8 and 92 and from 9 to 91, wherein said reel has its variant fixed clamping means according to claim 10 with said upper crossbar.

94. -Adjustable ladder with steps or movable bars characterized according to claims 8 and 92 and / or from 9 to 93 where said reel has its optionally mountable and detachable variant clamping means according to claim 11 with said upper crossbar .

95. -Adjustable ladder with steps or movable bars characterized according to claims 8 and / or 9 to 94 where said reel optionally cannot be presented when its upper crossbar has movement in itself and cooperates for the release and / or collection of its sections of said bars for travel, etc.

96.- Adjustable ladder with movable steps or bars, characterized in accordance with claims 8 and 9 through 95, wherein said means of controlling bar sections for variably shaped travel and arrangement has at least one pair of serrated bands one in the internal hollow of said reel and the other at the center of said upper crossbar to engage and control the untimely fall of its sections of said rods for travel or any other viable as a pair of said serrated bands disposed at the ends of said transverse bar superior so that it has movement in itself, etc, that they can be made of metal or any other viable resistant material.

97.- Adjustable ladder with movable steps or bars characterized in accordance with claims 8 and 96 and 9 through 95, wherein said serrated bands have their variant fixed clamping means according to claim 10 with those of said reel and / or said upper crossbar.

98.- Adjustable ladder with steps or movable bars characterized according to claims 8 and 96 and / or from 9 to 97 where said serrated bands have their optionally mountable and detachable variant clamping means according to claim 11 with said reel and / or said upper crossbar.

99.- Adjustable ladder with steps or movable bars characterized according to claims 8 and / or from 9 to 98 where said serrated bands cannot occur when said upper transverse bar has movement in itself, etc.

100. -Adjustable ladder with steps or movable bars characterized according to claims 8 and 9 to 99 where it has a reel control means in variant form of at least one lever with movement itself arranged next to said reel located in said upper transverse bar and / or any other viable as an insurance, etc, which serves to lock and unlock said reel that can be made of aluminum or any other material resists as metal, etc.

101.-Adjustable ladder with steps or movable bars characterized according to claims 8 and 100 and from 9 to 99, where (9) its clamping means is presented fixed variant according to claim 10 at its end with those of said upper crossbar.

102.- Adjustable ladder with steps or movable bars characterized according to claims 8 and 100 and / or from 9 to 101, wherein said lever its clamping means is optionally mountable and detachable variant according to claim 11 at its end with those of said upper crossbar.

103. -Adjustable ladder with steps or movable bars characterized according to claims 8 and / or 9 to 102 where said lever cannot be presented when it does not have a reel, etc.

104. -Adjustable ladder with steps or movable bars characterized according to claims 8 and 3 and from 9 to 103 where said upper and / or lower crossbars presents its variant fixed clamping means according to claim 10 at its ends with the upper and / or lower part respectively of said rods in structure in question.

105, -Adjustable ladder with steps or movable bars characterized according to claims 8 and 3 and / or from 9 to 104 where said upper and / or lower transverse bars have their optionally mountable and detachable clamping means according to claim 11 at its ends with the upper and / or lower part respectively of said bars for structure travel in question.

106.- Adjustable ladder with steps or movable bars characterized according to claims 8 and / or with any of 9 to 105 where said upper and / or lower cross bars optionally does not occur when said integral parts have another arrangement and / or do not show up, do not have bar sections for travel, etc.

107. -Adjustable ladder with steps or movable bars characterized according to claims 6 and / or with any of 9 to 106 where they can optionally also carry said plugs.

108.- Adjustable clamping mechanism characterized in that it is composed of an adjustable clamping means consisting of "L" -shaped arms or angles that can be coupled in pairs, four angles, an angle of each pair comprises a perforation in one of its arms , meanwhile, that the other angle of each pair comprises more than one perforation for the corresponding adjustment, each pair of angles cooperating in a sliding way and being hooked and fixed, by any suitable fastening means, a screw with nut, to the match said perforations as required by the area where it is to be fixed. From each pair of said angles, one of them, the one that faces outwards, comprises supports or bearings in the lower part of the angles for resting against the wall or wall where said mechanism is viable among others to be applied on the ladder adjustable with steps or movable bars, etc., according to claims 1 to 106.