ES1068916U - Folding ladder (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Folding ladder, of the type of which include two frames articulated as a scissors, one of which has the rungs and is prolonged superiorly in the form of an inverted "U" constituting the gripping element for safety of the operator uploaded to it, characterized in that in the articulation axis of the two frames (1, 2) also articulates an auxiliary tray (10) for supporting tools or various objects, which is folded down when folding the stairs simultaneously with all the steps (7) at these are rotatable around respective axes (8) lying between the corresponding beams (3) and all are related to points equidistant from a tie (9) parallel and intermediate to said beams (3), which are joined in an articulated manner and which advantageously, it is extended inferiorly by determining a support leg on the ground. (Machine-translation by Google Translate, not legally binding)

Description

Folding ladder.

Object of the invention

The present invention, as expressed by the set forth in this specification, refers to a ladder Folding and behaves notable relevant characteristics and advantageous compared to those that currently exist for the same purpose and which can be considered of its kind.

It is an object of the invention to achieve a folding ladder in "folded" position totally, collection occupied a minimum space and that in addition incorporate an auxiliary tray for tool or other support useful, which is also foldable and be integrated in it stair volume.

Background of the invention

Nowadays folding stairs are known of the type formed by two frames articulated by way of scissors, having one of the racks the steps that facilitate access of the user at different heights, while the other frame it only acts as a support and support element in the ground. Also in a known way there is a superior extension in the form of an inverted "U" that acts as a gripping element that Provides maneuver safety.

Sometimes it is necessary to have a auxiliary tray as a support element for various objects which is attachable to the body of the ladder and usually of metallic structure.

Description of the invention

In general, the object folding ladder of the present invention even being of the type above commented presents as special feature the fact incorporate into the articulation axis of the two frames that make up the folding ladder, or scissor, the tray rotary auxiliary for tool or other support objects, so that it is lowered and deployed for operation in the same operation of opening or closing the stairs. The Rungs are also rotatable around individual shafts between the corresponding stringers of its frame, so that occupy the minimum possible space in the ladder position folded, the auxiliary tray behaving as if it were another step and turning simultaneously with others.

All steps and auxiliary tray are related to a parallel and intermediate brace to said stringers, located in a central and interior area to the stairs in deployed position, joining said brace in articulated form to turn simultaneously. This strap can also be extended inferiorly to establish support on the ground in the position deployed from the ladder, acting as a sturdy prop, or A fifth support leg.

Moreover, the articulated frame that is devoid of the steps includes at least one crossbar of assembly in which it advantageously supports the step horizontally higher when the ladder adopts the opening position. This step incorporates an interlocking element in said bar transversal in which it establishes support, being a resistant support especially if the simultaneous turn brace does not reach the ground.

The gripping element for user safety climbed the ladder, is determined by an independent piece preferably of plastic material as are the steps and auxiliary tray, which is inserted at the ends of the frame stringers provided with steps and which is equipped with at least one prismatic depression in its upper face also defining a kind of extra tray as it horizontally positioned in the deployed position of the ladder. Various holes are also provided in the surroundings of said extra tray to also serve as support media for tools or tools

To facilitate the understanding of characteristics of the invention and forming an integral part of this Descriptive report, accompanying some sheets of plans in whose figures, with an illustrative and non-limiting nature represented the following:

Brief description of the drawings

Figure 1.- It is a perspective view of the folding ladder object of the invention, in position deployed

Figure 2.- It is a view similar to that shown in Figure 1 but in folded position.

Figure 3.- It is a partial perspective view, from the upper part of the stairs where the tray is located assistant.

Description of the preferred embodiment

Referring to the numbering adopted in the figures we can see how the folding ladder that the invention proposes is formed by two articulated frames 1 and 2 connected at the articulation points of its stringers 3 and 4 by means of the anchoring pieces 5 which in turn define stops of maximum opening marking the deployment position of the ladder. Said anchoring pieces 5 are fixed with the pins 6 which they cross the stringers 3 and 4.

The frame 1 is provided with a series of 7 steps that are articulated to rotate in axes 8 laid between the stringers 3 of the articulated frame 1. All of them are also articulated connected to a parallel brace 9 and intermediate for simultaneous rotation when folding (see figure 2) or deployed (see figure 1) of the ladder. Strap 9 it can be extended inferiorly until it reaches support on the ground in the deployed or active position of the ladder, thus fulfilling A tough function.

At a level higher than steps 7 and specifically connected to the points of articulation of the two racks 1 and 2, an auxiliary tray 10 is found as a perfect complement to the stairs because it allows to support it objects or tools that the user has to use uploaded to the same, arranged and ordered in different sections provided for this purpose (see figure 3).

The auxiliary tray 10 is integrated in the set of the ladder and is also articulated just like the 7 steps by including two lugs (not visible in the: figures) at its connecting ends as a fork, which are introduced into existing holes for this purpose in their own anchoring parts 5 (see enlarged detail in figure 3). further it is advantageously connected in an articulated way to the brace 9 for rest on it in an open stair position and fold at the same time  that the steps 7 do when the folding of the same.

In the open stair position occurs simultaneously the support of the upper step 7 on the bar transverse 11 of the upper frame 2 lacking steps 7, anchoring to it with the help of an interlocking element 12.

The frame 1 extends beyond the axis of articulation with the second frame 2 configuring an element of held for user safety as usual. But nevertheless, as seen in figure 3, the connecting element of the stringers 3 is made by an independent piece 13 in shape of inverted "U" whose branches are inserted into them and whose upper surface is provided with a depression 14 as extra tray that acquires horizontal position when it is the staircase deployed It also includes holes 15 of support of other tools or tools.

Claims (5)

1. Folding ladder, of the type that includes two scissor-shaped articulated racks, one of which has the steps and is extended superiorly in the form of an inverted "U" constituting the gripping element for operator safety uploaded to it , characterized in that in the axis of articulation of the two racks (1, 2) it also articulates an auxiliary tray (10) for supporting tools or various objects, which is collapsed when folding the ladder simultaneously with all the steps (7) to the these are rotatable around two axes (8) lying between the corresponding stringers (3) and are all related to equidistant points of a parallel and intermediate strap (9) to said stringers (3), to which they are joined in an articulated manner and which advantageously it is prolonged inferiorly determining a support leg on the ground. 2. Folding ladder according to claim 1, characterized in that the articulated frame (2) devoid of rungs (7), includes at least one transverse bar (11) of reinforcement, on which it horizontally supports the upper rung (7) in the position Opening the stairs. 3. Folding ladder according to claim 2, characterized in that said upper step (7) includes an interlocking element (12) in said transverse bar on which it rests. 4. Folding ladder according to claim 1, characterized in that the gripping element is an independent part (13) inserted in the upper ends of the stringers (3) and provided with at least one depression (14) in its upper face which is situated horizontally in the unfolded position of the ladder, acting as an extra tray. 5. Folding ladder according to claim 2, characterized in that said upper face also includes holes (15) for supporting tools or tools.