FR2837234A1 - Safety device for ladder comprises two stirrups composed of three inverted U's, central U encompassing ladder rung - Google Patents

Abstract

The safety device comprises two stirrups each composed of three inverted U's made from a single piece. The central U encompasses the ladder rung and the U ends are connected together by a hook.

Description

common fixation.

  The safety step for a ladder The present invention relates to a double safety device adaptable to different types of commercial scales with bars of slightly rectangular or square section. Traditionally, a ladder has a number of rectangular or square bars

  welds at both ends on the uprights.

  On a double or triple ladder, it is well known that if the user is at a great height, having only a minimal support surface can cause significant plantar pain

  the consequences of which can be dangerous.

  On the other hand, the inclination of the ladder with the ground constitutes another danger because, depending on its position, the ladder can either slide on the wall where it is supported, or be subject to overturning.

  The device according to the invention makes it possible to remedy these drawbacks.

  I1 in fact comprises, according to the first characteristic, a rapid and secure positioning device, making it possible to widen the seat or the foot of the user will rest. Furthermore, his

  form and its attachment hooks completely envelop the rung of the ladder.

  A second characteristic relates to the inclination of the scale. So, when the user installs it, it will be enough for him to observe the horizontality of the step to ensure that

  the ladder rests on the ground at an appropriate and secure angle.

  According to the particular embodiments, the market can be made up: - either of a light metal such as aluminum, - or of another natural or synthetic material, - or in one piece, - or of two parts , - either of trots parts, - 2 either welded or screwed, or of a system comprising a central element including the bar of the ladder and on

  which fixes the seat of the step with the appropriate angle.

  Figures VI and VII illustrate, among other things, two possible variants.

  The accompanying drawings illustrate the invention:

  - Figure I shows in section the mounting bracket on the ltechelle bar.

  - Figure II shows in section the mounting bracket and the tilt bar.

  - Figure III shows in section ['caliper assembly, tilt bar and surface

seat covered with anti-slip.

  - Figure IV shows in plan the device installed on a bar of the ladder.

  - Figure V shows in perspective the device installed on a ladder.

  - Figure VI shows a variant of the design of the device. The bracket is made up of a single central inverted U including the bar of the ladder comprising two end triangles on which the inclined part and the bearing surface come to rest. These triangles have at one of their vertex an elongation of a curved and welded side on

  itself thus ensuring the installation of the closing hooks.

  - Figure VII represents another variable in the design of the device. The stirrup is made up of a single central reverse U including the bar of the ladder, the tops of the wind dimensions bent and welded on themselves thus ensuring the installation of the closing hooks. The seat is made up of a single welded triangle on the U. With reference to these drawings, the device of the invention comprises: - according to figure I A fastening system composed of two stirrups (figure I) themselves each of a bar n 5 of Aluminum folded along 3 U n 3 and 4 opposite to each other, closed and welded on side n 6 of the first U n 4, thus forming a system

  non-deformable but presenting a flat seat n 8.

  The bar n 2 of the scale n l is inserted on the central U reverses.

  i? - 3 - The locking hooks n 7 to complete the security, close on the end U no 4 allowing a complete wrapping of the bar n 3 of the ladder n l. - According to figure II A tilting system n 9 constitutes for each stirrup figure I) of a bar nl 1 of bent aluminum and welded externally on the U n 4 of the end thereof, presenting with its flat part n 8 an acute angle of the order of 20 thus forming a

triangle n 10.

  - according to Figure III A flat surface n 12 properly mentioned consisting of an aluminum plate which can be of variable length, according to what one wants on the bar n 2 of ltechelle nl, 1S but of constant width, bent and also welded externally on the U n 4

  ends of the caliper (Figure I) thus completing the indeformability of the assembly.

  This surface will be covered with a non-slip system.

  By way of example, the non-limiting device will have the following dimensions: - For the stirrup (figure I) an aluminum bar n S of thickness 1, S at 2 m / m, of width approximately 30 m / m and length of the order of 325 m / m. Wile is folded according to figure I to compose: Two U n 4 of the order of 30 m / m of dimension and one U n 3 central opposite to the U of extremities whose base will be very slightly higher than the bar n 2 of the scale n l. The bar No. 5 closes welded on the side No. 6 of the U No. 4 end of the caliper.

  From a flat n 8 length of about 85 m / m soda on the base of the central U.

  The hooks n 7 pivot and lock on a stopper n 7 bis. The stirrup thus wraps the

  totality of the bar n 2 of the scale n l.

  For the tilt system n 9 and for each stirrup (figure II). An aluminum bar n ll of thickness 2 m / m of width 30 m / m same width as the stirrup figure I)

  and of the order of 180 m / m bent and welded externally on the U n 4 ends.

  s For the surface of the tread seat in figure III an aluminum plate n 12 of thickness of about 2m / m of variable length between 250 and 300 m / m resting welded on the inclined part of the bracket and on the U n 4 of extremities thus forging a base of

around 90 m / m wide.

  Wile will be covered with anti-slip material # 13.

  The device according to the invention is particularly intended for any scale user such as

  mac, ons, roofers, painters, gardeners etc ...

  The whole of this device has the following advantages:

  - Independence from the scale.

- Adaptability.

- Legerete (light material).

- Robustness (indeformability).

  - Security (locking and anti-slip system) r Rev in dication s 1) Safety device for ladder (nl) characterized in that it comprises a seat (n 12) hooking and locking on a bar (n 2) of the 'ladder. 2) Device according to claim n l characterized in that it comprises two stirrups (n 5)

  including the bar (n 2) of the ladder (n l).

  3) Device according to claims n l and 2 characterized in that it comprises for

  each stirrup of stiffeners consisting of 3 U (n 3 and 4) overturned and welded

thus making it indeformable.

  4) Device according to any one of the preceding claims, characterized in that

  that it includes an inclined plane (n 9) allowing a particular installation of

  the scale ensuring a secure stability.

  ) Device according to claim 2 characterized in that it comprises, during the establishment of the ladder, a seat (n 12) flat and horizontal width of the order of 9 cm centered on the bar (n 2 ) from the ladder, welded to the end U's (n 4) of the stirrup. 6) Device according to claim 2 characterized in that it comprises for each stirrup a hook (n 7) whose axis is located on one of the end U and locking on

  the other end U thus increasing the stability of the system.

  7) Device according to claim 5 characterized in that it comprises an anti-slip coating (n 13) on the seat surface (n 12) thus ensuring better security