FR2563998A1 - RESCUE OR SERVICE BOOM FIXED TO THE UPPER END OF A MAT OR LADDER - Google Patents

Abstract

A. RESCUE OR SERVICE BASKET ATTACHED TO THE UPPER END OF A MAST OR LADDER. B. PLATFORM CHARACTERIZED BY A MEANS OF PROTECTING THE PLATFORM AGAINST IMPACT, CONSTITUTING AT LEAST ONE SIDE WALL STOPPER PLATE 2, SUPPORTED BY SPRINGS, BEING MOVED OUT OF ITS NORMAL POSITION WHEN MEETING PLATFORM 1 AND OF AN OBSTACLE, AGAINST THE FORCE EXERCISED BY THE SPRINGS 6 AND THUS ACTIVATS A SAFETY SWITCH 11 OF THE LADDER OR MAST CONTROL, TO STOP THE MOVEMENT OF THE LADDER OR MAST. C. THE INVENTION RELATES TO A RESCUE OR SERVICE BASKET ATTACHED TO THE UPPER END OF A MAST OR LADDER.

Description

Rescue or service platform attached to the end

  top of a mast or ladder.

  The present invention relates to a rescue or service nacelle, oscillatingly hooked to the upper end including a variable length rotating scale, an articulated mat, a telescopic mast or the like. The rescue or service nacelles provided at the upper end of a rotating ladder, an articulated mast, a telescopic mast or the like, for example on life-saving vehicles, are placed in a raised position by the deployment of the rotating ladder or inclined telescopic mast, directly to the place of their use. To disable

  control of the ladder or mat at the point of use

  According to the state of the art, the nacelle comprises a crash safety means integrated with the lower point of suspension of the nacelle at the top of the ladder or the mast. The gondola that is normally found

  in a vertical position, tilts out of its vertical position

  holds when she encounters an obstacle and thus operates

  the nacelle safety means provided on the corresponding part

  of the ladder or mast. The disadvantage of this solution is that for the different lifting angles

  of the ladder or the mast, we have different shock forces

  annuities that are low in value and may increase

without limits.

  The object of the present invention is to create a rescue or service nacelle comprising a means of impact safety for the nacelle, the construction of which is simple and which causes a certain break in the control of the ladder or the mast for forces. low and regular shocks exerted

on the basket.

  For this purpose, the invention relates to a nacelle of the above type, characterized by a means of protecting the nacelle against shocks, consisting of at least one thrust plate side walls supported by springs, being at the level of the active face of the nacelle, that is to say substantially on the opposite side of the rotating ladder or the like, at the level of the oscillating fastening means of the nacelle, the thrust plate of the lateral walls supported by springs, being displaced out of its normal position when encountering the basket and an obstacle, against the force exerted by the springs and thus actuates a safety switch of the control of the ladder or the mast, to stop the

movement of the ladder or mast.

  Thus, the invention makes it possible to associate a security means with very sensitive shocks for the nacelle.

  to a great protection of the nacelle proper.

  According to an advantageous development of the invention, the nacelle comprises at least one nacelle ladder, foldable about a lower transverse axis of the nacelle, scale which in the upwardly folded position, forms a segment of side walls of the nacelle and may engage an adjacent side wall abutment plate to actuate the safety switch through the abutment plate when

the ladder meets an obstacle.

  This allows using simple means and using the existing scale in all cases, to create a shock zone, wide, reaction on the circuit

control of the nacelle.

  In principle, it is sufficient that the nacelle has sidewall shock zones, because the forces exerted during shocks generally act laterally. Advantageously the side wall abutment plate extends over the entire height of the nacelle. This ensures that the safety mo> in shocks of the nacelle in the longitudinal direction of the nacelle is independent of the place where the nacelle meets the obstacle, and allows the implementation

correct work.

  It is also possible to develop the above embodiment with simple means, if the side wall stop plate corresponds to the area of the upper edge of the nacelle. The impact safety means also switches if the platform encounters

  an obstacle on the side or in its upper part.

  The stop plate can be held preferably only by springs. In this way the stop plate can be prestressed in its normal position by the force of the springs against one or more stops of the fixed wall of the nacelle, so that the springs are subjected to a preload or the stop plate can be fixed without counter-support at the front end of the springs, and in this case the springs

  are not normally prestressed.

  The stop plate may comprise not only a spring support but also tilting axes, fixed; for example, the stop plate can be articulated about a substantially vertical lateral axis at the oscillating attachment of the nacelle

at the wall.

  Advantageously, a large shock zone acting on the control of the ladder is obtained.

2563 998

  if two side wall stop plates are provided on the side and a scale in the middle of

the active area of the nacelle.

  In a variant, it is also possible to provide two lateral ladders and a central stop plate

in the active area of the nacelle.

  A safety switch that operates reliably with low wear is

  a proximity sensor working without contact.

  The invention will be described hereinafter with the aid of two exemplary embodiments relating to the appended drawings, in which:

  FIG. 1 is a schematic side view.

  of a lifeboat; FIG. 2 is a schematic view

  the top of the rescue basket of FIG.

  both an oscillating fastening means; FIG. 3 is a view from above similar to that of FIG. 2 showing another embodiment

  of making a rescue pod.

  The rescue platform shown in FIGS. 1 and 2 is hooked in a vertical position,

  at the upper end of a rotating ladder,

  a variable weight (not shown) of a rescue vehicle and this through an oscillating fastening means constituted by a suspension fork whose end ends before branches define a horizontal axis 12

for the rescue basket 1.

  The rescue pod has an oval section and widens conically upwardly, forming a fixed lateral pod wall 10 which is continuous at the oscillating attachment means 5 and is open on the opposite side. that is, on the intervention side 3 of the service person in the rescue pod; at this point, the basket

has an access opening 13.

  The access opening 13, central is provided with a central scale 8 which can tilt about a lower transverse axis 7 provided on the rescue nacelle. When the ladder 8 is tilted upwards, it forms a segment of side walls of the nacelle 1 and is connected to two abutment plates 2 of side walls, which are adjacent; these abutment plates themselves can tilt around vertical axes 9, lateral, external provided on the wall 10 of the nacelle. When the ladder 8 is folded upwards, the two stop plates 2, side walls are blocked against all

tipping outward.

  The lateral wall stop plates 2 are prestressed towards the outside by a respective compression spring 6, which bears against the

  fixed wall of the nacelle; the side edges correspond to

  of the central scale 8 then form a tilting abutment for the stop plates 2. Safety switches 11 consisting of proximity sensors, without contact, are mounted on the fixed wall of the nacelle, on the opposite side to that the articulation of the stop plates 2; these sensors cut the control of the scale, at the level of the lateral stop plates 2, which arrive at an action distance, close to the safety switches

  1, by an action against the force of the compres-

  6, when the platform 1 meets a lateral obstacle at the intervention side of the nacelle and that in the area of the two end plates 2, side, y

  including the 8 intermediate scale, folded up.

  The abutment zone, protected, associated with the safety of chock,

  is shown in Figure 2 by radial arrows.

  When the obstacle does not directly meet one of the two abutment plates 2, but meets the central scale 8, folded up, this scale is tilted by a small angle around the transverse axis 7, in the clockwise according to Figure 1 thus touching the abutment plate of side walls 2, neighbors, and cutting the safety switch 11 by acting against the force of the compression springs 6. The embodiment of a Another rescue nacelle 1, shown in FIG. 3, provides a central side wall stop plate 2 ', on the useful side of the nacelle, which plate is supported laterally, and at the top and bottom by four leaf springs. compression 6 of the type described above. At each of the compression springs 6, the fixed wall 10 of the nacelle carries a safety switch 11 as described above. The rescue platform also has on the active side of each side of the thrust plate 2 'central, a folding ladder 8' and these ladders can be put against

  the central stop plate-2 'to actuate the

  safety instructors 11 when meeting with a

obstacle located sideways.

Claims (8)

  1) A rescue platform (l hooked oscillatingly at the upper end including a rotating scale of variable length, an articulated mast, a telescopic mast or the like, characterized by a mo) in protection of the nacelle against shocks, constituted by at least one stop plate of side walls (2, 2 ') supported by springs, located at the niteau of the active face of the nacelle, that is to say essentially on the opposite side of the rotating scale or the like, at the oscillating attachment means (5) of the nacelle (1), the spring-side abutment plate (2, 2 ') being moved out of its normal position when the encounter of the nacelle (1) and an obstacle, against the force exerted by the springs (6) and thus actuates a safety switch (11) of the control of the ladder or the mast, to stop the movement of the ladder or mast.   2) Lifeboat according to the claim   1, characterized in that it comprises at least one nacelle ladder, foldable about a lower transverse axis (7) of the nacelle (1), which ladder in the upwardly folded position, forms a segment of side walls of the nacelle (1) and can engage with an adjacent side wall abutment plate (2, 2 ') to actuate the safety switch (11) via the stop plate   (2, 2 ') when the ladder (8, 8') encounters an obstacle. 3) Lifeboat according to the moon   any of claims 1 and 2, characterized in that   that the side wall stop plate (2, 2 ') is   provided over the entire height of the nacelle (1).   4) Lifeboat according to one   any of claims 1 to 3, characterized in that   the side wall stop plate (2, 2 ') / corresponds to the entire upper zone of the nacelle edge. ) Lifeboat according to one   any of claims 1 to 4, characterized in that   the stop plate (2, 2 ') is kept pressed only by springs.   6) Lifeboat according to one   any of claims 1 to 4, characterized in that   that the abutment plate (2) is articulated in a latching manner   lante on the wall (10) of the nacelle around a substantially horizontal axis (9) at the level of the fixing means oscillating (5) of the nacelle (1).   7) Lifeboat according to one   any of claims 2 to 6, characterized in that   it has two side wall stop plates   (2 '), provided on the side and a ladder (8),   central, in the active area of the platform (1).   8) Lifeboat according to one   any of claims 2 to 5, characterized by   two ladders (8 '), lateral, and a stop wall   (2 '), central, in the active area of the nacelle (1).   9) Lifeboat according to one   any of claims 1 to 8, characterized in that   the safety switch (11) is a non-contact proximity sensor for controlling the scale or mast.