FR2670819A1 - IMPROVEMENT TO TELESCOPIC TUBULAR STAGES. - Google Patents

Abstract

Improvement in tubular telescopic props to ensure better safety. The improvement consists of the addition to the base of the shank of a tubular stopper 15 force-fitted into the tube 8 and welded to the plate 3. The stroke of the slide 7 is thus limited to prevent one from being crushed. the hand between the plate 11 and the nut 6, and the fingers between the slide 7 and the plate 3. The stop also reinforces the base of the barrel which is more resistant to mass hits. It is also possible to put a reinforcement 16 at the head of the slide which is also liable to receive mass blows if the stay is placed slide down. This improvement can be applied to all conventional tubular telescopic props used in particular on Public Works, Civil Engineering, Building etc ...

Description

The present invention relates to the tubular telescopic props used

  in particular on the construction sites of Public Works, Civil Engineering, Building etc. We know conventional telescopic tubular propscomportant a drum consisting of a metal tube whose one end is threaded to receive a colloul'autre end being welded on a turntable and a slide consisting of a smaller diameter metal tube pierced with diametrical holes to receive a brochel'extr 9 mité free being also welded on a platinum In charge la pin is supported on the nut so

  that the length of the forestay can be adjusted to the nearest millimeter.

  To unload the shovel, the nut should be loosened before removing the spindle, but in practice

  mass on the lower part of the fat to make the plane

  tine on the ground and thus release the strut While doing so deforms the

  barrel tube that deteriorates the base of the forestay.

  In this type of sliding frame having substantially the same length

  than the cask (economical design to obtain the maximum

  the length of the forestay for the minimum of material), the sliding plate

  can come into contact with the nut when the stay is closed.

  the strait without special precautions after removing the pin can be crushed the hand between the plate of the slide and the nut,

  if the stay is closed abruptly by the simple weight of the sliding

  se (more than 10 Kg for some props).

  Another risk of accident: The plates are often pierced by a central hole in which one can introduce the fingersce which is very convenient to handle the strut If the slide has the same length as the drum or if it is longer than the barrel (which is often the case, because one thus reserves a guard of ten centimeters to avoid that one can be crushed the hand between the plate of the slide and the nut) e2 2670819

  its lower part can come to crush the fingers that one would have

  deeply introduced into the central hole of the drum's plate.

  The present invention overcomes these drawbacks: A strut manufactured according to the invention comprisesas the conventional struts:

  A barrel with platinum (pierced or not with a central hole) and a nut.

  A slide with platinum (pierced or not with a central hole) and

  diametrical holes to receive the spindle.

  In addition to these traditional elements, it comprises a tubular abutment or one or more stops of appropriate shapefixed inside the

  drum, for example by welding on the plate or on the wall of the barrel tube.

  This stop (or these stops) limits the race of the slide, which has two favorable effects: Even if the slide is longer than the barrel, it can never come close to the platinum of the barrel so the risk of crushing of fingers inadvertently introduced into the central hole of the turntable

du fit is deleted.

  By choosing a slide longer than the barrel of ten centimeters platinum it can never come into contact

  The risk of crushing the hand is therefore eliminated.

  By correctly choosing the shape and dimensions of the

  tubular abutment (or multiple abutments), one can get another -

  result: These stops can be used to reinforce the barrel tube in its lower part which avoids (or at least limit) its

  deformations under the effect of mass shots.

  FIG. 1 represents in longitudinal section a tubular stay

classic telescopic.

  FIG. 2 represents in longitudinal section a tubular stay

  classic telescopic whose security is improved.

  FIG. 3 represents in longitudinal section a tubular stay

Classic telescopic reinforced.

  FIG. 4 represents in longitudinal section a tubular strut

  The classic safety net has improved security.

  FIG. 5 represents in longitudinal section a tubular strut

  telescopic safety net according to the invention Figure 6 shows an alternative embodiment of the

  base of the shaft of a forestay according to the invention.

  The strut shown in Figure 1 in the "closed" position comprises: The fit 1 consisting of a tube 2 on which is welded a plate 3 pierced with a central hole 4, the other end 5 of the tube 2 being threaded

to receive a nut 6.

  The slide 7 consists of a tube 8 pierced with diametrical holes 9 intended to receive a pin 10, and a welded plate 11 pierced

a central hole 12.

  We see that it is easy to be crushed the hand between the plate 11 and the nut 5 of mgme we see that if we introduce the fingers in the hole 4 can be pinched by the lower end of the tube 3 s it falls

brutally on the turntable 3.

  The strut shown in Figure 2 is already more perfected.

  tioned because one can not be crushed the hand between the platen i 11 and the nut 6, nefflela slide 7 has a length 10 cm to 15 cm greater than that of the barrel 1, so that it comes into abutment on the plate 3 in

  leaving a guard of 10 cm to 15 cm between the plate 11 and the nut 6.

  You can not get your hand crushed in this place but we can still

  pinch your fingers between the slide 7 and the plate 3.

  The conventional strut shown in Figure 3 comprises two reinforcements 13 and 14 to prevent the barrel and the slide are damaged by the mass shots when we put or remove the strut without playing on the nut The reinforcement

  13 does not present any inconvenience for the safety By counteron easily sees-

  reinforcement 14 whose length is of the order of 10 cm to 15 cm

  may pinch the hand if it can come too close to the nut 6.

  To maintain the security obtained by the arrangement of Figure 2, it is necessary to lengthen the slide from about 10 cm to 15 cm as represented on the

  Figure 4, which for a same length of a foreart reduces all its stroke.

  The forestay according to the invention shown in FIG. 5 comprises, like the conventional telescopic stay: A drum i consists of a tube 2 with a welded plate 3 pierced or not

  a central hole 4, and a threaded end 5 receiving a nut 6.

  A slide 7 consisting of a tube 8 with diametrical holes 9 des-

  designed to receive a pin 10, let of a welded plate 11 l pierced or not

a central hole 12.

  In addition to these conventional elements, it comprises: For the fltune tubular abutment 15 from a height of 10 cm to 15 cm welded to the plate inside the barrel This stop 15 allows to reserve a guard of 10 cm to 15 cm between the plate II of the slide and the nut

  6, so that you can not get your hand crushed.

  The tubular abutment 15 can also play the role of reinforcement of the tube 2 in the vicinity of the plate 3 For this tubular abutment 15 must have an outer diameter very close to the inside diameter of the tube 2, and must have a wall thickness sufficient to withstand the shots

massive.

  For the slide a tubular reinforcement 16 with a height of 10 cm to 15 cm welded to the plate II inside the tube 8 To be efficacece

  The reinforcement must have an outside diameter very close to the inside diameter.

  tube 8 and should have sufficient wall thickness to

resist the mass beating.

  The tubular reinforcements 15 and 16 can moreover advantageously be force-fitted into the tubes 2 and 8 respectively. Indeed, the hooping effect thus obtained will improve the resistance of the pairs of tubes 2 and 15 and the pairs of tubes 8 and 16.

  Figure 7 is an alternative embodiment of the invention.

  For simplification only represented in longitudinal section the foot of the barrel To ensure safety and reinforce the tube 2 in the vicinity of the plate 3, the tubular abutment 15 can be replaced by a set of washers or metal discs 17 fixed to the the inside of the tube 2, for example by welding Just like the tubular abutment 15, all the

  discs or washers 17 provide security and strengthen the foot of the barrel.

  Pucks are preferable to discs because they allow for

  an opening at the base of the barrel.

  Obviously, the same provision can be adopted to reinforce the

head of the slide.

  The telescopic props according to the invention can be advantageously used for all the uses of conventional props

  because they bring more security and have a greater longevity.

  1 They can thus be used as formwork supports for poured floors as temporary supports for slab-cast floors, as beam formwork supports as temporary shoring of prefabricated beams as drying struts supporting beams or floors after formwork during hardening period

  concrete and in general for all shoring operations.

Claims (6)

R E V E N D I C A T IONS   1) tubular telescopic strutcharacterized by the fact that the foot of the barrel has a tubular stop or not fixed inside the party,   either on the plate or on the inside wall of the tube.   2) telescopic tubular strut according to claim 1 characterized in that the wall of the tube is in contact with the stop over the entire peripheral surface thereof in the z 8 is not susceptible to receive mass shots.   3) tubular telescopic strut according to claim 2, characterized in that the stop is tubular and is force-fitted into the barrel tube.   4) tubular telescopic stay according to claim 2, characterized in that the stop is constituted by a set of washers or a set of disks attached to the inside of the barrel tube, for example by welding.   5) 2 tubular telescopic pole according to any one of the claims   1 to 4 characterized by the fact that the head of the slide comprises a tubular or non-fixed reinforcement inside the tube of the slide,   either on the plate or on the inside wall of the tube.   S) tubular telescopic strut according to claim 5 characterized in that the reinforcement is tubular and is force-fitted in the tube of the slide.   7) telescopic stay according to any one of claims 1 to 5   characterized by the fact that the head of the slide comprises a reinforcement constituted by a set of washers or discs fixed inside   of the tube of the slide, for example by welding.