FR2638193A1 - Improvement to the safety and working conditions on the masonry trestle - Google Patents

Abstract

Improvement to trestles, characterised in that a twin receiving arrangement makes it possible to position simultaneously the safety elements for the L-shaped brackets and the elevation extension pieces.

Description

IMPROVEMENT OF THE SAFETY AND WORKING CONDITIONS ON THE MACON TRETEAU
Trestles have been around for a long time: crank, ratchet and other lifting trestles also exist.

The present innovation aims to improve the conditions of use of these materials in terms of ergonomics, practicality and safety. The basis of this principle are two tubes fixed side by side on the upper part of the ~ trd- teaux or extension elements. These two tubes can receive side A side and arms. depending on the chosen position and railings and upper extension elements and rolling elements.

Fig. I show these receiver tubes tlJ and {2} on a trestle seen from the side.

For the sake of ease of understanding Figures 3, 4 and 5 should be read rotated at an angle of 90.

Fig. 2 shows the same lifting trestle and the positioning of these tubes situated in the same vertical plane,
Fig. 3 shows an L-shaped console which it is possible to use parts 3, 4, ~ 5 and 6, to be inserted in the housings (1) or (2) according to the desired position. In this same figure this L-shaped console in the low position this mistletoe puts the mason offset in height relative to the work surface (12) of FIG. 2. This work surface can very well be a roller transport system according to fig. 8.This particular arrangement solves the ergonomic problem of the mason but also of horizontal transport of blocks.

Fig. 4 shows this same L-shaped console in another position along the working surface 7.

Fig. 5 shows this same L-shaped console in the reverse position, this mistletoe provides an elevation to the mason with offset. When using this offset, it should be combined with a tripod shown in fig. 2 under number (7)
Fig. 6 shows the same elevation by this L-shaped console facing the interior of the trestle.

Fig. 7 shows this console Indme screwed into one of the rear tubes of the trestle which can be used as a raised work surface preferably with concrete block running surfaces shown according to fig. 8.

Fig. 8 shows a running surface of concrete blocks which can hang on the L-shaped console according to fig. 7.

Fig. 9 shows an example of a railing support which can be used side by side with the worktop support in one of the receiving tubes (1) or (2>.

Fig. 10 shows a roller transport device identical to FIG. 8 but fitted with removable feet for use on the ground.

Fig. 11 shows the roller transport device schematically installed on the ground.

Fig. 12 schematically shows the L-shaped console of FIG. 7 the railing of fig. 9, the rollers of fig. 8 installed behind the mast for the supply at hip height.

This description mainly concerns the equipment used for work on a floor. In case of elevation the 2 receiving tubes will again play their full function.

While the fis. 9 remains in place in the receiving tube (2) the mason sheltered from this body-guard will be able to set up the extension extensions, themselves provided with double tubes. These extensions will preferably be inserted into the receiving tube (1) fiq. 1 and braced by a device which can, for practical reasons, simultaneously serve as fis railings. 15. On the extensions of the fiv. 14 will be fixed receiving errtots for the bracing corns guard of fig.15 by the fixing points (11). Once these railings are in place, the railings in fig. 9 can be placed in the receivers (8) and total security implemented for the upper level. The receiving tubes (8J and (9) being the same as {1) and (2) fig. 1, we will find the same facilities and assembly as shown in figs. l to 7.

Claims (2)

10) Trestle known per se, characterized in that each end of the plane do  work, 2 vertical receiving tubes are fixed permanently and that on the side  wall these two tubes can receive in one of the receiving tubes elé  L-shaped console elements provided with positioning means facing the  wall in the other receiving tube the foot of an extension and that on the side  opposite the wall the 2 receiving tubes can simultaneously receive a  inverted L-shaped console element forming a worktop. This yaws  work may be roller ramps, while the other receiving tube  will be the railing rdscptour.  20) Trestle according to claim 1 characterized in that the railings remain  in place in one of the receiving tubes. It is placed in an elevated framework  tor, itself provided at its upper part with receiving tubes identical to  those of the base trestle to receive the L-shaped consoles, frames  breeders, railings. 34) Claim according to claim 2 characterized in that the con treven te-  necessary when placing the elevated frames and making  connection between at least 2 elevated frames simultaneously form smooth and  under smooth.