IL33632A - Retractable type tunnel mould - Google Patents

Description

NEW RETRACTABLE TYPE TUNNEL MOULD It has already been suggested to use tunnel type metallic moulds in retractable units allowing and demoulding of building cells carrying walls and solid concrete tiling without previously assembling or disassembling the elements forming the said Such tunnel moulds have been described in detail in French Patent of December The subject of the present invention is a new tunnel mould including various improvements with respect to previous achievements in order to make moulding and demoulding Thus the object of the present invention is a retractable type tunnel characterized in that it consists of longitudinal elements movable alon the tunnel to each element being at the vicinity of one of its vertical with two hoists which by means of two racks two brackets two articulated elements and four or horizontal are capable to actuate welded elements below the central elements of a set of four each ulated around an axis attached to the central section of the horizontal panel of said so as to cause the said elements to swivel around special joints at one of their and consequently open said set of and disengage the moulding elements from their top The invention will be better understood by consideration of the following description of one example of a retractable tunnel mould with reference to the attached drawing in which 1 is a transverse in of a tunnel mould element in moulding 2 is a transverse in similar to one in 1 but in demoulding 3 a section along of Seen in 1 is a tunnel mould element prising vertical 1 and 2 which rest against the lateral panels 3 and 4 each comprising an iron sheet and 4b which provide sufficient rigidity to the above mentioned sheets 3a And The 1 and 2 are connected at their lower sections by a articulated at its ends on brackets 6 and further connected to the beams 1 and 2 by means of braces 7 and 8 articulated at one side on 5 at 7 and at the other side on bracket attached to the 1 and The length of the braces 7 and 8 is adjustable by means of a device of a known 9 for demoulding are provided at the lower section of 1 and These screw jacks can be operated at hand Beams like 1 and 2 are also equipped with travelling wheels can slide on their axis so as to remain stationary on the ground whilst beams 1 and 2 can still be brought closer together when the device adjusting the length of the is The horizontal panel 12 consists of an iron sheet 12a and reinforcing elements 12b which confer to the iron sheet sufficient longitudinal This horizontal panel is further supported at its central section by shackles 12c holdin lated axis 13 of the various The ends of these elements are iculated at the top section of X mounted on beams and 2 and which serve as two parallel brackets between which one can place either a central element articulated at 16 on the of the or two external elements articulated at l6 on the brackets of Lower braces cross the two lateral walls at each side of tunnel Two telescopic shores 18 located at the centre of the mould may be fixed into high position by mean s of pins which can be introduced into holes 19 drilled for this purpose in the two concentric elements of the devices which can be operated by means of handles 20 which allow vertical motion of the lower end 21a of the stirrup staap 21 mounted across the 5 thus extending the shores 18 either to bring it down to ground or to put it When in moulding elements and 22 may be connected and fixed into position at 23 by means of pin 23a which can be seen on When the device 5a is operated so as to decrease the length of 5 the two lateral panels 3 and are disengaged from the vertical walls which have just been at their lower It is then enough to operate the crank handle 2k of a hoist to lower a rack element 25 articulated on a bracket 26 sliding on one of the sides of 29 and acting on the ends of two horizontal arms 27 and 27a a 29 articulated at These two arms 27 and 27a are held together respectively with brackets 30 and 30a on the central elements 15 These central elements are interconnected at their lower sections by a which holds a chain 32 on which hangs the pin which fits the holes The upper section of Ik are further provided with angles 33 supporting reinforcing elements 33a on the edges of the tunnel The elements and 22 also support adjustable sprags which can be adapted to the exact width of the lifting fork used to move forward the complete mould after the concrete is According to another version of the not shown in the the mould can also be made extensible in To this each of the external elements of the lazy tongs are made of two concentric bars which can slide within one These bars can be joined to each other by bolts passed through regularly spaced holes provided on each In this version the internal element of each is an section Regularly spaced holes at half the distance between holes on the are drilled along the web of the external and internal elements of the and their central articulation axis is fitted into these This conception of the allows a modular adjustment of their According to this the lower are also extensible in accordance with the same The horizontal floorin under these intermediary which are placed according to the working insufficientOCRQuality

Claims (1)

1. WHAT IS CLAIMED IS ί Retractable comprising a pair members fo supporting a of side and for casting a eaoh frame member comprisin pai o side uprights extensible member con between lower end portions of side upright and a pair o members each articulated an upper end of said uprights and articulated to one another at or near central plane said the pair of members to one of of extendin to other pair of uprights being movable verticall lon other pair of uprights said pai o members being solidly joined by least one section substantially in the of said pair of members to a rack and pinion device to enable lifting or lowering said pair of members respectively to or an Shuttering to Claim wherein eaid articulated members supported by teleaoopic s ruts Shutterin wherei said telescopic struts are provided with adjustable stirrups fitting over said extensible members Shuttering accordin to 7 wher e in said artioulated members to enable the lifting of entire shuttering by means of lift truck or the like and transportation along SPISBACH BOX insufficientOCRQuality