SU966196A1 - Form for concreting monolythic roofing - Google Patents

Description

The invention relates to construction and can be used to construct monolithic ceilings on the room as a whole. .

Known formwork and scaffolding for masonry walls, including a panel, cable suspension and spring-loaded supports placed in the cage 1. The disadvantage of this construction is that in case of a split of the lower edge of the seat, the supports are pressed into the cage, which entails deflection or fall formwork, while it is also possible horizontal shift formwork, which is unacceptable by the technology of the device floors.

Closest to the proposed technical essence and the achieved result is a formwork for concreting floors, including a support frame with formwork shields and support devices. neither 2.

However, during the operation of this formwork, horizontal formwork shift is possible, which is unacceptable according to the technology of the ceiling device and reduces the reliability of its work.

The aim of the invention is to improve the reliability of the formwork.

The goal is achieved by the fact that in the formwork for concreting overlaps, including a carrier frame with shuttering shields and supporting devices, each supporting device has a casing with an extendable support beam and a retractable knife parallel to each other and longitudinal located at an angle to the longitudinal axis of the beam. grooves and fingers placed in them, one of which is rigidly attached to the base frame, and the other to the casing, each

15 the knife is made with a regulator of its movement and fixation.

Existence of sliding knives provides fixing of support in working position and excludes the return shift

20 supports when concrete is chipped. The presence of locks on the front face of the retractable knives prevents the formwork from being displaced horizontally from the design position. All this makes it possible to ensure the reliable fixation of the formwork in the design position, eliminating its displacement during the laying and compaction of concrete.

Fig. 1 shows a formwork for concreting monolithic floors.

30 general view; figure 2 - section aa in figure 1; fig. 3 shows the support; figure 4 - section B. B. fig.Z; figure 5 is a node I in figure 1 (the string node). The formwork for concreting monolithic slabs includes a carrier frame 1 having mounting loops 2 for slinging and a cheek 3 for hinging the frameworks of shields 4 with fingers 5. At the ends of frame 1 there are two supporting devices 6, each of which consists of a retractable support beam 7, retractable knife 8, screw 9, nut 10, plank 11, kerchiefs 12 and 13, pins 14 and 1, and casing 16. Finger 14 is fixedly attached to the hole in the corners of the lower part of the ca 17 of the truss 1. Finger 15 is fixed, for example, welded the top plate of the casing 16. The top and bottom plates x casing 16 there are recesses for the passage but Ms 8. Extendable support beam 7 may consist, e.g., of two U-sections interconnected Boba. The bottom with 7 frame 1 is made of two corners, rigidly connected to each other. Vortex formers 18 are attached to the bottom 17 of frame 17 to form a gap in the floor. Channels of the extendable support beam 7, as well as the corners of the lower frame 17 of frame 1, are interconnected: with a gap sufficient for passage of the extendable knife 8. The sliding knife 8 is movable, connected to the screw 9 by means of the yoke 19, the thrust washer 20. On the front edge of the knife there are clamps 21, made in the form of pointed pins. The knife plate is made straight: 1e of the slot 22, and they are parallel to each other and the axis of the screw 9. The lifting unit consists of a sleeve 23, a mounting rail 24 and a tip 25. Telescopic supports are hinged to the screw frame 4 26. Decking works as follows. Crane or other lifting means for the mounting hinges 2 formwork serves to mark the bottom of the overlap of the first floor. In this case, the shields 4 are lowered, the support legs 26 are attached to the frame of the shield 4, the sliding support beams 7 are located to the full depth in the guide boxes, and the sliding knives 8 are raised to the extreme upper position. Retractable support beams 7 and retractable knives 8 are installed into working position with screws 9. Rotate screw 9, pull out knife 8 which slits 22 slide along fixed fingers 14 and 15 through support washer 20 and holder 19. the knife 8 with its front face presses against the front wall of the groove of the extendable support beam 7 and pushes it into the working position. After the support beam 7 is advanced to the working position, the knife 8 continues its movement to the lowest position. In this case, the front edge of the knife 8 comes out of contact with the front wall of the extendable support 7 and rests on the monolithic wall, slamming it into place with anchors 21. By means of the retractable support beams 7 installed in the working position, the formwork rests on the molded monolithic walls. The sliding knives 8 cut the clamps 21 into the solid walls and securely secure the formwork, preventing it from shifting from the design position in the horizontal plane. If the concrete is cleaved under the sliding support beam 7, it cannot last (spontaneously. Turn into the guide box, as it is securely fixed by the sliding knife 8. In this case, the formwork is jammed at the design mark, which prevents its deflection or fall. After the formwork has been installed, the working position is broken off and one of the shields 4 of the formwork is hooked with a cable 24 with a released crane. The shield is placed in a horizontal position on the mark, at the bottom of the ceiling, the stands 26 are disconnected They are in / upright position, creating a support for the edge of the shield. The second one, the formwork shield, is installed in the same way. Then the position of both shields is adjusted and the design positioning of the shields 26 is ensured, then the reinforcement is laid and concrete is laid. a set of concrete overlap required to break down strength, lower the formwork shields in the following sequence. One of the shields is hooked with a crane 24 with a crane. and raise the rack. 26 into transport position. Lower the edge of the shield 4 formwork until then, until he takes a vertical position. Similarly, lower the second formwork shield. Then frame 1 is fastened with mounting loops 2. Retractable support beams 7 are returned to the initial position and extendable: {knives 8 with screws 9. Rotate screw 9, through support washer 20 and. the yoke 19 is moved by the sliding knife y, which slits 22 slides over the fixed fingers 14. and 15. Returning to the highest position, the knife 8 moves away from the wall, comes into contact with the rear wall of the sliding support beam 7 and returns

retractable support beam 7 in the casing 16 at full depth.

The crane forms the formwork to the next floor through a slot, specially left by concrete casting. After the formwork is raised to the level of overlap of the second floor, the cycle of work on the installation of the formwork and the overlap device is repeated.

The use of this formwork expands the technical capabilities and improves the convenience of its operation.

Claims (2)

1. Formwork for concreting a monolithic slab, containing a supporting frame with shuttering shields and supporting devices, so that, in order to improve the reliability of fixation, each supporting device has a casing with a retractable supporting beam and located at an angle to the longitudinal axis beams RETRACTABLE knife with through parallel located between the longitudinal grooves and fingers placed in them, one of which is rigidly attached to the supporting frame, and the other to the casing. 2. The formwork according to claim 1, wherein each retractable knife is made with a control of its movement and fixation. Sources of information taken into account in the examination 1. Author's certificate CCCi 391248, class E 04 G 3/10, 1971. 2. USSR author's certificate number 614198, cl. E 04 .G 11/22, 1977.