DE2032616A1 - Formwork for a concrete light shaft - Google Patents

Description

Formwork for a concrete light shaft

The subject of the invention is a formwork with an inner and an outer shell for pouring a one-piece concrete light well with a bottom, a front wall and two * i Sidewalls.

In the context of the production of prefabricated components for buildings, it is known to produce light shaft parts from concrete and to attach them to the building on site. Is A, this is a lower part with bottom and on three sides circumferential, perpendicular to the ground subsequent low side wall portions, and can be placed on this lower part shells, which are approximately U-shape. Because of their relatively low weight and simple shape, the individual parts can each be stripped and handled in a conventional manner after casting. This requires at least two different formwork for a light shaft, multiple pouring and additional assembly work at the workplace. In addition, when attaching the well-known light shafts, the basement wall must be torn open, which is therefore sensitive to the ingress of water '

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The object of the invention is "a formwork with single To train means so that it allows the one-piece pouring of a concrete light shaft in a simple manner, especially the demoulding after casting with little effort for shuttering and stripping

The object is achieved according to the invention in that at the Outer shell preferably in the area of the front wall arcuate support structure sum tilting the formwork and the formwork is designed ι that the bottom of the light shaft is on top when pouring.

The formwork according to the invention enables the integral casting of the light shaft, ie its production in a single operation. On the arched support frame, the formwork with the completely cast light shaft can easily be sturge after its solidification, ■ .- && 'that the light shaft on - its own bottom at li @ g © B. comes." All formwork parts are easily accessible after tipping. The same applies, of course, to the assembly: the "formwork before pouring, which is also generally possible in a tilted position. This way, it is possible to also create intricate shaping of the light shaft. This can be done with inclined - Bottoms and walls with inclined and / or broken beveled walls, which shape is favorable for draining off iron rainwater.

Advantageously, the inner and outer areas can consist of elements that can be set by means of wedge connections and tension locks. Such connections can be made quickly and are easy to break, ”Baratts revealed. very short switch-on and switch-off times.

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A preferred, robust and low-maintenance embodiment the formwork is advantageous in that their Individual elements are made of steel. This results in an exact dimensional accuracy that reduces the Wall thickness of the light shaft makes it possible. Another Reduction of this wall thickness and thus of the whole Light shaft weight can be achieved in a simple manner that a bracket within the support structure is arranged for a vibrating motor. This is guaranteed good compaction and thus increased strength. Of the Light shaft produced in this formwork thus has a relatively low weight. Whose advantages are low transport costs and the possibility of using normal hoists at the construction site.

An embodiment of the invention is shown in the drawing shown. Show it:

Fig. 1 a formwork for the one-piece pouring of a concrete light shaft, parallel to cut a side wall of the light shaft and

Fig. 2 shows the same formwork in a different one. Sectional view, corresponding to the / section line Ii-II in Fig. Λ

In both figures, the formwork is shown in the casting position. Your outer shell, designated as a whole with 1, and yours as a whole with 2 designated inner shell are supported in this position on a frame structure consisting of angle iron $ to 8. The outer shell 1 and the inner shell 2. are essentially composed of individual walls 1a to e, or 2a to d. At the boundary edges the outer shell walls are facing outwards

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protruding angle rails 10a to c, 11a to c, 12 and 13 appropriate. On the wall 1c of the outer shell, that of the outside of the later front wall of the light shaft corresponds, a U-rail 14 is also provided. The angle rails and thus the entire outer shell are secured by wedge connections 15 and tension locks 16 braced together with the inner shell.

The walls of the inner shell 2 are made of flat iron strips 17 to 23 connected. The whole inner shell is at Clamped together with the outer shell held in the right place.

A also rests on the angle irons 3 »6, 7 and 8 from an angle profile existing frame 24, which is poured into the light shaft and a support for forms a cover grate.

On the angle rails 10c and 11c on the long sides the outer wall shell 1c are attached, an arched support structure 25 is attached on both sides. These The support structure forms a rolling surface when the formwork is tilted with the light shaft after pouring. Within A bracket 26 is attached to the U-Sehiene of the space surrounded by it. It is used for fastening. of a vibrating motor only hinted at 27

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Claims (2)

Pa ten t ¹ a η s ρ r ü che 1 *) Formwork with an inner and an outer shell for casting. A one-piece concrete light shaft with a floor, a front wall and two side walls, thereby geke η η ζ eich η et that on the outer shell (1), preferably in the area of the front wall (1c) an arched support frame (25) is arranged for tilting the formwork and the formwork is designed so that the bottom of the light shaft is on top when pouring. 2. Formwork according to claim 1, characterized in that g e k e η η ζ e i ch η et that the inner (2) and the outer shell (1) by means of wedge connections (15) and clamping Conclusions (16) consist of composable elements. 3 · Formwork according to claims 1 and 2, characterized in that g e k e η η ze i c h η e t that the individual elements are made of steel. 4 ·. Formwork at least according to claim 2, characterized g ek ennz ei chn et that within the support cons trukion (25) a holder (26) for a vibrating motor (27) is arranged. , 209824/0129