Static structures (e.g. – buildings) – Machine or implement
Patent
1987-02-09
1989-05-16
Murtagh, John E.
Static structures (e.g., buildings)
Machine or implement
E04G 2122, E04C 204
Patent
active
048297372
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a method and a device for building wall slabs from building blocks, with several building blocks, intended for arranging within a layer, being connected to one another and turned over together by fastening on a bearer and being brought with the upper side downwards into their final position in the wall slab.
Such a method is known from the British Patent Specification No. 317,708. Firmly clamping the building blocks on a bearer plate by means of screw clamps and turning over the bearer plate requires heavy manual work and at least two persons. A frame for the placing on of the bearer plate must be changed after applying each layer of building blocks and dismantled and reconstructed after a wall is finished.
The German Offenlegungsschrift No. 2,044,661 describes a mechanical method for building walls, with the building blocks being firmly clamped in a row on an angle rail. This angle rail is pivotable through 90.degree. and mounted on a bearer, with the swivel axis running horizontally in the longitudinal direction. However, the mobility of the bearer in several directions and its shaking movements prevent dimensionally accurate work. The mortar is squeezed away at the side. Placing new building blocks onto the angle rail is made difficult by the inaccessibity of the angle rail.
SUMMARY OF THE INVENTION
In contrast, the object of the invention is to propose a method and a device for placing building blocks more quickly and more accurately and to rationalise this work further. The invention is to make possible to manufacture wall slabs of different size while using different building blocks, with recesses, such as, for example, window and door openings, also being provided in the wall slabs.
This object is achieved by a method which is characterised according to the invention in that the building blocks are turned over about a vertically movable axis extending parallel to the wall slab and are then placed into a prepared mortar bed by lowering to a predetermined height. The axis or shaft of the bearer is fixed in the horizontal direction, so that the accurate locating of the building blocks above the previously laid layer results automatically. Vertically lowering the turned-over blocks hanging on the bearer to a precisely predetermined height results in mortar seams of uniform thickness and the mortar can penetrate into the vertical channels of the building blocks. The bearer can be very long, for example 8 metres, and thus ensures a high output.
According to the invention, a suitable device for implementing the described method consists in the fact that a horizontally movable gantry framework is provided, that the bearer is a turnover table attached winglike to a horizontal shaft, and that the shaft, at its ends, is accommodated in bearings which are guided in a vertically adjustable manner on the gantry framework and each has a drive for a swivelling movement through 180.degree..
The building blocks are placed with very high accuracy by the turning over and the precise mounting of the turnover table. The bearings of the turnover table are vertically guided on the gantry framework and can be set accurately for height. The individual height stages are accurately preprogrammed in accordance with the height of the building blocks used, and after every placement operation the turnover table travels downwards again or--in the case of the lowermost layers--upwards into its initial position at a convenient working height for loading with building blocks. A further feature of the method is therefore that the row of blocks laid out on the turnover table for placement is lifted up or lowered with the turnover table and is placed by turning over after the appropriate height has been reached.
The clamping device for fixing the building blocks on the turnover table consists of a stop bar, attached to the turnover table in the longitudinal direction, and a plurality of clamping jaws which press transversely to the stop bar. The stop bar and the clamping jaws are p
REFERENCES:
patent: Re28305 (1975-01-01), Williamson
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