FI89093C - FOER FARING FOR ORDERING FRAMSTAELLNING AV ARMERING FOR STAOLBETONGPAOLE - Google Patents

Description

1 89093

Method and apparatus for making reinforced concrete pile reinforcement. - Förfarande och anordning för tranställning av armering för stälbetongpäle.

In the method for manufacturing a reinforced concrete pile reinforcement, the longitudinal end steels of the pile are bonded at a distance from each other by a helical reinforcement running in the transverse direction of the pile, which is fastened at the intersections to the longitudinal end steels.

In the known reinforcement, in which a continuous threaded reinforcement is used, the threaded reinforcement is bonded to the main steels by separate bonding wires. The manufacturing method is laborious, and the rigidity and strength of the reinforcement are not the best possible, because at the junctions the irons bound by the bonding wires can turn slightly relative to each other already under the influence of relatively small forces.

On the other hand, a method is known in which separate threaded hooks are attached to the main steels by welding. This known method is also laborious and slow to perform. Reinforcement manufacturing. . the costs remain high and the method cannot use a low-cost threaded reinforcement per se.

The object of the invention is to provide a method and a device for the production of reinforced concrete pile reinforcement, which enable the production of an optimally strong reinforcement almost automatically with a large production capacity.

This object is achieved by a method according to the invention, the essential features of which are set out in the appended claim 1, and by a device, the essential features of which are set out in the appended claim 3.

In the following, an embodiment of the invention will be described in more detail with reference to the accompanying drawings, in which 2 89093

Figure 1 is a schematic side view of a device according to the invention;

Fig. 2 shows a section taken along the line II-II in Fig. 1;

Figure 3 shows on an enlarged scale a detail of the device of Figure 1 with the device in operation;

Figure 4 shows a side view of a reinforced concrete pile, the reinforcement of which is made by the method according to the invention;

Figure 5 shows four sections taken along the line V-V in the figure.

Before describing the manufacturing method and apparatus according to the invention, reference is made to Figures 4 and 5, which show a typical example of the reinforcement to be manufactured. The reinforcement includes the longitudinal end steels 7 of the pile 10, which may be one or more at each corner of the pile. The number and placement of the main steels 7 also depend on the cross section of the pile, which can be any polygon or even circular. Figures 4 and 5 show a typical square pile. The longitudinal end steels 7 of the pile are bonded at a distance from each other by a transverse helical reinforcement 8 attached at the intersections to the longitudinal end steels 7. The reinforcement thus formed is placed in a pile casting mold in which concrete is poured around the reinforcement.

The main components of the device shown in Figures 1-3 are as follows. For example, four tubular guide members 1 are attached to the support frame 2 so that the tubular guide members together with the support frame 2 form a horizontal mandrel. One end of the mandrel 1, 2 is supported by a vertical pivot 3 89093 on the working shaft 3 and the welding jaws 6 of the electric welding device 4 are attached to the other end. Between 6. In this operating position, the end steels 7 can be fed through the tubular guide members 1 between the welding jaws 5 and 6. A sufficient number of support rollers 11 can be used to support the main steels 7.

When the mandrel formed by the tubular guides 1 is turned on the shaft 3 so that its free end is in a free space outside the welding device 4, a threaded reinforcement Θ can be loaded around the mandrel 1, 2. For technical reasons of manufacturing, transport and handling, the threaded reinforcement 8 is made in such a way that its thread pitch is as small as possible, i.e. the threads can practically contact each other. In this case, the threaded reinforcement required by a long reinforced concrete pile or several successive piles can be accommodated on a relatively short mandrel 1, 2. As shown in Fig. 3, the thread of the threaded reinforcement 8 can be pulled open by using e.g. a gear. shaped stop 9 having a predetermined rotational speed relative to the drawing speed of the threaded reinforcement 8 and the end steels 7 as they are pulled between the welding jaws 5 and 6. By changing the ratio of the pulling speed to the rotational speed of the wheel 9, the distribution of the threaded reinforcement can be influenced, e.g. so that a more frequent distribution becomes at the base of the column.

The initiation of the drawing of the irons 7, 8, in order to weld the first turns of the threaded reinforcement 8 to the main steels 7, can take place more or less by hand with suitable drawing tools. Once the end of the reinforcement has been passed past the welding jaws 5, 6, the drawing can be continued by any conveyor adhering to the reinforcement 7, 8, which at the same time supports the reinforcement formed. Depending on the structure of the jaws 5, 6 of the welding tool, the drawing of the reinforcement 7, 8 can be intermittent or continuous.

It is clear that the structural details of the device according to the invention can also be implemented in ways different from the above-described embodiment within the scope of the following claims.

Claims (5)

A method for manufacturing a reinforcement (7, 8) of a reinforced concrete pile (10), wherein the longitudinal end steels (7) of the pile are bonded to each other by a threaded reinforcement (8) running in the transverse direction of the pile and fastened at intersections to the longitudinal end steels (7). that the longitudinal main steels (7) are pulled through the tubular guides (1) while the threaded reinforcement (8) is pulled around the mandrel formed by the tubular guides (1), that the thread pitch of the threaded reinforcement (8) is substantially increased while the threaded reinforcement (8) is pulled by said guides (1) ) to the welding device (4, 5, 6), and that after the tubular guides (1) the main steels (7) together with the threaded reinforcement (8) are guided to the welding device (4, 5, 6) and welded together at their intersections, Device for manufacturing reinforced concrete pile reinforcement (7, 8), characterized in that the device comprises a plurality of horizontal, spaced-apart tubular ones. guide members (1), on the extension of the other ends of which an electric welding device (4, 5, 6) is arranged so that the intended extensions of the guide members (1) are directed between the welding jaws (5, 6). Device according to claim 2, characterized in that the mandrel formed by the tubular guide members (1) is supported at its distal end from the welding device (4) by a vertical pivot axis (3) on which the mandrel formed by the tubular guide members (1) can be pivoted to free space. 8) can be loaded around the mandrel. 6 89093 Device according to Claim 2 or 3, characterized in that the tubular guide elements (1) are fastened to a support frame (2) at the free end of which the second jaws (6) of the jaw papers (5, 6) of the welding device (4) are fastened. Device according to one of Claims 2 to 4, characterized in that in the region of the welding end (4) side of the tubular guide elements (1) there is a retaining member (9) of the threaded reinforcement (8) which releases the threads of the threaded reinforcement (8) is synchronized with the drawing speed of the reinforcement (7, 8) to be manufactured. 7 89093