FI69179C - FOERFARANDE FOER TILLVERKNING AV SPIRALARMERINGAR OCH AV DESSABESTAOENDE KOMBINERAD SPIRALMERINGSANORDNING - Google Patents

Description

69179

The present invention relates to a method for producing threaded reinforcements according to the preamble of claim 1.

The invention also relates to a method for producing a composite reinforcement arrangement consisting of such threaded reinforcements.

Threaded reinforcements are used, for example, as shear reinforcement for concrete columns and beams. Such a threaded reinforcement can be made into a continuous elongate structure by winding the reinforcing steel like a screw thread around the shaped body. The strength of the reinforcing steel and the helical structure of the reinforcing structure are selected according to the application.

The starting point for the development of threaded reinforcement has been to provide an industrially manufactured product that is as suitable as possible for reinforcing diverse columns and beams.

The prior art for the production of threaded reinforcement comprises the following alternative:

The continuous steel is mechanically wound around a shaped body so that the steel to be threaded is continuously and tightly rolled tightly against the previous threaded circumferential row. In this way, threading into a continuous strip tightly against the previous thread results in a product which is advantageous in terms of storage and transport costs.

Later, when used as reinforcement, the threaded reinforcement is stretched from a uniform tight thread so that the desired thread pitch is smoked. The threaded reinforcement is then cut to a suitable length and bonded to either the main or working steels, making it a finished reinforcement.

ΤΓ 2 69179

Threaded reinforcements have been manufactured by a similar method by threading around a wide variety of shapes.

A rectangle, a polygon or a circle has generally been used as the cross section of the shape. Conical shaped pieces have also been used.

Although the method used offers a very rational method of manufacturing shear reinforcement and has a very wide range of applications, as such it is not particularly well suited for the production of shear reinforcements for diverse elements.

The object of the present invention is to provide a more advanced alternative for the production of threaded reinforcements, which option expands the field of application of threaded reinforcements and is more product-ready and allows direct, automated, individually dimensioned reinforcement.

This object can be achieved by a method according to the invention, which is characterized by what is set forth in the characterizing part of claim 1.

The method of manufacturing the combined reinforcement arrangement, in turn, is characterized by what is set forth in the characterizing part of claim 3.

The methods according to the invention will now be examined in more detail by means of the embodiments according to the accompanying drawings.

Figure 1 shows a perspective view of one threaded reinforcement structure made by the method according to the invention.

Figure 2 shows a threaded reinforcement blade attached to an auxiliary steel.

Figures 3 to 8 and 10 show in cross-sections threaded reinforcement arrangements for various columns and beams.

3 69179

Fig. 9 shows a cross-section of the arrangement according to Fig. 8 with the additional steels fitted in place.

In the production of a single continuous threaded reinforcement, the reinforcing steel is usually wound continuously from the coil around the most suitable shaped body, which is preferably rectangular and elongate in cross section. As the winding point remains in place as the longitudinal shaped body rotates appropriately and as the coil rotation movement or the resistance of the steel increases, the steel deforms around the shaped body.

Compared to the already developed threaded reinforcement threading methods, in the new method, instead of a smooth, continuous axial displacement of the die, the die is jerked so that the displacement can be adjusted to a predetermined size and always during exactly 0 ... 360 degrees of rotation from 0 to 360 degrees.

With this jerky longitudinal displacement, the longitudinal advance of the threaded reinforcement 4-7, i.e. the threaded distance d, is obtained to the desired length, and in addition, the advance always takes place at the same side 7 of the threaded reinforcement. In this case, the length of the threaded reinforcement is made directly corresponding to the desired final length. To this threading step, it is easy to add a longitudinal working steel 2, 3 parallel to the shaped body for later processing of the reinforcing mesh and to maintain dimensional accuracy, e.g. by spot welding with an automatic machine in connection with threading.

The reinforcing mesh manufactured according to the above is thus created by rational manufacturing methods, the thread spacing d being of the desired size, whereby material costs are saved. In addition, the product is already ready to be transferred directly to the mold in terms of reinforcement spiral gap and reinforcement length.

Thanks to the jerky longitudinal displacement, where the propagation d of the thread 4, 5, 6, 7 is always on one side 7, the threaded reinforcement cages of the TT "69179 can be nested with each other without impeding any thread oblique (Figs. 4, 5, 7 - 10). efficient use in a variety of cross-sections, as shown in the above-mentioned example figures.

According to the invention, it is thus possible to produce, for example, such a combined threaded reinforcement arrangement 2-7, 2 'to 7', which comprises two nested threaded reinforcement structures 4 to 7 and 4 'to 7 *. In this case, threaded reinforcing structures 4 to 7 and 4 'to 7' are used in which the planes of the threads 4, 5 and 6 are substantially perpendicular to the longitudinal direction of the threaded reinforcing structures and in which the transition from one plane 4, 5 to the next 6 takes place in a limited area 7 of each thread. I'm doing the same side. For each structure 4 to 7 and 4 'to 7', longitudinal auxiliary steels 2, 3 and 2 ', 3' are fitted and secured in place on the side where said restricted area 7, 7 'is located.

The threaded reinforcement structures 4 to 7 and 4 'to 7' are arranged laterally nested on a side at least partially opposite the side containing said restricted area 7, 7 ', after which the structures are fastened to each other.

Claims (3)

1. A method for fabricating a spiral reinforcement (4 - 7), winding the frame tree used as a raw material, spirally around a molding, characterized in that the position of the molding piece and the feed point of the steel trees are unchanged between the largest the part (4, 5) of each loop (4, 5 and 6), but that the transition from the previous loop (4, 5) to the following (6) occurs by moving the molding and the feeding point relative to each other in the axial direction of the molding. a fairly short portion (7) of the loop, to an extent corresponding to the distance (d) between adjacent turns (4, 5 and 6) of the finished spiral reinforcement (4 - 7). 2. A method according to claim 1, characterized in that said short portion (7) of the loop corresponds to a rotational step of 0 ... 90 degrees. 3. A method of manufacturing a combined spiral reinforcing device (2 - 7, 2 '-7'), intended for concrete elements (1), such as beams or pillars, and comprising at least two at least partially arranged helical structures ( 4-7 and 4 '- 7'), characterized in that - using such helical reinforcement structures (4-7 and 4 '- 7'), the plane of the loops (4, 5 and 6) is substantially perpendicular to the helical reinforcement structure. longitudinal direction and where the transition from a plane (4, 5) to the following (6) in the relevant longitudinal direction occurs along a restricted area (7) of each loop on the same side of the spiral reinforcement structure, - longitudinal auxiliary means are arranged and secured in place. iron (2, 3 and 2 ', 3') inside each spiral alloy structure (4-7 and 4 '- 7') on that side,