DE1484142C - Spacers for concrete reinforcement inserts - Google Patents

Description

1 sheet of drawings

Claims (3)

Claims: solved by the measures indicated in the claims. In the spacer according to the invention, any moisture that may have penetrated into the concrete is captured by the conical recess on the end face facing away from the formwork, of the cap holder shaft, so that rust spots on the visible concrete surface are avoided. Instead of plastic caps, caps can of course also be made. 1. Spacer for concrete reinforcement, the stirrup foot ends of which are in plastic caps with an approximately hemispherical bearing surface supported on the formwork and an adjoining hollow holding shaft are used, characterized in that that facing away from the formwork Front side of the holding shaft (26) a conical io another equivalent material who is used Recess (32) is formed. den, for example caps made of non-metallic 2. Spacer according to claim 1, characterized in that on the outer edge of the conical Recess (32) an annular rib (34) is formed. 3. Spacer according to claim 1 or 2, characterized in that between the hemispherical Support surface (24) and the adjoining cylindrical holding shaft (26) a is formed perpendicular to this extending annular shoulder ao (28). rustproof material that prevents moisture penetration. The invention is illustrated below with reference to schematic drawings of an exemplary embodiment explained in more detail. F i g. 1 to 4 show, in different views, details of a spacer according to the invention. The spacer 10 for the reinforcement 20 comprises two stand stirrups 11 made of round steel, which are at a distance soldered from each other to a cross bar 12, welded or otherwise attached. Plastic caps are placed on the foot ends 14 of this stand bracket 11. The spacer 10 The invention relates to a spacer for loading is placed on the formwork 18 at the construction site, clay reinforcement inserts, its stirrup feet and then the concrete reinforcement inserts 20 in plastic caps with one on the shell and with the rod 12, for example treatment supporting approximately hemispherical support- connected by wire 22. The caps 12 are made surface and an adjoining hollow shark 30, for example made of polyethylene or the like. The support shaft are used. surface 24 of the caps 16 is hemispherical A spacer of this type is already known, so that the cap on the formwork 1.8 only (German utility model 1 867 588), in which the one point or only on a very small end face of the holding surface facing away from the formwork rests. This largely avoids any impairment of the plastic caps, either hemispherical to the visible concrete surface,
are shaped or conical, so that the to the hemispherical support surface 24 of the The flow of moisture around the caps is not obstructed. Caps 16 are closed by a hollow cylindrical neck is. This results in an impairment of the bone shaft 26, which has a somewhat smaller visual surface area to fear from rust stains. ser than the support surface 24 has. The resulting There is already a plastic spacer 40 formed ring shoulder 28 favored when it is put on For concrete reinforcement inserts, the caps 16 on the foot ends 14 have been proposed to determine the position (German Patent specification 1 226 275), the one foot and mung of the caps. When putting on the cap above a means for its attachment to the loading 16 moved along a guide so that the retaining armature and in which the intermediate shaft 26 protrudes outwards from this guide, see formwork and reinforcement extending upper 45 while shoulder 28 slides on flanges surface of this foot a paragraph is provided, which is what the cap is held in place. About it after the lower part resting on the concrete formwork, the cap is press-fitted onto the relevant of the foot protrudes and pushed laterally in a sharp foot end 14. Edge ends. This is to avoid, also for easier insertion of the foot ends 14 in that moisture from the interface between 50 the axial hole 30 of the caps 16 is the upper end Spacer and concrete formwork along the upper part of the holding shaft 26 with a conical outer surface the spacer penetrate into the concrete recess 32 provided, the wall of which is inclined after and can get to the reinforcement steel and that extends inside the hole. When the foot end 14 this one rusts. is slightly off-center when it is pushed on In a further known spacer from FIG. 55, it is thus through the wall of the conical recess a bow-shaped reinforcing steel (German Pa- 32 inserted into the hole. Through this conical shape tentschrift 1 135 646), the ends of the legs are concreted in blocks. A disability of the Moisture flow and thus the avoidance of rust stains is not guaranteed. It is the object of the invention to provide a spacer for concrete reinforcement inserts of the type mentioned at the beginning Art to further educate and improve that with certainty annoying rust spots on the concrete surface are avoided. According to the invention, this object is achieved on the basis of a spacer of the type mentioned at the beginning Recognition 32, however, is mainly the penetration of rust-containing moisture along the stand stirrups 11 and Prevented over the outside of the cap 16 to the concrete face. There is one more on the cap 16 upwardly protruding annular rib 34 is provided, which still hinders the flow of moisture reinforced. The annular rib 34 and the recess 32 thus together form a space for collecting moisture that has penetrated the concrete. The ring shoulder 28 also acts as an obstacle for the moisture flow.