DE8603721U1 - Spacer for structural steel mesh - Google Patents

Description

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BRUHLE '9. · Δ · ΤΪ ASH .Il · Η · 'Α · ΜΌ EL GMBh

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Am Volkspark, "6" - 5040 B rü h I A b stand h a I ter for structural steel mesh

The present utility model relates to a new spacer for attaching to reinforcements made of structural steel mesh.

The function of spacers is to maintain a certain distance between the Reinforcing steel reinforcement to secure it from the surface of the concrete. The size of this distance is partly due to Dl N regulations and partly determined by special regulations of local construction management.

It has now proven advantageous to use such spacers made of concrete, because this is in contrast to plastic parts combine intensively with the fresh concrete and thus become an integral part of the concrete mass, similar to an aggregate bi I den.

So far, however, such concrete spacers were on the reinforcement fastened by being in a cube, cuboid or cylindrical shape A wire was poured into the concrete body, both ends of which were wrapped around the reinforcing steel and behind this were twisted together.

However, this attachment had the disadvantage that when the reinforcement was moved in the case of ceiling formwork or when the concrete was poured into vertical formwork, the concrete forml inge were laterally shifted or overturned or turned around the reinforcing steel. So that they were no longer effective position: the predetermined distance was no longer guaranteed, so that subsequent structural damage caused by rusting reinforcing parts e.itstand ^r -n.

The invention has now set itself the task of addressing these disadvantages to avoid. This was achieved by the fact that the Abslandhal ter (/ ·! On across the Surface of the concrete arranged parts of the reinforcement are attached. The attachment is according to the invention with the help

made of clamping sleeves (B), which form a force-fit connection between wire and concrete cylinder (A) cause «The difficulty here is that the reinforcement wires do not are smooth but ribbed and that experience has shown that very large dimensional tolerances occur. Fenrer should be for economic reasons A special clamping sleeve (B) cannot be used for every wire diameter.

According to the invention, a Kiefrimnüise \ B) has now been developed which has a wave-shaped cross section (6). This causes that, depending on the wire thickness, the shafts (6) are more or less compressed, surprisingly independent from the deviation of the usual wire thickness of an average of 5 mm in the range of 4.5 - 6 mm a perfectly consistent one Clamping effect could be achieved. The section C-C shows the formation of the waveform (6).

Furthermore, if the depth (3) of the bore (2) is more than 1/4 preferably 1/3 of the total length (4) of the concrete cylinder (A), it was not possible to push the attached concrete cylinder (A) through the side To remove force from the reinforcement wire.

So that the attached concrete cylinder (A) is now the one when pouring the forces occurring in the concrete oppose the least possible resistance, they must be designed to be relatively slim will. The length (4) should be at least twice the diameter (5). Furthermore, after the formwork has been removed, it is flawless To ensure visible surfaces of the concrete, the tip (1) of the spacer (A) was dome-shaped in the form of a rounded one formed truncated cone. This ensures that the liquid concrete flows around the rod holder (A) up to the tip (1), so that the spherical rounded tip (I) - similar to a rounded tip Grain of the aggregate is homogeneous in the concrete structure inserts. Due to the slim shape of the concrete cylinder (A) with the rounded tip (1), the "shadow formation" is created when pouring of the concrete is avoided and a uniformly dense structure is ensured.

It has also proven to be useful to insert the clamping sleeve (B)

to be provided with a collar (7), this collar prevents

that when attaching the concrete cylinder (A) to the reinforcement wire

the clamping sleeve (B) can be compressed in the bore (2).

Explanation of the digits to the attached drawing.

A = spacer shown in longitudinal section B = clamping sleeve side view C = section plane through the clamping sleeve D = spacer view from the attachment side

1 = tip of the spacer

2 = hole

3 = depth of the hole

4 = total length of the spacer

5 = diameter of the spacer

6 = cross section or waves of the clamping sleeve

7 = collar of the clamping sleeve

Claims (4)

PROTECTION CLAIMS !. Concrete spacers (A) for structural steel mesh, fastened with a sleeve made of plastic (B), characterized in that de. ' Spacer (A) is shaped as a slim cylinder, the has a spherical and / or conical shape at its end (1) directed towards the outside of the concrete and in that for reinforcement directed end contains a bore (2) which receives a clamping sleeve (B) with a wave-shaped cross section (6). 2.A spacer according to claim 1, characterized in that the outwardly directed end (1) forms a flat truncated cone with a spherically rounded tip. 3.Abstandhaiter according to claim 1 + 2, characterized in that that the depth (3) of the bore (2) is at least 1/4 of the total length (4) of the subscriber handler. 4. Spacer according to claims 1-3, characterized in that that the clamping sleeve (B) with a wel lan-shaped cross-section (6) has a collar (7).