DE3442918A1 - Spacer - Google Patents

Abstract

A spacer for supporting reinforcement inserts in reinforced-concrete construction. The spacer comprises a concrete composition exhibiting a cement and is formed by portions of an extrudate from an extruder and, for fastening onto the reinforcement inserts, has in each case a binding wire which projects with its free ends out of opposed side surfaces of the spacer. The binding wire is introduced into the spacer by passing it, in its longitudinal direction, through the concrete composition which has not yet hardened.

Description

Password: "Pierced binding wire"

Spacer The invention relates to a spacer for supporting of reinforcement in reinforced concrete construction, made from a concrete mass containing cement and of sections of a extruded strand coming from an extruder is formed and to attach to the reinforcement layers each with the free ends protruding from opposite side surfaces of the spacer Has binding wire.

These known spacers are in their production with a Provided breakthrough which runs in the longitudinal direction of the pressed strand. After the complete The concrete mass is then hardened in a special work step in each case with a section of binding wire introduce with a predetermined length in the opening of the spacer and against to secure accidental falling out. By inserting the binding wire with a However, the special operation makes the production of the spacer expensive.

Spacers have also become known in which the binding wires are used permanently. However, these are cast spacers, at where the concrete mass is poured into molds. To bring in of the binding wire, the binding wire has a V-shaped or U-shaped shape and is pressed into the still soft concrete mass with the apex part first. the both free ends of the binding wire thus protrude from a single side surface of the spacer. When pressing the binding wire into the still soft concrete mass it can happen that the binding wire is pressed in to the bottom of the mold, see above that it later lies on the surface of the outside of the concrete and due to the action of moisture Traces of rust are created, which are imprinted as ugly images on the concrete.

It is also possible that the binding wire is not pressed in deep enough and therefore tears out when fastening.

The invention has for its object to provide a spacer of the To create the type explained at the beginning, in which such disadvantages are avoided and The binding wire can be inserted by machine during the production of the spacer can and is reliably held on the spacer and in a reliable manner in is at a sufficient distance from the surface of the spacer, which later forms the concrete exterior.

This object is achieved according to the invention in that the binding wire by piercing in its longitudinal direction through the not yet hardened Concrete mass is introduced into the spacer. When making the spacers In the extrusion process, the binding wire is thus easily inserted into the still not hardened concrete mass introduced by means of piercing, whereby the binding wire is advanced in its longitudinal direction, and so far that the one free The end of the binding wire protrudes from one side of the spacer, while that second free end of the binding wire from the opposite one Side surface of the spacer protrudes.

The advancement of the binding wire can be done in an advantageous manner be carried out automatically.

The binding wire can be pierced in its longitudinal direction through the concrete mass prior to severing the sections from the press strand in the Spacers are introduced. Before separating the sections from the extruded strand To form the spacers, the concrete mass forms a continuous strand, which allows the binding wire to be introduced in a simple manner. The extruded strand has of sufficient weight to allow piercing with the binding wire, without special supports for the extruded strand are required.

The binding wire can be introduced by machine and across the Take place in the direction of advance of the press strand.

By inserting the binding wires across the direction of advance of the Preßstranges is the insertion of the binding wires before severing the spacers forming sections from the extruded strand possible. The extruded strand can be in a simple manner Way can be advanced on a support without piercing the binding wires to affect when the binding wires in a horizontal plane transverse to the feed direction of the pressed strand are introduced.

The binding wire assigned to each spacer can be from one only after it has been pierced, a section of a storage drum separated from it the coming wire. This is a machine in a particularly simple way Insertion of the binding wire enables since the one from the supply drum incoming wire can be held in a simple manner by the piercing device and the relatively short wire sections only after the extruded strand has been pierced be separated.

The section of binding wire assigned in each case to a spacer can curved arcuately and on a corresponding arcuate path in the spacer be retractable. Through this arcuate design of the binding wire is for Merge the free ends of the binding wire when attaching the spacer Less work is required on the reinforcement inserts.

The binding wire inserted into the spacer can be attached to both of them have free ends tie loops.

With these tie loops, the connection is particularly easy the two free ends of the binding wire possible.

The binding wire inserted in the spacer can be stainless Coating made of zinc, plastic or the like.

exhibit. As a result, a risk of rust is largely eliminated in a simple manner locked out.

The invention is shown in two exemplary embodiments in the drawing shown, namely: Fig. 1 in a schematic representation of an extrusion press with the introduction of the binding wire and the cutting off of the spacers forming Sections, Fig. 2 in a schematic representation of the introduction of the Binding wire, Fig. 3 shows a finished spacer with binding wire inserted therein in side view and FIG. 4 a second embodiment of the introduction of the binding wire in a schematic representation.

The spacer 10 shown in FIG. 3 is used for support from reinforcement inserts in reinforced concrete construction, not shown, to the reinforcement inserts at a predetermined distance from the cladding, also not shown in detail or the like. to keep. For attaching the spacer 10 to the reinforcement insert a binding wire 11 is provided which extends through the spacer 10. The binding wire 11 is done by means of piercing in its longitudinal direction through the Not yet hardened concrete mass is introduced into the spacer 10. This is the binding wire reliably in the spacer 10 after the concrete mass has hardened held. The binding wire 11 is dimensioned such that one free end 12 protrudes from the side surface 13 of the spacer 10, while the other free end 14 of the binding wire 11 from the opposite side surface 15 of the Spacer 10 protrudes. The two free ends 12 and 14 of the binding wire 11 can be brought together, wrapping around the reinforcement layers and by twisting or the like. be connected to each other. This is the spacer 10 reliably held on the reinforcement insert.

The spacer 10 consists of a cement compound containing concrete and is manufactured by extrusion.

The extruded strand 17 coming from the extruder 16 is known in FIG Way divided into sections 18, each section 18 each having a spacer 10 forms.

As can be seen in particular from FIG. 1, the introduction takes place the binding wire 11 into the press strand 17 prior to cutting the press strand, i. e. before the formation of the sections 18. The binding wire 11 comes from a supply drum 19, the cutting of the binding wire to its predetermined length only after the introduction into the press strand 17 takes place. The one coming from the supply drum 19 Wire is directed at its front end and with that front end leading pierced through the pressed strand 17, the feed movement of the binding wire 11 takes place in its longitudinal direction.

After piercing the Preßstranges.17 with the front end of the The wire coming from the supply drum 19 is the wire passing through the press strand 17 Binding wire 11 cut to the predetermined length. The free ends 12 and 14 of the binding wire 11 can then be provided with tie loops 20.

In the exemplary embodiment shown in FIG. 4, the is in each case a spacer 10 associated section of binding wire 11 curved in an arc and can be pushed into the press strand 17 on a corresponding arcuate path. This arcuate design of the binding wire ensures that they are brought together the two free ends 12 and 14 of the binding wire 11 requires less work is.

The binding wire 11 inserted in the spacer 10 can a not shown rustproof coating of zinc, plastic or the like. -exhibit. This largely eliminates the risk of rust.

As already mentioned, the embodiment shown is only one for example, implementation of the invention and this is not limited to it. Much more Many other designs and modifications are possible.

Keyword: "Pierced binding wire" REFERENCE SYMBOLS List: 10 spacers 11 binding wire 12 free end of 11 13 side face of 10 14 free end of 11 15 side surface of 10 16 extruder 17 extrusion bar 18 sections 19 storage drum 20 tie loops

Claims (7)

Password: "Pierced binding wire" Claims: 1.) Spacers for supporting reinforcement inserts in reinforced concrete structures made from a cement There is concrete mass and of sections of a pressed strand coming from an extruder is formed and to attach to the reinforcement layers each with the free ends protruding from opposite side surfaces of the spacer Has binding wire, d a d u r c h characterized that the binding wire (11) means piercing in its longitudinal direction through the not yet hardened Concrete mass is introduced into the spacer (10). 2.) Spacer according to claim 1, characterized in that the Binding wire (11) by means of piercing in its longitudinal direction the concrete mass before separating the sections (18) from the press strand (17) in the spacer (10) is introduced. 3.) Spacer according to claim 1 or 2, characterized in that that the introduction of the binding wire (11) by machine and transversely to the feed direction of the press strand (17) takes place. 4.) Spacer according to one of claims 1 to 3, characterized in that that the binding wire (11) assigned to each spacer (10) from a first after it has been pierced, a section of a storage drum (19) coming wire is. 5.) Spacer according to one of claims 1 to 4, characterized in that that the section of binding wire (11) assigned to each spacer (10) is arcuate curved and on a corresponding arcuate path in the spacer (10) is retractable. 6.) Spacer according to one of claims 1 to 5, characterized in that that the binding wire (11) inserted in the spacer (10) at both of its has free ends (12, 14) tie loops (20). 7.) Spacer according to one of claims 1 to 6, characterized in that that the binding wire (11) inserted in the spacer (10) is a rustproof one Coating made of zinc, plastic or the like. having.