DE1983340U - HOLDER FOR CUT-OUTS. - Google Patents

Description

RA.fl34fi3S-iai.se

17th January 1968

Fritz Seeger, 7501 Blankenloch, Eirchstrasse 1

Bracket for cut-outs

The firing concerns brackets that can be attached to formwork required for concreting to fix from Plastic foam existing concrete recess blanks or blocks.

When concreting, the specialist is always faced with the task of leaving out certain 'spaces, i.e. from the cast concrete to keep clear. This is done in a manner known per se in that recess blanks or recess blocks be inserted into the casting space, remain as permanent formwork in the concrete or even after solidification of the concrete must be removed again. ^ - '

In the case of concrete parts produced by the factory, these are generally the displacement bodies which form the recess

made of sheet steel and again, from ^ the. finished, part removed._ So the displacement bodies can. again and again "to be used.

On the building site, the displacement bodies are made of wood in a conservative manner, although of course only simple body shapes are possible. These displacement bodies must be released from the solidified concrete again, which is mostly only possible with a destruction of the molded parts. This is also why it cannot be reused possible because these displacement bodies are generally designed individually, so they can only be used once are. The type of "production and destruction of these recess bodies makes their use very expensive, so that, especially in the case of smaller openings, etc., there is no recess at all when pouring the concrete and the necessary breakthrough is knocked out after the concrete has solidified.

Cut-outs and cut-outs made of "foamed plastic" are also known. Plastic foam is very simple to work with the usual tools for wood and has the advantage that it is very light, therefore easy to use transport and is relatively cheap compared to wood. The removal of such cut-outs or -blocks from the solidified concrete are not difficult due to the soft consistency of the plastic foam.

Cavities or openings in the finished concrete part that are not yet required do not have to be demoulded, but remain closed by the plastic foam until they are used .. - "'""" ~ ^? ~ ^: "

The only disadvantage of this foamed plastic displacement body is that it is difficult to be attached to the formwork, regardless of whether it is made of wood or sheet steel. Most common is the fastening by means of wire, straps or similar, especially in the case of wooden shuttering, the fastening wires being attached to nails driven into the shuttering boards can be. In the case of sheet steel cladding, there is usually the option of turning the fastening wires around to loop the reinforcement bars. This type of fastening, irrespective of whether the cladding is made of wood or sheet steel however, it is very cumbersome, time-consuming and also sets the displacement body made of foamed plastic not absolutely sure. It should be noted that the material has a very low specific weight * so that the bodies float when introducing vo relatively liquid or pulpy concrete and thereby Concrete can penetrate between the formwork and the displacement body. This not only leads to annoying reworking, but may also lead to a falsification of the previously calculated static values.

The furnace has set itself the task of making such Foamed plastic made recess blanks "or -blocks in the simplest way safely with the associated formwork to connect. This is achieved by connecting the brackets with base plates, barbed spikes are.

The base plates of such brackets are connected to their associated formwork by suitable measures. For example, the! Foot plate with a ₅ preferably with a removable foil covered adhesive be provided wodtirch sticking to both steel sheet and = is possible on wooden formwork. Especially for sheet steel formwork, it is also possible to accommodate one or more permanent magnets in the base plate, which are simply placed on the formwork and connect the mandrel to the formwork through their magnetic effect. Of course, it is also possible to nail the footplate to the formwork, for which purpose the footplate is expediently made so large that it protrudes from the mandrel by at least the width of the head of the horn.

As the brackets count towards the lost building material are expediently made of cheap and light material elastic plastic that of rough

Treatment on construction has grown and that too easy can be coated with adhesive "or in which the magnets can also be injected without difficulty. It is also advantageous here that the footplate of a " Bracketj without making holes must, can be nailed to wooden cladding »

The barbed thorn digs itself when it is pushed over the cut-out or = the recess block into the foamed plastic material and prevents with certainty both a floating up and a slipping of the displacement body »It is not necessary here that the barbs are elastic, that is, that they spread apart, if the foamed plastic material is pulled back = but they can be completely rigid, because the plastic foam already has such a high elasticity shows that ei? anchored securely behind the barbs,

Should the recess blanks or blocks in a certain Distance from the formwork, so this is possible with the bracket after the innovation, that a spacer plate that can be pushed over the mandrel and fixed at a selectable distance from the base plate the mandrel is pushed open. This spacer plate is expediently made of elastic plastic (Seichplastik) »This material hugs the shape of the thorn in such a way that it can only be opened under greater force

What can be "moved" by the special shape the opening into which the mandrel is inserted can be supported. The savings cuts or blocks are now pushed over the mandrels up to the spacer plates, whereby a free space remains between them and the formwork, which is filled when concrete is poured. -

In order to be able to fasten both large (high, deep) and small (low, narrow) recess blanks or blocks in accordance with the innovation, it is further proposed that the mandrel shaft is hollow at its barrel end and can be plugged onto the tip of another mandrel. The primary holder connected to the formwork can thus be extended by further mandrels in such a way that it is possible to attach the displacement bodies at a large distance from the formwork or to attach large (high, deep) displacement bodies when the footplate is removed. In order to avoid the necessary removal of the footplates in the latter case, it is advisable to use thorn-shaped; barbed hooks on the. Provide mounts attachable extension pieces, so essentially . - ~~ similarly shaped brackets, but not provided with a base plate. .

The drawing shows exemplary embodiments of the subject of the innovation shown schematically, namely show:

Fig. 1 shows a first Äusfütirungsf orm with a base plate glued to a sheet steel formwork, Pig. 2 shows a bottom view of a base plate, FIG. 3 shows a further embodiment of the base plate _{. 3} FIG. 4- shows a base plate fitted with magnets, FIG

Fig »6 the attachment of a recess block at a distance from the formwork»

A base plate, which is connected to a mandrel 4, is glued to a formwork 1 by means of adhesive 3. The thorn shaft is provided with barbs 5, behind which the material of the foam plastic recess block is located 6 sets. As a result, the recess block is securely and firmly connected to the sheet steel formwork 1, the recess block 6 is so both against the side Movement as well as secured against floating. The base plate 2 can, as shown in Figure 2, executed, be. The large base of the circular base plate 2 favors its adherence to the formwork 1. The central point is Foot plate 2 as well as the foot end of the mandrel shaft 4- with an axial opening 7 is provided into which the mandrel tip 8 of a further holder can be inserted. To a. Twisting or a deep insertion of the to be attached To enable the mandrel, recesses 9 are still made in the footplate, into which the uppermost barbs 10 of the bracket, similar to the footplate According to FIG. 2, the base plate 12 is also constructed according to FIG. 3, but is provided with nail holes 11.

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In FIG. 4, a section of the insertion of permanent magnets is shown 13 shown in a base plate 22. The permanent magnets 13 rest on the sheet steel formwork 1 and adhere by their magnetic effect.

FIG. 5 shows a spacer plate 14 which can be pushed over the mandrel 4 at a selectable depth. Centrally, recesses 1 ^ ₃ 16 are provided in the spacer plate 14 for this purpose. The arrangement of such a spacer plate 14 is shown in FIG. 6, the mandrel 4 being nailed (1?) With a foot plate 12 to a wooden casing 21. A free space 18 remains between the wooden cladding 21 and the recess block 6, which is filled with concrete when pouring concrete.

Claims (8)

Protection claims 1 «Can be attached to the formwork required for concreting Brackets for fixing existing plastic foam Concrete recess blanks or blocks, characterized in that the brackets with base plates (2, 12, 22) connected with barbs (5, 10) provided Arbors (4) are. 2. Brackets according to claim 1, characterized in that the base plate (2, 12, 22) by at least the hammer head width protrudes from the mandrel (4). 3. Holders according to claim 1 or 2, characterized in that that the underside of the footplate '(2) is covered with a pressure sensitive adhesive, preferably with a removable film (3) is provided. 4. Holders according to claim 1, characterized in ₉ -that a '&& or more permanent magnets (13) are housed in the base plate (22). 5. Holders according to one or more of the preceding Claims, characterized in that the Brackets are molded from plastic. -, 6. Brackets according to spoke 1, characterized in that that one over the mandrel (4) can be pushed over and fixed at a selectable distance τοη of the footplate (2, 12, 22) Spacer plate (14) is provided. 7. Holders according to claim 6, characterized in that that the spacer plate (14) is molded from elastic plastic is. 8. Brackets Nagh one or more of the preceding claims, characterized in that the mandrel shaft can be fitted at its foot-end hollow _(7? 9) "and the tip (8) of another dome (4). 9 * mounts according to one or more of the preceding claims, characterized in that thorn-shaped barbed 0), attachable to the ^holders: ¥ erlängerungsstüeke are provided. ^;