DE20002704U1 - Device for fastening formwork - Google Patents

Description

Inventor and publisher of this novelty

Surname :

First name:

Krautz

wolfgang

Date of birth: 25.07.1967

Residence: 14473 Potsdam, Humboldtring 24

Article name: "Device for fastening formwork" Use:

Material:

Construction / Formwork construction steel / (reusable)

All detailed written explanations with accompanying drawings and the existing utility model were drawn up and produced by the above-mentioned publisher himself!

Description

"Device for fastening formwork"

This "device for fastening formwork" is intended exclusively for small-area formwork, which is offered for hire by the company "PERI GmbH" as a small-area formwork hand set.

The application area of the above-mentioned formwork is on construction sites where concrete walls or foundations have to be poured. The small-area formwork also has the advantage that it can be moved and set up by hand. You do not need any large machines, such as special lifting equipment, cranes, etc. and is therefore ideal for smaller construction sites or construction sites where there is not enough space to use these techniques.

The small-area formwork has so far only been secured against the lateral and floating fresh concrete pressure on the ground (installation area) with wood. This technique, which has been used so far, is briefly shown in Figures 1.0 and 1.1 of the accompanying drawings. These figures show where the horizontal forces (f) and the vertical forces (g) act directly and counteract the pressure from the concrete through the wooden board (e) and the roof batten (d) and the dowels (c) required for fastening.

My suggestion for improvement, for specialists who constantly work with this formwork, is the "device for fastening formwork" made of steel and thus always reusable.

Construction of the "device for fastening formwork".

This "device" consists of two steel plates which are permanently connected to each other by welding.

The dimensions of the upper plate (D) are: length = 250mm; width = 150mm; thickness = 5mm. A slot (S) is also milled into this plate (D), which is 11mm wide and 50mm deep into the material. The holes (B) required for fastening to the substrate have a diameter of 10mm. They are located 67.5mm from the outer edge (width) and 55.0mm from the outer edge (length) in the material.

The dimensions of the lower or second steel plate (E) are: length = 250mm; width = 100mm; thickness = 5mm. This plate (E) also has two holes (B) which are identical to the upper plate (D), lie one above the other and thus the dimensions of the respective outer edges and the diameter listed above can be transferred.

For illustrative purposes, see Figure 1.2.1, which shows the top view of the "device for fastening formwork" , and Figure 1.3, the corresponding sectional view of the accompanying drawings.

How this innovation is to be applied is again shown in Figure 1.2 of the accompanying drawings.

The "formwork fastening device" is inserted with the slot (S) into the formwork rear wall, which has a constant thickness of 5 mm. The upper plate (D) counteracts the vertical forces (g) and thus prevents the formwork wall from being lifted by the fresh concrete pour or its subsequent compaction by concrete vibrating machines.

The lower plate (E) counteracts the horizontal forces (f) and thus prevents the formwork wall from drifting and moving sideways. The lower plate (E) also serves as a height compensation device compared to the thickness of the surrounding formwork wall. If the subsoil is very uneven, additional height compensation plates are required, which have the same dimensions in terms of length, width and holes as the second lower steel plate listed above. Only the thickness of the height compensation plate can be varied between 5mm and 10mm.

The benefits of my invention!

When using the "Device for fastening formwork" , time, money and formwork wood, which is shown in detail in Figure 1.0, are saved.

The "device for fastening formwork", which is made of steel, can be used again and again, which is not possible with the previous conventional wooden variant.

Further accessories for the "device" are the height adjustment plates, which have already been described in more detail and are shown in Figure 1.4.

These height adjustment plates, which are also made of steel, are required to compensate for certain unevenness in the subsurface (base of the small area formwork) so that the "device for fastening formwork" can still be attached to the formwork with a precise fit despite these possible unevennesses.

Improper use of the new product could result in damage to the formwork if tensions that may arise due to unevenness in the subsoil are not compensated for.

Purchase : One-time production of the "device for fastening shackle hinges".

consisting of :

Ix "Device for fastening formwork"
+ Ix height adjustment plate - thickness 10mm
+ Ix height adjustment plate - thickness 5mm

Currently costs around DM 70.00 for individual production. 16% VAT.

However, with appropriate mass production, the costs of production are reduced enormously.

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Conclusion :

The "device for fastening formwork" , which I personally refer to as an anti-buoyancy shoe, as well as the height adjustment plates can be made in different sizes and can therefore be used variably. The dimensions given in the accompanying drawings, which are sketches and are not to be viewed as true-to-scale technical drawings, have been designed specifically for this small-area formwork. These accompanying drawings are only intended to make the previous document easier to understand. The dimensions are given in mm.

--. ¹ I-OS-OO

Legend / List of reference symbols

Figure 1.0; View of the rear wall of the formwork (previously used technique) Figure 1.1; Side view of the formwork walls (previously used technique)

(a) Concrete

(c) Dowel in concrete floor

(d) Roof batten-(is pushed into the formwork and doweled together with wooden board on the substrate

(e) Wooden board (is placed against the outer edge of the formwork)

(f) horizontal forces

(g) vertical forces

Figure 1.2; "Device for fastening formwork" (invention or innovation) (component marked in blue - graphically ready for use)

Figure 1.2.1; "Device for fastening formwork" (invention or novelty) (detail view - top view)

Figure 1.3 ; "Device for fastening formwork" (invention or novelty) (detail view - sectional view)

Figure 1.4 ; Height adjustment plates (top view) Figure 1.4.1 ; Height adjustment plates (side view)

(B) Drill holes for fixing with dowels

(S) Slot for insertion into the formwork rear wall

(D) upper plate of the "device" (anti-buoyancy plate)

(E) lower plate of the "device" (anti-pushing plate)

Claims (2)

1. The protection claims relating to the utility model, the "Device for fastening formwork" are characterized in that - this component consists of two steel plates, upper plate (D) and lower plate (E) - the plate (D) has the dimensions: length = 250 mm; width = 150 mm; thickness = 5 mm, a slot (S) of 11 mm width and 50 mm depth is milled in the middle and has two drill holes (B) each with a diameter of 10 mm - the plate (E) has the dimensions: length = 250 mm; width = 100 mm; thickness = 5 mm, has two drill holes (B) each with a diameter of 10 mm - the drill holes (B) in the plates (D) and (E) are each 67.5 mm from the outer edge (width) and 55.0 mm from the outer edge (length) - both plates, upper (D) and lower (E) with the drill holes (B) identically positioned one above the other and permanently connected by welding - the drill holes (B) are used for fastening in the substrate and the slot (S) is used for insertion into a formwork rear wall. 2. Device for fastening formwork according to claim 1, - the upper plate (D) of the above device represents the anti-buoyancy plate and thus works against the buoyant concrete pressure - the lower plate (E) of the above-mentioned device represents the anti-pushing plate and thus works against the lateral concrete pressure