DE20205592U1 - Formwork spacers - Google Patents

Description

ti* » · ^&igr;! » '·■"·'■

10.04.02 CO/Cu620116GB

Company Thomas Classen
Neerstrasse 19
D 47665 Sonsbeck

Formwork spacers

The invention relates to a spacer between the formwork panels of a permanent formwork (composite formwork) with a profile that creates the distance and with end plates that are fixed vertically at both ends of the profile and can be fastened to the formwork panels.

In conventional formwork systems, an inner and an outer formwork skin are held together by threaded rods, bolts or similar. The inner and outer formwork skin must be removed after the concrete has hardened. To do this, the threaded rods, bolts or similar are dismantled. To prevent them from coming into contact with the hardened concrete, they are provided with a formwork spacer (tension point opening). Disadvantages of conventional formwork systems include:

1. High transport costs due to delivery and removal.

2. High investments through purchase of expensive formwork systems.

3. There is no sensible possibility of object-specific prefabrication of complete walls in production halls.

•&aacgr;. !::· OO

4. The tie openings form cavities in the hardened concrete and thus weak points with regard to watertightness.

5. The inner and outer formwork panels can only be screwed together from the outside using threaded rods, bolts or similar.

6. The inner and outer formwork skin cannot be connected with the spacer.

In composite formwork systems, the inner and outer formwork panels are connected with a formwork spacer. The spacer consists of two or more parts. The inner and outer formwork panels must remain connected to the hardened concrete.

Disadvantages of conventional composite formwork systems include:

1. The spacer parts have to be precisely fitted. This means that they cannot be manufactured by hand.

2. A limited area of application due to manufacturing.

3. Only limited use of formwork (cement-bonded chipboard).

4. The inner and outer formwork panels must each accommodate a part of the spacer and then be mechanically pressed together to form a formwork. The spacer parts can only be attached to the inside of the formwork panel.

The object of the invention is to enable cost-effective production of concrete walls, sills, foundations, etc., to replace conventional formwork systems and to produce composite formwork systems. Furthermore, the object of the invention is to provide a high level of watertightness in the area of the spacers and a storage option for the reinforcement.

This object is achieved according to the invention in that on the Profi! between the end plates, locking plates are attached transversely as water barriers, the diameter of which is smaller than the diameter of the end plates.

The range of uses of this formwork spacer is very wide. It is possible to replace conventional formwork systems and to produce composite formwork systems. This means that anyone can produce smaller or larger structures, concrete walls, etc. on small or large construction sites, regardless of wall thicknesses and wall heights on the construction site or in production halls. When this spacer is used with a conventional formwork system, it is possible to subsequently use the formwork skin as ceiling formwork, for example. This minimizes transport costs. In contrast to the usual tie point openings, the formwork spacer remains in the in-situ concrete. With an existing water barrier, subsequent sealing is only necessary in individual cases.

A particularly high level of watertightness is achieved when the locking discs are arranged in pairs on the profile.

Preferably, it is proposed that there is a free space between the disks of a pair of locking disks, into which at least one reinforcing bar can be placed. This makes the insertion, arrangement and fastening of reinforcements particularly easy.

A particularly simple manufacture and handling of the spacers, whether made of metal, plastic or other materials, is achieved by the fact that the end plates and/or the locking plates are molded onto the profile.

Preferably, it is proposed that the end plates have holes for fastening to the formwork panels or are glued to the formwork skin

The profile can also have a non-circular cross-section, in particular a V-, T- or cross-shaped cross-section.

Embodiments of the invention are shown in the drawings and are described in more detail below. They show

Fig. 1 a first version without water barriers, Fig. 2 the spacer with water barriers,

Fig. 3 the spacer according to Fig. 2 in unreinforced wall and glued to the formwork panels,

Fig. 4 the spacer according to Fig. 2 in the reinforced wall and screwed to the formwork panels,

Fig. 5 is an enlarged view of the perspective drawing in Fig.

The formwork spacer A connects an inner B and an outer C formwork skin. Depending on the application, the formwork skins are connected to the spacer by gluing D, screwing E, riveting, pressing or other methods. The formwork spacer can be of variable shape. Geometrically, the form consists of a middle part F and two outer parts G, which can have any geometric shape. It can also consist of the same continuous geometric shape. The formwork spacer consists of one piece or it is assembled from several parts. The shapes are selected according to the expected forces and the area of application. The material from which the formwork spacer is made is selected in a similar way. It can be concrete,

4.:. _&Lgr; &igr; IUU ₈ J ■/

.4.:. _&Lgr; &igr;

Lightweight concrete, fiber concrete, plastic, steel, aluminum, glass or other material meeting the requirements.

The middle part F of the spacer is formed by a profile, at each end of which a round end plate G is attached in such a way that the profile F stands vertically on the plates.

Round disks H are attached in pairs to the middle part, between which reinforcement bars can be placed. The distance between the two locking disks H of a locking disk pair is equal to or greater than the diameter of the reinforcement bar. Furthermore, the diameter of the locking disks is smaller than the diameter of the end disks. The diameter of the locking disks H is preferably half to a quarter of the end disks G.

Openings are arranged in the outer end plates G to accommodate fastening parts such as screws E, nails, bolts, dowels or rivets, which extend through the end plates and the formwork.

The two outer end plates are permanently attached to the two ends of the middle profile, so that these parts form a single holder.

The middle profile F has a V-, T- or cross-shaped cross-section.

Claims (7)

1. Spacer between the formwork panels (B, C) of a permanent formwork (composite formwork) with a profile (F) creating the distance and with end plates (G) fixed vertically at both ends of the profile, which can be fastened to the formwork panels, characterized in that on the profile (F) between the end plates (G) locking plates (H) are fastened transversely as water barriers, the diameter of which is smaller than the diameter of the end plates. 2. Spacer according to claim 1, characterized in that the locking discs (H) are arranged in pairs on the profile (F). 3. Spacer according to claim 2, characterized in that between the disks (H) of a pair of locking disks there is a free space into which at least one reinforcing bar can be placed. 4. Spacer according to one of the preceding claims, characterized in that the end disks ( 4 ) and/or the locking disks (H) are integrally formed on the profile (F). 5. Spacer according to one of the preceding claims, characterized in that the end plates (G) have holes for fastening to the formwork panels (B, C). 6. Spacer according to one of the preceding claims, characterized in that the profile (F) has a non-circular, in particular a V-, T- or cross-shaped cross-section. 7. Spacer according to one of the preceding claims, characterized in that no water-bearing cavities are formed around the profile (F) after hardening of the concrete etc.