WO1996035033A1

WO1996035033A1 - Boarding device

Info

Publication number: WO1996035033A1
Application number: PCT/DE1995/000568
Authority: WO
Inventors: Tobias Erz
Original assignee: Tobias Erz
Priority date: 1995-05-03
Filing date: 1995-05-03
Publication date: 1996-11-07

Abstract

A boarding device, in particular for forming arched door and window lintels, has a ground-supported structure that consists of a central stay (1) and of supporting arms (5, 8, 12) joined thereto. At least one boarding panel (11) is supported on and bound to the supporting arms.

Description

Formwork device

State of the art

The invention is based on a formwork device, in particular for creating arched lintels in doors and windows according to the preamble of the main claim. Particularly when using the building material concrete, a considerable amount of formwork is required in the production of arched sills. Usually, a wooden structure is created, which is covered by a formwork panel on the concrete side and this formwork panel is supported downwards by segments sawn out of panels. In some cases, only a construction made of slats and boards is placed under the curved formwork panel, the bending of the formwork panel having to be achieved by additional clamping elements. This type of formwork is so-called lost formwork, ie after the concrete has dried, the formwork is broken up, with only a few parts being used again can be. This type of vaulting is not only costly in terms of the cost of materials, but also in terms of time. This is especially true when there are a large number of vaults to be produced in this way, possibly with different dimensions.

A known formwork device (DE-GM 92 11 195) consists of a plurality of superimposed slats as a formwork panel and a mechanical tensioning element by means of which the slats are held in the curved position. This formwork device has the disadvantage that it is no less expensive than the usual wooden construction, and an additional substructure is always required to keep this arch element in its working position.

In a g attung according to other known formwork device (DE-GM 75 103 16) cross beams are arranged under the curved formwork panel according to the expected load from the concrete, which are designed as truss girders and rest on support arms, which are designed as threaded bolts with connecting straps are bt. Such a formwork device can be reused after disassembly and cleaning, but it is extremely expensive, especially with regard to its assembly. An additional substructure towards the floor is also required here.

In another known formwork device (DE-OS 22 608 47), an "arch plate" is supported downwards at its ends, while the arch itself is interconnected by a large number of points brought together at one point Supports is supported. The individual supports have elongated holes towards the common connection point in order to be able to design the arch as desired. The disadvantage of this formwork device is that when the central screws are loosened, all radial supports are loosened, making individual and fine adjustment almost impossible. In addition, this known device is very complex.

There are formwork panels articulated via hinges for concreting ceilings (DE-OS 33 112 43), in which the hinges are arranged on a height-adjustable central support, this central support having a stand and the height of which can be reduced after the formwork panels have been folded in, that it can be cut from one room to the next by opening the door. Nevertheless, it is extraordinarily expensive and hardly suitable for the production of arched lintels.

In another known formwork device (DE-OS 24 04 503), the flat formwork panel is carried over a triangular construction in which both the horizontal belt length and the support arms forming the triangles can be changed in length by the parts due to corresponding holes for screws can be screwed differently. Here, too, the assembly work is extremely large and an additional substructure is required.

The Erfindun ⁴ gt> and its advantages

The inventive device has the characterizing features of the main claim in contrast, the advantage that the curvature of the formwork panel can be changed by simply adjusting the support arms, which is advantageous both during assembly and during disassembly. Since the chal device has its own substructure, which can have one or more central supports and can be supported on the floor or a window sill or a lower limit of a window opening, there is a large degree of independence from the position of the vertical opening limit of the opening to be arched , since in contrast to such formwork devices which must rest on the side posts, the load is carried from the substructure to the floor in the formwork device according to the invention. It is also easy to arrange several arches next to each other and only to insert individual supports between the vaults at a later time after removing the formwork (for example when building arcades). In any case, very quick assembly is possible, the formwork panel preferably having the width of the lintel to be created, so that the side panels can be attached to both sides of the formwork panel and perpendicularly to it. Of course, such a formwork device can advantageously also be used for the production of a vault in which several such formwork devices are provided next to each other and further formwork panels forming the actual formwork are placed on the associated formwork panels. With a certain width of the associated formwork panels, they can also be arranged next to one another in an abutting manner and serve directly for the formwork. Here, too, the great advantage is that the individual formwork devices can be adapted to the same curvature the length adjustment of the support arms can be made easily.

According to a further advantageous embodiment of the invention, the formwork device can also be used for (simpler) cork floors. The sheet is pressed down in the middle and the outer support arms are brought up. Thus, the outer support arms support the formwork sheet and the cork floor to the side.

According to an advantageous embodiment of the invention, there is a length-adjustable center support, which can be changed in length and to which a cross support is fastened horizontally, the free ends of which serve as support arms pointing in the horizontal direction, for the cross-member having the connection means. While these crossbeams serve as anchors for the curvature of the formwork panel and are thus subjected to tension after the assembly of the formwork device, the other support arms are bent to the underside of the formwork panel in order to then be pressurized in the event of concreting. Of course, according to the formwork device, the invention can also be used in a more cost-effective version without a center support, in that the cross member including the clamping plate is screwed to the wall, for example by means of an angle, for example fastened to the wall with a screw clamp, after which the formwork plate can then be drawn in.

According to a further advantageous embodiment of the invention, the central support with its upper free end serves as a central support arm. The center support is designed so that its length by moving the middle S support arm is extendable, as well as a lower portion on which a foot can be arranged. The cross support can thus assume the height that is intended, for example in the case of circular vaults further down on the central support and in the case of circular segment falls further up.

According to a further advantageous embodiment of the invention, clamps are provided on the cross support for fastening the other support arms, so that part of the support load is transferred from this cross support to the central support. The particular advantage is that the angle that the support arms make in relation to the curved formwork panel can be perpendicular to it, i.e. radially to the circle, which optimally absorbs the load and avoids the risk of the support arm ends slipping on the formwork panel. The clamps can be designed as simple rings through which the tubular support arms are inserted and can be tightened radially by wing screws running in the clamp wall.

According to a further advantageous embodiment of the invention, a clamping plate is used as the connecting means, the formwork panel being clampable between the cross member and the clamping plate. This configuration is used above all when it is a question of semicircular vaults in which the free ends of the formwork panel protrude downward over the transverse support. The smaller the radius of the vault, the longer the ends of the formwork panel that project freely downwards.

According to a further advantageous embodiment of the invention, the sheet metal sheet consists of several interconnectable individual sheets. , whereby the Transporter and the storage of the individual sheets is greatly simplified.

According to another advantageous embodiment of the invention, hinges are provided at the front ends of the formwork panel as connecting means to the cross members, the formwork panel consisting of at least two parts that overlap in sections. This configuration is particularly advantageous in the case of circular segment vaults, in which, depending on the width of the window, the two oppositely hinged S c holding plates overlap in sections in the central region. In order to keep the two formwork panels on top of each other at the voltage given by the curvature, simple bands can be provided at least at the end of the upper formwork panel.

According to a further advantageous embodiment of the invention, the supports, that is to say the support arms, cross support, central support, etc., consist of tubes of different cross-section which can be telescoped for the length change and can then be locked. Of course, such a change in length can also exist via corresponding rows of holes between the parts to be connected, via which these parts are then screwed together. Wing screws penetrating radially through the outer tube can serve as a lock between the telescopically interacting parts.

According to a further advantageous embodiment of the invention, the formwork panel is made of spring steel, preferably stainless steel. This not only results in a long useful life, but also simplifies cleaning of cement and concrete residues and also ensures an even curve causing elasticity. According to the invention, however, the formwork panel can also consist of the usual formwork plywood or else of plastic.

According to a further advantageous embodiment of the invention, at least one angle piece is arranged as a vertical stop on the cross member or formwork panel. This angle piece can either be supported on one of the already existing side posts of the opening to be arched or on the side form panels. Last but not least, such an elbow can also be used to support lateral formwork panels. In addition, the elbow can be connected directly to the side post by dowelling or by tightening using a device that encompasses the post.

According to a further advantageous embodiment of the invention, all supports can be removed to form a transport package, so that as long as the formwork device is not used, it can be stored in a simplified manner.

According to a further advantageous embodiment of the invention, the formwork device according to one of the preceding claims, characterized in that the width of the formwork surfaces can be changed by several parts lying on top of one another and being displaceable relative to one another transversely to the lintel to be boarded. If necessary, the crossbeams can also be changed in length to reinforce them.

Further advantages and advantageous embodiments of the invention can be found in the following description, the drawing and the claims. drawing

An embodiment of the object of the invention is shown with two variants in the drawing and is described in more detail below. Show it:

Fig. 1 shows the first variant in perspective

Side view;

Fig. 2 shows a detail of Fig. 1 on an enlarged scale and

Fig. 3 shows the second variant of the embodiment.

Description of the embodiment

The formwork device according to the invention consists of a central support 1 into which a footrest 2 is telescopically inserted and displaceable in length and can be tightened via a wing screw 3. The footrest 2 has a cross 4. In the upper end of the central support 1, a central support arm 5 is telescopically inserted, which can also be tightened via a wing screw 6. In the upper area of the central support 1, a transverse support 7 is screwed to it, in the two ends of which telescopic horizontal support arms 8 are inserted so as to be adjustable in length, which in turn can be locked by wing screws 6. In addition, 8 horizontal cross members 9 are attached to the outer ends of the horizontal support arms. A curved formwork panel 11 is held by the cross member 9 and is supported in the middle by the middle support arm. Between the middle support arm 5 and the horizontal support arms 8, further support arms 12 are arranged in the case of the exemplary embodiment 2 support arms, which run radially to the formwork panel 11, that is to say meet it at right angles, and which have the end facing away from the formwork panel 11 via clips 13 on the cross support 7 are attached. Depending on requirements, the support arms 12 can be moved in the clamps 13 and locked by wing screws 14.

Clamping plates 15, which can be screwed to the crossbeams, are used to fasten the formwork panel 11 to the crossbeam 9.

In the first variant shown in FIG. 1, the formwork panel 11 is only pushed and clamped between the cross member 9 and the clamping plate 15 for fastening it. The free ends 16 of the formwork panel 11 project more or less downward beyond the cross member 9 in accordance with the circular diameter of the curvature.

In the variant shown in FIGS. 2 and 3, in which a circular segment vault is produced by the formwork device, two formwork panels 11 arranged one above the other are provided, which are connected with their bound ends via hinges 17 to the cross member 9. Depending on the width of the window, the overlap of the formwork panels 11 is different. The free end of the upper formwork panel 1 1 can be connected to the underlying formwork panel 1 1 using a simple band clamp 1 8. As can be seen in FIGS. 1 and 3, the cross member 9 has an outwardly protruding angle piece 19 with which the formwork device can be supported on already existing door or window posts.

All the features shown in the description, the following claims and in the drawing can be essential to the invention both individually and in any combination with one another.

LIST OF REFERENCE NUMBERS

1 center support

2 footrests

3 wing screw

4 pedestal

5 middle support arm

6 wing screw

7 cross support

8 horizontal support arm

9 cross beams

10 -

11 formwork panel

12 support arm

13 clamp

14 wing screw

15 clamping plate

16 free end

17 hinge

18 band clamp

19 elbow

Claims

Expectations

1 . Formwork device, in particular for creating arched lintels in doors and windows

- With a downwardly supporting individual support structure which can be changed in length and has a supporting structure

- With at least two at the ends of the support arms spaced mostly horizontally and parallel to each other and

- With a bendable formwork panel resting on the free ends of the support arms or on the crossbeams, characterized in that the formwork panel (11) at its end sections via connecting means (15, 17) with the crossbeams (9) acting there and thus the associated support arms ( 8) is connected, as a result of which the formwork panel (11) can, if necessary, be arched onto the ends of the support arms (5, 8) or the crossbeams (9).

2. Forming device according to claim 1, characterized in that a length-adjustable vertical support (1) is provided, on which a cross support (7) can be attached horizontally, the free ends of which serve as support arms (8) for which the connecting means (15, 19) having cross members (9).

3. S chal device according to claim 2, dadurc h characterized in that the central support (1) with its upper free end serves as a central support arm (5).

4. Forming device according to claim 2 or 3, characterized in that on the cross support (7) clamps (13) for fastening additional support arms (12) are arranged.

5. Formwork device according to one of the preceding claims, characterized in that a clamping plate (15) serves as the connecting means and the formwork panel (11) can be clamped between the cross member (9) and the clamping plate (15) for its connection (FIG. 1).

6. Formwork device according to one of the preceding claims, characterized in that the formwork sheet consists of a plurality of individual sheets which can be connected to one another.

7. Formwork device according to claims 1-4, characterized in that hinges (17) are provided on each end face of the formwork panel (1 1) as connecting means to the cross members (9) and that the formwork panel (11) from at least two with their free ends in sections overlapping parts.

8. Formwork device according to one of the preceding claims, characterized in that the supports (support arm (5, 8, 12), cross support (7), central support (1), footrest (2)) made of pipes partly different Cross-section exist, which are telescopically displaceable and lockable to each other for the length device.

9. Formwork device according to one of the preceding claims, characterized in that the formwork panel (11) consists of spring steel, preferably stainless steel.

10. Formwork device according to one of the preceding claims, characterized in that at least one angle piece (19) is arranged as a vertical stop on the cross member (9) or formwork panel.

1 1. Formwork device according to one of the preceding claims, characterized in that all components can be dismantled to form a transport package.

12. Formwork device according to one of the preceding claims, characterized in that the width of the formwork surfaces can be changed by several parts of the formwork panel lying one on top of the other and being displaceable relative to one another transversely to the lintel to be clad