WO2017174725A1

WO2017174725A1 - Device for supporting a formwork part, and formwork system for precast concrete parts

Info

Publication number: WO2017174725A1
Application number: PCT/EP2017/058259
Authority: WO
Inventors: Andreas Reymann
Original assignee: Ratec Maschinenentwicklungs- Und Verwaltungs-Gmbh
Priority date: 2016-04-08
Filing date: 2017-04-06
Publication date: 2017-10-12

Abstract

A device for supporting a formwork part has a foot in the form of a magnet element (1) from which a stand tube (3) extends upwards. A support tube (4) which extends transversely to the stand tube (3) and projects laterally beyond the magnet element (1) is secured to the stand tube (3). The stand tube (3) and the support tube (4) are connected together by a node connector (5) such that the height of the support tube (4) over the formwork table can be adjusted. A formwork part (8) can be attached to the projecting end of the support tube (4) such that the formwork part is suspended over the formwork table.

Description

5

i o Ratec Machine Development and Management GmbH

15 device for holding a scarf part; Formwork system for precast concrete elements

The invention relates to a device for holding a formwork part for use in a formwork system for precast concrete elements, in particular a formwork system with a base plate or a formwork table made of magnetizable metal and with magnetic bodies which can be placed on the base plate or the formwork table. The magnetic body can either be part of the formwork itself or serve for fastening or positioning of the actual shuttering walls.

WO 98/36885 describes such a formwork system for concrete parts with a base plate on which magnetic bodies are adhesively placed, via which a formwork with the magnetic body flanking walls on the base plate to secure 30.

EP 0 639 686 A describes a formwork system for production plants, with which a large number of precast concrete components can be manufactured quickly and efficiently. From individual formwork elements is needed Assembled formwork and secured by appropriate bracing or Ankoppelelemente with magnets on the steel base plate.

The magnetic body usually have a housing with U-shaped cross-section 5, in the interior of a strong magnet is arranged vertically displaceable. By a pressure or impact on an above projecting from the housing actuator of the magnet is lowered to the base plate or the formwork table. By means of the same actuator, the magnet can also be released from the ground again, but i o the strong magnetic adhesion must be overcome.

If the concrete part to be manufactured has a simple geometry, such as a rectangular parallelepiped, the formwork, in the simplest case, consists of two longer and two shorter shutter walls, which span a rectangle. 15 More complicated surface formations, however, require additional formwork parts. The more complicated the shape of the concrete part, the more difficult it is to create an exact formwork.

Modern advanced formwork systems work with shuttering robots.

In this case, the individual formwork parts including the magnetic body are automatically positioned by a robot on the base plate or the formwork table and also removed or collected after casting. The advantage of such a robot system is, inter alia, that the positioning of the scarf parts is extremely accurate and independent of

25 manual work on the construction site.

If precast concrete parts have stepped edges, the shuttering wall must also be correspondingly stepped. This means that formwork parts must be arranged one above the other and laterally offset against each other in several levels. This is a particular problem for a robot. Contain the concrete parts reinforcements or reinforcements made of iron or steel, the production and the formwork is even more complicated. For certain applications, for example, to meet special building regulations, the reinforced concrete must survive on the finished concrete part outside to later serve as connection or connection elements for other concrete parts.

This results in the requirement that the shell wall openings or recesses through which the ends of the reinforcing bars are passed to the outside. Special formwork parts, which are designed in the manner of a rake or consist of hollow module chambers are used for this purpose. A particular problem arises when such additional formwork parts must not rest on the formwork table, but are to be kept floating freely above the formwork table, while being offset inwards relative to the formwork parts which form the outer walls must be arranged simultaneously.

15

In practice, and in particular on construction sites in the open air, it is not always possible to meet all requirements with an automated robot formwork system, in particular if complicated precast concrete elements and / or those with steel reinforcement are to be manufactured precisely and at the same time rationally.

The object of the invention is to provide a highly flexible formwork system for the production of precast concrete parts, which also have more complicated geometry, in particular step-shaped edge areas, and / or armor strips.

25 sen that protrude a piece of the finished concrete part of the surface. The formwork system should in particular be suitable for being assembled at least partially by means of a robot. Above all, a formwork system that consists of as few individual parts as possible and that ensures the precision and speed of a robot

30 formwork system with the flexibility and individuality of a conventional formwork system. Another object is to provide a universal holding device which is adapted to hold special and / or additionally required formwork parts such as module chambers or rake-like formwork parts with openings and / or recesses freely floating or "flying" on the circuit board.

The described technical problems are solved by the device specified in the first claim and the modular formwork system specified in claim 10, which comprises at least one holding device according to claim 1.

The device according to the invention has a foot that corresponds in shape and function to a magnetic body, which is thus designed to releasably fix the holding device on the formwork table by means of magnetic force. From the foot or magnetic body, a stator tube extends substantially vertically upward. At this stator tube, a support tube is attached, which extends transversely to the stator tube in a substantially horizontal direction. It is important that the support tube projects a little beyond the magnet body. The stator tube and the support tube are interconnected by means of a node connector such that the height of the support tube above the formwork table and the lateral projection of the support tube via the magnet body is adjustable. A arranged on the projecting end of the support tube receptacle is used to attach a scarf part such that this scarf part floats above the formwork table. Due to the lateral Auskra- tion of the support tube, the attached scarf part can optionally be arranged inwardly, that is, in the direction of the precast concrete to be cast, staggered to produce in this way a precast concrete with a stepped side wall. The magnetic body preferably has a housing with a cross section in the form of an inverted U, which houses in its interior one or more holding magnets. The magnets are movable in the vertical direction as in a conventional magnetic box, so that they by a pressure or a blow on a projecting from the top of the housing actuator can be lowered onto the magnetizable base plate or the formwork table. In order to release the magnetic body and thus the holding device from the ground again, the magnetic adhesion must be overcome; For this purpose, a sufficiently strong tensile force must be applied to the actuators connected to the magnets.

Advantageously, the magnetic body has on its upper side a receptacle into which the stator tube can be inserted or inserted. This has the advantage that the stator tube can be separated relatively easily from the magnet body so that both parts can be stored and transported in a space-saving manner. In principle, it is of course also possible to permanently connect the stator tube to the magnetic body, for example by welding or riveting.

15

The connecting the stator tube and the support tube node connector advantageously comprises two pipe clamps, one of which encloses the stator tube and the other clamping the support tube. By opening and closing the pipe clamps, both the height of the support arm and the extent of the lateral projection can be adjusted quickly and easily, so that the formwork part attached to the end of the support arm can be moved in two dimensions, namely in the Y direction and in the Z direction. Direction can be freely positioned. The adjustment in X-direction is done by moving the magnetic base on the formwork table.

25

The receptacle at the free end of the support tube is preferably formed as a cross-sectionally Z-shaped rail, which is provided with recesses for fastening screws. Alternatively, the receptacle can also be designed as a grooved rail, which facilitates the exact positioning of the mounted scarf part in the X direction.

Particularly preferred is an embodiment in which the support arm in the region of its free end has a tilting joint, which expediently means Clamping lever can be detected or released. As a result, the attached formwork part can be tilted so that it forms an obtuse or acute angle with the plane of the shuttering table. Precast concrete elements with sloping end walls can be easily manufactured.

A further developed embodiment of the holding device according to the invention comprises two horizontal support tubes, which are fastened to the same upright tube by means of a second node connector. In this way, even two scarf parts can preferably be positioned in parallel over one another at a distance above the formwork table.

The usual magnet boxes are available in different lengths; However, they are usually quite narrow. In order to increase the tilt resistance of the holding device according to the invention, its foot or magnetic body can have supports arranged on its end faces, which increase the stability and tilt resistance to the side. In particular, the support tube can then be formed longer or continue to extend in the horizontal direction, so that even larger distances between the magnetic body and attached formwork part can be bridged without the risk that the construction tilts.

The formwork system according to the invention comprises at least one formwork table or a base plate made of magnetizable metal and at least one, in practice usually a plurality of magnetic bodies with formwork walls attached thereto, which stand upright on the formwork table. According to the invention, the formwork system further comprises at least one holding device with the features of patent claim 1, ie a magnetic body as foot, a stand tube, at least one support tube, a node connector connecting the two tubes and a receptacle arranged on the projecting end of the support tube for mounting a further formwork part or Additional scarf part, which should be positioned floating or "flying" over the formwork table. The conventional components of this scarf system, ie the magnetic boxes with scarf parts mounted on them, can be automatically placed on the scarf table and precisely aligned by means of robots as so-called "robot scarfing". The special devices according to the invention for holding a floating additional scarf part can then be set up by hand in front of one of the exactly positioned magnet boxes and parallel or at right angles to them. In this way, the additional scarf part is positioned exactly, although the holding device was not stopped by the robot. All in all, this creates a highly flexible formwork system that combines the exactness of a robot formwork with the flexibility and individuality of a conventional, manually set formwork system.

Embodiments of the invention are described below with reference to the accompanying drawings. Show it:

15

1 shows a device for holding a scarf part, in perspective view;

Figure 2 shows the device according to Figure 1 with additional tilting joint and

20 mounted formwork part;

3 shows a first formwork system with two holding devices according to Figure 1;

Figure 4 shows an alternative embodiment of the holding device with two

Support arms for attaching two formwork parts;

FIG. 5 shows a second formwork system with a total of seven holding devices according to FIG. 1.

30

Figure 1 shows an essential element of the formwork system according to the invention, namely a universally usable device for holding a Scarf part, in particular a free-floating scarf part, in perspective view.

The holding device according to the invention comprises a magnetic body 1 with 5 a housing with a cross section in the form of an inverted U. This magnetic body 1, which corresponds in principle to a normal magnetic box, on a (not shown) base plate or a formwork table made of magnetizable metal and forms as it were the foot of the holding device. In the interior of the magnetic body 1 is a (not visible here) i o strong magnet, which is movable in the vertical direction. When pressure is applied to a displaceably mounted actuating element 2, which is connected to the holding magnet in the interior, the holding magnet lowers onto the surface of the switching table (not shown). In this way, the magnetic body 1 is positioned or fixed on the formwork table by means of magnetic force. The magic

15 net body 1 can also be solved again by the actuator 2 is pulled up, possibly by grasping under a fork-shaped lever tool. Of course, the relatively strong adhesive force of the magnet must be overcome.

The magnetic body 1 has a recess, which here has an exemplary circular cross-section and is arranged approximately in the middle of the longitudinal extent of the magnetic body 1. This recess serves as a receptacle for an inserted vertical stand pipe 3. This has here round cross-section, but could for example also have a square profile. The stator tube 3

25 is perpendicular to the top of the magnetic body 1 and thus also perpendicular to the (not shown) formwork table. A side and / or front or rear inclined arrangement of the stator tube 3 is conceivable.

This tube 4 can, as shown here, but not necessarily have the same cross-sectional shape as the stator tube 3. The support tube 4 preferably extends horizontally to the (not shown) formwork table and parallel or approximately parallel to the top of the magnetic body 1. Again, it would be conceivable that the support tube 4 instead of orthogonal with a (not too large) inclination relative to the magnetic body and / or the vertical stator tube 3 extends.

5 The two tubes 3 and 4 are connected to each other by means of a node connector 5; in the embodiment shown here such that the axes of the two tubes are mutually orthogonal. The (horizontal) support tube 4 does not run parallel to the magnet body 1, but approximately at right angles to its longitudinal sides. Thus, the magnetic body 1 extends in the direction X, the stator tube 3 in the Y direction and the support tube 4 in the Z direction, in Figure 4 to the rear. Also conceivable is an extension in the Z direction under a (small) angle.

The node connector 5 is formed so that it is penetrated by both tubes 3 and 4, without penetrating the tubes. This makes it possible to move the support tube 4 both in its vertical position relative to the stator tube 3 and to adjust the horizontal position relative to the magnetic body 1 and stator tube 3 variable. The - in Figure 1 rear - end of the support tube 4 can thus be freely positioned both in the Y direction and in the 20 Z direction.

The node connector 5 represents a threaded coupling. The node connector 5 preferably comprises two pipe clamps, which clampingly surround the pipe 3 or the pipe 4 and can be closed more or less by means of screws. In this way, the horizontal and vertical position of the support tube 4 can be adjusted by loosening and tightening a single screw.

At - in Figure 1 - the rear end of the support tube 4, an interface or 30 receptacle 6 is provided for the cultivation of special scarf parts or additional scarf parts. In this example, the receptacle is formed by a cross-sectionally Z-shaped rail 6. This rail 6 has a recess in which one or more fastening screws 7 are used. through a handle can be the screw 7 actuate so that the (not yet visible) scarf parts can be quickly and easily connected to the fixture. FIG. 2 shows the holding device according to FIG. 1 together with a formwork part, which by way of example here is a flat formwork board 8 made of wood. In the region of the rear end, the support tube 4 has a tilting joint 9, which can be locked or released by means of clamping levers. To the rail 6, the board 8 is releasably secured by means of a screwed-on groove rail 10. The formwork board 8 hovers or "flies" freely over the formwork table (not shown). At the same time it is inclined, thus forming an obtuse angle with the plane of the shuttering table. This makes it possible to produce a precast concrete part 1 1, which has an inclined end wall. FIG. 3 shows the use of two holding devices according to FIG. 1 in a somewhat more complicated formwork system which, in addition to a long magnet box 12 with a plurality of holding magnets, comprises a narrow additional formwork part 13. This additional scarf part 13 extends parallel to the formwork table 14, but hovers over this at some distance. At the same time, the additional scarf part 13 in the Z-direction is quite a distance relative to the magnetic box 12 to the rear, that is, in the direction of the precast concrete element, arranged offset. In this way it is possible to produce a precast concrete part with stepped side wall, from which angled reinforcing bars or reinforcing bars 15 protrude.

Figure 4 shows an alternative developed embodiment of the holding device according to the invention. Compared to the embodiment shown in Figure 1 and described above, the embodiment shown here comprises two horizontal support tubes 4a and 4b. Both are arranged by means of node connectors 5a and 5b on the single stator tube 3 slidably. With this special Magnetfußhalter two additional scarf parts 16 and 17 at different heights and in depth staggered freely floating above the (not shown) formwork table position. The Rear and upper additional scarf part 17 can moreover be tilted, because the upper support tube 4b is equipped with a tilting joint 9a.

FIG. 5 shows a second formwork system in which a total of seven 5 holding devices according to the invention with magnetic bodies 1 are used. These hold additional scarf parts in the form of a slotted solid comb 18a and 18b at a distance above the formwork table 14. Two further holding devices with magnetic bodies 1 carry a transverse over two parallel magnetic boxes 12 away leading bracket formwork 19 with square cross-section. The left magnet box 12 fixes a module comb 20, which consists of a number of hollow, juxtaposed boxes with slots in between. The slots of the solid combs 18a, 18b and the module comb 20 serve to allow reinforcing bars to pass through the formwork wall to the outside. At the module comb 20 indicate the depth of the individual boxes

15 space for the protruding from the precast concrete ends of the reinforcing bars 15 (see Fig. 3).

FIGS. 3 and 5 show, by way of example, complex formworks consisting of shell elements set by means of robots (so-called robot forms) and

20, which are then added manually, are composed. The holding device according to the invention with magnetic base is an essential element and creates the conditions for linking robot formwork and manually positioned additional formwork elements with each other. In this way, a robot formwork system can be used

25, where such a system alone does not offer the required flexibility, in particular includes special "flying" additional formwork elements.

Claims

claims

Device for mounting a scarf part, characterized by a foot in the form of a magnetic body (1) which is designed for releasable attachment to a formwork table (14) by means of magnetic force, a stand pipe (3) extending from the magnetic body (1) in the vertical direction extends upwards,

at least one support tube (4) fixed to the upright tube (3) and extending transversely of the upright tube in the horizontal direction, the support pylon projecting beyond the magnetic body (1),

at least one node connector (5) connecting the upright tube (3) and the support tube (4) such that the height of the support tube above the formwork table (14) and the projection of the support tube are adjustable via the magnet body (1),

a receptacle for mounting the scarf part (8, 13, 17, 18a, 18b, 19, 20) arranged at the projecting end of the support tube (4) so that the scarf part floats above the formwork table (14).

Apparatus according to claim 1, characterized in that the magnetic body (1) has a housing with a cross section in the form of an inverted U and in the interior of the housing one or more magnets are arranged vertically displaceable.

Device according to one of the preceding claims, characterized in that the magnetic body (1) has on its upper side a receptacle for releasably securing the stator tube (3).

Device according to one of the preceding claims, characterized in that the node connector (5) comprises two pipe clamps, which enclose the stator tube (3) or the support tube (4) by clamping.

Device according to one of the preceding claims, characterized in that the receptacle for the scarf part as a cross-sectionally Z-shaped rail (6) is formed, which has recesses for fastening screws (7).

Device according to one of claims 1 to 4, characterized in that the receptacle for the scarf part comprises a groove rail (10), sit in the longitudinally of the groove displaceable mounting screws.

Device according to one of the preceding claims, characterized in that the support tube (4) in the region of its free end has a tilting joint (9).

Device according to one of the preceding claims, characterized in that on the stator tube (3) has two parallel support tubes (4a, 4b) are fastened by means of a respective node connector (5a, 5b).

Device according to one of the preceding claims, characterized in that the magnet housing (1) has at its end sides laterally projecting supports, which run parallel to the projecting support tube (4).

Formwork system for precast concrete parts comprising

a formwork table (14) of magnetisable metal,

at least one magnet body (12) with a scarf wall attached on the inside, at least one device according to claim 1, which stands outside the magnet body (12) on the formwork table (14) and is arranged such that the support tube (4) projects beyond the magnet body (12), at least one additional scarf part (8, 13, 17, 18a, 18b, 19, 20), which is attached to the projecting end of the support tube (4) and at a distance above the formwork table (14) is arranged to float.

Formwork system according to claim 10, characterized in that the device according to claim 1 with attached additional scarf part (13, 18a, 18b, 20) adjacent to the outer wall of the associated magnetic box (12) without clearance.