WO2019025394A1

WO2019025394A1 - Formwork support, formwork-supporting device and method for removing a formwork arrangement

Info

Publication number: WO2019025394A1
Application number: PCT/EP2018/070652
Authority: WO
Inventors: Gerald BURGSTALLER; Thomas GREUL
Original assignee: Doka Gmbh
Priority date: 2017-07-31
Filing date: 2018-07-31
Publication date: 2019-02-07
Also published as: EP3662119A1; EP3662119B1; EP3438376A1; EP4026962B1; EP4026962A1

Abstract

The invention relates to a formwork support (2) having - an upper support part (10), - a lower support part (11) and - a lowering device (16) for lowering the upper support part (10) from a supporting position for supporting a formwork structure (3) into a removal position for dismantling the formwork structure (3), wherein - the lowering device (16) has a braking unit (17) which is designed for braking the lowering of the upper support part (10) between the supporting position and the removal position to a substantially constant lowering speed substantially independently of a vertical load acting on the upper support part (10). The invention further relates to a formwork-supporting device and to a method for removing a formwork arrangement.

Description

SHUTTER SUPPORT, SHUTTER SUPPORT AND METHOD FOR

SHUTTERING OF A FORMWORK ASSEMBLY

The invention relates to a formwork support having

an upper support part,

- a lower support part and

a lowering device for lowering the upper support part from a support position for supporting a formwork construction into a stripping position for dismantling the formwork construction.

Furthermore, the invention relates to a formwork support device with at least one such formwork support and with a Scha ^¬ lungsaufbau, which is supported on the formwork support.

Finally, the invention relates to a method for stripping a formwork arrangement.

FR 2823521 describes an assembly of supporting devices, each having a motor and a control device which is adapted on the basis of a sensor signal the Hö ^¬ henunterschied of the support devices to each other by means of a remote control is below a defined threshold to hal ^¬ th. In the support assembly of FR 2 823 521, therefore, only the differences in height of the posts to each other ^{ausgli ¬} chen. The output signal of the track (or the input signal of the control device) is therefore a position signal. According to FR 2 823 521, a post with a speed profile not specified in more detail is lowered, while the other posts follow this position signal and thus have the same velocity profile. Furthermore, a damper is Darge ^¬ represents. The damper acts on a nut which, when lowered, causes a spindle to rotate. The spindle is connected to a geared motor. The gear motor can be used in the lowering as a brake for controlling the lowering movement. However, this also does not show that the upper support part is retracted independent of the load at a constant lowering speed. GB 2,526,883 discloses a support device with a hydraulic devices ^¬ rule lifting and lowering device. Through the outlet valve, the support device can be lowered. However, not he imagines ^¬ that the lowering speed would be constant and independent of a vertical load. It is merely described that the outlet valve allows a slow escape of the fluid ^¬ light.

The FR 3 028 281 also describes a hydraulic support ^¬ device, the lowering is controlled by a valve. However, only the position Gere ^¬ gel is the flow.

WO 2011/131977 AI shows a support device with a motor mountable on a screw. With this motor, the screw does not have to be turned manually. However, WO 2011/131977 AI contains no further details on the manner of controlling the engine.

From FR 2 815 064 a generic support device for supporting a formwork is known. The support device has a shaft and a slide, which together form a teleco ^¬ scopeinheit. Furthermore, a damping device for damping the downward movement of the slider is provided. The damping device has a vertical hydraulic drive with a cylinder chamber and a piston displaceable therein, the piston engages the slider. The cylinder chamber communicates via a valve arrangement with a compensation chamber. On the one hand, a slow downward movement should be achieved. On the other hand, the slider should be able to be raised manually with little resistance.

In practice, however, has proven to be disadvantageous that the support device of FR 2 815 064 in many applications is insufficient. When the formwork was supported by a plurality of such support devices, there could be a problem that the formwork would fall more rapidly in some places. This can be dangerous for the operators present and lead to damage to parts of the formwork arrangement. In addition, the Ausschalvorgang can be hindered. Accordingly, the object of the present invention is to alleviate or eliminate at least individual disadvantages of the prior art.

This object is achieved by a formwork support having the features of claim 1 and by a formwork support apparatus having the features of claim 12 and a method having the features of claim 14.

According to the invention the lowering means to a brake unit, which is arranged for braking the lowering of the upper column part to a substantially constant lowering speed in the We ^¬ sentlichen independently of a force acting on the upper support part vertical load between the supporting position and the Ausschalstellung.

Accordingly, the brake unit according to the invention can ensure that the lowering movement takes place from the upper support position to the lower Ausschalstellung at different vertical loads with substantially the same lowering speed. The support ^¬ position is set up for the support of the formwork arrangement and the concrete in a concreting. In contrast, the Ausschalstellung to allow the dismantling or dismantling of formwork elements of the formwork arrangement. The substantially constant lowering of the upper support alarm ^¬ zenteils is preferably between 0.5 and 50, especially between 1 and 20 millimeters per second. For the purposes of this disclosure, the mentioned independence of Absenkge ^¬ speed of the vertical loads means that the lowering speed at least at load or vertical loads (in addition to the weight of the upper support member) at least from 200 Newton to 30,000 Newton, especially from 100 Newton to 50,000 Newton is essentially constant. This embodiment is particularly advantageous when the formwork arrangement is supported by a plurality of formwork supports according to the invention. Due to the braking unit, different vertical loads on the shuttering supports do not affect the lowering speed, so that the individual shuttering supports can be lowered uniformly in the direction of the shuttering position. For the purposes of this disclosure, the location and direction information, such as "top", "bottom", "upper", "lower", etc., refer to the intended use state of the shuttering ^¬ support, in which the formwork support in a substantially vertical position is arranged.

In order to prevent accidental lowering of the formwork support during concreting or to lower the formwork support after concreting, it is advantageous if a securing element with a securing position to secure the upper support member in the support position and a release position to release the lowering of the upper support member is provided.

The securing member may, in particular a plug-in part, wherein ^¬ play, have a socket pin or a plug-in bracket, which is inserted into the locking position in a position spaced from a plurality of vertically holding holes of the upper post portion such that is locked, the lowering of the upper support part relative to the lower support part , By pulling out the plug-in part from the holding opening of the upper support part, the release position is reached, from which the upper support part can be lowered relative to the lower support part.

According to a particularly preferred embodiment, the lowering means is adapted to lower the upper support part by Anord ^¬ voltage of the securing element in the release position and independently at a substantially constant lowering speed from the supporting position to the Ausschalstellung. This means that the transfer of the security element is in the release Stel ^¬ development the lowering of the upper support part not only free but also triggers ^¬. In use, it is therefore only necessary to bring the securing element in the release position to initiate the lowering of the upper support member from the support to the Ausschalstellung. Thus a particularly simple operation of the formwork support made possible without compromising Si ^¬ safety.

According to a first preferred embodiment, the brake unit a preferably hydraulic linear damper, in particular a cylinder-piston damper on. This linear damper is adapted to accomplish the lowering of the upper support member from the support to the Ausschalstellung at different vertical loads at substantially the same lowering speed. The linear damper comprises a damping medium, for example an ionized liquid, an oil, a gas, a solid, for example a granulate, or a medium whose state of aggregation changes during operation.

The load-independent reduction of the formwork support to ermögli ^¬ Chen, preferably, the linear hydraulic damper in a favorable embodiment of a flow control valve, in particular with a pressure compensator on. In a preferred embodiment, the flow of the damping medium by means of the pressure compensator, also referred to as Dif ^¬ reference pressure regulator, regulated so that a pressure and thus a load compensation can take place. The flow control valve preferably has a throttle with a line cross-section, wherein the pressure detected before and after the throttle changes the flow by means of the pressure compensator in such a way that it remains constant. For this purpose, the pressure compensator preferably has a pressure compensator spring. The flow control valve can be designed, for example, as an oil flow control valve with pressure compensation. Linear dampers as such are known per se in the prior art, so that further explanations on this can be dispensed with.

According to an alternative preferred embodiment, the Absenkeinheit a spindle with an external thread and a Lagerele ^¬ ment with an internal thread, wherein the bearing element engages with the internal thread in the external thread of the spindle.

When lowering the upper support member, a relative rotational movement between the spindle and the bearing element in such a way he testifies ^¬ that the upper support member is lowered at substantially constant lowering speed of the upper position (support position) in the lower position (Ausschalstellung).

With regard to a structurally simple, stable design, the spindle can be rotatably mounted on the lower or upper support part, wherein the bearing element rotatably with the upper or lower Ren support part is connected. Preferably, the spindle is rotatably mounted on the lower support member, wherein the bearing member is rotatably connected to the upper support member. However, it can also be rotatably supported on the upper support part, the spindle, wherein the bearing element is then rotatably ver ^¬ connected with the lower support member.

Depending on the dimension of the formwork support, the spindle before Trains t ^¬ a length of 20 to 2000 mm, in particular from 300 to 800 mm, to permit a lowering of the supporting position during concreting in the Ausschalstellung after concreting.

The bearing element can be executed as a nut with an internal thread ^¬ leads, in which engages the external thread of the spindle. In this embodiment, the spindle is rotated during the lowering of the upper support member by the threaded engagement with the bearing element in rotation and simultaneously held or guided. Here, the mother takes predominantly occurring in the course of re ^¬ lativbewegung the bearing element to the spindle radial ^¬ forces. The bearing element can also be designed such that both radial and axial forces can be absorbed.

A particularly stable bearing can be achieved if the lower support part has on a support foot at least one rolling or a pivot bearing, in particular a ball bearing, for the spindle. Of course, a plain bearing can be used.

With regard to a partially saving and stable design, the bearing element is fixed by a positive, non-positive or cohesive connection to the upper support part. This is special ^¬ ficial when the bearing element is fixed by a crimp on the upper support part.

Depending on the embodiment, the mounting of the spindle on the bearing element can already be arranged on the resulting frictional forces during threaded engagement so that an inde ^¬ pendent from the load lowering speed is established which is suitable for a soft From ^¬ lowering of the supporting in the Ausschalstellung. This can be realized by appropriate design of the external thread of the spindle and the internal thread of the bearing element such ^¬ lisiert that the rotational speed or the rotational speed of the spindle is set in the bearing element to a substantially constant, load-independent lowering speed.

In a preferred embodiment, the brake unit has a brake for decelerating the relative movement between the spindle and the bearing element or for achieving a substantially constant relative rotational movement of the spindle in the bearing element. In this embodiment, an additional (ie the outer thread of the spindle and the internal thread of the bearing element verschie ^¬ dene) brake is provided which can increase the braking force in proportion to increasing the speed of the spindle to brake the relative movement between the spindle and the bearing element and so to keep the relative rotational movement of the spindle in the bearing element substantially constant.

Such brakes are known in the art in various designs, such as electric, hydraulic, magnetic ^¬ cal, electromagnetic or mechanical brakes, such as centrifugal brakes, rotary brakes, eddy current brakes or the like.

According to a particularly preferred embodiment, the brake in the lower part of the support, preferably at the lower Endbe ^¬ rich, arranged.

According to a further preferred embodiment, the brake is arranged on the bearing element. In this embodiment, the brake may for example have a ball drive, a clamp or a jaw.

To achieve a compact formwork support with high safety standard for the operating forces, the lowering means is be ^¬ vorzugt inside the upper and lower support part angeord ^¬ net. Thus, in this embodiment, the lowering device is completely hidden inside the upper and / or lower support part. If the upper support member is designed as an inner tube, which is inserted into the formed as an outer tube lower support member, a stable, telescopic shuttering support can be achieved.

In the formwork support device mentioned above, a plurality of formwork supports are provided, which are arranged in a substantially vertical position at a horizontal distance from each other. Due to this arrangement, in use, different vertical loads can act on the individual formwork posts. For example, in each case at least one formwork ^¬ support in an edge area of the formwork structure and at least one formwork support may be provided in a central region of the formwork assembly. In use, the formwork support in the central area must absorb higher vertical loads than the formwork support in the edge area. Due to the braking unit, however, the formwork support is lowered in the central region with substantially the same lowering speed as the formwork support in Randbe ^¬ rich from the support to the Ausschalstellung.

The initially mentioned method for stripping a Formwork ^¬ arrangement comprises at least the following steps:

- Supporting the formwork arrangement on several formwork supports;

- Simultaneous lowering of upper support parts of the formwork supports at substantially the same, constant lowering speed.

As previously mentioned, the formwork posts are subjected to many different vertical loads during lowering, with the

Brake unit ensures that the shuttering supports are independent of the respective acting vertical load with the same Absenkge ^¬ speed.

The invention will be further described below with reference to embodiments shown in the drawings.

Fig. 1A shows a formwork support device with a plurality of formwork supports according to the invention in a support position, in which a brake unit ensures that the lowering of the shown support position in a Ausschalstellung can be independent of load.

Fig. 1B shows the formwork support device of FIG. 1, wherein the formwork supports are shown in a lowered Ausschalstellung.

2A, 2B, 2C each show a formwork support ^{according to the} invention, which is arranged in the representation of FIG. 2A in the support position, FIG. 2B in an intermediate position and FIG. 2C in the Ausschalstellung.

FIG. 3 shows a further view of the formwork support according to FIG. 2A.

FIG. 4 shows a detail view of the details highlighted in FIG. 3.

Fig. 5 shows a perspective view of the formwork support ge ^¬ Mäss Fig. 3, 4.

6A, 6B, 6C each show a further embodiment variant of the formwork support according to the invention, which is arranged in the representation of FIG. 6A in the support position, FIG. 6B in the intermediate position and FIG. 6C in the Ausschalstellung.

FIG. 7 shows a further view of the formwork support according to FIG. 6C.

FIG. 8 shows a detailed view of the details highlighted in FIG. 7.

Fig. 1 shows a formwork support device 1 with a plurality of supported on the ground and in a horizontal distance from each other arranged formwork supports 2, which subordinate a formwork structure 3 subordinate. The formwork construction 3 has ge ^¬ exemplary embodiment shown on the formwork props 2 abge ^¬ assisted longitudinal or primary beams 4, on which the same type, extending transversely to the main beams 4 cross member 5 superimposed. The formwork structure 3 is used for producing a ceiling. directed, with this formwork panels 6 are arranged on the top of the cross member 5 to the abutment against a wall 7 shown schematically. To secure the formwork posts 2 in a vertical position, these are supported by means of tripods 8. The formwork structure 1 is known per se from the prior art, so that more detailed explanations on this can be dispensed with.

When installed, especially during and after the production of the concrete ceiling (not shown), the formwork supports 2 are loaded vertically. The formwork support 2 comprises an upper support part 10 which can be lowered into a lower Assisting ^¬ eil. 11 The upper 10 and the lower support part 11 together (apart from the overlapping area) result in substantially the entire longitudinal extent of the formwork support 2.

Of course, but also more support members between the upper 10 and the lower support member 11 may be provided. The upper support part 10 has in its upper end region on a plate-shaped widening or support plate 12, on which in the embodiment shown per se known holding head, for example in the form of a four-way head (see Fig. 1A, 1B), is placed. On this head of the formwork structure 3 is supported. In Fig. 2ff the head is not shown for the sake of clarity. In the embodiment shown, the upper support member 10 is designed as an inner tube, which is inserted into the formed as an outer tube lower support member 11. This results in a telescopic shuttering support 2.

Furthermore, a securing element 13 is provided, which is connectable with spaced apart in the vertical direction holding openings 14 on the upper support member 10. The securing element 13 can be arranged in a securing position within one of the holding openings 14 in order to block a lowering of the upper support part 10. To release the lowering of the upper support part 10, the securing element is arranged in a release ^¬ position outside of the holding openings 14. In the embodiment shown, the securing element 13 has a Steckbü ^¬ gel (see also Fig. 5), which has an insertion section for insertion into one of the holding openings 14. Furthermore, an adjusting element 15 is provided, which is a fine adjustment 1

r height of the support 2 allows.

In addition, a lowering device 16 is provided for lowering the upper support part 10 from a supporting position (see Fig. 1A) supporting the formwork structure 3 during concreting into a stripping position (see Fig. 1B) enabling removal of the formwork structure 3. In the embodiment shown, the lowering device 16 is arranged completely inside the upper 10 and the lower support part 11, respectively.

The lowering device 16 includes a brake unit 17 such that the lowering of the upper support part 10 to a constant in the We ^¬ sentlichen lowering speed - in the Wesent ^¬ union independent of the upper support part 10 through the formwork structure 3 transmitted vertical load - by the support Stel ^¬ slowed down to the Ausschalstellung. In the arrangement of the fuse element 13 in the release position, the upper support member 10 is lowered without further manipulation by the operator independently in the Ausschalstellung.

In the embodiment variant of FIGS. 2A to 2C, 3, 4 and 5, the brake unit 17 has a hydraulic linear damper 18 with a cylinder 18A and a piston 18B. The piston 18B is slidably supported in the cylinder 18A. In the embodiment shown, a piston rod of the piston 18 B is attached to a Halteele ^¬ ment 19, here a run through an eyelet on the piston rod dowel pin, which is held in bores of the upper Stüt ^¬ zenteils 10. Accordingly, the cylinder 18A at a further holding member 20, a simple, guided by Boh ^¬ stanchions in the lower support part 11, and secured with nuts from the outside bolt fastened here. Of course, however, the cylinder on the upper support member 10 and the piston 18 B may be attached to the lower support member 11.

As can be seen from Fig. 4, the linear damper 18 a

Flow control valve 21 with a pressure compensator 29, whereby the load ^¬ independent lowering speed of the piston 18 A (and thus the upper support member 10) relative to the cylinder 18 B (and thus against the lower support member 11) is ensured. In FIGS. 6A to 6C, Fig. 7 and Fig. 8 shows an alternative embodiment is shown in which the brake unit 17 ei ^¬ ne spindle 22 with an external thread 23 and a bearing member 24 having an internal thread, the bearing element 24, here a nut, engages with the internal thread in the external thread 23 of the spindle 22. In the embodiment shown, the spindle 22 is rotatably mounted on the lower support member 11. For this purpose, the lower support member 11 on a support leg 25 for ^{¬ at} least one (only schematically shown) pivot bearing 26, in ^¬ example, a ball bearing, for the spindle 22. Furthermore, a brake 27, here in the form of a centrifugal brake, for influencing the rotational movement of the spindle 22 is schematically shown. The bearing element 24 is rotatably disposed at the lower end of the obe ^¬ ren support member 10. In the embodiment shown, the bearing element 24 is fixed to the upper support part 10 via a crimp connection 28. In addition to the above, the brake 27 forth ^¬ beige led braking effect can in the bearing element 24 (not shown here) ball drive or can (not shown here) clamps or jaws may be provided through which the friction and thus the approximately constant rotational speed of the spindle 22 additionally influenced can be.

Claims

Claims:

1. Shuttering support (2) having

an upper support part (10),

a lower support part (11) and

- a lowering device (16) for lowering the upper support part (10) from a support position for supporting a formwork structure (3) in a Ausschalstellung for dismantling the formwork structure (3),

characterized in that

- The lowering device (16) has a brake unit (17), which for braking the lowering of the upper support part (10) to a substantially constant Absenkgeschwindig ^¬ speed substantially independent of a on the upper support member (10) acting vertical load between the support ^¬ position and the switch-off position is set up.

2. formwork support (2) according to claim 1, characterized in that a securing element (13) is provided with a securing position for securing the upper support member (10) in the support position and with a release position for releasing the lowering of the upper support member (10).

3. formwork support (2) according to claim 2, characterized in that the lowering device (16) is adapted to the upper support member (10) by arranging the securing element (13) in the release position independently and at a substantially constant lowering speed of the support position in from lower the scarf ^¬ position.

4. formwork support (2) according to one of claims 1 to 3, characterized in that the brake unit (17) has a preferably hydraulic linear damper (18), in particular a cylinder (18A) piston (18B) damper comprises.

5. formwork support (2) according to claim 4, characterized in that the preferably hydraulic linear damper (18) has a current ^¬ control valve (21), in particular with a pressure compensator (29) on ^¬ has.

6. Formwork support (2) according to one of claims 1 to 3, characterized in that the lowering device (16) has a spindle (22) with an external thread (23) and a bearing element (24) with an internal thread, wherein the bearing element (24 ) with the internal thread in the external thread (23) of the spindle (22) ^¬ intervenes.

7. Shuttering support (2) according to claim 6, characterized in that the spindle (22) is rotatably mounted on the lower (11) or upper support member (10), wherein the bearing element (24) rotationally fixed to the upper (10) and lower Support part (11) is connected.

8. formwork support (2) according to claim 7, characterized in that the lower support part (11) on a supporting foot (25) at ^¬ least one roller or a rotary bearing (26), in particular a ball ^¬ bearings, (for the spindle 22 ) having.

9. formwork support (2) according to claim 7 or 8, characterized in that the bearing element (24) via a crimp connection (27) is fixed to the upper support member (10).

10. Shuttering support (2) according to one of claims 6 to 9, characterized in that the brake unit (17) has a brake (27) for braking the relative movement between the spindle (22) and the bearing element (24).

11. Formwork support (2) according to claim 10, characterized in that the brake (27) in the lower support part (11), preferably ^¬ at its lower end portion, is arranged.

12. Formwork support (2) according to one of claims 1 to 11, characterized in that the lowering device (16) in the inner ^¬ ren of the upper (10) and lower support member (11) is arranged and / or that the upper support member (10 ) is performed as an inner tube ^¬ , which is inserted into the outer tube designed as a lower support member (11).

13. Formwork support device with at least one formwork support (2) according to one of claims 1 to 12 and with a Scha ^¬ lungsaufbau, which is supported on the formwork support (2).

14. Formwork support device according to claim 13, characterized in that a plurality of formwork supports (2) are provided, which are arranged in a substantially vertical position in a horizontal distance from each other.

15. A method for stripping a formwork arrangement (3), comprising the steps:

- Supporting the formwork arrangement (3) on a plurality of formwork supports (2);

- Simultaneous lowering of upper support parts (10) of the formwork supports (2) with substantially the same, constant lowering speed.