DE102013206596A1 - Heavy Duty Prop - Google Patents

Abstract

The invention relates to a heavy-duty prop. The heavy-duty support has a resilient support support (18), the load of which can be derived from a support element (22) via a counter element (20). The counter element (20) is preferably designed in the form of a nut which engages in an external thread (24) of the support bracket (18). Such counter elements (20) can hardly be released under load. The invention therefore provides for a lower part (16) of the heavy-duty support to be designed in such a way that a hydraulic cylinder (36) can be arranged in or on the support foot (22). A piston (40) of a hydraulic cylinder (36) arranged and actuated in or on the support foot (22) can then press on the support support (18) and thereby relieve the counter element (20). As a result, the counter element (20) can be actuated or moved relative to the support foot (22).

Description

The invention relates to a lower part of a heavy-duty support, with a column foot and a load carrier which can be loaded with a load, wherein the support bracket is supported directly or indirectly on the column foot.

The invention further relates to a heavy-duty prop with a lower part according to the invention.

Wherever open spaces must be bridged in construction, such as in bridge construction, it is necessary to support the components and / or formwork from below. Usually this is done with supports, which are preset to the desired height and then hold the component and / or the formwork to stable completion.

For larger structures so-called heavy-duty props are used, each of which can carry a weight of several 100 kN load. Depending on the size of the structure a variety of these supports is used.

Even when renovating heavy duty columns can be used, for example, when a ceiling pillar must be replaced in an underground car park. The heavy duty support must be controlled with a precisely predetermined force support the ceiling during the exchange.

After completion of the construction, the formwork and columns must be removed again. For this purpose, a lowering of the supporting structure is required.

Various devices are known for this purpose. Many of these devices require a lot of power and time to lower.

One solution that overcomes these problems is in the DE 195 03 299 A1 shown and described. In this case, a spindle nut is set in motion via a drive. About a corresponding translation between the drive and spindle nut, the force required for lowering can be significantly reduced, so that such a device can be driven by a commercial drill on the drive. The variety of such devices required in a larger structure, such as a bridge, provides a tremendous amount of work for the workers involved in construction and / or dismantling.

However, the known device is heavy in weight, complex and relatively expensive to manufacture. In the large number of devices that are needed on a larger site, the weight in handling affects and the construction and dismantling of a formwork system can be more expensive.

Furthermore, from the DE 10 2011 083 279 A1 a lowering pot for a heavy-load support of a supporting structure has become known, in which a lowering of a heavy-load support takes place in that a container with bulk material, via which the load is transferred to the ground, is emptied. Although the lowering pot described allows the lowering under very high load (up to 400 kN), but the immersion pot is constructed relatively complex.

Finally, a simple structure of a lower part of a heavy-duty support has become known, which has a column base, which rests on the ground and has a load carrier can be acted upon with a support. The column foot has a ceiling plate with a through-hole, through which the support bracket is partially guided. The support bracket has an external thread, which engages in an internal thread of a counter element, wherein the counter element is supported on the ceiling plate of the column foot. The counter element is formed substantially in the form of a nut.

To lower the known heavy-duty support, the counter element must be rotated relative to the support bracket. After loading the support bracket with a high load, however, the counter element sits so firmly on the ceiling plate that a release of the counter element is only possible by a wrench with a long lever under very great effort. Often, a striking tool, such as a hammer, must be used to release the counter element, with the risk of damaging individual components of the lower part. Furthermore, when using a hammer, noise may occur, especially in residential areas.

The invention is therefore based on the object to provide a heavy-duty prop that is both structurally simple and easy to lower.

This object is achieved by a lower part of a heavy duty support with a column base and a load carrier can be acted upon with a load, wherein the support bracket is supported via a counter element on the column foot and a hydraulic cylinder for raising the support bracket in or on the column foot can be arranged.

A hydraulic cylinder is understood to be a cylinder whose piston is pressurized by a fluid, in particular oil, and / or extendable.

The counter element can be, for example, a bolt which is inserted into a recess of the support carrier. Alternatively, the counter-element may be clamping jaws or the like, by means of which a connection of the column foot to the support carrier can be produced.

The column foot can be placed on the ground. The load - for example, the weight of a formwork - can be removed via the support beam and the counter element on the column foot and finally the substrate. The support bracket is supported in the static state via a counter element on the column base. The counter element makes a detachable in the unloaded state of the heavy-load support connection between the column base and the support bracket forth.

The lower part of the heavy duty support is constructively simple designed by the described training. As a result, a cost-effective production of heavy-duty prop is achieved. Furthermore, the lower part can be made particularly easy, so it is easy to transport.

If the heavy-duty support is now to be lowered, a hydraulic cylinder can be arranged in or on the column foot in such a way that the support bracket is raised when the piston of the hydraulic cylinder is extended. The support bracket is acted upon in this case by the hydraulic cylinder with such a high force that the counter element can be easily solved. The support bracket is thus not raised to lower the heavy duty prop, but relieved by the hydraulic cylinder. For example, a 200 kN loaded heavy-duty support can absorb a force of 140 kN via the hydraulic cylinder, so that the support bracket is only supported by the counter element with 60 kN on the column foot. By relieving the counter element can be easily solved.

The hydraulic cylinder can remain permanently in or on the column foot. In a particularly preferred embodiment of the invention, however, the hydraulic cylinder, in particular without tools, can be arranged as needed in or on the column foot. As a result, a separate hydraulic cylinder does not have to be provided for all heavy-duty supports, as a result of which the lower part of the heavy-duty support can be made very cost-effective.

Optimum power transmission of the hydraulic cylinder to the support bracket can be achieved when the hydraulic cylinder is insertable into the column foot.

The support carrier is preferably in the form of a threaded rod, in particular in the form of a longitudinally at least partially hollow threaded rod, wherein an external thread of the threaded rod engages in an internal thread of the counter element. Such a support carrier is also referred to as Absenkspindel. The counter element is formed in a preferred embodiment substantially in the form of a nut.

The support bracket can be made particularly simple if the external thread is applied to a tube which is closed at the end with a cap which can be pressurized by the hydraulic cylinder and thus actuated.

Furthermore, the column foot can have a cover plate with a passage recess, through which the support bracket is partially guided, wherein the counter element is supported on the ceiling plate. As a result, the lower part as a whole can be formed particularly stable and secure.

The hydraulic cylinder can be supported at one end on the support beam and the other end on the ground. In a preferred embodiment of the invention, however, the column foot on a bottom plate on which the hydraulic cylinder is supported. The hydraulic cylinder is placed on the bottom plate for this purpose.

In order to be able to estimate the remaining "travel path" of the support carrier relative to the column foot, a position indicator can be provided on the lower part, on which the position of the support carrier relative to the column foot can be read.

To form the position indicator, a plurality of recesses, in particular passage recesses, may be provided in the column foot relative to which the position of the support bracket can be read. For this purpose, a user can determine by a view from the side on the lower part, which recess coincides with an end or a mark of the support carrier.

In a particularly preferred embodiment of the invention, a securing device is provided on the lower part, which limits a movement of the counter element in the longitudinal direction of the support carrier. When using the securing device, the support carrier can thus not be moved the entire stroke of the hydraulic cylinder, but the support carrier can only be moved within a margin, a certain travel, which allows the securing device.

As a result, loads can be controlled gradually raised or lowered by the hydraulic cylinder. This is particularly advantageous for the parallel use of multiple heavy-duty supports, as by the use of Securing devices can be ensured that a further raising or lowering takes place only when all heavy duty props were raised or lowered by the margin of their security devices.

The securing device can be designed in the form of a stop which limits the movement of the counter element upwards, that is to say away from the column foot. In this case, the movement of the counter element is bounded at the top by the securing device and at the bottom by the column foot.

The movement of the support carrier relative to the column foot can be controlled in stages. For example, a retracted support beam can be extended in a controlled stepwise manner. The support carrier is moved in a first step by the hydraulic cylinder away from the column foot so long, d. H. extended until the counter element abuts the securing device. Subsequently, in a second step, the counter element is moved in the direction of the column foot until the counter element bears against the column foot. Now, the support carrier can be moved again, as in the first step, by the hydraulic cylinder, etc. Accordingly, an extended support carrier can be retracted controlled stepwise.

To form the securing device, the counter element preferably has on its outer side a groove extending perpendicularly to the longitudinal axis of the internal thread, in particular a groove running around the counter element, wherein a projection arranged on the column foot, in particular in the form of a hook, is provided and the groove is parallel is formed wider to the longitudinal direction of the internal thread, as a engaging in the groove projection tip. As a result, the "travel path" predetermined by the securing device can be specified exactly by the width of the groove. The predetermined by the securing device "travel" is preferably about 10 mm to 20 mm.

The invention further relates to a previously described lower part with a hydraulic cylinder arranged in or on the lower part.

The hydraulic cylinder may be connected to a hydraulic power unit. Preferably, the hydraulic cylinder is connected to a hand pump, since a hydraulic unit, which has a hydraulic cylinder and a hand pump, is easy to transport by hand. If required, the hydraulic unit can therefore be used flexibly on different heavy duty supports.

A pressure gauge is preferably connected to the hydraulic cylinder. The pressure gauge may be provided with a scale which directly indicates the force acting on the cylinder. The manometer thus allows a force-controlled movement of the support bracket. In this way, the force can be determined at a known load in a simple manner, with which the counter element rests on the column foot. Furthermore, a building, in particular a ceiling, be supported with a controlled predetermined force.

Finally, the invention relates to a heavy load support with a lower part described above.

Further features and advantages of the invention will become apparent from the following detailed description of an embodiment of the invention, with reference to the figures of the drawing, which shows essential to the invention and from the claims.

The features illustrated in the drawing are not necessarily to scale and illustrated in such a way that the features of the invention can be made clearly visible. The various features may be implemented individually for themselves or for a plurality of combinations in variants of the invention.

In the schematic drawing, an embodiment of a heavy-duty support according to the invention is shown and explained in more detail in the following description.

Show it:

1 a perspective view of a heavy duty prop;

2 a longitudinal section of a lower part of the heavy duty prop 1 ; and

3 another, in contrast to 2 90 ° rotated longitudinal section of the lower part of the heavy-duty prop.

1 shows a perspective view of a heavy-duty support according to the invention 10 , The heavy duty prop 10 has a headboard 12 , a middle section 14 and a lower part 16 on. The heavy duty prop 10 can be used for example for supporting a slab formwork (not shown), wherein the head part 12 on the slab formwork and the lower part 16 gets up on the ground (not shown). The load of the slab formwork can thus over the illustrated heavy-duty support 10 be removed to the ground.

In 1 is the heavy duty prop 10 shown in a static state. The load is thereby from the head part 12 on the middle part 14 transfer. From there it will have an adapter 17 and a support beam 18 continue over a counter element 20 on a column foot 22 of the lower part 16 transfer.

In the column foot 22 the heavy duty prop 10 according to 1 is a hydraulic cylinder used. This is in the 2 and 3 shown.

2 shows a longitudinal section through the lower part 16 , The support bearer 18 has an external thread 24 on that in an internal thread 26 of the counter element 20 intervenes. The counter element 20 in turn relies on a ceiling plate 28 of the column foot 22 from. The ceiling plate 28 has a through-hole 29 on, through which the support beam 18 partially guided. The ceiling plate 28 is about four vertical fasteners, of which in 2 a first connecting element 30 and a second connecting element 32 is visible, with a bottom plate 34 of the column foot 22 connected.

On the support beam 18 the adapter sits 17 by exchanging an adaptation to different middle parts 14 (see. 1 ), z. B. einstielig, tripartite or - as in 1 shown - four-legged allowed.

The counter element 20 is designed essentially in the form of a mother. An up or down movement of the head part 12 (see. 1 ) thus takes place in that the counter element 20 counterclockwise or clockwise about the longitudinal axis of the lower part 16 is turned.

Such a rotation is at a high load of the support carrier, 18 - if at all - very difficult. A rotation of the counter element 20 is typically only up to a load of the support bracket 18 of maximum 60 kN possible. Even at higher loads of heavy-duty prop 10 a rotation of the counter element 20 to enable is the buttress foot 22 for receiving a hydraulic cylinder 36 educated.

The hydraulic cylinder 36 has a cylinder body 38 , a piston 40 (in 2 only schematically shown) and a connection 42 for acting on the hydraulic cylinder with a fluid, in particular with hydraulic oil on. The hydraulic cylinder is supported at one end on the bottom plate 34 and at the other end at a cap 44 of the support carrier 18 from.

The hydraulic cylinder 36 is for raising the support bracket 18 in the column foot 22 arranged. Will the connection 42 pressurized, the piston pushes 40 on the support beam 18 , The counter element 20 is relieved and can be turned.

To the positioning of the hydraulic cylinder 36 when inserting the hydraulic cylinder 36 in the column foot 22 To facilitate, assigns the column foot 22 a hydraulic cylinder stop 46 (Housing) on. The hydraulic cylinder stop 46 is in the vertical direction semi-cylindrical (see also 1 ).

The hydraulic cylinder stop 46 has a plurality of equidistantly formed in the vertical direction recesses in the form of through holes, of which for reasons of clarity in 2 only a first recess 48 is provided with a reference numeral. The recesses allow a user (not shown) to look from the side to the column foot 22 Determine at which position the support beam 18 in the column foot 22 located. For this purpose, he observes through which recesses the support beam 18 and the cap 44 , is visible.

Is the support bearer 18 visible through many recesses, is the support beam 18 lowered far; is the support bearer 18 visible only through a few recesses, is the support beam 18 from the column foot 22 extended.

The recesses of the hydraulic cylinder stop 46 thus provide a position indicator of the support bracket 18 in the column foot 22 The readability of the position indicator can be improved when on the support bracket 18 a marker (not shown) is attached. This can for example be done by the cap 44 is highlighted in color.

3 shows the lower part 16 in one respect 2 90 ° rotated longitudinal section. The lower part 16 has a securing device 50 on. The safety device 50 includes a projection 52 which is essentially hook-shaped and formed on the column foot 22 can be arranged. The lead 52 sticks out with its tab tip 54 in a circumferential groove 56 of the counter element 20 ,

The width of the groove 56 is labeled B. Through the security device 50 can the counter element 20 in the longitudinal direction of the support carrier 18 only move within path B. This can be a way controlled lowering and lifting the support bracket 18 respectively.

To lower the support bracket 18 from the in 3 shown position, the counter element 20 be screwed upwards until a lower groove flank of the groove 56 at the head of the projection 54 is applied. Then the post carriers 18 by retracting the piston 40 of the hydraulic cylinder 36 pressure controlled to be moved down.

Thereafter, the counter element 20 be screwed back up until the lower groove flank of the groove 56 again at the tip of the projection 54 attached etc.

The controlled path lowering offers particular advantages in simultaneous lowering of several heavy load carriers (not shown), as this stresses on elements, especially formwork elements that are attached to the heavy load carriers or rest, can be avoided.

In summary, the invention relates to a heavy-duty prop. The heavy-duty support has a load-bearing support carrier whose load can be discharged via a counter element to a support foot. The counter element is preferably designed in the form of a nut, which engages in an external thread of the support carrier.

Under load such counter elements are hardly solvable. The invention therefore provides to form a lower part of the heavy-duty support such that a hydraulic cylinder can be arranged in or on the column foot. A piston of a hydraulic cylinder arranged and operated in or on the column foot can then press and relieve the support carrier. As a result, the counter element can be actuated or moved relative to the column foot.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19503299 A1 [0008]
• DE 102011083279 A1 [0010]

Claims (12)

Lower part ( 16 ) of a heavy-duty prop ( 10 ) with a column foot ( 22 ) and a load carrier can be acted upon with a load ( 18 ), whereby the support carrier ( 18 ) via a counter element ( 20 ) on the column foot ( 22 ), characterized in that a hydraulic cylinder ( 36 ) for raising the support beam ( 18 ) in or at the column foot ( 22 ) can be arranged. Lower part according to claim 1, characterized in that the hydraulic cylinder ( 36 ) in the column foot ( 22 ) can be used. Lower part according to claim 1 or 2, characterized in that the support carrier ( 18 ) in the form of a threaded rod, in particular in the form of a longitudinally at least partially hollow threaded rod, wherein an external thread ( 24 ) of the threaded rod in an internal thread ( 26 ) of the counter element ( 20 ) intervenes. Lower part according to claim 3, characterized in that the column foot ( 22 ) a ceiling plate ( 28 ) with a passage recess ( 29 ), wherein the support carrier ( 18 ) partially through the passage recess ( 29 ) is guided, and the counter element ( 20 ) on the ceiling plate ( 28 ) is supported. Lower part according to one of the preceding claims, characterized in that the column foot ( 22 ) a bottom plate ( 34 ), to which the hydraulic cylinder ( 36 ) can be placed. Lower part according to one of the preceding claims, characterized in that on the lower part ( 16 ) a position indicator is provided at which the position of the support carrier ( 18 ) relative to the column foot ( 22 ) is readable. Lower part according to claim 6, characterized in that for forming the position indicator a plurality of recesses ( 48 ), in particular through-holes, in the column foot ( 22 ) are provided, relative to which the position of the support carrier ( 18 ). Lower part according to one of the preceding claims, characterized in that on the lower part ( 16 ) a security device ( 50 ) is provided which a movement of the counter element ( 20 ) in the longitudinal direction of the support carrier ( 18 ) limited. Lower part according to claim 8 in conjunction with claim 3, characterized in that for the formation of the securing device ( 50 ) the counter element ( 20 ) on its outside a perpendicular to the longitudinal axis of the internal thread ( 26 ) running groove ( 56 ), in particular one around the counter element ( 20 ) circumferential groove ( 56 ), and one at the column foot ( 22 ) arranged projection ( 52 ), in particular in the form of a hook, wherein the groove ( 56 ) parallel to the longitudinal direction of the internal thread ( 26 ) is wider than one in the groove ( 56 ) engaging projection tip ( 54 ). Lower part according to one of the preceding claims and one in or on the lower part ( 16 ) arranged hydraulic cylinder ( 36 ). Lower part according to claim 10, characterized in that on the hydraulic cylinder ( 36 ) a pressure gauge is connected. Heavy load support ( 10 ) with a lower part ( 16 ) according to one of claims 1 to 11.

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