EP2679746A1 - Support for concrete formworks - Google Patents

Abstract

The length adjustable support (2) has a support section (4), whose one end is formed in a portion of the length of the support section. A hollow cross-section is formed, where an externally threaded portion is provided in one of two end regions. Another support section (6) is formed, which has circumferentially extending ribs or grooves. A coupling sleeve (8) is provided with ribs or grooves in an inner side, that extends in the circumferential direction. An adjusting sleeve is provided with an internal thread, in which the externally threaded portion of the former support section is engaged.

Description

1. (a) einen ersten Stützenabschnitt, der mindestens in einem Teil seiner Länge, der ein erstes Ende des ersten Stützenabschnitts enthält, einen hohlen Querschnitt hat und der mindestens in demjenigen seiner zwei Endbereiche, dem das hohle erste Ende angehört, einen Außengewindeabschnitt besitzt;
2. (b) einen zweiten Stützenabschnitt, der mit einem Teil seiner Länge teleskopisch verschiebbar in dem ersten Stützenabschnitt sitzt und der mindestens in einem Teilbereich seiner Länge außenseitige, in Umfangsrichtung verlaufende Rippen und/oder Nuten besitzt, die sich nur über einen Teil der Umfangslänge erstrecken;
3. (c) eine Kopplungsmuffe, die innenseitig mindestens eine, in Umfangsrichtung verlaufende Nut und/oder Rippe besitzt, die sich nur über einen Teil der Umfangslänge erstreckt und bei jeweils passender Drehwinkelstellung der Kopplungsmuffe relativ zu dem zweiten Stützenabschnitt entweder in Eingriff oder außer Eingriff mit genannten Rippen und/oder Nuten des zweiten Stützenabschnitts ist; und
4. (d) eine Verstellmuffe, die ein Innengewinde besitzt, welches mit dem genannten Außengewindeabschnitt des ersten Stützenabschnitts in Eingriff ist, und die mit der Kopplungsmuffe in drehbarem, aber in Längsrichtung der Stütze bidirektional wirksamem, formschlüssigen Eingriff ist.

The invention relates to a length-adjustable support for concreting or for scaffolding, comprising the following features:

1. (A) a first support portion which has a hollow cross-section at least in a part of its length which includes a first end of the first support portion and which has a male threaded portion at least in that of its two end portions to which the hollow first end belongs;
2. (B) a second support portion which sits with a part of its length telescopically displaceable in the first support portion and which has at least in a portion of its length on the outside, circumferentially extending ribs and / or grooves which extend over only a portion of the circumferential length;
3. (C) a coupling sleeve, which has on the inside at least one, circumferentially extending groove and / or rib, which extends over only a portion of the circumferential length and at each appropriate rotational position of the coupling sleeve relative to the second support portion either engaged or disengaged with said Ribs and / or grooves of the second support portion is; and
4. (D) an adjustment sleeve having an internal thread, which is in engagement with said external thread portion of the first support portion, and which is with the coupling sleeve in a rotatable, but in the longitudinal direction of the support bidirectionally effective, positive engagement.

Length adjustable supports for concreting formwork are known in many types and on the market. In one of the designs, the support has a first pillar portion having a hollow cross-section at least in part of its length, and a second pillar portion telescopically slidably seated in the first pillar portion with a portion of its length. At the hollow end portion of the first pillar portion, a nut is attached so that it can be rotated but does not make relative movement relative to the first pillar portion. The nut possesses on an axial Part of its length an internal thread which is in engagement with an external thread on the second support portion. As a result of rotation of the nut, the second support section can thus be moved further into the first support section or continue out of the first support section.

In particular, in the storage of the known support, the transport of the known support, and the handling of the known support at the beginning of building a concreting formwork you like the support in virtually completely zusammengefahrenem, "short" state. In use, the support is then required in most cases in strongly extended state. Extending the second leg section over a considerable length requires the operator to manually rotate the described nut for many rotations. This takes time and is a pesky activity. If, in order to achieve an improvement here, the threaded engagement between the second support section and the mother executes with a relatively large pitch, you can not extend the support beautiful sensitive to the respective desired overall length.

The invention has for its object to provide a length-adjustable support for concreting or for scaffolding in construction, which can be extended in a convenient manner to the particular desired length of use and thereby allows a precise fine extension and fine retraction.

With the support according to the invention, coarse changes in the overall column length can be accomplished very easily by means of rotation of the coupling sleeve in the disengaged position with ribs and / or grooves of the second column section and subsequent further extraction or further insertion of the second column section into the first column section. After the second support section has been pulled out or pushed in, the coupling sleeve is brought back into engaged position with ribs and / or grooves of the second support section by turning. Regardless of how far the second support section pulled out of the first support section or in the first support section is pushed in, can be carried out by turning the adjustment sensitive fine exiting the second support section from the first support section or Feinhineinfahren the second support section in the first support section. The operation of both the coupling sleeve and the adjusting sleeve can, if desired, be carried out very easily with one hand. But you can also work, especially in the adjustment sleeve, with two hands and / or with a torque arm raising the applied torque.

In the support according to the invention, the first support portion may be profiled at least in the said part of its length on the inner circumference and the second support portion in said part of its length on the outer circumference and corresponding to each other, that the second support portion is held rotationally relative to the first support portion. This makes the handling of the support particularly uncomplicated.

In the support according to the invention, which has the features of one or at least several of the above-mentioned embodiments, the first support portion distributed at least in part of its length around the outer circumference having an alternating sequence of longitudinal grooves and longitudinal elevations. At the transitions at respective longitudinal channel to relevant longitudinal survey in each case a lateral longitudinal gutter undercut can be formed. The second support section may have a plurality of longitudinal elevations distributed over the outer circumference over at least part of its length. It is possible to make the embodiment such that the longitudinal elevations of the second pillar portion respectively project into an inside longitudinal groove of the first pillar portion which are respectively located at those positions where there are longitudinal elevations outside the first pillar portion. This is one of the ways in which the previously described, rotationally fixed holding of the second support section relative to the first support section can be carried out.

In the support according to the invention, which has the features of one or at least one of the above-mentioned embodiments, the externally threaded portion of the first support portion and / or the circumferentially extending ribs and / or grooves of the second support portion may each consist of a plurality of, over Scope distributed sectors be constructed. These sectors can be assigned to the longitudinal elevations on the outer circumference of the first support section and / or the longitudinal elevations on the outer circumference of the second support section. In this way, the production of the externally threaded section on the first support section and / or of the ribs and / or grooves on the second support section, which frequently takes place in a chip-making manner, is simplified.

In the support according to the invention, which has the features of one or more of the above-mentioned embodiments, the at least one, extending in the circumferential direction groove and / or rib of the coupling sleeve can be constructed of a plurality of sectors distributed over the circumference. The number of these sectors may be equal to the number of sectors of the ribs and / or grooves on the outer circumference of the second support portion.

In the support according to the invention, which has the features of one or more of the above-mentioned embodiments, the coupling sleeve and / or Verstellmuffe consist of two halves, which are joined together at a running in the axial direction of the coupling sleeve or Verstellmuffe dividing plane. This split design results in easier manufacturability of these sleeves, be it in particular when produced by cutting production or, in particular, when produced by injection molding or die casting.

In the support according to the invention, which has the features of one or more of the above-mentioned embodiments, the coupling sleeve may have at least one latching element, which cooperatively with a counterpart on the second support portion, the coupling sleeve releasably in a rotational angular position relative latched to the second support portion, in which said engagement with the ribs and / or grooves of the second support portion consists. This facilitates the operation of the coupling sleeve, because the worker senses whether or not the coupling sleeve is in engagement with the ribs and / or grooves of the second support section. In addition, unintentional disengagement with the ribs and / or grooves of the second support portion is more reliably avoided.

In the support according to the invention, which has the features of one or more of the above-mentioned embodiments, said engagement between the coupling sleeve and the Verstellmuffe may be formed by an annular groove / annular rib engagement. This is favorable in terms of production and can be realized in a particularly simple manner, in particular in the case of the above-mentioned split design of coupling sleeve and / or adjusting sleeve.

In the support according to the invention, which has the features of one or more of the above-mentioned embodiments, the internal thread of Verstellmuffe may be locked at the coupling sleeve opposite end against threaded engagement with the male threaded portion of the first support portion. Examples of the realization of the barrier are radially inwardly leaking thread in front of said, opposite end of Verstellmuffe, or small grub screws, which screws into the respective end portion of the internal thread. The locked in the end region female thread leads to the fact that you can not separate the Verstellmuffe towards the second support section from the first support section by unscrewing, not even unintentionally.

In the support according to the invention, which has the features of one or more of the above-mentioned embodiments, either at that end of the first support portion, which is opposite to the Verstellmuffe, a first end component of the support be releasably secured.

In the support according to the invention, which has the features of one or more of the above-mentioned embodiments, at the end of the second support portion, which is opposite to the telescopically received in the first support portion portion of the length of the second support portion, a second end component of the support releasably secured be.

The support according to the invention, which has the features of one or more of the above-mentioned embodiments, in the vast majority, substantially vertical or obliquely from top to bottom applications either with the "first support section below" or with the "second support section below "be used. Even in essentially horizontal applications, in most situations it does not matter which column end you take to the left and which column end you take to the right.

The few paragraphs previously mentioned, attached to the first support portion first component may have a hollow portion with an internal thread, which is in engagement with a further male threaded portion on the first support portion. The few paragraphs previously mentioned, attached to the second support section second end component may have a hollow portion with inside at least one, extending in the circumferential direction groove and / or rib, which extends over only a portion of the circumferential length and at each appropriate rotational position of the head component relative to the second support portion is either in engagement or out of engagement with said ribs and / or grooves of the second support portion. This hollow region can be constructed like the inside of the coupling sleeve. The hollow portion of the head or foot component may also have one or more of the "optional features" disclosed in this application in the context of the coupling sleeve.

In the support according to the invention, which has the features of one or more of the above-mentioned embodiments, the first end component or the second end component may be a top component for co-operation with longitudinal beams of a concrete slab formwork, or a head component for co-operating with formwork slabs of a concrete slab formwork, or head stock for co-operation with side beams and / or formwork panels of a concrete slab formwork, or a head stock for angled connection to a concreting wall formwork. In the latter alternative, the other end component may be a foot component for angled connection to a floor fixing component.

In the support according to the invention, which has the features of one or more of the above-mentioned embodiments, at least one of the components (a) coupling sleeve, (b) Verstellmuffe, (c) foot component, (d) head component may be substantially a plastic component. Suitable plastics with relatively high strength are known in the art. As an example polyamide with or without fiber reinforcement is mentioned. Alternatively, at least one of the constituents mentioned may essentially be a metal constituent.

In the support according to the invention, which has the features of one or more of the above-mentioned embodiments, the first support portion and / or the second support portion may consist essentially of aluminum or aluminum alloy. Alternatively, other metals can be used. A production of plastic is possible, most likely in the case of a support with comparatively low, required compressive strength in the longitudinal direction of the column.

Further objects of the invention are a concrete slab formwork, a concrete wall formwork, a scaffolding in construction, a grandstand, a hall and a trench shed. In all these cases, the said device contains supports according to the invention, which have the features of one or more of the above-mentioned embodiments.

Fig. 1

eine Stütze in perspektivischer Darstellung;

Fig. 2a

einen ersten Stützenabschnitt der Stütze von Fig. 1, im Querschnitt;

Fig. 2b

einen zweiten Stützenabschnitt der Stütze von Fig. 1, im Querschnitt;

Fig. 2c

die Stütze von Fig. 1, im Querschnitt an einer Stelle bzw. in einem Zustand, wo der innere, zweite Stützenabschnitt teleskopisch innerhalb des äußeren, ersten Stützenabschnitts positioniert ist;

Fig. 3

die Stütze von Fig. 1 in perspektivischer Explosionsdarstellung;

Fig. 4

einen Ausschnitt der Fig. 3 in größerem Maßstab;

Fig. 5

die Stütze von Fig. 1, aber mit einem anderen Kopfstück, in perspektivischer Explosionsdarstellung;

Fig. 6

die Stütze von Fig. 5 als Bestandteil einer Betonierungs-Deckenschalung;

Fig. 7

die Stütze von Fig. 1, aber mit anderem Fußbestandteil und anderem Kopfbestandteil, in perspektivischer Explosionsdarstellung;

Fig. 8

die Stütze von Fig. 7 als Bestandteil einer Betonierungs-Wandschalung;

Fig. 9

die Stütze von Fig. 1, aber mit anderem Fußbestandteil und anderem Kopfbestandteil, in perspektivischer Explosionsdarstellung;

Fig. 10

die Stütze von Fig. 9 als Bestandteil einer Betonierungs-Deckenschalung;

Fig. 11 und 12

erfindungsgemäße Stützen, teilweise in zwei unterschiedlichen Ausführungen, als Bestandteile eines Baugerüsts, in Horizontalansicht;

Fig. 13

erfindungsgemäße Stützen als Bestandteile einer vertikal geschnittenen Halle;

Fig. 14

erfindungsgemäße Stützen als Bestandteile einer Tribüne in Horizontalansicht;

Fig. 15

erfindungsgemäße Stützen als Bestandteile eines vertikal geschnittenen Grabenverbaus.

The invention and preferred features of the invention will be explained in more detail in the drawings illustrated embodiments. It shows:

Fig. 1

a support in perspective view;

Fig. 2a

a first pillar portion of the pillar of Fig. 1 , in cross section;

Fig. 2b

a second pillar portion of the pillar of Fig. 1 , in cross section;

Fig. 2c

the prop of Fig. 1 in cross-section at a location where the inner, second support portion is telescopically positioned within the outer, first support portion;

Fig. 3

the prop of Fig. 1 in a perspective exploded view;

Fig. 4

a section of the Fig. 3 on a larger scale;

Fig. 5

the prop of Fig. 1 but with a different head piece, in an exploded perspective view;

Fig. 6

the prop of Fig. 5 as part of a concrete slab formwork;

Fig. 7

the prop of Fig. 1 but with other foot component and other head component, in perspective exploded view;

Fig. 8

the prop of Fig. 7 as part of a concreting wall formwork;

Fig. 9

the prop of Fig. 1 but with other foot component and other head component, in perspective exploded view;

Fig. 10

the prop of Fig. 9 as part of a concrete slab formwork;

FIGS. 11 and 12

inventive supports, partly in two different versions, as components of a scaffolding, in horizontal view;

Fig. 13

inventive columns as components of a vertically cut hall;

Fig. 14

inventive columns as components of a grandstand in horizontal view;

Fig. 15

Supports according to the invention as components of a vertically cut trench construction.

• Einen äußeren, ersten Stützenabschnitt 4,
• einen inneren, zweiten Stützenabschnitt 6,
• eine Kopplungsmuffe 8,
• eine Verstellmuffe 10,
• einen Fußbestandteil 12, und
• einen Kopfbestandteil 14.

In the Fig. 1 illustrated support 2 has the following main components:

• An outer, first support section 4,
• an inner, second support section 6,
• a coupling sleeve 8,
• an adjustment sleeve 10,
• a foot component 12, and
• a head component 14.

In this embodiment, the first pillar portion 4 and the second pillar portion 6 are made of aluminum or an aluminum alloy, and the coupling sleeve 8, the adjusting sleeve 10, the foot component 12 and the head component 14 are made of plastic. All components 4, 6, 8, 10, 12, 14 may alternatively be made of other materials, as set forth above in the general part of the description.

It will now be the cross sections of Fig. 2a, 2b, 2c considered. The first support section 4 is hollow tubular and has four longitudinal elevations 20 distributed over its circumference and thus alternately four longitudinal grooves 22. At each transition from longitudinal elevation 20 to longitudinal channel 22, a lateral longitudinal gutter undercut 24 is formed. At those positions where there are longitudinal elevations 20 on the outside, longitudinal grooves 26, ie local radius enlargements, are present on the inside. The outside longitudinal elevations 20 are bounded radially on the outside each by a circular arc, the outside longitudinal grooves 22 are radially outwardly bounded in each case circular arc, the inside longitudinal grooves 26 are radially outwardly bounded in each case arcuate, between the inside longitudinal grooves 26, the inner circumference of the first support section 4 in each case according to a circular arc limited outside.

In the illustrated embodiment, the outer longitudinal elevations 20, the outer longitudinal grooves 22, the undercuts 24 and the inner longitudinal grooves 26 each extend over the entire length of the first support section 4. However, the execution of the first support section 4 need not necessarily be so. You could z. B. only one in Fig. 1 Forming the upper part of the length of the first support portion 4 in this way.

As in Fig. 2b can be seen, the second support section 6 is also formed hollow tubular. The cross section of the second support section 6 is bounded on the inside by a full circle. On the outer circumference there are circumferentially distributed four longitudinal elevations 30, which are bounded outside circular arc. In each case are arcuate boundaries on the outer circumference of the second support portion. 6

In the illustrated embodiment, the outer longitudinal projections 30 of the second support section 6 extend over its entire length. The formation of the second support section 6 does not necessarily have to be this way.

In Fig. 2c is easy to see how a partial length of the second support section 6 is telescopically received in the interior of a partial length of the first support section 4. The longitudinal elevations 30 of the second support portion 6 fit with some play in the circumferential direction and with a slightly larger clearance in the radial direction in each case in an inner longitudinal groove 26 of the first support portion. There is a small, radial clearance between the unextended outer radius of the second support section 6 and the unrestrained inner radius of the first support section 4. In this way described, the second support section 6 - apart from the mentioned, small game in the circumferential direction - rotatably held in the first support section 4, but can be moved telescopically in the axial direction relative to the first support section 4. The described embodiment further ensures that - apart from the described, small, radial clearance - the second support section 6 is coaxially held and guided in the first support section 4.

In Fig. 3 It can be seen clearly that in each case an external thread section 34 is provided in the first support section 4 both in the upper end region and in the lower end region. Both externally threaded portions 34 are formed the same, so that only the upper one is considered in the following description. The male threaded portion is divided into four sectors distributed over the outer circumference of the first pillar portion 4. These four sectors 36 are each assigned to an outer longitudinal elevation 20 of the first support section 4.

In Fig. 3 is the length of the first support section 4 against the reality (as in Fig. 1 drawn) shortened. The same applies to the second support section 6 to be described below.

In the second support section 6, the longitudinal elevations 30 have been machined so that an axially successive row of grooves 38 has been formed on each longitudinal elevation 30. Two adjacent grooves 38 are separated from each other by a radially outwardly projecting rib 40. The grooves 38 and the ribs 40 extend in the circumferential direction of the second support portion 6 and have no pitch when moving circumferentially along the grooves 38 and ribs 40. However, the training does not necessarily have to be this way, you could z. B. allow a small slope, but would have to provide increased security against unwanted twisting of the coupling sleeve 8 relative to the second support section 6. Whether one speaks of grooves 38 and / or ribs 40 is a matter of the reference surface. If one takes the outer radius of the longitudinal projection 30 as a reference plane, one has only grooves 38 and no ribs 40. If one takes the bottom of the grooves 40 as a reference surface, one has only ribs 40 and no grooves 38th

now the coupling sleeve 8 based on the Fig. 4 be described in more detail. The coupling sleeve 8 is a total - roughly speaking - hollow-tube-like and consists of two practically identical halves 8a and 8b, which are joined to a running in the axial direction of the coupling sleeve 8 dividing plane 42, z. Positioning pins 46 projecting into locating holes 48 in the other coupling sleeve half ensure accurate mutual positioning of the halves 8a and 8b.

The coupling sleeve 8 has - with the exceptions to be described below - a cylindrical inner surface. At four positions, which are distributed circumferentially about this inner circumference 50, there is a respective rib group 52. Each rib group 52 contains - in an axially extending row - three ribs 54 which are axially spaced apart from one another, to be described below. The ribs 54 extend in the circumferential direction and have no slope. The ribs 54, when measured in the axial direction, are so wide that each rib fits into a groove 38 of the second support section 6 with little play. The mentioned distances between the ribs 54 are so large that in each case with a small clearance a rib 40 of the second support section 6 fits. The spacing spaces 56 between the ribs 54 could also be referred to as grooves. Regarding the terms ribs 54, grooves 56 and reference surface for the terms ribs and grooves, the same applies, which has been said above in connection with the grooves 38 and ribs 40 on the second support portion 6.

At one circumferential end, the ribs 54 are sharpened so that they easily slip into three grooves 38 on the second support section 6 upon rotation of the coupling sleeve 8 relative to the second support section 6. At the other circumferential end of the ribs 54 they are as it were connected by an axially extending web 58 with each other. In other words, it could also be said that the clearance spaces / grooves 56 between the ribs 54 do not pass over the entire circumferential length of the ribs, but rather in front of, at the top in FIG Fig. 4 right, end of the ribs 54 stop. The axially continuous ridge that closes the spacing spaces 56 at one end is to limit the rotational movement of the coupling sleeve 8 relative to the second pillar portion 6 counterclockwise when viewed from the top of the coupling sleeve 8 as soon as the ridge 58 abuts against the circumferentially facing end faces of ribs 40 on the second support portion 6.

In the circumferential direction, the ribs 54, including web 58, are so long that the rib group 52 fits with play into a circumferential spacing space 60 between two outer longitudinal elevations 30 (with the grooves 38 and the ribs 40). If all four rib groups 52 are each located in a clearance space 60, the second support section 6 is decoupled with respect to axial relative movement relative to the first support section 4 and can therefore either freely pushed further into the first support section 4 or pulled further out of the first support section 4 become. In contrast, when the coupling sleeve 8 is rotated about 45 ° relative to the second support portion 6, the ribs 54 come into grooves 38 of the second support portion 6. The second support portion 6 is coupled to the coupling sleeve 8 - in terms of axial relative movement.

The four rib groups 52 are uniformly distributed in the circumferential direction over the inner surface 50 of the coupling sleeve 8, so that the four Rib groups 52 are all at the same time either engaged with corresponding grooves 38 and ribs 40 or are out of engagement with the second support portion 6 because they are positioned in the clearance spaces 60.

It is emphasized that the described function of the coupling sleeve 8 can also be achieved if, instead of the rib group 52, only a single rib 54 is present which, with a corresponding rotational position of the coupling sleeve 8, comes into only one groove 38 of the second column section 6. In general, however, it is favorable to provide rib groups 52 with more than one rib 54 in order to provide a plurality of, axially successive ribs 54 in the engaged position of coupling sleeve 8 and second support portion 6 for distribution of applied axial forces on the support. The number of ribs 54 per rib group 52 is determined according to practical design considerations. Numbers other than three ribs 54 per rib group 52 as provided in the illustrated embodiment are possible.

In Fig. 4 it can further be seen that a piece axially upwards from the described rib group 52, a latching element 61 is present. In the illustrated embodiment, the latching element 61 is formed in the manner of a circumferentially extending leaf spring, which at its in Fig. 4 left end carries a radially inwardly projecting catch 62, which - viewed in axial plan view - is chamfered on both sides to the radially inner end. Apart from the catch 62, the latching element 61 has the same radial thickness as the main portion of the coupling sleeve 8. The resilient portion 64 of the latching element 61 goes to its in Fig. 4 right root integrally into the remaining coupling sleeve 8 via. Axially above and axially below the resilient portion 64 is a gap to the remaining material of the coupling sleeve. Also in Fig. 4 in the circumferential direction to the left there is a distance between the catch 62 and the remaining material of the coupling sleeve. In this way, the catch 62 can move resiliently a bit radially outward compared to the drawn situation, until the addressed tip / end of the catch 62 substantially has come to the level of the inner surface 50 of the coupling sleeve 8.

As far as the positioning in the circumferential direction is concerned, the latching element 61 is positioned with its catch 62 in such a way that, when viewed from the disengaged position, viewed axially from above, the coupling sleeve Fig. 4 counterclockwise - rotates into the engaged position, the catch 62 then in the circumferential direction "behind" an outer longitudinal projection 30 of the second support portion 6 resiliently radially inwardly into the in Fig. 4 drawn position moves, so "circumferentially behind" this longitudinal survey 30 snaps. Previously, the tip of the catch 62 on the radially outer side of one of the ribs 40 of the second support portion 6 had slid circumferentially along, which was possible by spring-out radially outward. In addition, the design can be made such that the catch snaps "behind" the other end of the respective rib 40 as soon as the respective rib group 52 is out of engagement with grooves 38 / ribs 40 of the second support section 6.

In an analogous manner, as distributed over the circumference four rib groups 52 are distributed over the circumference four Verrastungselemente 61 are present. But you can also work with a smaller number of Verrastungselementen 61, functionally enough, a single Verrastungselement 61st

The equipment of the coupling sleeve 8 with at least one latching element 61 has several advantages. On the one hand, there is greater certainty that the coupling sleeve 8 is accidentally turned to the disengaged position. On the other hand, the worker feels with a "click-feel" when he has the coupling sleeve 8 correctly turned into the engaged position or in the disengaged position.

The formation of the latching element 61 in the manner of a leaf spring 64 and a catch 62, both z. B. integral with the remaining coupling sleeve 8 and z. B. plastic, is only one of the possibilities for realizing the Verrastungselement 61. One can, for. B. one (eg metallic) Make catch as a separate component and mounted captive together with a suitable spring in an opening in the wall of the coupling sleeve 8.

Next, the adjustment sleeve 10 based on the Fig. 4 described in more detail. The drawn adjusting sleeve 10 consists of two substantially identical halves 10a and 10b, which are joined together on a plane extending in the axial direction of the adjusting sleeve 10 division plane 66. With regard to screws 44, positioning pins 46 and positioning holes 48, the embodiment is analogous to the coupling sleeve 8.

The adjusting sleeve 10 is a total - roughly speaking - hollow-tube-like and is provided on the inner circumference with an internal thread 68. The internal thread 68 could have a thread profile as in conventional screw threads. In contrast, a trapezoidal thread profile, which provides a higher load capacity, is particularly favorable and drawn.

The internal thread 68 is in its in Fig. 4 locked lower end portion against threaded engagement with the respective male threaded portion 34 of the first support portion, z. B. by radially inward leaking internal thread 68 or mounted in the end of the internal thread 68 locks, z. B. by means of grub screws or other locking blocks. As a result, the adjusting sleeve 10 can be mounted only in an axial position on the first support section 4, in which - viewed in Fig. 3 - The lower end portion of Verstellmuffe 10 is still axially below the respective outer threaded portion 34 of the first support portion 4. Then, the adjusting sleeve 10 can be screwed maximum so far up until the lock of the internal thread 68 meets the male threaded portion 34. It is not possible to inadvertently screw the adjusting sleeve 10 so far upwards that it comes out of engagement with the respective externally threaded section 34 of the first support section 4.

At the in Fig. 4 upper end of the adjustment sleeve 10 is provided with a circumferentially extending annular groove 70 on the inner circumference. The coupling sleeve 8 is at its in Fig. 4 lower end with a circumferential direction extending annular rib 72 on the outer circumference. When assembling the first support section 4, adjusting sleeve 10 and coupling sleeve 8, the annular rib 72 is positioned in the annular groove 70, so that an axially bidirectionally effective engagement between the adjusting sleeve 10 and the coupling sleeve 8 is. The two sleeves 8, 10 can be rotated independently but can not move axially relative to one another.

Further one sees in Fig. 4 in that the adjusting sleeve 10 has, distributed over its outer circumference, four vertical ribs on the outside, which in the tangential direction have a rounded-triangular shape. In each vertical rib 74, an eye 76 is present. At the vertical ribs 74, a worker for rotating the adjusting sleeve 10 attack. Rods can be inserted into the eyes 76, if necessary, in order to be able to apply greater torques when turning the adjustment sleeve 70 in this way by means of a lever arm.

The coupling sleeve 8 and / or the adjusting sleeve 10 may be made of fiber-reinforced plastic or non-fiber reinforced plastic, z. B. be produced by injection molding substantially without post. Manufacture from metal, z. B. by die-casting with or without mechanical post-processing is possible. The adjusting sleeve 10 may alternatively be made in one piece, ie without division at the parting plane 66. In this case, one would attach the described end stop of the internal thread 68, as soon as the adjustment sleeve 10 - from above in Fig. 3 - Has been screwed far enough on the relevant external thread 34 of the first support section 4. In addition, it would be practical in this case, instead of the inwardly open annular groove 70 to provide an outwardly open annular groove 70 or an outwardly facing annular rib, in which case the lower end portion of the coupling sleeve would be suitable to redesign.

The coupling sleeve 8 does not necessarily have to be longitudinally split.

In the Fig. 3 drawn prop 2 is at her in Fig. 3 lower end with a first end component, here foot component 12, equipped, which consists in a very analogous manner as the coupling sleeve 8 and the adjusting sleeve 10 longitudinally divided from two halves 12a and 12b. The Fußbestandteil 12 is provided with an internal thread 78, quite analogous to the adjustment sleeve 10, but without locked end. Thus, the foot component 12 by screwing - in Fig. 3 from bottom to top - to the in Fig. 3 lower male threaded portion 34 of the first pillar portion 4 are releasably secured to the first pillar portion 4.

In the Fig. 3 drawn support 2 has at its in Fig. 3 upper end of a second end component, here head component 14, which consists of two halves 14a and 14b longitudinally divided as the coupling sleeve 8, the adjusting sleeve 8 and the foot component 12. Overall, the head component 14 is hollow tubular with a base plate 82 which closes the tube space at one end, with the exception of a central opening, and protrudes outwardly beyond the tube wall in all directions. The base plate 82 thus has an in Fig. 3 upwardly facing contact side which is larger in area than the second support section 6.

On the inner circumference of the head component 18 is formed completely analogous, as described above in detail for the coupling sleeve 8. Thus, the head component 14 can be in disengaged position with grooves 38 / ribs 40 of the second support portion 6 - Fig. 3 in the axial direction down - push on the upper end of the second support section 6. By then turning about 45 °, the rib groups 52 of the head component 14 are brought into engagement with grooves 38 / ribs 40 of the second support portion 6, whereby the head component 14 is detachably fixed axially to the second support portion 6. Locking elements 61 are present, analogous to the coupling sleeve. 8

In Fig. 1 the support 2 is drawn in a state in which the second support section 6 is extended almost completely upwards out of the first support section 4. When not drawn, completely retracted state lies in the Fig. 1 lower end face of the head component 14 against the in Fig. 1 upper end of the coupling sleeve 8 at. The second support section 6 has below a not shown training to protect against complete withdrawal from the first support section 4, z. B. short, radially outwardly projecting bolts in the clearance spaces 60 at the lower ends thereof.

In Fig. 1 No external thread sections 34 of the first support section 4 can be seen because the external thread sections 34 are located inside the adjustment sleeve 10 and the foot component 12.

In Fig. 3 you see that - in Fig. 3 axially below - the upper external thread portion 34, the outer longitudinal extension 20 of the first support portion 4 has been machined away for a section 84 to a smaller radius. This smaller radius corresponds substantially to the bottom of the threads of the externally threaded portion 34. In this way, you can install the adjustment sleeve 10 comfortably in the said section 84 during assembly of the support 2 and then - upwards in Fig. 3 - Screw on the first support section 4.

Axially up in Fig. 3 subsequently to the in Fig. 3 lower male threaded portion 34, there is an analogous, recessed portion 84 of the outer elongated projection 20. This portion 84 is not functionally necessary for the attachment of the foot component 12. However, it is practical, so that the first support section 4 is identical in the upper end region and in the lower end region. Between the worked-away portions 84, the first pillar portion 4 is continuously radially larger throughout its length, as is particularly good in FIG Fig. 1 to see.

At this point it is emphasized that the support according to the invention can optionally be used with the second support section 6 above or below. So you can, starting from Fig. 1 , "turn around" the support 2, so that the second support portion 6 forms the lower part of the support 2. The same applies to "inclined" applications in which the Longitudinal axis of the support 2 forms an angle with the horizontal and the vertical. The same applies to horizontal applications, in which - with the exception of exceptions - it does not matter whether you take the second column section 6 to the left or to the right.

In the present application, the term foot component (12) does not mean that it is located at one end of the first support portion 4; this term is intended to mean only "when using the support 2 at a lower level than the other end of the support 2". The same applies to the term "head component" (14), which is the component which is at a higher level when the support 2 is used. With horizontal use of the support 2, the terms foot component 12 and head component 14 coincide.

In Fig. 5 an alternative embodiment of a head component 14 of the support 2 is drawn. The drawn here head component 14 is again divided longitudinally.

Instead of the base plate 82 of Fig. 3 For example, the head component 14 - forming the pillar end - has a split, plate-like end portion 86, a split, roughly-plate-type support portion 88, and a total of eight vertically extending connecting walls 90 therebetween. Both the end portion 86 and the Auflagerungsbereich 88 are square in plan view from above. The Auflagerungsbereich 88 has along its four square sides lined up a total of eight cup-like recessed compartments 92, which virtually accounts for each square page three compartments 92 and positioned at the corner squares fan 92 each belong to two square sides.

In the compartments 92 optional end portions of - in the state of use usually horizontal - slab formworks 94 or Einhängbereiche of formwork panels 96 can be hung, as in Fig. 6 illustrated by drawings. Further details of this suspension or support of slab formworks 94 or slab formwork panels 96 are not described here because it is not the subject of the present application.

The end portion 86 is in the operating state of the support 2 part of the slab formwork surface 98, as can be seen in Fig. 6 sees.

In the illustrated embodiment, the Fußbestandteil 12 is equipped with rib groups 52 and Verrastungselementen 61 and with the in Fig. 5 detachably connected to the lower end of the second support section 6. In the illustrated embodiment, the head component 14 is provided with internal thread 68 and with the in Fig. 5 bolted to the upper end of the first support section 4.

In the FIGS. 7 and 8 a support 2 according to the invention is shown, which is used as a directional support of a concrete wall formwork 100 or is used.

An alternative, compared to the preceding embodiments, longitudinally divided head component 14 has a longitudinal direction of the Stützte 2 - upwards in Fig. 7 - Projecting extension 102 with an eye 104 transversely interspersed.

The foot component 12 of the support 2 is longitudinally divided and formed with respect to extension 102 and eye 104 the same as the head component 104th

The head component 14 is, analogous to the coupling sleeve 8, equipped with rib group 52 and latching element 61. The foot component 12 is, analogous to the adjusting sleeve 10, equipped with internal thread 68. As a result, the head component 14 is detachably attached to the second pillar portion 6, and the foot component 12 is detachably attached to the first pillar portion 4. The support 2 can optionally with the second support portion 6 "higher up" (as in Fig. 8 shown) or with the first support section 4 "above" are used.

In Fig. 8 is a section of a concrete wall formwork 100 shown, namely three frame formworks 106, one of which is oriented vertically with its greater length and of which the other two are oriented horizontally with their greater length. Especially clear in the enlargement circle top left in Fig. 8 can be seen an attachment piece 108 to provide a connection between the respective frame formwork 106 and the relevant support. 2

The attachment piece 108 has two abutment plates 110 with which it - in the situation of the magnification circle in the upper left in Fig. 8 - At the top of a metal cross member 112 and at the bottom of this metal support 112 of the frame formwork 106 rests. By means not shown fasteners, the two bearing plates 110 are attached to the addressed carrier 112 of the frame formwork 106.

The attachment piece 108 further includes a first pair of extensions 114 and second pair of extensions 116. The first pair of extensions 114 extends parallel to the contact plates 110, the second pair of extensions 116 is perpendicular to the contact plates 110. In the circle in the upper left in Fig. 8 In the illustrated situation, the head component 14 is connected to the second pair of extensions 116 by pushing the extension 102 of the head component 14 into the clearance space between the two extensions 116 of the attachment piece 108 and a bolt 118 across openings in the second pair of extensions 116 and the eye 104 has been inserted.

At the in Fig. 8 right support 2 is drawn the alternative situation in which the bearing plates 110 of the local attachment piece 108 with the two vertical outer sides of a metal cross member 112 are engaged. In this situation, the connection between the extension 102 of the head piece 14 and the first pair of extensions 114 of the attachment piece 108th

In the magnification circle below in Fig. 8 It is shown how the Fußbestandteil 12 of the support 2 is connected to a Bodenfixier member 120. The extension 102 of the Fußbestandteils 12 is inserted between two side plates of the Bodenfixier component 120 and connected thereto by a cross pin 118.

In the wall formwork 100 of Fig. 8 Actuate the supports 2 as Richtstützen. If, as in most cases, the wall formwork 100 is to be vertically aligned, the length of the respective support is adjusted by means of the coupling sleeve 8 and the adjusting sleeve 10 just to give this vertical orientation. In addition, the directional supports carry by means of Bodenfixier components 120 from the concrete during casting pouring concrete pressure in the building structure on which the wall formwork 100 stands.

At the in Fig. 9 illustrated support 2, the head component 14 is formed as a so-called clevis. The head component 14 is split longitudinally, and, as in the embodiment of Fig. 5 , provided with internal thread 68 for engagement with the male threaded portion 34 of the first support portion 4. The foot component 12 is like the foot component 12 in the embodiment according to Fig. 5 formed and releasably secured to the second support portion 6.

The head component 14 has a support plate 122, and in the region of four corners of the substantially rectangular support plate 122 depending project an angle iron 124 at right angles to the Auflagerungsplatte 122 upwards. In a first horizontal direction 126, the respective adjacent angle irons 124 are positioned at a smaller mutual distance, and in the orthogonal second horizontal direction 128, the respective adjacent angle irons 124 are positioned at greater mutual distance. If one uses the "lane" with the smaller distance 126, one can insert in this alley a carrier 130 a slab formwork, which rests on the Auflagerungsplatte 122 and is held on both sides between two pairs of angle iron. On the other hand, using the wider "alley" 128, two supports 130 may be placed side by side on the support plate 122, typically the overlapping end portions of two supports 130 (see Figs Fig. 10 ). Both carriers 130 are held together on both sides by the four angle iron 124.

In Fig. 11 an example of how to use supports 2 according to the invention for scaffolding is shown. Two main types of scaffolding, come into consideration for the supports according to the invention, are scaffolding, which is built on the outside walls of buildings, and so-called empty scaffolding, which are in principle free in space and serve to carry in particular people, material or formwork at a considerable height. A typical example is empty scaffolding under bridge arches or in churches, if you have to perform work from the inside at the church ceiling. But you can also represent other types of scaffolds using inventive columns, z. B. Scaffolding in exhibition halls and much more.

In Fig. 11 a "slice" 132 of a scaffold is shown. One or more further discs 132 close at a distance in front of and / or behind the plane of the drawing.

The drawn disc 132 consists of two successive columns 2 left, two successive columns 2 right, and crossbars 134 between them. In each case, the head component 14 of the lower support 2 is connected to the foot component 12 of the upper support 2, z. B. by means of bolts that go through the base plates 80 and 82. The cross bar 134, which are each constructed in the manner of a truss, are formed at both ends so that these ends can reach into the outer longitudinal grooves 22 of the first support sections 4 and are held there because of the above-described undercuts 24 against lateral withdrawal.

Between the in Fig. 1 shown disc 132 and the front and / or behind the plane adjacent another disc 132 are also cross bar desired length, which also engage in the manner described in outer longitudinal grooves 22 of the first column sections 4 and are held there.

On the uppermost cross bar 134 of the disc 132 may be placed on a floor covering of plate-like or screed-like elements.

Due to the length adjustability of the supports 2 according to the invention can compensate in particular uneven floors, so that the whole overhead column ends lie at least for a part number of the total columns in a common plane; The same applies at least for a number of parts of the crossbars 134. Furthermore, you can adjust the height level on which the very top end of each overall support, by means of the coupling sleeves 8 and the adjusting sleeves 10 exactly what z. B. is advantageous if the framework above a formwork z. B. should wear for a bridge arch.

In the Fig. 12 Drawn scaffold plate 132 differs from that in Fig. 11 Drawn scaffolding plate 132, characterized in that instead of two, aligned with each other, first support sections 4 has provided an approximately twice as long, first support section 4. In this long, first support section 4, a second Stützützenabschitt 6 is telescopically inserted from below, and in the upper end of the first support section 4 from the top another, second support section 6 is telescopically inserted.

In the Fig. 13 illustrated hall 136 is constructed with two stands 132, of which each one frame 132 extends along a longitudinal boundary of the hall 136. In Fig. 13 you can see a "slice" of each frame 132. Further discs close in front of and behind the plane of the drawing. The frameworks 132 have the same structure as those in FIG Fig. 11 drawn and described there framework 132. For the use of cross bars 134 that applies in connection with FIGS. 11 and 12 Said.

On top of the scaffolds 132, an inverted V-shaped roof construction 138 is placed.

The four "hall walls" may be open or closed by panels inserted into the frameworks 132 or otherwise.

In Fig. 14 a grandstand 140 is drawn in horizontal view. Shown again is a "disc" of the grandstand 140, with more discs in front of and behind the plane of the drawing. It can be seen that the staircase-like structure of the grandstand 140 can be created with the supports 2 according to the invention in a particularly simple manner.

Also in the tribune 140 in turn cross bar 134 at appropriate locations in the plane of the disc and at right angles to this from support to support 2 are present.

In Fig. 15 a trench shoring 142 is shown. A trench 144 extends in the soil 146, with the longitudinal extent of the trench 144 being at right angles to the plane of the drawing. Down in the trench 144 is a sewer pipe 148th

The Grabenverbau 142 has as main components a strong, in Fig. 15 left plate 150 and a strong, in Fig. 15 right plate 152 on. The plates 150 and 152, measured at right angles to the plane of the drawing, have a length of a few meters.

In the sectional plane of the Fig. 15 extend over each other two substantially horizontal, inventive supports 2. In another plane parallel behind the plane of the drawing Fig. 15 Similarly, there are two supports 2. All supports 2 may be hingedly connected to the plates 150 and 152 so that upon slight lifting of only one of the plates 150, 152 there is a reduction in the plate spacing, thereby easily removing the trench structure 142 from the trench 144 can be pulled up when the trench 144 is to be refilled. Since the supports 2 are adjustable in length, the trench structure 142 can be moved downwardly into the earth at a reduced spacing of the plates 150, 152 stepwise and in accordance with the progress of excavation of the trench 144, and can then be moved out of the first through the second support section 6 respectively Support section 4, and thus a moving apart of the plates 150, 152, the trench extension 142 with its plates 150, 152 press against the trench walls.

In all illustrated embodiments, each of the Fußbestandteil 12 and the head component 14 were provided in a longitudinally split design. It is emphasized that it is particularly the foot component 12 and / or the head component 14 alternatively in undivided Can realize performance. This is due to the absence of annular groove 70 and annular rib 72 (as described in connection with coupling sleeve 8 and adjusting sleeve 10, see Fig. 4 ) is even less problematic than in the coupling sleeve 8 and the adjustment sleeve 10. One will make the choice between longitudinally split design and undivided execution in practical terms, in particular with regard to manufacturability and overall strength.

If one chooses a longitudinally split design, there is one of several possible ways to provide analogous as in the described coupling sleeve 8 and the adjusting sleeve 10 described screws 44, 46 and 46 positioning holes.

It is emphasized that in the support according to the invention it is by no means obligatory to work with removably attached foot component 12 and / or detachably mounted head component 14. You could instead z. B. work with a bottom welded base plate and / or a top welded base plate. However, it is practical to have a releasably attached component at least at one end of the support 2, if only because then you can switch between different foot components 12 and / or head components 14, like the Fig. 5 to 10 to show some examples.

Claims (18)

Adjustable length support for concreting or scaffolding, comprising: (A) a first support portion which has a hollow cross-section at least in a part of its length which includes a first end of the first support portion and which has a male threaded portion at least in that of its two end portions to which the hollow first end belongs; (B) a second support portion which sits with a part of its length telescopically displaceable in the first support portion and which has at least in a portion of its length on the outside, circumferentially extending ribs and / or grooves which extend over only a portion of the circumferential length; (C) a coupling sleeve, which has on the inside at least one, circumferentially extending groove and / or rib, which extends over only a portion of the circumferential length and at each appropriate rotational position of the coupling sleeve relative to the second support portion either engaged or disengaged with said Ribs and / or grooves of the second support portion is; and (D) an adjustment sleeve having an internal thread, which is in engagement with said external thread portion of the first support portion, and which is with the coupling sleeve in a rotatable, but in the longitudinal direction of the support bidirectionally effective, positive engagement. Support according to claim 1,
characterized in that the first support portion is profiled at least in said part of its length on the inner circumference and the second support portion in said part of its length on the outer circumference in such a way and to each other that the second support portion is held against rotation relative to the first support portion. Support according to claim 1 or 2,
characterized in that the male threaded portion of the first pillar portion and / or the circumferentially extending ridges and / or grooves of the second pillar portion (each) is constructed of a plurality of sectors distributed around the circumference. Support according to one of claims 1 to 3,
characterized in that the coupling sleeve and / or Verstellmuffe consists of two halves, which are joined together on a plane extending in the axial direction of the coupling sleeve and the Verstellmuffe dividing plane. Support according to one of claims 1 to 4,
characterized in that the coupling sleeve has at least one latching element which, cooperating with a counterpart on the second support portion releasably holds the coupling sleeve locked in a rotational angular position relative to the second support portion in which said engagement with the ribs and / or grooves of the second support portion consists , Support according to one of claims 1 to 5,
characterized in that said engagement between the coupling sleeve and the adjusting sleeve is formed by an annular groove / annular rib engagement. Support according to one of claims 1 to 6,
characterized in that at the end of the first support portion, which is opposite to the Verstellmuffe, a first end component of the support is releasably secured. Support according to one of claims 1 to 7,
characterized in that at that end of the second support section, which is telescopically in the first support section received portion of the length of the second support portion is opposite, a second end component of the support is releasably attached. Support according to claim 7 or 8,
characterized in that the first end component has a hollow portion with an internal thread engaging with another male threaded portion on the first pillar portion. Support according to one of claims 7 to 9,
characterized in that the second end component comprises a hollow portion having inside at least one circumferentially extending groove and / or rib which extends over only a portion of the circumferential length and at each mating angular position of the second end member relative to the second support portion either engaged or disengaged Engagement with said ribs and / or grooves of the second support portion is. Support according to one of claims 7 to 10,
characterized in that the first end component or the second end component comprises a head component for cooperating with longitudinal beams of a concrete slab formwork, or a head component for interacting with formwork slabs of a concrete slab formwork, or a head component for cooperating with longitudinal beams and / or formwork slabs of a concrete slab formwork, or a head component for angled connection to a concreting wall formwork. Support according to one of claims 1 to 11,
characterized in that at least one of the components - Coupling sleeve, - adjustment sleeve, Foot component, - head component, essentially a plastic component. Betonierungs slab formwork,
characterized in that it includes supports according to one of claims 1 to 12. Betonierungs wall formwork,
characterized in that it includes directional supports according to one of claims 1 to 12. Scaffolding in construction,
characterized in that it includes supports according to one of claims 1 to 12. Tribune,
characterized in that its supporting structure comprises supports according to one of claims 1 to 12. Hall,
characterized in that its supporting structure comprises supports according to one of claims 1 to 12. Grabenverbau, which has two Verbauplatten and Spreizstützen between the Verbauplatten,
characterized in that at least one of the spreader supports is a support according to any one of claims 1 to 12th

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