EP0888486A1

EP0888486A1 - Stop element holder for wall formwork

Info

Publication number: EP0888486A1
Application number: EP97906072A
Authority: EP
Inventors: Giulio Albanese
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-22
Filing date: 1997-03-13
Publication date: 1999-01-07
Anticipated expiration: 2017-03-13
Also published as: DE59707918D1; EP1197617B1; ATE221946T1; EP1197617A1; EP0888486B1; ATE299979T1; DE59712375D1; WO1997036070A1; AU2089897A; DE19780234D2

Abstract

The stop holder (14) has an accommodation aperture (34) for the reinforcement iron (12) and is rotatable before its fixation around the axis of the reinforcement iron. The stop is formed as a curved stop surface (18) with a permanently altering distance from the axis of the reinforcement iron. The curvature of the stop surface is circular or elliptical. The axis of the reinforcement iron is eccentric to the cylinder or ellipse axis. The accommodation aperture for the reinforcement connecting iron is formed as a back-cut groove (32) for receiving a wedge-shaped component (36) which can be driven between the reinforcement iron and counter surfaces (30) of the groove.

Description

Stop bracket for wall formwork

The invention relates to a stop holder with a stop for a wall formwork for erecting a concrete wall on a concrete base, the stop holder being able to be fixed to an upright reinforcing connecting iron by means of a fixing means. Within the scope of the invention there is also a device with a spacer for a wall formwork for erecting a concrete wall on a concrete base, the spacer being connected to a connecting iron by means of a fastening part having a receiving opening for a projecting reinforcing connecting iron and a wedge element which can be inserted into the receiving opening is definable.

From DE-A-4439959 a clamping device for fixing a spacer designed as a crossbar with end stops is known. When erecting a double-sided wall formwork, the spacer is used to set a defined distance between two formwork walls braced against the end stops. The known clamping device consists of a U-shaped profile piece, on the front side of which two diametrically opposite recesses are provided for inserting the spacer. To mount the spacer, the profile piece is placed on the connecting iron and the spacer is inserted into the recesses. After aligning the spacer on a guide line, a wedge is driven in to fix it between the spacer and the connecting iron. The handling of the arrangement consisting of the three parts profile piece, clamping wedge and spacer proves to be cumbersome in practical use. In addition, the precise alignment of the spacer requires a high degree of skill due to the three-part arrangement. The use of the profile piece in the case of different thickness connecting iron. The recesses on each end face are arranged at different distances from the profile rear wall. Before placing the profile piece on the connecting iron, it must be considered which of the two end faces must be used for inserting the spacer given the thickness of the connecting iron, since if the wrong choice is made, the wedge is practically sunk and can only be removed with great difficulty. A further disadvantage also arises if the spacer is centered incorrectly, since it is practically no longer possible to loosen a wedge once it has been driven in. In addition, conventional spacers connect the two formwork walls of a two-sided wall formwork to one another, ie the spacers are continuous from wall to wall. The consequence of this is that a concrete wall created in this way is not watertight, which limits the use of the spacers in certain applications such as walls of reservoirs.

In view of these circumstances, the inventor has set himself the task of creating a stop holder of the type mentioned at the outset which, with simple handling, enables rapid setting with a high level of accuracy. In addition, the stop bracket should also be used to create watertight concrete walls.

A first solution to the task according to the invention is that the stop holder has a receiving opening for the connecting iron and can be rotated about the axis of the connecting iron before it is fixed, the stop being designed as a curved stop surface with a constantly changing distance from the axis of the connecting iron.

In contrast to conventional spacers with a cross bar with end stops that is displaceably guided in a holding part, the stop is integrated in the stop holder according to the invention, ie the part to be fixed to the connecting iron is provided directly with a stop. There- with, together with the locking means, a two-part arrangement is obtained which, by simply rotating the stop holder, enables the stop to be precisely aligned with the guide line.

The stop holder according to the invention is no longer continuous from wall to wall, but instead forms an individual stop to the adjacent formwork wall. As a result, in contrast to conventional spacers, water penetrating along the stop holder can only penetrate the concrete wall to a minor extent and in particular can no longer penetrate it completely. Accordingly, the stop bracket according to the invention is also suitable for the construction of watertight concrete walls.

Thanks to its stop on one side only, the stop holder according to the invention can also be used without problems where a circumferential rubber band is used to prevent seepage water from penetrating the floor of the wall to be created.

In a preferred embodiment of the stop holder according to the invention, the curvature of the stop surface is circular or elliptical. The ellipse shape results in a greater variation of the setting options for the stop distance. In the case of a cylindrical stop surface, the axis of the connecting iron lies eccentrically to the cylinder axis. In the case of an elliptical stop surface, it can lie both in an ellipse axis and eccentrically to it.

Well-known means can be used as fixing means for fixing the stop holder to a connecting iron, e.g. a set screw that braces the stop bracket against the connecting iron.

In a particularly preferred embodiment, the receiving opening for the connecting iron is designed as an undercut groove for receiving a wedge element which can be driven in between the connecting iron and the mating surface of the groove.

The stop holder can, for example, be made in one piece from metal or from a possibly fiber-reinforced plastic. A further possibility is seen in the fact that the stop holder consists of a stop part which has the stop surface and a fastening part which is rigidly connected to it and has the undercut groove.

In the particularly preferred embodiment, the fastening part is designed as a profile piece with a substantially U-shaped cross-section, the free ends of the U-legs being angled inwards to form the counter surfaces. To simplify the centering of the profile piece on the connecting iron, the U-legs can have one or more kinks.

In a further preferred embodiment, the free ends of the U-legs are angled such that they can be brought into engagement with corresponding longitudinal grooves in the wedge element. This increases the stability of the entire arrangement.

The profile piece can, for example, be made of metal and inserted into a stop part made of plastic. It is also conceivable that the stop part consists of metal and is coated or coated with plastic.

To increase the stability of the arrangement, the wedge element can rest in the inserted position on the connecting iron via an angled head part. Furthermore, the head part can have a transverse groove for receiving a conventional spacer. In another possible configuration of the wedge element, it can be used directly as a holding part for a spacer may be formed.

A second solution to the problem according to the invention is that the wedge element can be driven in between the connecting iron and a counter surface of the fastening part and fixes the spacer in the inserted position.

In a preferred embodiment of the device according to the invention, the wedge element clamps the spacer to the connecting iron by means of a cross bar. when the wedge is driven in, the crossbar positioned between the wedge and the connecting iron is clamped, the crossbar being in direct contact with the connecting iron after wedging.

In principle, the fastening part can consist of a piece of pipe which is put over the connecting iron. However, since this is often not possible and is also cumbersome, the fastening part preferably has a receiving opening on the long side, which is designed as an undercut groove to form counter-surfaces. The fastening part is preferably designed as a profile piece with an essentially U-shaped cross-section, the free ends of the U-legs being angled inwards to form the counter surfaces. To simplify the centering of the profile piece on the connecting iron, the U-legs can have one or more kinks.

In a further preferred embodiment, the free ends of the U-legs are angled in such a way that they can be brought into engagement with corresponding longitudinal grooves in the wedge element. This increases the stability of the entire arrangement.

A particularly simple handling of the arrangement according to the invention results with a transverse groove provided in a head part of the wedge element, into which the transverse rod of the Spacer is used before wedging. Thanks to this measure, the arrangement according to the invention practically only consists of the two parts of profile piece and wedge with an inserted spacer.

To further simplify the handling of the arrangement according to the invention, the crossbar of the spacer inserted into the transverse groove can be encompassed by at least one bow-like shape on the head part. The spacer and the wedge element can thus be preassembled, so that in each case only two parts have to be delivered to the construction site.

In a variant of the device according to the invention, the wedge element is designed directly as a holding part for a spacer which can be locked in this.

The fastening part or the profile piece expediently consists of metal. However, it is also conceivable for the fastening part to be made of a single to manufacture fiber-reinforced plastic.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows schematically in

Fig. 1 is a side view of a stop holder;

2 shows a cross section through the stop holder of Figure 1 along the line I-I;

3 shows the top view of a wedge element shown in FIG. 1;

4 shows the alignment of a stop on a directional cord; 5 shows a side view of a wedge element with an integrated spacer;

6 shows the top view of the wedge element from FIG. 5;

7 shows a side view of the wedge element from FIG. 1 with a spacer inserted;

8 shows the top view of the wedge element from FIG. 7;

9 shows a cross section through a special profile piece of a stop holder. ;

10 shows a side view of an arrangement with an inserted spacer;

11 shows a cross section through the arrangement of Figure 10 along the line I-I.

Fig.12 the top view of the arrangement of Fig.10;

13 shows a side view of a wedge element with an integrated spacer;

14 shows the top view of the wedge element from FIG. 13;

15 shows a side view of a further arrangement with a spacer inserted;

16 shows the top view of the arrangement of FIG. 15 with a spacer inserted;

17 shows a cross section through the profile piece of the arrangement from FIG. 15;

18 shows a variant of the arrangement from FIG. 15. According to FIG. 1, a reinforcing connection iron 12 with a stop bracket 14 fixed thereon protrudes from a concrete floor 10. The stop holder 14 consists of a cylindrical stop part 16 with the cylindrical jacket surface as the stop surface 18 and a profile piece 20 rigidly connected to the stop part 16 as a fastening part for fixing the stop holder 14 on the connecting iron 12. The axis z of the connecting iron 12 lies opposite the axis t of the cylindrical stop part 16 eccentrically. Accordingly, the distance r from the axis z to the stop surface 18 changes continuously. Of course, in deviation from the embodiment shown, the stop part 16 and the profile piece 20 can be of the same height with respect to the axis z of the connecting iron 12.

2 has an essentially U-shaped cross section. The leg parts 22 merge into lower leg parts 26 at a weak kink 24 and form a relatively narrow radius in the profile base 28. Due to the special cross-sectional design of the profile piece 20, automatic centering takes place when the stop holder is placed on the connecting iron. The free ends of the leg parts 22 are angled inwards to form counter surfaces 30.

The profile piece 20 has the shape of an undercut groove 32 with a receiving opening 34 for the connecting iron 12. A wedge 36 is inserted into the undercut groove 32, which on the one hand the reinforcing iron 12 and on the other hand the profile piece 20 via its counter surfaces 30 lies.

The wedge 36 has a head part 38 forming a striking surface 40 for a hammer, which is angled and over a

Contact surface 44 abuts the connecting iron 12. This second support point removed from the profile piece 20 results increased stability of the connection. A transverse groove 42 is provided in the head portion 38 of the key 36 for additional use of a conventional spacer.

The aiming of the stop holder 14 on a guide line 46 is readily apparent from the consideration of FIG. 4. After the stop holder 14 has been placed on a connecting iron 12, the wedge 36 is loosely inserted from above into the profile piece 20 between connecting iron 12 and counter surfaces 30 used. The free rotatability about the axis z of the connecting iron 12 is maintained for the time being. The stop holder 14 is then rotated until it touches the alignment line 46 and is fixed in its final position by driving in the wedge 36. The meaning of the axis z of the connecting iron 12 which is eccentric with respect to the axis t of the stop part 16 can be clearly seen from the three exemplary positions of the stop holder 14. The guide line 46a, b, c arranged in three different distances touches the stop surface 18 in each case at a point 48a, b, c. By turning the stop holder 14, the distance r,. , from the axis z of the connecting iron 12 to the respective stop point 48a, b, c accordingly.

5 to 8 show further possible uses of the stop bracket 14.

5 and 6, the wedge element is designed as a holding part 50 for a conventional spacer 52 with a cross bar 53 and end stops 54 made of plastic. The holding part 50 is equipped with a U-shaped sheet metal band 56 made of spring steel. The transverse rod 53 guided in opposite bushings 58 in the sheet metal strip 56 can be freely moved by compressing the sheet metal strip 56 and aligned with a guide line. Due to the pretensioning of the sheet metal strip 56, the spacer 52 remains automatically fixed in every displacement position. 7 and 8 show a further possibility for fixing a spacer 52. The cross bar 53 of the spacer 52 is inserted in the transverse groove 42 of the wedge 36 shown in FIG. 1 and fixed when the wedge 36 is driven into the profile piece 20 on the connecting iron 12 . Here, the crossbar 53 forms the second contact point of the wedge 36 on the connecting iron 12 instead of the head part 38.

9 shows a special embodiment of the profile piece 20. Here, the free ends of the legs 22 are angled such that they engage with an end edge 31 in grooves 37 formed on the outside of the wedge 36. When the wedge 36 is inserted, this results in a clamp between the latter and the profile piece 20, which increases the stability of the entire arrangement. In addition, the two leg parts 22 have two kinks 24a, b, as a result of which the centering of the profile piece 20 on reinforcement connecting irons 12 of different dimensions is further improved.

According to FIG. 10, a reinforcing connecting iron 112 with a profile piece 114 attached to it and having an essentially U-shaped cross section protrudes from a concrete floor 110.

As shown in FIG. 11, the leg parts 116 merge into lower leg parts 120 at a weak kink 118 and form a relatively narrow radius in the profile base 122. The special cross-sectional design of the profile piece 114 means that the profile piece is automatically centered when the profile piece is placed on the connecting iron. The free ends of the leg parts 116 are angled inwards to form counter surfaces 124.

The profile piece 114 has the shape of an undercut groove 126 with a receiving opening 128 for the connecting iron 112. A wedge 130 is inserted into the undercut groove 126, which on the one hand the reinforcing iron 112 and other on the part of the profile piece 114 lies on its counter surfaces 124.

The wedge 130 has a striking surface 134 for an angled head part 132 forming a hammer with a cutout 136 adapted to the connecting iron 112. A conventional spacer 140 with a cross bar 142 and end stops 144 made of plastic are inserted into a transverse groove 138 arranged in the head part 132 of the wedge 130.

The advantages of this type of fastening for a conventional spacer result readily from the consideration of FIG. 10 and from the following description of the setting of a spacer.

The profile piece 114 is placed on the corresponding connecting iron 112 and the wedge 130 is inserted into the profile piece 114 with the spacer 140 inserted into the transverse groove 138. The manual force is sufficient to pre-fix the arrangement. By moving the cross bar 142 in the transverse groove 138 and possibly rotating the entire arrangement, the end stops 144 of the spacer 140 are aligned with a directional cord and the arrangement is centered. The final fixation takes place by striking with a hammer on the striking surface 134. If the spacer 140 is incorrectly centered, the wedge can be released very easily and quickly by a hammer blow from below against the wedge 130 or the crossbar 142.

Compared to conventional types of fastening for spacers, the handling of the present arrangement is considerably easier because it is practically reduced to the two parts of the profile piece and the wedge with a spacer inserted therein. In addition to the problem-free assembly of the two parts, a further advantage is that, as a result of the pre-fixing, the spacer no longer slips when the wedge is driven in. The insertion of the wedge 130, centering the cross bar 142 and pre-fixing the arrangement is thus only a single work step and leads to considerable time savings when setting the spacer 140.

10 also readily shows that the arrangement according to the invention is universally suitable for connecting irons of any diameter. Corresponding to the thickness of the connecting iron 112, the wedge 130 more or less sinks into the profile piece 114.

13 and 14, the wedge element is designed as a holding part 146 for a conventional spacer 140 with a cross bar 142 and end stops 144 made of plastic. The holding part 146 is equipped with a U-shaped sheet metal band 148 made of spring steel. The crossbar 142 guided in opposite bushings 150 in the sheet metal strip 148 can be freely moved by compressing the sheet metal strip 148 and aligned with a guide line. By prestressing the sheet metal strip 148, the spacer 140 remains automatically fixed in every displacement position.

15 to 17 a special configuration of the profile piece 114 and the wedge element 130 is shown.

The free ends of the legs 116 on the profile piece 114 are angled such that they engage with an end edge 125 in grooves 131 formed on the outside of the wedge 130. This results in a wedge 130 inserted between this and the profile piece 114, which increases the stability of the entire arrangement. In addition, the two leg parts 116 have two kinks 118a, b, which further improves the centering of the profile piece 114 on connecting rods 112 of different dimensions.

Brackets 133 are formed on the head part 132 such that they include the cross bar 142 of the spacer 140. This special embodiment of the head part 132 enables the preassembly of the wedge 130 with the spacer 140, the crossbar 142 between the transverse groove 138 and the bracket 133 having a play necessary for straightening the spacer.

Fig. 18 shows a wedge element 130, the head part 132 with bracket 133 is adapted to the U-shaped cross section of a cross bar 142a.

Claims

claims

1. stop holder with a stop for a wall formwork for erecting a concrete wall on a concrete sub-base (10), the stop holder (14) being fixable to a protruding reinforcing connecting iron (12) by means of a fixing means,

characterized in that

the stop holder (14) has a receiving opening (34) for the connecting iron (12) and can be rotated about its axis (z) of the connecting iron (12) before it is fixed, the stop as a curved stop surface (18) with the axis ( z) of the connecting iron (12) is a constantly changing distance (r).

2. Stop holder according to claim 1, characterized gekennzeich¬ net that the curvature of the stop surface (18) is circular or elliptical.

3. stop holder according to claim 2, characterized gekennzeich¬ net that the stop holder (14) has a cylindrical or elliptical stop surface (18) and the axis (z) of the connecting iron (12) is eccentric to the cylinder or ellipse axis (t).

4. stop holder according to one of claims 1 to 3, da¬ characterized in that the receiving opening (34) for the connecting iron (12) as an undercut groove (32) for receiving a between connecting iron (12) and counter surfaces (30) of the groove ( 32) drivable wedge element (36) is formed.

5. stop holder according to claim 4, characterized gekennzeich¬ net that the stop holder (14) from a stop surface (18) having stop part (16) and there is a fastening part (20) rigidly connected to it and having the undercut groove (32).

6. Stop holder according to claim 5, characterized in that the fastening part is designed as a profile piece (20) with a substantially U-shaped cross section, the free ends of the U-legs (22) forming the counter surfaces (30) are angled inwards.

7. stop holder according to claim 6, characterized gekennzeich¬ net that the free ends of the U-legs (22) at least each have a kink (24,24a, b).

8. Stop holder according to claim 6 or 7, characterized gekenn¬ characterized in that the free ends of the U-legs (22) are angled such that their end edges (31) with corresponding longitudinal grooves (37) in the wedge element (36) can be brought into engagement .

9. Stop holder according to one of claims 4 to 8, characterized in that the wedge element (36) lies in the inserted position via an angled head part (38) on the connecting iron (12).

10. Stop holder according to claim 9, characterized in that a transverse groove (42) for receiving a spacer (52) is provided in the head part (38).

11. Stop holder according to one of claims 4 to 8, characterized in that the wedge element (36) is formed as a holding part (50) for a spacer (52).

12. Device with a spacer for a wall formwork for erecting a concrete wall on a concrete th subsurface (110), the spacer (140) being attached to one by means of a fastening part (114) having a receiving opening (128) for a projecting reinforcing connecting iron (112) and a wedge element (130) which can be inserted into the receiving opening (128) Connecting iron can be fixed,

characterized in that

the wedge element (130) can be driven between the connecting iron (112) and a counter surface (124) of the fastening part (114) and fixes the spacer (140) in the inserted position.

13. The apparatus according to claim 12, characterized in that the wedge element (130) fixes the spacer (140) via a cross bar (142) by clamping on the connecting iron (112).

14. The apparatus according to claim 12, characterized in that the wedge element (130) is designed as a holding part (146) for a spacer (140) which can be locked therein.

15. Device according to one of claims 12 to 14, characterized in that the receiving opening (128) of the fastening part (114) for forming counter surfaces (130) is designed as an undercut groove (126).

16. The apparatus according to claim 15, characterized in that the fastening part is designed as a profile piece (114) with a substantially U-shaped cross section, the free ends of the U-legs (116) forming the counter surfaces (130 ) are angled inwards.

17. The apparatus according to claim 16, characterized in that the free ends of the U-legs (116) each have at least one kink (118, 118a, b).

18. The apparatus of claim 16 or 17, characterized gekenn¬ characterized in that the free ends of the U-legs (116) are angled such that their end edges (125) with corresponding longitudinal grooves (131) in the wedge element (130) can be brought into engagement .

19. Device according to one of claims 13 or 15 to 18, characterized in that in a head part (132) of the wedge element (130) is provided a transverse groove (138) for receiving the transverse rod (142) of the spacer (140).

20. The apparatus according to claim 19, characterized in that the transverse rod (142) of the spacer (140) inserted into the transverse groove (138) is surrounded by at least one bow-like shape (133) on the head part (132).