WALL FORMWORK WITH SLEEVE FOR ANCHOR HOLES, SLEEVE AND CLEANING METHOD

Abstract

The invention relates to a wall formwork for the construction of walls with a formwork facing and elements which support the formwork facing, with several anchor holes which pass through supporting elements, with a sleeve made of plastic which is held in a force-fit and/or form-fit manner in an anchor hole, wherein the sleeve extends from one end of the anchor hole to the other end of the anchor hole, and wherein the outer face of the sleeve tightly abuts the inner face of the anchor hole at the side of the formwork facing, characterized in that each anchor hole comprises a sleeve. The invention further relates to a method for cleaning a wall formwork with the features according to one of the preceding claims, characterized in that concrete is driven out of an anchor hole.

Claims

1. A wall formwork for the construction of walls with a formwork facing and elements which support the formwork facing, with several anchor holes which pass through supporting elements, with a sleeve made of plastic which is held in a force-fit and/or form-fit manner in an anchor hole, wherein the sleeve extends from one end of the anchor hole to the other end of the anchor hole, and wherein the outer face of the sleeve tightly abuts the inner face of the anchor hole at the side of the formwork facing, characterized in that each anchor hole comprises a sleeve.

2. The wall formwork according to claim 1, characterized in that the sleeve comprises a flange which prevents the sleeve from being pulled outwards out of the wall formwork.

3. The wall formwork according to claim 2, characterized in that the flange rests on a supporting element.

4. The wall formwork according to claim 2, characterized in that the flange is flush with the formwork facing and/or with the anchor hole.

5. The wall formwork according to claim 4, characterized in that the flange is located in an enlargement of the anchor hole or in a recess of the formwork facing.

6. The wall formwork according to claim 1, characterized in that at least one sleeve (4) is closed by a cap (14) at the side of the formwork facing.

7. The wall formwork according to claim 1, characterized in that the sleeve has grooves on its outer face.

8. The wall formwork according to claim 7, characterized in that the grooves run parallel to the longitudinal axis of the sleeve.

9. The wall formwork according to claim 7, characterized in that at one end of the sleeve there is a section which is free of grooves and which tightly abuts the inner face of the anchor hole.

10. The wall formwork according to claim 1, characterized in that the sleeve comprises a flange on only one side.

11. The wall formwork according to claim 1, characterized in that the sleeve comprises a seal of elastic material on the side of the formwork facing.

12. The wall formwork according to claim 11, characterized in that the seal comprises a protruding bead and/or an inwardly projecting lip.

13. The wall formwork according to claim 1, characterized in that the sleeve has an internal thread.

14. The wall formwork according to claim 1, characterized in that the sleeve is held in the anchor hole in a form-fit manner by one or more latching elements.

15. A sleeve for a wall formwork according to claim 1, with only one flange at one end and grooves on the outer face reaching the other end of the sleeve but not the flange, so that a section is free of grooves.

16. A method for cleaning a wall formwork with the features according to claim 1, characterized in that concrete is knocked out of an anchor hole.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0025] In the following, the invention is further explained using figures. The figures show:

[0026] FIG. 1: section through wall formworks installed opposite each other;

[0027] FIG. 2: enlarged section from FIG. 1;

[0028] FIG. 3: Sleeve;

[0029] FIG. 4: Sleeve with latching element;

[0030] FIG. 5: Sleeve with latching elements and seal;

[0031] FIG. 6: Sleeve with cap as cover;

[0032] FIG. 7: Sleeve with internal thread and latched latching elements;

[0033] FIG. 8: Sleeve with flange in funnel-shaped enlargement of the anchor hole;

[0034] FIG. 9: Sleeve with flange in step-shaped enlargement of the anchor hole; and

[0035] FIG. 10: Sleeve with resilient locking element.

DETAILED DESCRIPTION OF THE INVENTION

[0036] FIG. 1 shows a section through wall formworks installed opposite each other for the construction of walls with a formwork facing 1 and elements 2 which support the formwork facing. The elements 2 are beams made of steel.

[0037] Anchor holes 3 pass through the supporting elements 2. In each anchor hole 3, a sleeve 4 made of plastic is held in a force-fit manner. Each sleeve 4 is therefore held in the anchor hole 3 by static friction. The sleeve 4 extends from one end of the anchor hole 3 to the other end of the anchor hole 3. On the outer face, each sleeve 4 is flush with the anchor hole 3. The inner wall of each anchor hole 3 is therefore completely covered by the sleeve 4. The outer face of each sleeve 4 tightly borders the inner face of the anchor hole 3 at the side of the formwork facing so that no concrete can flow between the sleeve 4 and the anchor hole 3 from the side of the formwork facing.

[0038] Each sleeve 4 has a flange 5 on the side of the formwork facing which rests on the beam 2. Therefore, the sleeves 4 cannot be pulled outwards out of the anchor hole 3. The flange 5 is flush with the formwork facing 1. Thus, the flange 5 neither protrudes from the formwork facing 1 nor is it set back from the formwork facing 1. The flange 5 is located in a recess of the formwork facing 1. The gap between the flange 5 and the formwork facing 1 is minimal, so that no concrete or almost no concrete can flow in. This allows a correspondingly evenly smooth surface of a concrete wall to be produced even in the area of the anchor holes.

[0039] Each circumferential surface of the sleeves 4 has grooves 6 on the outer face (see the enlarged illustration in FIG. 2, which shows section V of FIG. 1). The grooves 6 run parallel to the longitudinal axis of each sleeve 4. The grooves 6 extend towards the outside, i.e. to the end opposite the formwork facing. The grooves 6 therefore reach up to the locking devices 7, which connect the anchor rod 8 to the wall formworks.

[0040] The anchor rod 8 is inserted through the anchor holes 3 and protrudes on both outer sides. At the both ends of the anchor rod 8 there is a thread 9, respectively, onto which the locking devices 7 are screwed. The section between the two threads 9 has a smooth surface or a sleeve with a smooth surface so that the anchor rod 8 can be pulled out after concreting.

[0041] The grooves 6 reach close to the end which lies at the formwork facing 1, without reaching this end. This leaves a tight connection 10 between an outer face of each sleeve 4 and the inner face of the associated anchor hole 3, into which concrete cannot flow.

[0042] FIG. 3 shows the sleeve 4 in a perspective view. Sleeve 4 is manufactured in one piece. Thus, no parts have been manufactured separately from each other and then joined together to form the sleeve.

[0043] FIG. 4 shows a sleeve 4 manufactured in one piece, which additionally has one or more latching elements 11. The one or more latching elements 11 protrude outwards and thus form projections. The one or more latching elements 11 can latch in corresponding recesses in the anchor hole. This allows the sleeve 4 to be held in an anchor hole in a form-fit manner. Latching elements 11 can be arranged distributed around the sleeve circumference. Latching elements 11 are preferably arranged above the grooves 6. Since the material of the sleeve, too, is elastic to a certain degree, the latching elements can be made of a solid material. In this case, the latching elements are therefore not resiliently protruding lug.

[0044] The grooves 6 shown in FIG. 4 run parallel to the longitudinal axis of the sleeve 4 and reach the end of the sleeve 4 that does not have a flange, so that the sleeve 4 can be inserted into an anchor hole with this end.

[0045] FIG. 5 shows a section through a sleeve 4 which, compared to the sleeve 4 shown in FIG. 4, additionally has seal. The seal is mounted on the flange 5 and has an upwardly protruding annular bead 12 and an inwardly directed annular sealing lip 13 projecting laterally from it. The seal is made of an elastic plastic material. The protruding bead 12 can provide a tight connection between a cap and the flange 5 so that an unused anchor hole can be closed particularly reliably by a cap. The inwardly directed sealing lip 13 can provide a particularly tight connection to an anchor rod inserted through it, as the sealing lip 13 reduces the internal diameter of the “sleeve” component.

[0046] FIG. 5 illustrates that the latching elements 11 run ramp-shaped towards the flange 5 and thus ramp-shaped towards the formwork facing when the sleeve is inserted in an anchor hole.

[0047] A cap 14, which closes the opening of the sleeve 4 on the side of the flange 5, is shown in FIG. 6. This can be connected to the sleeve 4 in a force-fit and/or form-fit manner

[0048] Sleeve 4 may have an internal thread 14 as shown in FIG. 7. As the sleeve 4 cannot be pulled outwards out of a wall formwork, the internal thread 15 can be used very reliably for fixing other components. The internal thread 15 is preferably limited to one half of the sleeve, so that the internal thread does not excessively hinder concrete from being knocked out.

[0049] The internal thread 15 is preferably located in the half of the sleeve facing away from the side of the formwork facing, i.e. on the outside of the wall formwork. Concrete enters this area last, so that it is advantageous to limit the internal thread to the half at the outside.

[0050] The internal thread 15 is used in one embodiment to fasten a cap 14. A thread is then also attached to the cap 15, which can be screwed into the internal thread 15. The cap 15 can thus cover an unused anchor hole 3 particularly reliably.

[0051] FIG. 7 also shows latching elements 11 which are latched in recesses 16 of the supporting element 2.

[0052] Concrete can be knocked out of sleeve 4 relatively easily due to the plastic material. As the sleeve 4 is made of plastic, it can be knocked out of an anchor hole 3 even if latching elements 11 are latched in recesses of the anchor hole 3.

[0053] FIG. 8 shows a configuration with a flange 5 of the sleeve 4, which is located in an enlargement 17 of the anchor hole 3. The enlargement 17 is funnel-shaped. The inner diameter of the anchor hole 3 thus increases in the area of the enlargement 17. The flange 5 rests on the bottom of the enlargement 17 and thus on the funnel-shaped wall of the enlargement 17. The flange 5 is flush with the anchor hole 3. The then visible surface of the flange 5 and the then visible edge of the anchor hole 3, i.e. the surface of the supporting element 2 adjacent to the enlargement 17, form a common plane. The formwork facing 1 is laterally adjacent to the visible edge 18 of the anchor hole 3. The formwork facing 1 is flush with the anchor hole 3. The surface of the formwork facing 1 and the edge 18 of the anchor hole 8 which are then visible then form a common plane. A flat surface is then formed by the flange 5, the visible edge 18 of the anchor hole 3 and the adjacent formwork facing 1. The formwork facing 1 extends into a step-shaped recess 19 of the supporting element 2 and is thus held by the supporting element 2.

[0054] The extension 17 can also be step-shaped, for example, as shown in FIG. 9.

[0055] FIG. 10 shows a sleeve 4 manufactured in one piece which comprises one or more latching elements 11. The one or more latching elements 11 protrude outwards and thus form projections. Above each latching element 11 there is a slot 20. This allows each latching element 11 to pivot resiliently relative to the sleeve, which facilitates inserting the sleeve 4 into an anchor hole. The latching elements 11 in this configuration are therefore elastically flexible relative to the rest of the sleeve.

[0056] The foregoing invention has been described in accordance with the relevant legal standards, thus the description is exemplary rather than limiting in nature. Variations and modifications to the disclosed embodiment may become apparent to those skilled in the art and fall within the scope of the invention.