ANCHOR SLEEVE, ARRANGEMENT AND METHOD FOR ATTACHING

Description

[0001] The invention relates to an anchor sleeve for an injection system for securing an anchor element in an opening in an object, in particular in a borehole in masonry. The invention also relates to an arrangement with an anchor element and an anchor sleeve according to the invention. The invention also relates to a method for securing an anchor element in an opening of an object by means of an anchor sleeve according to the invention.

[0002] Anchor sleeves for injection systems used to secure an anchor element in a borehole are known; see, for example, the Würth sieve sleeve SH16x85, item no. 090344164. This anchor sleeve, also known as a sieve sleeve, is equipped with a sieve, at least in sections, around its circumference. The anchor sleeve is inserted into a borehole and then filled with injection mortar. An anchor element, typically an anchor rod, is then inserted into the anchor sleeve, displacing excess injection mortar onto the outer surface of the sieve sleeve. The injection mortar thus passes through the sieve of the anchor sleeve and reaches the outside of the sleeve. Load transfer into the masonry is ensured primarily by the positive locking, or sealing, between the anchor rod, the anchor sleeve, the hardened injection mortar, and the cavity of the anchoring base.Generally, the highest load-bearing capacity is expected with a compact seal. This means that the injection mortar forced through the anchor sleeve flows back together on the outside of the anchor sleeve. To achieve this, the consistency of the injection mortar must be matched to the size of the openings and the widths between them in the anchor sleeve to prevent the mortar from forming what is known as "spaghetti." In such a case, the individual strands of mortar, or "spaghetti," can easily shear off under load. This is called the "zipper effect," which leads to reduced load-bearing capacity. A standard plastic sieve sleeve with a total length of L=85 mm and a nominal outer diameter of d=16 mm is typically used in combination with M8 and M10 anchor rods. These anchor rods are essentially standard threaded rods.An M12 anchor rod can theoretically be used in the same sieve sleeve; however, insufficient bonding between the anchor rod and sieve sleeve is sometimes observed. This is particularly true for the upper area at the drill hole end. Generally, this observation can be attributed to the very small annular gap or the small amount of mortar remaining between the anchor rod and sieve sleeve after insertion. The remaining mortar settles in the thread flanks of the anchor rod, and due to the cohesion of the mortar and the small openings of the sieve sleeve, any missing mortar cannot seep back into the sieve sleeve from the outside. Due to the different diameters and volumes of the anchor rods, different amounts of mortar are displaced outwards during insertion, i.e., radially through the sieve sleeve. With the same amount of injected mortar, this results in varying sizes and volumes.pronounced interlocking joints.

[0003] German patent application DE 32 25 051 A1 discloses an anchor sleeve for an injection system for securing an anchor element in an opening in a borehole in masonry. The anchor sleeve has an inner part made of perforated plastic and an outer part made of flexible, non-permeable material. By introducing a curable compound into the inner part, the flexible casing is pushed radially outwards and can thus anchor itself in the masonry, for example in a hollow brick.

[0004] From the international patent application WO 2008 / 155617 A1, an anchor sleeve for an injection system for securing an anchor element in an opening in an object is known. The anchor sleeve consists at least partially of flexible, permeable foam, and the anchor sleeve has a tube-like element made of the foam. A support with an end piece and an inlet flange is provided, with the foam attached to the support. The end piece and the inlet flange are connected by at least one connecting strip. After a curable compound is introduced into the anchor sleeve, the curable compound is forced outwards and into the foam. When the anchor sleeve is anchored in a hollow brick, the foam is pressed between the individual ribs of the hollow brick. Once the curable compound has cured, the anchor sleeve is then anchored in the hollow brick.

[0005] Further anchor sleeves for injection systems are known from the German patent application DE 33 12 952 A1 and from the European patent application EP 0 833 065 A1.

[0006] The invention aims to improve an anchor sleeve for an injection system, an arrangement with an anchor element and an anchor sleeve, and a method for fastening an anchor element in an opening of an object by means of an anchor sleeve.

[0007] According to the invention, an anchor sleeve for an injection system with the features of claim 1, an arrangement with the features of claim 9, an arrangement with the features of claim 10, and a method with the features of claim 13 are provided. Advantageous embodiments of the invention are set forth in the dependent claims.

[0008] An anchor sleeve for an injection system for fixing an anchor element in an opening in an object, in particular in a borehole in a masonry, is designed according to the invention such that the anchor sleeve consists at least partially of flexible, permeable foam with an open pore structure.

[0009] Surprisingly, the use of flexible, permeable, open-pore foam in an anchor sleeve offers significant advantages when fixing an anchor element using an anchor sleeve and injection mortar. The use of flexible foam allows for the insertion of oversized anchor sleeves into openings or boreholes in hollow bricks. The flexible, elastic, or resilient material—the foam—can be forced through a smaller-diameter opening and adapts to the contour of the anchoring base through expansion due to its so-called memory or springback. This allows the anchor sleeve itself, or the foam itself, to become part of the positive locking mechanism of the anchor. For example, when drilling a hole in a hollow brick.An anchor sleeve whose foam element has a larger diameter than the borehole can be forced through the opening because the foam is compressible, and the foam then expands again behind the opening. Conventional sieve sleeves cannot achieve this, so that in conventional sleeves the cylindrical shell of the injection-molded plastic parts forms a shear surface. With conventional sieve sleeves, the positive fit must be ensured by the amount of mortar that emerges. With the anchor sleeve according to the invention, the formation of a clear positive fit is thus significantly facilitated, thereby increasing system reliability and load-bearing capacity.

[0010] The structure of the foam is comparable to the random layers of a non-woven fabric. This creates a permeability that does not follow a straight channel pattern of symmetrically arranged openings, holes, or ridges. The formation of mortar strands, and thus the so-called spaghetti effect, is thereby reduced to a minimum. Instead, it promotes air-inclusion-free, homogeneous, and compact seal formation of the injection mortar. Due to the suppressed spaghetti formation and the large surface area of ​​the foam, the adhesion of the injection mortar or the anchor sleeve is increased, and injection mortar systems with different viscosities or compositions, especially with different filler concentrations, can be used. Any spaghetti formation observed on the foam surface only slightly affects the load-bearing capacity of the mortar seal, as it is primarily the filled or...The foam soaked in mortar acts as a form-fit.

[0011] The large surface area of ​​the foam increases the adhesion of the injection mortar to and within the foam and reduces dripping of the mortar from the foam sleeve, for example in chambers of a hollow brick.

[0012] Due to the flexible foam, the inner diameter of the anchor sleeve can accommodate anchor rods of varying diameters and hold them centrally in the borehole. This is because the foam itself yields on the inside of the anchor sleeve and accommodates the anchor rod. With an anchor sleeve according to the invention having a nominal diameter of d = 16 mm, the range of usable anchor rods can thus be extended to include the M12 diameter, allowing the use of M8, M10, and M12 anchor rods. This is because there is no annular gap between the anchor rod and the foam of the anchor sleeve. The inner diameter of the anchor sleeve is always less than or equal to the anchor rod diameter, and due to the flexible and compressible foam, the surface of the anchor rod is always in contact with the mortar-impregnated foam.This also applies if the anchor rod is moved within the still uncured foam, which is saturated with injection mortar, after being inserted into the anchor sleeve. This significantly increases application safety.

[0013] For example, an open-cell filter foam based on polypropylene (PP), polyamide (PA), polyethylene (PET), or similar materials can be used. Such filter foam is used, for instance, as a water filter in aquariums and has irregularly distributed pores of varying sizes.

[0014] In a further development of the invention, the anchor sleeve has a tube-like element made of foam.

[0015] This ensures that a holding section of the anchor element is completely surrounded by the foam, resulting in a very good positive fit between the anchor element and the foam. The tube-like element can have two open ends.

[0016] In a further development of the invention, the tube-like element made of foam forms a blind hole.

[0017] This method allows for very simple filling of the anchor sleeve with injection mortar, as a blind hole ensures that the end of the tubular element located in the borehole offers no less flow resistance than the circumferential wall of the tubular element. This also facilitates the fastening of the foam tubular element to a support.

[0018] In a further development of the invention, the number of pores in the foam is between 15 PPI (pores per inch) and 25 PPI, in particular 20 PPI.

[0019] Such a number of pores in the open-cell foam has proven to be extremely advantageous for use in an anchor sleeve for an injection system.

[0020] According to the invention, a carrier with an end piece and an inlet flange is provided, wherein the foam is attached to the carrier.

[0021] A carrier with an end piece and an entry flange allows for secure attachment of the flexible foam and ensures that the anchor sleeve can be inserted into an opening without damage.

[0022] According to the invention, the end piece and the inlet flange are connected by means of at least one connecting strip.

[0023] Such a connecting strip stabilizes the anchor sleeve; in particular, a tube-like element made of foam is stabilized.

[0024] According to the invention, at least one connecting strip is provided with anchoring elements, in particular saw teeth and / or hooks, for gripping the foam.

[0025] This ensures that when the anchor sleeve is inserted into an opening, the foam does not shift excessively relative to the support, but rather that the foam can be inserted to the intended depth within the opening. Anchoring elements on the connecting strip ensure reliable function of the anchor sleeve without requiring additional adhesive or other bonding between the foam and the support.

[0026] In a further development of the invention, the saw teeth and / or hooks extend away from the connecting strip in the circumferential direction of the tube-like element made of foam.

[0027] It has been found that such an arrangement of the saw teeth and / or hooks ensures a secure hold of the foam on the carrier when inserting the anchor sleeve into an opening.

[0028] In a further development of the invention, the saw teeth are partly aligned in a direction towards the end piece and partly in a direction away from the end piece.

[0029] In this way, it can be ensured that the anchor sleeve can be pulled out of the opening again to a certain extent if necessary, without the position of the foam relative to the support changing significantly, i.e., without the foam collapsing.

[0030] In a further development of the invention, the tube-like element made of foam is provided with at least one longitudinally extending groove and the connecting strip is arranged in the groove.

[0031] This ensures that the foam is securely attached to the support. For example, the tube-like foam element has two opposing grooves, and a connecting strip of the support is positioned in each groove.

[0032] In a further development of the invention, the groove extends from an outside of the tube-like element to the inside.

[0033] This allows for secure fastening and easy assembly of the support and the tube-like element made of foam.

[0034] In a further development of the invention, a carrier with an end piece and an inlet flange is provided, wherein the foam is connected to the end piece and / or to the inlet flange, in particular clamped to the end piece and to the inlet flange.

[0035] The flexible foam is securely attached by the connection with the end piece and / or the inlet flange, so that the anchor sleeve according to the invention can be inserted into an opening without any risk of the foam shifting relative to the support.

[0036] In a further development of the invention, the end piece is provided with a through-opening and the foam is clamped to the end piece by means of a clamping rivet which is inserted into the through-opening.

[0037] This method ensures a reliable connection between the foam and the substrate. If the foam is in the form of a tube-like element with a blind hole, the clamping rivet can be pushed through the foam to create a particularly secure fastening. Alternatively, in the case of a tube-like element with two open ends, the clamping rivet can push the foam radially outwards, clamping it firmly to the end piece and sealing it in place.

[0038] In a further development of the invention, the at least one connecting strip is provided with a retaining shell at its end opposite the end piece, and the input flange is formed by means of an input socket, wherein the foam is clamped between the retaining shell and the input socket.

[0039] This method also allows the foam to be reliably secured to the carrier, as the foam can be clamped against the input jack across the entire surface of the retaining shell. For example, the carrier has two connecting strips and thus two retaining shells, both of which are pressed against the input jack, clamping the foam between each retaining shell and the input jack.

[0040] In a further development of the invention, the end piece is provided on its side facing the inlet flange with a frustoconical guide section which tapers away from the inlet flange.

[0041] In this way, the anchor sleeve can be guided into an opening during insertion, thus facilitating the process. The side facing the inlet flange can serve as a guide for the end piece of an injection mortar syringe and also as a guide for an anchor element, ensuring that the anchor element is centered on the anchor sleeve.

[0042] In an arrangement with an anchor element and an anchor sleeve according to the invention, the anchor sleeve has a tube-like element made of foam and the anchor element has an anchoring section designed for insertion into the tube-like element, wherein an inner diameter of the tube-like element is at least partially smaller than or equal to the outer diameter of the anchor element in the anchoring section.

[0043] This ensures that the outer circumference of the anchor element rests against the inner surface of the foam tube within the anchoring section. This creates a particularly secure connection between the anchor sleeve and the anchor element in the anchoring section. The smaller or equal inner diameter of the foam tube compared to the outer diameter of the anchor element also ensures reliable guidance and centering of the anchor element during insertion into the foam tube.

[0044] In a further development of the invention, the outer diameter of the tubular element is at least partially larger than the inner diameter of an opening provided for inserting the anchor sleeve.

[0045] In this way, the tube-like foam element can expand radially after being inserted into an opening, for example in a hollow brick. After the foam is filled with injection mortar, this ensures a uniform seal and thus a reliable positive fit of the anchor sleeve.

[0046] In a further development of the invention, the anchor element is inserted into the anchor sleeve to such an extent that one end of the anchor element rests against an inner side of an end piece of the anchor sleeve.

[0047] In a further arrangement with an anchor sleeve according to the invention, the anchor sleeve has a tube-like element made of foam, and an anchor element, an opening in an object, in particular a borehole in a building wall, and injection mortar are provided, wherein the anchor sleeve is inserted at least partially into the opening, wherein the injection mortar has at least partially filled the pores of the foam, wherein the anchor element is inserted into the anchor sleeve in sections, wherein the foam is displaced radially outwards at least partially compared to an initial position before the injection mortar is poured into the anchor sleeve and before the anchor element is inserted into the anchor sleeve, and wherein the anchor element bears against an inner surface of the tube-like element made of foam at least partially, the pores of which are at least partially filled with the injection mortar.

[0048] In such an arrangement, the positive fit between the anchor sleeve and the object is improved by the foam being displaced radially outwards, at least in sections. The connection between the anchor element and the anchor sleeve is improved by the fact that the anchor element rests, at least in sections, against an inner surface of the tubular element made of foam.

[0049] In a further development of the invention, a section of the tube-like element made of foam, the pores of which are at least partially filled with the injection mortar, forms a torus-shaped structure immediately behind an entrance rib of the borehole, the outer diameter of which is larger than the inner diameter of the opening.

[0050] This so-called donut formation allows for a reliable positive fit between the anchor sleeve and the object and can be observed when the anchor sleeve is used in hollow bricks or generally with cavities behind an entrance wall. The formation of a torus-shaped structure can be encouraged by injecting the injection mortar starting at or just behind the open end of the anchor sleeve.

[0051] In a further development of the invention, a section of the tubular element made of foam, the pores of which are at least partially filled with the injection mortar, forms a cylindrical or torus-shaped structure between the opening and a further opening in an inner web of the object, the outer diameter of which is larger than the inner diameter of the opening.

[0052] Such a cylindrical seal formation ensures a reliable positive fit between the anchor sleeve and the object. This cylindrical seal formation can be promoted by injecting the injection mortar into the anchor sleeve, starting from the bottom of the sleeve.

[0053] In a method for fastening an anchor element in an opening of an object by means of an anchor sleeve according to the invention, the anchor sleeve is inserted at least section by section into the opening, injection mortar is poured into the anchor sleeve and the anchor element is inserted section by section into the anchor sleeve.

[0054] In a further development of the invention, the anchor sleeve is placed on an injection mortar syringe, in particular until a free end of the injection mortar syringe abuts an end piece of the anchor sleeve, and the anchor sleeve is inserted into the opening together with the injection mortar syringe.

[0055] In this way, the anchor sleeve can be reliably inserted into the opening without deformation, as it is stabilized by the injection mortar syringe during insertion. Immediately following insertion, the injection mortar can then be poured into the anchor sleeve, starting from the bottom. The open end of the injection mortar syringe then rests against the bottom of the anchor sleeve, thus ensuring a reliable process of filling the injection mortar, particularly with regard to completely filling the anchor sleeve.

[0056] The injection mortar can also be poured into the anchor sleeve starting at the open end or just behind the open end of the anchor sleeve, in particular starting in the first third of the length of the anchor sleeve.

[0057] The foam prevents the injection mortar from flowing rapidly out of the anchor sleeve. Even when the injection mortar is poured in, starting at the open end of the anchor sleeve, this reliably ensures that the mortar fills the pores of the foam, at least partially. For example, in such a case, a torus-shaped structure forms directly behind an entrance rib of the opening, with an outer diameter larger than the inner diameter of the opening, thus achieving a reliable positive fit between the anchor sleeve and the object. In principle, the injection mortar can therefore be poured in at any point along the length of the anchor sleeve's interior.A form-fit achieved using the foam and the injection mortar can thus be adapted to the geometry of an object, for example the position of the webs in a hollow brick, and the required amount of injection mortar can be reduced.

[0058] Further features and advantages of the invention will become apparent from the claims and the following description of a preferred embodiment of the invention in conjunction with the drawings. The drawings show: Fig. 1 shows an anchor sleeve according to the invention in a view from an oblique angle above, Fig. 2 shows a side view of the anchor sleeve. Fig. 1 , Fig. 3 a view of the section plane III-III in Fig. 2 , Fig. 4 a side view of a support of the anchor sleeve of the Fig. 1 , Fig. 5 another side view of the anchor sleeve of the Fig. 1 , wherein the anchor sleeve in Fig. 5 compared to the presentation of Fig. 2 rotated 90° around the central longitudinal axis, Fig. 6 shows another representation of the support of the anchor sleeve of the Fig. 4 , wherein the carrier is opposite the representation of the Fig. 4 rotated 90° around the central longitudinal axis, Fig. 7 a top view of the anchor sleeve of the Fig. 1 , Fig. 8 a view of the anchor sleeve of the Fig. 1 from below, Fig. 9 the support of the Fig. 4 in the extended state, Fig. 10 the support of the Fig. 9 in a contrast to the representation of Fig. 9 View rotated by 90°, Fig. 11 shows a tubular element made of foam before insertion into the support of the anchor sleeve. Fig. 1 , Fig. 12 a schematic representation of the contour of the tubular element of the Fig. 11 To illustrate the geometry of the tubular element, Fig. 13 shows a side view of the tubular element. Fig. 11 und Fig. 12 , Fig. 14 a view of the section plane XIV-XIV in Fig. 13 , Fig. 15 another side view of the tubular element of the Fig. 13 , wherein the tubular element in Fig. 15 compared to the presentation of Fig. 13 rotated 90° about its central longitudinal axis, Fig. 16 a view of the section plane XVI-XVI in Fig. 15 , Fig. 17 a top view of the tubular element of the Fig. 11 und 12 and Fig. 18 a view of the tubular element of the Fig. 11 und 12 from underneath.

[0059] Fig. 1 Figure 1 shows an anchor sleeve 10 according to the invention, which has a support 12 made of plastic. The support 12 consists of a durable plastic, for example polyurethane or polypropylene, which is mechanically resilient and only very slightly flexible. In other words, the support 12 consists of a plastic such as that used, for example, for plastic anchors.

[0060] The anchor sleeve 10 also features a tube-like element 14 made of a coarse-pored, open-cell or open-pore foam. The foam is, for example, a filter foam based on polypropylene (PP), polyamide (PA), polyethylene (PET), or similar materials, such as those used as filter media in aquariums. An open-cell or open-pore polyether foam can also be used. In all cases, the porosity of the foam is between 15 pores per inch (PPI) and 25 PPI, and is specifically 20 PPI.

[0061] The tubular element 14 is clamped to the support 12. According to the invention, the tubular element can also be glued, welded, or otherwise connected to the support by frictional or material bonding.

[0062] The carrier 12 has an input socket 16, which forms an annular input flange. The carrier 12 further has two connecting strips 18, of which in Fig. 1 only one is recognizable. The one in Fig. 1 A visible connecting strip 18 connects a half-shell 20 to an end piece 22, which is located on the outside and on the inside Fig. 1 The non-visible inner surface is frustoconical. The end piece 22, the two connecting strips 18, and the two half-shells 20 are made from a single piece of plastic. The input socket 16 is also made from a single piece of plastic.

[0063] The tubular element 14 has two grooves 24 extending from the outside to the inside parallel to its central longitudinal axis, wherein in Fig. 1 Only one of the grooves is visible. Each of the grooves 24 accommodates a connecting strip 18.

[0064] The half-shells 20 each have a groove or notch 26, see Fig. 2 This notch 26 serves to insert a wire, which then pre-tensions the two half-shells 20 against a cylindrical section of the input socket 16. A section of the tubular element 14 is clamped between the half-shells 20 and an outer wall of the cylindrical section of the input socket 16, as will be explained below. A wire arranged in the notch 26 is tied to clamp the tubular element 14 made of foam by pre-tensioning the half-shells 20 inwards against the input socket 14. Of course, within the scope of the invention, other connections between the two half-shells 20 are possible, for example, by means of a spring washer, an annular collar on the input socket 16, or by gluing or welding.

[0065] Fig. 2 The frustoconical end piece 22 can be seen, which, as explained, is formed in one piece with the two connecting strips 18 and the two half-shells 20, with the two connecting strips 18 being shown in the view of the Fig. 2 are not recognizable, but see Fig. 4 .

[0066] Fig. 5 shows a side view of the Fig. 2 Side view of the anchor sleeve 10 rotated by 90°. In this view, one of the connecting strips 18 and one of the half shells 20 can be seen. Fig. 5 This also shows that the connecting strip 18 is received in the groove 24 of the tubular element 14 made of foam.

[0067] Fig. 2 and Fig. 5 Sections reveal a clamping rivet 28, which is pressed from the inside through an opening in the end piece 22, snaps into place there and thus also clamps the tubular element 14 made of foam to the end piece 22.

[0068] Fig. 3 shows a sectional view of section plane III-III in Fig. 2 In this sectional view of the Fig. 3 The connecting strips 18 are not visible because they are arranged perpendicular to the cutting plane III-III. Fig. 3 The figure initially shows the design of the input socket 16 with an annular input flange 30 and a cylindrical section 32. The cylindrical section 32 is, cf. Fig. 4 und Fig. 6 , at its lower end provided with outwardly extending locking lugs 34. This is also well suited in Fig. 9 und Fig. 10 to recognize.

[0069] Fig. 3 This shows that a section of the tubular element 14 made of foam, adjacent to the inlet flange 30, is compressed between the two half-shells 20 and clamped against the cylindrical section 32 of the inlet bushing 16. The tubular element 14 is thus reliably clamped to the half-shells 20 and the inlet bushing 16, since, as explained, the half-shells 20 are pre-tensioned radially inwards, for example by a circumferential and tightly wound wire.

[0070] The tubular element 14 is furthermore clamped to the end piece 22 by means of the clamping rivet 28. For this purpose, the clamping rivet 28 is pushed through a blind hole 36 in the tubular element 14 to the bottom of the blind hole, then pressed through the bottom of the blind hole until it engages in the opening of the end piece 22, as shown in Fig. 3 As shown, the tubular element 14 is made of a coarse-pored, open-cell foam that is very flexible, allowing the clamping rivet 28 to be pushed through the bottom of the blind hole in the tubular element 14 and then snapped and anchored in the opening in the end piece 22. The clamping rivet 28 thus reliably clamps the tubular foam element 14 to the end piece 22.

[0071] The Fig. 11 bis 18 The figures show the tubular element 14 made of foam before it is inserted into the carrier 12. The sectional views in Fig. 14 und Fig. 16 The formation of the tubular element 14 with the central blind hole 36 is clearly visible. Fig. 16 The cutting plane runs through the two grooves 18, which extend inwards from the outer surface of the tubular element 14 and which, as explained, are designed to receive a connecting strip 18 of the support 12.

[0072] In Fig. 11 An attempt was made to depict the coarse-pored, open-cell structure of the tubular element 14 made of foam.

[0073] Fig. 17 Figure 1 shows a top view of the tubular element 14. The blind hole 36 and the two grooves 24 are visible. Fig. 18 Figure 1 shows a view of the tubular element 14 from below. The blind hole 36 is not visible in this view, only the two grooves 24.

[0074] Fig. 7 shows a view of the anchor sleeve 12 of the Fig. 1 From above. In this view, the eye is drawn into the blind hole 36 and the clamping rivet 28 can be seen at the bottom of the blind hole, cf. Fig. 3 .

[0075] Fig. 8 Figure 1 shows a view of the anchor sleeve 10 from below. The connecting strips 18 extend from the end piece 22 and are arranged in the grooves 24 of the tubular element 14. A clamping section of the clamping rivet 28, pressed through the central opening of the end piece 22, is also visible.

[0076] The following procedure can be used to assemble the support 12 and the tubular element 14 into the anchor sleeve 10. Reference is made to the Fig. 11 bis 18 , which show the tubular element 14 made of foam before assembly with the support 12, as well as on the Fig. 9 und 10 , which show carrier 12 before assembly. In Fig. 9 The clamping rivet 28 is shown in Fig. 10 For the sake of clarity, the clamping rivet 28 has been omitted. As already explained, the assembled anchor sleeve is in the Fig. 1 bis 3 as well as 7 and 8.

[0077] To mount the tubular element 14 to the support 12, the tubular element 14 is first inserted between the two connecting strips 18 until the end of the tubular element 14 with a closed bottom, see Fig. 18 , on the inside of the frustoconical end piece 22. For this purpose, the two connecting strips 18 can be bent outwards a short distance in order to insert the tubular element 14 between the two connecting strips so that the two connecting strips 18 are arranged in the grooves 24 of the tubular element 14, see for example Fig. 1 and Fig. 5 The two hemispheres 20 then rest on an outer side of the tubular element 14.

[0078] Fig. 9 und Fig. 10 The figures show that both connecting strips 18 are provided with saw teeth 40. These saw teeth 40 engage in the foam material of the tubular element 14 and secure the tubular element 14 against displacement parallel to a central longitudinal axis of the anchor sleeve 10, cf. Fig. 1 The saw teeth 40 of the two connecting strips 18 extend in the circumferential direction of the tubular element 14, so that the saw teeth 40 engage in the side walls of the grooves 24 in the tubular element 24.

[0079] Fig. 10 This shows that on both sides of the connecting strips 18 saw teeth 40 are arranged over almost the entire length of the connecting strip 18. On one side, in Fig. 10 On the left, the steep flank of the saw teeth 40 faces the end piece 22; on the opposite side, in Fig. 10 On the right, the steep flank of the saw teeth faces the half-shell 20. The saw teeth 40 thus prevent the tubular element 14 from shifting relative to the support 12 towards the end piece 22 as well as in the opposite direction, i.e., towards the half-shell 20.

[0080] After inserting the tubular element 14 between the two connecting strips 18, the clamping rivet 28 is inserted into the blind hole 36 of the tubular element 14, see also Fig. 3 , and then pressed through the bottom of the blind hole into the central opening of the end piece 22. The clamping rivet is guided here by means of a suitable rod-shaped tool which is inserted into a Fig. 3 The visible blind hole in the clamping rivet 28 engages. The clamping rivet 28 is moved towards the end piece 22 until locking lugs on the end piece 22 engage. Fig. 9 and Fig. 3 Snap the lower end of the clamping rivet 28 over a limiting edge of the central opening in the end piece 22. The base of the tubular foam element 14 is thereby strongly compressed and simultaneously clamped to the end piece 22.

[0081] The input socket 16 is then pressed or inserted into the blind hole 36 of the tubular element 14 until an upper surface of the tubular element 14 abuts an underside of the annular flange 30 of the input socket 16. The half-shells 20 then also abut an underside of the annular flange 30 or are positioned at a very small distance from the underside of the annular flange 30. Subsequently, as already discussed, the two half-shells 20 are pressed inwards and fixed in this inwardly pressed position, for example by means of a wire or spring washer surrounding the two half-shells 20. The locking lugs 34 on the input socket 16 are then located, see Fig. 4 und Fig. 6 , below an edge of the half-shells 20 that faces the end piece 22. The inlet bushing is thus fixed to the half-shells 20, and the tubular element 14 also lies between an outer wall of the cylindrical section 32 of the inlet bushing 16 and the respective inner walls of the half-shells 20, and is therefore securely clamped to the support 12. This results in the Fig. 1, 2, 3 and 5 recognizable shape of the tubular element 14, which is strongly compressed and clamped in the area of ​​the end piece 22 and in the area of ​​the input socket 16.

[0082] To attach an anchor element to an opening of an object using the anchor sleeve 10, the anchor sleeve 10 is used, see Fig. 19 , inserted into an opening in an object until an underside of the ring flange 30 of the input socket 16 rests against a surface of the object. The opening is, in the case of the Fig. 19 executed as a borehole in a hollow brick. Fig. 19 This shows that the inner diameter of a bore 50 in the hollow brick is smaller than the outer diameter of the tubular element 14 of the anchor sleeve 10. The tubular element 14 is thus compressed in the area of ​​the webs 52, 54 of the hollow brick, but outside the webs 52, 54, the tubular element 14 attempts to return to its original shape and is therefore convex and thus has a larger outer diameter between or next to the webs 52, 54 than the diameter of the bore 50 in the webs 52, 54. In order to be able to insert the anchor sleeve 10 into the opening 50 at all, an injection mortar syringe 56, which is Fig. 19 The injection mortar syringe 56, which is shown only schematically and in sections, is pushed to the bottom of the blind hole in the tubular element 14, until the free end of the syringe abuts the inside of the end piece 22. The anchor sleeve 10 can thus be easily pushed or inserted into the opening, even if it extends through several webs or has a bore wall with broken-out sections, until the Fig. 19 The depicted position has been reached.

[0083] Starting from the in Fig. 19 In the depicted situation, injection mortar is introduced into the blind hole of the tubular element 14 using the injection mortar syringe 56. This is done in several strokes, typically six strokes, with the injection mortar syringe 56 being withdrawn a short distance from the blind hole of the tubular element 14 after each stroke. This is referred to as filling the anchor sleeve 10 from the bottom up.

[0084] Alternatively, after inserting the anchor sleeve 10, starting from the in Fig. 19 In the situation shown, the injection mortar syringe can be withdrawn and the injection mortar can be poured from the beginning of the blind hole, i.e., at the level of web 52.

[0085] Even when filling the blind hole 36 of the tubular element 14 with injection mortar, the injection mortar penetrates the open pores of the tubular element 14 made of foam and fills them at least partially. It is already in Fig. 19 It can be seen that simply filling the foam with the injection mortar creates a so-called seal. It is sufficient to fill only the pores of the tubular element 14 with injection mortar. This is because the tubular element 14 is already bulged outwards between the webs 52 and 54, and next to the web 54, thus forming a positive fit with the webs 52 and 54. Once the injection mortar has hardened, this positive fit prevents the anchor sleeve 10, with an anchor element arranged within it, from being pulled out of the object or the opening 50.

[0086] However, the injection mortar usually emerges from the outside of the tubular element 14 at the latest when an anchor element is inserted into the anchor sleeve 10, thereby improving a positive fit as well as a material bond with the object, in the case shown, i.e., with the webs 52, 54 of a hollow brick.

[0087] Based on the state of the Fig. 19 As described, the anchor sleeve is filled with injection mortar, the injection mortar syringe 56 is withdrawn from the anchor sleeve 10 and an anchor element, typically an anchor rod 58, is inserted. Fig. 20 , is inserted into the anchor sleeve 10 before the injection mortar has hardened.

[0088] Radically hardening injection mortar or, for example, an epoxy resin can be used as the injection mortar. Crucially, the injection mortar must be pasty or viscous in its uncured state so that it can penetrate the pores of the tubular foam element 14 and be displaced from the blind hole 36 of the tubular element 14 when the anchor rod 58 is inserted. Fig. 20 Figure 1 shows a schematic sectional view of the anchor sleeve 10. It can be seen that the anchor rod 58 has been inserted into the anchor sleeve 10 up to the inner side of the end piece 22. The end piece 22 provides a reliable stop. It can also be seen that the outer diameter of the anchor rod 58 is greater than or equal to the inner diameter of the blind hole 36. This ensures that the outer circumference of the anchor rod 58 rests against the inner circumference of the blind hole 36 of the tubular element 14 made of foam. Consequently, to form a material and form-fit connection with the injection mortar, the injection mortar does not need to flow back, but is automatically pressed into contact with the outer circumference of the anchor rod 58 by the flexibility and elasticity of the foam of the tubular element 14.

[0089] In Fig. 20 The diagram schematically illustrates how the injection mortar 60 emerges from the outer circumference of the tubular element 14. An attempt has been made to demonstrate that the injection mortar emerges in unaligned strands or strands. This is because the pores in the tubular element 14 are not regularly arranged. Consequently, the individual strands of injection mortar 60 emerging from the tubular element 14 interlock with one another. The so-called spaghetti effect in conventional sieve sleeves, where the strands lie neatly next to each other and do not interlock, cannot occur in the anchor sleeve 10 according to the invention. Instead, the emerging strands of injection mortar 60 wedge and interlock, thereby reinforcing the positive fit of the anchor sleeve 10 to the webs 52, 54 of the hollow brick.

[0090] The in the Fig. 19 und 20The illustrated arrangement with an anchor element, i.e. the anchor rod 58 and the anchor sleeve 10 according to the invention, as well as the opening 50 in an object, namely a hollow brick, consequently ensures high anchoring forces and a secure positive connection between the anchor sleeve 10 and the injection mortar 60, as well as between the anchor rod 58 and the object, i.e. the hollow brick.

[0091] A further positive connection between the anchor sleeve 10 and the webs 52, 54 naturally also occurs in the area of ​​the webs 52, 54. Unevenness in the inner wall of the opening 50 is filled with injection mortar. In addition, a material bond can also be achieved in the area of ​​the webs 52, 54 between the material of the webs 52, 54 and the injection mortar 60.

Claims

1. Anchor sleeve (10) for an injection system for securing an anchor element in an opening (50) in an article, especially in a bore hole in masonry, where the anchor sleeve (10) consists at least in sections of flexible permeable open-cell foam, characterized in that a carrier (12) with an end piece (22) and an entry flange (30) is provided, wherein the foam is secured to the carrier (12), in that the end piece (22) and the entry flange (30) are joined by means of at least one connecting strip (18), and in that the at least one connecting strip (18) is provided with anchoring elements, especially sawteeth (40) and / or hooks, for engaging with the foam.

2. Anchor sleeve according to Claim 1, characterized in that the anchor sleeve (10) has a tubular element (14) made of the foam, wherein the tube-like element (14) made of foam in particular forms a blind hole.

3. Anchor sleeve according to Claim 1 or 2, characterized in that the sawteeth (40) and / or hooks extend away from the connecting strip (18) in circumferential direction of the tube-like element (14) made of foam, and / or in that the sawteeth (40) are aligned partly in a direction toward the end piece (22) and partly in a direction away from the end piece (22).

4. Anchor sleeve (10) according to at least one of Claims 1 to 3, characterized in that the tube-like element (14) made of foam is provided with at least one groove (24) that runs in longitudinal direction and in that the connecting strip (18) is disposed in the groove (24).

5. Anchor sleeve (10) according to Claim 4, characterized in that the groove (24) extends from an outer face of the tube-like element inward.

6. Anchor sleeve (10) according to at least one of the preceding claims, characterized in that a carrier (12) with an end piece (22) and an entry flange (30) is provided, wherein the foam is connected to the end piece (22) and / or to the entry flange (30), especially is clamped to the end piece (22) and to the entry flange (30), wherein the end piece (22) is in particular provided with a passage opening and the foam is clamped to the end piece (22) by means of a clamping rivet (28) inserted into the passage opening.

7. Anchor sleeve according to Claim 6, characterized in that the at least one connecting strip, at its end opposite the end piece (22), is provided with a holding shell, and in that the entry flange (30) is formed by means of an entry bushing (16), where the foam is clamped between the holding shell (20) and the entry bushing (16).

8. Anchor sleeve according to Claim 6 or 7, characterized in that the end piece (22), on its side facing the entry flange (30), has been provided with a frustoconical guide section that tapers in the direction away from the entry flange (30).

9. Arrangement having an anchor element and an anchor sleeve (10) according to at least one of the preceding claims, characterized in that the anchor sleeve (10) has a tube-like element made of the foam and in that the anchor element has an anchoring section designed for insertion into the tube-like element (14), wherein an internal diameter of the tube-like element (14), at least in sections, is less than or equal to the external diameter of the anchor element in the anchoring section, wherein an external diameter of the tube-like element (14), at least in sections, is in particular greater than the internal diameter of an opening (50) intended for introduction of the anchor sleeve (10), and wherein the anchor element has in particular been inserted into the anchor sleeve (10) to such an extent that one end of the anchor element adjoins an inner face of an end piece (22) of the anchor sleeve (10).

10. Arrangement having an anchor sleeve according to at least one of Claims 1 to 8, wherein the anchor sleeve (10) has a tube-like element (14) made of foam, having an anchor element, having an opening (50) in an article, especially a bore hole in a building wall, and having injection mortar, characterized in that the anchor sleeve (10) has been inserted at least in sections into the opening (50), in that the injection mortar has at least partly filled the pores in the foam, in that the anchor element has been inserted in sections into the anchor sleeve (10), in that the foam has been displaced radially outward at least in sections with respect to a starting position prior to the introduction of injection mortar into the anchor sleeve (10) and prior to insertion of the anchor element into the anchor sleeve (10), and in that the anchor element at least in sections adjoins an inner face of the tube-like element (14), the pores of which have been at least partly filled with the injection mortar.

11. Arrangement according to Claim 10, characterized in that a section of the tube-like element (14) made of foam, the pores of which have been at least partly filled with the injection mortar, immediately beyond an entry element (52) of the opening (50), forms a toroidal structure, the external diameter of which is greater than the internal diameter of the opening (50).

12. Arrangement according to Claim 10, characterized in that a section of the tube-like element (14) made of foam, the pores of which have been at least partly filled with the injection mortar, between the opening (50) and a further opening in an inner element (54) of the article, forms a cylindrical or toroidal structure, the external diameter of which is greater than the internal diameter of the opening (50).

13. Method of securing an anchor element in an opening (50) of an article by means of an anchor sleeve according to at least one of Claims 1 to 8, characterized by insertion of at least sections of the anchor sleeve (10) into the opening (50), introduction of injection mortar into the anchor sleeve (10) and insertion of sections of the anchor element into the anchor sleeve (10), in particular characterized by placing of the anchor sleeve (10) onto an injection mortar injector (56), especially until a free end of the injection mortar injector (56) hits an end piece (22) of the anchor sleeve (10), and inserting the anchor sleeve (10) into the opening together with the injection mortar injector.

14. Method according to Claim 13, characterized by insertion of the injection mortar into the anchor sleeve (10) beginning from the base of the anchor sleeve (10), or characterized by insertion of the injection mortar into the anchor sleeve (10) beginning at the open end or just beyond the open end of the anchor sleeve (10), especially beginning in a first third of the length of the anchor sleeve (10).