Anchor sleeve, assembly and method for securing

Abstract

The invention relates to an anchor sleeve for an injection system for fastening an anchor element in an opening in an object, in particular in a borehole in a masonry, the anchor sleeve being formed at least in some sections from a flexible permeable open-cell foam.

Description

Technical Field

[0001] The invention relates to an anchor sleeve for an injection system for fixing an anchor element in an opening in an object, in particular a drilled hole in masonry. The invention also relates to an assembly having an anchor element and an anchor sleeve according to the invention. The invention also relates to a method for fixing an anchor element in an opening in an object by means of an anchor sleeve according to the invention. Background Art

[0002] Anchor sleeves for injection systems for fixing anchor elements in drilled holes are known, see for example Würth screen sleeve SH16x85, article number 090344164. An anchor sleeve, also called a screen sleeve, is provided with a screen at least in sections on its circumference. The anchor sleeve is inserted into the drilled hole and then filled with injection mortar. The anchor element, usually an anchor rod, is then inserted into the anchor sleeve and the excess injection mortar is squeezed onto the outer surface of the screen sleeve. The injection mortar thus passes through the screen of the anchor sleeve and reaches the outside of the anchor sleeve. The introduction of load into the masonry is essentially ensured by the form fit between the anchor rod, the anchor sleeve and the hardened injection mortar and the cavity of the anchor base, the so-called plombenbildung. In general, the highest load capacity is expected in a compact plombenbildung. This means that the injection mortar squeezed through the anchor sleeve converges again on the outside of the anchor sleeve. In order to achieve this, the consistency of the injected mortar must be coordinated with the size of the opening and the width of the bridge between the openings of the anchor sleeve so that no so-called spaghetti formation of the mortar occurs. In this case, the individual mortar lines or spaghetti can easily shear off under load. This is called the so-called zipper effect, which leads to a reduction in the load capacity. Standard screen sleeves made of plastic with a total length L=85 mm and an outer diameter d=16 mm are usually used in combination with anchor rods of sizes M8 and M10. Such anchor rods are basically ordinary threaded rods. In theory, anchor rods of size M12 can be used in the same screen sleeve, but in this case, inadequate bonding between anchor rod and screen sleeve is observed in some cases. This applies in particular to the upper area at the borehole opening. In general, this observation can be attributed to a very small annular gap or a small amount of mortar remaining between the anchor rod and the screen sleeve after the anchor rod is moved in. The remaining mortar settles in the threaded flanks of the anchor rod, and due to the cohesive forces of the mortar or the small openings of the screen sleeve, the missing mortar can no longer penetrate back into the screen sleeve from the outside. Due to the different diameters or volumes of the anchor rods, different amounts of mortar are pressed outwards during insertion, i.e. through the screen sleeve in the radial direction. This results in form fits of different sizes or different characteristics when the amount of mortar injected is the same. Summary of the invention

[0003] The invention is intended to improve an anchor sleeve for an injection system, an assembly comprising an anchor element and an anchor sleeve, and a method for fixing an anchor element in an opening of an object by means of an anchor sleeve.

[0004] According to the invention, there is provided an anchor sleeve for an injection system having the features of claim 1, an assembly having the features of claim 16, an assembly having the features of claim 19 and a method having the features of claim 22. Advantageous developments of the invention are derived from the dependent claims.

[0005] According to the invention, an anchor sleeve for an injection system for fixing an anchor element in an opening in an object, in particular a drilled hole, is designed such that the anchor sleeve consists at least in sections of a flexible, permeable foam with an open-pore structure.

[0006] Surprisingly, the use of a flexible, permeable foam with an open pore structure in the anchor sleeve offers significant advantages when fixing anchor elements by means of an anchor sleeve and injection mortar. The use of a flexible foam allows an oversized anchor sleeve to be brought into an opening or a drilled hole in a hollow stone. A flexible, elastic or resilient material, i.e. a foam, can be squeezed through an opening with a smaller diameter and, by expansion due to so-called memory capabilities or due to rebound, adapts to the contour of the anchor base. Thus, the anchor sleeve itself or the foam itself can also become part of the form fit of the anchor. For example, a drilled hole is implemented in a hollow stone. An anchor sleeve whose foam element has a diameter greater than the drilled hole can be squeezed through the opening by the foam being able to be squeezed together and the foam expanding again behind the opening. This cannot be achieved with conventional screen sleeves, whereby the cylindrical jacket of the plastic injection molded part forms the shear surface. In conventional screen sleeves, the form fit must be ensured by the amount of mortar present. In the anchor sleeve according to the invention, the construction of a significant form fit is thus significantly simplified, thereby increasing the system safety and load-bearing capacity.

[0007] The structure of the foam is comparable to a random layer (Wirr-Lagen, sometimes also called an unoriented layer) of a non-woven fabric. This results in a permeability of straight channel openings that do not follow a symmetrical arrangement of openings or holes and bridges. The formation of mortar lines and therefore the so-called spaghetti effect is thereby reduced to a minimum. On the contrary, the formation of air-free inclusions or a uniform and dense packing of the injection mortar is promoted. Due to the suppressed spaghetti formation and the large surface area of ​​the foam, the adhesion of the injection mortar or anchor sleeve is increased, and injection mortar systems with different viscosities or compositions, in particular different filling degrees, can be used. The spaghetti formation that may be observed on the foam surface only slightly affects the load-bearing capacity of the mortar packing, because it is mainly the foam that is filled or penetrated with mortar that acts as a form fit.

[0008] The large surface area of ​​the foam increases the attachment or adhesion of the injected mortar to and in the foam and reduces dripping of the mortar from the foam sleeve, such as in the cavity of a hollow stone.

[0009] Due to the flexible foam, the inner diameter of the anchor sleeve can accommodate anchor rod diameters of different sizes and hold them centered in the drilled hole. This is because the foam naturally also yields on the inner side of the anchor sleeve and moves away from the anchor rod. In the case of an anchor sleeve according to the invention with a nominal diameter of d=16 mm, the application range of the available anchor rods can thus be expanded with an anchor rod diameter of M12, so that anchor rods M8, M10 and M12 can therefore be used. 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 smaller than or equal to the anchor rod diameter, and due to the flexible or compressible foam, the anchor rod surface is always in contact with the foam penetrated with mortar. This also applies if the anchor rod moves in the foam that has not yet hardened and is penetrated with injection mortar after being introduced into the anchor sleeve. This significantly increases the safety of application.

[0010] For example, open-cell filter foams based on polypropylene (PP), polyamide (PA), polyethylene (PET) or the like can be used as foams. Such filter foams are used, for example, as water filters in aquariums and have irregularly distributed pores of different sizes.

[0011] In a development of the invention, the anchor sleeve has a tubular element made of foam.

[0012] In this way it can be ensured that the holding section of the anchor element is completely surrounded by the foam, so that a very good form fit between the anchor element and the foam can be achieved.The tubular element can have two open ends.

[0013] In a development of the invention, the tubular element composed of foam forms the blind hole.

[0014] In this way, the filling of the anchor sleeve with injection mortar can be realized in a very simple manner, since it can be ensured by means of the blind hole that the end of the tubular element located in the drilled hole also does not offer a lower outflow resistance than the peripheral wall of the tubular element. This also simplifies the fixing of the tubular element composed of foam on the carrier.

[0015] In a 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.

[0016] Such a number of pores in an open-cell foam has proven to be extremely advantageous for use in an anchor sleeve for an injection system.

[0017] In a development of the invention, a carrier is provided with an end piece and an inlet flange, wherein the foam is fastened to the carrier.

[0018] The carrier with the end piece and the access flange allows a secure fixing of the flexible foam and ensures that the anchor sleeve can be introduced into the opening without damage.

[0019] In a development of the invention, the end piece and the inlet flange are connected by means of at least one connecting strip.

[0020] Such a connecting strip stabilizes the anchor sleeve, in particular the tubular element made of foam.

[0021] In a development of the invention, the at least one connecting strip is provided with anchoring elements, in particular teeth and / or hooks, for engaging with the foam.

[0022] In this way, it can be ensured that when the anchor sleeve is introduced into the opening, the foam does not move excessively relative to the carrier, but that the foam can be moved into the opening to a predetermined depth. The anchoring element at the connecting strip ensures a reliable function of the anchor sleeve without requiring an additional adhesive bond or other connection between the foam and the carrier.

[0023] In a development of the invention, the teeth and / or hooks extend in the direction of the circumference of the tubular element made of foam away from the connecting strip.

[0024] It has been found that such an arrangement of teeth and / or hooks ensures that the foam is securely held on the carrier when the anchor sleeve is inserted into the opening.

[0025] In a development of the invention, the saw teeth are oriented partially in the direction toward the end piece and partially in the direction away from the end piece.

[0026] In this way it can be ensured that the anchor sleeve can also be pulled a little further out of the opening if necessary without the position of the foam relative to the carrier being significantly changed, ie the foam is not pushed together.

[0027] In a development of the invention, the tubular element made of foam is provided with at least one groove extending in the longitudinal direction, and the connecting strip is arranged in the groove.

[0028] In this way, a secure fixation of the foam to the carrier can be ensured. For example, the tubular element consisting of the foam has two oppositely disposed grooves, and a respective connecting strip of the carrier is arranged in a respective groove.

[0029] In a development of the invention, the groove extends from the outside of the tubular element inwardly.

[0030] In this way, a secure fixation and an easy assembly of the carrier and the tubular element consisting of foam are possible.

[0031] In a development of the invention, the carrier is provided with an end piece and an inlet flange, 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.

[0032] The flexible foam is securely fixed by connection to the end piece and / or the entry flange, so that the anchor sleeve according to the invention can be moved into the opening without having to fear that the foam will move relative to the carrier.

[0033] In a development of the invention, the end piece is provided with a through-opening and the foam is clamped on the end piece by means of a clamping rivet which is inserted into the through-opening.

[0034] In this way, a reliable connection between the foam and the carrier can be achieved. If the foam is in the form of a tubular element with blind holes, the clamping rivet can be pressed through the foam to thereby achieve a particularly secure fixation. For example, in the case of a tubular element with two open ends, the foam can also be pressed radially outwards by the clamping rivet and thus clamped at the end piece and in particular also sealed.

[0035] In a 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 inlet flange is formed by means of an inlet bushing, wherein the foam is clamped between the retaining shell and the inlet bushing.

[0036] In this way, the foam can also be fixed very reliably to the carrier, since the foam can be clamped against the entry bushing over the entire surface of the retaining shell. For example, the carrier has two connecting strips and thus two retaining shells, which are both pressed against the entry bushing and thereby clamp the foam between the respective retaining shell and the entry bushing.

[0037] In a development of the invention, the end piece is provided on its side facing the inlet flange with a frustoconical guide section which tapers in a direction away from the inlet flange.

[0038] In this way, the anchor sleeve can be guided when it is moved into the opening, which simplifies the movement in. The side facing the entry flange can serve as a guide for the end piece of the mortar injector and also as a guide for the anchor element in order to center the anchor element with the anchor sleeve.

[0039] In an assembly having an anchor element and an anchor sleeve according to the invention, the anchor sleeve has a tubular element made of foam, and the anchor element has an anchoring section which is configured to be inserted into the tubular element, wherein the inner diameter of the tubular element is at least partially smaller than or equal to the outer diameter of the anchor element in the anchoring section.

[0040] In this way, it is ensured that the outer circumference of the anchor element in the anchoring section lies against the inner side of the tubular element made of foam. This allows a particularly strong connection to be achieved between the anchor sleeve and the anchor element in the anchoring section. A smaller or equal inner diameter of the tubular element compared to the outer diameter of the anchor element also ensures reliable guidance and centering of the anchor element when it is introduced into the tubular element.

[0041] In a development of the invention, the outer diameter of the tubular element is at least partially greater than the inner diameter of the opening provided for the introduction of the anchor sleeve.

[0042] In this way, the tubular element consisting of foam can expand in the radial direction after being inserted into an opening in, for example, a hollow hole brick. After filling the foam with injection mortar, a uniform sealing formation is thus ensured, and thus a reliable form fit of the anchor sleeve is ensured.

[0043] In a development of the invention, the anchor element is pushed into the anchor sleeve to such an extent that one end of the anchor element bears against the inner side of the end piece of the anchor sleeve.

[0044] In another arrangement with the anchor sleeve according to the invention, the anchor sleeve has a tubular element made of foam and is provided with an anchor element, an opening in an object, in particular a drilled hole in a building wall, and injection mortar, wherein the anchor sleeve is at least partially inserted into the opening, wherein the injection mortar at least partially fills the pores of the foam, wherein the anchor element is partially inserted into the anchor sleeve, wherein the foam is at least partially pressed radially outwards relative to an initial position before the injection mortar is filled into the anchor sleeve and before the anchor element is inserted into the anchor sleeve, and wherein the anchor element rests at least partially against the inner side of the tubular element made of foam, the pores of which are at least partially filled with injection mortar.

[0045] In this arrangement, the form fit between the anchor sleeve and the object is improved by the foam being pressed radially outward at least in sections. The connection between the anchor element and the anchor sleeve is improved in that the anchor element rests at least in sections on the inside of the tubular element made of foam.

[0046] In a development of the invention, a section of a tubular element made of foam, whose bore is at least partially filled with injection mortar, forms a torus-like structure directly behind the entry bridge of the drilled hole, the outer diameter of which is greater than the inner diameter of the opening.

[0047] This so-called torus formation allows a reliable form fit between the anchor sleeve and the object and can be observed when using the anchor sleeve in hollow hole bricks or generally in cases with a cavity behind an access wall. The construction of a torus-like structure can be facilitated by injecting the injection mortar starting at or just behind the open end of the anchor sleeve.

[0048] In a refinement of the invention, a section of a tubular element made of foam forms a cylindrical or toroidal structure between an opening and another opening in the inner bridging portion of the object, the bore of the tubular element being at least partially filled with injection mortar, the outer diameter of the cylindrical or toroidal structure being greater than the inner diameter of the opening.

[0049] This cylindrical packing formation is responsible for a secure form fit between the anchor sleeve and the object.This cylindrical packing formation can be promoted by filling the injection mortar into the anchor sleeve starting from the base of the anchor sleeve.

[0050] In the method for fixing an anchor element in an opening of an object by means of an anchor sleeve according to the invention, it is provided that the anchor sleeve is at least partially inserted into the opening; injection mortar is filled into the anchor sleeve and the anchor element is partially inserted into the anchor sleeve.

[0051] In a development of the invention, provision is made for the anchor sleeve to be placed onto the mortar injection syringe, in particular until the free end of the mortar injection syringe comes into contact with the end piece of the anchor sleeve, and for the anchor sleeve to be moved together with the mortar injection syringe into the opening.

[0052] In this way, the anchor sleeve can be inserted into the opening securely and without deformation, since it is stabilized during the insertion by the injection mortar injector. Immediately following the insertion, the injection mortar can then be filled into the anchor sleeve starting from the base of the anchor sleeve. The open end of the injection mortar injector then abuts against the base of the anchor sleeve, thereby ensuring a process-reliable filling of the injection mortar, especially with regard to the complete filling of the anchor sleeve with the injection mortar.

[0053] Filling with injected mortar into the anchor sleeve can also be started at or immediately behind the open end of the anchor sleeve, in particular in the first third of the length of the anchor sleeve.

[0054] The foam prevents the injection mortar from flowing out of the anchor sleeve quickly. Even when the injection mortar is initially filled in at the open end of the anchor sleeve, it is thereby reliably achieved that the injection mortar fills the pores of the foam at least in sections. For example, in this case, a torus-like structure is formed directly behind the entry bridge of the opening, the outer diameter of which is greater than the inner diameter of the opening, and a reliable form fit between the anchor sleeve and the object is thereby achieved. In principle, the injection mortar can thus be filled in at any point over the length of the inner cavity of the anchor sleeve. The form fit that can be achieved with the aid of foam and injection mortar can thereby be adapted to the geometry of the object, for example the position of the bridge in a hollow brick, and the required amount of injection mortar can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Further features and advantages of the invention are apparent from the claims and the following description of preferred embodiments of the invention in conjunction with the accompanying drawings. In the drawings:

[0056] Figure 1 The anchor sleeve according to the invention is shown in a view obliquely from above.

[0057] Figure 2 Shows Figure 1 Side view of the anchor sleeve,

[0058] Figure 3 Shows the direction Figure 2 The view of the section plane III-III in

[0059] Figure 4 Shows Figure 1 Side view of the anchor sleeve carrier,

[0060] Figure 5 Shows Figure 1 Another side view of the anchor sleeve, wherein Figure 5 The anchor sleeve in Figure 2 The diagram is rotated 90° around the central longitudinal axis,

[0061] Figure 6 Shows Figure 4 Another illustration of a carrier of an anchor sleeve, wherein the carrier is relative to Figure 4 The diagram is rotated 90° around the central longitudinal axis,

[0062] Figure 7 Shows the direction Figure 1 Top view of the anchor sleeve,

[0063] Figure 8 Shown from below Figure 1 View of the anchor sleeve,

[0064] Fig. 9 Shown in a state of being pulled out from each other Figure 4The carrier,

[0065] Fig.10 Relative to Fig. 9 The diagram shows a 90° rotated view of Fig. 9 The carrier,

[0066] Fig.11 Shows the insertion into Figure 1 The anchor sleeve is a tubular element made of foam in front of the carrier.

[0067] Fig.12 A diagram is shown for illustrating the geometry of the tubular element. Fig.11 Schematic diagram of the profile of the tubular element,

[0068] Fig.13 Shows Fig.11 and Fig.12 A side view of a tubular element,

[0069] Fig.14 Shows the direction Fig.13 The view of the section plane XIV-XIV in

[0070] Fig.15 Shows Fig.13 Another side view of the tubular element, wherein Fig.15 The tubular element in Fig.13 The diagram is rotated by 90° about its central longitudinal axis,

[0071] Fig.16 Shows the direction Fig.15 The view of the section plane XVI-XVI in

[0072] Fig.17 Shows the direction Fig.11 and 12 a top view of a tubular element, and

[0073] Fig.18 Shown from below Fig.11 and 12 A view of a tubular element,

[0074] Fig.19 A schematic cross-sectional view of an assembly with an anchor rod 58 and an anchor sleeve 10 and an opening 50 in a hollow hole brick is shown,

[0075] Fig. 20 A schematic cross-sectional view of an assembly with an anchor rod 58 and an anchor sleeve 10 and an opening 50 in a hollow hole brick is shown, wherein injected mortar 60 escapes from the outer periphery of the tubular element 14 . DETAILED DESCRIPTION

[0076] Figure 1An anchor sleeve 10 according to the invention is shown, which has a carrier 12 made of plastic. The carrier 12 is made of a load-bearing plastic, such as polyurethane or polypropylene, which can be mechanically loaded and is only slightly flexible. In other words, the carrier 12 is made of a plastic such as is also used for plastic pins.

[0077] The anchor sleeve 10 also has a tubular element 14 made of coarse-pore, open-pore or open-pore foam. The foam is, for example, a filter foam based on polypropylene (PP), polyamide (PA), polyethylene (PET) or the like, as is also used as filter material in aquariums. Open-pore or open-pore polyether foams can also be used. In each case, the porosity of the foam is between 15 pores per inch (PPI, pores per inch) and 25 PPI, and in particular 20 PPI.

[0078] The tubular element 14 is clamped on the carrier 12. Within the scope of the invention, the tubular element can also be glued, welded or connected in another way to the carrier in a force-fitting or material-fitting manner.

[0079] The carrier 12 has an inlet bushing 16 forming an annular inlet flange. The carrier 12 also has two connecting strips 18, Figure 1 Only one of the two connecting strips 18 can be seen in FIG. Figure 1 The connecting strip 18 visible in the figure connects the half shell 20 to the end piece 22, which is connected on the outside and on the inside. Figure 1 The end piece 22, the two connecting strips 18 and the two half shells 20 are made of a one-piece plastic component. The entry bushing 16 is also made of a one-piece plastic component.

[0080] The tubular element 14 has two grooves 24 extending from the outside to the inside parallel to its central longitudinal axis, wherein Figure 1 Only one of the grooves can be identified. Each groove 24 accommodates a connecting strip 18.

[0081] The half shells 20 each have a groove or recess 26, see Figure 2 . This recess 26 is used to insert a wire which then preloads the two half-shells 20 against the cylindrical section of the entry bushing 16. The section of the tubular element 14 is clamped between the half-shells 20 and the outer wall of the cylindrical section of the entry bushing 16, as will be explained below. By preloading the half-shells 20 inwardly against the entry bushing 14, the wire arranged in the recess 26 is tensioned in order to clamp the tubular element 14 consisting of foam. Within the scope of the invention, different connections of the two half-shells 20 are of course possible, for example by means of a spring ring, an annular collar at the entry bushing 16 or also by means of gluing or welding.

[0082] Figure 2The truncated cone-shaped end piece 22 can be seen, which, as explained, is designed in one piece with the two connecting strips 18 and the two half shells 20, wherein the two connecting strips 18 are connected at Figure 2 Not recognizable in the view of , but see Figure 4 .

[0083] Figure 5 Shows relative to Figure 2 A 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. Figure 5 It can also be seen that the connecting strip 18 is accommodated in the groove 24 of the tubular element 14 composed of foam.

[0084] Figure 2 and Figure 5 A clamping rivet 28 can be seen in a partial section, which is pressed from the inside through an opening in the end piece 22 , engages there and thus also clamps the tubular element 14 composed of foam on the end piece 22 .

[0085] Figure 3 Shows the direction Figure 2 The cross-sectional view of the section plane III-III in FIG. Figure 3 In this sectional view of FIG. 1 , the connecting strips 18 cannot be seen since they are arranged perpendicular to the section plane III-III. Figure 3 Firstly, the design of the inlet bushing 16 with the annular inlet flange 30 and the cylindrical section 32 can be seen. Figure 4 and Figure 6 The cylindrical section 32 is provided with a locking lug 34 extending outward at its lower end. Fig. 9 and Fig.10 It can also be well identified.

[0086] Figure 3 It can be seen that the section of the tubular element 14 made of foam, which is adjacent to the inlet flange 30, is pressed together between the two half-shells 20 and clamped against the cylindrical section 32 of the inlet bushing 16. The tubular element 14 is thereby securely clamped to the half-shells 20 and to the inlet bushing 16, since, as explained, the half-shells 20 are prestressed radially inwardly, for example by means of a surrounding and tensioned wire.

[0087] The tubular element 14 is also clamped at the end piece 22 by means of a clamping rivet 28. To this end, the clamping rivet 28 is pushed through the blind hole 36 in the tubular element 14 to the base of the blind hole and then pressed through the bottom of the blind hole until it snaps into the opening of the end piece 22, as in this example. Figure 3Since the tubular element 14 consists of a very flexible coarse-pore open-cell foam, the clamping rivet 28 can be pressed 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. By means of the clamping rivet 28, the tubular element 14 consisting of foam is thus also reliably clamped at the end piece 22.

[0088] Figures 11 to 18 A tubular element 14 consisting of foam is shown before being inserted into a carrier 12. Fig.14 and Fig.16 The cross-sectional view in FIG. 1 clearly shows the construction of the tubular element 14 with the central blind hole 36. Fig.16 In FIG. 1 , the section plane extends through two grooves 18 which extend inwardly from the outer surface of the tubular element 14 and which, as explained, are provided to respectively accommodate a connecting strip 18 of the carrier 12 .

[0089] exist Fig.11 In the embodiment of the present invention, an attempt is made to present the coarse-pore open-cell structure of the tubular element 14 composed of foam.

[0090] Fig.17 A view from above is shown of the tubular element 14. The blind hole 36 and the two grooves 24 can be seen. Fig.18 A view from below is shown of the tubular element 14. In this view, the blind hole 36 cannot be seen, only the two grooves 24 can be seen.

[0091] Figure 7 Shown from above Figure 1 In this view, the blind hole 36 is viewed and the clamping rivet 28 can be seen at the base of the blind hole, see Figure 3 .

[0092] Figure 8 The view from below shows the anchor sleeve 10. Starting from the end piece 22 is a connecting strip 18 which is arranged in a groove 24 of the tubular element 14. The clamping section of the clamping rivet 28 which is pressed through the central opening of the end piece 22 can also be seen.

[0093] To assemble the carrier 12 and the tubular element 14 into the anchor sleeve 10, it can be done as follows. Figures 11 to 18 , which shows a tubular element 14 consisting of foam before assembly with a carrier 12, and reference Fig. 9 and 10 , which shows the carrier 12 before assembly. Fig. 9 The clamping rivet 28 is shown in Fig.10 The clamping rivet 28 is omitted for clarity. As already explained, the assembled anchor sleeve is Figures 1 to 3 as well as Figure 7and Figure 8 Presented in.

[0094] In order to mount the tubular element 14 on the carrier 12, the tubular element 14 is first inserted between the two connecting strips 18 until the end of the tubular element 14 is closed at the bottom (see Fig.18 ) abuts against the inner side of the truncated cone-shaped end piece 22. For this purpose, the two connecting strips 18 can be bent outwards a distance so that the tubular element 14 is moved 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 Figure 1 and 5 The two half-shells 20 are then placed at the outside of the tubular element 14 .

[0095] Fig. 9 and Fig.10 It can be seen that both connecting strips 18 are provided with serrations 40. These serrations 40 engage in the foam material of the tubular element 14 and secure the tubular element 14 against movement parallel to the central longitudinal axis of the anchor sleeve 10, see Figure 1 In this case, the serrations 40 of the two connecting strips 18 extend in the circumferential direction of the tubular element 14 , so that the serrations 40 thus engage in the side walls of the groove 24 in the tubular element 24 .

[0096] Fig.10 It can be seen that the saw teeth 40 are arranged on both sides of the connecting strip 18 over almost the entire length of the connecting strip 18. Fig.10 On the left side, the steep side of the sawtooth 40 faces the end piece 22, and on the opposite side, Fig.10 On the middle right, the steep side of the serration faces the half shell 20. By means of the serration 40, a movement of the tubular element 14 relative to the carrier 12 in the direction towards the end piece 22 and also in the opposite direction, ie in the direction towards the half shell 20, can be prevented.

[0097] After the tubular element 14 has been inserted between the two connecting strips 18 , the clamping rivet 28 is introduced into the blind hole 36 of the tubular element 14 , see also Figure 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 engages in the clamping rivet 28. Figure 3 The clamping rivet 28 is moved so far relative to the end part 22 until Fig. 9 and Figure 3 The latching lugs at the lower ends of the clamping rivets 28 in the end piece 22 snap onto the boundary edges of the central opening in the end piece 22. The bottom of the tubular element 14 made of foam is strongly compressed here and is clamped at the end piece 22 at the same time.

[0098] Subsequently, the entry bushing 16 is pressed or moved into the blind hole 36 of the tubular element 14 until the upper side of the tubular element 14 abuts against the lower side of the annular flange 30 of the entry bushing 16. The half shells 20 then also abut against the lower side of the annular flange 30 or are arranged at a very small distance from the lower side of the annular flange 30. Subsequently, as already discussed, the two half shells 20 are pressed inwardly and fixed in this pressed-in position, for example by means of a wire or spring ring surrounding the two half shells 20. See Figure 4 and Figure 6 , the latching lug 34 at the entry bushing 16 is then located below the edge of the half-shell 20 facing the end piece 22. The entry bushing is thus fixed to the half-shell 20, and the tubular element 14 is also located between the outer wall of the cylindrical section 32 of the entry bushing 16 and the corresponding inner wall of the half-shell 20 and is thus firmly clamped to the carrier 12. This results in the tubular element 14 being firmly fixed to the carrier 12. Figure 1 , 2 , 3 and 5 , which are strongly pressed together and clamped in the region of the end piece 22 and in the region of the entry bushing 16 .

[0099] In order to fix the anchor element in the opening of the object by means of the anchor sleeve 10, the anchor sleeve 10 (see Fig.19 ) is moved into the opening of the object until the underside of the annular flange 30 of the entry bushing 16 abuts against the surface of the object. Fig.19 In the case of the hollow hole brick, the opening is implemented as a drilled hole in the hollow hole brick. Fig.19 It can be seen that the inner diameter of the bore 50 in the hollow hole brick is smaller than the outer diameter of the tubular element 14 of the anchor sleeve 10. As a result, the tubular element 14 is compressed in the region of the bridges 52, 54 of the hollow hole, outside of which the tubular element 14 tries to assume its original shape again and therefore bends outwards and therefore has a larger outer diameter between or beside the bridges 52, 54 than the diameter of the bore 50 in the bridges 52, 54. In order to be able to move the anchor sleeve 10 completely into the opening 50, a mortar injector 56 (which is located in the bottom of the anchor sleeve 10) is used. Fig.19 The anchor sleeve 10 (shown only schematically and in sections) is moved to the base of the blind hole in the tubular element 14 and thus to the free end of the mortar injector 56 abuts against the inner side of the end piece 22. As a result, even if the anchor sleeve 10 extends through a plurality of bridges or has a borehole wall with damaged areas, the anchor sleeve 10 can be pushed or moved into the opening without problems until the end of the blind hole is reached. Fig.19 The location presented in .

[0100] from Fig.19Starting from the situation presented in FIG. 1 , the injection mortar is brought into the blind hole of the tubular element 14 by means of the injection mortar injector 56. This is done in a plurality of strokes, usually by means of six strokes, wherein after each stroke the injection mortar injector 56 is pulled a certain distance out of the blind hole of the tubular element 14. This is referred to as filling the anchor sleeve 10 from the base.

[0101] Alternatively, after the anchor sleeve 10 is moved in, Fig.19 Based on the situation presented in FIG. 5 , the injection mortar syringe can be pulled back and the filling with injection mortar can be carried out starting from the blind hole, ie approximately at the level of the bridge 52 .

[0102] When the blind holes 36 of the tubular element 14 are filled with the injection mortar, the injection mortar has already penetrated into the open pores of the tubular element 14 consisting of foam and at least partially fills them. Fig.19 It can already be seen in the figure that a so-called caulking formation has been achieved by simply filling the foam with injection mortar. It is sufficient here to fill only the hole of the tubular element 14 with injection mortar. This is because the tubular element 14 already protrudes outwards between the bridges 52, 54 and beside the bridges 54, and thus a form fit has already been formed at the bridges 52, 54. This form fit prevents the anchor sleeve 10 with the anchor element arranged therein from being pulled out of the object or opening 50 in the hardened state of the injection mortar.

[0103] However, the injected mortar usually escapes from the outside of the tubular element 14 at the latest when the anchor element is inserted into the anchor sleeve 10 and thereby improves the form fit and also the material fit with the object (in the present case, thus with the bridges 52 , 54 of the hollow hole brick).

[0104] from Fig.19 Starting from the state where the anchor sleeve is filled with injection mortar as described, the injection mortar injector 56 is pulled out of the anchor sleeve 10 and the anchor element (usually an anchor rod 58), see Fig. 20 , even before the injected mortar hardens, moves into the anchor sleeve 10.

[0105] As injection mortar, free radical hardening injection mortar or, for example, epoxy resin can be used. It is essential that the injection mortar is pasty or viscous in the unhardened state so that it can penetrate into the holes of the tubular element 14 composed of foam and thus can be squeezed out of the blind hole 36 of the tubular element 14 when the anchor rod 58 is inserted. Fig. 20A schematic cross-sectional view of an anchor sleeve 10 is presented. It can be seen that the anchor rod 58 is inserted into it as far as the inner side of the end part 22 of the anchor sleeve 10. The end part 22 provides a reliable stop here. 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 abuts against the inner circumference of the blind hole 36 of the tubular element 14 composed of foam. In order to form a material fit and a form fit with the injection mortar, the injection mortar does not have to flow back, but is automatically pressed into abutment with the outer circumference of the anchor rod 58 by the flexibility and elasticity of the foam of the tubular element 14.

[0106] exist Fig. 20 Schematically depicted in FIG. 1 is how the injected mortar 60 escapes from the outer periphery of the tubular element 14. An attempt is made to present that the injected mortar escapes in non-aligned lines or bundles. This is because the holes in the tubular element 14 are not arranged regularly. As a result, the individual bundles of injected mortar 60 escaping from the tubular element 14 are connected to one another. Therefore, the so-called spaghetti effect in conventional screen sleeves, in which the bundles are placed side by side in an orderly manner and are not connected to one another, does not occur in the anchor sleeve 10 according to the invention. Instead, the escaping bundles of the injected mortar 60 wedge and tangle and thereby strengthen the form fit of the anchor sleeve 10 at the bridges 52, 54 of the hollow hole bricks.

[0107] Fig.19 and Fig. 20 The assembly presented in the figure with the anchor element, i.e. the anchor rod 58 and the anchor sleeve 10 according to the invention, and the opening 50 in the object, i.e. the hollow hole brick, therefore ensures a high anchoring force and a connection of the anchor sleeve 10 and the injected mortar 60 to one another and a secure form fit of the anchor rod 58 in the object, i.e. the hollow hole brick.

[0108] A further positive fit between the anchor sleeve 10 and the bridges 52, 54 also occurs in the region of the bridges 52, 54. The recesses and reliefs in the inner wall of the opening 50 are filled with injection mortar. In addition, in the region of the bridges 52, 54, a material fit can also be achieved between the material of the bridges 52, 54 and the injection mortar 60.

Claims

1. An anchor sleeve (10) for an injection system for fixing an anchor element in an opening (50) in an object, in particular a drilled hole in masonry, characterized in that The anchor sleeve (10) is composed at least in sections of a flexible, permeable open-cell foam.

2. The anchor sleeve (10) according to claim 1, characterized in that The anchor sleeve (10) has a tubular element (14) made of foam.

3. The anchor sleeve (10) according to claim 2, characterized in that: The tubular element (14) made of foam forms a blind hole.

4. Anchor sleeve (10) according to any one of the preceding claims, characterized in that The number of cells in the foam is between 15 ppi (pores per inch) and 25 ppi, in particular 20 ppi.

5. Anchor sleeve (10) according to at least one of the preceding claims, characterized in that A carrier (12) having an end piece (22) and an inlet flange (30) is provided, wherein the foam is fastened to the carrier (12).

6. The anchor sleeve (10) according to claim 5, characterized in that The end piece (22) and the inlet flange (30) are connected by means of at least one connecting strip (18).

7. The anchor sleeve (10) according to claim 6, characterized in that The at least one connecting strip (18) is provided with anchoring elements, in particular teeth (40) and / or hooks, for engaging the foam.

8. The anchor sleeve (10) according to claim 7, characterized in that The serrations (40) and / or hooks extend away from the connecting strip (18) in the direction of the circumference of the tubular element (14) made of foam.

9. An anchor sleeve (10) according to claim 7 or 8, characterized in that The saw teeth (40) are oriented partially in a direction toward the end piece (22) and partially in a direction away from the end piece (22).

10. Anchor sleeve (10) according to at least one of claims 6 to 9, characterized in that The tubular element (14) made of foam is provided with at least one groove (24) extending in the longitudinal direction, and the connecting strip (18) is arranged in the groove (24).

11. Anchor sleeve (10) according to claim 10, characterized in that The slot (24) extends inwardly from the outside of the tubular element.

12. Anchor sleeve (10) according to at least one of the preceding claims, characterized in that A carrier (12) having an end piece (22) and an inlet flange (30) is provided, wherein the foam is connected to the end piece (22) and / or to the inlet flange (30), in particular clamped to the end piece (22) and to the inlet flange (30).

13. The anchor sleeve according to claim 12, characterized in that The end piece (22) is provided with a through-opening and the foam is clamped on the end piece (22) by means of a clamping rivet (28) which is inserted into the through-opening.

14. Anchor sleeve according to claim 12 or 13, characterized in that The at least one connecting strip is provided with a retaining shell at its end opposite the end piece (22), and the entry flange (30) is formed by means of an entry bushing (16), wherein the foam is clamped between the retaining shell (20) and the entry bushing (16).

15. An anchor sleeve according to claim 12, 13 or 14, characterized in that The end piece (22) is provided with a truncated cone-shaped guide section on its side facing the inlet flange (30), which guide section tapers in a direction away from the inlet flange (30).

16. Assembly with 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 tubular element made of foam and the anchor element has an anchoring section which is designed to be inserted into the tubular element (14), wherein the inner diameter of the tubular element (14) is at least partially smaller than or equal to the outer diameter of the anchor element in the anchoring section.

17. The assembly according to claim 16, characterized in that The outer diameter of the tubular element (14) is at least partially greater than the inner diameter of an opening (50) provided for introducing the anchor sleeve (10).

18. Assembly according to claim 16 or 17, characterized in that The anchor element is inserted into the anchor sleeve (10) to such an extent that the end of the anchor element bears against the inner side of the end piece (22) of the anchor sleeve (10).

19. An assembly with an anchor sleeve according to at least one of claims 1 to 15, wherein the anchor sleeve (10) has a tubular element (14) made of foam, with an anchor element, with an opening (50) in an object, in particular a drilled hole in a building wall, and with injection mortar, characterized in that The anchor sleeve (10) is at least partially inserted into the opening (50), the injection mortar at least partially fills the holes of the foam, the anchor element is partially inserted into the anchor sleeve (10), the foam is at least partially pressed radially outward relative to an initial position before the injection mortar is filled into the anchor sleeve (10) and before the anchor element is inserted into the anchor sleeve (10), and the anchor element at least partially abuts against the inner side of the tubular element (14), and the hole of the tubular element (14) is at least partially filled with the injection mortar.

20. The assembly according to claim 19, characterized in that A section of a tubular element (14) made of foam forms a toroidal structure directly behind an inlet bridge (52) of the opening (50), the bore of the tubular element (14) being at least partially filled with the injection mortar, the outer diameter of the toroidal structure being greater than the inner diameter of the opening (50).

21. The assembly according to claim 19, characterized in that A section of a tubular element (14) made of foam forms a cylindrical or toroidal structure between the opening (50) and another opening in the inner bridge portion (54) of the object, the bore of the tubular element (14) being at least partially filled with the injection mortar, the outer diameter of the cylindrical or toroidal structure being greater than the inner diameter of the opening (50).

22. A method for fixing an anchor element in an opening (50) of an object by means of an anchor sleeve according to at least one of claims 1 to 15, characterized in that The anchor sleeve (10) is at least partially inserted into the opening (50), injection mortar is filled into the anchor sleeve (10), and the anchor element is partially inserted into the anchor sleeve (10).

23. The method according to claim 22, characterized in that The anchor sleeve (10) is placed onto a mortar injection syringe (56), in particular until the free end of the mortar injection syringe (56) comes to abut against the end piece (22) of the anchor sleeve (10), and the anchor sleeve (10) is inserted together with the mortar injection syringe into the opening.

24. The method according to claim 22 or 23, characterized in that The injection mortar is filled into the anchor sleeve (10) starting from the base of the anchor sleeve (10).

25. The method according to claim 22 or 23, characterized in that The injection mortar is filled into the anchor sleeve (10) starting at or immediately behind the open end of the anchor sleeve (10), in particular starting at the first third of the length of the anchor sleeve (10).

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