HK1066042A - Anchor sleeve for injection fixing - Google Patents

Description

Anchor sleeve for injection type fixation

Technical Field

The invention relates to an anchor sleeve for injection fixation having the features of the preamble of claim 1. Injection fixing here means that an anchor rod is anchored in a borehole in a bricklayed building with, for example, mortar.

Background

Such anchor sleeves are known per se. They are for example in the form of plastic screen casings and are fitted for anchoring into a bore hole in a brickwork construction. Finally, the stucco is poured into and out of the anchor casing through the mesh of the anchor casing in the form of a screen casing. The mesh forms an outflow opening for stucco that is poured into the anchor sleeve. The anchor rod is then installed into the anchor sleeve. It advances and compresses the mortar and after the mortar hardens it is anchored in the bore hole of the brickwork construction.

The known anchor sleeves have the disadvantage of being designed only for anchors of a specific diameter.

Disclosure of Invention

The object of the invention is to design an anchor sleeve of the type mentioned above such that it can be used for anchor rods of different diameters.

According to the invention, the above-mentioned object is achieved by the features of claim 1. The anchor sleeve according to the invention with the features of claim 1 has inwardly projecting support elements which support an anchor rod inserted between them in the anchor sleeve. The support may be a tenon, a projection, a rib, or the like. They hold the anchor rod inserted into the anchor sleeve in a defined position.

The support members are preferably arranged and configured such that they can support an anchor rod inserted into the anchor sleeve at least substantially coaxially within the anchor sleeve. In this way, a defined position of the anchor rod anchored in the bricklayed building can be obtained. Eccentric and/or oblique anchoring of the anchor rod in the anchor sleeve is avoided.

One embodiment of the invention is provided with an elastically and/or plastically deformable support. The deformability is obtained by the shape of the support and by the material of the support, such as plastic. The advantage of the support being deformable is that the support can accommodate bolts of different diameters.

The support may be in the form of, for example, a tenon, a projection, a rib, or the like. One embodiment of the invention is provided with support ribs as support elements, which extend in the longitudinal direction of the anchoring sleeve or extend helically. This has the advantage that the anchor sleeve is easy to demould when it is manufactured from plastic by injection moulding or a similar manufacturing method. In addition, the support ribs as support elements have the advantage that they can be deformed when inserting the anchor rod into the anchor sleeve.

In a further development of the invention, the support ribs are arranged offset transversely with respect to an imaginary axial plane of the anchor sleeve. The support ribs therefore project not radially but tangentially inwards. The advantage of this embodiment of the invention is that the support rib does not bear vertically but tangentially against the circumferential surface of the anchor rod inserted into the anchor sleeve and is therefore easily pressed to one side by the anchor rod and deformed. This allows the anchor sleeve to be easily adapted to different diameters and enlarges the range of possible diameters of rock bolts that can be inserted into the anchor sleeve. The anchor rods with different thicknesses are easily coaxially supported in the anchor sleeve.

Drawings

The invention will be described in detail below with reference to an embodiment shown in the drawings, in which:

FIG. 1 is a perspective view of an anchor sleeve according to the present invention;

fig. 2 is a front view of the anchor sleeve according to arrow II in fig. 1; and

fig. 3 shows the anchor sleeve with an inserted anchor rod in a view similar to fig. 2, in which two anchor rods of different diameters are shown.

Detailed Description

The anchor sleeve 10 according to the invention, which is shown schematically in fig. 1 and is used for injection-type anchoring, is made in one piece from plastic. The anchor sleeve 10 is in the form of a screen, i.e. its circumferential wall has a plurality of screen openings in the form of a screen, which form outlets 12 for the outflow of stucco that is fed into the anchor sleeve 10. The rear portion of the sleeve 10 is open for insertion of an anchor rod, not shown in figure 1, and has an outwardly projecting locating flange 14 in the form of a looped plate which is integral with the sleeve 10. A forward or insertion end 16 of the anchor sleeve 10 is designed to be closed. The anchor sleeve 10 is inserted with its front end forward in a not shown bore hole in the bricklayed building.

On its inner side, the anchor sleeve 10 according to the invention has support ribs 18 which form support elements for inserting the anchor rod into the anchor sleeve 10. In the exemplary embodiment of the invention shown and described, the anchoring sleeve 10 has four supporting ribs 18 which are evenly distributed over the circumference. The support member 18 extends in the longitudinal direction of the anchor sleeve 10; they are formed integrally with the anchor sleeve 10, i.e. they are made of plastic and are elastically and/or plastically deformable. The support ribs 18 are not arranged radially in the anchoring sleeve 10, that is to say not in the imaginary axial plane of the anchoring sleeve 10, but are offset laterally and tangentially with respect to the imaginary axial plane of the anchoring sleeve 10, as shown in fig. 2. The four supporting ribs 18 are offset by the same distance in the same direction. The support ribs 18 are arranged in the tangential direction and are arranged symmetrically.

The support rib 18 holds coaxially in the anchor sleeve 10 an anchor rod 20, such as a threaded rod, which is inserted into the anchor sleeve 10. When the anchor rod 20 is inserted into the anchor sleeve 10, the anchor rod presses the support rib 18 to one side, which is simplified by the arrangement of the support rib 18 in the tangential direction. Due to the arrangement in the tangential direction, the support rib 18 does not contact the outer circumferential surface of the anchor rod 20 perpendicularly but tangentially, which makes it easier for the support rib 18 to be pressed to one side. Nevertheless, a coaxial support of the anchor rod 20 in the anchor sleeve 20 is ensured. The support ribs 18 allow different thicknesses of the anchor rod 20 to be inserted into the anchor sleeve 10. The thicker anchor rods 20 press the support rib 17 further to one side than the thinner anchor rods 20. Fig. 3 schematically shows the coaxial mounting of bolts 20 of different thicknesses, the upper half of the drawing schematically showing the thicker bolt 20 and the lower half of the drawing schematically showing the thinner bolt 20.

The anchor sleeve 10 is used as follows: for anchoring an anchor rod 20, the anchor sleeve 10 is inserted into a not shown borehole in the brickwork construction, so that it rests with the retaining flange 14 on the brickwork construction. Then, mortar, and particularly synthetic resin mortar, is injected into the anchor sleeve 10 through the open rear portion of the anchor sleeve 10. The injection mortar flows out of the anchor sleeve 10 through the outlet 12 and into a gap between the anchor sleeve 10 and the borehole, not shown. After the mortar is injected, the anchor rod 20 is inserted into the anchor sleeve 10, and the anchor rod 20 is advanced and compresses the injected mortar. The support ribs 18 guide the anchor rod 20 coaxially and ensure coaxial alignment of the anchor rod 20 within the anchor sleeve 10. After the mortar hardens, the bolt 20 is firmly anchored into the borehole.

Claims (5)

1. Anchor sleeve for injection fixation, which anchor sleeve has an outlet for the outflow of mortar injected into the anchor sleeve, characterized in that the anchor sleeve (10) has inwardly projecting support elements (18) which support, in the anchor sleeve (10), an anchor rod (20) inserted into the anchor sleeve (10).

2. An anchorage member according to claim 1, wherein the support member (18) supports an anchor rod (20) inserted into the anchorage member (10) substantially coaxially within the anchorage member (10).

3. An anchorage assembly according to claim 1, wherein the support member (18) is deformable.

4. An anchorage member according to claim 1, wherein the support member (18) is in the form of a longitudinally extending or helically extending support rib (18).

5. An anchorage member according to claim 4, wherein the support member (18) is arranged to be offset tangentially relative to an imaginary axial plane of the anchorage member (10).