AU2008258128B2

AU2008258128B2 - Injection-securable anchor and anchor tube for the injection-securable anchor

Info

Publication number: AU2008258128B2
Application number: AU2008258128A
Authority: AU
Inventors: Herbert Ginter; Christian Plockross; Martin Reuter
Original assignee: Hilti AG
Current assignee: Hilti AG
Priority date: 2007-12-20
Filing date: 2008-12-12
Publication date: 2011-04-21
Anticipated expiration: 2028-12-12
Also published as: AU2008258128A1; DE102007055893A1; US20090158678A1; CN101463630A; JP2009150213A; EP2072838A2; JP5517443B2; EP2072838A3

Description

AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT ORIGINAL Name of Applicant/s: Hilti AG Actual Inventor/s: Herbert Ginter and Christian Plockross and Martin Reuter Address for Service is: SHELSTON IP 60 Margaret Street Telephone No: (02) 9777 1111 SYDNEY NSW 2000 Facsimile No. (02) 9241 4666 CCN: 3710000352 Attorney Code: SW Invention Title: INJECTION-SECURABLE ANCHOR AND ANCHOR TUBE FOR THE INJECTION-SECURABLE ANCHOR The following statement is a full description of this invention, including the best method of performing it known to me/us: File: 60607AUP00 -2 INJECTION-SECURABLE ANCHOR AND ANCHOR TUBE FOR THE INJECTION-SECURABLE ANCHOR BACKGROUND OF THE INVENTION 5 1. Field of the Invention The present invention relates to an injection-securable anchor for attaching a face brickwork to a loadbearing brickwork and, in particular, to an anchor tube for such an anchor and having a through-opening for receiving a fastening element. 10 2. Description of the Prior Art Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of common general knowledge in the field. An injection-securable anchor is set after raising a two-wall brickwork usually 15 through a joint in the face brickwork, which is also called a face wall, and transmits tension and compression forces acting on the face brickwork to the loadbearing brickwork which is also called a loadbearing wall. Frequent use of such an injection securable anchor necessitates an additional reconnection of a two-wall brickwork. This is because at a forcelocking connection of both brickworks with each other, the 20 connection is destroyed due to the corrosion of the connection element that was walled in during formation of the two-wall brickwork. . German Publication DE 30 04 276 Al discloses an anchor tube for an injection securable anchor and which has a through-opening for receiving a fastening element. The anchor tube can be provided in the regions of its ends with radial openings. For 25 setting the injection-securable anchor, firstly a borehole is formed in the loadbearing brickwork through the face brickwork and the air layer between the face brickwork and the loadbearing brickwork. Then, the anchor tube is inserted in the borehole. Finally, the injection-securable anchor is filled with injection mortar through a through-opening of the anchor tube. Upon insertion of the fastening element, the injection mortar that 30 fills the anchor is pressed out at the ends of the anchor tube. The length of the circumferentially closed section of the anchor tube is so selected that this section bridges the air layer between the face brickwork and the loadbearing brickwork.

-3 One drawback of the anchor tube disclosed in DE 30 04 276 Al is that, in practice, different two-wall brickworks with different width of the stone and air layers are raised and, therefore, a large number of differently formed anchor tubes must be available to the user to insure that advantages of such an injection-securable anchor are 5 achieved. German Publication DE 102 22 799 Al discloses sieve sleeves having radial wall sections with connection means provided at their ends. Several of such sieve sleeves are assembled to form a dowel body. After setting of such a dowel body in a borehole, it is filled with an injection mortar, and then a fastening element is inserted, with the 10 injection mortar being forced out outwardly through the sieve-shaped radial sections in a controlled manner. It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative. An object of the invention in at least one preferred form is to provide an anchor 15 tube for an injection-securable anchor for attaching a face brickwork to a loadbearing brickwork. Advantageously, an injection-securable anchor, which includes such an anchor tube, is suitable for different types and embodiments of two-wall brickworks. SUMMARY OF THE INVENTION According to a first aspect of the invention, there is provided an anchor tube for 20 an injection-securable anchor for attaching a face brickwork to a loadbearing brickwork, the anchor tube comprising a through-opening for receiving a fastening element; and at least a first connection element provided at least at a first end of the anchor tube for securing, on the anchor tube, a second anchor tube or a sleeve of the injection-securable anchor. 25 Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to". According to a second aspect of the invention there is provided an injection 30 securable anchor for attaching a face brickwork to a loadbearing brickwork, the injection-securable anchor comprising a fastening element; a further part; and an anchor tube having a through-opening for receiving the fastening element and at least first -4 connection element provided on at least a first end of the anchor tube and cooperating with a complementary counter-connection element provided on the further part for securing the further part on the anchor tube, wherein the further part is a second anchor tube or a sleeve of the injection-securable anchor. 5 Dependent on the width of the air layer or the distance between the face brickwork and the loadbearing brickwork or between the brickwork walls of a two- or multi-wall brickwork, an anchor tube having a corresponding length is selected. The anchor tube is connected by the connection element, which is provided at its first end, with a further part to form an injection-securable anchor. The further part has a counter 10 connection element that is complementary to the first connection element of the anchor tube. A sieve sleeve, for example, which is formed in accordance with the borehole depth in the loadbearing brickwork and connectable with the anchor tube, can be selected as a further part. The anchor tube according to at least one form of the present invention can be connected, for example, with sieve sleeves disclosed in DE 102 22 799 15 Al. Anchor tubes of different types and lengths and/or sieve sleeves of different types and lengths can be associated to form an injection-securable anchor for connecting a face brickwork with a loadbearing brickwork by the user, as needed, directly on the constructional site. An injection-securable anchor that includes an anchor tube 20 according to at least one embodiment of the present invention is a modular structure. With a small number of differently formed anchor tubes and sieve sleeves, a large number of different constructions of two-wall brickworks can be reliably formed. The injection-securable anchor can be simply and quickly adapted to actual use conditions at the constructional site such as, for example, stone type, thickness or quality of the 25 loadbearing brickwork and/or the face breakwork, and/or width of the air layer. Advantageously, a second connection element is provided at a second end of the anchor tube opposite the first end for securing, a still further part of the injection securable anchor on the anchor tube. This permits the connection of several anchor tubes according to at least one form of the present invention with each other to bridge a 30 correspondingly greater distance between the face brickwork and the loadbearing brickwork or a very wide air layer. Also, a sieve sleeve can be mounted also on the second end of the anchor tube and which, in a set condition of the injection-securable anchor, would be located in the face brickwork. This would advantageously insure an - 4a improved anchoring of the anchor in the face brickwork. The second sieve sleeve makes possible a purposeful anchoring of the anchor in the face brickwork. The above- -5 discussed injection-securable anchor is particularly advantageous when the brickwork has joints with a poor grouting quality. It is particularly advantageous when a sieve sleeve is provided at each end of the anchor tube. In addition, further connection or counter-connection elements can be provided 5 at a free end of the sieve sleeve that is connectable with the inventive anchor tube. The further connection or counter-connection elements enable attachment of further sieve sleeves to the sieve sleeves already mounted on the anchor tube. Advantageously, the connection element includes locking noses that, together with locking recesses forming the counter-connection elements, form a connection 10 device. The locking noses each advantageously have a section projecting from the outer profile and which insures a simple assembly of the elements of the injection-securable anchor. Advantageously, the locking noses fall off the elevated section transverse to the outer profile of a respective part. Thereby, an advantageous undercut with an edge region of the locking recesses is produced in the assembled condition of anchor parts. 15 According to an alternative embodiment, the connection elements have locking recesses, cooperating with locking noses. This advantageously insures a reliable assembly of the parts of the injection-securable anchor. The locking recesses can be simply produced. Advantageously, locking noses are formed at one end of the anchor tube, and 20 locking recesses are formed at the other end of the anchor tube. This insures an easy assembly of several anchor tubes according to at least one form of the present invention with each other. Advantageously, several connection elements are provided at an anchor tube end and which cooperate with a respective plurality of counter-connection elements. The 25 connection devices, which are formed by cooperating connection and counter connection elements, advantageously insure a reliable connection of the parts of the injection-securable anchor with each other. Advantageously, a plurality of connection elements is uniformly circumferentially rotationally-symmetrically distributed at an end of the anchor tube. 30 Advantageously, the plurality of the counter-connection elements is likewise uniformly circumferentially rotationally symmetrically distributed on the further part of the anchor and which is connectable with the anchor tube. This advantageously insures an even more reliable connection of the parts of the anchor.

- 6 Advantageously, at an end of the anchor tube, there are provided at least three connection elements, with the same number of the counter-connection elements being provided at a respective end of the further part that is assembled with the anchor tube. This permits to insure a predetermined alignment of parts of the anchor relative to each 5 other. In this way, the anchor part, that is assembled with the anchor tube, has the same number of counter-connection or connection elements. Advantageously, the anchor tube is formed of a plastic material. The sieve sleeve, which is connectable with the anchor tube, is also formed, at least in some regions, of a plastic material. It is particularly advantageous when all parts of an 10 injection-securable anchor are formed of a plastic material by an injection-molding process, which insures a simple production of the connection devices. The novel features of the present invention, which are considered as characteristic for the invention, are set forth in the appended claims. The invention itself, however, both as to its construction and its mode of operation, together with 15 additional advantages thereof, will be best understood from the following detailed description of preferred embodiment, when read with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS: 20 Preferred embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings in which: Fig. I is a cross-sectional view along line I-I in Fig. 2 of a first embodiment of an injection-securable anchor according to the present invention in a set condition; Fig. 2 is a side view of an anchor tube according to the present invention for the 25 injection-securable anchor; Fig. 3 is a side view of a first sieve sleeve of the inventive injection-securable anchor; Fig. 4 is a side view of a second sieve sleeve of the inventive injection-securable anchor; and 30 Fig. 5 is a side view of a second embodiment of an injection-securable anchor according to the present invention. In the drawings, the same elements are designated with the same reference numerals.

-7 DETAILED DESCRIPTION OFTHE PREFERRED EMBODIMENTS An injection-securable anchor 11, which is shown in its entirety in Fig. 1 and details of which are shown in Figs 2 and 3, includes, according to the present invention, an anchor tube 12 with a through-opening 13 for receiving a fastening element 8, and a 5 sieve sleeve 22 connectable with the anchor tube 12. First connection means 31 connects the sieve sleeve 22 with the anchor tube 12. For attaching a face brickwork 5 to a loadbearing brickwork 6, a borehole 9 is formed in the loadbearing brickwork 6 through the joint of the face brickwork 5 and the air layer 7. After the borehole 9 has been rinsed, the modular, assembled injection 10 securable anchor 11, together with the sieve sleeve 22, is passed through until the sieve sleeve 22 is located in the borehole 9. Then, the injection-securable anchor 11 is filled with injection mortar, and the fastening element 8, for example, a cut-to-length threaded rod is inserted in the injection-securable anchor 11 through the through-opening 13 of the anchor tube 12. Then, the injection mortar is brought out, in particular, in the region 15 of the sieve sleeve 22, reliably anchoring the anchor 11 in the loadbearing brickwall 6. The anchoring in the face brickwork 5 advantageously is carried out by filling or compressing the space between the anchor 11 or the fastening element 8 and the face brickwork. The anchor tube 12, which is shown in Fig. 2, has, in addition to the through 20 opening 13, a first connection element 32 provided at a first end 14 of the anchor tube 12 and formed of four locking noses uniformly rotationally symmetrically, distributed over the circumference of the anchor tube 12. On the opposite second end 15 of the anchor tube 12, there is provided a second connection element 53 formed of four locking recesses uniformly rotationally symmetrically, distributed over the circumference of the 25 anchor tube 12. The first connection element 32 and the second connection element 53 form part, respectively, of the first connection means 31 and second connection means 51. On the outer circumference of the anchor tube 12, there are further provided a plurality of rings 16 which function as condensate-draining rings and prevent condensate 30 flow from the face brickwork 5 to the loadbearing brickwork 6 along the anchor tube 12 in the assembled condition of the anchor 11. The sieve sleeve 22, which is shown in Fig. 3, has, at its first end 23, a counter connection element 33 displaceable together with a first connection element 32 of the - 8 anchor tube 12 and formed, similar to the second connection element 53 of the anchor tube 12, of four locking recesses uniformly rotationally-symmetrically distributed over the circumference of the sieve sleeve 22. The sieve sleeve 42, which is shown in Fig. 4 is shorter than the sieve sleeve 22 5 shown in Fig. 3. The sieve sleeve 42 has, at its second end 44 opposite its first end 43, a second counter-connection element 52 formed of four locking noses uniformly rotationally-symmetrically distributed over the circumference of the sieve sleeve 42 and forming part of the second connection means 51. Fig. 5 shows a modular assembled injection-securable anchor 41 having, at the 10 first end 14 of its anchor tube 12, the sleeve 22 and, at the second end 15 of the anchor tube 12, the sleeve 42. The sieve sleeve 22 and the sieve sleeve 42 are secured on the anchor tube 12 with the first connection means 31 and the second connection means 51, respectively. The second connection means 51 is formed by the second connection element 53, which is provided on the second end 15 of the anchor tube 12 and by the 15 counter-connection element 52 provided on the sieve sleeve 42. In the set condition of the anchor 41, the sieve sleeve 42 is located in the face brickwork 5, and the sieve sleeve 22 is located, as it was described with reference to the anchor 11, in the loadbearing brickwork. Though the present invention was shown and described with references to the 20 preferred embodiment, such is merely illustrative of the present invention and is not to be construed as a limitation thereof and various modifications of the present invention will be apparent to those skilled in the art. It is therefore not intended that the present invention be limited to the disclosed embodiment or details thereof, and the present invention includes all variations and/or alternative embodiments within the spirit and 25 scope of the present invention as defined by the appended claims.

Claims

1. An anchor tube for an injection-securable anchor for attaching a face brickwork to a loadbearing brickwork, the anchor tube comprising a through-opening for receiving a fastening element of the injection-securable anchor; and at least a first connection 5 element provided at least at a first end of the anchor tube for securing, on the anchor tube, a second anchor tube or a sleeve of the injection-securable anchor.

2. An anchor tube according to claim 1, comprising a second connection element provided at a second end of the anchor tube opposite the first end for securing, on the anchor tube, a second anchor tube or a sleeve of the injection-securable anchor. 10

3. An anchor tube according to claim I or claim 2, wherein the first connection element comprises locking noses.

4. An anchor tube according to claim 2, wherein the second connection element comprises locking recesses cooperating with locking noses provided on the still further part of injection-securable anchor. 15

5. An anchor tube according to any one of claims 2 to 4, wherein the first connection-element and the second connection element each comprises a plurality of connecting members.

6. An anchor tube according to claim 5, wherein the plurality of connecting members are uniformly circumferentially rotationally-symmetrically distributed at a 20 respective one of the first and second ends of the anchor tube.

7. An anchor tube according to claim 6, wherein the plurality of connecting members comprises at least three connecting members.

8. An injection-securable anchor for attaching a face brickwork to a loadbearing brickwork, the injection-securable anchor comprising a fastening element; a further part; 25 and an anchor tube having a through-opening for receiving the fastening element and at least a first connection element provided on at least a first end of the anchor tube and cooperating with a complementary counter-connection element provided on the further part for securing the further part on the anchor tube, wherein the further part is a second anchor tube or a sleeve of the injection-securable anchor. 30

9. An injection-securable anchor according to claim 8, wherein the counter connection element is provided at a first end of the further part.

10. An injection-securable anchor according to claim 9, wherein the first connection element comprises a plurality of locking noses, and the counter-connection element - 10 comprises a plurality of locking recesses for receiving respective locking noses of the plurality of locking noses.

11. An injection-securable anchor according to claim 10, wherein the plurality of locking noses and the plurality of locking recesses are uniformly circumferentially 5 rotationally-symmetrically distributed at respective first ends of the anchor tube and the further part, respectively.

12. An injection-securable anchor according to any one of claims 8 to 11, wherein the further part is formed as a sieve sleeve.

13. An anchor tube for an injection-securable anchor for attaching a face brickwork 10 to a loadbearing brickwork, the anchor tube being-substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples.

14. An injection-securable anchor for attaching a face brickwork to a load bearing brickwork, the anchor being substantially as herein described with reference to any one 15 of the embodiments of the invention illustrated in the accompanying drawings and/or examples.