DE202020106135U1 - Dowels and fastening system - Google Patents

Abstract

Dowel (1) with an anchoring body (6) for anchoring the dowel (1) in a borehole in an anchoring base and with a sleeve body (7) which is arranged in the insertion direction (E) behind the anchoring body (6), the sleeve body (7) has a screw channel (20) into which a fastening element (2) can be introduced, and wherein the sleeve body (7) has a sealing section (28) which surrounds the screw channel (20) in the circumferential direction (U) as a closed peripheral wall , characterized in that a connecting section (16) is arranged on the anchoring body (6) which protrudes into the sleeve body (7), is enclosed by it and which can be radially expanded by inserting the fastening element (2) into the screw channel (20) , in such a way that when the connecting section (16) is spread apart, at least part of the sealing section (28) can be moved radially outward.

Description

The invention relates to a dowel with the features of the preamble of claim 1 and a fastening system with the features of claim 14.

From the publication DE 198 45 696 A1 a generic anchor is known which can be anchored in a borehole in an anchoring base. The dowel has an anchoring body with two expanding legs, which is arranged in the direction of insertion of the dowel into the borehole in front of a sleeve body, that is to say is inserted into the borehole in front of the sleeve body when it is planned to be introduced into the borehole. The anchoring base can be, for example, concrete, masonry or a panel building material, for example a plasterboard. Tiles and / or a seal in particular are arranged on the anchoring base, for example in the area of a shower. When creating a borehole in the anchoring base, for example to attach a holder for a shower head or a soap dish, the tiles and / or the seal are penetrated so that water can penetrate into the borehole and behind the tiles and / or the seal. In order to prevent water from penetrating when the anchor is installed, the sleeve body comprises a sealing section. The sealing section is made of a soft, rubber-like plastic and has an enlarged diameter compared to the rest of the sleeve body. For assembly, the dowel is introduced into the borehole so that the sealing section lies in the area of the tile and / or the seal in the borehole. Then a screw is screwed into the dowel as a fastening element which spreads the expansion legs of the anchoring body, whereby the dowel is anchored in the anchoring base. When inserting the screw, the sealing section is pressed by the screw against the borehole wall, whereby the borehole is sealed against penetrating water. The disadvantage of the known dowel is that, due to the large diameter of the sealing section, it can only be introduced into a borehole with great effort. It can therefore happen that a user does not insert the dowel far enough into a borehole so that no or only insufficient sealing of the borehole can be achieved.

The object of the invention is therefore to create a dowel which is easy to assemble and which enables a borehole to be effectively sealed against the ingress of water.

According to the invention, this object is achieved by a dowel having the features of claim 1 and by a fastening system according to claim 14.

The anchor according to the invention has an anchoring body for anchoring the anchor in a borehole in an anchoring base and a sleeve body. The dowel extends along a longitudinal axis along which the anchoring body and the sleeve body are arranged one behind the other. The anchoring body is arranged in front of the sleeve body in the direction in which the dowel is inserted into the borehole, that is to say that the anchoring body is inserted into the borehole before the sleeve body when the anchor is installed as planned. The longitudinal axis and the direction of introduction run parallel to one another.

The anchoring body can have expansion elements for mechanical anchoring of the anchor in the borehole, as is known from so-called expansion anchors. Alternatively, the anchoring body can be designed as a sieve sleeve for knotting or for anchoring the dowel by means of a mortar mass, as is known from so-called chemical anchoring systems. The combination of a mechanical and a chemical system is also possible, this enumeration of the possible design of the anchoring body being exemplary and not conclusive.

The sleeve body is connected to the anchoring body and has a screw channel into which a fastening element can be introduced. The sleeve body is designed in particular as a hollow cylinder, which extends in height in the direction of the longitudinal axis, the hollow inner part of the cylinder forming the screw channel. The fastening element is preferably a screw which is screwed into the screw channel for fastening and which engages positively with its thread in the material of the dowel, as is known from conventional expansion dowels. An attachment can be attached to the dowel with the fastening element. The attachment is, for example, a shelf, a soap dish or a holder for a shower head, which can be attached in the wet area of a bathroom. In order to prevent water from penetrating the borehole after the attachment has been installed, the sleeve body of the anchor has a sealing section which seals the borehole against the ingress of water, in particular at the borehole mouth or in the area of a tile and / or a seal. The sealing section encloses the screw channel in the circumferential direction as a closed circumferential wall, that is to say in the form of a ring as a closed sleeve. In particular, the sleeve body as a whole can form the sealing section.

According to the invention, a connecting section is arranged on the anchoring body, which protrudes into the sleeve body, is enclosed by this and which by introducing the fastening element into the Screw channel is radially expandable, such that at least part of the sealing portion is movable with the connecting portion when expanding radially outward, that is away from the longitudinal axis in the direction of the borehole wall. In particular, the connecting section not only protrudes into the sleeve body, but engages in it so that a form-fitting connection is created between the sleeve body and the connecting section, so that the sleeve body is securely arranged on the anchoring body. In particular, the connecting section has an outside diameter that is smaller than the outside diameter of the sleeve body, with “outside diameter” meaning the diameter of a circumference around the respective section or body. This configuration according to the invention makes it possible to keep the diameter of the sealing section small, so that the dowel can easily be inserted into a borehole for a user and the dowel nevertheless effectively seals a borehole by additionally pressing the sealing section outwards allows water to penetrate.

The connecting section can in particular be slotted so that it has at least two geometrically determined and delimited expansion tongues, which are completely separated from one another or connected to one another by an injection-molded skin, by stretchable connectors or by other elements in such a way that the expansion tongues have a defined, predetermined and one another can perform independent movement radially outward to spread the sealing portion.

The connecting section is in particular in one piece with the anchoring body and protrudes from the anchoring body in particular to the rear and in particular parallel to the longitudinal axis. In particular, the connecting section is completely enclosed by the sleeve body in the radial direction, that is to say towards the outside, that is to say the connecting section is arranged within the lateral surface of the sleeve body. In particular, the connecting section is enclosed in a watertight manner by the sleeve body in the radial direction, that is to say towards the outside. In particular, the connecting section is arranged in the sleeve body in such a way that it rests flat against the inner wall of the sleeve body and encompasses the screw channel in the area in which it engages the sleeve body, so that it comes into direct contact with the fastener when the fastener is inserted into the screw channel occurs. Since the connecting section is arranged in such a way that it protrudes into the sleeve body, it also stabilizes the sleeve body, which is made in particular of a soft material, in the axial direction so that the expansion plug can be inserted into a borehole by pressing on the sleeve body.

In a preferred embodiment of the dowel according to the invention, the anchoring body has at least two expansion legs which include an expansion channel, that is to say at least partially enclose it in the circumferential direction. The expansion channel, like the screw channel, extends in the direction of the longitudinal axis of the dowel and is in particular arranged concentrically to the screw channel. In this embodiment of the anchor according to the invention, the fastening element is introduced through the screw channel of the sleeve body into the expansion channel of the anchoring body. By inserting the fastening element into the expansion channel, the expansion legs can be expanded radially, i.e. away from the longitudinal axis outward, whereby the anchor can be firmly anchored mechanically in a borehole or on a panel building material, as is known from expansion anchors.

The anchoring body is preferably made from a first plastic and the sealing section, in particular the entire sleeve body, is made from a second plastic, which is softer compared to the first plastic. The first plastic is suitable for permanent anchoring in the anchoring base. It must therefore be firm but malleable. In order to fulfill this function, polyamide is particularly suitable, a plastic that is usually used for high-quality expansion anchors. In contrast, the second plastic must be softer, in particular also more stretchable and / or more elastic than the first plastic, since the second plastic forms at least the sealing section that is intended to permanently seal the borehole and therefore has to adapt well to the geometry of the mostly irregular borehole wall, in this way that, after the fastening element has been introduced into the screw channel, the sealing section rests against the borehole wall in a flat sealing manner in the area of a tile, a seal and / or in the anchoring base. The second plastic is therefore in particular a thermoplastic polyurethane (TPU) or polyethylene, since these materials have the properties necessary for producing the sealing section. The fact that the second plastic is softer compared to the first plastic means here in particular that the second plastic has a Shore hardness of at most 70, while the first plastic has a Shore hardness above 70. In particular, the Shore hardness of the first plastic is a maximum of 90. With "Shore hardness" is meant here the hardness that according to method D according to DIN EN ISO 868: 2003-10 measured and referred to as "Shore D".

It is further preferred that the connecting section has a weakening running in the circumferential direction. The weakening can in particular take the form of a geometric weakening a groove which runs in the circumferential direction, in particular in the area in which the connecting section is connected to the anchoring body. The weakening has the effect that the connecting section can be spread open radially by the fastening element without great resistance. The weakening acts in particular as a desired bending point, in particular when the connecting section is slotted and expansion tongues formed by the slitting are designed to be pivotable outward about this desired bending point. If the weakening is designed as a geometric weakening, this also has the advantage that the sleeve body can engage in the groove for the positive connection of the sleeve body with the anchoring body, so that the groove has a double function. Instead of or in combination with a geometric weakening, the weakening can be achieved by using a softer material to connect the connecting section to the anchoring body, for example by forming a kind of hinge between the anchoring body and the connecting section with the second plastic.

In order to achieve as good a seal as possible between the fastening element and the sleeve body, in a preferred embodiment of the anchor according to the invention, a circumferential annular bead is arranged in the screw channel of the sleeve body. In particular, the annular bead is closed in the circumferential direction, that is to say formed without interruption. The annular bead locally narrows the screw channel. If the dowel is assigned a fastening element that forms a fastening system with the dowel, the annular bead narrows the screw channel, in particular to an inner diameter that is smaller than the outer diameter of the section of the fastening element which, after assembly, is systematically arranged in the area of the annular bead in the screw channel .

In a further preferred embodiment of the dowel according to the invention, a rib running in the longitudinal direction is arranged in the screw channel of the sleeve body. In particular, the rib is arranged on the connecting section, in particular on an expanding tongue, if the connecting section has one or more expanding tongues. In particular, at least one rib is then arranged on each of the expansion tongues. The rib narrows the screw channel locally and has the effect that when the fastening element is introduced, the material of the sleeve body adjoining the rib is moved radially outward. The radially outwardly directed expansion pressure with which the sealing section of the sleeve body is pressed by the connecting section against the borehole wall is thus increased by the rib. In particular, the rib extends into the expansion channel of the anchoring body, so that the rib also causes the anchoring body to expand radially when the fastening element is introduced.

It is also preferred that the anchoring body has a sleeve section closed in the longitudinal direction at its rear end. This sleeve section can be designed in such a way that, when the fastening element is introduced into the screw channel, it is radially widened, that is to say enlarged in diameter, and is thereby pressed against the borehole wall. As a result, the sleeve section can, in addition to the sealing section, lie sealingly against the borehole wall. For this purpose, the expansion channel can be designed to be narrowed in the region of the sleeve section, in particular by the ribs described above, which can then in particular extend from the sleeve body into the sleeve section of the anchoring body.

The sleeve body preferably has a shortening zone which can be compressed in the longitudinal direction and in which the connecting section does not engage. In particular, the sleeve body is also completely closed in the circumferential direction in this shortening zone. This shortening zone has the effect that the sleeve body can be compressed axially when the fastening element is inserted in the shortening zone, as a result of which the sleeve body in the shortening zone increases in diameter and thus causes additional contact of the sleeve body on the borehole wall, which further improves the sealing function of the anchor. In particular, the connecting section is designed in such a way that it is drawn into the sleeve body when a screw is screwed in and tightened and it compresses and / or spreads it radially. In particular, the connecting section has a wedge-shaped upsetting section which, when it is drawn into the sleeve body, upsets and / or spreads it and expands it in the circumferential direction. The wedge-shaped upsetting section has, in particular, a conical lateral surface which tapers towards the rear. Because the connecting section, which is made in particular from the first plastic, does not protrude into the shortening zone, it cannot hinder the axial upsetting of the sleeve body made in particular from the softer, second plastic in the shortening zone.

It is also preferred that the sleeve body has a corrugation arranged on its circumferential surface. The corrugation consists in particular of a plurality of grooves arranged axially one behind the other in the lateral surface of the sleeve body. The grooves run around the sleeve body, in particular completely, in the circumferential direction and are in particular distributed axially, in the direction of the longitudinal axis, over the entire surface area of the sleeve body. Through the corrugation the sleeve body can adapt well to unevenness in the borehole wall, which improves the sealing effect of the dowel.

In a further preferred embodiment of the anchor according to the invention, a radially protruding and circumferential collar is arranged at the rear end of the sleeve body. The collar is in particular made in one piece with the sleeve body and, in particular, is also made of the softer second plastic. The collar, which has a larger diameter than the sleeve body, serves to seal the bore hole mouth and is designed in such a way that it is pressed against an outside of an attachment with a head of a fastening element introduced into the screw channel, whereby the area between attachment and dowel, but also the area between the head and the dowel is sealed.

The anchoring body is preferably at least partially encapsulated with the second plastic and thereby connected to the sleeve body. In particular, the second plastic completely surrounds the anchoring body at least in partial sections in the circumferential direction and / or it engages behind retaining elements such as grooves or ribs that are formed on the anchoring body, so that there is an axially fixed and rotationally fixed connection between the anchoring body and the sleeve body.

The dowel according to the invention is produced in particular in a multi-component injection molding process. In particular, the anchoring body is first made from the first plastic together with the connecting section and then the sleeve body is molded on together from the second plastic, with the anchoring body being able to be overmolded with the second plastic in partial areas.

According to the invention, the anchoring body has at least one connection rib for the axially fixed and, in particular, also rotationally fixed connection of the anchoring body to the sleeve body. This connecting rib is made in particular from the first plastic of the anchoring body and overmolded with the second plastic of the sleeve body, which creates the axially fixed connection. Through this axially fixed connection, when a screw is screwed in and tightened as a fastening element, the anchoring body can be moved together with the sleeve body and the connecting section and the sleeve body with the connecting section can be compressed and / or expanded by pulling in the connecting section.

The anchor according to the invention forms a fastening system with a screw assigned to the anchor. The screw is designed in such a way that when it is screwed in, it expands the connecting section of the dowel in the radial direction. The screw has a head and a shaft, the diameter of which is greater than the inner diameter of the screw channel. In particular, the screw has a threaded section and a thread-free section, the diameter of the threaded section and / or the diameter of the thread-free section being equal to or larger than the inner diameter of the screw channel. After screwing in, the thread-free section is located, in particular, in the area of the connecting section and the sleeve body, so that the thread of the threaded section can move the connecting section with the anchoring body against the sleeve section, but does not prevent the connecting section from being drawn into the sleeve section. If the dowel has expansion legs and an expansion channel, the diameter of the shaft of the screw is selected such that the screw also expands the expansion legs when it is screwed in.

The screw of the fastening system preferably comprises a threaded section, a head, in particular a flat head or a head with an embossed washer, and a thread-free section arranged between the threaded section and the head. The diameter of the thread-free section is at least as large as, in particular greater than, the diameter of the thread core of the threaded section. In addition, the diameter of the thread-free section is not smaller than the inner diameter of the screw channel of the anchor. The inside diameter is the diameter of the narrowest point of the screw channel, for example in the area of an annular bead described above or of ribs as described above. In particular, the diameter of the thread-free section is not smaller than the inside diameter in a region of the sleeve body in which no annular bead and no rib is arranged and which has a larger inside diameter than in an area with an annular bead or the ribs.

The features and combinations of features, designs and configurations of the invention mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or drawn in a figure, are not only in the respectively specified or drawn combination, but also in any other combination Combinations or can be used individually. Embodiments of the invention are possible which do not have all the features of a dependent claim. Individual features of a claim can also be replaced by other disclosed features or Characteristic combinations are replaced. Embodiments of the invention which do not have all the features of the exemplary embodiment are possible.

The invention is explained in more detail below using an exemplary embodiment shown in the drawing.

• 1 einen erfindungsgemäßen Dübel in einer Seitenansicht;
• 2 eine Schraube als Befestigungselement für ein erfindungsgemäßes Befestigungssystem in einer Seitenansicht;
• 3 den Verankerungskörper des erfindungsgemäßen Dübels mit daran angeordneten Verbindungsabschnitt in einer perspektivischen Seitenansicht;
• 4 einen Axialschnitt durch den erfindungsgemäßen Dübel;
• 5 einen vergrößerten Schnitt durch den erfindungsgemäßen Dübel an der Stelle V-V der 4 mit Blickrichtung nach vorne in Richtung der Einbringrichtung;
• 6 den in einen Verankerungsgrund eingebrachten Dübel mit Schraube vor dem Anziehen der Schraube in einer teilweise geschnittenenSeitenansicht;
• 7 den in den Verankerungsgrund eingebrachten Dübel der 6 nach dem Anziehen der Schraube in einer teilweise geschnittenen Seitenansicht;
• 8 Detail VII der 6; und
• 9 Detail VIII der 7.

Show it:

• 1 a dowel according to the invention in a side view;
• 2 a screw as a fastening element for a fastening system according to the invention in a side view;
• 3 the anchoring body of the anchor according to the invention with the connecting portion arranged thereon in a perspective side view;
• 4th an axial section through the anchor according to the invention;
• 5 an enlarged section through the anchor according to the invention at the point VV of 4th looking forward in the direction of the insertion direction;
• 6th the dowel with screw inserted into an anchoring base before the screw is tightened in a partially sectioned side view;
• 7th the dowel inserted into the anchoring base 6th after tightening the screw in a partially sectioned side view;
• 8th Detail VII of the 6th ; and
• 9 Detail VIII of the 7th .

The one in the 1 and 3 to 5 illustrated dowel according to the invention 1 forms with the in 2 shown fastening element 2 , a screw 3 , a fastening system according to the invention, as shown in the 6th and 7th is shown.

The dowel 1 extends along a longitudinal axis L. from its rear end, passing through one in the circumferential direction U all-round collar 4th is formed, in the direction of introduction E. up to its front end, the dowel tip 5 , which is tapered for better insertion into a borehole (not shown). The dowel 1 comprises an anchor body 6th from the dowel tip 5 against the direction of introduction E. backwards to a sleeve body 7th extends, at the rear end of the collar 4th is arranged.

The in 3 anchoring body shown 6th has the dowel tip at its front end 5 on that made up of two by V-shaped connectors 8th interconnected half-shells 9 is formed. The half-shells 9 and the connectors 8th comprise a front part of a spreading channel 10 that covers the entire anchorage body 6th in the direction of the longitudinal axis L. penetrates in the middle. To the tip of the dowel 5 closes against the direction of introduction E. a spreading range 11 of the anchorage body 6th on, which consists of two spreading legs 12 is formed by a longitudinal slot 13th separated from each other and through an opening 14th are weakened in their middle part, so that the splay legs 12 can bend at a defined point to expand. The splay legs 12 comprise a central part of the screw channel 10 . Against the direction of introduction E. joins the spreading area 11 one in the circumferential direction U closed sleeve section 15th which has no opening in its peripheral wall. On this sleeve section 15th is a connecting section 16 on the anchorage body 6th Arranged in one piece, one in diameter opposite the sleeve section 15th reduced sleeve-like extension forms, with a diameter in the direction of insertion E. widening wedge-shaped upsetting section 29 on which a groove-like weakening 18th of the connection section 16 that follows between the upsetting section 29 and the sleeve section 15th lies. The anchor body 6th and the connecting portion 16 are together made of a first plastic with a Shore hardness greater than 70 (according to method D according to DIN EN ISO 868: 2003-10 ), here a polyamide, manufactured in an injection molding process.

To the anchorage body 6th closes against the direction of introduction E. the sleeve body 7th which is the connection section 16 encloses or in which the connecting section 16 protrudes and engages. The sleeve body 7th has a corrugation arranged on its peripheral surface 19th on, which consists of several arranged one behind the other in the axial direction and the sleeve body 7th in the circumferential direction U completely encircling grooves. The anchor body 6th is made of a second plastic with a Shore hardness of maximum 70 (according to method D according to DIN EN ISO 868: 2003-10 ), which is softer than the first plastic. In the exemplary embodiment, the sleeve body is 7th made of polyethylene. The sleeve body 7th forms a sealing section as a whole 28 , with which a borehole can be sealed against the ingress of water, as shown in 7th you can see.

The dowel 1 is manufactured using a two-component injection molding process, with the anchor body first 6th together with the connecting section 16 as a component that is in 3 is shown, is made from the first plastic. This component is then overmolded with the second plastic, which also causes the sleeve body 7th and the collar 4th getting produced. With the second Plastic is also used as the anchoring body 6th , especially areas between the connectors 8th and the splay legs 12 as well as connecting ribs 17th the half-shells 9 , encapsulated and filled so that the first plastic and the second plastic form a form-fitting unit and the sleeve body 7th rotationally and axially fixed with the anchoring body 6th connected is.

As in the 4th and 5 can be seen includes the sleeve body 7th a screw channel 20th , which is coaxial with the expansion channel 10 runs and merges into this. The sleeve body 7th encloses the screw channel 20th as a closed peripheral wall. In the screw channel 20th is one in the circumferential direction U circumferential ring bead 21st arranged, the screw channel 20th of a diameter D ₃ on a diameter D ₄ narrowed. The rear area of the sleeve body 7th into which the connection section 16 does not engage, since it is made of the soft second plastic, it forms a compressible shortening zone 22nd whose axial length can be shortened by upsetting. To the connecting section 16 are in the direction of the longitudinal axis L. running ribs 23 arranged from the rear end of the connecting portion 16 up to the spread area 11 and the screw channel 20th , as well as the expansion channel 10 , to a diameter D ₅ to reduce.

In the 2 illustrated screw 3 of the fastening system according to the invention also extends along the longitudinal axis L. and has a head at its rear end 27 on which is in the direction of introduction E. a thread-free, cylindrical section 24 with a diameter D ₂ connects. The head 27 has a flat bottom, the screw 3 so is a flat head screw. To the thread-free section 24 a thread section closes 25th at the front end of the screw into a screw tip 26th transforms. The threaded section 25th has a core diameter D ₁ on that's as big as the diameter D ₂ of the unthreaded section 24 is. The diameter D ₂ of the unthreaded section 24 is larger than the inner diameter D ₃ of the screw channel 20th outside the range of the ribs 23 and the ring bead 21st and also larger than the inside diameter D ₄ and D ₅ of the screw channel 20th in the area of the ribs 23 and the ring bead 21st .

As in the 6th and 7th shown is the dowel 1 for mounting an attachment, here the holder of a soap dish for a shower, initially in a drill hole 31 pushed in until the collar 4th rests flat on and around the mouth of the borehole. The borehole 31 was in the embodiment by a tile 32 , Tile glue 33 and a seal 34 through in a plasterboard 35 created. Then the screw 3 in the dowel 1 brought in. To do this, the screw 3 in the screw channel 20th and then in the expansion channel 10 screwed in. When tightening the screw 3 is before the spreading area 11 of the dowel 1 expanded in a known manner, whereby the dowel 1 is anchored in the anchorage base, the anchor body 6th together with the connecting section 16 relative to the sleeve body 7th emotional ( 6th ). This will make the sleeve body 7th compressed and expanded radially. In addition, the wedge-shaped upsetting section 29 further into the case body 7th pulled in and this spreads or widened. The thread-free section is located here 24 the screw 3 in the case body 7th and in the connection section 16 , with the screw 3 against the ribs 23 presses so that the connecting section 16 additionally in the radial direction R. , i.e. from the longitudinal axis L. away, widen, so spread open. With the connecting section 16 becomes the connecting section 16 enclosing wall of the sleeve body 7th that is the sealing section 28 forms, in the radial direction R. moved outwards and pressed against the borehole wall on which the sleeve body made of the soft second plastic 7th thus lies flat and sealingly. There the ribs 23 also in the area of the sleeve section 15th are formed, this is also additionally in the radial direction R. widened so that it is also pressed against the borehole wall and rests against it in a sealing manner. The shortening zone 22nd is also upset, causing the material of the shortening zone 22nd is pressed radially inwards and outwards so that the sleeve body is also in this area 7th as a sealing section 28 works. Through the corrugation 19th lies the sleeve body 7th even then almost over the entire surface of the borehole wall when it has unevenness, as is usually the case with boreholes in a concrete anchoring base. Through the formation of the ring bead 21st lies the sleeve body 7th in the area of the shortening zone 22nd in which the annular bead 21st is formed after screwing in the screw 3 flat sealing on the thread-free section 24 the screw 3 at. In addition, the flat underside of the attachment is located 30th Surface sealing on the collar 4th so that the collar 4th and the sleeve body 7th a seal between the dowel 1 and the screw 3 effect and no water from the outside between the attachment 30th and collar 4th through the dowel 1 can pass through into the borehole.

List of reference symbols

1

Dübel

2

Befestigungselement

3

Schraube

4

Kragen

5

Dübelspitze

6

Verankerungskörper

7

Hülsenkörper

8

Verbinder

9

Halbschale

10

Spreizkanal

11

Spreizbereich

12

Spreizschenkel

13

Längsschlitz

14

Öffnung

15

Hülsenabschnitt

16

Verbindungsabschnitt

17

Verbindungsrippe

18

Schwächung

19

Riffelung

20

Schraubkanal

21

Ringwulst

22

Verkürzungszone

23

Rippe

24

gewindefreier Abschnitt

25

Gewindeabschnitt

26

Schraubenspitze

27

Kopf

28

Abdichtabschnitt

29

keilförmiger Stauchabschnitt

30

Anbauteil

31

Bohrloch

32

Fliese

33

Fliesenkleber

34

Dichtung

35

Gipskartonplatte

D₁

Durchmesser des Gewindekerns des Gewindeabschnitts 25

D₂

Durchmesser des gewindefreien Abschnitts 24

D₃

Innendurchmesser des Schraubkanals 20 außerhalb der Rippen 23 und des Ringwulstes 21

D₄

Innendurchmesser des Schraubkanals 20 im Bereich des Ringwulstes 21

D₅

Innendurchmesser des Schraubkanals 20 im Bereich der Rippen 23

E

Einbringrichtung

L

Längsachse

R

radiale Richtung

U

Umfangsrichtung

Dowels and fastening system

1

Dowels

2

Fastener

3

screw

4th

collar

5

Dowel tip

6th

Anchorage body

7th

Sleeve body

8th

Interconnects

9

Half shell

10

Spreading channel

11

Spreading range

12

Spreader legs

13th

Longitudinal slot

14th

opening

15th

Sleeve section

16

Connection section

17th

Connecting rib

18th

weakening

19th

Corrugation

20th

Screw channel

21st

Ring bulge

22nd

Shortening zone

23

rib

24

thread-free section

25th

Threaded section

26th

Screw tip

27

head

28

Sealing section

29

wedge-shaped upsetting section

30th

Attachment

31

Borehole

32

tile

33

tile glue

34

poetry

35

Plasterboard

D ₁

Diameter of the thread core of the thread portion 25

D ₂

Diameter of the unthreaded section 24

D ₃

Inner diameter of the screw channel 20th outside the ribs 23 and the ring bead 21st

D ₄

Inner diameter of the screw channel 20th in the area of the annular bead 21

D ₅

Inner diameter of the screw channel 20th in the area of the ribs 23

E.

Direction of insertion

L.

Longitudinal axis

R.

radial direction

U

Circumferential direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 19845696 A1 [0002]

Non-patent literature cited

• DIN EN ISO 868: 2003-10 [0012, 0030, 0031]

Claims (15)

Dowel (1) with an anchoring body (6) for anchoring the dowel (1) in a borehole in an anchoring base and with a sleeve body (7) which is arranged in the insertion direction (E) behind the anchoring body (6), the sleeve body (7) has a screw channel (20) into which a fastening element (2) can be introduced, and wherein the sleeve body (7) has a sealing section (28) which surrounds the screw channel (20) in the circumferential direction (U) as a closed peripheral wall , characterized in that a connecting section (16) is arranged on the anchoring body (6) which protrudes into the sleeve body (7), is enclosed by it and which can be radially expanded by inserting the fastening element (2) into the screw channel (20) , in such a way that when the connecting section (16) is spread apart, at least part of the sealing section (28) can be moved radially outward. Dowel (1) Claim 1 , characterized in that the anchoring body (6) has at least two expansion legs (12) which comprise an expansion channel (10), the expansion legs (12) being radially expandable by inserting the fastening element (2) into the expansion channel (10). Dowel (1) Claim 1 or 2 , characterized in that the anchoring body (6) is made from a first plastic and that at least the sealing section (28), in particular the entire sleeve body (7), is made from a second plastic which is softer compared to the first plastic. Dowel (1) according to one of the Claims 1 to 3 , characterized in that the connecting section (16) has a weakening (18) running in the circumferential direction (U). Dowel (1) according to one of the Claims 1 to 4th , characterized in that an annular bead (21) running around in the circumferential direction (U) is arranged in the screw channel (20) of the sleeve body (7). Dowel (1) according to one of the Claims 1 to 5 , characterized in that a longitudinally extending rib (23) is arranged in the screw channel (20) of the sleeve body (7) and extends in particular into the expansion channel (10) of the anchoring body (6). Dowel (1) according to one of the Claims 1 to 6th , characterized in that the anchoring body (6) has a sleeve section (15) closed in the circumferential direction at its rear end. Dowel (1) according to one of the Claims 1 to 7th , characterized in that the sleeve body (7) has a shortening zone (22) which can be compressed in the longitudinal direction and in which the connecting section (16) does not engage. Dowel (1) according to one of the Claims 1 to 8th , characterized in that the sleeve body (7) has a corrugation (19) arranged on its peripheral surface. Dowel (1) according to one of the Claims 1 to 9 , characterized in that a radially protruding collar (4) extending in the circumferential direction (U) is arranged at the rear end of the sleeve body (7). Dowel (1) according to one of the Claims 1 to 10 , characterized in that the anchoring body (6) is at least partially encapsulated with the second plastic and is thereby connected to the sleeve body (7). Dowel (1) Claim 11 , characterized in that the anchoring body (6) has at least one connecting rib (17) for the axially fixed connection of the anchoring body (6) to the sleeve body (7). Dowel (1) according to one of the preceding claims, characterized in that the connecting section (16) is designed such that it is drawn into the sleeve body (7) when the fastening element (2) is inserted and tightened and it compresses and / or spreads it radially Fastening system with a dowel (1) according to one of the Claims 1 to 13th and with a screw (3) as the fastening element (2), the screw (3) being designed in such a way that when it is screwed in, it expands the connecting section (16) in the radial direction (R). Fastening system according to Claim 14 , wherein the screw (3) has a threaded section (25), a head (27) and a thread-free section (24) arranged between the threaded section (25) and the head (27), the diameter (D ₂ ) of which is at least as large as the diameter (D ₁ ) of the thread core of the threaded section (25) and not smaller than the inner diameter (D ₃ ) of the screw channel (20) of the dowel (1).

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