TWI467079B - Expansible anchor for connecting a stone panel to a concrete panel - Google Patents

Description

Telescopic anchor for connecting slate to concrete slab

The present invention relates to a telescopic anchor for attaching a slab to a concrete slab having the features previously described in the first aspect of the patent application.

The appearance of the slate-covered building is known for aesthetic reasons. For reinforcement, the slab can be attached to a concrete slab used as a slate support.

A telescopic anchor for this purpose is disclosed in European Patent No. EP 663 492 B1. In order to be anchored in a blind hole in a slate, the known telescopic anchor has a telescopic element that can be inflated by being pushed up onto the flared expansion member, and as a result the telescopic element anchors the telescopic anchor to In the slate. In a conventional manner, the expansion member of the telescopic anchor is known to be an expanded cone, that is, in the shape of a truncated cone; however, other shapes of the expansion member are also possible and possible, for example, pyramidal or even wedge-shaped expansion. component.

As the telescoping element is pushed up onto the flared expansion member, the telescoping element becomes widen out, which is referred to as expansion. Due to the expansion of the telescopic element, the telescopic anchor is anchored in the hole in the slate. Instead of pushing the telescopic element up onto the expansion member, the expansion member can also be pulled into the interior of the telescopic element, which is also considered to push the telescoping element up onto the expansion member under the terms of the present invention.

Anchoring a portion of the telescoping anchor from the slate to the concrete slab is made possible, for example, by casting concrete around the portion, and then solidifying the concrete to form a concrete slab. It is also possible to pour the material into the hole drilled in the concrete slab and fill the hole, ie the extension from the slate The anchoring anchor or some other anchoring member is chemically anchored in the concrete slab.

In order to compensate for the shrinkage of the concrete during solidification and/or the different thermal expansion of the slab and the concrete slab, it is necessary for the slab and the concrete slab to be movable relative to each other. In the case of known telescopic anchors, the ability or displacement of the slab relative to the concrete slab, its lateral or radial movement relative to the telescopic anchor, is achieved by means of a plastic sleeve, the plastic sleeve In the region from the transition of the slate to the concrete slab, the telescopic anchor is wrapped and extends a certain distance into the slab and also extends a specific distance into the concrete slab. The plastic sleeve of the known telescopic anchor can be placed on the telescopic anchor only after the telescopic element has been pushed up to the expansion member, ie after the expansion of the telescopic element and thus after anchoring the telescopic anchor in the slate In the right place.

The problem underlying the present invention is to propose a telescopic anchor of the kind described above which allows the displaceability of the slab relative to the concrete slab to which the slab is attached, without the need to anchor the concrete after anchoring the telescopic anchor to the slab A cover is assembled to the telescopic anchor at the transition from the board to the slate.

According to the invention, this problem is solved by the features of claim 1 of the scope of the patent application. The telescopic anchor according to the invention has a force transfer element by means of which the force of pushing the telescopic element up onto the expansion member can be transferred. The force required for expansion can be transferred to the telescopic element by means of the force transfer element accordingly. The force transfer element is stiffer in the direction of force transfer than in the direction of the transfer. The direction of force transfer is to push the telescopic element up to the expansion member, that is, the direction required for expansion. In this direction, the force transfer element is required to have the greatest possible rigidity. Crossing this direction, the slab must be displaceable relative to the concrete slab by means of the lower rigidity of the force transfer element in this direction or in the directions. The telescopic element may be elastically and/or plastically deformable across the direction of force transfer. As in the case of known telescopic anchors, the force transfer element of the telescopic anchor according to the invention may be a sleeve, but it has (substantially) greater rigidity in the direction of force transfer, ie in the casing The longitudinal direction or the axial direction is greater in rigidity than in the direction or the radial direction. The invention has the advantage that the telescopic element can be pushed up onto the expansion part by means of the force transfer element and thus expands, and the force transfer element does not need to be removed after expansion and replaced by the elastic element, but rather allows the slate to be opposed to The necessary displacement of the concrete slab.

In a preferred embodiment of the invention, the telescoping anchor is an undercut anchor that can be anchored in the slab by interlocking connections due to expansion of the telescopic element in an undercut hole. The invention does not exclude connections based on additional forces in the slate. Moreover, the invention does not in principle exclude a force-based connection in a non-undercut borehole. Undercut anchors have the advantage of a chain connection.

In an embodiment of the invention, the telescoping anchor has an expansion member attached to the same handle. The handle and the expansion member can be one piece. It is also possible that the shank is connected to the expansion member, for example with a screw. The force transfer element has a through hole through which the shank of the telescopic anchor extends. The force transfer element can be displaced on the handle. It can be in frictional contact with the handle. One embodiment of such a force transfer element is the sleeve already mentioned.

In an embodiment of the invention, the force transfer element has a cylindrical envelope. As a result, the force transfer element matches the cylindrical hole in the slate. The "envelope" does not necessarily mean a continuous cylindrical outer surface; rather, the peripheral surface of the force transfer element may have a recess. However, the present invention does not exclude a force transfer element having a cylindrical outer surface.

The force transfer element can be achieved, for example, by a material having a heterogeneous material property, i.e., in a direction more rigid than in a direction transverse to the direction, in the direction of force transfer than in the direction Great rigidity.

In the example of the invention, the different stiffness in the direction of force transfer and across the direction is achieved by the shape of the force transfer element. For this purpose, the force transfer element can have a recess that extends in the direction of force transfer. It may have ribs and/or ridges that extend in the direction of force transfer. The force transfer element may have a void bounded by ribs and/or ridges, or a rib extending, for example, in a chordwise direction or in a spiral shape, and extending in the direction of the force transfer of the force transfer element. . This list is not exhaustive.

In another embodiment of the invention, the force transfer element can be provided with a reinforcement to cause greater rigidity in the force transfer direction than in the direction of the force transfer. For this purpose, the force transfer element can for example be a tubular reinforcing element surrounded by a plastic material, such as a steel tube. As a result, a high degree of rigidity can be achieved in the longitudinal or axial direction, so that the telescopic element can be pushed up onto the expansion member. Radially, the force transfer element can be plastically and/or elastically deformed by the plastic material. Moreover, it is embedded in plastic materials and oriented to function A pin, plate or the like, for example in the direction of force transfer, can form a reinforcing element for force transfer for pushing the telescopic element up onto the expansion member. This list is not exhaustive.

In an example of the invention, the telescoping anchor has recessed elements for undercut joints in the concrete slab. The recessed elements cause a chain connection and can therefore be well held in the concrete slab. In addition, anchoring in concrete slabs can be achieved by means of force-based and/or material-based connections. The recessed element may be the result of an external thread, a transverse head, a laterally projecting protrusion or a barb element or a wavy, helical, hooked or angular shaped handle. The list of possibilities for recessed components is not exhaustive.

The telescoping element can be an expansion sleeve that does not have a crack or that is divided into an expansion tongue by a crack. In an example, a ring having a wavy shape in the peripheral direction is provided as a telescopic element. Such a ring having a corrugated shape as a telescopic element has the advantage of a short anchoring depth, thus allowing anchoring in a thin slate. Another advantage is the low expansion force but still good anchoring in the undercut hole.

In the example of the invention, in order to obtain the ability to move in the transverse or radial direction, a screw connection is provided; the telescopic anchor thus has at least two portions. It has a concrete anchor that can be anchored in the concrete slab, is part of the telescopic anchor and can be connected by means of a screw connection or by means of a screw connection to a portion of the telescopic anchor having an expansion component. The screw connection exhibits a play that appears in the radial direction. As a result, the expansion member, that is, the portion of the telescopic anchor anchored in the slate, can be positioned in the lateral or radial direction relative to the concrete anchor, that is, the portion of the telescopic anchor anchored in the concrete slab. shift. By this means, the displacement of the slab relative to the concrete slab can be achieved.

In an embodiment of the invention, a deformable covering is provided which covers the telescopic anchor against the concrete in the transition region from the concrete slab to the slate. The cover can be, for example, a surrounding baffle. In an embodiment of the invention, the force transfer element can comprise a deformable cover. The deformable covering maintains the telescoping anchor from interference with the concrete adjacent to the slate to ensure the displacement of the slate relative to the concrete slab.

In an embodiment of the invention, the force transfer element is provided with a bite configuration that snaps into place when the force transfer element has pushed the telescoping element up onto the expansion member. In one aspect, the snap fit configuration provides the possibility to check if the telescoping element has expanded as desired. On the other hand, after expansion, that is, after anchoring the telescopic anchor in the slate, the occlusal configuration holds the force transfer element.

Further features of the present invention will appear from the description of the following examples in conjunction with the appended claims. The individual features can be implemented in each case individually or in any combination in the examples of the invention.

The telescopic anchor 1 according to the invention shown in Figure 1 has a shank 2 having a conical expansion member 3 flared outwardly in a direction away from the shank 2 at one end. It is not mandatory that the expansion member 3 has a conical shape. A telescopic element 4 is disposed on the telescopic anchor 1, which in the embodiment of this embodiment is in the form of a ring having a wavy shape in the peripheral direction. The telescopic element 4 can be pushed up from the handle 2 onto the flared expansion member 3, and in the process Will be inflated, called swelling. The telescopic anchor 1 can thus be anchored in the undercut blind hole 5, which in the illustrated embodiment has a conical widening that forms an undercut. The blind hole 5 is provided in a slab 6, such as a natural stone slab, which is used to cover the appearance of a building (not shown) or some other structure. The shank 2 projects into the concrete slab 7 and is anchored in the concrete slab 7 in a chain and/or material based connection. A nut 8 for anchoring in the concrete slab 7 is screwed to the end of the shank 2 away from the expansion member 3. The concrete forming the concrete slab 7 has been cast on the slab 6 around the shank 2 anchored in the slab 6 by the telescopic anchor 1. A plastic film 9 as a separating layer is disposed between the concrete slab 7 and the slab 6, which allows the two plates 6, 7 to be displaced relative to each other.

The telescopic anchor 1 has a force transfer element 10 which is disposed in the blind hole 5 of the slate 6 adjacent to the telescopic element 4 and the expansion member 3. The force transfer element 10 is displaceable on the handle 2. In this embodiment of an embodiment, the force transfer element 10 is annular or sleeve shaped. In the direction of the force transfer, that is, in the axial direction, it has a greater rigidity than in the radial direction, that is, across the direction of the force transfer. The force transfer element 10 is made of a plastic material; it can be elastically deformed in the radial direction and may also be plastically deformed. In the axial direction, it has sufficient rigidity as mentioned to push the telescopic element 4 up onto the expansion member 3, that is, the force for expansion of the telescopic element 4, by means of the force transfer element 10 is transferred to the telescopic element 4.

The force transfer element 10 can be achieved by means of a heterogeneous material in the direction of force transfer and across the transfer direction, ie in the axial and radial directions. In the direction of rigidity, the material has greater mechanical rigidity in a preferred direction, i.e., in the axial direction than across the direction. Other possibilities for obtaining different stiffnesses in the direction of force transfer and in the direction of force transfer are provided by shape and/or by different materials of two or more different stiffnesses. Figures 2, 4, 6, and 7 show embodiments in which different stiffness is obtained by the shape of the force transfer element 10; Figures 3 and 5 show embodiments of different materials.

The force transfer member 10 shown in Fig. 2 is a ring or sleeve having a cylindrical center hole 11 and a periphery 12 having a wavy shape in the peripheral direction. Due to the wavy shape, the force transfer member 10 has a recess continuous in the longitudinal direction on its periphery, whereby the rigidity in the radial direction is reduced as needed.

The force transfer element 10 of Figure 4 has a short tube shape with a washer-like flange 13 at one end. In use, the flange 13 tightly seals the opening of the blind hole 5 in the slate 6. The flange 13 is elastically deformable so that the required capacity of the telescopic anchor 1 to move in the radial direction in the slab 6 can be ensured. The tubular portion of the force transfer element 10 of Figure 4 is sufficiently rigid for the expansion force that can be transferred to the telescoping member 4.

The force transfer element 10 shown in Figure 6 has a sleeve from which the rib 14 projects helically. The ribs 14 are continuous in the longitudinal direction; in the transverse direction, that is, in the radial direction of the force transfer member 10, they can be deformed with a small force. In the longitudinal direction, i.e., in the force transfer or axially parallel direction, the sleeve and rib 14 of the force transfer element 10 both transfer forces for expansion of the telescopic element 4. The ribs 14 can also project radially or tangentially (not shown) rather than spirally.

In Fig. 7, the force transfer element 10 has a disc-like lip 15 in a radial plane, which can be elastically deformed like a sealing lip, so that the force transfer element 10 has a low radial direction rigidity. In the axial direction, the force transfer element 10 is rigid due to the shape of the sleeve at its center. The force transfer elements of Figures 2, 4, 6, and 7 are made of a plastic material.

In Figure 3, the force transfer element 10 comprises a sleeve 16 made of steel that is sheathed in a plastic material. This force transfer element 10 is rigid in the axial direction, that is, in the direction of force transfer due to the steel sleeve 16, and is deformable in the radial direction due to the plastic sheath.

In Fig. 5, the force transfer member 10 is also sleeve-shaped and made of a plastic material. The steel pins 17 are embedded in the plastic material in a reinforced manner; they are arranged axially in parallel around the central hole of the force transfer element 10 and pass through the force transfer element 10 in the longitudinal direction. The steel pin 17 causes a desired degree of high rigidity in the axial direction, that is, in the direction of the force transfer.

Returning to Figure 1, the telescopic element 4 can be pushed up onto the expansion member 3 by means of the force transfer element 10 as already mentioned and thus expand, and the telescopic anchor 1 can be anchored in the slab 6 in this way. Undercut blind hole 5. The relatively low stiffness of the force transfer element in the lateral or radial direction provides the telescoping anchor 1 with the ability to move in the radial direction. As a result, the slate 6 can be displaced relative to the concrete slab 7, making it possible to compensate for shrinkage or two of the concrete when it is cured. The different thermal expansion of the plates 6, 7. In order to connect the slab 6 to the concrete slab 7, some of the telescopic anchors 1 may be distributed over the area of the slab 6 and anchored therein, and the concrete forming the concrete slab 7 is cast around them. The concrete slab 7 forms a support for the slate 6. The two sheets 6, 7 together form a laminated composite panel for coating the appearance. The two plates 6, 7 are connected to each other by means of a telescopic anchor 1 at a point of distribution distributed over the area of the slate 6. As already stated, the telescopic anchor 1 allows the two plates 6, 7 to be displaced relative to one another.

In Fig. 8, the telescopic anchor 1 has a conical expansion member 3 having a shank 2 as in Fig. 1, however, the shank 2 is shorter than the shank of Fig. 1 and is provided with external threads 28. The telescopic element 4 in Fig. 8 is a ring which has a wavy shape in the peripheral direction as shown in Fig. 1 and which can be expanded or expanded by being pushed up onto the expansion member 3. As a result, the telescopic anchor 1 is anchored in the undercut blind hole 5 in the slate 6. A sleeve 18 made of, for example, steel is mounted on the shank 2 of the telescopic anchor 1 of FIG. 8 adjacent to the expansion member 3, by means of which the telescopic element 4 can be pushed up onto the expansion member 3 and thus And swell. The sleeve 18 is located in the blind hole 5 in the slate 6. In Fig. 8, the force transfer element 10 is located in the force transfer direction, that is, in the axial direction, more rigidly than the direction of the force transfer, that is, in the radial direction. In the concrete slab 7. The force transfer element 10 can be constructed as described above and shown in Figures 2-7. In this embodiment of the embodiment, it is washer-like and is disposed on the plastic film 9 separating the slab 6 from the concrete slab 7.

The concrete anchor 19 is threaded onto the external thread 28 of the shank 2, which has an axial blind bore 20 having an internal thread 21. There is a play between the internal thread 21 and the external thread 28 of the shank 2; the two threads 28, 21 are formed in the diameter A screw connection that reveals the play in the direction. Due to the play in the screw connections 28, 21 and the radial deformability of the force transfer element 10, the required displacement of the two plates 6, 7 relative to one another is again ensured. The concrete anchor 19 is in the shape of a screw and has a head 22 for anchoring it in the concrete slab 7.

Like the telescopic anchor 1 of Fig. 1, the telescopic anchor 1 of Fig. 9 has a shank 2 with a flared expansion member 3 at one end. The telescopic element 4, which in FIG. 9 is again again a ring having a corrugated shape in the peripheral direction, can be pushed up onto the expansion member 3 and thus expanded to anchor the telescopic anchor 1 to the undercut blind hole in the slate 6. 5 in. Adjacent to the expansion member 3, the shank 2 has a cylindrical portion 23 that extends from the blind hole 5 in the slab 6 and into the concrete slab 7. The shank 2 then has a transition to the helical portion 24, which is anchored in the concrete slab 7 in a chain and material-based connection. At the transition from the cylindrical portion 23 to the helical portion 24, the shank 2 has a circumferential groove 25.

The force transfer element 10 is sleeve-shaped and extends beyond the length of the cylindrical portion 23 of the shank 2. As described, it is highly rigid in the axial direction, so that the telescopic element 4 can be pushed up onto the expansion member 3 by means of the force transfer element 10 and thus expand. In the radial direction, the force transfer element 10 is resilient so as to ensure the required movement in the transverse direction to allow displacement of the slab 6 relative to the concrete slab 7. Different from Fig. 1, wherein the force transfer element 10 is located in the slate 6, and unlike Fig. 8, wherein the force transfer element 10 is located in the concrete slab 7, the force transfer element 10 in Fig. 9 extends into the slab 6 and the concrete slab 7 in between.

At the end remote from the expansion member 3, the force transfer member 10 has a surrounding baffle 26 which, when viewed from the side of the concrete slab 7, is concavely curved toward the outside and extends toward the slate 6. The baffle 26 is located on the plastic film 9 separating the slab 6 from the concrete slab 7. The baffle 26 forms a covering and prevents the concrete from reaching the telescopic anchor 1 in the interface region between the slab 6 and the concrete slab 7. This ensures the ability to move in the radial direction, i.e. the desired displacement of the slab 6 relative to the concrete slab 7.

The force transfer element 10 has a circumferential bead 27 which engages in the groove 25 of the shank 2 when the telescopic element 4 has been pushed up onto the expansion member 3 by means of the force transfer element 10 and thus expands. The proper location. The groove 25 forms a snap-fit configuration with the beads 27.

1‧‧‧ Telescopic anchor

2‧‧‧ handle

3‧‧‧Expanding parts

4‧‧‧ Telescopic components

5‧‧‧Blind hole

6‧‧‧Slate

7‧‧‧Concrete slab

8‧‧‧ nuts

9‧‧‧Plastic film

10‧‧‧force transfer element

11‧‧‧ center hole

12‧‧‧ ripple

13‧‧‧Flange

14‧‧‧ ribs

15‧‧‧ lip

16‧‧‧ casing

17‧‧‧Steel

18‧‧‧ casing

19‧‧‧ concrete anchor

20‧‧‧Blind holes

21‧‧‧ internal thread

22‧‧‧ head

23‧‧‧Cylinder part

24‧‧‧Spiral handle part

25‧‧‧ Groove

26‧‧‧Baffle

27‧‧‧ beads

28‧‧‧ external thread

Figure 1 illustrates a telescopic anchor in accordance with the present invention; Figures 2 through 7 show different configurations of the force transfer elements of the telescopic anchor of Figure 1 in accordance with the present invention; and Figures 8 through 9 illustrate two additional examples of a telescopic anchor in accordance with the present invention. .

1‧‧‧ Telescopic anchor

2‧‧‧ handle

3‧‧‧Expanding parts

4‧‧‧ Telescopic components

5‧‧‧Blind hole

6‧‧‧Slate

7‧‧‧Concrete slab

8‧‧‧ nuts

9‧‧‧Plastic film

10‧‧‧force transfer element

Claims (10)

A telescopic anchor for attaching a slab (6) to a concrete slab (7), wherein the telescopic anchor (1) has a telescopic element (4) configured to be pushed up by Expanded on an open expansion member (3), characterized in that the telescopic anchor (1) has a force transfer element (10) by means of which the transfer element (10) can be transferred a force for pushing the telescopic element (4) up onto the expansion member (3), and the force transfer element (10) is transverse to the action in the force transfer direction due to its shape The direction of force transfer is more rigid. A telescopic anchor according to claim 1 is characterized in that the telescopic anchor (1) is an undercut anchor. The telescopic anchor according to claim 1 is characterized in that the expansion member (3) has a handle (2), and the force transfer member (10) has a through hole (11), and the handle (2) is Extending through the through hole (11), the force transfer element (10) is displaceable on the handle (2). A telescopic anchor according to claim 1 is characterized in that the force transfer element (10) has a cylindrical envelope. A telescopic anchor according to claim 1 is characterized in that the force transfer element (10) has at least one reinforcing element (16; 17), which element is transverse to the direction in the direction of the force transfer. More rigid. A telescopic anchor according to claim 1 is characterized in that the telescopic anchor (1) has a recessed element (8; 22; 24) for the undercut into the concrete slab (7). A telescopic anchor according to claim 1 is characterized in that the telescopic element (4) is a ring having a wavy shape in the peripheral direction. A telescopic anchor according to claim 1 is characterized in that the telescopic anchor (1) has a screw connection (28) that connects it to a concrete anchor (19) anchorable in the concrete slab (7). 21), and in that the screw connection portion (28, 21) exhibits a play in the radial direction. A telescopic anchor according to claim 1 is characterized in that the telescopic anchor (1) has a deformable covering (26) which is abutted against the concrete slab (7) The concrete in the transition zone of the slate (6) covers the telescopic anchor (1). A telescopic anchor according to claim 1 is characterized in that the telescopic anchor (1) has a bite configuration (25, 27) for the force transfer element (10), when the force transfer element (10) has When the telescopic element (4) is pushed up onto the expansion member (3), the engagement arrangement (25, 27) is engaged in position.