Setting tool for setting an insulating dowel

Abstract

The invention proposes a setting tool (1) for an insulation anchor (2) with an adjusting element (11) that can be rotated manually to adjust an axial offset of an abutment (10) relative to a pressure piece (9). To countersink a retaining plate (5) of the insulation anchor (2) in an insulation board, the pressure piece (9) is adjusted to a position projecting axially relative to the abutment (10). When the pressure piece (9) is flush with the abutment (10), the retaining plate (5) is set flush with the surface of the insulation board.

Description

[0001] The invention relates to a setting tool for setting an insulation anchor with the features of the preamble of claim 1.

[0002] Insulation anchors are known that feature a disc-shaped retaining plate that is attached to a building wall with a fastening screw through an insulation board. The retaining plate is either countersunk into the insulation board and then covered with a washer, or the retaining plate is placed flush with the surface of the insulation board. The washer is a disc of insulation material that is the same size as, or slightly larger than, the retaining plate. Insulation boards, for example, are made of foamed plastic and are usually part of an external thermal insulation composite system (ETICS) for insulating a building.

[0003] From EP 2 786 840 A2 a setting tool according to the preamble of claim 1 is known.

[0004] Patent application EP 3 978 194 A1 discloses a setting tool for fastening such an insulation anchor, optionally with a countersunk or flush-mounted retaining plate. The known setting tool has a circular perforated disc-shaped abutment that stops the axial movement of the setting tool by placing it on an insulation board, and a pressure piece that protrudes axially through a center hole of the abutment and countersunk the retaining plate of the insulation anchor into the insulation board. If the pressure piece is removed, which requires remodeling the setting tool, the retaining plate is placed flush with the insulation board.

[0005] The object of the invention is to propose a setting tool for an insulation anchor which has a simple adjustment option for setting the insulation anchor either with a countersunk or surface-flush holding plate.

[0006] This object is achieved according to the invention by a setting tool having the features of claim 1. The setting tool according to the invention comprises a drive shaft with a rotational axis for transmitting rotation of a rotary drive tool to a fastening screw of an insulation anchor, a pressure piece for transmitting a compressive force to a retaining plate of the insulation anchor, and an abutment radially outside the pressure piece. When setting an insulation anchor, the abutment rests against the insulation panel to be fastened at the end of the setting process, thereby stopping any axial movement of the setting tool. The rotary drive tool is, for example, a cordless or pneumatic screwdriver or a drill.

[0007] A rear end of the drive shaft is clamped, for example, into a jaw chuck of the rotary drive tool or inserted into a quick-release coupling of the rotary drive tool for axial and rotational security. A front end of the drive shaft is designed for a positive-locking, rotationally secure attachment to or in a tool seat of the fastening screw. It has, for example, a bit holder with a screw bit corresponding to the tool seat. The tool seat can be, for example, an internal star, internal or external triangular, square, or hexagonal head, a slotted or Phillips head; this list is not exhaustive.

[0008] The pressure piece has, for example, a front surface that is radial to the axis of rotation, i.e., in a radial plane to the axis of rotation, as a pressure surface. This front surface comes into contact with the retaining plate of the insulation anchor during axial advance of the setting tool for setting the insulation anchor and transfers an axial compressive force from the setting tool to the retaining plate for axial advance of the insulation anchor. "Setting" the insulation anchor here refers to the fastening of the retaining plate of the insulation anchor flush with or countersunk into the outer side of an insulation board with the fastening screw through the insulation board in a building wall. The insulation board is or will be arranged adjacent to the building wall and fastened to the building wall with several insulation anchors. The outer side of the insulation board is the side of the insulation board facing away from the building wall.

[0009] The abutment is arranged radially outside the pressure piece, in particular, it encloses the pressure piece, particularly in the form of a circular ring. At the end of the installation process, the abutment rests against the insulation board and thus stops the axial advance of the installation tool, i.e., when the abutment rests on the outer side of the insulation board. This means that the advance of the installation tool ends when the abutment of the installation tool rests on the outer side of the insulation board.

[0010] Furthermore, the setting tool according to the invention has an adjusting element that can be manually moved relative to the drive shaft, with which an axial offset of the pressure piece relative to the abutment can be set or adjusted. The axial offset between the abutment and the pressure piece can be selected such that, after the end of the setting process, i.e., when the abutment of the setting tool has rested on the insulation board, the retaining plate of the insulation anchor is either countersunk into the insulation board or flush with the surface of the insulation board. More than two settings of the axial offset between the abutment and the pressure piece are possible, in particular several positions for countersinking at different depths in the insulation. "Flush with the surface" here means that the retaining plate rests on or is flush with the outside of the insulation board.

[0011] "Manually movable" means the actuating element can be moved to adjust the axial offset between the abutment and the pressure piece without the setting tool having to be disassembled and / or dismantled into parts using a tool or by other means. Manual movement does not, in principle, preclude adjustment using a tool, provided the tool is used to adjust the axial offset and not to disassemble the tool or remove parts of the tool. In particular, the actuating element is rotatable relative to the drive shaft, preferably about the rotation axis, and generates an axial movement between the abutment and the pressure piece through this rotation.

[0012] An advantage of the invention is the simple and quick adjustment option between flush and countersunk setting of the retaining plate by hand, without having to modify or disassemble the setting tool, which regularly requires additional tools.

[0013] The subclaims relate to advantageous embodiments and further developments of the invention.

[0014] One embodiment of the invention provides that the adjusting element has two end positions. In a first end position, the abutment and the pressure piece have an axial offset such that the holding plate of the insulation anchor is countersunk into the insulation board when the abutment of the setting tool rests on the outside of the insulation board. In a second end position of the adjusting element, the abutment and the pressure piece are flush with one another, i.e., they have no axial offset, or they have such a small axial offset that the holding plate of the insulation anchor is still flush with the outside of the insulation board when the abutment rests on the outside of the insulation board. The assignment of the first and second end positions of the insulation holder is arbitrary and could also be assigned conversely to the countersunk and flush setting of the holding plate.

[0015] One embodiment of the invention provides that the adjusting element for adjusting the axial offset of the abutment to the thrust piece is rotatable about the rotation axis relative to the thrust piece and, upon rotation, moves the thrust piece axially relative to the abutment. This is possible, for example, with a helical gear, whereby a rotational mobility of less than a full turn, for example a quarter, third, or half turn, i.e., a rotation of 90°, 120°, or 180°, is sufficient to adjust the retaining plate between the countersunk and the surface-flush position in embodiments of the invention.

[0016] One embodiment of the invention provides a cam control for generating the axial movement of the pressure piece in relation to the abutment from the movement, in particular from the rotation of the actuating element.

[0017] The cam control system, for example, has a helical control cam coaxial with the rotational axis, with a constant or varying pitch, which converts the rotation of the actuating element into an axial movement, similar to a helical gear, which moves the pressure piece axially relative to the abutment. The cam control system can also have several helical control cams used simultaneously, particularly with the same shape, for example, several helices offset in the circumferential direction.

[0018] One or more sections of the control cam without a gradient are possible. In particular, one or both end positions of the control element can be assigned to one or two sections of the control cam without a gradient. The sections of the control cam without a gradient ensure a stable position against unwanted axial movement. The control cam can also have one or more sections without a gradient between the end positions, which, for example, allow for different axial offsets between the abutment and the thrust piece, thus allowing the retaining plate to be countersunk to different depths.

[0019] One embodiment of the invention provides a flange that encloses the pressure piece and is axially movable relative to the pressure piece as an abutment. In this embodiment of the invention, the flange is a perforated disc with the pressure piece located in its center hole. Windows, i.e., openings, holes, cutouts, recesses, or the like in the flange improve visibility of the retaining plate of the insulation anchor and of a screw head of the fastening screw of the insulation anchor for positioning the drive shaft of the setting tool according to the invention at the tool seat of the fastening screw and when setting the insulation anchor. Such windows in the abutment are advantageous but not essential for the invention.

[0020] A preferred embodiment of the invention provides a slot as a control cam or as part of the control cam of the cam control for adjusting and setting the axial offset between the abutment and the pressure piece. The slot is located in a peripheral wall of the tubular pressure piece and has a pitch relative to the rotational axis of the setting tool according to the invention. The pitch can vary, and the slot can have one or more sections without a pitch.

[0021] The setting tool according to the invention forms a fastening system with an associated insulation dowel.

[0022] The features and combinations of features, embodiments, 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 illustrated in a figure, can be used not only in the respective combinations indicated or illustrated, but also in any other combinations or individually. The invention is defined by the appended claims.

[0023] The invention is explained in more detail below using an exemplary embodiment illustrated in the drawing. In the drawings: Figure 1 shows a side view of a setting tool according to the invention in a "recessed position"; Figure 2 shows the setting tool from Figure 1 in a "flush position"; Figure 3 shows an axial section of the setting tool from Figures 1 and 2 in the "sinking position" according to Figure 1 ; and Figure 4 a side view of an insulation anchor.

[0024] The setting tool 1 according to the invention shown in the drawing is intended for an optionally countersunk or surface-flush setting of an insulation anchor 2, the Figure 4 The setting tool 1 and the insulation anchor 2 together form a fastening system.

[0025] The insulation dowel 2 has a tubular hollow shaft 3, an expansion dowel 4 at one end, and a circular disk-shaped retaining plate 5 at another end of the hollow shaft 3. The insulation dowel 2 is used to attach an insulation board (not shown), made of, for example, a solid foam, to a building wall (also not shown), which serves as the anchoring base. For attachment, the insulation dowel 2, with the expansion dowel 4 leading, is inserted through the insulation board into an anchor hole in the building wall until the retaining plate 5 either rests on an outer side of the insulation board facing away from the building wall, or the retaining plate 5 is countersunk into the insulation board in such a way that a washer of insulation the size of the retaining plate 5 can be placed in a countersink on the retaining plate 5.If the retaining plate 5 rests on the outside of the insulation board, this is referred to as a flush setting of the insulation anchor 2 or its retaining plate 5. A fastening screw 6 screwed through the hollow shaft 3 into the expansion anchor 4 expands the expansion anchor 4 in the building wall and anchors the insulation anchor 2.

[0026] Depending on the substrate, the expansion anchor 4 may not be absolutely necessary. For example, if the building wall is made of wood, the hollow shaft 3 can be used without the expansion anchor 4 and the fastening screw 6 can be screwed directly into the building wall as the anchoring base.

[0027] The setting tool 1 according to the invention serves for setting the insulation dowel 2 either countersunk or flush with the surface, whereby "setting" means the fastening of the insulation board with the insulation dowel 2 as explained above.

[0028] The setting tool 1 has a drive shaft 8 with a rotation axis 7, a pressure piece 9, an abutment 10 and an adjusting element 11, wherein in the exemplary embodiment the rotation axis 7 of the drive shaft 8, the pressure piece 9, the abutment 10 and the adjusting element 11 are coaxial.

[0029] The drive shaft 8, which axially penetrates the setting tool 1, transmits a rotary movement from a rotary drive tool (not shown), such as a cordless screwdriver, to the fastening screw 6. For this purpose, a rear end of the drive shaft 8 is designed for clamping in a jaw chuck of the rotary drive tool or for rotationally fixed and axially pressure-tight insertion into a quick-clamping device of the rotary drive tool. In the exemplary embodiment, the rear end of the drive shaft 8 has a hexagon 12. A front end 13 of the drive shaft 8 is designed for rotationally fixed engagement by form-fitting engagement on or in a tool seat on or in a screw head 14 of the fastening screw 6. In the exemplary embodiment, the screw head 14 has an internal star. The front end of the drive shaft 8 has a matching star-shaped design. Other possibilities are a hexagon, a transverse slot, or a Phillips slot.This list is exemplary and not exhaustive. Alternatively, a bit holder with a bit that fits the tool seat of screw 6 would be possible.

[0030] In the exemplary embodiment of the setting tool 1 according to the invention, the pressure piece 9 has a hollow cylinder with a perforated disk-shaped end wall 15 at a front end, into which the drive shaft 8 is screwed for connection, such that the front end 13 of the drive shaft 8 protrudes from the end wall 15. The drive shaft 8 and the pressure piece 9 are rotationally and axially fixed after screwing. Due to its hollow cylindrical shape, the pressure piece 9 can be considered tubular. A screw connection between the drive shaft 8 and the pressure piece 9 is not absolutely necessary. Alternatively, the drive shaft 8 and the pressure piece 9 could be welded, glued, or formed into one piece. Instead of a rotationally fixed connection, the pressure piece 9 could also be rotatable relative to the drive shaft 8.

[0031] The adjusting element 11 is arranged on the hollow cylindrical pressure piece 9 so as to be rotatable about the rotation axis 7. In the exemplary embodiment, the adjusting element 11 is cylindrical and coaxially encloses the pressure piece 9.

[0032] In the exemplary embodiment, the abutment 10 has a perforated disk that is axially fixed to a front end, i.e., the front end of the adjusting element 11, which is closer to the front end 13 of the drive shaft 8 than to the rear end of the drive shaft 8. The abutment 10 has windows 16, i.e., openings, holes, cutouts, recesses, or the like, through which a view, or a better view, from a rear side of the setting tool 1 to the front end 13 of the drive shaft 8 is possible. The abutment 10 can also be understood as a flange in a radial plane of the rotation axis 7, which encloses the pressure piece 9. In the exemplary embodiment, the abutment 10 is axially fixed to the adjusting element 11. The abutment 10 enclosing the pressure piece 9 is located radially outside the pressure piece 9.

[0033] The abutment 10 is manually adjustable axially relative to the pressure piece 9 in order to position the insulation anchor 2 either with the retaining plate 5 recessed into the insulation board or flush with the surface. This means that an axial offset of the abutment 10 relative to the pressure piece 9 can be manually adjusted by simply rotating the adjusting element 11 about the drive shaft 8 or the rotation axis 7. In the exemplary embodiment, the abutment 10 is axially adjusted by rotating the adjusting element 11 on the pressure piece 9 or generally relative to the pressure piece 9.

[0034] For adjusting or setting the axial offset of the abutment 10 in relation to the pressure piece 9, the setting tool 1 according to the invention in the exemplary embodiment has a cam control 17 with a control cam 18, which in Figures 1 and 2is drawn with dashed lines. In the exemplary embodiment, the control cam 18 is a helical groove in the outer circumference of the pressure piece 9, coaxial with the axis of rotation 7. "Helical" means that the groove or the control cam 18 has a pitch. In the exemplary embodiment, the control cam 18 has a constant pitch, but this is not mandatory for the invention. A front or radially inner end of a stud screw 19 engages the control cam 18. The stud screw 19 is screwed radially to the axis of rotation 7 through a peripheral wall of the cylindrical tubular adjusting element 11 and has a threadless section at its front end, which engages the control cam 18 of the adjusting element 11. The threadless section at the front end of the stud screw 19 can also be considered a stud.The pin screw 19 is part of the cam control 17 for adjusting or setting the axial offset of the abutment 10 in relation to the pressure piece 9.

[0035] A rotation of the adjusting element 11 on the pressure piece 9 and thus a rotation of the adjusting element 11 in relation to the drive shaft 8 generates the axial movement of the abutment 10, which in the exemplary embodiment is axially fixed to the adjusting element 11, in relation to the pressure piece 9 via the cam control 17. In this way, the axial offset of the abutment 10 in relation to the pressure piece 9 can be set or adjusted by manually rotating the adjusting element 11. The abutment 10 can be set between a Figure 1 shown position, in which the pressure piece 9 projects axially on the front side relative to the abutment 10, and a position in Figure 2shown position, in which the abutment 10 is flush with the front end of the pressure piece 9. The axially protruding position of the pressure piece 9 with respect to the abutment 10 is associated with countersunk installation, and the position of the pressure piece 9 flush with the abutment 10 is associated with the surface-flush installation of the retaining plate 5 of the insulation anchor 2.

[0036] At the end of the control cam 18, into which the pin screw 19 engages when the pressure piece 9 protrudes axially relative to the abutment 10, the control cam 18 has a short section without a pitch in order to avoid an unwanted axial movement of the pressure piece 9 protruding relative to the abutment 10.

[0037] The two ends of the control curve 19 define two axial end positions of the abutment 10 in relation to the pressure piece 9 and thus two axial offset positions of the abutment 10 in relation to the pressure piece 9.

[0038] To install the insulation anchor 2, the insulation anchor 2, with its expansion anchor 4 leading, is inserted through the insulation board (not shown) into the anchor hole in the building wall (also not shown), until the retaining plate 5 of the insulation anchor 2 rests on the outside of the insulation board. The installation tool 1 according to the invention is applied to the insulation anchor 2 such that the front end 13 of the drive shaft 8 engages the tool seat in the screw head 14 of the fastening screw 6. The installation tool 1 is driven in rotation, with its drive shaft 8 transmitting the rotation to the fastening screw 6, which is screwed into the expansion anchor 4, expands it, and thereby anchors the insulation anchor 2 in the building wall.

[0039] The pressure piece 9 rotates with the drive shaft 8 and drives the retaining plate 5 of the insulation anchor 2 via pins 20, which protrude axially parallel from the front end of the pressure piece 9 and engage in the window 16 in the retaining plate 5. An axial movement of the setting tool 1 when screwing the fastening screw 6 into the expansion anchor 4 is transmitted from the pressure piece 9 of the setting tool 1 to the retaining plate 5 of the insulation anchor 2.

[0040] The rotary drive of the setting tool 1 is terminated when the abutment 10 rests on the outer side of the insulation board. If the pressure piece 9 protrudes axially relative to the abutment 10, the retaining plate 5 of the insulation anchor 2 is countersunk into the insulation board when the setting tool 1 is moved axially while screwing the fastening screw 6 into the expansion anchor 4 until the abutment 10 rests on the outer side of the insulation board. If the abutment 10 is flush with the front face of the pressure piece 9, the insulation anchor 2, with its retaining plate 5, is set flush with the surface of the insulation board. List of reference symbols

[0041] 1Setting tool 2Insulation dowel 3Hollow shaft 4Expansion dowel 5Retaining plate 6Fastening screw 7Rotary axis 8Drive shaft 9Thrust piece 10Abutment 11Adjusting element 12Hexagon 13Front end 14Screw head 15End wall 16Window 17Curve control 18Control curve 19Pin screw 20Pin

Claims

1. Setting tool (1) for setting an insulation dowel (2), wherein the setting tool (1) has a drive shaft (8) with a rotary axis (7) for transmitting a rotary drive to a fastening screw (6) of the insulation dowel (2), a pressure fitting (9) for transmitting an axial pressure force to the holding plate (5) and an abutment (10) for bearing against an insulation board, which is arranged radially outside the pressure fitting (9), characterized in that the setting tool (1) has an actuating element (11) which is movable relative to the drive shaft (8) and by means of which an axial displacement of the pressure fitting (9) relative to the abutment (10) can be adjusted without tools.

2. . Setting tool (1) according to claim 1, characterized in that the actuating element (11) has two end positions for setting two axial displacement positions of the abutment (10) relative to the pressure fitting (9).

3. . Setting tool (1) according to claim 1 or 2, characterized in that, in order to adjust the axial offset of the abutment (10) relative to the pressure fitting (9), the actuating element (11) can be rotated about the rotary axis (7) relative to the pressure fitting (9) and, during its rotation, produces an axial movement of the pressure fitting (9) relative to the abutment (10).

4. . Setting tool (1) according to one or more of claims 1 to 3, characterized in that the setting tool (1) has a curve control (17) for adjusting the axial offset of the pressure fitting (9) relative to the abutment (10).

5. . Setting tool (1) according to claim 4, characterized in that the curve control (17) has a steering curve (18) with a pitch relative to the rotary axis (7) such that the axial displacement of the pressure fitting (9) in relation to the abutment (10) can be adjusted by rotation of the actuating element (11) about the rotary axis (7) relative to the pressure fitting (9).

6. . Setting tool (1) according to claim 5, characterized in that the steering curve (18) has a section without a pitch for adjusting an axial offset position of the abutment (10) relative to the pressure fitting (9).

7. . Setting tool (1) according to one or more of the preceding claims, characterized in that the setting tool (1) has a flange surrounding the pressure fitting (9) as an abutment (10).

8. . Setting tool (1) according to one or more of the preceding claims, characterized in that the pressure fitting (9) is tubular.

9. . Setting tool (1) according to claims 5 and 8, characterized in that the steering curve (18) has a slot or a groove in a circumference of the tubular pressure fitting (9) with a pitch in relation to the rotary axis (7).

10. . Fastening system with a setting tool (1) according to one of the preceding claims and an insulation dowel (2).

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