RU2615951C2 - Fastening system and method for attachment to facade panel - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: fastening system adapted to the facade plate retaining opening undercut portion, comprises a fastening anchor with external thread and at least one bearing sleeve. The fastening anchor has an asymmetrical head on the rod, which protrudes in some places over the bearing sleeve installed on the anchor. The bearing sleeve has the form of a tubular body with a central hole and a support portion, which surrounds the head at least in some places of the area , where it does not fill the retaining opening. The assembled bearing sleeve protrudes by at least several tenths of a millimeter from the mounting hole.

EFFECT: increased reliability of connection.

9 cl, 27 dwg

Description

The invention relates to a fastening system for a retaining hole of a facade plate made with an undercut portion, comprising a threaded fastening anchor and at least one support sleeve.

From the prospectus “frischer Zyklon-Plattenanker FZP” of the company “freezerwerk GmbH und Co. KG ”, Waldachtal, 2008 known for undercut anchor for slabs made of natural stone. The anchor consists of a countersunk screw, an expanding ring and a sleeve. In the delivery state, in which a countersunk ring and sleeve are fitted on a countersunk screw, all three parts, to a first approximation, have the same maximum outer diameter. In the plate in which the anchor is to be installed, a holding hole is made, which has an undercut in the area of its bottom. An anchor is inserted with the head forward almost effortlessly into this hole. The sleeve protruding from the hole and surrounding the screw thread is pressed against the bottom of the hole during expansion expansion of the expansion ring. In this case, the latter is unclenched between the screw head and the sleeve so that it is jammed in the undercut of the hole.

DE 1936222 U describes an anchor made of strip steel. The end of the anchor from the side of the wall is unclenched into a cross anchor. The end of the anchor on the side of the plate is equipped with a hook. This end is inserted into the undercut blind hole of the holding plate. In this case, the hook enters the undercut of the blind hole. To fix the anchor in the plate, a core core is placed under the hook.

The invention is based on the task of developing a fastening method and a fastening system for facade slabs, which would allow fasteners to be fastened in a holding hole made in the facade slab without radial caulking.

This problem is solved by the signs of paragraphs 1, 7 and 9 of the formula. For this, the fixing anchor has an asymmetrically made head on the rod. In the radial direction, the head in some places protrudes beyond the support sleeve mounted on the anchor. The latter has a support section, which at least in some places surrounds the head in the area where it does not fill the holding hole.

According to paragraph 7, the holding hole with its undercut section is performed in two stages, and at the first stage with the help of the tool a cylindrical section of the hole is made, and at the second stage with the same or another tool from the bottom of the hole the undercut section is made. The second stage is due to the fact that the corresponding tool, removing material, moves across the midline of the cylindrical portion of the hole. A fastening anchor having a hook-shaped head is inserted into the hole along the midline in the first stage of installation so that it can be inserted into the asymmetric undercut section in the second stage of installation in the direction of the longitudinal length of the hook. A support sleeve having a recess in which the hook-shaped head enters is inserted along the anchor into the hole until the recess at least partially encompasses the head. In the mounted state, the support sleeve protrudes from the hole by at least a few tenths of a millimeter.

According to paragraph 9, instead of a screw fixing anchor, a sleeve or sleeve-like fixing element is provided.

The fastening system consisting of a mounting anchor and a support sleeve ensures quick and reliable placement of the similarity of spacer fingers on the facade plate in the corresponding hole. The fixing anchor and the support sleeve are successively inserted into the holding hole only by hand. The support sleeve also does not need to be clogged. If the friction between the retaining hole and the support sleeve due to manufacturing tolerances becomes slightly larger than anticipated, the support sleeve is pressed into the holding hole with a screwdriver, a suitable pipe wrench or just a piece of pipe. Correct seating of the mounting anchor and support sleeve is visible without any problems. If the support sleeve protrudes from the back side of the facade plate, for example, by 0.5-1.5 mm, then the landing is correct.

To make the fixing anchor and the facade slabs supporting the construction, the separate fixing anchor in the form of a spacer pin needs only to be inserted into the corresponding hole in the supporting structure, and then screw the nut. Holding the anchor anchor is not required to tighten this nut.

Other details of the invention are given in the dependent claims and the following description of schematically depicted examples of its implementation. In the drawings represent:

figure 1 - mounting system mounted in presented in the context of part of a fragment of the facade plate;

figure 2 is the same as in figure 1, however, in a different direction of view;

figure 3 - mounting anchor with a cylindrical head;

figure 4 - mounting anchor with a conical head;

5 is a mounting anchor with a hook-shaped head;

6 is a support sleeve for mounting anchor from figure 3 and 4;

7 is a support sleeve for a mounting anchor from figure 5;

Fig. 8 is a sectional view of a fragment of a facade plate;

Fig.9 is a section of a facade plate in the undercut zone;

figure 10 - mounting anchor of figure 3 in front of the hole;

11 - mounting anchor of figure 3 in the hole;

Fig - mounting anchor of figure 3 in the undercut hole before putting on the supporting sleeve;

Fig.13 is a mounting anchor of Fig.3 with a put on the supporting sleeve;

Fig.14 is a mounting anchor of Fig.3 with a facade plate fixed on a supporting structure;

Fig - tool when viewed from the side;

Fig.16 - installation of the supporting structure with the mounting anchor of Fig.3;

Fig.17 - installation of a supporting structure with a mounting anchor from Fig.4;

Fig. 18 is a side view of a combination of a mounting anchor and a deformed support sleeve of Fig. 7;

Fig.19 is an end view of Fig.18;

Fig.20 is a longitudinal section of the support sleeve of Fig.17;

Fig - a combination of Fig, theoretically rotated in the holding hole at an angle of 15 °;

Fig.22 - mounting anchor with a flat;

Fig - installation of a supporting structure with a sealing ring;

Fig - installation of a supporting structure with a mounting anchor made in the form of a tubular body;

Fig.25 - mounting anchor of Fig.24 with a cylindrical head;

Fig.26 is a mounting anchor from Fig.24 with a conical head;

Fig.27 - mounting anchor of Fig.24 with a hook-shaped head.

Figures 1 and 2 show a fragment 10 of the facade plate, into which the fastening anchor 30 is inserted using the support sleeve 60 with a geometric closure. It has a cylindrical head 35, molded on the rod 51 of the anchor 30 with offset. The fragment 10 is cut along the anchor 30, so that the middle lines 59, 49 of the rod 51 and the eccentric head 35 lie in this section plane.

Figure 3 shows the mounting anchor 30 of figures 1 and 2. It has a length of, for example, 40 mm The rod 51 has a threaded portion 53 with a metric thread 54, for example M10 × 25. The front of the shaft 51, i.e. its smooth portion 52 has a cylindrical side surface, the diameter of which corresponds, for example, to the nominal diameter of the thread 54. The fixing anchor 30 has a cylindrical head. The lateral surface 36 of the cylinder of the head 35 has a diameter of, for example, 15 mm, and the height of the head is, for example, 5 mm. The midline 49 of the head 35 is offset, for example, 2.5 mm from the midline 59 of the rod 51.

The threaded section 53 has a chamfer 56 in the area of the rear end surface 47 of the rod 51. The chamfer 56 vertically intersects the anchor plane that is formed by both middle lines 49, 59. In this case, the chamfer 56 is made on the half of the end surface 47 that intersects the continuation of the middle line 49 in the inner zone.

Figure 4 shows the mounting anchor 31, the head 37 of which has at least in some places a lateral surface 38 in the form of a truncated cone. It has a center line that coincides with the center line 59 of the rod 51. This side surface 38 is cut off by a side surface 36 of the cylinder, the diameter of which is, for example, 15 mm. The midline 49 of this side surface 36 of the cylinder is offset 2.5 mm from the midline 59 of the rod 51.

The threaded portion 53 has a transverse groove 57 or a notch on the rear end surface 47, the middle line or longitudinal length of which lies in the plane of the anchor formed by both middle lines 49, 59.

5 shows a mounting anchor 32 having a rectangular head 41 protruding on one side of the rod 51. The height of the head 41 is, for example, 5 mm, while its width corresponds to the diameter of the smooth portion 52. For example, the curved radial side surface 36 of the head 41 is part of a side surface of a cylinder having a diameter of, for example, 15 mm. The midline 49 of this section 36 of the cylinder side surface is offset 2.5 mm from the midline 59 of the rod 51.

The threaded portion 53 has a recess 58 in the form of a spherical hole, a hemispherical hole, and the like on the rear end surface 47. The recess 58 intersects the middle line 49. Alternatively, the middle line of the recess 58 runs at a small distance, for example 1-2 mm, from the middle line 49.

Chamfer 56, transverse groove 57 and recess 58 show the orientation and / or eccentricity of the corresponding head 35, 37, 41.

6 and 7 depict two support sleeves 60, 70. They have an outer diameter of, for example, 15 mm with a length also of, for example, 15 mm. Their central opening 68 has a diameter of 10 mm. It is slightly larger than the diameter of the rod 51. Both support sleeves 60, 70 are machined in the front part by material removal. The support sleeve 60 has a recess 61, for the implementation of which, for example, an end mill with an outer diameter corresponding to the diameter of the side surface 36 of the cylinder, comprising, for example, 15 mm, is milled to a depth of 5 mm along the midline 63. The latter is offset, for example, by 2, 5 mm from the central midline 69 of the support sleeve 60. The offset is selected so that the cylindrical surface of the hole 68 and the inner cylindrical surface of the milled recess 61 have a common generatrix formed by the intersection of a special plane and the named cylinders -cylindrical surfaces. A special plane is formed by both middle lines 69, 63.

The recess 71 of the support sleeve 70 in FIG. 7 corresponds to half cut along a pipe length of 5 mm in length, the diameter of which is equal to the diameter of the support sleeve 70.

The depth of the corresponding recess 61, 71, i.e. its length measured along the midline 59 is less than or equal to the height of the corresponding anchor head 35, 37, 41. 16 and 17, the depth corresponds, for example, to only half the height of the head.

Each supporting sleeve 60, 70, if necessary, is equipped with a chamfer 79 or a comparable marking (Fig.12-14, 16, 17). Chamfer 79 is made opposite the corresponding recess 61, 71, to facilitate its position during installation. Instead of the chamfer 79 in a comparable place, the end face 66 of the support sleeve 60, 70 may have a punch, a notch, and the like. If necessary, a rectangular groove extending across the end face 66 is also possible. Due to the rectangular groove, the support sleeve 60, 70 already partially worn can then be precisely positioned by turning around its center line 69.

If necessary, each supporting sleeve 60, 70 may have a structure 77 on its outer wall 67 (Fig. 7). As the structure 77, in the middle part of the outer wall 67, for example, four envelope ribs are located, slightly protruding beyond it. They should contribute to the clamping of the support sleeve 70 in the holding hole 11. Instead of enveloping ribs, can also be used ridge-parallel ribs equidistantly located on the periphery of the middle part of the outer wall 67. The distance between two adjacent ribs corresponds to the distance between the envelope ribs.

For the fastening system consisting of the mounting anchor 30, 31, 32 and the support sleeve 60, 70, a special holding hole 11 with a cylindrical 12 and a special undercut 21 sections is provided (Fig. 8). Fig. 8 shows a cutout 10, for example, of a mineral facade slab, cut in the middle through a holding hole 11. A cylindrical section 12, made on the back of the cutout 10 perpendicular to its surface, has a depth of, for example, 14 mm. It is ground in cutout 10, for example, using a grinding tool.

Tool 90 is depicted in FIG. On the front side of its shank 91 with a thickness of, for example, 10 mm, in the center there is a cylindrical grinding head 92 with a diameter of 15 mm and a height of 5 mm. The grinding head 92 is equipped with blades both on the front side and on its radial peripheral surface.

To make the retaining hole 11, the grinding head 92 is first immersed in a longitudinal longitudinal feed of 14 mm into the cutout 10 of the facade slab, and then moves linearly sideways, for example, 2.5 mm across this direction of the longitudinal feed. At this last processing step, an undercut portion 21 is made. It extends axially between the oval bottom 14 of the retaining hole 11 and the crescent-shaped undercut side 25 here (FIG. 16).

As a rule, the direction of lateral movement for all holding holes 11 of each facade plate 10 is always the same. Advantageously, the undercut section 21 is oriented so that after mounting the facade plate 10, it lies above the cylindrical section 12 (Figs. 9-14).

For the manufacture of a conical undercut section 22 for the mounting anchor in the embodiment of FIG. 4 (see also FIG. 17), a truncated cone shaped grinding head is required. In this case, the truncated cone has, for example, the same cone angle as the head 37 of the corresponding fixing anchor 31.

To install the mounting anchor 30 in the holding hole 11, it is inserted into the cylindrical section 12 so that (Fig. 10) so that the middle line 49 of the head 35 coincides with the middle line 19 of the cylindrical section 12. In Fig. 11, the anchor 30 with the end face 45 of its head 35 reaches the bottom 14 of the cylindrical section 12. Now the anchor moves upward, so that its head 35 enters the undercut section 21 (Fig. 12). As a result of this movement, the rod 51 of the anchor 30 is centered on the cylindrical section 12. The middle line 59 of the rod 51 coincides with the middle line 19 of the cylindrical section 12.

So that the head 35 can be inserted into the undercut section 21 immediately with the correct orientation, the threaded section 53 of the rod 51 has the corresponding marking 56, 57, 58 (Fig.3-5).

In the next step, in case this has not happened yet, the support sleeve 60 with its recess 61 is put forward on the rod 51 of the anchor 30 so (Fig. 12) that the support section 62 located under the recess 61 at least surrounds the head 35 anchor 30 on its lower side (Fig.13, 16).

So that the support sleeve 60 can be inserted into the cylindrical section 12 immediately with the correct orientation, its reverse end side 66 has the corresponding marking 79 (Fig.16, 17). The support sleeve 60 inserted into the holding hole 11 sits therein due to frictional closure. If, due to the material of the facade plate, the frictional closure is not reliably ensured, support sleeves with a clamp-guaranteeing structure 77 are used (Fig. 7).

In figure 1, 2, the supporting portion 62 covers almost 50% of the periphery of the head. This also applies to the combination of the mounting anchor 31 in FIG. 4 and the support sleeve 60 in FIG. 6.

In both cases, the combination of the fixing anchor 31 and the support sleeve 60 can no longer rotate around the midline 59, since the head 35, 37 and the support portion 62 are geometrically adjacent to the radial walls of the holding hole 11 and the undercut portion 21, 22.

When using the anchor 32 in Fig. 5 and the sleeve 70 in Fig. 7, the supporting portion 72 of the latter abuts against the front of the shaft 51, in which there is also a hook-shaped head 35 (Figs. 18, 19). Also in this case, the anchor 32 cannot be rotated relative to the sleeve 70, since the lateral side 42 of the head 41 is locked, locked, to the inner edge 73 of the support section 72 (Fig.21).

In addition, the combination of the anchor 32 and the sleeve 70 cannot be rotated in the holding hole 11, since the eccentric, cylindrically convex, radial outer side 36 of the head 41 (Fig. 5) is geometrically adjacent to the radial inner wall 23 of the undercut portion 21. In Fig. 21 the combination of anchor 32 and sleeve 70 is only theoretically rotated clockwise relative to the retaining hole 11 by an angle of 15 °. As can be clearly seen, the head 41 with its cylindrically convex outer side 36 intersects the contour 23 of the undercut portion 21, so that a real rotation is impossible.

In figures 1, 2, 13, 14, the support sleeve 60 or 70 is inserted into the holding hole 11 to such a depth that it, at least in some places, abuts the bottom 14 of the hole 11 with its front end surface 64. closer to the ground part of the hole there is no cavity in which rain water could accumulate.

After installing the support sleeves 60, the facade plate 10 is suspended from the supporting structure 80 by means of fixing anchors 30. For this, the threaded sections 53 of the anchors 30 are inserted into the corresponding holes 81 of the supporting structure 80 (Fig. 14). Finally, the corresponding nuts 85 are screwed onto the threaded sections 53. They are tightened without holding the corresponding anchor 30. In this case, for example, the side surface (36) of the head 35 rests partially and without edges on the cylindrical inner wall 23 of the undercut section 21. In case of a slight difference in diameters between the side surface (36) and the inner wall 23, the specific pressure acting on the material of the facade plate 10 is minimal.

Through each nut 85, the supporting structure 80 and the support sleeve 60 are pulled without a gap with the corresponding head 35 of the anchor 30.

When tightening the nut 85, the material of the facade plate 10, with the exception of the direction of the periphery of the head 35, does not experience additional tension (Fig. 16). In Fig.16 shows the mounted anchor 30, which for clarity sits in the holding hole 11 with a large gap. As you can see, the facade plate 10 in the radial direction of the anchor rests only on the sleeve 60 and the rod 51. In the axial direction, the head 35 with its end surface 36 does not touch the bottom 14 of the hole 11, and the rear end surface 46 of the head 35 does not contact the covering side 25 of the undercut section 21. Thus, the material of the facade plate 10 in the axial direction of the anchor 30 is not subjected to tension, which could cause cracking starting from the lateral side 25.

When using the anchor 30 in FIG. 5 (FIG. 17), the facade plate 10 can self-center relative to the anchor 31 in the axial direction. In this embodiment, it rests on its head 37. Since in this case the undercut portion 22 in the bearing area has a contact surface in the form of a lateral surface of a truncated cone, this surface rests without a gap on the head 35. Also, in this case, axial tension is not created in the facade plate 10.

On Fig-22 shows a mounting anchor 32, which in the area of the smooth rod 52 and head 41 has a flange 55, whose depth corresponds to the depth of the thread 54. In Fig.22 shows a flange 55, which goes into the thread 54. On the anchor 32 before by mounting in the facade plate 10, a support sleeve 70 is put on. To position it on the anchor 32 without falling and turning, the sleeve 70 put on it in the area of its support section 72 is plastically deformed so that a dent 75 arises, the inner wall 76 of which adjoins with a gap to the flat 55 anchor 32 (Fig. 18, 19).

Since the flat 55 ends at the threaded portion 54, the deformed sleeve 70 cannot be removed from the anchor 32. When mounting the anchor 32 in the facade plate 10, the sleeve 70 is pulled as far as possible so that its end surface 65 is spaced as far as possible from the head 35.

After turning or inserting the head 41 into the undercut section 21, the support sleeve 70, which is guided without turning along the flat 55, is inserted into the cylindrical section 12 of the holding hole 11.

In accordance with the weight of the supported facade plate 10, mounting anchors 30, 31, 32 are performed, for example, with threads M10, M12 or M6 or M8. The diameter of the head and, therefore, also the inner diameter of the retaining hole 11 correspond, for example, to at least 1.5 times the diameter of the rod. The height of the corresponding head 35, 37, 41 is equal to half the diameter of the rod.

Each supporting sleeve 60, 70 has an outer diameter of a corresponding head 35, 37, 41. The wall thickness of the sleeve 60, 70 is equal to a quarter of the diameter of the rod. The length of the sleeve 60, 70, if necessary, is brought into line with the wall thickness of the facade plate 10.

Of course, the individual geometrical values of the corresponding anchor 30, 31, 32 and the supporting sleeve 60, 70 suitable for it may, if necessary, differ from the named values. Including, this may be required if the material of the facade plate 10, for example, is very porous. The associated low material density may require a support sleeve 60, the outer diameter of which is greater than 1.5 times the diameter of the rod 51.

23 shows the supporting structure 80 with the facade plate fixed by means of the fixing anchor 37. An elastic sealing washer 88 is located between it and the corner profile 80. The latter sits, for example, on the support sleeve 60. The sealing washer 88 prevents, inter alia, penetration moisture in the hole 11. It can also directly, i.e. not through the anchor 37, transfer to the supporting structure 80, especially in the case of thin facade plates 10, acting on the plate 10, pressing the wind load on the facade. In this case, the sealing washer 88 may also be replaced by a disk spring.

Instead of a screw-shaped fastener 30, 31, 32, a sleeve or sleeve-like fastener 130, 131, 132 in FIGS. 24-27 can also be used. In relation to their outer surfaces, the various fasteners 130, 131, 132 correspond to the front parts of the fastening anchors 30, 31, 32. However, in FIG. 24 they have a through hole 152 with an internal thread 154. Of course, a blind hole can also be used instead of the through hole 152 . In this case, the corresponding end surface 45 would be closed.

24, the clamping force holding the front plate 10 between the supporting sleeve 60 adjacent to the head 137 of the fastener 131 and the corner profile 80 is created by a screw 86 screwed into the thread 154. If necessary, a washer 87 is located between the screw head 86 and the corner profile 80.

List of Reference Items

10 - cutout of the front plate, front plate

11 - holding hole

12 - cylindrical section

14 - bottom of the hole

19 - middle line

21 - cylindrical undercut section

22 - conical undercut section

23 - inner wall

25 - side undercut

29 - the middle line of sections 21, 22

30 - mounting anchor with a cylindrical head, mounting element

31 - fastening anchor with a conical head, fastening element

32 - mounting anchor with a rectangular head, mounting element

35 - a cylindrical head; anchor head

36 - side surface of the cylinder; section of the lateral surface of the cylinder

37 - a head in the form of a lateral surface of a truncated cone; anchor head

38 - lateral surface of a truncated cone

41 - in places a rectangular head; anchor head

42 - side of the head

45 - front end surface

46 - end surface of the reverse side of the head

47 - end surface of the rod

49 - middle line

51 - rod

52 - smooth portion of the rod

53 - threaded section

54 - thread, external thread

55 - flax

56 - chamfer marking

57 - transverse groove, notch, mark

58 - recess, hole, mark

59 - the middle line

60 - supporting sleeve in Fig.6; fastener

61 - recess, milled recess

62 - reference area

63 - midline notch 61

64 - front end side; end surface

65 - the middle end side; end surface

66 - rear end side; end surface

67 - outer wall

68 - hole

69 - the middle line

70 - supporting sleeve in Fig.7; fastener

71 - recess, milled recess

72 - reference area

73 - inner edge

75 - dent, deformation

76 - the inner wall of the dent

77 - corrugation, knurling; envelope structure

79 - chamfer, mark

80 - corner profile, supporting structure

81 - hole

85 - nut

86 - screw

87 - washer

88 - a sealing washer

90 - tool grinding tool

91 - tool shank

92 - grinding head

130 - fixing element with a cylindrical head, fixing anchor

131 - fastener with conical head, fixing anchor

132 - fastener with a rectangular head, mounting anchor

135 - a cylindrical head; anchor head

137 - a head in the form of a lateral surface of a truncated cone; anchor head

141 - in places a rectangular head; anchor head

151 - tubular body

152 - through hole, blind hole

154 - thread, internal thread

Claims (13)

1. A fastening system for a façade plate (10) having a retaining hole (11) made with an undercut section (21, 22), comprising a fastening anchor (30, 31, 32) provided with an external thread (54) and at least one supporting sleeve (60 , 70), and the mounting anchor (30, 31, 32) has an asymmetrically made head (35, 37, 41) on the rod (51), which in some places radially protrudes from the supporting one mounted on the mounting anchor (30, 31, 32) a sleeve (60, 70), and the supporting sleeve (60, 70) is made in the form of a tubular body with a Central hole (68) and has a supporting section (62, 72), to which at least partially surrounds the head (35, 37, 41) in the area where it does not fill the holding hole (11), while the support sleeve (60, 70) in the mounted state protrudes at least several tenths of a millimeter from mounting holes (11). 2. A fastening system according to claim 1, characterized in that the head (35, 37, 41) made on the shaft (51) of an eccentric middle line (59) of the external thread (54) has a length or diameter oriented across the middle line (59), appropriate / corresponding to at least 1.5 times the diameter of the rod. 3. The fastening system according to claim 2, characterized in that the geometric midpoint oriented perpendicular to the midline (59) of the length of the head (35, 37, 41) is offset from the midline (59) by at least a quarter of the diameter of the rod. 4. The fastening system according to claim 1, characterized in that the geometric lateral surface of the head (35) has a shape that is completely or sometimes cylindrical or sometimes in the form of a truncated cone. 5. The fastening system according to claim 1, characterized in that the support sleeve (60, 70) has a recess (61, 71) on one end side (64), the zone opposite the recess (61, 71) being the corresponding supporting section (62 , 72). 6. The fastening system according to claim 1, characterized in that at least in one place - perpendicular to the midline (59) - the head (35, 37, 41) protrudes beyond the outer wall (67) of the support sleeve (60, 70) onto a value corresponding to at least a quarter of the diameter of the rod of the mounting anchor (30, 31, 32). 7. A method of attaching a fastening system to a facade plate (10), the facade plate (10) having a holding hole (11) with an undercut portion (21), and the fixing system comprising at least one fixing anchor (30, 31, 32) and support sleeve (60, 70), - moreover, the holding hole (11) with the undercut section (21) is performed in two stages: at the first stage, with the help of the tool (90), a cylindrical section (12) of the holding hole (11) is made, and at the second stage with this or another tool ( 90) from the bottom (14) of the holding hole (11), an undercut section (21) is made by moving the tool (90) perpendicular to the midline (19) of the cylindrical section (12) of the holding hole (11) with the removal of material, - moreover, the mounting anchor (30, 31, 32) having a hook-shaped head (35, 37, 41) is inserted into the retaining hole (11) along the midline (19) in the first stage of installation, and the head (35, 37, 41) in the direction of the longitudinal length of the file, they are inserted into the asymmetric undercut section (21), - moreover, the support sleeve (60, 70) having a recess (61, 71), which includes a hook-shaped head (35, 37, 41), is inserted into the holding hole (11) along the mounting anchor (30, 31, 32), while the recess (61, 71), at least in some places will not cover the head (35, 37, 41), - moreover, in the mounted state, the support sleeve (60, 70) protrudes from the holding hole (11) by at least several tenths of a millimeter. 8. The method according to p. 7, characterized in that the undercut section (21) and the cylindrical section (12) of the holding hole (11) have the same diameter. 9. A fastening system for a facade plate (10) provided with an undercut section (21, 22) of a retaining hole (11), comprising a fastening element (130, 131, 132) provided with an internal thread (154) and at least one support sleeve (60, 70), characterized in that the fastener (130, 131, 132) has a head (135, 137, 141) asymmetrically formed on its tubular body (151), which in some places protrudes in the radial direction from the fastened element (130, 131 132) a support sleeve (60, 70), wherein the support sleeve (60, 70) has a support portion (62, 72), which is at least Test Packages surrounds the head (135, 137, 141) in an area where it does not fill the retaining hole (11).

Images