WO2020074170A1

WO2020074170A1 - Handle system

Info

Publication number: WO2020074170A1
Application number: PCT/EP2019/072932
Authority: WO
Inventors: Joerg Ruhland
Original assignee: Hermat-Metallwaren B. Porst GmbH
Priority date: 2018-10-08
Filing date: 2019-08-28
Publication date: 2020-04-16
Also published as: DE102018124765A1; DE102018124765B4

Abstract

The invention relates to a handle system for being mounted on a door or a window, comprising a handle (20), a rosette (30) having a tubular section (32) and an abutment plate (34), a retaining element and a polygonal pin (50). The handle (20) comprises, at a first end next to the door or the window (12), an entrainment profile (26). The rosette (30) comprises an entrainment counter profile (36), which corresponds to the entrainment profile (26) of the handle (20), and a thread (38). The retaining element comprises a counter thread (48), which corresponds to the thread (38) of the rosette (30). When the entrainment profile (26) of the handle (20) is in an engagement position with the entrainment counter profile (36) of the rosette (30), the thread (38) of the rosette (30) can be screwed, by a rotation of the handle (20), into the counter thread (48) of the retaining element in such a way that the rosette is secured on the door or the window (12).

Description

Handle system

The invention relates to a handle system for mounting on a door or a window with the features of the preamble of claim 1 and a method for mounting the handle system on a door or a window.

A handle system and a method for mounting such a handle system on a door or on a window are known from practice. The handle system comprises two handles, two rosettes, each with a pipe section and a contact plate, two dowel rings and a polygonal pin. The polygonal pin is firmly connected to the first handle at a first end. A thread is formed at the second end of the polygonal pin. Furthermore, the handle system comprises a threaded nut which is screwed onto the thread of the polygonal pin during the assembly of the handle system in such a way that at least one of the two dowel rings is pressed into the door or the window. The threaded nut is then removed from the polygonal pin and the second handle is pushed onto the polygonal pin.

The known handle system for mounting on a door or on a window accordingly requires a polygonal pin with a thread, a threaded nut and a corresponding tool for screwing the threaded nut onto the thread. The assembly is therefore very expensive and requires access to the door or window from both sides.

The invention is therefore based on the object of providing a handle system for mounting on a door or on a window and a method for mounting the handle system on the door or the window, the mounting being able to be carried out without tools and from one side. This object is achieved by the handle system with the features of claim 1 and the method for mounting the handle system with the features of claim 11.

A handle system for mounting on a door or a window is therefore proposed, comprising a handle, a rosette with a tube section and one

Contact plate, a holding element and a polygonal pin. The handle comprises, at a first end facing the door or the window, a driving profile and the rosette a driving counter profile corresponding to the driving profile of the handle and a thread. The holding element comprises a mating thread corresponding to the thread of the rosette, which can also be formed by screwing the rosette into the holding element. When the driving profile of the handle is in an engagement position with the driving counter profile of the rosette, the thread of the rosette can be screwed into the mating thread of the holding element in such a way that the rosette is secured to the door or window. With the proposed handle system, therefore, no additional tools are required for mounting on a door or a window. Rather, the handle system can be secured by turning the handle on the door or window.

In an advantageous embodiment of the handle system according to the invention, the holding element is a dowel ring which, when the driving profile of the handle is in the engagement position with the driving counter profile of the rosette, by the rotation of the

Handle can be screwed into the mating thread of the dowel ring in such a way that it is secured to the door or window. By screwing the rosette into the dowel ring, the dowel ring is spread, for example, and thus secured to the door or window. Accordingly, fixing the dowel ring to the door or window does not require any additional components.

The dowel ring can be made of plastic or metal and can comprise projections. The projections can cut into the door or window by turning the handle so that the dowel ring and thus the rosette are secured to the door or window. The projections can also be pressed into the door or window by turning the handle. The rosette thread turns by turning the handle into the mating thread of the dowel ring, whereby the dowel ring is spread open and the projections of the dowel ring are pressed into the material of the door or window.

The holding element can also be formed on the door or the window, i. H. the mating thread can then be formed directly in the material of the door leaf or window leaf, which is made, for example, of wood or a metal. Thus, a number of necessary components of the handle system are further reduced. The counter-thread of the holding element can be precut in the holding element or can be formed by screwing in the rosette. In a preferred embodiment of the handle system according to the invention, the handle system comprises a mounting ring. The mounting ring can be arranged between the handle and the rosette when mounting the handle system on the door or window. Because of the mounting ring, the handle can only be inserted into the rosette to such an extent that the driving profile of the handle with the driving counter profile of the rosette is in the engaged position. This facilitates the assembly of the handle system.

In an end region facing the door or the window, the handle can comprise an end section, at whose end facing the door or the window the entrainment profile is arranged. At the other end of the end section, for example in the form of an annular collar or a step, a contact surface can be formed which forms an annular surface.

In an advantageous embodiment of the handle system according to the invention, the mounting ring has such a thickness that the driving profile of the handle with the driving counter profile of the rosette is in the engaged position when a first ring surface of the mounting ring rests on the contact surface of the handle and a second ring surface of the Mounting rings on the contact plate of the rosette. This simplifies the assembly of the handle system, since there is no need to constantly manually position the driving profile of the handle in relation to the driving counter profile of the thread during assembly. For example, the rosette has an end portion with a length. The end area of the rosette comprises the contact plate and a partial area of the pipe section, the partial area of the pipe section extending in the axial direction from the contact plate to the carrier counter profile of the rosette. For example, the mounting ring has a width b _M in the axial direction such that the sum of the width b _M and the length of the end region of the rosette corresponds to a length 1 _{H of} the end section of the handle. Thus, when mounting the mounting ring on the outside of the rosette, the driving profile of the handle is positioned precisely in relation to the driving counter profile of the rosette. This facilitates the assembly of the handle system. In an advantageous embodiment of the handle system according to the invention, the mounting ring has an outer diameter d _a , M which is larger than an inner diameter d, .R of the contact plate of the rosette. An inner diameter d,. _{\ I of} the mounting ring is larger than an outer diameter d _a , HE of the end section of the handle. Depending on a geometric design of the handle, the inner diameter d,. _{\ I of} the mounting ring is smaller than an outer diameter d _a. n _\ the contact surface of the handle or a length of a diagonal of the contact surface of the handle. Thus, the mounting ring can only be pushed onto the end section of the handle up to the contact surface of the handle and the handle can only be pushed into the rosette until the mounting ring contacts the mounting plate of the rosette. As a result, the driving profile of the handle can be aligned with the driving counter profile of the rosette in the engagement position by appropriately designing the mounting ring.

The mounting ring of the handle system according to the invention is made of plastic, for example.

The driving profile of the handle can be an external hexagon and the driving counter profile of the rosette can be an internal hexagon. In an advantageous embodiment of the handle system according to the invention, the thread of the rosette is an external thread and the thread of the dowel ring is an internal thread. According to a further aspect of the present invention, a method for mounting a handle system on a door or a window is proposed. The method comprises the following steps: a) inserting a rosette into a holding element in such a way that a threaded outer surface of a pipe section of the rosette contacts an inner surface of the holding element with a counter thread;

b) inserting a handle into the rosette so that a driving profile formed on one end of the handle facing the door or the window engages with a driving counter profile formed on an inner surface of the tube section of the rosette;

c) turning the handle so that the rosette is screwed into the holding element and is fixed thereon;

d) removing the handle from the rosette; and

e) inserting a polygonal pin into a hole in the door or window and tying the handle to the polygonal pin in any order, the tying comprising attaching the handle to the polygonal pin and attaching the handle to the polygonal pin.

The method according to the invention therefore makes it possible to mount a handle system on a door or a window without additional tools. In an advantageous embodiment of the method according to the invention, the holding element is inserted in step a) before or after the insertion of the rosette into the holding element in the hole in the door or window, the holding element being a dowel ring and the insertion of the rosette into the Holding element and the insertion of the Haltele element in the hole of the door or window in any order. The holding element can be turned by turning the handle in step c), which causes the

Rosette is screwed into the holding element, fixed to the door or window, but this does not require any additional tools.

The holding element is formed or introduced, for example, before step a) in the hole in the door or window. In a preferred embodiment of the method according to the invention, a mounting ring is attached to the handle before step b) and the mounting ring is removed from the handle after step d). As a result, the driving profile of the handle and the driving counter profile of the thread can be positioned exactly with respect to one another, that is to say brought into an engagement position. This simplifies assembly.

The handle is fixed in step e), for example by means of a screw on the polygonal pin.

Exemplary embodiments of handle systems for mounting on a door according to the invention are shown schematically and in simplified form in the drawing and are explained in more detail in the description below. It shows:

Figure 1 is a perspective view of a handle system according to the invention, comprising a mounting ring in an unassembled state;

FIG. 2 shows a section through the handle system according to FIG. 1 in an assembly position;

3 shows a step a) of a method for assembling the handle system shown in FIG. 1;

Figure 4 shows a step b) of the method for assembling the shown in Figure 1

Handle system with a mounting ring;

Figure 5 shows a step c) of the method for assembling the shown in Figure 1

Handle system with a mounting ring;

Figure 6 shows a step e) of the method for assembling the shown in Figure 1

Handle system;

Figure 7 shows a step e) of the method for assembling the shown in Figure 1

Handle system after inserting a polygonal pin into a door foch; Figure 8 shows the step e) of the method for assembling the handle system shown in Figure 1 after attaching a handle on the polygon pin;

Figure 9 is a perspective view of a second embodiment of a

Handle system according to the invention in the unmounted state;

Figure 10 is a perspective view of a third embodiment of a

Handle system according to the invention in the unmounted state;

Figure 11 is a perspective view of a fourth embodiment of a

Handle system according to the invention in the unmounted state; Figure 12 is a perspective view of a fifth embodiment of a

Handle system according to the invention in the unmounted state;

Figure 13 is a perspective view of a sixth embodiment of a

Handle system according to the invention in the unmounted state;

Figure 14 is a perspective view of a seventh embodiment of a

Handle system according to the invention in the unmounted state;

FIG. 15 shows a step a) of a method for assembling the handle system shown in FIG. 13;

Figure 16 shows a step b) of the method for assembling the shown in Figure 1

Handle system with a mounting ring; FIG. 17 shows a step c) of a method for mounting the handle system shown in FIG. 13 with a mounting ring;

Figure 18 shows a step e) of the method for assembling the shown in Figure 13

Handle system;

Figure 19 shows a step e) of the method for assembling the shown in Figure 13

Handle system after inserting a polygonal pin into a hole in a door; and Figure 20 shows the step e) of the method for assembling the handle system shown in Figure 13 after attaching a handle on the polygon pin.

1 shows a handle system 10a for mounting on a door 12. The handle system 10a comprises a handle 20, a rosette 30, a holding element in the form of a dowel ring 40, a polygonal pin 50, a mounting ring 60 and a screw 70.

The handle 20 has a gripping section 20a and a connecting section 20b connected to the gripping section 20a at a right angle for connecting the handle 20 to the door 12. The gripping section 20a and the connecting section 20b each have a circular cross section. The connecting section 20b comprises in an end region facing away from the gripping section 20a an end section 22 with a length 1 _H in the axial direction and an outer diameter d _a , HE- The outer diameter d _A , HE of the end section 22 is smaller than the outer diameter d _a , HA of the region of the connecting section 20b facing the gripping section 20a, so that a contact surface 24 with an outer diameter d _{a, HA is} formed. At the end section 22, a driving profile 26 is arranged, which is an external hexagon.

The rosette 30 comprises a tube section 32 with an inner diameter di _{, R} and a contact plate 34 An entraining counter profile 36 is formed on the inner surface of the rosette 30. The entrainment counter profile 36 corresponds to the entrainment profile 26 of the handle 20 and is a hexagon socket. On an outer surface of the Rohrab section 32, a thread 38 is formed. A mating thread 48 corresponding to the thread 38 of the rosette 30 is formed on an inner surface of the dowel ring 40. The mating thread 48 is an internal thread, the thread 38 of the rosette 30 being an external thread. The dowel ring 40 further comprises projections 42 which protrude from the dowel ring 40 in the radial direction outwards and / or in the axial direction in the direction of the door 12. The mounting ring 60 has an outer diameter d _a , M, which is larger than the inner diameter d, .R of the rosette 30. An inner diameter d,. _{\ I of} the mounting ring 60 is larger than the outer diameter d _a , HE of the end section 22 of the handle 20 and smaller than the outer diameter d _a. n _{\ of} the contact surface of the handle 20. Furthermore, the mounting ring 60 has a width b _{\ i} in the axial direction.

In Figures 3 to 8, a method for assembling the handle system 10a shown in Figure 1 is shown schematically.

As shown in FIG. 3, in a first step the rosette 30 is inserted into the dowel ring 40 in such a way that the outer surface of the pipe section 32 of the rosette 30 which has the thread 38 is in engagement with the inner surface of the dowel ring 40 which has the counter thread 48. Then the dowel ring 40 is inserted into a compartment 14 of the door 12.

The mounting ring 60 is then attached to the handle 20, in particular the end section 22 of the handle 20, so that a first ring surface 62 of the mounting ring 60 bears against a contact surface 24 of the handle 20 (see FIG. 4).

The handle 20 is inserted into the rosette 30 together with the mounting ring 60 arranged thereon until a second ring surface 64 of the mounting ring 60 bears against the contact plate 34 of the rosette 30. The width b _{\ i of} the mounting ring 60 in the axial direction is selected such that the sum of the width b _{\ i of} the mounting ring 60 and the catches of the end region 33 of the rosette 30 corresponds to a catch 1 _{H of} the end section 22 of the handle 20. Thus, the driving profile 26 of the handle 20 with the driving counter profile 36 of the rosette 30 is engaged or in a grip position when the first ring surface 62 of the mounting ring 60 with the contact surface 24 of the handle 20 and the second ring surface 64 with the contact plate 34 the rosette 30 contacted.

By turning the handle 20 shown in FIG. 5, the thread 38 of the rosette 30 is screwed into the counter thread 48 of the dowel ring 40. The screwing in of the thread 38 of the rosette 30 into the mating thread 48 of the dowel ring 40 results in a spreading and / or rotation of the dowel ring 40, as a result of which the dowel ring 40 spread out in the door 12, the projections 42 of the dowel ring 40 wedge on the door 12 and / or cut the projections 42 into the door 12. Both the wedging and the cutting result in the dowel ring 40 and thus the rosette 30 being fixed to the door 12. As shown in FIG. 6, the handle 20 is removed from the rosette 30 in a subsequent step and the polygonal pin 50 is inserted into the hole 14 of the door 12.

After removing the mounting ring 60 from the handle 20, the handle 20, as shown in FIGS. 7 and 8, is pushed onto the polygonal pin 50 and fixed to the polygonal pin 50 with a screw 70. FIGS. 9 to 14 show alternative embodiments of a handle system for mounting on a door 12, only differences from the handle system 10a shown in FIG. 1 being explained below. Components of the alternative embodiments not described in greater detail correspond to those of the handle system 10a of the first embodiment shown in FIG. The handle systems 10b to 10g shown in FIGS. 9 to 14 each comprise two handles 20, two rosettes 30 'and 30 ", a polygonal pin 50 and two screws 70. In addition, the handle systems 10b to 10e shown in FIGS. 9 to 12 each comprise two dowel rings 40 'and 40 ", each of which can be made of plastic or metal. The rosettes 30 ″ and 30 ″ and the Düberl rings 40 ″ and 40 ″ each have different lengths in the handle systems lOc to lOe.

The handle system 10b shown in FIG. 9 further comprises two washers 80, two covers 82 for the rosettes 80 and two washers 84. The washers 80 are in an assembled state of the handle system 11 in each case between the respective rosette 30 and the relevant cover 82 arranged. The washers 84 are in the assembled state of the handle system 10 between the respective cover 82 and the relevant handle 20.

In the embodiment according to FIG. 14, dowel rings are dispensed with. Rather, the rosettes 30 'can each be screwed directly into a thread on the Hole 14 of the door 12 is formed. The threads 38 of the rosette 30 'can also be self-tapping.

The dowel ring 40 shown in FIG. 14 is particularly suitable for a door with a metal or aluminum frame. The handle systems 10b to 10e shown in FIGS. 9 to 12 are assembled in accordance with the assembly method shown in FIGS. 3 to 8.

In contrast to the handle system 10a shown in FIG. 1, the handle system 10f shown in FIG. 13 does not comprise a holding element in the form of a dowel ring. To fix the rosette 30 to the door 12, however, a thread 38 is formed on a tube section 32 of the rosette 30. This is, for example, a self-tapping thread that can be screwed into a hole 14 of the door 12, which forms a holding element. A corresponding mating thread can also be formed in the hole 14 of the door 12.

The handle systems 10a to 10f shown in FIGS. 1 and 9 to 13 can also be combined with one another. A possible combination is shown by way of example in FIG. 14. FIG. 14 shows a handle system 10g which comprises two rosettes 30 'and 30' and a dowel ring 40 '. A counter thread 38 'of the rosette 30' can be screwed into a thread 48 'of the dowel ring 40' to secure the rosette 30 'on the door 12 in accordance with the assembly method shown in FIGS. 3 to 8. The rosette 30 "corresponds to the rosette 30 of the Girff system 13f shown in FIG. 13 and comprises a pipe section 32" on which a thread 38 "is formed.

An assembly of the handle system 10f shown in FIG. 13 and the right part of the handle system 10g shown in FIG. 14 is shown schematically in FIGS. 15 to 20.

In a step a) shown in FIG. 15, the rosette 30 or 10 "is inserted into the hole 14 of the door 12. A mounting ring 60 is then attached to the handle 20 and in step b) inserted into the rosette 30 or 30 "in such a way that the driving profile 26 of the handle 20 engages with a driving counter profile 36 formed on the inner surface of the tube section 32 (see FIG 16). In this position, the handle 20 is rotated in step c), as shown in Figure 17, whereby the Rosette 30 or 30 “screwed into door 12 and fixed to it. After the handle 20 has been removed from the rosette 30 or 30 "in step d), the polygonal pin 50 is inserted into the hole 14 in the door 12 in a step e) shown in FIG. Then the handle 20, from which the mounting ring 60 was previously removed, is placed on the polygonal pin 50 and fastened to it with a screw 70 (see FIGS. 19 and 20). In the handle system 10f shown in FIG. 13, these steps are carried out in the same way on the opposite side of the door 12.

The embodiments described above can also be combined with one another, that is to say one embodiment can be arranged on one side of the relevant door leaf and another embodiment can be arranged on the other side of the relevant door leaf.

List of reference symbols 10a handle system

lOb handle system

lOc handle system

lOd handle system

lOe handle system

lOf handle system

lOg handle system

12 door

14 holes

20 handle

22 end section

24 contact surface

26 Take-away profile

28 recess

30 rosette

30 'rosette

30 "rosette

32 pipe section

33 end area

34 contact plate

36 Take-away counter profile

38 threads

40 dowel ring

40 'dowel ring

40 "dowel ring

42 head start

48 counter thread

50 polygonal pin

60 mounting ring

62 first ring surface

64 second ring surface 70 screw

80 washer

82 cover

84 washer

b _M Width of the mounting ring

d _a, HA outside diameter of the contact surface of the handle d _a, HE outside diameter of the end section of the handle d _a , M outside diameter of the mounting ring

di _{, M} inner diameter of the mounting ring

di _{, R} inner diameter of the contact surface of the rosette

1H length of the end portion of the handle

! _R length of the end of the rosette

Claims

1. Handle system for mounting on a door or a window, comprising a handle (20), a rosette (30, 30 ', 30 ”) with a tube section (32) and a support plate (34), a holding element and one Polygonal pin (50), characterized in that the handle (20) comprises a driving profile (26) on a first end facing the door or window (12), the rosette (30, 30 ', 30 ”) comprises a driving counter profile (36) corresponding to the driving profile (26) of the handle (20) and a thread (38) and the retaining element has a counter thread (corresponding to the thread (38) of the rosette (30, 30 ', 30 ”) ( 48), the thread (38) of the rosette (30, 30 ', 30 ”) if the entrainment profile (26) of the handle (20) with the entrainment counter profile (36) of the rosette (30, 30', 30 ”) Is in an engaged position, by rotating the handle (20) into the counter-thread (48) of the holding element in such a way that the rosette on the door or window he (12) is secured. 2. Handle system according to claim 1, characterized in that the holding element

Dowel ring (40, 40 ', 40 ”), which, when the driving profile (26) of the handle (20) with the driving counter profile (36) of the rosette (30, 30', 30”) is in the engagement position, through the rotation of the handle (20) in the counter thread (48) of the dowel ring (40, 40 ', 40 ”) can be screwed in such a way that it is secured to the door or window (12).

3. Handle system according to claim 1, characterized in that the holding element on the door or the window (12) is formed.

4. Handle system according to one of claims 1 to 3, characterized by a Monta low (60), which during the assembly of the handle system (lOa, lOb, lOc, lOd, lOe, lOf, lOg) between the handle (20) and the rosette (30, 30 ', 30 ”) can be arranged, so that the handle (20) can only be inserted into the rosette (30, 30', 30”) to such an extent that the entrainment profile (26) of the handle (20) with the Take-away counter profile

(36) the rosette (30, 30 ’, 30”) is in the engaged position.

5. Handle system according to one of claims 1 to 4, characterized in that the handle (20) on an end region facing the door or window (12) comprises an end section (22) on the door or window (12 ) facing end the driving profile (26) is arranged and at the other end a contact surface (24) is formed.

6. Handle system according to claim 5, characterized in that the mounting ring (60) has a thickness such that when a first ring surface (62) of the mounting ring (60) abuts the contact surface (24) of the handle (20) and a second ring surface (64) of the mounting ring (60) on the contact plate (34) of the rosette (30,

30 ’, 30”), the entrainment profile (26) of the handle (20) with the entrainment counter profile (36) of the rosette (30, 30 ’, 30”) is in the engagement position.

7. Handle system according to claim 5 or 6, characterized in that the rosette (30, 30 ', 30 ”) comprises an end region (33) with a length (), which the contact plate (34) and a partial region of the tube section (32) The partial area of the pipe section (32) extends from the contact plate (34) to the entraining counter profile (36) of the rosette (30, 30 ', 30 ”), and the mounting ring (60) has such a width (b _{\ i} ) in the axial direction has the sum of the width (b _{\ i} ) and the length (U) of the end region (33) of the rosette (30, 30 ', 30 ”) of a length (1 _H ) of the end section (22) corresponds to the handle (20).

8. Handle system according to one of claims 5 to 7, wherein the mounting ring (60) has an outer diameter (d _a , M) which is larger than an inner diameter (d, .R) of the Anla geplatte (34) of the rosette (30, 30th ', 30 ”), and has an inner diameter (di _{, M} ) which is larger than an outer diameter (d _a , HE) of the end section (22) of the handle (20) and smaller than an outer diameter (d _{a, HA} ) or a length of a diagonal len of the contact surface (24).

9. Handle system according to one of claims 4 to 8, characterized in that the mounting ring (60) is made of plastic.

10. Handle system according to one of claims 1 to 9, characterized in that the driving profile (26) of the handle (20) is an external hexagon and the driving-counter profile (36) of the rosette (30, 30 ', 30 ”) is an internal hexagon .

11. A method for mounting a handle system on a door or window (12), comprising:

a) inserting a rosette (30, 30 ’, 30”) into a holding element such that an outer surface of a tube section (32) of the rosette (30,

30 ’, 30”) contacted with an inner surface of the holding element having a counter thread (48);

b) inserting a handle (20) into the rosette (30, 30 ', 30 ”) so that a driving profile (26) formed on an end of the handle (20) facing the door or window (12) with one on an inner surface of the pipe section

(32) of the rosette (30, 30 ’, 30”) engages entrained counter profile (36); c) turning the handle (20) so that the rosette (30, 30 ’, 30”) is screwed into the holding element and is fixed thereon;

d) removing the handle (20) from the rosette (30, 30 ’, 30”); and

e) inserting a polygonal pin (50) into a hole (14) in the door or window

(12) and tying the handle (20) to the polygonal pin (50) in any order, the tying plugging the handle (20) onto the polygonal pin (50) and attaching the handle (20) to the polygonal pin ( 50).

12. The method according to claim 11, characterized in that in step a) the holding element before or after the insertion of the rosette (30, 30 ', 30 ”) in the holding element in the hole (14) of the door or window (12) is used, the holding element being a dowel ring (40, 40 ', 40 ”) and inserting the rosette (30, 30', 30”) into the holding element and inserting the holding element into the hole (14) in the Door or window (12) in any order.

13. The method according to claim 11 or 12, characterized in that the holding element by turning the handle (20) in step c), whereby the rosette (30, 30 ', 30 ”) is screwed into the holding element the door or window (12) is fixed.

14. The method according to claim 11, characterized in that before the step a) the holding element in the hole (14) of the door or the window (12) is formed or brought.

15. The method according to any one of claims 11 to 14, characterized in that before step b) a mounting ring (60) is attached to the handle (20) and after step d) the mounting ring (60) from the handle (20) Will get removed.