Fastening unit for relay nozzle

Abstract

The invention relates to a fastening unit (4) for a relay nozzle (3) of an air jet loom having a sley profile (10) extending in a width direction (14), the fastening unit (4) comprising a first portion (41) adapted to be fastened to the sley profile (10) and a second portion (42) having a receiving structure (421) defining a first axis (105) and adapted to receive the relay nozzle (3), the first portion (41) is arranged coaxially with the first axis (105) such that the longitudinal axis (31) of the relay nozzle (3) is arranged coaxially with the first axis (105), and wherein the second portion (42) is coupled to the first portion (41) via a coupling structure (7) so as to be rotatable about a second axis (106) transverse to and intersecting the first axis (105). The invention also relates to a relay nozzle system comprising a fastening unit (4) and a relay nozzle (3).

Description

Technical Field

[0001] The invention relates to a fastening unit for a relay nozzle of an air jet loom and also to a relay nozzle system comprising the fastening unit and the relay nozzle. Background Art

[0002] It is known that the relay nozzle is fastened to the sley of an air jet weaving machine using a fastening unit. For example, a fastening unit for a relay nozzle is shown in EP395132A1. The fastening unit shown in EP395132A1 comprises a holder with a protruding tongue, wherein in use, the tongue is inserted into a slot provided on the sley profile and is clamped in the slot using a clamp. The relay nozzle is fixed to the holder.

[0003] In order to adjust the position of the blowing opening of the relay nozzle, the height position of the relay nozzle can be set relative to the holder by moving the relay nozzle relative to the holder along the longitudinal axis of the relay nozzle. In addition, the so-called "horizontal" blowing direction can be set by rotating the nozzle around its longitudinal axis. In order to adjust the so-called "vertical" blowing direction, it is known to bend the upper part of the relay nozzle provided with the blowing opening relative to the longitudinal axis. Summary of the invention

[0004] The object of the present invention is to provide a fastening unit for a relay nozzle of an air jet loom, which fastening unit allows easy and repeatable adjustment of the blowing direction with high precision. A further object of the present invention is to provide a relay nozzle system comprising such a fastening unit and a relay nozzle.

[0005] These objects are solved by a fastening unit and a relay nozzle system having the features of claims 1 and 15. Preferred embodiments are defined in the dependent claims.

[0006] According to a first aspect, there is provided a fastening unit for a relay nozzle of an air jet loom having a sley profile extending in a width direction, the fastening unit comprising a first part and a second part, wherein the first part is suitable for being fastened to the sley profile, wherein the second part has a receiving structure defining a first axis and is suitable for receiving the relay nozzle so that the longitudinal axis of the relay nozzle is arranged coaxially with the first axis, and wherein the second part is connected to the first part via a connecting structure so as to be rotatable around a second axis, which is transverse to the first axis and intersects with the first axis.

[0007] In use, the first part is fastened to the sley profile such that the second axis extends transversely, in particular perpendicularly, to a width direction of the sley profile.

[0008] In the context of the present invention, "transverse" is used to describe a certain angle, and perpendicular is used to describe at least almost perpendicular, meaning perpendicular with a certain tolerance. Similarly, "intersecting" is used to describe at least almost intersecting, meaning intersecting with a certain tolerance.

[0009] The longitudinal axis of the relay nozzle accommodated in the second part extends transversely, in particular perpendicularly to the second axis. When the second part with the relay nozzle is rotated about the second axis, adjustment of the blowing direction of the relay nozzle is possible in a transverse direction, in particular perpendicularly to the direction of the initial orientation of the first axis of the relay nozzle, which is called the vertical blowing direction, without necessarily bending the upper part of the relay nozzle. Therefore, the relay nozzle can be made of any suitable material without restrictions on the specific material properties required for the prior art relay nozzles, for which the vertical blowing direction is adjusted by bending the upper part. Therefore, for example, ceramic material or similar materials can be used to manufacture the relay nozzle.

[0010] An advantage of a second axis that intersects or at least nearly intersects the first axis is that, when the second part with the relay nozzle is rotated relative to the first part about the second axis within a limited range of + / -5°, the movement of the tip of the relay nozzle is negligibly small and has no effect or only a tolerable effect on the position of the tip of the relay nozzle along the first axis. Thus, if feasible, it is not necessary to repeat any adjustment of the position of the tip of the relay nozzle along the first axis after rotating the second part with the relay nozzle relative to the first part within a limited range of + / -5°.

[0011] In one embodiment, the second axis intersects the first axis in the region of the containment structure. In other words, the center of rotation for adjusting the vertical blowing direction is in the region of the containment structure. In another embodiment, the second axis intersects the first axis in the region of the blowing port or in the region between the containment structure and the blowing port.

[0012] In one embodiment, the coupling structure comprises three coupling pairs, each coupling pair comprising a slot and a pin, wherein the slot is adapted to accommodate a corresponding pin with clearance, in particular with tangential clearance, wherein one member of each pair is arranged on the first part and the other member of each pair is arranged on the second part, so that in use each pair allows the second part to rotate relative to the first part around the second axis. In particular, in use, one member of each pair is arranged on the first part along a circle around the second axis, and the other member of each pair is arranged on the second part along a corresponding circle around the second axis. All pairs can be arranged along the same circle or different circles as long as the center of rotation of each circle remains around the second axis.

[0013] In one embodiment, all slots are arranged on one of the first part or the second part, and all pins are arranged on the other of the first part and the second part. In other embodiments, some slots and some pins are arranged on one of the first part and the second part, and the associated slots and pins are arranged on the other part.

[0014] The provision of exactly three coupling pairs allows a defined orientation of the second part relative to the first part. However, in other embodiments, the coupling structure comprises more than three coupling pairs. In one embodiment, the slots merge seamlessly, thereby theoretically allowing a 360° rotation, at least without a relay nozzle sandwiched between the first and second parts. However, in other embodiments, the slots are appropriately dimensioned to allow only a small angular adjustment, in particular an adjustment of less than + / - 5°, even without a relay nozzle sandwiched between the first and second parts.

[0015] In an embodiment, a curved slot cooperating with a curved rib or a curved slot cooperating with several pins is provided so that the coupling structure is rotatable about the second axis.

[0016] In one embodiment, the coupling structure is further configured to secure the second portion to the first portion in a selected orientation about the second axis.

[0017] In other embodiments, additional fixing elements are provided. In particular, in one embodiment, the first part has a threaded hole and the second part has a corresponding elongated through hole for fixing the second part to the first part in a selected orientation around the second axis using a fixing bolt. When a separate fixing element is provided, the pin of the coupling structure can be formed as an integral element of one of the first part and the second part, wherein the pin is not accessible from the outside of the fastening unit.

[0018] In one embodiment, the accommodation structure in the second part is a groove, in particular a circular arc groove or a V-shaped groove, wherein the groove is configured so that the relay nozzle accommodated in the groove protrudes from the second part, and wherein the first part has a groove suitable for accommodating the protruding portion of the relay nozzle with clearance. In other words, the relay nozzle can be clamped between the first part and the second part, wherein the relay nozzle accommodated in the groove of the first part can move relative to the first part within a limited range together with the second part.

[0019] In one embodiment, the recess is adapted to accommodate the relay nozzle with clearance such that the relay nozzle can be rotated about the second axis by approximately + / - 5°.

[0020] In one embodiment, the groove has a flat base surface and a side flange inclined relative to the flat base surface, wherein a received relay nozzle abuts the flat base surface. In use, the relay nozzle received between the first part and the second part abuts the flat base surface, wherein the flat surface allows the relay nozzle to rotate about the second axis, and wherein the side flange limits movement of the relay nozzle relative to the first part.

[0021] In one embodiment, the first part is adapted to be fastened to the sley profile in a settable position along the width direction of the sley profile.Therefore, by setting the position of the first part relative to the sley profile, the position of the relay nozzle along the width direction is adjustable.

[0022] In one embodiment, the first part has a sley side, wherein the sley side faces the sley profile in use, and wherein the second part is coupled to the first part on an opposite side of the sley side.

[0023] In other words, the sley side of the first part is defined as the side of the first part facing the sley profile in use.The first part is designed such that the second part and the sley profile are arranged at two opposite sides of the first part in use.

[0024] In one embodiment, a protruding tongue is provided on the sley side of the first part, which is suitable for fastening the first part to a sley profile having a slot using a slotted nut. This allows the first part to be adjustably fastened to the sley profile along the slot, wherein the slot preferably extends in the width direction of the sley profile.

[0025] In one embodiment, the first part has a first through hole allowing insertion of a bolt for a slotted nut, wherein the second part has a coincident second through hole allowing access to the bolt for the slotted nut using a tool (e.g., an Allen wrench). The second through hole in an embodiment is a slotted through hole allowing access to the bolt at different angular orientations of the second part relative to the first part about the second axis.

[0026] In one embodiment, the first part has a first contact surface on the sley side suitable for contacting the sley profile, wherein the first contact surface is inclined at an inclination angle relative to a second contact surface of the first part perpendicular to the second axis, and the relay nozzle contacts the first part at the second contact surface. In another embodiment, the accommodation structure of the second part is a hole, which is suitable for accommodating the relay nozzle, wherein the second part contacts the first part at the second contact surface. In other embodiments, the accommodation structure of the second part is a groove, wherein the relay nozzle accommodated in the groove protrudes from the groove and contacts the first part. For example, in an embodiment, the second contact surface is a flat base surface of the groove provided in the first part, which is contacted by the accommodated relay nozzle in use.

[0027] In one embodiment, the fastening unit is adapted to be fastened to the sley profile in a first orientation and in a second orientation flipped 180° about the second axis relative to the first orientation, wherein the accommodation structure is adapted to accommodate the relay nozzle in each of the first orientation and the second orientation so that the tip of the accommodated relay nozzle points upward. In particular, in the case where the first portion is provided with a first contact surface that is tilted relative to the second contact surface by the tilt angle, flipping the fastening unit by 180° allows adjusting the inclination of the relay nozzle relative to the surface of the sley profile contacted by the first contact surface, and thus allows adjusting the distance between the blowing port of the relay nozzle and the reed.

[0028] In one embodiment, the receiving structure of the second part is provided with a protrusion, in particular a circular curved protrusion adapted to cooperate with a recess, in particular a circular recess at the periphery of the relay nozzle. In this case, the relay nozzle can only be arranged in a plurality of discrete axial positions in the receiving structure. The advantage is that the discrete axial positions can be pre-set and the relay nozzle cannot move when the fixing bolts for fixing the second part to the first part are loosened.

[0029] According to a second aspect, there is provided a relay nozzle system comprising a fastening unit as described above and a relay nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Throughout the drawings, the same elements will be marked with the same reference numerals.

[0031] Figure 1 A sley of an air-jet weaving machine is shown comprising a sley profile, wherein several relay-nozzle systems are fastened to the sley profile, each relay-nozzle system comprising a relay nozzle and a fastening unit.

[0032] Figure 2 The isolated relay nozzle system is shown in perspective view.

[0033] Figure 3 The exploded view shows Figure 2 Relay nozzle system.

[0034] Figure 4 Shown in perspective Figure 2 The first part of the fastening unit of the relay nozzle system.

[0035] Figure 5 The plan view, shown on an enlarged scale, shows Figure 4 The first part of .

[0036] Figure 6 Shown in perspective Figure 2 The second part of the fastening unit of the relay nozzle system.

[0037] Figure 7 The plan view, shown on an enlarged scale, shows Figure 6 The second part of

[0038] Figure 8 Shows the installation of the relay nozzle to the sley profile in two different orientations Figure 2 Relay nozzle system.

[0039] Fig. 9 The side view shows the mounting to the sley profile. Figure 2 Relay nozzle system.

[0040] Fig.10 The side view shows the mounting to the sley profile. Fig. 9 Relay nozzle system with the fastening unit flipped 180°. DETAILED DESCRIPTION

[0041] Figure 1 A sley 1 of an air jet weaving machine (not shown) is shown. The sley 1 comprises a sley profile 10 having a slot 12, wherein several relay nozzle systems 2 are fastened to the sley profile 10, each relay nozzle system 2 comprising a relay nozzle 3 and a fastening unit 4. Each relay nozzle 3 is fastened to the sley profile 10 by means of an associated fastening unit 4, so that the relay nozzles 3 are aligned in a line parallel to a width direction 14 of the sley profile 10.

[0042] Figure 2 and Figure 3 The relay nozzle system 2 comprising the relay nozzle 3 and the fastening unit 4 is shown in a perspective view and in an exploded view. Figure 2 and Figure 3 As shown in FIG. 4 , the fastening unit 4 includes a first portion 41 and a second portion 42 , wherein the relay nozzle 3 may be sandwiched between the first portion 41 and the second portion 42 .

[0043] Figure 4 and Figure 5 The first portion 41 is shown alone. Figure 6 and Figure 7 The second portion 42 is shown alone.

[0044] In the embodiment shown, in use, the first part 41 of the fastening unit 4 is fastened to the sley profile 10. The side of the first part 41 facing the sley profile 10 is called the sley side 410. The second part 42 is coupled to the first part 41 at a side 411 opposite to the sley side 410.

[0045] In the embodiment shown, a protruding tongue 412 is provided on the sley side 410 of the first part 41. In use, the protruding tongue 412 is inserted into the slot 12 of the sley profile 10, and the first part 41 is fastened to the sley profile 10 using a slotted nut 51 and a bolt 52 (see FIG. Figure 3 ). The first part 41 has a first through hole 413 that allows the bolt 52 to be inserted. In order to allow access to the bolt 52 after the second part 42 is coupled to the first part 41, the second part 42 is provided with a second through hole 420 that allows access to the bolt 52 using a tool, in particular an Allen wrench (not shown). When the bolt 52 is loosened, the first part 41 is loosened along the width direction 14 (see FIG. 1 ) of the sley profile 10. Figure 1 ) is adjustable, as indicated by Figure 2 Indicated by arrow 101 in FIG.

[0046] In addition, if Figure 2 As indicated by the three arrows 102 , 103 , 104 in FIG. 4 , in the illustrated embodiment, the position of the relay nozzle 3 can be adjusted with three degrees of freedom relative to the first part 41 .

[0047] like Figure 3 , Figure 6 and Figure 7 As best shown in , the second part 42 has a receiving structure 421 defining the first axis 105 and is suitable for receiving the relay nozzle 3 so that the longitudinal axis 31 of the relay nozzle 3 is arranged coaxially with the first axis 105. In the embodiment shown, the receiving structure 421 is a groove, wherein the sides of the groove are suitable for cooperating with the mounting sleeve 33 of the relay nozzle 3, so that the relay nozzle 3 can be received in the receiving structure 421 without clearance, or even slightly oversized, or with only negligible clearance. As shown in Figure 3 As best seen in FIG. 4 , the receiving structure 421 is predominantly V-shaped and is suitable for receiving the outer radius of the mounting sleeve 33 of the relay nozzle 3 without play or with only negligible play.

[0048] like Figure 3 , Figure 4 and Figure 5 As best shown in FIG. 4 , the first part 41 has a groove 415. The groove 415 is suitable for accommodating the relay nozzle 3 with clearance. In the embodiment shown, the groove 415 has a flat base surface 416 and two side flanges 417 inclined relative to the flat base surface 416, wherein when the relay nozzle 3 is clamped between the first part 41 and the second part 42, the relay nozzle 3 abuts the flat base surface 416.

[0049] The second part 42 - with or without the relay nozzle 3 arranged in the receiving structure - can be coupled to the first part 41 via the coupling structure 7 so as to be rotatable about the second axis 106 (in Figure 5 and Figure 7 ), the second axis 106 is transverse to (particularly perpendicular to) the first axis 105 (see Figure 7 ), and intersects the first axis 105. In the illustrated embodiment, the second axis 106 intersects the first axis 105 in the region of the receiving structure 421.

[0050] In the embodiment shown, the coupling structure 7 comprises three coupling pairs, each coupling pair comprising a slot 71 and a pin 72, wherein each slot 71 is adapted to receive with clearance a corresponding pin 72. The slots 71 are shaped such that there is a tangential clearance in the direction of rotation about the second axis 106, but only a small clearance in the radial direction.

[0051] More specifically, in the embodiment shown, the first part 41 is provided with three slots 71 on the side 411 opposite to the sley side 410, which slots 71 are arranged along a circle 108 around the second axis 106. Similarly, the second part 42 is provided with three pins 72 projecting from the second part 42 on the side facing the first part 41 in use. The pins 72 are arranged along a circle around the second axis 106.

[0052] When the second part 42 is connected to the first part 41 by inserting the pin 72 into the narrow slot 71, the relay nozzle 3 accommodated in the accommodating structure 421 of the second part 42 and the groove 415 of the first part 41 can be rotated together with the second part 42 around the second axis 106 relative to the first part 41 within a limited range (for example, approximately + / - 5°).

[0053] like Figure 3 As best shown in FIG. 4 , the second portion 42 can be fixed to the first portion 41 in a selected orientation using a fixing bolt 60 that is inserted from the outside of the fastening unit 4 through an elongated through hole 422 provided at the second portion 42 and screwed into a threaded hole 414 provided at the first portion 41. In the illustrated embodiment, a washer 61 is provided between the fixing bolt 60 and the second portion 42.

[0054] Figure 8 A relay nozzle system 2 is shown mounted to a sley profile 10, wherein a second part 42 is secured to a first part 41 in a first orientation shown in solid lines and in a second orientation offset by an angle A from the first orientation shown in dashed lines.

[0055] like Figure 8 As shown in FIG. 1 , rotating the second part 42 with the relay nozzle 3 around the second axis 106 allows adjusting the so-called vertical blowing direction of the relay nozzle 3. Because the second axis 106 intersects the first axis 105 (see FIG. 1 ), the second part 42 with the relay nozzle 3 can be rotated around the second axis 106 to adjust the so-called vertical blowing direction of the relay nozzle 3. Figure 7), and thus intersects with the longitudinal axis 31 of the relay nozzle 3, so when the vertical blowing direction is adjusted, the height position of the blowing port 30 (i.e. the distance of the blowing port 30 from the sley profile 10) remains substantially the same. In use, the first part 41 is fastened to the sley profile 10. The second part 42 is mounted to the first part 41, wherein the orientation of the second part 42 and the relay nozzle 3 relative to the first part 41 around the second axis 106 is settable.

[0056] Before tightening the fixing bolt 60 or after loosening the fixing bolt 60, the height position of the relay nozzle 3 relative to the fastening unit 4 can also be set, such as by Figure 2 As indicated by arrow 103 in FIG. Figure 3 As best shown in FIG. 4 , in the embodiment shown, the relay nozzle 3 is provided with several lines 34 for indicating the height of the relay nozzle 3 relative to the fastening unit 4 , in particular relative to the second portion 42 of the fastening unit 4 .

[0057] In an alternative embodiment, instead of providing a visible line 34 on the relay nozzle 3, grooves such as circular grooves are provided on the relay nozzle. In one embodiment, these grooves are adapted to cooperate with protrusions such as curved protrusions, in particular circular curved protrusions provided on the outer edge 35 of the second part 42 of the fastening unit 4. In this case, the relay nozzle 3 can only be set in discrete axial positions along the longitudinal axis 31 of the relay nozzle 3. The advantage is that the discrete axial positions can be pre-set and the relay nozzle 3 is fixed in the second part 42 when the fixing bolts 60 for fixing the second part 42 to the first part 41 are not tightened.

[0058] Furthermore, before tightening the fixing screw 60 or after loosening the fixing screw 60, the orientation around the longitudinal axis 31 of the relay nozzle 3 can be set, such as by Figure 2 As indicated by arrow 104 in FIG.

[0059] like Fig. 9 and Fig.10 As shown in FIG. 1 , in the embodiment shown, the fastening unit 4 is designed to be selectively used for Fig. 9 The first orientation shown in Fig.10 , wherein the fastening unit 4 is flipped 180° around the second axis 106. Fig. 9 and Fig.10 As shown in , the fastening unit 4 can be fastened to the sley profile 10 in a first orientation or a second orientation, wherein in each orientation the relay nozzle 3 can be clamped between the first part 41 and the second part 42 so that the tip of the relay nozzle 3 points upwards.

[0060] like Figure 4 , Fig. 9 and Fig.10 As can be seen in the embodiment shown, the first portion 41 is wedge-shaped, wherein the first portion 41 has a first contact surface 418 at the sley side 410, adapted to contact the sley profile 10 and a flat base surface 416 at a side 411 opposite to the sley side 410, wherein the first contact surface 418 is inclined at an inclination angle relative to the flat base surface 416. The flat base surface 416 of the groove 415 (see Figure 4 and Figure 5 ) may extend parallel to the outer surface 419. The longitudinal axis 31 of the relay nozzle 3 sandwiched between the first portion 41 and the second portion 42 extends parallel to the flat base surface 416 and is not parallel to the first contact surface 418.

[0061] In one embodiment (not shown), the first contact surface 418 is inclined at an inclination angle relative to a second contact surface of the first portion 41, which is perpendicular or almost perpendicular to the second axis 106, at which the relay nozzle 3 contacts the first portion 41. In the embodiment shown, the first contact surface 418 is inclined at an inclination angle relative to a second contact surface of the first portion 41, which is perpendicular or almost perpendicular to the second axis 106, formed by a flat base surface 416 of the groove 415, at which the second contact surface of the first portion 41 is formed, at which the relay nozzle 3 contacts the first portion 41. Thus, the flat base surface 416 of the groove 415 for the relay nozzle 3 is inclined at an inclination angle of several degrees relative to the first contact surface 418. For example, the inclination angle is between 0.5° and 5°.

[0062] Therefore, when the fastening unit 4 is mounted on Fig.10 In the second orientation shown in FIG. , the fastening unit 4 is relative to Fig. 9 The first orientation shown in the figure is flipped 180° around the second axis 106, and the inclination of the relay nozzle 3 relative to the sley profile 10 is changed, wherein the distance between the blowing port 30 and the reed 8 can be changed. Thus, the inclination angle of the relay nozzle 3 can be changed by twice the inclination angle.

[0063] This allows the relay nozzle 3 to be mounted in different positions of the sley profile 10 in the width direction 14 relative to the reed 8 using the same fastening unit 4. In other words, the top of the relay nozzle 3 provided with the blowing openings 30 can be arranged close to the reed 8 or further away from the reed 8 relative to the reed 8 arranged on the sley profile 10. Obviously, after turning over by 180°, the height of the relay nozzle 3 must be adjusted relative to the second part 42, in particular the position of the wire 34 relative to the second part 42.

Claims

1. A fastening unit for a relay nozzle (3) of an air jet loom having a sley profile (10) extending in a width direction (14), the fastening unit (4) comprising a first part (41) and a second part (42), wherein the first part (41) is suitable for being fastened to the sley profile (10), wherein the second part (42) has a receiving structure (421) defining a first axis (105) and is suitable for receiving the relay nozzle (3), so that the longitudinal axis (31) of the relay nozzle (3) is arranged coaxially with the first axis (105), and wherein the second part (42) is connected to the first part (41) via a connecting structure (7) so as to be rotatable about a second axis (106), the second axis (106) being transverse to the first axis (105) and intersecting the first axis (105).

2. The fastening unit according to claim 1, characterized in that: The second axis (106) intersects the first axis (105) in the region of the receiving structure (421).

3. The fastening unit according to claim 1 or 2, characterized in that: The coupling structure (7) comprises three coupling pairs, each coupling pair comprising a slot (71) and a pin (72), wherein the slot (71) is adapted to receive the corresponding pin (72) with clearance, wherein one member of each pair is arranged on the first part (41) and the other member of each pair is arranged on the second part (42), so that in use, each pair allows the second part (42) to rotate relative to the first part (41) about a second axis (106).

4. The fastening unit according to claim 1, 2 or 3, characterized in that: The first portion (41) has a threaded hole (414) and the second portion (42) has a corresponding elongated through hole (422) for securing the second portion (42) to the first portion (41) in a selected orientation about the second axis (106) using a fixing bolt (60).

5. The fastening unit according to any one of claims 1 to 4, characterized in that: The accommodating structure (421) in the second part (42) is a groove, wherein the groove is configured so that the relay nozzle (3) accommodated in the groove protrudes from the second part (42), and wherein the first part (41) has a groove (415) suitable for accommodating the protruding part of the relay nozzle (3) with a gap.

6. The fastening unit according to claim 5, characterized in that: The groove (415) is suitable for accommodating the relay nozzle (3) with clearance so that the relay nozzle (3) can be rotated about the second axis (106) by approximately + / - 5°.

7. The fastening unit according to claim 5 or 6, characterized in that: The groove (415) has a flat base surface (416) and a side flange (417) inclined relative to the flat base surface (416), wherein the received relay nozzle (3) abuts against the flat base surface (416).

8. The fastening unit according to any one of claims 1 to 7, characterized in that The first portion (41) is adapted to be fastened to the sley profile (10) in a settable position along the width direction (14) of the sley profile (10).

9. The fastening unit according to any one of claims 1 to 8, characterized in that: The first part (41) has a sley side (410), wherein the sley side (410) faces the sley profile (10) in use, and wherein the second part (42) is coupled to the first part (41) at a side (411) opposite the sley side (410).

10. The fastening unit according to claim 9, characterized in that A protruding tongue (412) is provided on the sley side (410) of the first part (41), said protruding tongue (412) being suitable for fastening the first part (41) to a sley profile (10) having a slot (12) using a slotted nut (51).

11. The fastening unit according to claim 10, characterized in that: The first part (41) has a first through hole (413) which allows the insertion of a bolt (52) for a slotted nut (51), wherein the second part (42) has a coincident second through hole (420) which allows access to the bolt (52) using a tool.

12. The fastening unit according to any one of claims 9 to 11, characterized in that The first part (41) has a first contact surface (418) on the sley side (410) suitable for contacting the sley profile (10), wherein the first contact surface (418) is inclined at an inclination angle relative to a second contact surface of the first part (41), in particular relative to a flat base structure (416) of the first part (41), and the relay nozzle (3) contacts the first part (41) at the second contact surface.

13. The fastening unit according to any one of claims 1 to 12, characterized in that The fastening unit (4) is suitable for being fastened to the slay profile (10) in a first orientation and in a second orientation flipped 180° around a second axis (106) relative to the first orientation, wherein the accommodating structure (421) is suitable for accommodating the relay nozzle (3) in each of the first orientation and the second orientation so that the tip of the accommodated relay nozzle (3) points upward.

14. The fastening unit according to any one of claims 1 to 13, characterized in that The receiving structure (421) of the second part (42) is provided with a protrusion, which is suitable for cooperating with a groove at the periphery of the relay nozzle (3).

15. A relay nozzle system comprising a fastening unit (4) according to any one of claims 1 to 14 and a relay nozzle (3).

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