YARN CLEARER AND CUTTING DEVICE FOR A YARN CLEARER

Abstract

The present invention relates to a yarn clearer for a workstation of a textile machine with a cutting device for clearing out defects from a yarn as well as a cutting device for a yarn clearer which can be arranged at a workstation of a textile machine, with a housing body having a housing basic body, a housing cover which covers the housing basic body at least in sections and together with the housing basic body delimits a housing interior and a first housing opening and a cutting device with a cutting medium carrier having a cutting knife, a cutting medium drive arranged in the housing interior for adjusting the cutting medium carrier between a cutting position remote from the housing and a rest position close to the housing and a drive element connecting the cutting medium drive and the cutting medium carrier and adjustably arranged in the first housing opening. In order to provide a yarn clearer with a cutting device as well as a cutting device which ensure reliable separation of the yarn when required, there is provision for the housing body to have a bearing section for adjustably receiving the cutting medium carrier and a second housing opening adjacent to the bearing section with an opening edge extending perpendicularly to the adjustment direction of the cutting medium carrier and abutting the cutting medium carrier.

Claims

1. A cutting device for a yarn clearer (10), configured to be arranged at a workstation of a textile machine, comprising: a housing body (14), comprising: a housing basic body (11); a housing cover (15) configured to: cover the housing basic body (11), at least in sections; and delimit a housing interior (16), together with the housing basic body (11); a first housing opening (23) connected to the housing interior (16); and a cutting device (1), comprising: a cutting medium carrier (5) comprising a cutting knife (4); a cutting medium drive (6), arranged in the housing interior (16), configured to adjust the cutting medium carrier (5) between a cutting position remote from the housing and a rest position close to the housing; and a drive element (21), configured to connect the cutting medium drive (6) and the cutting medium carrier (5), wherein the drive element (21) is adjustably arranged in the first housing opening (23), wherein the housing body (14) comprises: a bearing section (27) configured to adjustably receive the cutting medium carrier (5); and a second housing opening (24), adjacent to the bearing section (27), comprising an opening edge (26), extending perpendicular to an adjustment direction of the cutting medium carrier (5), and abutting the cutting medium carrier (5).

2. The cutting device according to claim 1, wherein, in a region of the second housing opening (24), the housing body (14) is configured for flush arrangement of an end face of the cutting medium carrier (5) in the rest position.

3. The cutting device according to claim 1, wherein the first housing opening (23) abuts the drive element (21) with an opening edge (26) extending perpendicular to an adjustment direction of the drive element (21).

4. The cutting device according to claim 1, wherein the beating section (27): is configured for forming an expansion range (28); and comprises at least one wall section (25) arranged at a distance from the cutting medium carrier (5).

5. The cutting device according to claim 4, wherein the cutting medium carrier (5) comprises a protrusion (13) projecting into the expansion region (28) and adjustable therein between the rest position and the cutting position.

6. The cutting device according to claim 1, wherein the housing body (14) has a ventilation opening (22) ventilating the housing interior (16), which is preferably arranged on an underside of the housing body (14).

7. The cutting device according to claim 1, wherein one or more of the following surfaces comprise a polished surface: inner walls of the bearing section (27); outer surfaces of the cutting medium carrier (5); and outer surfaces of the drive element (21).

8. The cutting device according to claim 1, wherein the housing basic body (11) comprises a flat housing basic body inner wall, and the housing cover (15) comprises a housing cover edge (31) standing circumferentially on the housing basic body inner wall and a housing cover basic body adjoining the housing cover edge (31).

9. The cutting device according to claim 8, wherein the housing cover (15): is configured for forming the bearing section (27); and comprises housing cover bars (30) projecting from the housing cover basic body in a direction of the housing basic body (11) and resting on the housing basic body inner wall.

10. A yarn clearer for a workstation of a textile machine, comprising: a cutting device configured for clearing out defects from a yarn, wherein the cutting device is designed in accordance with claim 1.

Description

[0034] An embodiment example of the present invention is explained below with reference to the drawings. In the drawings:

[0035] FIG. 1 shows an exploded version of a perspective view of an embodiment of a cutting device that can be arranged in a housing body;

[0036] FIG. 2 shows a perspective view of a housing cover that can be arranged on a flat housing body for receiving a cutting medium drive and a cutting medium carrier of the cutting device of FIG. 1, and

[0037] FIG. 3 shows a perspective view of a yarn clearer.

[0038] FIG. 1 shows a perspective view of an embodiment of a cutting device 1 with a cutting medium drive 6, a drive element 21 and a cutting medium carrier 5, on which a cutting knife 4 having a cutting edge 20 is arranged.

[0039] By means of the cutting medium drive 6, the cutting medium carrier 5 can be adjusted from the rest position shown in FIG. 1 into a cutting position not shown here, in which the cutting edge 20 engages with a stop surface 3 of an anvil 2 arranged on an anvil carrier 7, and cuts a yarn (not shown here) located in between.

[0040] The anvil 2 rests with an underside 17 on an upper side 19 of a fastening section 18 of the anvil carrier 7 and is screwed to this via a fastening screw 9, which extends through a through-bore 12 in the anvil 2 into a threaded hole 8 on the fastening section 18. According to an embodiment not shown, the fastening screw 9 can be screwed into a housing base not shown.

[0041] FIG. 3 shows a perspective view of a yarn clearer 10 with a housing body 14 formed from a housing cover 15 and a housing basic body 11. The housing basic body 11, which is part of the yarn clearer 10, provides a flat housing basic body inner wall to form the housing body 14, which is covered by the housing cover 15 and thus delimits a housing inner space 16 from the surroundings of the yarn clearer 10. As shown in FIG. 2, the housing cover 15 rests on the inner wall of the housing basic body with a housing cover edge 31 and housing bars 30. To form the cutting device consisting of the cutting device 1 and the housing body 14, the cutting device 1 is arranged in sections within the housing body 14, with the cutting knife 4 on the cutting medium carrier 5 projecting from the housing body 14 in the direction of the stop surface 3 of the anvil 2 in the rest position shown. During operation of the yarn clearer, a yarn (not shown here) runs in the area between the stop surface 3 of the anvil 2 and the cutting edge 20 of the cutting knife 4. If a yarn cut is to be made, the cutting knife 4 is moved from the rest position shown to the cutting position in which the cutting edge 20 rests against the stop surface 3 of the anvil 2 and cuts through the yarn in between.

[0042] The cutting medium drive 6 of the cutting device 1 is arranged inside the housing interior 16 of the housing cover 15. The cutting medium drive 6 is connected via the drive element 21 to the cutting medium carrier 5, which is adjustable between the rest position and the cutting position within a bearing section 27 of the housing cover. In this case, the drive element 21 projects through a first housing opening 23 of the housing cover 15, so that when the cutting medium drive 6 is activated, the cutting medium carrier 5 is displaced within the bearing section 27 between the rest position and the cutting position, the cutting medium carrier 5 being displaced within a second housing opening 24 to the cutting position, in which the cutting edge 20 of the cutting knife 4 rests against the stop surface 3 of the anvil 2 at a distance from the outer wall of the housing cover 15.

[0043] The second housing opening 24 and first housing opening 23 of the housing cover 15, which are arranged one behind the other in the adjustment direction, are designed in such a way that they rest against the drive element 21 and the cutting medium carrier 5 with a circumferential opening edge 26, so that any free fibres present in the area in front of the second housing opening 24 do not enter the bearing section 27.

[0044] The bearing section 27 further has a wall section 25 spaced apart from an upper side 29 of the cutting medium carrier 5, thereby forming an expansion region 28 in which any free fibres that may penetrate are collected due to the existing pressure difference and are not moved on towards the first housing opening 23.

[0045] The cutting medium carrier 5 has a bar-like protrusion 13 which extends over the width of the expansion range 28—viewed transversely to the adjustment direction—and projects into the latter, so that any free fibres arranged in the expansion range 28 can be moved or pushed out of the second housing opening 24 by the protrusion 13 when the cutting medium carrier 5 is adjusted from the rest position into the cutting position.

[0046] On a housing underside, the housing cover 15 has a ventilation opening 22 through which there is a fluidity connection between the housing interior 16 and the surroundings, so that when the drive element 21 is moved from the rest position to the cutting position, air from the surroundings of the housing cover 15 can flow into the housing interior 16 and counteract the formation of vacuum.

[0047] The anvil carrier 7 protrudes from the housing body 14 and with the anvil 2 it forms a stop surface 3 opposite the cutting edge 20 of the cutting knife 4, with the yarn being passed between the housing cover 15 and the anvil 2 during operation of the yarn clearer 10.

TABLE-US-00001 List of reference signs 1 Cutting device 2 Anvil 3 Stop surface 4 Cutting knife 5 Cutting medium carrier 6 Cutting medium drive 7 Anvil carrier 8 Threaded hole 9 Fastening screw 10 Yarn clearer 11 Housing basic body 12 Through-bore 13 Protrusion 14 Housing body 15 Housing cover 16 Housing interior 17 Underside 18 Fastening section 19 Upper side 20 Cutting edge 21 Drive element 22 Ventilation opening 23 First housing opening 24 Second housing opening 25 Wall section 26 Opening edge 27 Bearing section 28 Expansion range 29 Upper side 30 Housing bar 31 Housing cover edge