EP1280950B1 - Tuck-in selvedge motion for a weaving machine - Google Patents

Abstract

A selvage bracket (15) including a rotatable insert (33) is used in a weaving machine selvage insertion device (1), the insert is connected to at least one source of compressed air and includes at least one blowing aperture (37). The direction of blowing of the aperture is adjustable by changing the position of the insert relative to the holder.

Description

The invention relates to an edge insert for a loom for insertion one end of a weft thread into a shed with a holder, with means for receiving the end of the inserted into a shed Weft thread and for blowing the end into a subsequently formed Shed is provided, wherein the means for blowing over with a a control unit controllable valve connected to a compressed air source are.

Such an edge insert is known from US 4,957,144. The end the registered weft thread is first held pneumatically and then blown through blow holes in a shed. The blowing openings are provided in a laterally arranged by the shed holder. An edge inserter is also known from US 1 426 351, in which the end of a weft thread in a guide element of a holder taken and then by means of a blowing device in the subsequently formed shed is blown. The blowing device has a nozzle arranged at an angle to the stop edge of the fabric is to the held in the guide member end of the To blow weft thread towards the stop edge. Another Device is also known from US 2 267 287, in which several Nozzles are provided, each with a different blowing direction, to the Deflecting end of a weft thread and towards the stop edge to blow.

The invention is based on the object, an edge insert of the above so that it can be designed for any tissue suitable is.

This object is achieved in that the holder with at least one rotatably arranged insert is provided with the compressed air source is connectable and has at least one blow opening whose position is adjustable.

By changing the position of the blow opening, the edge insert can be adjusted to the fabric and / or to be woven weft in a simple Adapt way. The position of the blow opening can thereby changed Be that use against one use with another Blow opening or replaced with a blow opening in another place and / or that the use is adjusted and in particular in its Angle position is rotated. This is an advantage when changing to weaving tissue. In addition, the insert can also with wear be replaced without the entire holder or the entire Edge insert must be replaced and / or removed.

In a preferred embodiment it is provided that the insert a connectable to a compressed air source axial channel and at least having a substantially radially directed blow opening. Such Training is beneficial to the end of the weft in the shed to blow.

In a preferred embodiment it is provided that the holder is provided with a guide slot for weft threads, and that the or the inserts are arranged in front of the end of the guide slot. It is advantageous if at least a part of the weft threads coming in contact components with wear-resistant covers is provided. This makes it possible, such covers easily replace without the entire holder or the entire device must be replaced. The use can also be a wearing part be replaced if necessary.

In a further embodiment of the invention, it is provided that the holder with a pneumatic holding device for the end of a weft thread is provided. This allows the weft in a specific Hold position from which he then by means of the blow opening in the shed blown. This pneumatic holding device is also suitable to keep the end of a weft thread safe after cutting it off.

In a preferred embodiment of the invention is provided that on the side facing away from the tissue of the holder, a cutting device for weft threads is attached. This can change the length of the by means of the edge insert into the advertising compartment to be inserted end of the Weft can be defined exactly. It is advantageous if the Cutting device mounted at an adjustable distance relative to the holder is such that the length of the weft thread to be dropped into the shed can be adjusted.

In a further embodiment of the invention, it is provided that the holder is provided with at least one blow opening, which is in the range of the tissue facing side wall is located. Such a blow opening allows, in addition to blowing on the end of the Weft thread to direct one or more jets of air onto the warp threads, around the edge of the shed formed by the warp threads for the Blowing in the end of a weft to prepare. It is advantageous if the at least one in the region of the side wall of the holder located blowing opening is provided in an insert, which is for adjusting the position of the blow opening is rotatable.

In a further embodiment of the invention it is provided that the at least an insert, with the at least one blow opening for insertion the end of the weft thread is provided in a shed, a preferably assigned by the machine control controlled drive is. The adjustment of the insert can by the operator on a Input unit of a control unit are made after the Operator by inserting the formed in the weft threads Has examined tissue edge. The setting of the insert can also with the help of data generated by a transmitter unit and be passed on to the control unit, for example, depending on from a captured by a camera image of the inserted End of the weft.

Fig. 1

zeigt eine schematische Draufsicht auf eine Luftdüsenwebmaschine mit mehreren erfindungsgemäßen Kanteneinlegern,

Fig. 2

eine perspektivische Ansicht in Richtung des Pfeiles F2 der Fig. 1 auf einen Kanteneinleger mit einer Schneidvorrichtung,

Fig. 3

eine Teilseitenansicht in Richtung des Pfeiles F3 der Fig. 1 auf einen Kanteneinleger,

Fig. 4

einen Schnitt entlang der Linie IV-IV der Fig. 3,

Fig. 5

einen Schnitt entlang der Linie V-V der Fig. 4,

Fig. 6

einen Schnitt entlang der Linie VI-VI der Fig. 5,

Fig. 7

eine Ansicht in Richtung des Pfeiles F7 der Fig. 3,

Fig. 8

einen Schnitt ähnlich Fig. 4 einer abgewandelten Ausführungsform,

Fig. 9

einen Schnitt ähnlich Fig. 4 einer weiteren abgewandelten Ausführungsform,

Fig. 10

einen Schnitt ähnlich Fig. 6 durch eine weitere abgewandelte Ausführungsform,

Fig. 11

eine Ansicht ähnlich Fig. 3 auf eine weitere Ausführungsform,

Fig. 12

einen Schnitt entsprechend Fig. 5 durch die Ausführungsform nach Fig. 11 und

Fig. 13

einen Schnitt entlang der Linie XIII-XIII der Fig. 11.

Further advantages and features of the invention will become apparent from the following description of the embodiments illustrated in the drawings.

Fig. 1

shows a schematic plan view of an air jet loom with a plurality of edge inserts according to the invention,

Fig. 2

1 is a perspective view in the direction of the arrow F2 of FIG. 1 of an edge insert with a cutting device,

Fig. 3

2 a partial side view in the direction of the arrow F3 of FIG. 1 on an edge inserter,

Fig. 4

a section along the line IV-IV of Fig. 3,

Fig. 5

a section along the line VV of Fig. 4,

Fig. 6

a section along the line VI-VI of Fig. 5,

Fig. 7

a view in the direction of arrow F7 of Fig. 3,

Fig. 8

a section similar to FIG. 4 of a modified embodiment,

Fig. 9

a section similar to FIG. 4 of a further modified embodiment,

Fig. 10

a section similar to FIG. 6 through a further modified embodiment,

Fig. 11

3 is a view similar to a further embodiment,

Fig. 12

a section corresponding to FIG. 5 by the embodiment of FIG. 11 and

Fig. 13

a section along the line XIII-XIII of FIG. 11th

On the air jet loom shown in Fig. 1 are side by side two woven fabrics 2, 3 woven, to which a total of four inventive Edge depositor 1 are assigned. For each edge inserter 1 is a controllable cutting device 7 provided by the control unit 6 is controlled. For the two middle edge insert 1 is a common cutting device 7 is provided. The edge inserter 1 and the cutting devices 7 are running in a direction transverse to the weaving direction Strut 8 slidably attached. The air jet loom contains further a sley 9, with a plurality of Hauptblasdüsen 10 and a Reed 11 is provided. The registered weft threads are at a Stop edge 12 and 13 of the fabric 2 and 3 by means of the reed 11th struck. To enter the weft threads is made of warp threads 14 respectively formed by means not shown shedding elements, a shed. Each edge inserter 1 is controllable via a control unit 6 Valve connected to a compressed air source.

The edge insert 1 shown in FIG. 2 has a holder 15 which by means of a support 16 in a manner not shown on the strut. 8 is attached. The holder 15 is formed with a guide slot 17 formed by guides provided, which is against the stop direction V-shaped extended and in a substantially parallel to the plane of the tissue running, narrow slot passes. The guides 17 lead the Weft in the holder 15. The guides 17 are wear-resistant Covers 18 provided, for example, covers made of ceramic or Stole.

On the holder 15, a cutting device 7 is attached. This cutting device 7 has a stationary shear blade 20 which with screws 22 is attached to an intermediate element 21, which in turn with screws 23 is attached to the holder 15. A movable shear blade 24 is by means a bolt 25 connected to a lever 26. The lever 26 is by means of a ball joint 27 attached to the intermediate element 21. The lever 26 is connected to a controllable drive motor 28, which via a Intermediate member 29 is fixed to the support 16 is between the lever 26 and the movable shear blade 24, a leaf spring 30 is arranged, which presses the movable shear blade 24 against the stationary shear blade 20. By means not shown spacers between the holder 15th and the intermediate element 21, the distance between the Schneidvor direction 7 and the holder 15 are adjusted in the weft direction. by virtue of of the ball joint 27 that can be performed without the case Drive motor 28 is offset. An adjustment can also be done by an intermediate element 21 having a different thickness is used. at the illustrated embodiment, the intermediate element 21 with Oblong holes 31 provided for the screws 23, so that the position of the Cutting device 7 can also be adjusted transversely to the weft direction.

As shown in FIGS. 3 to 7, the holder 15 is provided with means 32 for Blowing the end of a weft thread provided in a shed. These Means 32 include a cylindrical insert 33 rotatably mounted in the holder 15 arranged and by means of a fixing screw 34 in a predetermined Angular position on the holder 15 can be fixed. The insert 33 has an axial passage 35 which communicates with a Druckluftzuführkanal 36 of the holder 15 is connected via radial bores 38. The axial channel 35 leads to Blasöffnungen 37 of the insert 33, located in the region of the guide slot of the holder (Fig. 6). The blow opening is essentially directed radially.

As can be seen from Fig. 5, the insert 33 has at least two opposite Radial holes 38, making the same use 33 for Right or left of a fabric arranged edge insert 1 used is. In the area above and below the radial bores 38 are sealing rings 40, 41 are provided. That of the blow opening 37 facing away End of the axial channel 35 is by means of a sealing element 39th locked. The upper, protruding from the holder 15 end of the Insert 33 is provided with a tool engagement surface, in the embodiment with a hexagon 42 on which the insert gripped and can be rotated. The insert 33 is provided with a pointer 43, which is associated with a scale 44. The pointer 43 is opposite by 90 ° the blow opening 37 is rotated.

The holder 15 is further provided with a pneumatic holding device 50 for provided the end of the weft. This holding device 50 has one provided in the holder 15, extending transversely to the weft direction Channel, by a preferably made of wear-resistant material existing tube 45 is bordered. On this tube 45 is a blow opening 46 directed. In the embodiment, the insert 33 and the tube 45 is arranged in a common plane 51 which is transverse to the Shot direction runs. By means of a valve system 4 (Fig a Druckluftzuführkanal 47 of the holder compressed air led to the blow opening 46. The channel 47 extends through the receiving bore of the insert 33, which provided in this area with a cross-sectional reduction 48 is. The area of this cross-sectional reduction is from the sealing ring 41 and another sealing ring 49 sealed to the outside.

The edge insert 1 according to the invention operates as follows of Fig. 4 will be described. An inserted in a shed weft 68 is by means of the reed 11 between the guide surfaces 17th of the holder 15, so that the weft thread 68 is received in the holder 15 becomes. Due to the movement of the reed 11 of the Weft thread led to the insert 33. Then the weft is by means of the cutting device 7 facing away from the fabric 2 or 3 Side wall 67 of the holder 15 cut off. By means of the blow opening 46, compressed air is blown into the pipe 45, so that according to the dashed line of Fig. 4 shows the end of the weft thread 68 in the Pipe 46 is blown. Subsequently, compressed air is added to the blow opening 37 supplied to the end of the weft thread 68 in the subsequently formed Webfach blows. This blown in end will follow from the reed 11 together with the next weft thread to the Stop edge 12, 13 of the fabric 2, 3 struck.

In the embodiment of FIG. 8, the insert 33 is wear-resistant Cover 52 provided, which prevents a weft acting on the insert 33. In addition, in this embodiment a second insert 53 is provided, which is designed according to the insert 33 is and has a further blow opening 54 to the end of a Blowing weft into a shed. By appropriate circuits It is possible for a certain weft from the Blow opening 37 of the insert 33 used airflow to To blow the end of a weft into a shed. For someone else However, weft may be from the blow opening 54 of the insert 33 blown airflow can be used. Likewise it is possible the from both inserts 33, 53 blown air streams for inserting the Insert end of the weft thread, wherein both inserts 33, 53 be acted upon at the same time or offset to each other with compressed air.

In the embodiment of FIG. 9, the insert 33 is wear-resistant Cover 55 surrounded, which has a nozzle-like flow channel 56 forms to the emerging from the blow opening 37 of the insert 33 Direct airflow. The angular position of this cover 55 can be adjusted according to the angular position of the insert 33. at the embodiment of FIG. 9, the pneumatic support is offset to the center plane 51 of the holder 15, i. the channel 45 is opposite to the median plane in the direction of the tissue facing away Side wall 67 of the holder 15 offset. In this design is also the Do not mount holder 15 with a pipe serving as insert. The hole in the holder 15 is having a surface treatment for increasing provided the wear protection.

In the embodiment of Fig. 10, the insert 33 with two superimposed arranged blowing openings 37, 57 provided in the region of Guide slot are directed to the shed. In the illustrated Embodiment, the blow holes 37, 57 in the same direction directed. In a modified embodiment is provided in that the blow openings 37, 57 are arranged offset from one another in the circumferential direction are blowing out and in different directions. At a further modified embodiment are more than two blow holes 37, 57 provided, which are arranged side by side and / or one above the other are and blow in the same and / or different directions. As can be seen from Fig. 10, the boundary walls 58 of Guide slot in the region of the blow holes 37, 57 to the outside by means of a chamfer widened to prevent these limitations disturb the airflows.

As further shown in Fig. 10, the insert 33 forms the rotor for a controlled drive motor 59. The angular position of the insert 33rd and thus the drive motor 59 is controlled by means of the control unit 6 (FIG. 1). the air jet loom set. The drive motor 59 is, for example executed as a stepper motor. In the embodiment is further an encoder 60 is provided for determining the angular position the insert 33 is used and which is connected to the control unit 6.

In the embodiment of FIGS. 11 to 13, the edge insert 1 with further blowing openings 61 provided in the tissue facing Side wall 62 of the holder 15 open. These blow holes 61 blow Air currents in the direction of the warp threads to the shed for blowing make the end of a weft thread suitable. These blow holes 61 can also help a blown already to the shed End of the weft thread 68 continues to blow into the shed. The Blow openings 61 are each provided in an insert 63 which is rotatable is arranged in the holder 15. As can be seen from Fig. 13, serves as a blow opening 61 an oblique bore of the rotatable insert 63, see that by the rotation of the insert 63 not only the position of the Blow opening, but also the direction of the blown air stream can be changed. This setting may vary depending on the tissue to be woven, and in particular depending on the type of weft and / or the type of warp threads. So that the angular position of the insert 63 can be adjusted, this is with an external thread with a small pitch in a corresponding Screwed internal thread of the holder 15. The stimulus of the mission 63 is provided with a slot 64, so that the use of a Tool can be twisted. Between the external thread of the Insert 63 and the internal thread of the holder 15 may be a securing element be provided to the insert 63 in the set angular position to secure. As can be seen from Fig. 12, the holder 15 with Elements 69 provided, the compressed air inputs 65 have and with the valve 4 (Fig. 1) via supply lines 66 and a compressed air source for supplying compressed air to the blowing openings 61 are connected. at In a modified embodiment it is provided that the blowing openings 61 are connected to the compressed air supply channel 47, i. with the Compressed air supply for the pneumatic support. This can be done from the Blow holes 61 already compressed air are blown out before the blow holes 37 of the insert 33 supplied with compressed air and the end of the Weft thread is blown into the shed. Although in the illustrated Embodiment several inserts 63 with blow holes 61st are provided, in an alternative embodiment already one of these inserts 63 suffice.

As can be seen in particular from FIG. 11, the guide surfaces 17 of the holder 15 is not provided with a wear-resistant cover 18. In order to obtain a sufficient wear protection, it is preferable made a surface treatment.

The invention is suitable for weaving with abrasive weft threads. With the setting of the inserts 33, 53 or 63, the blowing direction of the Air flow or the air flows are adjusted so that the end of Weft thread is parallel to the stop edge 12 or 13 and in this Form is struck with the next weft.

The invention is not in its application to air jet looms limited. Such edge inserts are also in other weaving machines, such as rapier weaving machines, multiphase weaving machines such as weaving rotors, Gripper weft floats, water jet looms, projectile weaving machines and other weaving machines.

The holder 15 of the edge insert 1 according to the invention can additionally to the blowing openings 37, 57 in an insert 33 or the blowing openings 61 in an insert 63 also have additional blowing openings, which as Holes in the holder 15 may be performed.

The holder 15 may also be used instead of the pneumatic holding devices 50 have another holding device. The weft threads can, for example by so-called inguinal threads or by a mechanical Weft clamp between the insert 33 and the cutting device 7 are kept.

It is also possible, instead of a blow opening 46, that the weft 68 einblas in the tube 45 to provide other options, in particular to connect a suction line to the tube 45.

The edge insert 1 according to the invention offers the advantage that it can be used by means of some adjustments, in particular by adding one or more several valves 4 and a control unit 6, easily existing Weaving machines can be installed.

The invention is not limited to the illustrated and described embodiments limited. In the context of the invention, these embodiments be easily modified.

Claims (10)

1. Tuck-in selvage for a weaving machine to insert the end of a weft thread into a shed with a holder (15) which is provided with means (32) to receive the end of the weft thread inserted in a shed, and means to blow the end into a subsequently formed shed, whereby the means to blow in are connectable to a compressed air source (5) via valves (4) which are controllable via a control unit (6), characterized in that the holder (15) is provided with at least one rotatably mounted insert (33, 53, 63) connectable to the compressed air source (5), and at least one compressed air opening (37, 54, 57, 61) whose position is adjustable.
2. Tuck-in selvage according to claim 1, characterized in that the insert (33, 53) has an axial channel (35) connectable to a compressed air source (5), and at least one essentially radial blowing opening (37, 54, 57).
3. Tuck-in selvage according to claim 1 or 2, characterized in that the holder (15) is provided with a guide slot for weft threads, and that the insert(s) (33, 53) are placed prior to the end of the guide slot.
4. Tuck-in selvage according to one of claims 1 to 3, characterized in that at least some of the components (17, 45, 33) which come in contact with the weft thread are provided with wear-resistant covers (18, 52, 55).
5. Tuck-in selvage according to one of claims 1 to 4, characterized in that the holder (15) is provided with a pneumatic holding device (50) for the end of a weft thread.
6. Tuck-in selvage according to one of claims 1 to 5, characterized in that a cutting device (7) for weft threads is on the side (67) of the holder (15) facing away from the fabric.
7. Tuck-in selvage according to claim 6, characterized in that the cutting device (7) is placed at an adjustable distance relative to the holder (15).
8. Tuck-in selvage according to one of claims 1 to 7, characterized in that the holder (15) is provided with at least one blowing opening (61) facing the fabric in the weaving direction before the insert (33), and the opening is near a side wall (62) facing the fabric.
9. Tuck-in selvage according to claim 8, characterized in that at least one blowing opening (61) near the side wall (62) of the holder (15) is in an insert (63) which can rotated to adjust the position of the blowing opening and/or the blowing direction.
10. Tuck-in selvage according to one of claims 1 to 9, characterized in that at least one insert (33) which is provided with at least one blowing opening (37, 57) for inserting the end of the weft thread in a shed is assigned a drive (59) controlled via a control unit (6).

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