CN1854366B

CN1854366B - Yarn actuating device for textile mechanism

Info

Publication number: CN1854366B
Application number: CN 200610074768
Authority: CN
Inventors: C·罗萨里奥; Z·彼得罗
Original assignee: LGL Electronics SpA
Current assignee: LGL Electronics SpA
Priority date: 2005-04-27
Filing date: 2006-04-03
Publication date: 2011-03-30
Anticipated expiration: 2026-04-03
Also published as: ITTO20050279A1; EP1717181B1; EP1717181A1; CN1854366A; DE602006000210T2; DE602006000210D1

Abstract

The device comprises a pair of linear actuators (26, 28) provided with respective driving rods (26a, 28a) parallel to the axis of the drum of the weft feeder. A hollow braking member (32) having a circular profile is anchored to the driving rods (26a, 28a) and is axially biased with its inner surface against the outer surface of the drum (12). The driving rods (26a, 28a) and the hollow braking member (32) are mutually connected by magnetic interconnection means (38, 44) acting in a direction parallel to the axis of the drum.

Description

The yarn arresting gear that is used for spinning machine weft feeding device

Technical field

The present invention relates to a kind of yarn arresting gear that is used for spinning machine weft feeding device.

Background technology

As is known, the weft feeder that is used for textile machine comprises a fixing drum, this fixedly on the drum a motor-driven turning arm be wound with the loopy yarn circle, form the weft yarn deposit.In case the loom requirement, with the yarn circle from the drum unwinding and the tension force by the control yarn so that the brake apparatus that tension force substantially constant ground is imported feed to loom.

In the weft feeder of the above type that the person skilled in the art will be appreciated that, brake apparatus generally includes hollow member in the form of a truncated cone, supported this component coaxial, make its bigger end face to drum, and setovered, make the free end of interior surface thereof against drum, the free end of drum has the edge that is the oblique angle, and the yarn circle is from this edge unwinding.Like this, the yarn of unwinding is advanced between drum and Frusto-conical member, applies required braking on yarn.

In EP-A-1059375, regulate the pressure that is applied on the drum with bullet as can be known, and subsequently by brake apparatus is connected to come the braking action of regulating action on the yarn of unwinding with one or more linear actuators work, to the electric current that these actuator supplies are regulated according to the variation of yarn tension, this tension force is measured by sensor.

Yet when brake apparatus was connected in a plurality of actuator around the axis equidistant placement of frustoconical member, these actuators can be because inevitable tolerance and can not accurately aiming at, and perhaps their action can not be accurately synchronous.These situations usually cause stress and reaction force in the position that drive rod is connected with brake apparatus, thus this accuracy and homogeneity that can influence the work of actuator and influence braking action.

Summary of the invention

Therefore, a main purpose of the present invention provides the brake apparatus of the above type that is provided with a plurality of linear actuators of regulating the brake apparatus action, this device is improved, thereby avoid actuator misalignment and nonsynchronous influence, thereby very accurate and uniform braking maneuver is provided.

Tangible more above purpose and other advantage of will becoming below can reach by the yarn arresting gear with the described feature of claim 1, and other claim has been set forth other advantage of the present invention and accidental quality simultaneously.

Description of drawings

To describe the present invention in conjunction with some preferred non-exclusive embodiment now, these embodiment illustrate with the example of indefiniteness in the accompanying drawings, in the accompanying drawings:

Fig. 1 is the side view that is provided with according to the weft feeder of yarn arresting gear of the present invention;

Fig. 2 is the stereogram of yarn arresting gear shown in Figure 1;

Fig. 3 is the side cross-sectional view of yarn arresting gear shown in Figure 2;

Fig. 4 shows the details of Fig. 3 with the ratio of amplifying;

Fig. 5 is and the similar view of Fig. 3, shows another embodiment according to yarn arresting gear of the present invention.

The specific embodiment

At first referring to Fig. 1,2, the weft feeder 10 that is used for textile machine comprises fixedly drum 12, and on this drum, the turning arm 14 coiling loopy yarn circles that driven by motor 16 form weft yarn deposit RT.The transmission edge of drum 12 is the oblique angle at the 12a place.When the loom (not shown) requires, yarn F unwinding from the drum 12, and be fed to loom.It is outstanding and at its free end supporting brake apparatus 18 that fixedly drum 17 is parallel to the axis of drum 12, and the tension force of this brake apparatus control yarn makes it keep substantially constant.

Brake apparatus 18 comprises the support 20 that is supported on the slipper 22, and this slipper can be along fixedly drum 17 slips under the control of the worm mechanism (not shown) that can be controlled by knob 24.The a pair of linear actuators 26,28 of support 20 supportings becomes its drive rod 26a, 28a separately respectively at the axis that is parallel to drum along two relative positions of diameter these two actuator arrangement.Be supported on the free end of drive rod with the ring-shaped bearing piece 30 of drum coaxial line.Frusto-conical hollow member 32 by the elastic device coaxial line be supported on the center of ring-shaped bearing piece 30, the end 32a that this hollow member is bigger faces drum, and its inner surface is subjected to bias voltage and against the edge 12a of bevel, this elastic device comprises the spoke formula assembly of all springs 34, one end of each spring is fixed on the ring-shaped bearing piece, and the other end is fixed in the ring 36 of a less end 32b who is connected to frustoconical member.Frustoconical member can be made by for example metallic plate or the fabric or the laminated plastic that are filled with polymer resin.

In a known method, the yarn F of unwinding advances between the inclined side of drum and frustoconical member 32 from the drum 12, and this can apply required braking action on yarn.Can regulate by knob 24 by the quiet contact pressure that frustoconical member is applied on the drum.

According to the present invention, referring to Fig. 3 and 4, for ring-shaped bearing piece 30 is fixed in drive rod 26a, 28a, each drive rod all has the cylindrical metal part 38 of the link that is connected in this bar, and this cylindrical metal part is contained in matched in clearance and is formed at ring-shaped bearing piece 30 dorsad in each blind hole or chamber 40 among the surperficial 30a of drum.The surperficial 30b that the bearing 42 of aligning chamber 40 is formed in the face of drum goes up and is opened with this span by the thin-walled 30c of the bottom that forms blind hole 40 and bearing 42.Each bearing 42 has the magnetic insert 44 that is contained in wherein, and this insert and each are connected in metalwork 38 magnetic attraction of drive rod end.

Known to the person skilled in the art, fixed system of the present invention has been arranged, ring-shaped bearing piece 30 moves with drive rod 28a, 28b with being integral, and the matched in clearance between metalwork 38 and the chamber separately thereof allows ring-shaped bearing piece 30 at right angles to move with respect to the axis of actuator, thereby any misalignment of compensation actuator or asynchronous and can not cause stress and reaction force, on the contrary, can cause stress and reaction force for being rigidly connected.

Another important advantage of the present invention is, above-mentioned magnetic class fixed system has been arranged, can be easily and dismantle frustoconical member apace, and for example when braking element needs because of wearing and tearing to change.

Fig. 5 shows an alternative embodiment of the invention, wherein drive rod by with being connected described in first embodiment similar magnetic connect be directly connected in frustoconical member 32 than small end all-in-one-piece installing ring 136.Specifically, metalwork 138 is connected in the link of drive rod 28a, 28b and is contained in matched in clearance and is formed at ring 136 dorsad in each chamber 140 in the surface of drum.The bearing 142 of mating holes 40 be formed on ring 136 in the face of on the surface of drum and by forms chamber 40 and with it the bottom of the bearing 142 of aligning thin-walled 130c and open with this span.Each bearing 142 has the magnetic insert 144 that is contained in wherein, this insert and corresponding metalwork 138 magnetic attraction that are connected in the drive rod end.

Here described preferred embodiments more of the present invention, still, the person skilled in the art also can carry out many variations within design scope of the present invention.Particularly, the thickness of the thin-walled that can separate with the end of drive rod to the material of magnetic insert and with insert is selected, make suction both can make frustoconical member be motion integratedly, allow metalwork to slide for the above object again in the bottom of chamber 140 with drive rod.In addition, but the member of available other magnetic attraction comes the alternative metals part, such as have be installed in ring-shaped bearing piece 30 (first embodiment) or installing ring 136 (second embodiment) on the magnetic parts of the opposite magnetic pole of insert, so that stronger attraction to be provided.What in addition, brake apparatus also can be provided with greater number arranges and is connected in method same as described above separately the actuator of ring-shaped bearing piece or ring around the axis equi-spaced apart of frustoconical member.In addition, though be Frusto-conical and have continuous surface at the brake apparatus described in the above embodiment, certainly, it also can use the brake apparatus of other type to constitute the part of design of the present invention, these devices have circular contour and are subjected to bias voltage and lean against on the outer surface of drum, such as the frustoconical member of making by a plurality of blades, ring of bristle radially etc. is arranged, these all are known to the person skilled in the art.

Claims

1. yarn arresting gear that is used to be provided with the weft feeder of a storage yarn drum (12), yarn (F) from this storage yarn drum unwinding to feed to a textile machine, this yarn arresting gear comprises: at least one pair of linear actuators (26,28), actuator have the drive rod (26a, 28a) of the axis that is parallel to drum separately; An and hollow braking element (32), this braking element has circular contour and is fixed in drive rod (26a, 28a) and axially is subjected to bias voltage, its inner surface is against an outer surface of drum (12), it is characterized in that described drive rod (26a, 28a) and described braking element (32) are connected to each other by the magnetic interconnection device (38,44) of directive effect along the axis that is parallel to drum.

2. device as claimed in claim 1, it is characterized in that, described braking element is made of a conical butt hollow member (32), this member be arranged to it than large end face to drum (12) and be subjected to bias voltage, thereby its inner surface is against the delivery edge (12a) of drum (12).

3. device as claimed in claim 1 or 2, it is characterized in that, described magnetic interconnection device comprises: each described actuator (26,28) has a magnetic parts (44), and this magnetic parts engages with a one in described braking element (32) and the drive rod (26a, 28a) and relies on magnetic to attract each other with another the part that can attract accordingly (38) that one is engaged in described braking element and the drive rod.

4. device as claimed in claim 3 is characterized in that, the described part that attracts (38) is connected in the end of described drive rod (26a, 28a), and described magnetic parts (44) engages with described braking element (32) one.

5. device as claimed in claim 4, it is characterized in that, described braking element (32) is supported on the supporting member (30) of being made by nonmagnetic substance, and the described part that attracts (38) is housed inside a first surface (30a) that is formed on the rectangular described supporting member of the axis of described braking element (30) with a matched in clearance and goes up in the respective aperture (40) that forms.

6. device as claimed in claim 5 is characterized in that, described magnetic parts (44) and supporting member (30), engage back to a second surface (30b) in first surface.

7. device as claimed in claim 6, it is characterized in that, described magnetic parts (44) is contained in the bearing (42), and this bearing is formed on the described second surface (30b) of supporting member (30), and this bearing (42) is aimed at hole (40) and opened by a thin-walled (38) and this span.

8. device as claimed in claim 3 is characterized in that, the described part that attracts is made up of a metal parts (38).

9. as any described device in the claim 4 to 7, it is characterized in that the described part that attracts (38) is made up of a magnetic parts, this magnetic parts has the opposite magnetic pole of magnetic parts that is engaged in described braking element (32) with one.

10. device as claimed in claim 5 is characterized in that, described supporting member is made up of a ring-shaped bearing piece (30), and described braking element (32) is supported on the central authorities of described ring-shaped bearing piece (30) by elastic device (34).

11. device as claimed in claim 5 is characterized in that, described supporting member (136) is integral with braking element (32).