WO2006099859A1

WO2006099859A1 - Bobbin carrier for braided material with reduced diameter

Info

Publication number: WO2006099859A1
Application number: PCT/DE2006/000525
Authority: WO
Inventors: Jürgen LACHE; Steffen Adams
Original assignee: Wardwell Europe Gmbh
Priority date: 2005-03-23
Filing date: 2006-03-22
Publication date: 2006-09-28

Abstract

The invention relates to a bobbin carrier for braided material with reduced diameter, comprising a bobbin for taking up the braided material, mounted to rotate between a bayonet bearing mounted on arms and a brake bearing of a brake with a brake lever, a rotating piece, mounted to pivot against a spring force about a pivot point formed by a pin held by a carrier, whereby guide rollers for thread guidance are arranged to rotate on the carrier. The aim of the invention is to provide a bobbin carrier by means of which it is possible to withdraw from the bobbin, thin and fragile braided material with essentially constant withdrawal force with concomitant smooth sensitive application of the braking force whilst excluding brake force variations due to the effects of oil. Said aim is achieved, whereby the pivot point (9) of the rotating piece (20) is arranged at the centre of mass (MP) of the combined body of the rotating piece (20) with extension arms (22,23) and guide rollers (30;31) and only the guide rollers are provided for thread guidance to the twisting point (FP) and for tensile force regulation. A torsion spring (39), connected by means of a tensioning lever (40) and engaging with a connector bar (41) to the extension arm (23) of the rotating piece (20) is tensioned against the pivot point (DP) of the brake lever (26) and a pressure spring (44), adjustable by means of a tensioning screw (45), connected to the brake cable (35) and held by a retainer (46) on the brake lever (26), are provided for the setting of a reproducible braking force and the extension arm (22) of the rotating piece (20) is provided with a stop piece (43) mounted to rotate on the brake lever (26) in which an inset body (25), comprising an adjuster piece (42), is arranged with a sliding fit for delay of the braking or lifting process.

Description

Coil carrier for small diameter braid

The invention relates to bobbin for Wickchtgut with a small diameter such as thin metal wires, fine or finest textile or plastic threads o. The like. with a Wickgutgut receiving coil which is rotatably supported between a bayonet bearing and brake bearing of a brake with brake lever, a rotary member which is pivotally mounted by a, held by a support member pin pivot point against spring force, wherein guide rollers for thread guide on Supporting part are rotatably arranged,

From DE 40 34 893 Al a generic coil carrier for Schnellflechtmaschinen is known with a brake for the coil and the winding diameter of the coil scanning probe.

The bobbin has a thread-guiding control plate with a cam surface at one end and a cam sensor, which controls the brake for the coil, taking into account the deflection of the control plate, which in turn is connected with its opposite end via an adjustable spring member with the sensing the diameter of the winding material Tastarm.

This known arrangement does not act as a controller, but as a controller, because the change in the braking force in response to the theoretical vote of the spring characteristic for the change in diameter of the winding and no direct feedback to the traction on the braiding occurs. The control loop is interrupted in this known solution by scanning the cam surface by means of a cam sensor, whereby the differential torque acting on the brake of spring force and tensile force is distorted. In addition, since the cam surface located on the control plate is located very close to the pivot point of the control plate, the leverage is far too low to ensure sufficient for thin woven good sensitivity and ease.

Furthermore, US Pat. No. 3,425,315 A describes a coil carrier which has a latch mechanism which controllably fixes the coil and releases it to rotate, so that a step control takes place, which causes power surges.

From GB 22 13 844 A, a bobbin is known in which a carrier has a base part on which a coil is rotatably mounted by means of a vertically arranged, axial support. The carrier has a series of further supports arranged radially around the axial support, a series of guide rollers, a mechanism for tensioning a moving strand, and a backrest. and moving rod which protrudes into the base part and responds to strand tension. The spool control mechanism includes a finger cam connected to the reciprocating rod, a free cam movable by the finger cam, a ratchet wheel rotatable about the base of the axial support, a first jack cam prevents rotation of the ratchet wheel in the direction of travel, and a second pawl cam, which prevents the rotation of the ratchet wheel in a counterclockwise direction.

This known coil control means of a locking gear has the disadvantage that the tension can not be controlled smoothly.

Another known coil carrier (see brochure of the company Wardwell Europe GmbH, Schnellflechtmaschinen types DF12A, DFlβA, DF24A from August 2001) has a controllable block brake, which is provided via a storage arm and an eccentric cam depending on the tensile force of the braiding material.

The disadvantage here is that the block brake is prone to oil pollution and due to the different coefficients of friction between dry friction and oiled friction greater traction differentials allows and a larger number of management and control bodies are involved in the process, which increase the total tensile forces.

All these known solutions also have the common disadvantage that, in particular in the case of very fine woven material, which may well have a diameter of a few μm, no uniform pull-off force is achieved during the entire braiding process. However, this uniformity of traction is of great importance because it is essential for compliance with the Braided strand diameter, the precision of the braid structure and the avoidance of wire or thread breaks plays a crucial role. In addition, when processing very thin wovens, the permissible tensile forces also have to be kept very small in order to counteract quality losses caused by braided material cracks. Moreover, the known regulating and guiding processes are far too cumbersome to achieve a high level of sensitivity of the regulating and guiding processes for the crack-sensitive wovens.

In this prior art, the invention has for its object to provide a bobbin of the type mentioned, with which it is possible, thin and crack-sensitive braiding with substantially uniform

Withdrawal force with simultaneous ease of movement and

To subtract the sensitivity of the braking force and the absence of brake force differences when the oil is applied to the brake from the spool.

This object is achieved by a coil carrier according to the preamble with the characterizing features of claim 1.

Advantageous embodiments of the bobbin are the dependent claims.

By arranged on the rotary or control part of the bobbin boom according to the invention relatively large length arise large lever paths, which make it possible to store Flechtgut when necessary and already implement small changes in force in the withdrawal force of the braiding in a strong moment that a sensitive and jerk-free response of the brake allows. Even small actuating forces thus trigger a high braking effect and Bremsliftungseffekt. Since there is a direct feedback between the pull-off force and the braking force, the braiding material can be pulled off the coil in a uniform manner, making it possible to also process braids with a small diameter without cracking. The coil carrier according to the invention is characterized in that the pivot point of the rotary member coincides with the center of mass of the turntable with its arms and guide rollers, so that centrifugal forces can be excluded on the torques. It is particularly advantageous that the rotary part has an inclined position, so that the plane of rotation occupies a position that coincides with the alignment of the coil withdrawal and braiding point. The emergence of lateral forces on the Flechtgut is thereby avoided. The bobbin according to the invention requires compared to the prior art only two guide rollers, whereby the deformation of the braided material can be reduced to a minimum. Due to the approximately parallel arrangement of the guide rollers of the rotary member to the coil axis is formed in cooperation with the associated arms a large leverage for rotating the traction-regulating rotary member. The required tensile forces can be kept small in Flechtgut. Another advantage is that the control and braking elements are particularly smooth and sensitive by the use of low-mass components and a brake cable. The application of a cable brake for brake regulation for the coil with the braided material is further associated with the advantage that with small rope forces great braking effects be achieved. At the same time, the use of a rope brake leads to a substantial insensitivity to the generally occurring oil effect.

The invention will be explained in more detail below using an exemplary embodiment.

The accompanying drawing shows in

1 shows a coil carrier according to the generic state of the art,

2 is a plan view of the bobbin according to the invention,

Fig. 3 is a side view of the invention

Spool carrier and

Fig. 4 shows a variant of the bobbin invention having an approximately square basic shape

Turned part.

In Fig. 1, the bobbin of the gatuungsbildenden prior art according to DE 40 34 893 Al is shown. The bobbin consists of a support member 1, which has two U-shaped bent legs 2. One leg takes a bayonet 3 and the other leg a brake bearing 4. Between both the coil 5 is rotatably held. The Wicker 6, for example, a thin metal wire or a plastic thread runs from the spool 5 via a support roller 7 on a control plate 8. The control plate 8 is spring-loaded centrally on a pin or about a pivot point 9 pivotable and carries on each side of its pivot point depending on a thread guide roller 10. At one end of the control plate 8 is a cam surface

11 formed. On this cam surface 11 runs as a cam sensor, the roller 12 of an arm 13 which influences the brake 4 via an axle 14 and an adjustable linkage 15. On the axis 16, an anchor point 17 is attached to a tension spring 18, the other end is attached to an adjustable anchor point 19. By turning the anchor point both the lever arm to the pivot point 9 of the control plate 8 can be extended, and the restoring force of the tension spring 18 can be changed by increasing its bias.

By the dependence of the spring characteristic of the tension spring 18 with the control function of the probe and the rolling friction of the role

12 on the cam surface, the force acting on the brake 4 is corrupted. In particular, oil effect, which can not be excluded in braiding processes, lead due to different coefficients of friction to larger force differences, which affect the processing of thin braid.

In Fig. 2, the bobbin according to the invention is shown in plan view, which corresponds in the basic structure of the bobbin with elimination of the support roller, catcher roller with thread catcher and the Tastrαechanismus of FIG. The control plate 8 is formed as a rotary member 20 of a circular flat body 21 having a first boom 22 and a second boom 23. The arms 22 and 23 are in the plane of rotation DE of the main body 21 and protrude with respect to the pivot point. 9 offset from each other by the periphery of the base body 21 with respect to the pivot point 9 rocker way away. The axis A _{22 of} the first arm 22 extends by a small amount offset below the pivot point 9 of the rotary member 20, the axis A ₂ 3 of the second arm 23 well above the pivot point 9 of the rotary member 20. In the embodiment of FIG. 2, the first Boom 22 has a length L _22Λ which is compared to the length L _{23 of} the second boom 23 by l, 5 times greater, so that the center of mass MP from the rotary member 20, the arms 22 and 23 and the guide rollers 30 and 31 with the pivot point. 9 coincides and an extremely high sensitivity for the response of the brake is already achieved with slight changes in the tensile force of the wicker.

Furthermore, the width B2 _{3 of} the cantilever 22 is about twice as small compared to the width B _{23 of} the cantilever 23.

The brake 4 facing the end of the boom 22 is provided with an opening 24 into which a Einhängeglied 25 is articulated, which is also hingedly connected to the brake lever 26. About half the length of the boom 23 engages a connecting rod 41, which is fixed via an adjusting device 27 on the support member 1. The adjusting device 27 is formed from a setting wheel 28 and a pawl 29, by means of which a torsion spring 39 and a clamping lever 40 can be adjusted reproducibly. The circular base body 21 of the rotary member carries two adjacent guide rollers 30 and 31, which are positioned on a common axis B, which runs in alignment with the pivot point 9. As shown in Fig. 3, the Wicker 6 leaves the bobbin after passing through the guide rollers 30 and 31. The guide rollers 30 and 31 allow to compensate for longitudinal differences by storing accordingly. The plane of rotation DE of the rotary member 20 is tilted relative to the support member 1 at an angle α of 15 °, wherein the plane of rotation DE runs parallel in the drawing-off direction of the wicking material 6. This ensures that the plane of rotation DE can be made to coincide with the escape of the extraction point AP of the braiding material from the spool 6 and the braiding point FP. On the weave acting lateral forces are thus avoided. Close to the pivot point DP of the brake lever 26, the hinged end of the brake cable 35 is mounted. The brake cable 35 wraps around the brake disk 36 and ends in a threaded terminal 37. The threaded terminal 37 forms with an abutment 38 an adjustable fixed point. The brake lever 26 is connected in the upper third of the pivotable end with a compression spring 44, which allows the setting of a reproducible braking force via a bearing 46 in the holder clamping screw 45.

At the upper end of the brake lever 26, a stopper piece 43 is rotatably mounted, in which the suspension member 25 is slidably guided, wherein the suspension member 25 carries an adjustment piece 42, the brake lever 26 time-delayed over the stopper piece 43 and the brake cable 35 during pivoting of the boom 22 lifts off the brake disc 36. In Fig. 4, a further variant of the rotary member 20 is shown, which is formed of an approximately square base body 32, to which the first boom 22 and the second arm 23 diametrically opposite to the virtual IO

Corners E _{v of} the main body 32 are integrally formed. Both arms 22 and 23 are symmetrical to the pivot point 9 of the rotating part. Along the axes A ₂₂ and A ₂₃ insertion holes 33 are introduced into the boom 22 and 23, in which the suspension member 25 and the tension spring 18 can be suspended adjustable, so that the effective Hebelarmlänge L22 of the boom 22 and L ₂ 3 of the boom 23rd can be varied.

The approximately square base body 32 carries at the remaining corners E with bulges 34 diametrically opposite, symmetrical to the pivot point 9, the rotatable guide rollers 30 and 31, wherein the axis of rotation of the guide roller 30 slightly above the axis A23 of the boom 23 and the axis of rotation of the guide roller 31 something below the axis A _{22 of} the boom 22 is located. In this embodiment, the boom 22 and 23 are the same length. With this arrangement, the guide rollers 30 and 31, a slightly larger storage effect is achieved to compensate for the differences in length. ^!

List of used reference numbers

Support part 1

Bent legs 2

Bayonet bearings 3

Brake bearing 4

Coil 5

Wicker 6

Support rollers 7

Control or turntable 8

Pivot point 9

Thread guide rollers 10

Cam surface 11

Roll 12

Arm for 12 13

Axis of 13 14

Linkage 15

Axis 16

Anchor point 17

Tension spring 18

Anchor point 19

Turned part 20

Flat circular base 21

First boom 22

Second boom 23

Openings in boom 24

Suspension link 25

Brake lever 26

Adjustment device 27

Handwheel 28

Pawl 29

Guide roller 30

Guide roller 31 Square basic body 32

Hook-in openings 33

Bulges 34

Brake cable 35

Burner disk 36

Threaded terminal 37

Counter bearing 38

Torsion spring 39

Tension lever 40

Connecting rod 41

Adjustment piece 42

Stop piece 43

Compression spring 44

Clamping screw 45

Holder 46

Symmetry axis AS

Deduction point at 6 AP

Axis of the boom 22 A ₂₂

Axis of the boom 23 A ₂₃

Common axis of the guide rollers 30 and 31 B

Length of boom 22 L22

Length of boom 23 L23

Beam width 22 B22

Width of the boom 23 B ₂₃

Turned corner E

Virtual turntable corners Ev

Flechtpunkt FP

Plane of rotation DE

Pivot brake lever DP

Mass center of 20, 22, 23, 30, 31 MP

Coil center of 5 SM

Angle of rotation of the plane of rotation α

Claims

claims

1. Spool carrier for small diameter plaited material such as thin metal wires, fine or very fine textile or plastic threads or the like. , comprising a bobbin receiving the braid and being rotatably supported between a bayonet bearing received by legs and a brake bearing with a brake lever (26), a rotary member (20) formed by a pivot point (9) formed by a journal held by a support member (1) ) Is mounted pivotally against spring force, wherein guide rollers (30,31) are arranged for thread guide on the support member, as you rchgekennzeichnet that the pivot point (9) of the rotary member (20) in the center of gravity (MP) of a rotary part (20) with arms (22,23) and guide rollers (30; 31) composite body is arranged, and that for the yarn guide to the braiding (FP) and traction control only guide rollers are provided, and that one opposite to the pivot point (DP) of the brake lever (26) on the boom (23) of the rotary member (20) via a connecting rod (41) engaging and by a clamping lever (40) connected, tensioned torsion spring (39) and connected to the brake cable (35) by a Holder (46) on the brake lever (26) fixed, with a clamping screw (45) adjustable compression spring (44) is provided for setting a reproducible braking force, and in that the boom (22) of the rotary member (20) rotatably mounted on the brake lever (26) Stopping piece (43) is assigned, in which a, an adjusting piece (42) exhibiting Einhängeglied ^' (25) is slidably guided for the time delay of the braking or lifting operation.

2. Coil carrier according to claim 1, characterized in that the pivot point (9) of the rotary member (20) is located on a to the coil center (SM) of the coil (5) arranged symmetry axis (AS).

3. bobbin according to claim 1 and 2, characterized in that the rotary member (20) with a, of the periphery of its base body (21; 32) projecting first and second arm (22; 23) is provided, whose longitudinal axes (A ₂ 2; A ₂₃ ) each lie in a common or mutually parallel rotational axis (DE).

4. bobbin according to claim 1 to 3, dadurchgekenzeichnet that the plane of rotation (DE) under inclination to the support member (1) with an angle (oc), parallel to the alignment of Flechtpunkt (FP) and Abzugspunkt (AP) of the coil (6) is, wherein the axes (A22, A23) of the two arms with respect to the pivot point (9) are arranged offset to each other lever in this plane, and that the first arm (22) at its end remote from the rotary member (20) by the Einhängeglied ( 25) with the brake lever (26) of the brake cable (35) is pivotally and adjustably connected, and that the second arm (23) at its end remote from the rotary member (20) against one, on the support member (1) via a spring force of Torsion spring (39) reproducibly adjusting adjusting device (27) is held.

5. Coil carrier according to claim 4, characterized in that the angle (α) of the inclination of the plane of rotation (DE) is 5 to 20 °, preferably 15 °.

6. Coil carrier according to claim 1 to 5, characterized in that the rotary member (20) from a flat base body (21, -32) is formed, with which the lever-like away from each other leading arms (22; 23) are integrally connected.

7. Coil carrier according to claim 6, characterized in that the basic body (21, -32) has a circular or multiply rounded basic shape.

8. Coil carrier according to claim 3, characterized in that the lengths (L ₂₂ , "L ₂₃ ) and the widths (B _22r " B ₂ 3) of the two arms (22; 23) are different or equal.

9. Coil carrier according to claim 3 and 8, characterized in that the

Ratio of the lengths (L ₂₂ / L ₂₃ ) of the two arms (22, 23) to each other is between 0.72 and 1.0.

10. Coil carrier according to claim 3 and 8, characterized in that the ratio of the widths (B ₂₂ ; B ₂₃ ) of the two arms (22; 23) to each other between 0.5 and 1, 0 is.

11. Coil carrier according to claim 3 to 10, characterized in that the axis (A ₂₂ ) of the first

Jib (22) below the pivot point (9) of the circular base body (21).

12. bobbin according to claim 3 to 10, characterized in that the axis (A ₂₃ ) of the second arm (23) above the pivot point (9) of the circular base body (21).

13. Coil carrier according to claim 1 and 2, characterized in that the rotary part (20) is formed exclusively by the arms (22, 23).

14. Coil carrier according to claim 1 to 13, characterized in that the first arm (22) along its axis (A ₂₂ ) adjacent openings (33) for adjustably hooking the member (25).

15. Coil carrier according to claim 1 to 13, characterized in that the second arm (23) along its axis (A ₂₃ ) adjacent openings (33) for adjustably hooking the connecting rod (41).

16. Coil carrier according to claim 1 to 13, d a d u r c h e c e n e c e in that the axes of rotation of the guide rollers (30, -31) are arranged side by side on a common axis (B) in alignment with the pivot point (9) symmetrically on the circular base body (21).

17. Coil carrier according to claim 1 to 13, d a d u r c h e c e n e z e c h e s that the axes of rotation of the

Guide rollers (30, -31) lie diametrically opposite the bulges (34) of the square base body (32) on a common axis (B) passing through the Pivot point (9) of the square base body (32), wherein the axis (A2 ₂ ) of the first arm (22) by a small amount above the axis of rotation of the guide roller (31) and the axis (A ₂₃ ) of the second arm (23) is arranged by a small amount below the axis of rotation of the guide roller (30).

18. Coil carrier according to claim 1 to 17, d a d e r c h e c e n e c e s in that the

Setting device (27) consists of a setting wheel (28), a pawl (29) and a clamping lever (40) for adjusting the spring tension is formed.