EP1190974B1 - Winding machine in particular for sensitive material - Google Patents

Abstract

The bobbin winder (1), especially for delicate yarns (8), has feed rollers (11) and a powered bobbin spindle (4). A monitor (14) registers the yarn tension, and generates proportional signals to the control for the bobbin spindle and the reciprocating yarn guide (10). The yarn tension monitor has a single roller (16) on a cantilever arm (15) with a restricted movement. The monitor roller deflects the yarn path from the feed to the yarn guide, without additional deflection rollers. The bobbin winder, for delicate yarns, has a cantilever to support the monitor roller. The monitor has at least one sensor to register the bending movements of the cantilever, and generate a signal proportional to the detected movements. The cantilever arm can be a weighing beam, to register the force of the yarn on the roller, and generate a proportional signal. The cantilever beam is fitted with expansion measurement strips at its nominal bending zone. The bending beam can be within a housing tube, with adjustable limit stops to set the movement range. The winder has a number of bobbin winding heads, each with a drive spindle and a reciprocating yarn guide. Each bobbin winding head has its own yarn tension monitor, with a single roller, within a separate machine unit (13).

Description

The invention relates to a winding machine for a feed device supplied, in particular sensitive Spulgut, with a driven winding spindle, a traversing device and means for detecting one of the voltages in Spulgut proportional signal, a sensor, a movable cantilever and a mounted at the free end has only role over which the Spulgut between the Feeding device and the traversing device under Avoiding further pulleys is guided directly. The Feeding device is often not part of the winder, but is in the end of one of the winder upstream manufacturing plant, z. B. a spin line, a finishing plant o. The like. Realized. But it can too a separate inlet with guide rollers on the winder be provided. Among sensitive wadding, e.g. thread- or band-shaped material understood, in particular Spulgut from Carbon fibers or glass fibers that are sensitive to bending and / or friction is. In particular, multiple changes of direction of the dough, especially under large angles of wrap and under small radius can cause unacceptable damage to the Lead good material. For known Tänzerarmeinrichtungen are Such Bending bends of Spulgutes typical.

A winding machine of the type described above is from the US 4,546,656. At the winder is via a feeder fed Spulgut, with one over a Motor driven winding spindle and a traversing device in Form of a spiral wound up. Between an applicator and The spiral is a device for determining one of the voltage in Spulgut proportional signal and to display this Voltage provided a movable cantilever in the form of a Bending beam and at least two arranged on the bending beam Pointer and at least two associated and mounted on the housing side Has sensors. The two pairs each from a pointer and a sensor are placed in 90 ° arrangement to each other. At the free end of the movable cantilever is a single role stored over which the Spulgut between the feeder and the traversing device while avoiding further Guide rollers is guided directly. Outside the case is a Evaluation electronics for the generation and processing of Provided signals that are supplied to the display. The device for determining the voltage in the product to be spooled Signal is elaborately designed and requires an the measurement adapted in the two levels appropriate Evaluation. In addition, the drive requires the winding spindle one independent of the determination of the voltage signals additional control.

From DE 41 10 429 A1 is a Zugkraftmesseinrichtung as singular plant part known in which the principle of the bending beam or the torsion bar with one at the free end attached role is used. Such Zugkraftmesseinrichtungen are usually between two consecutive Guide rollers, which are rigidly mounted on the machine frame, arranged, that is, at the point where usually the dancer arm provided is. This can be a harmful alternating bending, especially for sensitive Spulgut, not avoid.

From DE 37 23 593 C1 another winding machine is known. The winding machine has a winding spindle, which has a variable drive is driven. On the winding spindle is a sleeve attached, which receives the winding material to be wound up. The Spulgut is using a traversing device or a other Fadenleitwerkes distributed distributed on the sleeve. In front the traversing device is a Tänzerarmeinrichtung, the one of the voltage (tensile force) in Spulgut proportional signal determined and used to control the drive of the winding spindle. The known Tänzerarmanordnung has two stationary arranged pulleys and between these a movable Dancer arm up. The Spulgut wrapped around these three roles by type a pulley arrangement. A change in the thread tension causes a movement of the dancer arm, the size and direction is detected. This signal is used as a manipulated variable in one Used loop, the drive motor influenced so is that the tension in the Spulgut again their original Takes value. The tension in the Spulgut is ansich by the Dancer arm self generated. For this purpose, the dancer arm is over affects a spring force and / or a weight force. The on On the other hand, this tension generated in the product to be spooled must be avoided during the process Winding applied by the drive motor of the winding spindle or be overcome. The torque delivered by the drive motor on the winding spindle depends on the control voltage of the Motor and the speed according to the motor characteristic. It there is a torque control. The speed of the winding spindle depends on the delivery speed of the material to be spooled and of the diameter of forming on the winding spindle Kitchen sink.

From EP 0 712 374 B1 a winding machine for a with constant speed running thread known. The dishwasher has a traversing device for reciprocating the thread transverse to its direction. It is a winding spindle provided, which is driven by a motor. As a device for determining one of the stresses in the product to be cooked Signal also serves here a Tänzerarmeinrichtung of two stationary pulleys and one mounted on the dancer arm Pulley. The disadvantage here is that the Spulgut several Pulleys with sometimes considerable wrap angles in revolves in opposite directions. This is the Spulgut with considerable bending stress, also alternating bending, and with corresponding friction forces applied, which in particular in the case of sensitive material to damage or destroy the product Can lead to coarse material.

From DE 29 05 713 C2 is a device for measuring the Tension of a running yarn with fixed yarn guides known ensure a straight path of the running yarn. The yarn passes through a feeder a first fixed head thread guide and about intermediary devices to a second fixed Thread guide, before it runs on a traversing device and finally wound up on the driven winding spindle becomes. The two fixed guides is a power transformer and associated with a Garnauslenkeinrichtung. The power transformer has a yarn contact surface along which the yarn passes rubs and in this way a cantilever in time with the Yarn deflection device bends. About a strain gauge The tension of the yarn is at maximum deflection and measured at the zero crossing of the traversing device. But also Here, the device for determining the voltage in the Spulgut at least two stationary guides on. The disadvantage is in this winder that the Spulgut multiply and in considerable Is stressed on friction, which is sensitive Spulgut is not acceptable.

The invention has the object of providing a winder the to provide initially described type, with the one of the Voltage in the product to be conveyed proportional to as simple as possible Art is generated, which is used to control the drive of the winder under particularly gentle treatment of Spulgutes serves.

According to the invention this is achieved in that the device for determining a voltage in the Spulgut proportional Signal has only a single sensor on one of the Cantilever formed predetermined bending range is arranged that the Cantilever with its intended bending range and the sensor in association to the angle bisector according to arrow between the on the roll incoming and outgoing dough is positioned, and that the signal determined by the device to control the Drive of the winding spindle is used.

The invention is based on the idea of a movable bendable Cantilever arm with a single, stored at its free end Role in the area of the establishment of a to use the voltage proportional to the winding material. This happens at one point and to control the drive of Winding spindle, on the in the prior art, three pulleys be used. It becomes a cantilever arm with a predetermined bending range and a single sensor arranged there. Thus, the effort is particularly low. However, it is required that the cantilever with its intended bending area and the sensor in association with the bisecting line between the positioned on the roll running up and running Spulgut is, so that the movement or deflection relative to the bisector he follows. This provides a simple way to send a signal which via the control device on the drive motor the winding spindle acts. The only role is up stored a movable bendable cantilever. The mobility is limited to a very small area that is in another Order of magnitude is as in the movement of a dancer arm. On the realization of a wrap on the single roll can not to be omitted. However, it is possible by enlargement the diameter of the single roll to the bending radius increase, so the Spulgut comparatively gentler and only in to bend a direction on the roll. The two in the state of Technik known stationary arranged deflection rollers or guides accounted for as separate elements. Your functions will be taken from other facilities. The only role is immediate between the end of the feeder and the Arranged traversing device, d. H. between these Guide points are provided no further pulleys, the would burden the Spulgut. In the prior art, the Stress generated in the product to be spooled between the two pulleys. In the subject of the application, the tension in the Spulgut between the single roller and the winding spindle generated. The tension in the Spulgut is no longer by the dancer arm, but by the Drive the winding spindle causes. The drive motor of the winding spindle is no longer just just deviations in the tension in the Spulgut, but determined solely the tension in Spulgut. The stuffing runs from the single role directly into the traversing device one. Thus, the laying triangle is advantageously increased. The device for determining one of the voltages in the Spulgut proportional signal comes with a comparatively small number of items and is thus compact and inexpensive to produce. Even without additional mechanical Components, such as pulleys, it is possible to different Characteristics of voltage curves during a winding cycle to create. This is therefore easily achievable because the thread tension applied solely by the drive motor of the winding spindle becomes. So z. B. decreasing in the form of software tables, increasing or constant voltage values stored which are easily and reproducibly retrievable. Since that Spulgut only a single role wraps around, is the bending stress Spulgutes and the friction forces considerably reduced. The movement of the only role at the free end of the Kragarms is only a few tenths of a millimeter, d. H. the wrap angle of the dough at the single roll changes only insignificantly and the inlet geometry of the Spulgutes stays almost constant throughout the winding cycle.

The bending beam must have a predetermined bending range in which the strain gauges are arranged. Such a desired bending range can be designed as a weakening of the bending beam, to the elastic bending deformation at this point especially make effective, arranged on the strain gauges are. As the bending beam usually rod-cylindrical shapes has, the predetermined bending range by flattening with be provided flat surfaces on which the strain gauges are particularly easy and effective applicable.

It is particularly advantageous if in the limited area movable cantilever is designed as a bending beam or one Bending beam has. There is a possibility that the cantilever is formed directly as a bending beam, so it only is required, the cantilever clamped on one side store and a bend conveys the over the only role current Spulgutes to use. But it is also possible that The cantilever arm acts only as a lever arm and in turn communicating with a bending beam that passes over the lever arm is bent. In this way it is possible at appropriate Installation conditions to increase the lever arm deliberately. Of the Sensor is located directly on the bending beam. As sensors come in particular strain gauges, but also force sensors, Displacement sensors and the like in question. The respective Sensor can be provided directly with an evaluation with whose help the deflection into an electric Signal, in particular an electrical voltage is transformed. The combination of the sensor with the transmitter allows a small compact design.

The preferred embodiment of the cantilever is the bending beam, which is covered with strain gauges. It is easy possible, the bending beam at its one end in the frame of the Spulmaschine mounted clamped, about in the middle of the Kragarms the desired bending area and the strain gauges to arrange and provide the only role at the free end. It is necessary, the strain gauges in allocation to arrange to the bending plane of the bending beam on the bending beam.

The limited bendable bending beam can in a housing tube be stored. Adjustable stops for limiting the Flexibility are then provided in the housing tube. The adjustable Stops can be realized by adjusting screws become. The housing tube also provides protection for the Bending beam, the sensors and the evaluation electronics.

If the winding machine several Spulköpfe each with one Drive spindle and each has a traversing device, can be assigned to each of the Spulköpfe facilities for Determining a signal proportional to the voltage in the product to be debulked each a single role summarized in a separate machine unit be arranged. The facilities with the only one Roll are then relative in the separate machine unit far from the traversing mechanism of each winding head arranged so that the laying triangle is particularly long and the voltage differences in the Spulgut be small.

Fig. 1

eine schematisierte Seitenansicht der Spulmaschine,

Fig. 2

einen Schnitt durch den Sensor gemäß der Linie II-II in Fig. 1, und

Fig. 3

eine ähnliche Darstellung wie Fig. 1, jedoch an einer Spulmaschine mit 5 Spulköpfen.

Embodiments of the invention will be further clarified and described below with reference to the drawings. Show it:

Fig. 1

a schematic side view of the winder,

Fig. 2

a section through the sensor according to the line II-II in Fig. 1, and

Fig. 3

a view similar to FIG. 1, but on a winder with 5 Spulköpfen.

In Fig. 1, the essential parts of a winder 1 are shown. The winding machine 1 has a machine frame 2, which carries a front panel 3. In the front panel 3 is a Winding spindle 4 rotatably mounted, which in a known manner extends through the front panel 3 and free to the outside ends. The winding spindle 4 is driven by a drive motor, which is not shown for clarity. The winding spindle 4 is limited pivotally about a bearing 5 stored. To enable this pivoting movement is in the Front plate 3 a slot 6 is provided. On the winding spindle 4 a sleeve 7 is attached, on which the Spulgut 8 wound becomes. In solid lines is the beginning of Winding process, so the winding cycle, shown. In double dotted dashed lines is the position of Winding spindle 4 with the winding formed at the end of Winding travel indicated.

In the area of the front plate 3 is in association with the winding spindle 4 a rotatable contact roller 9 mounted stationary. The sleeve 7 on the winding spindle 4 is located at the beginning of the winding cycle on the circumference the contact roller 9 at. This contact will be during the winding cycle through the surface of the forming coil of the Spulgutes. 8 replaced. The contact roller 9 and in particular the winding spindle 4th is associated with a traversing device 10, with the help of known manner, the Spulgut 8 laid over the length of the sleeve 7 becomes.

The Spulgut 8 is the winder 1 via a feed device 11 fed in the direction of arrow 12. The Feeder 11 is not part of the Winder 1 but sits at the end, for example, a Production unit for the Spulgut 8, with the Spulgut 8 is continuously fed to the winder 1. But it is also possible, the charging device 11 in the field of Winding machine 1 to order. The charging device 11 here consists of two the Spulgut 8 leading rollers or rollers with which the Spulgut 8 is performed without change of direction.

On a separate machine unit 13, which is also on the Machine frame 2 is mounted, is a device 14 for Determining one of the tension in Spulgut 8 proportional Signal for controlling the drive of the winding spindle 4 is provided. The device 14 has a cantilever 15, which is substantially is designed as a cylindrical axis. The cantilever 15 is at its one, the machine unit 13 facing the end stored firmly clamped and carries on its freely cantilevered End of a roll 16 over which the Spulgut 8 is passed. The Roller 16 represents the only role or deflection for the Spulgut between the charging device 11 and the traversing device 10 is the cantilever 15 with the roller 16 is relative to the charging device 11 and the traversing device 10 arranged and positioned so that the Spulgut 8 the roller 16 in a corresponding wrap angle wraps. The roller 16 is freely rotatable on the cantilever 15 stored to deflect the Spulgut 8 as gently as possible. The Spulgut 8 is inevitable here a bending stress exposed. It is, however, here - for example in contrast to normal Tänzerarmanordnungen only one bend after a Page, but not a change of bending. In addition, the Diameter of the roller 16 selected comparatively large to the Bending stress to keep small. During the winding journey bends the Spulgut 8 the cantilever 15 with the seated thereon Roller 16 in the direction of arrow 17, which is an angle bisector between the running on the roller 16 and expiring Spulgut results.

The device 14 with the roller 16 replaces the known Tänzerarmanordnung from the state of the art, consisting of two fixed arranged pulleys and a movable, on the dancer arm arranged roll consists. It can be seen that when Subject of the application came the two pulleys in the absence are and the Spulgut free of an alternating bending stress remains. The arrangement of the device 14 on a separate Machine unit 13 provides the possibility of removal between the traversing device 10 and the device 14 as large as possible to make the laying triangle large. But it is also possible, the device 14 in one to arrange other area of the machine frame 2.

It can be seen that the device 14 for determining a the voltages in Spulgut 8 proportional signal for control the drive of the winding spindle 4 basically works differently known Tänzerarmeinrichtungen. While using a Dancerarmes the tension in Spulgut 8 through the dancer arm is generated, which is loaded by springs, weights or the like and the drive motor of the winding spindle 4 only differences in Tension equalizes the application and deployment the tension in Spulgut 8 at the subject of the application alone the drive motor of the winding spindle 4. The only roller 16 of the The subject of the application also fulfills the functions of the two Deflection pulleys in the prior art. The tension in the Spulgut 8 in the prior art between the two pulleys generated. The subject of the application is the tension in the product generated between the winding spindle 4 and the roller 16. At the booth the technology creates the laying triangle between the Changiereinrichtung upstream last pulley of Dancer arm device and the traversing device. The subject of the application creates the laying triangle between the only one Roller 16 and the traversing device 10.

Fig. 2 shows a section along the line II-II in Figure 1 taking into account the direction of arrow 17. It is the Device 14 illustrates. The device 14 has the Cylindrically shaped cantilever 15 in the form of a bending beam 18 on. The bending beam 18 is at its one end 19 mounted clamped in a housing tube 20. The housing tube 20 is in turn mounted on the machine unit 13. This will be held one end 20 of the bending beam 18 so fixed that the other end 21 of the bending beam 18 cantilevered. In the area this end 21, the roller 16 is freely rotatably mounted. Of the Bending beam 18 has in its central region a predetermined bending range 22 on. The desired bending region 22 is by flattening and tapers of the bending beam 18 formed. At this point the bending beam has a plate-shaped part 23 with even Surfaces on which z. B. strain gages 24 arranged are a sensor 25 for detecting the deflection of the Bending beam 18 due to the tension in Spulgut 8 form. in the Area of the end 19 of the bending beam 18 or at least in Housing tube 20 is provided with an evaluation 26, with their help via a cable 27 that of the bending of the bending beam 18 corresponding voltage signal of the not shown Control device for driving the winding spindle 4 supplied becomes.

The housing tube 20 carries adjustable stops 28 for the Limiting the bendability of the bending beam 18 in the direction of the arrow 17. The adjustable stops 28 can as Be set screws. In the front end of the Housing tube 20 is still a seal 29 against the Ingress of dust and other foreign bodies into the interior the housing tube 20 is provided.

Fig. 3 shows a winder 1, on the machine frame second five winding heads 30 are arranged. Each winding head 30 is like this formed, as already described with reference to FIG. 1 has been. A separate machine unit 13 is provided here, on each of which a winding head 30 assigned Facilities 14 are arranged together. The respectively formed laying triangles are different in size. This is not disadvantageous because even the smallest installation triangle still has a considerable length, allowing voltage changes in Spulgut 8 as a result of laying negligible are. These voltage changes are so small that they are aware be damped by the control device for driving the Winding spindle 4 does not respond to such voltage changes.

LIST OF REFERENCE NUMBERS

1 -

Dishwasher

2 -

machine frame

3 -

front panel

4 -

winding spindle

5 -

camp

6 -

Long hole

7 -

shell

8th -

winding material

9 -

contact roller

10 -

Traversing device

11 -

feeder

12 -

arrow

13 -

machine unit

14

Facility

15

cantilever

16

role

17

arrow

18 -

bending beam

19 -

The End

20

housing tube

21 -

The End

22 -

Predetermined bending area

23 -

plate-shaped part

24 -

Strain gauges

25 -

sensor

26 -

evaluation

27 -

electric wire

28 -

attack

29 -

poetry

30 -

winding head

Claims (6)

1. A winding machine (1) for winding up especially sensitive bobbin material (8) arriving from a feeding apparatus (11), comprising a winding spindle (4) being designed and arranged to be rotated by a drive, a traversing apparatus (10) and a unit (14) for determining a signal which is proportional to the tension of the bobbin material (8), the unit (14) including a sensor (25), a movable arm (15) and only one roller (16) being arranged at the free end of the arm (15), the only one roller (16) being designed and arranged to guide the bobbin material (8) to contact the feeding apparatus (11) and the traversing apparatus (10) without contacting other elements in between, characterized in that the unit (14) for determining a signal which is proportional to the tension of the bobbin material (8) includes only one sensor (25) being arranged at a nominal bending portion (22) of the arm (15), in that the arm (15) with its nominal bending portion (22) and the sensor (25) are located with respect to the direction of arrow (17) bisecting the angle between the bobbin material (8) arriving at the roller (16) and leaving the roller (16), and in that the signal determined by the unit (14) is used to control the drive of the spindle (4).
2. Winding machine of claim 1, characterized in that the arm (15) being designed and arranged to be movable to a limited extent is designed as a bending bar (18) or includes a bending bar (18).
3. Winding machine of claim 1, characterized in that the only one sensor (25) being arranged at the nominal bending portion (22) of the bending bar (18) includes a plurality of extensometer strips (24).
4. Winding machine of claim 1 and 2, characterized in that the bending bar (18) being designed and arranged to be bendable to a limited extent is located in a tubular housing (20), and in that a plurality of adjustable stops (28) are designed and arranged to limit deflection of the bending bar in the tubular housing (20).
5. Winding machine of claim 1, characterized in that the unit (14) for determining the signal which is proportional to the tension of the bobbin material includes an electronic unit (26) being arranged in the tubular housing (20).
6. Winding machine of one of the claims 1 to 5, characterized in that the winding machine (1) includes a plurality of winding heads each head being designed and arranged to include a spindle (4) to be rotated by a drive and a traversing apparatus (10), and in that the plurality of units (14) each being assigned to a winding head for determining a signal which is proportional to the tension of the bobbin material (8) of each roller (16) are arranged in a separate machine unit (13).

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