EP1070163A2

EP1070163A2 - Drive device for the parting shafts of circular looms

Info

Publication number: EP1070163A2
Application number: EP99936242A
Authority: EP
Inventors: Jörg STARK; Klaus Hering
Original assignee: Karl Mayer Textilmaschinenfabrik GmbH
Current assignee: Karl Mayer Textilmaschinenfabrik GmbH
Priority date: 1998-04-08
Filing date: 1999-04-03
Publication date: 2001-01-24
Anticipated expiration: 2019-04-03
Also published as: WO1999051805A3; ATE223526T1; AU5147299A; DE19815821C1; WO1999051805A2; EP1070163B1

Abstract

The invention relates to a drive device for the parting shafts of circular looms on which the parting shafts are driven in pairs in opposite directions. Lower band sections are assigned to the parting shafts of each pair. A drive lever which oscillates around a bearing fixed to the frame is connected to said band sections via a coupling. The drive lever comprises at least one jockey roller for interacting with a globoid cam which can be rotationally driven around the vertical axis of the circular loom. In order to reduce the number and the mass of the transmission elements having flat curve inclinations on the globoid cam, the drive device is configured such that the bearing (51; 71) of the drive lever (5; 7), said bearing being fixed to the frame, is arranged outside of the movement plane (220) of each inner parting shaft (22, 22'), and such that the jockey roller (55; 75) and each one of the couplings (52, 53; 72) are arranged on the same side of the bearing (51; 71).

Description

"Drive device for the shafts of circular looms"

The invention relates to a drive device for the partial shafts of circular looms, on which the partial shafts are driven in opposite directions in pairs and guided parallel to one another, on which the partial shafts of each pair are assigned lower belt sections, at least one of which is guided by means of a guide roller, and on which the belt sections one A pair of partial shafts is assigned a drive lever which swings around a fixed bearing, which is connected to these belt sections via at least one coupling and which has at least one sensing roller for interacting with a globiod curve which is rotatably driven about the vertical axis of the circular loom.

A drive device of this type is known, inter alia, from US Pat. No. 4,579,149. The paired shafts are connected to each other at their upper ends by a band. This belt is passed over an upper pulley. Lower belt sections are fastened to both lower shafts at the lower end, of which the outer one is guided around a lower guide roller at a distance below the shed. The two lower band sections are attached to a radially outward arm of a drive lever by means of a partially flexible coupling. The drive lever has its frame-fixed bearing between the plane of movement of the partial shafts and the axis of the machine. A feeler roller is rotatably mounted about a radial axis on a second, inwardly directed arm of the drive lever. This tracer roller works together with a globoid curve, which is guided and driven around the vertical axis of the circular knitting machine.

Such a drive device can be produced quite inexpensively. However, the large forces and the unsatisfactory transmission angles on the globoid curve are problematic. The large translations between the globoid curve and the partial shafts and the large increases in the curves on the globoid curve lead to high wear at the necessary speeds. It was usually helped to keep the subject height within limits. However, this also forced the diameter of the coils on the contactors to be limited.

An additional spreading of the compartments during the passage of the shooter leads to a higher power requirement and to a strong heating of the warp threads. Excessive heating of the warp threads is highly undesirable. The molecular structures of the threads change at certain high temperatures. These threads then lose their necessary high strength. Such a drive device is therefore not suitable for further increasing the productivity of the circular loom.

US Pat. No. 4,821,778 has disclosed a somewhat modified drive device for a pair of shafts on circular looms. One of the lower band sections is connected in the region of an elongated run below the shed with a lifting rod which extends in the plane of movement of a partial shaft. This lifting rod has a carriage at its lower end. The sled carries a feeler roller that engages directly in a cylindrical groove curve. With such a design, the groove curve is less stressed. However, the much greater overall height is disadvantageous. The operation of the machine is significantly more difficult due to the high position of the shed.

The cost of guiding the carriage with the lifting rod is considerable because of the large number of similar drive devices in a circular loom.

This means that such a device is also unsuitable for solving the problems of the present day - higher productivity with good operability and with a simple and low-maintenance machine construction.

The Austrian patent 371 846 has set itself the goal of reducing the extreme height of the machine. It is proposed here that the entire bands - including the strand sections - be flexibly designed for the up and down movements of the strand eyelets for the purpose of training. With such an arrangement, the overall height of the machine can be reduced, but the quality of the shed formation and the reliability of the guiding of all the warp threads is adversely affected. Such an implementation has not prevailed. In the cited patent, the cylindrical drive curve for the flexible belts is arranged directly below the compartment level, within the area of the two lower belt guides. The then shorter carriage for guiding the feeler rollers reduces the costs and the size of the masses to be moved.

In a further drive arrangement for the partial shafts, which is implemented in practice, the partial shafts are guided and driven in a plane inclined upward and outward at approximately 45 °. The opposing partial shafts are connected to an upper band section which is tensioned in the usual way around an upper deflection roller. The lower belt sections are guided around a drive wheel. They are permanently connected to the circumference of the drive wheel by a coupling. The drive wheel in turn is driven by a second belt transmission. For this purpose, the drive wheel has a second drive pulley with a smaller diameter. A carriage is guided in an outwardly displaced, vertically guided section of the second belt, which is moved up and down by a cylindrical cam drum.

With this drive arrangement, the overall height of the machine can also be reduced. The height of the drum curve is significantly reduced by the gear ratio provided.

The compartment used in this context, inclined 45 ° outwards and upwards, improves the usability of the machine. On the other hand, the conditions for the running of the warp threads and for the running and the size of the shooters in the compartment are made much more favorable. It is also advantageous that the drum curve can have a relatively large diameter. The increases in the curves on the drum curve are flat and lead to good transmission ratios.

A disadvantage of this design, however, is the somewhat higher outlay for the second belt drive and for guiding the slide with the feeler rollers and the coupling for each pair of shafts.

The object of the present invention is to provide a drive device of the type mentioned in the introduction, in which the forces on the curve can be kept at a low level, in which the costs for the drive elements are low and which allow a low operating height. This drive device is intended to enable a large compartment opening without the warp threads being additionally loaded by spreading elements.

According to the invention, the object is achieved in a simple manner by the features of claim 1. The arrangement of the drive lever predominantly outside of the plane of movement of the inner part shafts of each pair allows an optimal assignment of the coupling to the band sections on the one hand and the feeler roller of the drive lever to the drive curve in the center of the machine. The large diameter of the globoid curve allows flat curve increases without the movement necessarily having to be translated. In the event that a translation is desired, no additional gear links are required. The size of the compartment opening can be determined in the usual framework solely by the appropriate choice of the dimensions of the elements.

The overall height of the machine and thus the operating height can be kept at a low level. The drive device has few and simple parts. The Globiod curve can be produced on modern machine tools with reasonable effort. The lifespan of most components is long because extreme loads are basically avoided. The lower load also offers opportunities for a further increase in the performance of the working speed of the machine.

The embodiment according to claim 2 enables relatively flat increases in the globoid curve. It is particularly suitable for an embodiment in which the mass of the drive lever is relatively high.

The design according to claim 3 is recommended if the masses in the area of the drive lever are relatively small.

4 allows clear and unambiguous movement conditions of all moving elements.

The drive arrangement according to claim 5 allows the moving masses of the drive lever to be minimized.

The features of claim 6 lead to a high stability of the drive unit with good operability of all drive elements. The effective radius of the globoid curve can be increased. This allows the slopes of the globoid curve to be made flat. The elements designed in this way are easily accessible for operation and maintenance. The embodiment according to claim 7 enables the device to be easily adapted to the conditions of a sloping compartment.

The independent claim 8 defines a drive device specially designed with an inclined shed which also fulfills the task set out above.

Claim 9 describes an advantageous embodiment of this drive device according to Claim 8. The advantages consist in the use of a globoid curve with a large mean diameter.

The invention will be explained in more detail using two exemplary embodiments. In the accompanying drawings:

1: a preferred arrangement of the inventive drive arrangement on a circular loom with an inclined shed,

2: a drive device according to the invention for the partial shafts of a horizontal shed and

3: a second variant of a drive arrangement with an inclined shed.

The partial shaft drive shown in Fig. 1 is preferably provided for a circular loom, the shed of which is inclined upwards in the direction of the inner fabric stop edge.

The warp thread coulters 11, 12 are alternately shifted into the two warp thread levels by means of the partial shafts known per se. The shooter 4 is guided through the compartment thus opened in a manner known per se. The warp thread sheet 11 is guided through the partial shaft 22, while the warp thread sheet 12 is guided through the eyelets of the strands of the partial shaft 21. The partial shafts 21 and 22 are guided at an angle of approximately 45 ° along their movement planes 210 and 220, respectively. The size of the specialist stroke should enable the guiding of a contactor 4 with a relatively large coil. The partial shafts 21, 22 are connected to one another at their upper end by the upper band section 23. This band section 23 wraps around the deflection roller 3 by 180 °.

The lower ends of the partial shafts 21, 22 are held and tensioned by the lower band sections 24, 25. The lower band section 24 is guided via the guide roller 31 fixed to the frame onto the guide section 56 of the drive lever 5 up to the coupling 52 of the drive lever 5.

The belt section 25 partially wraps around the guide roller 32 and is guided from there onto the guide section 57 of the drive lever 5. This lower band section 25 is held by the coupling 53 on the drive lever 5. The drive lever 5 has its bearing 51 between the end sections of the two lower band sections 24, 25. This bearing 51 is fixed to the frame. The drive lever 5 is designed as a segment in its upper region. The curved section of the segment forms the guide sections 56, 57 for the two belt sections 24, 25 and is limited at the bottom by the couplings 52 and 53.

The traction roller bearing 54 is arranged between these couplings 52, 53, preferably detachably mounted. This tracer roller bearing 54 carries two tracer rollers 55, which formally enclose the bead of the globoid curve 6 between them. This globoid curve 6 extends below the circularly arranged shedding zone and is guided by the globoid cam carrier 60 around the vertical longitudinal axis 98 of the circular weaving machine and driven in rotation synchronously with the shooter drive by a corresponding drive device.

This arrangement has the advantage that the drive movement of the partial shafts 21, 22 can be realized in a compact height. The globoid curve 6 can be arranged on a relatively large, medium radius - based on the vertical machine axis.

All guide elements for the partial shafts 21, 22 are subject to stable guidance in each phase of their movement. All drive elements are easily accessible from the operator side. The size of the moving masses can be approximated to an absolutely necessary minimum with the appropriate design and choice of material. The size of the specialist stroke can be designed by simple structural adjustment of the elements so that an optimal functioning of the machine is possible.

The embodiment according to FIG. 2 differs from the device according to FIG. 1 initially in that the shed 1 ′ to be formed here is aligned in the horizontal plane. The warp thread groups 11 'and 12' are moved here by the partial shafts 21 ', 22'. The planes of motion 210 ', 220' of the partial shafts 21 ', 22' are oriented essentially vertically.

The partial shafts 21 ', 22' are connected to one another by the upper band section 23 '. This band section 23 'is guided over the deflection roller 3'. The lower band section 24 'is again guided in the plane of movement 210' by the guide roller 33 and via the guide rollers 36 and 37 outside the drive lever 7 to the guide roller 38, which roughly affects the guide plane 220 '.

The end of this band section 24 'is then directed upwards again and is held by the coupling 72 pivotably mounted on the drive lever 7. From this coupling 72, the lower band section 25 'leads past the guide roller 34 to the lower end of the partial shaft 22'.

The drive lever 7 is guided to swing about the frame-fixed bearing 71. This bearing 71 is preferably located between the guide areas of the lower band sections 24 'and 25'.

At this point it should be pointed out that the bearing 71 can also be arranged outside the lower band section 24 '. In this case, sufficient space must be available for parts of the drive lever 7 to be able to grip the lower band section 24 'laterally at a free distance. In this exemplary embodiment, the globoid curve 8 is arranged very close to the plane of movement 220 'of the inner partial shaft 22'. The radius of this globoid curve 8 is very large in relation to the vertical axis of the machine. In this way, relatively flat increases in the drive curve 8 are possible. The globoid curve 8 is designed here as a groove curve. A single feeler roller 75 of the drive lever 7 preferably engages in this groove curve 8. The globoid curve 8 is attached to the globoid cam carrier 80 here. It is guided by this around the vertical machine axis 98 and driven in a manner known per se.

The advantage of this embodiment is that the moving masses of the drive lever 7 can be significantly reduced. The bearings 71 are easily accessible for maintenance purposes.

With such an embodiment it is also conceivable that the lower band section 24 'can be guided in the movement plane 210' through the movement range of the drive lever 7. In this embodiment, however, the drive lever 7 should be designed such that it has a corresponding recess in the guide region of this band section 24 'and can grip around this band section laterally.

You can also significantly reduce the number of guide or deflection sheets. In this case, the guide rollers 33 and 34 would only have securing functions. The guide rollers 36 and 37 are omitted and the guide roller 38 fulfills the function of a lower deflection roller. The latter should therefore be given an appropriate diameter.

The device according to FIG. 3 shows a drive device for the partial shafts 21, 22 of a circular weaving machine with a shed that is inclined inwards and upwards. The lower band sections 24 ″ and 25 ″ are deflected vertically downward by the guide rollers 31 ′ and 32 ′, guided around the roller 38 ′ and connected to one another in the engagement area of the clutch 92. A drive lever 9, which swings about the bearing 91 fixed to the frame, is connected to the clutch 92 via a coupling. The feeler roller 95 has its bearing on an upward arm of this drive lever 9. It works with the globoid curve 96, which has its bearing on the curve carrier 97. The globoid cam carrier 97 rotates about the vertical machine axis 98. This version is particularly suitable for those circular looms in which, starting from the drive means for the partial shafts with a horizontal shed, the inclination of the movement plane 220, 210 of the partial shafts upwards and outwards want to increase the length of the shed in front of the stop edge. In this way, space is created for larger coils in the contactors 4.

Reference number list

1, 1 'shed

11, 11 'warp thread sheet

12, 12 'warp thread sharp

(2) Drive unit shaft

21, 21 'partnership

210, 210 'plane of movement of the partial shaft

22, 22 'partnership

220, 220 'part of the plane of movement

23, 23 'upper band section

24, 24 ', 24 "lower band section

25, 25 ', 25 "lower band section 3, 3' deflection roller, above

31, 31 'guide roller (in part level, Fig. 1)

32, 32 'guide roller (in part level, Fig. 1)

33, 34 guide roller (in part level, Fig. 2) 36, 37 guide rollers

38, 38 'pulley

4 shooters

5 drive lever 51 bearings

52, 53 clutch

54 tracer roller bearings

55 tracer rollers

56, 57 guide section 6 globoid curve

60 globoid curve carriers

7 drive lever

71 bearings

72 clutch

75 tracer roller

8 globoid curve

80 globoid curve carriers

9 drive lever

91 bearings

92 clutch

95 tracer roller

96 globoid curve

97 curve bearers

98 machine axis, vertical

(Numbers in brackets only have an ordering function. They are not included in the drawings and in the description)

Claims

claims

1. Drive device for the partial shafts of circular looms, on which the partial shafts are driven in opposite directions in pairs and guided parallel to one another, on which the partial shafts of each pair are assigned lower belt sections, at least one of which is guided in the middle of the guide roller and on which the belt sections of a pair of partial shafts a drive lever which is pivoted about a frame-fixed bearing is assigned, which is connected to these belt sections via at least one coupling and which has at least one sensing roller for interacting with a globiod curve which is rotatably driven about the vertical axis of the circular weaving machine, characterized in that the frame-fixed bearing (51; 71) of the drive lever (5; 7) outside the

Plane of movement (220) of the respective inner partial shaft (22, 22 ') is arranged and that the feeler roller (55; 75) and one of the couplings (52, 53; 72) are arranged on the same side of the bearing (51; 71) .

2. Drive device according to claim 1, characterized in that the feeler roller (55) on the drive lever (5) is arranged radially within the range of motion of the clutch (52, 53) and that on both sides of the feeler roller (55) each have a clutch (52, 54) a lower band section (24, 25) is provided on the drive lever (5).

3. Drive device according to claim 1, characterized in that the feeler roller (75) of the drive lever (7) is mounted radially outside the coupling (72) and that both ends of the lower band sections (24 ', 25') on the single one

Coupling (72) are held.

4. Drive device according to claim 1 and one of claims 2 or 3, characterized in that the lower band sections (24; 24 ', 25; 25) near the range of movement of the coupling (52, 53; 72) guide elements (56, 57; 34 , 38) are assigned.

5. Drive device according to claim 4, characterized in that the guide elements are arcuate guide sections (56, 57) on the drive lever (5) which are adjacent to the respective coupling (52, 53) and directed to the run-up point of the respective band section (24, 25) .

6. Drive device according to claim 4, characterized in that the guide elements are rigidly mounted guide rollers (34, 38) whose tangential outlet point in the central position of the drive lever (7) is approximately perpendicular to the radius of the associated coupling (72).

7. Drive device according to claim 1, characterized in that frame-fixed guide rollers (31, 32) which the plane of movement of their

Partial shafts 21, 22 tangent to the outside, are provided for each lower band section (24, 25) and that on the drive lever (5) on both sides of the feeler roller (55) the couplings (52, 53) have guide arches (56, 57) for the band sections (24 , 25) are assigned.

8. Drive device for the partial shafts of circular looms, on which the partial shafts are driven in opposite directions in pairs and are guided in pairs parallel to one another in an upward and outward inclined plane, on which the partial shafts of each pair are assigned lower belt sections, at least one of which is guided by means of a guide roller and on which the belt sections of a pair of partial shafts are assigned a drive means which swings about a fixed bearing, which is connected to these belt sections via at least one coupling and which is driven directly or via intermediate elements by a cam mechanism which consists of a around the vertical axis of the circular loom rotatably driven curve and consists of at least one sensing roller, characterized in that the oscillating drive means is designed as an angular drive lever (9) which has a bearing for the sensing roller (95) at a distance from its frame-fixed bearing (91) , and that the rotatably driven curve is a globoid curve (96) which is arranged on the end face of its carrier and which is adapted to the movement path of the sensing roller (95).

9. Drive device according to claim 8, characterized in that the lower band sections (24 ", 25") immediately below the

A guide roller (31 ', 32') is assigned to the range of motion of the partial shafts (21, 22),

- Which affect the plane of movement of the partial shafts (21, 22) on the outside and

- Which are at least partially wrapped around by the lower band sections (24 ", 25"), and that the coupling (92) between the drive lever and the lower band sections (24 ", 25") are arranged below these guide rollers (31 ¹ , 32 ') is.