GB2056014A

GB2056014A - Guide Roll Arrangement for a Tangential Drive Belt of a Spinning Machine

Info

Publication number: GB2056014A
Application number: GB8025700A
Authority: GB
Original assignee: SKF Kugellagerfabriken GmbH
Current assignee: SKF GmbH
Priority date: 1979-08-07
Filing date: 1980-08-06
Publication date: 1981-03-11
Also published as: IT1149816B; IT8023492A0; DE7922482U1; FR2463206A1

Abstract

In a guide roll arrangement for a tangential drive belt of a spinning machine, two guide rolls (9,10) are provided on a common support (11) for engaging opposite sides of the drive belt (4). One roll (10) is resiliently mounted for movement relative to the other roll (9). <IMAGE>

Description

SPECIFICATION Guide Roll Arrangement for a Tangential Drive Belt for a Spinning Machine In a known practical guide roll arrangement for the idle return run of an endless tangential drive belt of a spinning machine, the other run of the belt driving a number of spinning devices disposed one beside another, a common support is provided for two guide rolls disposed one each on opposite surfaces of the belt, the spindle of one guide roll being non-displaceable whereas the spindle of the other guide roll is so disposed in the support as to be securable therein and to be adjustable radially of the first guide roll. The fact that one of the rolls is adjustable enables the belt to be guided without play and possibly with tension and also permits adaptation to the thickness of the particular belt used.The adjusting work which must be carried out on very many guide roll arrangements for this purpose needs great care to ensure that radial forces of undefined strength do not act on the guide rolls, and the work is correspondingly costly. In this kind of guide roll system-i.e., a kind which is rigid in operation-the guide rolls experience impacting each time the belt seam passes by and the impacting loads the roll bearings heavily and causes -noise.

In one aspect the invention provides a belt drive in which the belt is guided between two adjacent rolls, one of the rolls being resiliently mounted for movement relative to the other roll.

In another aspect the invention provides a guide roll arrangement for the idle return of an endless tangential drive belt of a spinning machine, the other run of the belt driving a number of spinning devices disposed one beside another, two guide rolls which are associated one each with opposite surfaces of the belt being disposed on a common support, characterised in that one guide roll is disposed on the support for resilient movement relatively to the track of the belt.

The resiliently movable guide roll may be disposed at the free end of a holder which may be made of an inherently resilient substance and whose other end may be secured to the support.

The holder may be so secured to the support as to be releasable and to project selectively to either side.

An embodiment of the invention will now be described by way of example, reference being made to the accompanying drawings, of which: Figure 1 is a plan view of a spindle bank of a spinning and twisting machine, and Figure 2 is a side view in section on the line Il-Il of Figure 1.

Bearing cases 2 for spinning and twisting spindles are disposed one beside another in a row in a multi-segment spindle bank 1; one run 4a of a tangential drive belt 4 is pressed by pressing rollers (not shown) against wharves 3 of the spindles. Belt 4 is driven by drive pulley 5 of an electric motor 6 disposed at one end of bank 1 and reverses around a reversing pulley 7 at the other end of bank 1. Associated with the idle return run 4b of the belt are a number of guide rolls; preferably, one guide roll arrangement 8 is associated with each spindle bank segment.

The arrangement 8 comprises two guide rolls 9, 10 so mounted on a common support 11 as to bear on opposite surfaces of belt run 4b. The angled support 11 has one arm in contact with bank 1 and is secured thereto by two screws 12.

Spindle 1 3 of guide roll 9 is screwed rigidly into the latter arm. Secured by screws 14 to the other arm of support 11, the latter arm being perpendicular to the plane of bank 1, is one end of a holder 1 5 which in other respects projects from the arm and which is made of an inherently resilient or flexible substance, preferably strip steel. Secured to the free end of holder 1 5 is angled support member 1 6 to which spindle 17, which extends parailel to spindle 13, of guide roll 10 is rigidly secured, e.g. by riveting.

The supports 11 are so disposed along the bank 1 that the guide rolls 9 form a firm guideway for one surface of belt run 4b. Also, the securing of the supports 11, and the securing of the holders 1 5 thereto, are so devised that, when the guide rolls 10 bear on the other belt surface, the holders 1 5 are preloaded and urge the run 4b into correspondingly firm engagement with the guide rolls 9. The run 4b is therefore guided without play. There is no need for special adjustments of the guide rollers. Impacts caused by the belts do not affect the system since the rolls 10 can yield resiliently. This guide roll arrangement therefore adapts without adjustment to different belt thicknesses and is operative in the manner described irrespective of the state of belt tension.

The arrangement is suitable for use when the belt runs in the opposite direction to that indicated by the arrow in Figure 1, for after the screws 14 have been released, the holder 1 5 can be so secured to the other side of support 11 as to project therefrom-i.e., so that the holder 1 5 always projects from the support 11 in the opposite direction to the direction of movement of belt run 4b, a feature necessary for the tendency of the guide roll 10 to engage with the belt run 4b.

The guide roll arrangement described can of course be used for a spindle drive other than the one described, e.g. on an open-end spinning machine for the return run of the tangential belt which drives the spinning rotors or the sliver breakers.

Claims

1. A belt drive in which the belt is guided between two adjacent rolls, one of the rolls being resiliently mounted for movement relative to the other roll.

2. A guide roll arrangement for the idle return of an endless tangential drive belt of a spinning machine, the other run of the belt driving a number of spinning devices disposed one beside another, two guide rolls which are associated one

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Guide Roll Arrangement for a Tangential Drive Belt for a Spinning Machine In a known practical guide roll arrangement for the idle return run of an endless tangential drive belt of a spinning machine, the other run of the belt driving a number of spinning devices disposed one beside another, a common support is provided for two guide rolls disposed one each on opposite surfaces of the belt, the spindle of one guide roll being non-displaceable whereas the spindle of the other guide roll is so disposed in the support as to be securable therein and to be adjustable radially of the first guide roll. The fact that one of the rolls is adjustable enables the belt to be guided without play and possibly with tension and also permits adaptation to the thickness of the particular belt used.The adjusting work which must be carried out on very many guide roll arrangements for this purpose needs great care to ensure that radial forces of undefined strength do not act on the guide rolls, and the work is correspondingly costly. In this kind of guide roll system-i.e., a kind which is rigid in operation-the guide rolls experience impacting each time the belt seam passes by and the impacting loads the roll bearings heavily and causes -noise. In one aspect the invention provides a belt drive in which the belt is guided between two adjacent rolls, one of the rolls being resiliently mounted for movement relative to the other roll. In another aspect the invention provides a guide roll arrangement for the idle return of an endless tangential drive belt of a spinning machine, the other run of the belt driving a number of spinning devices disposed one beside another, two guide rolls which are associated one each with opposite surfaces of the belt being disposed on a common support, characterised in that one guide roll is disposed on the support for resilient movement relatively to the track of the belt. The resiliently movable guide roll may be disposed at the free end of a holder which may be made of an inherently resilient substance and whose other end may be secured to the support. The holder may be so secured to the support as to be releasable and to project selectively to either side. An embodiment of the invention will now be described by way of example, reference being made to the accompanying drawings, of which: Figure 1 is a plan view of a spindle bank of a spinning and twisting machine, and Figure 2 is a side view in section on the line Il-Il of Figure 1. Bearing cases 2 for spinning and twisting spindles are disposed one beside another in a row in a multi-segment spindle bank 1; one run 4a of a tangential drive belt 4 is pressed by pressing rollers (not shown) against wharves 3 of the spindles. Belt 4 is driven by drive pulley 5 of an electric motor 6 disposed at one end of bank 1 and reverses around a reversing pulley 7 at the other end of bank 1. Associated with the idle return run 4b of the belt are a number of guide rolls; preferably, one guide roll arrangement 8 is associated with each spindle bank segment. The arrangement 8 comprises two guide rolls 9, 10 so mounted on a common support 11 as to bear on opposite surfaces of belt run 4b. The angled support 11 has one arm in contact with bank 1 and is secured thereto by two screws 12. Spindle 1 3 of guide roll 9 is screwed rigidly into the latter arm. Secured by screws 14 to the other arm of support 11, the latter arm being perpendicular to the plane of bank 1, is one end of a holder 1 5 which in other respects projects from the arm and which is made of an inherently resilient or flexible substance, preferably strip steel. Secured to the free end of holder 1 5 is angled support member 1 6 to which spindle 17, which extends parailel to spindle 13, of guide roll 10 is rigidly secured, e.g. by riveting. The supports 11 are so disposed along the bank 1 that the guide rolls 9 form a firm guideway for one surface of belt run 4b. Also, the securing of the supports 11, and the securing of the holders 1 5 thereto, are so devised that, when the guide rolls 10 bear on the other belt surface, the holders 1 5 are preloaded and urge the run 4b into correspondingly firm engagement with the guide rolls 9. The run 4b is therefore guided without play. There is no need for special adjustments of the guide rollers. Impacts caused by the belts do not affect the system since the rolls 10 can yield resiliently. This guide roll arrangement therefore adapts without adjustment to different belt thicknesses and is operative in the manner described irrespective of the state of belt tension. The arrangement is suitable for use when the belt runs in the opposite direction to that indicated by the arrow in Figure 1, for after the screws 14 have been released, the holder 1 5 can be so secured to the other side of support 11 as to project therefrom-i.e., so that the holder 1 5 always projects from the support 11 in the opposite direction to the direction of movement of belt run 4b, a feature necessary for the tendency of the guide roll 10 to engage with the belt run 4b. The guide roll arrangement described can of course be used for a spindle drive other than the one described, e.g. on an open-end spinning machine for the return run of the tangential belt which drives the spinning rotors or the sliver breakers. Claims

2. A guide roll arrangement for the idle return of an endless tangential drive belt of a spinning machine, the other run of the belt driving a number of spinning devices disposed one beside another, two guide rolls which are associated one each with opposite surfaces of the belt being disposed on a common support, characterised in that one guide roll is disposed on the support for resilient movement relatively to the track of the belt.

3. An arrangement according to claim 2, characterised in that the resiliently movable guide roll is disposed at the free end of a holder which is made of an inherently resilient substance and whose other end is secured to the support.

4. An arrangement according to claim 3, characterised in that the holder is secured to the support so as to be releasable and to project selectively to either side.

5. A belt drive substantially as herein described with reference to and as shown in the accompanying drawings.