GB2071275A - Transverse roller motion adjustment device - Google Patents

Abstract

A transverse motion device for imparting an oscillatory lateral motion to the lengthwise travel of a web of for example textile material, comprises a roller (2) rotatable about an axis (6). An end portion (1) has a radially adjustable stub shaft (7) by which the end of the roller may be moved radially, so that the end of the roller is eccentrically mounted. The stub shaft (7) is part of a carriage (5) slidably mounted in the end portion (1) for radial movement. The carriage is thus moved by a threaded nut (13) on a threaded spindle (14) at the outer end of which is fixed a pinion (12) rotatable by an internally toothed rim (9) of a manually rotatable setting ring (10). Turning of the setting ring causes eccentric adjustment movement as required of the stub shaft. <IMAGE>

Description

SPECIFICATION Traverse motion device This invention relates to a traverse motion device. Such a traverse motion device imparts an oscillatory lateral motion to the lengthwise travel of a web, of for example textile, paper or foil. A traverse motion device is known which comprises a rotatable cylinder pivotally mounted at both its ends, one end executing a precessional motion by being eccentrically mounted, and the cylinder being rotatably mounted on a shaft to which it is connected by a planet gearing. The pinion of the planet gearing is rotatably mounted on a pin carried by the cylinder, one sun wheel of the planet gearing being fixed to the shaft and another sun wheel being fixed to a stationary eccentric end face. An eccentric pivot pin is adjustable in its eccentricity on the eccentric end face and is mounted in a pivot bearing.

Our prior Patent No. 1,414,220 discloses such a traverse motion device. It has a cylinder with an axially mounted joint at one end thereof, the axis of the cylinder rotating about the pivot point of the joint by means of an eccentric mounting at the opposite end of the cylinder. A precessional motion is thereby produced by the cylinder rotating about its precessional axis. The magnitude of the precessional motion of the cylinder may be selected by infinite adjustment of the eccentric pivot pin or by its arrangement as an adjustable crank arm. The frequency of the traverse motion may be varied by choice of the number of teeth of the sun wheels and of the pinion of the planet gearing.This defines the adjustment of the displacement of the web to the roll on which it is wound and ensures that it will be wound without creasing, as well as enabling the frequency of the traverse motion to be adjusted to the material of the web in question. This known arrangement does not, however, enable the magnitude of the eccentricity, and hence of the precessional motion, to be adjusted while the traverse motion device is in operation.

It is an object of this invention to provide a traverse motion device in which the magnitude of the eccentricity of the traverse motion roller may be selectively adjusted with little manual effort, both when the device is at a standstill and is in operation, and which at the same time enables accurate adjustment of the eccentricity or precession movement of the device to be achieved.

According to this invention a traverse motion device comprises a rotatable cylinder or roller pivotally mounted at each end, one of which has an end portion mounted on a stub shaft which is adjustably movable laterally of the cylinder axis to provide for precession motion of the cylinder, wherein i) the stub shaft is connected to a carriage which is mounted in the end portion for movement laterally of the cylinder axis; ii) the carriage is laterally displaceable by being engaged with a threaded spindle, the latter being rotatable by gearing or other motion transmitting means; and iii) the gearing or other motion transmitting means incudes a setting ring member rotatably mounted on the end portion, the arrangement being such that rotation of the ring member causes the threaded spindle to rotate to displace the carriage and stub shaft laterally of the cylinder axis.

An advantage of the invention is that all the components required for adjustment of the eccentricity of the eccentric stub shaft or pivot pin, and hence of the magnitude af the precession motion, are accommodated within the cylinder.

The means for adjustment are directly situated in the circumferential region of the cylinder wall and may comprise a setting ring situated at the end face thereof, which can be easily adjusted manually. Rotation of the setting ring which may be rotatably mounted behind a collar at the circumference of a cover on the end portion, and hence rotation of a toothed rim fixed to the internal edge of the setting ring, causes a pinion, which engages with the toothed rim and which is fixed to the end of a threaded spindle, to rotate about the axis of pinion and spindle, which spindle is rotatably mounted inside the end portion of an axis perpendicular to the cylinder axis.As the pinion and threaded spindle rotate together, the internally threaded nut meshing with them is displaced along the spindle, together with the carriage which is fixed to the internally threaded nut, and the stub shaft attached to the carriage.

The position of the stub shaft can thus be adjusted to a position between the axial centre of the traverse motion cylinder and the maximum radius of the end portion according to the positioning of the setting ring, whereby the precession motion or eccentricity of the cylinder is infinitely adjustable from zero to a maximum. One advantage is that the ready adjustment of such a setting ring enables accurate and sensitive adjustment of the eccentricity to be achieved, and also that the adjustment may be carried out whether the traverse motion device is at rest or is in operation.

The magnitude of the eccentricity may be set on a scale provided both on the end portion and on the carriage and corresponding to one another.

An embodiment of the invention will now be described by way of example with reference to the drawing, in which: Figure 1 is a section through the eccentrically operating end portion of a traverse motion device cylinder with an inserted cover, threaded spindle and eccentric pivot mounting pin; and Figure 2 is an elevation of the end portion, showing a carriage.

Referring to the drawing, there is seen the eccentric end cap or portion 1 of a traverse motion device cylinder or roller 2 with a cover 4 attached by screws 3. Inside the cover 4, a carriage 5, to which is attached an eccentric pivot stub shaft or mounting pin 7 which is parallel to the axis 6 of the roller 2, is displaceable in a plane 8 perpendicular to the axis 6. A setting ring 10 is rotatably mounted on the circumference of the eccentric end portion 1. The ring 10 has an internal toothed rim 9 (Figure 1) and a collar 11 which overlaps the cover 4 as shown. The toothed rim 9 engages a pinion 12 (see also Figure 2) situated at the end of a threaded spindle 13 which is rotatably mounted inside the cover 4 perpendicular to the axis 6 and which co-operates with the thread of an internally threaded nut 14 fixed to the carriage 5.

Figure 2 shows the eccentric end portion 1 in elevation. The cover 4 is situated behind the collar 11 of the setting ring 10 which is rotatably mounted on the circumference of the end portion.

The carriage 5 with the eccentric pivot mounting pin 7 is displaceable on the threaded spindle 13 inside the cover 4.

When the setting ring 10 is rotated, both the pinion 12 and the threaded spindle 13 are rotated, and the threaded nut 14 and the carriage 5 together with the eccentric pivot mounting pin 7, are displaced. The magnitude of the displacement, which is equal to the eccentricity x of the traverse motion cylinder 2 in relation to its axis 6, is indicated on a scale 15, 16 provided on the cover 4 and the carriage 5, and may vary from zero to a maximum, as required.

Claims (5)

1. Traverse motion device comprising a rotatable cylinder or roller pivotally mounted at each end, one of which has an end portion mounted on a stub shaft which is adjustably movable laterally of the cylinder axis to provide for precession motion of the cylinder, wherein i) the stub shaft is connected to a carriage which is mounted in the end portion for movement laterally of the cylinder axis: ii) the carriage is laterally displaceable by being engaged with a threaded spindle, the latter being rotatable by gearing or other motion transmitting means; and iii) the gearing or other motion transmitting means includes a setting ring member rotatably mounted on the end portion, the arrangement being such that rotation of the ring member causes the threaded spindle to rotate to displace the carriage and stub shaft laterally of the cylinder axis.

2. A device according to claim 1 wherein i) the axis of the stub shaft is parallel to the axis of the cylinder; ii) the carriage is displaceable radially of the axis of the cylinder and in a plane at right angles thereto; iii) the carriage includes an internally threaded portion on an externally threaded spindle rotatably mounted in the end portion; iv) the gearing includes a pinion gear connected to the threaded spindle for rotation thereof and teeth on the inside of the setting ring member in engagement with the pinion gear; and v) the setting ring member is rotatably mounted on the periphery of the end portion.

3. A device according to claim 1 or claim 2 wherein the amount displacement and eccentricity of the stub shaft is indicated on the end portion.

4. A device according to claim 3 wherein the said amount is indicated by a graduated scale on the end portion.

5. Traverse motion device constructed and arranged substantially as herein described and shown in the drawings.