GB2058721A

GB2058721A - Device for Winding-up Webs

Info

Publication number: GB2058721A
Application number: GB8027257A
Authority: GB
Original assignee: HANSA TECHNIK GmbH
Current assignee: HANSA TECHNIK GmbH
Priority date: 1979-09-26
Filing date: 1980-08-21
Publication date: 1981-04-15
Also published as: IT1136061B; DE2938865A1; GB2058721B; DE2938865C2; FR2465676B1; FR2465676A1; IT8009542A0

Abstract

A device for winding-up a length of paper web (22), emerging from a photo-copying machine, has (spring clip) devices (15) which restrict the winding space from the outside and at least one roller (12, 13) for guiding and/or driving the web. To make the devices (15) more easy to replace, they are provided with a holding means (21) which is supported, at least on one side, on the roller (12 or 13). The holding means may be a half- open resilient clip (14), with one end snapped onto the circumference of the roller (12), and the other end supported on the roller (13). <IMAGE>

Description

SPECIFICATION Device for Winding-up a Continuous Length of Material In the winding-up of the continuous length of material emerging from a photo-copying machine, the use of a set of spiral springs, which are arranged in line and restrict the winding space from outside, is known from German Utility Model 7,232,971. In the course of time, these windingup devices can lose their intended shape and must then be replaced, an operation which is rendered troublesome by the way in which they are mounted. Thus, they have to be located, on the one hand, above the guide and drive rolls provided beneath the paper path and, on the other hand they have to be attached to a stationary machine component behind or underneath these rolls.

The object of the invention is to produce a device of the type specified in the precharacterising clause of Claim 1 , this device being more easy to replace.

This objective is achieved, according to the invention, on the basis of the characterising features of Claim 1 which, stated briefly, are such that the rolls provided on the path of the continuous lengths of material to be wound up are brought into use for holding and supporting the winding-up devices.

The holding means advantageously possesses a bearing circlip, which at least approximately half-surrounds a roll. The position of the holding means is thereby clearly defined, a precondition being that the bearing circlip is of sufficient length in the longitudinal direction of the roll or that it is laterally guided by shoulders on the roll. The other end of the holding means is supported on a machine component, most particularly on a second roll. An embodiment in which the bearing circlip is designed as a resilient half-open clip, which can be snapped over the roll, has proved particularly satisfactory. To avoid unnecessary friction and wear, at least that part of the holding means which interacts with the rotating rolls is made from a low-friction material, polyethylene or polyvinyl chloride, for example.In contrast, the shoulders on the rolls consist of a material with a high coefficient of friction, if they also have a drive function.

In the following text, the invention is explained in greater detail, by reference to the drawing, which illustrates an advantageous embodiment and in which: Fig. 1 shows a vertical section, and Fig. 2 shows a plan view of the device.

The cylinder 5, the wrap-around belts 7 and the rolls 1 to 4 of the photo-copying machine are shown in the right-hand part of the figures. The continuous length of material, which is to be wound up, emerges from the photo-copying machine at 22, the path of the material being indicated by the dashed line. The path runs over two rolls 12, 13, which possess external shoulders or rings 1 which interact with the continuous material to guide it and, if necessary, to drive it. Leaf-springs 10, which are attached at 9 to a part 8 of the casing of the photo-copying machine, press the continuous length of paper against the rings 11 of the roll 12, in order to assure the drive.

The winding-up space 20 is restricted by means of springs 1 5, which are arranged in line behind each other, each being attached to a holding means 21. This holding means consists of a PVC moulding, which possesses a substantially horizontal elongated main section, the left-hand end of which is supported on the roll 13, whilst the right-hand end possesses a bearing circlip 14, which is snapped onto the roll 12. The unstressed internal diameter of the bearing circlip 14 is slightly larger than the external diameter of the roll 12, so that, on the one hand, good guidance and, on the other hand, low friction is ensured.

The holding means 12, together with the spring 15, is easily replaceable, because it is merely necessary to snap the bearing circlip 14 onto the roll 1 2. Furthermore, the illustrated arrangement has the advantage that the holding means and the spring 1 5 always possess the same defined position reiative to the rolls 12 and 13.

It can be seen from Figure 2, that the shoulders or rings 11 of the roll 12 are located at a very small axial distance from the holding means 21 and thereby fix the latter laterally.

Claims

1. A device for winding-up a continuous length of material, particularly a length of paper, emerging from a photo-copying machine or similar machine, having devices for restricting a winding space from the outside and having at least one roll for guiding and/or driving the continuous length of material, characterised in that the devices for restricting the winding space possess a holding means, which is supported, at least on one side, on the roll.

2. A device according to Claim 1, characterised in that the holding means has a bearing circlip which at least approximately half-surrounds the roll.

3. A device according to Claim 2, characterised in that the holding means is supported, at its end remote from the bearing circlip, on another machine component which does not change its position.

4. A device according to Claim 3, characterised in that two rolls are located on the path of the continuous material and the other end of the holding means is supported on the second roll.

5. A device according to one of Claims 1 to 4, characterised in that the bearing circlip is designed as an approximately half-open resilient clip, which can be snapped onto the circumference of the roll.

6. A device according to one of Claims 1 to 5, characterised in that the roll hes a shoulder on each side of the zone reserved for mounting the

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

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Device for Winding-up a Continuous Length of Material In the winding-up of the continuous length of material emerging from a photo-copying machine, the use of a set of spiral springs, which are arranged in line and restrict the winding space from outside, is known from German Utility Model 7,232,971. In the course of time, these windingup devices can lose their intended shape and must then be replaced, an operation which is rendered troublesome by the way in which they are mounted. Thus, they have to be located, on the one hand, above the guide and drive rolls provided beneath the paper path and, on the other hand they have to be attached to a stationary machine component behind or underneath these rolls. The object of the invention is to produce a device of the type specified in the precharacterising clause of Claim 1 , this device being more easy to replace. This objective is achieved, according to the invention, on the basis of the characterising features of Claim 1 which, stated briefly, are such that the rolls provided on the path of the continuous lengths of material to be wound up are brought into use for holding and supporting the winding-up devices. The holding means advantageously possesses a bearing circlip, which at least approximately half-surrounds a roll. The position of the holding means is thereby clearly defined, a precondition being that the bearing circlip is of sufficient length in the longitudinal direction of the roll or that it is laterally guided by shoulders on the roll. The other end of the holding means is supported on a machine component, most particularly on a second roll. An embodiment in which the bearing circlip is designed as a resilient half-open clip, which can be snapped over the roll, has proved particularly satisfactory. To avoid unnecessary friction and wear, at least that part of the holding means which interacts with the rotating rolls is made from a low-friction material, polyethylene or polyvinyl chloride, for example.In contrast, the shoulders on the rolls consist of a material with a high coefficient of friction, if they also have a drive function. In the following text, the invention is explained in greater detail, by reference to the drawing, which illustrates an advantageous embodiment and in which: Fig. 1 shows a vertical section, and Fig. 2 shows a plan view of the device. The cylinder 5, the wrap-around belts 7 and the rolls 1 to 4 of the photo-copying machine are shown in the right-hand part of the figures. The continuous length of material, which is to be wound up, emerges from the photo-copying machine at 22, the path of the material being indicated by the dashed line. The path runs over two rolls 12, 13, which possess external shoulders or rings 1 which interact with the continuous material to guide it and, if necessary, to drive it. Leaf-springs 10, which are attached at 9 to a part 8 of the casing of the photo-copying machine, press the continuous length of paper against the rings 11 of the roll 12, in order to assure the drive. The winding-up space 20 is restricted by means of springs 1 5, which are arranged in line behind each other, each being attached to a holding means 21. This holding means consists of a PVC moulding, which possesses a substantially horizontal elongated main section, the left-hand end of which is supported on the roll 13, whilst the right-hand end possesses a bearing circlip 14, which is snapped onto the roll 12. The unstressed internal diameter of the bearing circlip 14 is slightly larger than the external diameter of the roll 12, so that, on the one hand, good guidance and, on the other hand, low friction is ensured. The holding means 12, together with the spring 15, is easily replaceable, because it is merely necessary to snap the bearing circlip 14 onto the roll 1 2. Furthermore, the illustrated arrangement has the advantage that the holding means and the spring 1 5 always possess the same defined position reiative to the rolls 12 and 13. It can be seen from Figure 2, that the shoulders or rings 11 of the roll 12 are located at a very small axial distance from the holding means 21 and thereby fix the latter laterally. Claims

6. A device according to one of Claims 1 to 5, characterised in that the roll hes a shoulder on each side of the zone reserved for mounting the holding means, this shoulder fixing the mounting iaterally.

7. A device according to Claim 6, characterised in that the shoulder consists of a material possessing a high coefficient of friction.

8. A device according to one of Claims 1 to 7, characterised in that at least those parts of the holding means which interact with the surface of a roll consist of a material with a low coefficient of friction, particularly a plastic.

9. A device for winding-up a continuous length of material substantially as hereinbefore described, with reference to, and as illustrated in, the accompanying drawings.