RU1813065C - Device for unwinding coils, for instance coils of package-manufacturing machine - Google Patents

Abstract

The invention relates to equipment for the production of paper containers, in particular to bag making machines. The purpose of the invention is to increase operational reliability by additionally supporting the middle part of the roll when unwinding one of the parts of the paper cut on the roll holder. The roll holder comprises a shaft in the form of housings mounted in the arm supports. New in the roll holder is the implementation of a hollow shaft with radial through grooves for accommodating additional support-centering elements in the form of two-link hinge mechanisms mounted movably inside the shaft and pivotally connected at one end to the shaft and the other with a drive inserted into the device and made in the form of a screw-nut pair. 2 ill.

Description

The invention relates to equipment for production of paper containers, in particular for bag making machines.

It is an object of the invention to increase reliability by additionally supporting the middle part of the roll while unwinding one of the pieces of paper.

In FIG. 1 shows a general view of the roll holder; figure 2 - section aa in fig. 1.

The roll holder comprises a hollow shaft 2 mounted in the bearings of the levers 1 with support-centering elements in the form of cones 3 and two-link articulated mechanisms 4 mounted inside the shaft with the possibility of movement in through grooves equally spaced around the circumference

5 of shaft 2, Three two-link hinge mechanisms 4 equally spaced around the circumference with a rear end are pivotally connected to shaft 2 and the other to a nut 6 moved by screw 7. mounted inside shaft 2. Roll 8 with sleeve 9 is put on shaft 2,

The roll holder operates as follows.

A shaft 3 is threaded through the sleeve 9 and installed in the support-centering cones 3. In this case, additional two-link hinge mechanisms 4 are recessed with respect to the outer diameter of the shaft 2. Using a lifting device, the shaft 2 is installed in the bearings of the levers 1. Rotating the screws 7 of the nut 6 move to price

about eating

s

shaft 2. In this case, the two-link hinge mechanisms 4 are pushed into the grooves 5 until they touch the inner surface of the sleeve 9. With further rotation of the screws 7, additional two-link hinge mechanisms 4 are pressed into the sleeve 9, providing additional centering and engagement with the sleeve 9, and therefore with the roll 3. When cutting the roll 8 and winding one of the parts, despite the uneven loading of the roll 8 on the sleeve 9, it does not deform and does not turn on the cones 3 due to the support of additional two-Even-hinge mechanism 4.

The proposed technical solution allows by introducing additional supports to increase the reliability of the roll holder, which allows you to cut the roll directly on the roll holder to the width of the paper tape necessary for the manufacture of the package size, and

0

5

0

winding off the cut part directly from the roll,

Claims (1)

SUMMARY OF THE INVENTION A device for unwinding rolls, for example, a bag making machine, comprising a shaft mounted in lever supports with support-centering elements made in the form of cones, characterized in that, in order to increase operational reliability by additionally fixing the middle part of the roll when unwinding one of parts of the cut roll, the shaft is hollow with at least a pair of longitudinal slots, and inside it is mounted a pair of additional support-centering elements, each of which ying in the form housed in corresponding slots of two-link hinge mechanism, one arm of which is fixedly secured within the shaft and the other is mounted for axial movement and fixing its position.