Unwinding means

Abstract

An unwinder for a sheet material has a housing and has crosspieces arranged laterally in the housing. To ensure the functionality of the unwinder even in the case of relatively large winding cores or of relatively large rollers, the crosspiece is connected, in a releasable and non-releasable manner, to an accommodating element of which the surface-area portions, which correspond to the crosspiece, enclose the crosspiece and have accommodating surfaces for the product which is to be unwound.

Claims

1. Unwinder comprising: a housing, first and second crosspieces disposed laterally in the housing, first and second accommodation elements connected to the first and second crosspieces, respectively, and comprising surface sections and accommodation surfaces, and a disk, wherein the surface sections correspond to the first and second crosspieces and enclose the first and second crosspieces, respectively, in releasable or non-releasable manner, and wherein the accommodation surfaces are for the product to be unwound and comprise arc-shaped projections that extend perpendicularly from the disk, that extend from the crosspiece in a radial direction, and that have an elasticity so that an outer diameter of the arc-shaped projections can accommodate different diameters.

2. Unwinder according to claim 1, wherein the housing has a length of at least 340 mm, a width of at least 840 mm, and a height of at least 700 mm.

3. Unwinder according to claim 1, wherein the crosspiece has a length of 15 mm, and wherein the disk is disposed laterally on the face sides of the housing and has a diameter of 45 mm.

4. Unwinder according to claim 3, wherein the accommodation elements have a length of 9.5 mm.

5. Unwinder according to claim 3, wherein the width of the arc-shaped projections amounts to 9.5 mm.

6. Unwinder according to claim 3, wherein the disk and/or the first crosspiece and/or a first accommodation element of the accommodation elements are releasably connected with one another.

7. Unwinder according to claim 1, wherein the diameter of the accommodation elements amounts to 35 mm.

8. Unwinder according to claim 1, wherein the distance between an edge of the disk and an arc-shaped projection of the arc-shaped projections amounts to 10 mm.

Description

(1) In the following, the invention will be explained in greater detail, using the drawings. These show, in a schematic representation:

(2) FIGS. 1a and 1b a top view and side view of the unwinder according to the invention,

(3) FIG. 2 in a perspective view, a detail from the housing interior, in which the accommodation element according to the invention is disposed, and

(4) FIG. 3 the process of pushing or pulling the accommodation element from FIG. 2 onto a crosspiece.

(5) FIG. 1a, 1b show an unwinder provided with the reference symbol 1.

(6) The unwinder 1 has a housing 2 that is provided with a releasable cover 4 on the top side. The housing 2, produced from plastic, is dimensioned in such a manner that even larger rolls 3 can be laid around the accommodation element 9 with their winding core, so as to rotate. The housing 2 has a length of approximately 340 mm, a width of approximately 840 mm, and a height of approximately 700 mm, and is so wide that it reaches beyond the two face sides of the roll 3.

(7) On its front side, the housing 2 has a cutting apparatus 5 in the form of a blade, and a hinged lid 6. The film on the roll 3 that is laid into the housing 2 is pulled out of the housing 2, as needed, in order to be separated from the roll 3 by means of the cutting apparatus 5. In this connection, the hinged lid 6 is pressed down, in order to allow a clean cut of the film rolled up on the roll 3.

(8) As is furthermore evident from FIG. 1a, 1b, a disk 7, produced from plastic and connected with the face sides 13, is disposed in the interior of the housing 2, on the two face sides 13, which disk is in one piece and connected, in its center, with a crosspiece 10 that extends into the interior of the housing 2. The crosspiece 10 has a length of approximately 15 mm and is releasably or non-releasably connected with the accommodation element 9.

(9) The surface sections of the accommodation element 9 corresponding to the crosspiece 10, which are shown in FIGS. 2 and 3 and provided with the reference symbol 14, enclose the crosspiece 10.

(10) The accommodation element 9 shown in FIG. 1a, 1b has outer surfaces that form accommodation surfaces 15 for the film wound up onto the roll 3, at least in part. The accommodation element 9 has a length of approximately 9.5 mm and a diameter of approximately 35 mm, so that even the roll 3, having a larger winding core, is securely held between the two accommodation elements 9. The accommodation elements 9 are consequently dimensioned in such a manner that they adapt more flexibly and also better to a greater width of the roll 3, so that unwinding and cutting of the film is improved.

(11) As is evident from FIG. 2, which shows a detail of the interior 8 of the housing 2, the accommodation element 9 can have arc-shaped projections 12—similar to a paddle wheel—within the scope of a further embodiment of the unwinder 1 according to the invention. Surfaces of the projections 12 having a convex configuration form the accommodation surfaces 15 for the roll 3 shown in FIG. 1a, 1b.

(12) The projections 12 shown in FIG. 2 are produced from plastic and have a certain elasticity, so that even rolls having winding cores that have slightly different diameters can be accommodated by the accommodation element 9 and thereby held in place. As is furthermore evident from FIG. 2, the end region of the crosspiece 10 that faces away from the disk 7 projects freely for a certain distance. In the embodiment of the unwinder 1 shown in FIG. 2, the crosspiece 10 is sheathed by the accommodation element 9 and firmly connected with it.

(13) A further embodiment of the unwinder 1 provides, as illustrated by FIG. 3, that the accommodation element 9 is releasably connected with the crosspiece 10. Application of the accommodation element 9 takes place in such a manner that the accommodation element 9 is pushed onto the outer surfaces 11 of the crosspiece 10 by means of an axial relative displacement, i.e. a displacement in the direction of the arrows shown in FIG. 3, so that the surface sections 14 and outer surfaces 11 that correspond to one another come to lie against one another. Therefore a retrofitting set that consists of the accommodation element 9 is also available for conventional unwinders.

(14) The present invention is not restricted, in terms of its embodiment, to the exemplary embodiments indicated above. Instead, a number of variants is possible, which make use of the solution presented even for embodiments of a fundamentally different type. For example, the accommodation surfaces of the accommodation elements 9 can have geometries different from the ones shown in the above exemplary embodiments.

REFERENCE SYMBOL LIST

(15) 1 unwinder 2 housing 3 rolls 4 cover 5 cutting apparatus 6 hinged lid 7 disk 8 interior 9 accommodation element 10 crosspiece 11 outer surface 12 projections 13 face sides 14 surface sections 15 accommodation surfaces