CH652700A5 - ROLLER DEVICE FOR ROLLS, ESPECIALLY FOR ROLLS MADE OF PAPER OR WAD-LIKE MATERIAL. - Google Patents

Description

The invention relates to a rolling device for rolls, in particular for rolls made of paper or cotton-like material, according to the preamble of claim 1.

Such unwinding devices find e.g. for so-called «kitchen rolls» use. The use can be divided into two processes, namely a rolling process and a tear-off process. While the lowest possible resistance should be opposed to the unrolling, the highest possible resistance is desired when the material is torn off, so that the tearing process can be carried out cleanly without the material being additionally unrolled.

In known rolling devices of the present type, the roller axis is arranged in a stationary manner. These rolling devices either have a low rolling resistance, so that the tear-off process can often only be carried out jerkily or by holding the roll with your second hand, or the rolling resistance is so high that the tear-off process can be carried out properly, but when you roll it off high resistance occurs.

The object of the present invention is to eliminate the shortcomings of the known unrolling devices and to provide a unwinding device of the type mentioned in the preamble of claim 1, which enables an optimal unrolling and tearing process.

This object is achieved in a rolling device of the type mentioned in the preamble of claim 1 according to the invention by the features of the characterizing part of claim 1. By mounting the axis according to the invention on an inclined plane, e.g. the axis slips in two corresponding slots or grooves in the side parts when rolling material is removed, i.e. So with decreasing roll diameter, on the inclined plane at an angle downwards and thereby always remains in contact with the rear wall. When the material web is pulled horizontally from the roll, the axis tends to roll upwards on the inclined plane, which eliminates the contact between the roll and the rear wall and thus provides extremely low rolling resistance.

If you pull the material web vertically or diagonally downwards to tear off the material web from the roll, the axis slides together with the roller on the inclined plane in the direction of the rear wall of the unwinding device, the roller with the rear wall and any additional bottom wall in Touch comes. This contact between the roller and the rear wall or the optionally additionally present bottom wall creates considerable frictional resistance, which prevents it from rolling off during the tear-off process. This resistance can be increased or decreased by the design of the surface of the rear wall or the bottom wall.

According to an advantageous embodiment of the unwinding device according to the invention, a second axis is provided which, above the roller, has its outer circumference in the same device as the axis for receiving the roller, i. So is stored on the same inclined plane or in the same slots and runs after the first axis or the roller. During the tear-off process, i.e. when pulling vertically or diagonally downwards on the material web, the second axis is clamped between the roll and the running material web. This creates additional frictional resistances, so that e.g. tearing also occurs if the perforation of the material web is poorer.

The invention results from the following description of exemplary embodiments in conjunction with the drawing. In it show:

Fig. 1 is a schematic side view of the unwinding device according to the invention

2 and 3 views according to FIG. 1 during the rolling process and during the tear-off process,

Fig. 4 is a schematic side view of an embodiment of the rolling device and supplemented by a bottom wall

5 and 6 are schematic side views of a rolling device supplemented by a second axis.

Fig. 1 shows schematically a side view of a rolling device. This consists of a rear wall 1 and two side parts 2 (of which only a part is of course visible in the side view). In the side parts 2 there are sloping slots 3 forming an inclined plane, in which an axis 4 for receiving a roll 5 of paper or cotton-like material is mounted. The slots 3 have e.g. an opening 7 oriented upwards or obliquely towards the rear wall 1.

The slot course shown ensures that the axis 4 moves away from the opening 7 of the slot 3 when the roll, the diameter of which is decreasing, and always remains in contact with the rear wall 1.

2, the rolling device is shown during the rolling process. The material web to be removed is pulled off horizontally (in the direction of the arrow). Here, the axis 4 and thus also the roller 5 move away from the rear wall 1, which enables an easier rolling process. The vertical upper course of the slots 3 with the opening 7 enables the axis 4 or the roller 5 to be exchanged easily and prevents the axis 4 from unintentionally escaping from the slots 3 during the rolling process. In FIG. 3 the rolling device is shown during the tear-off process. The material web to be removed from the roll 5 is pulled vertically or obliquely downward (in the direction of the arrow) and torn off transversely to the material web by a tear-off movement. The pulling direction (in the direction of the arrow) of the material web causes the roller 5 to be pressed against the rear wall 1, which creates a considerable frictional resistance which enables an effective tearing process without disruptive unrolling during the tearing process.

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The embodiment of the rolling device shown in FIG. 4 has a bottom wall 6 in addition to the aforementioned elements. If the material web is pulled off the roll 5, as described in relation to FIG. 3, the roll 5 is also pressed against the bottom wall 6. There is therefore another friction surface, which increases the frictional resistance required for the tear-off process.

In the embodiment shown in FIG. 5, a second axis 8 is provided, which is also mounted in the slots 3. The web of material coming from the roll 5 is guided over this second axis 8. During the horizontal rolling process (see FIG. 2), the axis 8 is loose

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on the roller 5 and therefore has no influence on the rolling process. During the tear-off process, the axis 8 is pressed against the roller 5 as a result of the pulling direction of the material web which now runs vertically or obliquely downwards. As a result, the resistance to rolling during the tear-off process is increased again, so that the tear-off process even under otherwise less than optimal conditions, e.g. incorrectly executed perforations of the material web, can be optimal, xo Of course, the different embodiments can be combined with each other, e.g. both the bottom wall and the second axis are used in a rolling device.

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2 sheets of drawings

Claims (5)

652 700 PATENT CLAIMS 1. Rolling device for rolls, in particular for rolls made of paper or cotton-like material, consisting of a rear wall, two side parts and an axis arranged between the side parts and mounted in the side parts, characterized in that the axis (4) on an obliquely downward to the rear wall (1) extending inclined plane. 2. Roll-off device according to claim 1, characterized in that the axis (4) is mounted in slots (3) which run obliquely downward towards the rear wall (1) and are formed in the side parts (2). 3. Unwind device according to claim 1 or 2, characterized in that the inclined plane or the slots (3) have an inclination of 45 ° with respect to the horizontal. 4. Roll-off device according to one of claims 1 to 3, characterized by a bottom wall (6) arranged between the side parts (2). 5. Unwind device according to one of claims 1 to 4, characterized by a second axis (8) which is mounted above the axis (4) for receiving the roller (5) in the same device (3) as this.