The present invention relates to a roller storage system for sheet-type media.
Roller storage systems for sheet-type media are used for storing banknotes, for example, in automated teller machines, cash register systems or other money processing systems. The roller storage systems consist of a winding drum and at least one film drum that are mounted to the side walls of a housing, free to rotate about an axis of rotation. To fill the roller storage system, the sheet-type media, in this case the banknotes, are wound in succession onto the winding drum between the winding layers with one or two films. To dispense the sheet-type media, the film is unwound from the winding drum and wound up again on the film drum. As this is done, the sheet-type media stored between the film layers are released again.
The problem with the generic roller storage systems is that as the result of lateral shocks in the direction of the axis of rotation of the winding drum against the roller storage system, or against the side walls of the housing in which the roller storage system is suspended, the note spool can slip on the winding drum, with the consequence that the banknotes can no longer be dispensed smoothly, and/or the sheet-type media can no longer be released smoothly from the winding drum.
The object of the present invention is, therefore, to prepare a roller storage system for sheet-type media that is insensitive to impacts of this kind in the axial direction of the winding drum.
In accordance with the invention, the roller storage system has a winding drum that is carried floating on a central drive spindle driveable by a motor. As a result of the floating ride, impacts in the direction of this axis of rotation which is configured as a drive spindle can be absorbed, whereby slippage of the note spool resulting from such lateral impacts can be effectively prevented.
In accordance with one variant of the embodiment, the winding drum is coupled to the drive spindle by at least one spring element disposed on the drive spindle. Lateral shocks can be absorbed by the spring element so that the force exerted on the winding drum by the impact is absorbed by the spring element, and a slipping movement of the spool wound onto the winding drum is thereby prevented.
In accordance with a further variant of the embodiment, stops are disposed on the drive spindle fixed in place to position the spring element or elements. The stops are preferably positioned in such a way that, in the relaxed state, the spring element, or elements, keep the winding roller in a centered position on the drive spindle. Using a design of this type, the winding drum can be securely mounted in a housing without the possibility that lateral impacts in the direction of the drive spindle might result in slippage of the spool wound on the winding drum.
In accordance with a further variant of the embodiment, the roller storage system has at least one damping device that acts cooperatively with the winding drum and counteracts an axial motion of said drum. With the use of a damping device of this kind, the energy imparted by the lateral shocks is converted into frictional heat and is thus no longer available to be converted into kinetic energy, meaning acceleration of the film spool or the winding drum respectively.
In a preferred variant of the embodiment, the damping device is configured as a braking element acting cooperatively with the circumferential surface of the drive spindle of the winding drum. The time period for the winding drum to regain its original center position is thereby substantially reduced.
In a further variant of the embodiment, the motor for the film drum and/or the motor for the winding drum in the roller storage system is connected by way of a hysteresis coupling to the drive spindle of the winding drum, or to a drive spindle of the film drum respectively. A tensile force is generated in the film by such a hysteresis coupling, said film being attached in its turn to the winding drum and in this way similarly providing damping of a lateral impact.
Hereinafter embodiments are explained in greater detail using the appended drawings.
In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc. refer solely to the representation and position of the roller storage system and other parts selected as examples in the respective figures. These terms are not to be construed as restrictive, that is to say, these references may change as the result of different operating positions, or the mirror-symmetrical layout, or similar.
In
As can be clearly seen in
In order to keep winding drum 4 in a centered neutral position, winding drum 4 is provided with a tubular recess 24 in the interior of the circumferential surface through which drive spindle 8 passes, wherein the end faces of this section of tube 24 are configured as axial fixed stops 22, 23 which inner annular discs 19, 20 abut when winding drum 4 is in the centered neutral position. As shown in
In the representations shown in
As a result of the disposition of brake element 21 during the displacement of winding drum 4 on drive spindle 8, additional friction is created so that the neutral position is reached more quickly after the deflection resulting from an impact, meaning that winding drum 4 is resting in its neutral position again.
Alternatively, or additionally, as shown in
The measure of damping effected by hysteresis coupling 12 and/or braking element 21 is dependent on the geometric ratios of winding drum 4 and the film width as well as on the torque of hysteresis coupling 12. It is important that the total of the damping acting in an axial direction and the filtering force lies as closely as possible below a force that causes the media spool 11, consisting of film 5 and the sheet-type media stored therein, to slip on winding drum 4 in the axial direction so that the shock from an impact in an axial direction is absorbed by spring elements 15, 17 before media spool 11 begins to slip.
Number | Date | Country | Kind |
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10 2009 026 253.9 | Jul 2009 | DE | national |