DE4204168C2 - Winding core for information carriers - Google Patents

Abstract

The invention describes a flangeless winding core, consisting of outer ring, inner ring and S-shaped elastic intermediate elements distributed in the circumferential direction according to the German application DE 4105604 A1, the arrangement of the to achieve a particularly uniform and as little impact on the inner ring compression when winding with tape Intermediate elements was improved as follows. DOLLAR A a) The middle part running in the circumferential direction is arranged alternately against the vertical by the same angle alpha, whereby alpha lies in the range of 90 ° + - 15 ° (alpha NOTEQUAL 90 °). DOLLAR A b) The S-shaped webs are seen in the circumferential direction, each arranged in mirror image to each other.

Description

The invention relates to a flangeless stackable wic core for coiled ribbon-shaped information carriers, wherein the width of the winding surface of the winding core is the same or is slightly larger than the width of the wake up keling information carrier and the winding core a contains central bore and from several concentric Zones exist, which by elastically deformable in radia ler and circumferential intermediate elements are interconnected.

EP 0 375 322 A2 describes a winding core consisting of essentially of an inner and an outer ring where for the two rings by means of evenly over the circumference distributed, oblique ribs are connected. Un The ribs change under the influence of the winding pressure Angular position and there is a rotation of the inner ring counterclockwise and those acting on the inner ring Compression forces should therefore be at a tolerable level be reduced.

P 41 05 604 of the applicant describes in Fig. 3 a Wic kelkern, for wound band-shaped information carriers, wherein the width of the winding surface of the winding core is equal to or slightly larger than the width of the information carrier to be wound, the winding core at a central bore and drive grooves its inner order contains and consists of several concentric zones, which are connected to one another by elastically deformable in the radial and in the circumferential direction evenly distributed intermediate elements, the outer ring having a double-T profile and the elastic intermediate elements in radial and are circumferential S-shaped webs.

The advantage of this arrangement is that when winding the core according to the invention, the winding pressure is distributed evenly over the intermediate elements without the outer ring rotating against the inner ring and that the diameter D _{i of} the inner bore changes less than when State of the art. The usual reinforcement of the plastic material of the core by glass fiber or the like can be dispensed with. As can be seen from Table 1, Examples 1 and 2 of P 41 05 604, there is a compression ratio ΔD _i / ΔD _a = 1: 5 for the parameters mentioned, where ΔD _{i is} the compression of the inner core diameter and ΔD _{a is} the compression of the outer core diameter with wound core means.

Further investigations on the winding cores, however, showed that the compression of the inner diameter D _i was not always sufficient under unfavorable conditions and that the compression of the outer ring or the change ΔD _a along the circumference of the outer ring was uneven.

Based on the prior art mentioned, the task was to create a winding core of the aforementioned generic type, which has a particularly low compression of the inner diameter D _i as well as a particularly uniform compression of the outer ring during winding, that is to say a uniform change ΔD _a along the circumference of the outer ring.

According to the invention the object was achieved with a winding core, either

• a) the middle part of the circumferential direction S-shaped bars against the radius beam are not vertically, but by the same amount α, α 'age are arranged nierend, whereby α = 90 ° - Δα and α '= 90 ° + Δα are (0 ° < Δα <90 °, preferably 5 ° ≦ Δα ≦ 15 °)

or

• a) the S-shaped webs on the outer ring or in NEN RING are so anchored that both rings because two anchoring points of two neighboring ones Bridges follow one another.

In the following the invention is based on the drawings ago explained and shows

Fig. 1 in case a) described above

Fig. 2 shows the case shown above b)

Referring to FIG. 1, the central part (3, 3 ') of the S-shaped webs (7) connecting the outer ring (1) with the inner ring (2) of the winding core against the radial line (6) by the angle α, α 'inclined, the angle alternating in the circumferential direction alternating by the same amount. For example, the angle α, α 'is 75 °, 105 °, 75 °, 105 ° and so on. The deviation from the vertical is preferably between 5 ° and 15 °.

Another development according to the invention is shown in FIG. 2. In contrast to the arrangement according to FIG. 1, the middle part 3 of the S-shaped webs ( 7 , 7 ') which runs in the circumferential direction is always arranged perpendicular to the radiating beam, but they are radially extending connecting pieces ( 4 , 4 ') of the webs ( 7 , 7 ') which are connected to the outer ring ( 1 ) and the corresponding connecting pieces ( 5 , 5 ') which are connected to the inner ring ( 2 ), so arranged that in the circumferential direction each two connection points on the same ring follow one another, or in other words that two S-shaped elastic webs ( 7 , 7 ') are mirror images of one another and follow one another.

The prerequisite for the two arrangements shown is that an even number of S-shaped twos ribs present in the winding core according to the invention is.

Claims (3)

1. Flangeless stackable winding core for wound band-shaped information carriers, wherein the width of the winding surface of the winding core is equal to or slightly larger than the width of the information carrier to be wound, the winding core containing a central bore and driving grooves on its inner circumference and from several concentric zones exists, which are connected by elastically deformable in the radial and circumferentially extending evenly distributed inter mediate elements, the outer ring has a double T-profile and the elastic intermediate elements are radial and in circumferential direction S-shaped webs, characterized in that the part ( 3 , 3 ') of the webs ( 7 , 7 ') running in the circumferential direction is alternately arranged at the same angle α, α 'against the vertical, α = 90 ° - Δα and α' = 90 ° + Δα (0 ° <Δα <90 °) and being an even number of webs is present. 2. Flangeless stackable winding core according to claim 1, characterized in that 5 ° ≦ Δα ≦ 15 °. 3. Flangeless stackable winding core for wound band-shaped information carriers, wherein the width of the winding surface of the winding core is equal to or slightly larger than the width of the information carrier to be wound, the winding core containing a central bore and drive grooves on its inner circumference and from several concentric zones exists, which are connected by elastically deformable in the radial and circumferentially extending evenly distributed inter mediate elements, the outer ring has a double T-profile and the elastic intermediate elements are radial and in circumferential direction S-shaped webs, characterized in that the radial parts ( 4 , 4 ', 5 , 5 ') of the S-shaped intermediate elements ( 7 , 7 ') are connected to the outer ring ( 1 ) or the inner ring ( 2 ) such that two connecting pieces each follow each other in the circumferential direction on the same ring and where in total there is an even number of webs ( 7 , 7 ').