EP0161569B1 - Device for winding or unwinding continually fed preferably overlapping printed articles - Google Patents

Abstract

The apparatus for unwinding flexible, substantially flat products, especially printed products, wound together with a winding strap into a wound package from such a wound package, comprises a substantially hollow and substantially cylindrical winding core and a support arrangement for rotatably and releasably supporting the winding core constructed as an annular friction wheel. This annular friction wheel is structured for deposition upon and lifting from the support arrangement. The annular friction wheel contains at its inner side a traction surface coaxial with the longitudinal axis of the annular friction wheel. This annular friction wheel also possesses side flanges extending inwardly towards its longitudinal axis for laterally delimiting the traction surface. The support arrangement comprises freely rotatable support wheels and the traction surface bears upon these freely rotatable support wheels. There is also provided a braking member structured for operatively engaging the winding core. The winding core is simple in construction and economical in manufacture.

Description

The present invention relates to a device for winding up or unwinding printed products which occur continuously, preferably in scale formation, together with a winding tape to form a roll or from a roll according to the preamble of claim 1, and a winding core for use in such a device.

It is known to wind up the printed products ejected from a rotary printing machine in scale formation together with a winding tape or a winding tape pair on a winding core (CH-PS 559691, DE-PS 3123888 or the corresponding US-PS 4438618, and DE-OS 3236866 or the corresponding GB-OS 2107681). The finished printed product rolls are then stored in an intermediate storage facility, removed at the appropriate time and fed to a processing station. At this processing station, the printed products are removed from the storage roll by unwinding.

The device known from CH-PS 559691 has a shaft which is driven during the winding-up process, onto which the empty or hollow-cylindrical winding core carrying a winding must be plugged, the inside diameter of which corresponds to the outside diameter of the shaft. Attaching and removing the winding core to or from the shaft is tedious and also requires a certain amount of care. In addition, the winding core must be precisely machined for a good fit on the shaft.

To facilitate transportation, the winding core is provided with side cheeks which are designed as running or rolling rings. However, because of these side walls, the space utilization when storing the empty winding cores is poor. In addition, the manufacture of such winding cores is relatively complex.

The present invention has for its object to provide a device of the type mentioned simple, compact and fault-prone design, in which the coupling or decoupling of the winding core can be done with little time and equipment and easy handling and space-saving storage both the empty and the full winding core is possible.

This object is achieved according to the invention by the features of the characterizing part of claim 1 and of claim 14.

The formation of the winding core as an annular friction wheel of a friction wheel transmission allows the winding core to be placed or lifted quickly onto the support wheels or from the support wheels. Due to the side flanges provided on the winding core, the winding core is automatically centered both when it is placed on the support wheels and during the run. The winding core can be designed simply and have a smaller width than the winding, which is reflected in lower material and manufacturing costs. In addition, a minimum of space is required for the storage of both the empty and the winding cores carrying a winding.

Preferred further developments of the device according to the invention and of the winding core according to the invention form the subject of claims 2-13 and 15-17.

• Fig. 1 in Seitenansicht eine Vorrichtung zum Aufwickeln von Druckprodukten vor Beginn des Aufwickelvorganges,
• Fig. 2 in einer der Fig. 1 entsprechenden Darstellung die für das Aufwickeln bereite Aufwikkelvorrichtung,
• Fig. 3 die Vorrichtung gemäss Fig. 2 in Vorderansicht in Richtung des Pfeiles 111 in Fig. 2,
• Fig. 4 in Vorderansicht eine Vorrichtung zum Abwickeln der Druckprodukte vom Wickel,
• Fig. 5 einen Schnitt etwa entlang der Linie V-V in Fig. 4,
• Fig. 6 in gegenüber der Fig.4 vergrössertem Massstab eine Vorderansicht der Abwickelvorrichtung mit gelöster Bremse, und
• Fig. 7-10 im Längsschnitt verschiedene Ausführungsformen des Wickelkernes.

The invention is explained in more detail below with reference to the drawing. It shows purely schematically:

• 1 is a side view of a device for winding printed products before the start of the winding process,
• 2 in a representation corresponding to FIG. 1, the winding device ready for winding,
• 3 shows the device according to FIG. 2 in a front view in the direction of arrow 111 in FIG. 2,
• 4 is a front view of a device for unwinding the printed products from the roll,
• 5 shows a section approximately along the line VV in FIG. 4,
• Fig. 6 on a larger scale compared to Fig.4, a front view of the unwinder with the brake released, and
• Fig. 7-10 in longitudinal section different embodiments of the winding core.

1-3, a winding station 1 is shown purely schematically for winding printed products resulting in scale formation into a roll. This winding station has two support wheels 2 and 3, which lie opposite one another with respect to a vertical plane designated by A (FIG. 3). These support wheels 2, 3 are designed as friction wheels and, in the present exemplary embodiment, consist of two rollers 4 and 5 coupled together. It is understood that the support wheels 2 and 3 can also consist of only one roller. The support wheels 2, 3 and the rollers 4 and 5 are wedged onto a shaft 6, the longitudinal axis of which is designated 6a. This shaft 6 is rotatably supported in two bearings 7 and 8, which are fastened to a frame, generally designated 9. A chain wheel 10 or 11 is located at the end of the shafts 6 opposite the support wheels 2 or 3. A chain 12 runs over the two chain wheels 10, 11 and is indicated in FIG. 3. This chain 12 is further guided by a tension wheel 13 and a drive wheel 14. The latter is driven by a drive motor 15 via a winder gear 16 and an angular gear 17 (Fig.3). The winder gear 16, which is of a known type, can be, for example, a winder gear as described by P.I.V. Drive Werner Reimers KG is distributed.

The two support wheels 2 and 3 form part of a friction wheel gear 18, which further includes an annular friction wheel 19, which is also a winding core 20, on which the printed products are wound. This winding core 20 has, as can be seen in particular from FIG. an annular web 21, the inner surface of which is designed as a running surface 22. This tread is laterally delimited by side flanges 23 and 24, which are directed inward from the web 21, ie against the longitudinal axis 20a of the winding core 20. 1 shows, these side flanges 23, 24 do not form a right angle with the web 21), but are directed somewhat to the side.

The winding core 20 comes with its tread 22 on the support wheels 2, 3 to the support and is rotated by this. The side flanges 23 and 24 running to the side of the support wheels prevent the winding core 20 running over the support wheels 2 and 3 from migrating sideways.

A guide wheel 25 is arranged below and approximately in the middle between the two support wheels 2, 3, which in the present embodiment also consists of two rollers 26 and 27 coupled to one another. This guide wheel 25 is attached to the end of an arm 28 on which the piston rod 29 of a pneumatic (or possibly hydraulic) cylinder-piston unit 30 engages. This cylinder-piston unit 30 is pivotally mounted in the frame 9 about an axis designated 30a. The arm 28 is further guided in a longitudinally displaceable manner in a guide element 31 (FIGS. 1 and 2) which is attached to the frame 9 so as to be pivotable about an axis 31. Guides 32 and 33 are arranged on both sides of the arm 28. Each of these guides 32, 33 has a sloping guide track 32a (FIGS. 1 and 2) in which a roller 34 attached to the arm 28 is guided. 1 and 2, only one of the two opposite guide rollers 34 is shown.

When the piston rod 29 is retracted, the arm 28 together with the guide wheel 25 is in its raised and rear end position, which is shown in FIG. 1. When the piston rod 29 is extended, the arm 28 together with the guide element 31 is pivoted about the axis 31 a and at the same time is advanced in its longitudinal direction as a result of the guide of the rollers 34 in the guide tracks 32 a. At the end of this feed and pivoting movement, the arm 28 and the guide wheel 25 assume a lower, front end position in which the guide wheel engages in the winding core 20 and is pressed against the running surface 22 of the winding core 20, as is shown in FIG. 2 . Due to the pressure exerted on the winding core 20 by the cylinder-piston unit 30 via the guide wheel 25, the winding core 20 is pressed with a running surface 22 against the support wheels 3 and 3 designed as friction wheels in order to ensure a perfect frictional connection between the support wheels 2, 3 and the winding core 20 . The guide wheel 25 engaging between the side flanges 23 and 24 also serves to hold the winding core in a substantially vertical position.

An empty winding core 20 is placed on the support wheels 2 and 3 with the guide wheel 25 located in its upper, rear end position (FIG. 1). The guide wheel 25 is then moved into its front, lower end position in the manner described (FIG. 2). By driving the support wheels 2 and 3 in the direction of arrow B (Fig. 3), the winding core 20 is now set in rotation. Because of the internal contact of the support wheels 2, 3 with the winding core 20, this also rotates in the direction of arrow B. The winding of the printed products fed to the winding core 20 undershot together with the winding strip indicated in FIG. 3 and denoted by 35 basically takes place on that in the previously described DE-PS 3123888 or the corresponding US-PS 4438618 described manner.

After the winding process has ended, the guide wheel 25 is moved back into its end position shown in FIG. 1, whereupon the winding core 20 together with the winding 36 formed thereon and indicated in FIGS. And 3 is lifted off the support wheels 2, 3 and conveyed away. A new, empty winding core 20 can now be coupled in the manner already described.

FIGS. 4-6 show an unwinding station 37, at which the printed products can be removed from the winding 36 again.

This unwinding station 37 has two support wheels 38, 39 which lie opposite one another with respect to a vertical plane C (FIGS. 4 and 6). In the present case, each of these support wheels 38, 39 is formed by two rollers 40, 41 (FIG. 5) which are coupled to one another and are rotatably mounted on a shaft 42. Each of the two shafts 42, the axis of which is designated 42a, is held eccentrically in two bearing bodies 43 and 44 (see in particular FIG. 5). Each bearing body 43, 44 is rotatably mounted in a bearing plate 46 which is fastened to a frame, generally designated 47.

A brake shoe 48 is arranged below and in the middle between the two support wheels 38, 39 and has a brake pad 49 made of a suitable material on its underside. The brake shoe 48 is attached to a plunger 50 with a rectangular cross-section which extends in the vertical direction, i. H. in the direction of arrow D (Fig. 6) is movable up and down. To guide the plunger 50, guide rollers 51 are provided which rest on the side surfaces of the plunger 50.

To move the plunger 50 together with the brake shoe 48, an actuating mechanism 52 is provided which has two connecting rods 53, 54 engaging on the upper end of the plunger 50. Each of these connecting rods 53, 54 is articulated at its upper end to a pivot lever 55 and 56, respectively. Each pivot lever 55 or 56 is connected in a rotationally fixed manner to the bearing body 43 of the bearing for the shaft 42 of one of the two support wheels 38, 39. A tension spring 58 or 59 acts on a bolt 57, which forms the extension of a hinge pin that connects the connecting rod 53 or 54 to the associated pivot lever 55 or 56 (FIG. 5). The other end of the tension springs 58, 59 is on attached to a bolt 60 which is attached to the frame 47.

6, the brake shoe 48 is shown in its upper rest position. The pivot levers 55, 56 of the actuating mechanism 52 are also in their upper pivot position, in which they are held by the tension spring 58, 59. Since, as already mentioned, the bearing bodies 43 are connected to the pivot levers 55, 56, the bearing bodies 43, 44 and thus also the shafts 42 of the support wheels 38, 39 assume the upper end position shown in FIG. 6.

If, in this upper end position of the shafts 42, the support wheels 38 and 39 are loaded with a winding 36 by fitting a winding core 20, the bearing bodies 43, 44 are rotated in the direction of the arrows because of the eccentric mounting of the shafts 42 in the bearing bodies 43, 44 E (Fig. 6). During this rotary movement, the pivot levers 55 and 56 are taken along while overcoming the force of the tension springs 58, 59 and are pivoted downward beyond a dead center position into a lower end position, which is shown in FIG. The pivoting movement of the levers 55, 56 is transmitted via the connecting rods 53, 54 to the plunger 50 and thus to the brake shoe 58, which is moved downward in the direction of arrow D until the brake shoe 58 with its brake lining 49 on the tread 22 of the Winding core 20 comes into circulation. The braking force which acts on the running surface 22 is thus controlled by the weight of the winding core 20 and above all of the winding 36 and is dependent on the lever ratios of the actuating mechanism 52.

When lifting the winding core 20 from the support wheels 38, 39, the brake shoe 48 is taken up in the direction of arrow D, with the result that the pivot levers 55, 56 while overcoming the force of the tension springs 58,59 upwards into their upper End position can be pivoted. The bearing bodies 43, 44 together with the shaft 42 are taken along, so that the support wheels 38, 39 are also brought back into their upper end position. It is of course also possible to move the brake shoe 48 by hand from its lower active position into the upper rest position.

To unwind the printed products from a winding 36, a winding core 20 carrying such a winding 36 is placed on the support wheels 38, 39. 6 shows the start of this placement process. Under the weight of the bracket 36, the support wheels 38 and 39 are pivoted in the direction of arrow E in the manner already described, which has the consequence that the brake shoe 48 is moved into its lower active position, in which its brake pad 49 against the tread 21 of the Winding core 20 is pressed. Now the printed products can be unwound from the winding 36 in a manner known per se. As explained in detail in the already mentioned DE-PS 3123888 and the corresponding US-PS 4438618, the winding core 20 together with the winding 36 in the direction of the arrow F (FIG ) rotated. The brake shoe 48 acting on the winding core 20 brakes the winding core 20. Since, as already mentioned, the braking force acting on the winding core 20 depends on the weight resting on the support wheels 38, 39, this braking force is greatest when the winding 36 is full and decreases as the winding 36 becomes smaller. In this way, as desired, the braking effect is reduced in the course of the unwinding process, without the need for any special control.

When the empty winding core is lifted after the unwinding process has ended, the brake shoe 48 is moved into its upper rest position, as already mentioned, and the support wheels 38, 39 are also pivoted back into their upper end position.

A wide variety of options are available for the construction of the winding core 20. The embodiment shown in FIG. 7 is simple in construction and accordingly easy and inexpensive to produce. In certain cases, however, more rigid constructions are necessary. Such constructions are now shown in FIGS. 8 and 9.

In the winding core 20 shown in Fig., The web 21 is provided with a circumferential groove or bead 61 which protrudes inwards. A winding core 20 designed in this way is primarily suitable for use with winding and unwinding stations 1, 37 of the type shown in FIGS. 1-6, in which the support wheels 2, 3 and 38, 39 consist of two rollers 4, 5 and 40, 41 exist, which form a gap between them in which the bead 61 comes to rest. In this case, the bead 61 also contributes to guiding the core 20 on the support wheels 2, and 38, 39.

In the embodiment shown in FIG. 9, a stiffening effect is achieved in that the edges 23a, 24a of the projecting side flanges 23 and 24 are bent back, as a result of which a type of flanged edge is formed. In this variant, the running surface 22 of the core 20 remains flat over the entire width, which, like the winding core 20 according to FIG. 1, also allows support wheels 2, 3, 38, 39 to be used with a single roller.

As the figure shows, the winding cores 20 are less wide than the winding 36. In certain cases, especially with very thin products, it may be necessary to make the support for the printed products on the winding core 20 wider. This is possible, for example, as shown in FIG. 10, in that an annular support 62 is attached to the outer side of the web 21 of the winding core 20 and protrudes laterally beyond the web 21. Without the annular web 21 and thus also without having to make the tread 22 wider, it can be achieved in this way that the printed products can be supported in the wrap 36 over a larger area.

The design of the drive for the winding core 20 during the winding process as a friction gear has many advantages. Thus, the winding core 20 can be formed as an annular friction wheel which can be for coupling and uncoupling to and from _'the winding station 1 without difficulty quickly placed on the supporting wheels 2, 3 or lifted therefrom. Of course, this also applies to the coupling and uncoupling to and from the unwinding station 37. The side flanges 23, 24 which laterally delimit the running surface 22 of the winding core 20 ensure that the winding core 20 is properly guided laterally on the support wheels 2, 3 and 38, 39. Furthermore, these side flanges 23, 24 facilitate the placement of the winding core 20 on the support wheels 2, 3 or 38, 39, since these side flanges 23, 24 ensure automatic centering when the winding core 20 is possibly placed at an angle on the support wheels 2, 3, 38, 39.

Both the winding and the unwinding station 2 and 37 can be of relatively simple construction. In the winding station 21, no complex coupling mechanism for establishing a drive connection between the drive and the winding core 20 is required. No separate devices are required to actuate the brake at the unwinding station and to regulate the braking force, since the weight of the winding is used to actuate the brake.

The winding core 20 is also simple in construction and can therefore be produced in a cost-effective manner. This is important in addition to simple handling, since a very large number of such winding cores 20 are required in a printing company. However, the procurement and storage of these winding cores should be as inexpensive as possible. The fact that the empty winding cores 20 can be stored in a small space also contributes to this. Little space is also required for the intermediate storage of the full winding cores 20, since the winding core 20 is, as already mentioned, less wide than the winding 36 or at most the same width as this, i.e. because the winding core 20 does not protrude laterally beyond the winding 36.

Claims (17)

1. An apparatus for winding or unwinding printed products arriving continuously, preferably in overlapping formation, together with a winding strip, into a roll or from a roll, having a hollow cylindrical winding core which can be driven during the winding operation, and a bearing arrangement for the rotatable and removable mounting of the winding core, characterised in that the winding core (20) is constructed in the form of an annular friction wheel (19) of a friction gear (18), which friction wheel can be lifted off the bearing arrangement (2, 3; 38, 39) or placed on the latter and comprises, at its inner side, a running surface (22) which is coaxial with its longitudinal axis (20a) and is bounded by lateral flanges (23, 24) directed inwards towards the longitudinal axis (20a) and which comes to rest on rotatable supporting wheels (2, 3; 38, 39) of the bearing arrangement, which wheels are driven during the winding operation and form friction wheels of the friction gear (18).

2. An apparatus according to claim 1, characterised in that the winding core (20) comprises an annular web (21), the inner peripheral surface of which forms the running surface (22) and from which the lateral flanges (23, 24) project inwards.

3. An apparatus according to claim 1 or 2, characterised in that two supporting wheels (2, 3; 38, 39) are provided, which are situated opposite one another with respect to a vertical plane (A, C) and the axes (6a, 42a) of which extend substantially parallel to this vertical plane (A, C).

4. An apparatus according to claim 3, characterised in that the two supporting wheels (2, 3) are connected to a common driving device (15, 16,17) comprising a winder gear unit (16).

5. An apparatus according to claim 3 or 4, characterised in that disposed below the supporting wheels (2, 3) which can be driven is a rotatably mounted guide wheel (25) which can be placed on the running surface (22) of the winding core (20) and removed from the running surface (22).

6. An apparatus according to claim 5, characterised in that the guide wheel (25) is secured to a pivotally mounted arm (28) on which there acts a drive (30) preferably formed by a piston-cylinder unit.

7. An apparatus according to claim 6, characterised in that the arm (28) is displaceable in its longitudinal direction and is guided by a guide (32, 33) which, on pivoting of the arm (28), causes a longitudinal displacement thereof.

8. An apparatus according to claim 3, characterised in that the supporting wheels (38, 39) are mounted for free rotation and that a brake member (48) is provided which can be brought to act on the winding core (20).

9. An apparatus according to claim 8, characterised in that the brake member (48), which is preferably disposed below the supporting wheels (38, 39) can be applied against the running surface (22) of the winding core (20) and removed from this running surface (22) by means of an actuating mechanism (52).

10. An apparatus according to claim 9, characterised in that the brake member (48) can be brought into its active position or position of rest respectively when the winding core (20) is placed on or removed from the supporting wheels (38, 39).

11. An apparatus according to claim 10, characterised in that the supporting wheels (38, 39) are mounted for movement between an unloaded and a loaded position and are coupled to the actuating mechanism (52) in such a manner that the latter brings the brake member (48) to bear against the running surface (22) of the winding core (20) when the supporting wheels (38, 39) are loaded.

12. An apparatus according to claim 11, characterised in that each supporting wheel (38, 39) is held eccentrically in a rotatably mounted bearing member (43, 44) which is connected to the actuating mechanism (52) so that, on a rotation of the bearing members (43, 44) effected when the supporting wheels (38, 39) are loaded, the brake member (48) is brought into its active position.

13. An apparatus according to claim 12, characterised in that connected to each bearing member (43, 44) is a pivoted lever (55, 56) which is in communication with the brake member (48), guided for longitudinal displacement, to raise and lower the latter.

14. A hollow cylindrical winding core for use in an apparatus according to any one of claims 1 to 13, which is constructed in the form of an annular friction wheel (19) of a friction gear (18) and comprises, at its inner side, at least one running surface (22) which is coaxial with its longitudinal axis (20a) and is bounded laterally by lateral flanges (23, 24) directed inwards towards the longitudinal axis (20a), characterised by an annular web (21), the inner peripheral surface of which forms the running surface (22) and from which the lateral flanges (23, 24) project inwardly and bound it laterally.

15. A winding core according to claim 14, characterised in that the web (21) is provided with a bead (61) extending all round it.

16. A winding core according to claim 14, characterised in that the edges (23a, 24a) of the lateral flanges (23, 24) are bent back.

17. A winding core according to claim 14, characterised in that an annular support (62), projecting laterally beyond the web (21) is provided for the products at the outer side of the web (21).

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