EP0148455B1 - Device for aligning a web unwinded from a roll or the like on a guiding or winding element - Google Patents

Abstract

A winding or partitioning strap unwinding from a coil or wound package of printed products as the printed products are unwound is guided through a guide which turns the winding or partitioning strap temporarily through approximately 90 DEG out of its plane of motion. The winding or partitioning strap is guided in the guide at its flat sides and is aligned with a subsequently arranged deflection roll. The winding or partitioning strap runs from the deflection roll over guide rollers and is subsequently taken up or wound upon a take-up roll or bobbin core. Since the winding or partitioning strap is guided in the guide on the flat sides and not on the edges, an alignment of the winding or partitioning strap unwinding from the coil or wound package in a skew direction with the deflection roll is possible without damaging the strap.

Description

The present invention relates to a device for aligning a tape unwound from a roll or the like to a guiding or winding member according to the preamble of claim 1.

From GB-PS 1,068,800 a device of this type is known, in which the tape running out of a supply roll is first guided around a fixedly arranged deflection roll before it passes through the guide, which also rotates out of the tape running plane by about 90 ° and is also stationary. When the tape is unwound from the fixedly arranged supply roll, its diameter decreases, which has the consequence that the running direction of the tape changes from its outlet point from the supply roll to the deflection roll. However, this change in direction does not affect the running direction of the tape running towards the guide only because, as mentioned, the tape is guided over a deflection roller between the supply roll and the guide.

A similar device is known from Japanese Patent Application Laid-Open No. 58-59148 No. 56-156199 (see also Patents Abstracts of Japan, Volume 7, No. 149, (M-225) (1294) of July 30, 1983, page 95) known. In this device, too, the guide formed by two stationary rollers is preceded by a likewise stationary deflection roller, over which the tape runs after being unwound from a supply roll. Appropriate space is required to provide this additional deflecting roller.

The present invention is based on the object of providing a device of the type mentioned which, with a simple and space-saving design while protecting the tape, permits proper guidance and alignment of this tape during the entire unwinding of the tape from the roll.

According to the invention, this object is achieved by the features of the characterizing part of claim 1.

Since the guide can be moved in a direction which is transverse and preferably essentially perpendicular to the tape running direction, the guide can easily follow the changes in this tape running direction which result from the changing diameter of the roll during unwinding. The tape can thus be guided directly from the roll to the guide without prior deflection. This simplifies the tape guide and also allows a compact, space-saving design.

Preferred further developments of the invention form the subject matter of claims 2-7.

Although the device according to the invention is not exclusively suitable, it is particularly suitable for aligning a winding tape, which runs from a printed product roll when the printed product is being unwound, onto a guide or deflection roller.

• Fig. 1 und 2 eine Vorrichtung bekannter Bauart zum Abwickeln eines Wickelbandes und von Druckprodukten von einem Druckproduktewickel in Seitenansicht bzw. in Draufsicht,
• Fig. 3 und 4 in einer den Fig. 1 bzw. 2 entsprechenden Darstellung eine Vorrichtung zum Abwickeln eines Wickelbandes und von Druckprodukten von einem Druckproduktewickel mmit einer erfindungsgemässen Ausrichteinrichtung für das Wickelband in Seitenansicht bzw. in Draufsicht.
• Fig. 5 in gegenüber der Fig. 3 vergrössertem Maßstab einen Schnitt entlang der Linie V - V in Fig. 3, und
• Fig. 6 in gegenüber der Fig. 4 vergrössertem Maßstab eine Draufsicht auf das auf die Umlenk-und Führungsrolle zulaufende Wickelband, wobei im Gegensatz zur Fig. 4 der Wickel nicht dargestellt ist.

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

• 1 and 2 a known type of device for unwinding a winding tape and printed products from a printed product roll in side view and in plan view,
• 3 and 4 in a representation corresponding to FIGS. 1 and 2, respectively, a device for unwinding a winding tape and printed products from a printed product roll mm with an alignment device according to the invention for the winding tape in a side view and in a top view.
• 5 on a larger scale than in FIG. 3, a section along the line V - V in FIG. 3, and
• FIG. 6 shows a plan view, on an enlarged scale compared to FIG. 4, of the winding tape running towards the deflection and guide roller, the winding not being shown in contrast to FIG. 4.

1 and 2, a device for unwinding printed products and a winding tape from a printed product roll is shown in side view and in plan view, which is of a known type and in DE-A-32 36 866 and the corresponding GB-A- 2 107 681 is described in more detail. This device includes a storage unit 1 which has a mobile frame 2 in the manner of a bearing block. The shaft 3 of a cylindrical winding core 4 is rotatably mounted in the frame 2. A brake (not shown), e.g. a shoe brake. The winding core carries a printed product winding which is shown only schematically and is designated by 5. Between the individual winding layers of the winding 5 formed by printed products, a winding tape is wrapped in a known manner, as is described in more detail in the previously mentioned DE-A-32 36 866 and the corresponding GB-A-2 107 681.

The frame 2 furthermore has two arms 6 running at a distance from one another and parallel to one another, of which only one arm is visible in FIG. 1. The shaft 7 of a coil core 8 is rotatably mounted on these arms 6. The shaft 7 is connected via a drive connection 9 to a drive unit 10 consisting of a motor and a transmission. This drive unit 10 rotates the shaft 7 and the coil core 8 in the direction of arrow A. Bearing plates 11 are also attached to the arms 6, only one of which is visible in FIG. 1. A deflection roller 12 and guide rollers 13, 14 and 15 are rotatably mounted in these bearing plates. The deflection roller 12, whose axis of rotation is designated 12 ', has lateral guide webs 12a and 12b (Fig. 2). The flexible winding tape 16 running from the winding 5, which consists of a tensile material, for example plastic, is guided between the guide webs 12a, 12b of the deflecting roller 12 and then runs over the guide rollers 13, 14 and 15 to the spool core 8. Between the winding 5 and the deflection roller 12, the band 16 runs essentially in a plane which corresponds to the plane of the drawing in FIG. 2 and is designated by B.

If the shaft 7 and with it also the spool core 8 are driven by the drive unit 10 in the direction of arrow A, the winding tape 16 and thus also the wound printed products are unwound from the winding 5, as is the case in DE-A-32 mentioned earlier 36 866 and the corresponding GB-A-2 107 681 is explained in more detail. The winding 5 is rotated in the direction of arrow E. The unwound winding tape 16 is wound on the spool core 8.

Since not all turns of the winding tape 16 are exactly aligned within the winding 5, the running direction C of the winding tape 16 running from the winding 5 is not always aligned with the deflection roller 12. This means that the winding tape 16 also runs obliquely onto the deflection roller 12, as is indicated in FIG. 2 by the winding tape shown in dashed lines and designated 16 '. If the winding tape 16 now runs obliquely on the deflection roller 12, which is intended to guide the winding tape 16 with its guide webs 12a and 12b at its edges 17 and 18, it can now happen that the tape 16 in the area due to the action of a guide web 12a, 12b an edge 17 or 18 is bent up and then bent over. In addition, there is a risk of damage to the band 16 in its edge area. Furthermore, it can also happen that the band rises over a guide web 12a, 12b. Because the flexible winding tape 16 does not have a sufficiently high intrinsic stiffness, there is thus a risk of damage or deformation of the winding tape 16 or a malfunction of the process for winding the winding tape 16 on the spool core 8 when the winding tape 16 runs obliquely.

3 to 6, a device is shown in which it is ensured that the winding tape always runs aligned on the deflection roller 12, regardless of the direction in which the winding tape 16 runs from the winding 5.

The device shown in FIGS. 3-6 largely corresponds to the device according to FIGS. 1 and 2, but has an alignment device 19 for the winding tape 16 (FIG. 3) compared to the latter. Corresponding components are identified in FIGS. 3-6 and FIGS. 1 and 2 with the same reference numbers.

As can be seen in particular from FIGS. 3 and 5, the alignment device 19 has a lever 20 which is pivotably mounted in the bearing plates 11. The pivot axis 20a of the lever 20 runs parallel to the axis of rotation 12 'of the deflection roller 12 and approximately parallel to the belt running plane B (see in particular FIG. 6). At its free end, the lever 20 carries a guide 21 for the winding tape 16. As can be seen in particular from FIG. 5, the guide 21 has two rectangular guide plates 22 and 23 which are connected to one another by means of connecting elements 24 and 25. Each of the two connecting elements 24 and 25 is screwed to the two guide plates 22 and 23 _- as is indicated in Fig. 5. The two guide plates 22 and 23 form a guide gap 26 between them, which is delimited by guide surfaces 22a and 23a on the guide plates 22, 23. This guide gap 26 extends approximately at right angles to the running plane B of the winding tape 16 running from the winding 5. For the pivotable mounting of the guide 21, two bearing pins 27 and 28 are screwed onto the lever 20, each of which is screwed into a bore 29 or 30 in the guide plates 22 and 23 engages (Fig. 5). The two journals 27 and 28 define the pivot axis 21a for the guide 21. This pivot axis 21a runs essentially parallel to the pivot axis 20a of the lever 20.

The winding tape 16 running from the winding 5 is passed through the guide gap 26 which, as already mentioned, is approximately at right angles to the tape running plane B. This means that the winding tape is temporarily rotated out of the tape running plane B by the guide 21 and raised. This superscript winding band section is designated by 16a in FIGS. 5 and 6. After passing through the guide 21, the belt 16 then rotates back into its belt running plane B and - as in the known device according to FIGS. 1 and 2 - runs with its lower flat side 16c over the deflection roller 12 and the guide rollers 13, 14 and 15. In the guide 21, the winding tape 16 is guided through the guide surfaces 22a, 23a delimiting the guide gap 26 on its flat sides 16b and 16c. For this reason, the winding tape 16 can also be guided without damage if the winding tape 16 does not run from the winding 5 aligned with the guide 21, but runs obliquely towards the guide 21. 4 and 6 such a winding tape 16 'tapering obliquely towards the guide 21 is shown in dashed lines. 6, the winding tape 16 shown with solid lines does not run towards the guide 21 in an aligned position. Since the guide 21 is aligned with the deflection roller 12 and also remains aligned, it is achieved that the winding tape 16 aligned with the deflection roller 12 runs onto the latter and between them Guide webs 12a and 12b of the deflection roller 12 is passed through without causing damage or bending of the edge parts of the winding tape 16.

As can be seen from FIG. 5, the guide gap 26 is closed off at the top and bottom by the connecting elements 24 and 25. The connecting elements 24 and 25 thus prevent the winding tape section 16a running in the guide gap 26 from migrating out of the guide gap 26.

In the course of the unwinding process, the diameter of the winding 5 becomes smaller and smaller, which means that the section of the winding tape 16 between the deflection roller 12 and the point of detachment from the winding 5 changes its inclination, as is the case in FIG. 3 by the winding tape 16 shown in broken lines is indicated. The guide 21 can now easily follow this change in inclination of the winding tape 16 because of its own pivotability about the axis 21a and the pivotability of the lever 20, as is also shown in broken lines in FIG. 3. (Fig. 3). ^- guide and with this 21 of the lever 20 extending through the in the guide slot 26, the pivoting of the lever 20 in the direction of arrow D and the guide 21 directly through the winding tape 16. As shown in FIG 5, which is Take winding tape section 16a, the upper edge 17 abuts the connecting element 24. An additional mechanism for adjusting the lever 20 and the guide 21 is therefore not necessary.

The guide 21, which serves to temporarily deflect the winding tape 16 out of the tape running plane B and has to guide the winding tape 16 on its flat sides 16b, 16c, can also be designed differently than as shown and described. Instead of rectangular guide plates 22, 23, guide rollers can also be used, for example, which guide the transverse band section 16a with their lateral surfaces and which can be rotatably mounted. It goes without saying that the described alignment of the winding tape 16 on the deflection roller 12 is also possible if, instead of a deflection roller 12 with a horizontal axis of rotation 12 ', one with a vertical axis of rotation is used.

Although the invention has been explained above with reference to a device for aligning a winding tape running from a printed product roll onto a deflection roller, it is also possible in the manner described to lay flat, flexible belts of any kind on a deflection, guide or guide roller or other suitable guide element to align.

Claims (8)

1. - An apparatus for aligning a strap (16) unwound from a roll (5) or the like on a guiding or winding member (12), comprising a guide (21) arranged between the roll (5) and the guiding or winding member (12) and aligned with the latter for guiding the strap (16) in a position rotated out of the plane of motion (B) of the strap, said guide having a guidance gap (26) for the strap (16) and extending substantially at a right angle to the plane of motion (B) of the strap, characterized by the fact that the guide (21) is movable in a direction (D) extending substantially transverse to the plane of motion (B) of the strap.

2. - The apparatus of claim 1, characterized by the fact that the guide (21) is pivotable about an axis (20a) extending substantially parallel to the axis (12') of the guiding or winding member (12).

3. - The apparatus of claim 2, characterized by the fact that the guide (21) is mounted on a lever (20) pivotable about the pivot axis (20a) extending substantially parallel to the plane of motion (B) of the strap, and is preferably rotably journalled on the lever about an axis (21 a) extending parallel to the pivot axis (20a) of the lever (20).

4. - The apparatus of claim 3, characterized by the fact that the pivot axis (20a) of the lever (20) is extending substantially parallel to the axis of rotation (12') of the guiding member (12) constructed as a roll.

5. - The apparatus of any one of claim 1-4, characterized by stop members (24,15) for limiting the motion of the strap (16) within the guidance gap (26) in a direction transverse to the direction of motion (D) of the strap (16) through the guidance gap (26).

6. - The apparatus of any one of claims 1-5, characterized by the fact that the guidance gap (26) is defined by mutually opposite guide surfaces (22a, 23a) guiding the strap (16) at its flat surfaces (16b, 16c).

7. - The apparatus of any of claims 1-6, characterized by the fact that the guide (21) comprises mutually opposite guide bodies (22, 23), e.g. plates or rolls, forming the guidance gap (26).

8. - The use of the apparatus according to any one of claims 1-7 for aligning a winding strap (16) unwinding from a wound package (5) of printed products, with a guidance or deflection roll (12).

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