EP0965551A2 - Apparatus for folding printed or paper products - Google Patents

Abstract

The assembly to fold printed paper, and other paper materials, has two continuous conveyor belts (5,6) moving in the same direction between end deflection rollers (16,19). The belts have one level moving in the advance direction, with the other level moving in the reverse direction. A number of shaping rollers (9) are in a line, in succession, at the first section (a) of the advance belt level. On an axial section, the rollers (9) have a V-shaped convex peripheral surface, with a decreasing leg angle from roller to roller in the advance direction. A number of press rollers (8,11,13) are at the side of each conveyor belt away from the shaping rollers (9), to press the belts against the rollers on both sides of the legs in the first section (a) of the belts, and against each other in the second section (b). The press rollers (13) are in a pair at the conveyors belts (5,6) at the second section (b), on parallel axes. The roller (13) axes are rotated progressively round the feed direction from pair to pair. Each pair of press rollers (13) is mounted to a carrier, with an adjustable rotation round a center point between the rollers (13). Additional sliding guides are at the conveyor belts for the paper products, such as rails, standing belts, and the like. The conveyor belts (5,6) pass round a common end roller (19) at the end of the first section (a). The first press rollers (8) of the first section, and the final press rollers (13) of the second section (b) rotate on horizontal axes. An additional conveyor (3) feeds the paper material into the entry gap (7) between the first shaping roller (9) and the first section (a) of the conveyor belt level. Vibrating belts are over it, and to the sides, to give a side guiding action to the paper. Units to give a sliding and overlapping movement to the paper are before and/or after the conveyor belt assembly, using accelerated or decelerated movements to the paper, for positioning.

Description

The present invention relates to a device for Folding printed or paper products, with two neighboring ones co-rotating conveyor belts circulating between end rollers and a conveyor run running in the direction of conveyance and one have a return run running in the reverse direction.

In known devices of this type, the horizontal Printed products by means of round belts, which are between upstream vertical and downstream horizontal pulleys are forced down. The fold back is with a series of pairs of rollers with horizontal axes. A stacking device is described below.

A construction is known from US Pat. No. 4,795,416 which as a folding rail is the side edge of one of the conveyor belts serves itself. Another construction is known from US Pat. No. 4,747,817 known, in which the folding around an extreme narrow lower conveyor belt is carried out, etc. under guidance of the side wings of the printed product between resting tensioned nylon wires.

The invention is an extension and improvement of Devices described above. The task lies with her Reason, the products better during folding and turning keep more accurate, and therefore higher working speeds too allow. Furthermore, the option of a horizontal levy should after folding a multi-layered further processing with Standard devices are made possible.

This object is achieved with a device for folding printed or paper products, which is characterized according to the invention by a plurality of form rollers which follow one another in a line and lie opposite a first section of the conveying strands and have an approximately V-shaped convex peripheral surface with an axial section have decreasing apex angle in the conveying direction from roll to roll, and
a plurality of pressure rollers which bear against the side of each conveyor strand facing away from the roller and press the conveyor strands against the top of the rollers on both sides of the top and against each other in a subsequent second section.

According to the invention for folding and turning the products two continuous conveyor belts are provided, which the Keep products safe. The conveyor belts press during the folding process the products on the left and right are becoming increasingly pointed Roll. The contact pressure is generated using pairs of rollers, whose axes are inclined. This arrangement of roles results a better and more precise hold than between pairs of rollers horizontal axes.

A particularly advantageous embodiment of the invention is characterized in that two each on one and on other conveyor belt adjacent, forming a pair of pressure rollers have mutually parallel axes in said second section, with the axes of successive pairs of pairs too Pair are progressively rotated around the conveying direction. Thereby the folded products can easily move in that direction rotated or turned over, which for further processing is required, e.g. for stacking devices such as Stacker or the like

It is particularly advantageous if according to another Feature of the invention each pressure roller pair on one Carrier is mounted, which in a rotational movement, their Midpoint between the pressure rollers, adjustable is. This enables easy adjustment of the rollers.

In any case, it is particularly advantageous if, in addition to the Conveyor belts additionally slide guides, such as rails, standing Bands or the like, for which products run so that even large, Products of outstanding quality are processed on the conveyor belts can.

The conveyor belts preferably run on their in the first section end lying around a common end roll so that only a single drive element is required. Alternatively however, the tapes could also be divided and accordingly multiple drives can be provided. In the event of continuous Conveyor belts became a special form of belt return developed.

According to a particularly advantageous, preferred embodiment have the first pressure rollers of the first section and the last pressure rollers of the second section horizontal Axes on. This makes the device particularly easy easily in connection with standard devices available on the market operate which work with horizontal product flows.

To the products especially when entering the device Aligning precisely is preferred according to another Feature of the invention the feed gap between the first form roller and the first section of the funding dreams another conveyor belt upstream for feeding the feed gap with products, above which laterally vibrating belts for side alignment of the products transported on it are arranged. So that is it is possible to fold exactly at right angles.

Products that are in the form of scales, that is to say they lie on top of one another in a step-like manner, must be pulled apart first. To this purpose is according to another feature of the invention provided that the device with a singling conveyor rolls running faster and faster in the conveying direction or Conveyor belts for the purpose of separating one delivered in a scale Product stream upstream and / or a shed layer with rollers running increasingly slower in the conveying direction or Conveyor belts for the purpose of laying in the form of scales Product stream are / is downstream. While folding the products remain individual, but can be delivered in the form of scales and / or removed. This modular structure makes the invention versatile.

Fig. 1 eine schematische Seitenansicht einer Vorrichtung gemäß der Erfindung,

Fig. 2 eine schematische Draufsicht der beiden Förderbänder, wobei die Bandrückführung besonders gut zu erkennen ist,

Fig. 3 einen Längsschnitt gemäß der Linie 3-3,

Fig. 4 einen Querschnitt gemäß der Linie 4-4 in vergrößertem Maßstab und

Fig. 5 einen Querschnitt gemäß der Linie 5-5 in vergrößertem Maßstab.

In the drawing, an example embodiment of the invention is shown; it is described in more detail below. It shows

1 is a schematic side view of a device according to the invention,

2 shows a schematic top view of the two conveyor belts, the belt return being particularly easy to see,

3 shows a longitudinal section along the line 3-3,

Fig. 4 shows a cross section along the line 4-4 on an enlarged scale and

Fig. 5 shows a cross section along the line 5-5 on an enlarged scale.

1 to 3 are printed or paper products 1st the device one after the other horizontally by means of a no closer supplied conveyor (conveying direction see arrow 2). Products 1 arrive on a first conveyor belt 3, above which laterally vibrating bands 4 are arranged are which exactly align the products 1 in the lateral direction.

The conveyor belt 3 guides the products 1 to a feed nip 7 to which between conveyor belts 5, 6 on the one hand and the first a plurality of form rollers 9 on the other hand is.

The conveyor belts 5, 6 run in a first section a gradually from a horizontal starting direction to one vertical direction, and in a second section b from the vertical direction using the conveyor belt 5 around 90 ° in the horizontal direction, however, with further use the conveyor belt 6 by a further 90 ° into a position turned by 180 °, in a ultimately horizontal, but one above the other Arrangement.

Each conveyor belt 5, 6 has one running in the conveying direction Conveyor run and a return run running in the reverse direction, which are not specifically designated in the drawing.

The form rollers 9, which the conveyor belt of the conveyor belts 5, 6 opposite in the first section a are essentially in a line in a row. One of the middle form rolls 9 is shown in section in FIG. 4.

The first form roller 9 seen in the conveying direction 2 has an essentially plane, i.e. cylindrical peripheral surface 9 ', whereas the subsequent shaping rolls 9 increasingly have more pointed, V-shaped convex peripheral surface 9 ', as in FIG Fig. 4 can be seen. In other words, the angle 10 in the apex 9 "of the peripheral surface 9 'from roll to roll in the conveying direction 2 from. The last form roll 9 of section a is very small.

On the sides of the conveying strands facing away from the form rollers 9 of the conveyor belts 5, 6 are pressure rollers 8, 11 in section a arranged, which the conveyor dreams against the form rollers 9 on both sides press their apex 9 "(Fig. 4). In the second section b further pressure rollers 13 are provided, which are now there no form rollers 9 are present, the two funding dreams Press conveyor belts 5, 6 towards each other, the folded product 1 is in between. This situation is in the Section shown in Fig. 5.

The pressure rollers 13 in section b are thus in pairs arranged, and each pair 13, 13 is opposite to the vertical rotated by a larger angle 14 (Fig. 5) than the previous one Pair. As a result, the folded products 1 into one suitable position rotated for further processing, in the illustrated Fall into the horizontal position.

For easy adjustment of the inclined position of each pair of pressure rollers 13, 13 in section b, each pair is on a support 12 stored, which is in a rotational movement, its center has between the pressure rollers 13, is adjustable. For this purpose, the carrier 12 has a curved slot 12 ' in which a locking screw 15 engages, which in one Not shown frame of the device mounted is.

The conveyor belts 5, 6 run on their in the first section a lying end around a common end roller 19, and its end at the end of section b by separate, end rolls 16 one above the other 16. Press the end rolls 16 again the fold of the folded product 1 when leaving the Device and also serve as drive rollers. The Products 1 leave the device folded and horizontal Location.

During the entire folding and turning process, the Products 1 additionally between on the sides of the product edges extending sliding guides 18, such as rails, standing belts and the like guided. This is particularly the case with large, unstable products important (see Fig. 3).

In Fig. 2 is the return of the return run of the conveyor belts 5, 6 shown. After the deflection around the end roller 16 the return run of the conveyor belt 5 simply becomes the end roll 19 returned. The return run of the conveyor belt 6, however, must can still be turned by a roll 20 by 180 ° before it is turned same end roller 19 can reach. The end roller 19 also becomes Tensioning the conveyor belts 5, 6 used.

The invention is not based on the illustrated embodiment limited, but includes all embodiments that fall within the scope of the attached claims.

Claims (8)

Device for folding printed or paper products, with two adjacent co-rotating conveyor belts, which rotate between end rollers and each have a conveyor strand running in the conveying direction and a return strand running in the reverse direction, characterized by a plurality of form rollers (9) which follow one another in a line and lie opposite a first section (a) of the conveying strands, and a circumferential surface (9 ') which is approximately V-shaped in the axial section (FIG. 4) and has a roller in the conveying direction (2) (9) to vertex (9) decreasing apex angle (10), and a plurality of pressure rollers (8, 11, 13) which bear against the side of each conveying strand facing away from the shaping rollers and the conveying strands in said first section (a) against the shaping rollers (9) on both sides of their apex (9 ") and in a subsequent second section (b) press against each other. Device according to claim 1, characterized in that two each on one and on the other conveyor belt (5, 6) adjacent, a pair of pressure rollers (13) in the above second section (b) have axes parallel to one another, the axes of successive pairs (13, 13) of pairs progressively turned in pairs around the conveying direction (2) (14) are. Device according to claim 2, characterized in that each pressure roller pair (13, 13) mounted on a carrier (12) which is in a rotational movement (14) which is its center about between the pressure rollers (13), is adjustable. Device according to one of claims 1 to 3, characterized characterized in that in addition to the conveyor belts (5, 6) Slideways (18), such as rails, standing belts or the like, for the products (1) run. Device according to one of claims 1 to 4, characterized characterized in that the conveyor belts (5, 6) on their in the first Section (a) end lying around a common end roller (19) circulate. Device according to one of claims 1 to 5, characterized characterized in that the first pressure rollers (8) of the first section (a) and the last pressure rollers (13) of the second section (b) have horizontal axes. Device according to one of claims 1 to 6, characterized characterized in that the feed gap (7) between the first form roller (9) and the first section (a) of the funding dreams another Conveyor belt (3) for loading the feed gap with products (1) is arranged above which laterally vibrating bands (4) for the lateral alignment of the products carried on it (1) are arranged. Device according to one of claims 1 to 7, characterized characterized in that you have a singling conveyor in the conveying direction increasingly faster running rolls or conveyor belts for the purpose of separating one delivered in a scale Product stream upstream and / or a shed layer with in Direction of conveyance increasingly slower running rollers or conveyor belts for the purpose of laying the escaping product stream in scale form are / is downstream.

Images