EP0624537A1 - Device for collecting a predetermined number of sheets - Google Patents

Abstract

The device for collecting a predetermined number of sheets, in particular paper sheets or the like, operates in such a way that the collected sheets are taken from a pile or from a continuous web at a station I and are transferred to a station II located below station I. This takes place with the aid of two flaps (12) which are arranged at the exit of station I and can be pivoted simultaneously about axes lying in a common horizontal plane from a horizontal collection position into a transfer position directed vertically downwards. From the transfer position they can then be pivoted back into the collection position. These flaps, which are of lightweight design, constitute a simple means for reliably collecting and rapidly transferring piles of sheets of any height. <IMAGE>

Description

The invention relates to a device according to the preamble of patent claim 1.

Such devices are known in different configurations. In a known device, the blanks are collected in station I, the so-called catching station, before they are passed on to a further processing station. This is done with the aid of horizontally movable slides, which move or release the predetermined number of blanks after the desired number of pieces has been reached. This creates an unavoidable loss of time, which occurs when the slide moves in and out when the blanks are transferred from station I to station II.

Furthermore, a device according to the preamble of claim 1 is known from DE-OS 35 38 26, in which two wing-like profiles or turnstiles are used are rotatably mounted at the exit of station I and have a synchronous drive for a simultaneous, opposite rotary movement. These devices work without any significant loss of time, but the stack height is limited because the blanks can be compressed in higher stacks due to the counter-rotating movement of the turnstiles.

The invention is therefore based on the object of providing a device of the type mentioned at the outset which, without any significant loss of time, can also transfer stacks of greater height without difficulty, and at the same time is of simple construction.

This object is achieved according to the characterizing part of claim 1. The flaps are advantageously moved with the aid of rotary magnets (claim 2), optionally supported by a spring (claim 3).

According to the invention, two very light flaps are provided which are horizontally spaced apart in the collecting position or position and which accommodate the desired number of blanks. When the corresponding number has been collected, the flaps are pivoted downwards by approx. 90 °, so that the stack falls on the station II underneath. This is done appropriately with the help of the rotating magnet. This movement can take place so quickly that there is no significant loss of time that would play a role in practice. The rotary magnets are particularly suitable in combination with the light flaps to carry out this fast and reliable movement.

The invention is explained in more detail below with reference to the drawing.

Fig. 1

eine Seitenansicht einer Ausführungsform einer Vorrichtung nach der Erfindung;

Fig. 2

eine Ansicht der Darstellung der Fig. 1 von rechts;

Fig. 3

eine Ansicht der Darstellung der Fig. 1 von oben;
und

Fig. 4

eine der Fig. 2 entsprechende Ansicht, jedoch nach dem Übergeben eines Zuschnittstapels.

It shows:

Fig. 1

a side view of an embodiment of a device according to the invention;

Fig. 2

a view of the illustration of Figure 1 from the right.

Fig. 3

a view of the illustration of Figure 1 from above.
and

Fig. 4

a view corresponding to FIG. 2, but after the transfer of a blank stack.

The device shown in the drawing is basically constructed with respect to its first part as described in DE-OS 28 29 151. This part contains a counting machine 11 and comprises a scraper roller mounted on a shaft, to which the blanks 15 are fed from a stack by means of a friction belt and are individually conveyed away by a roller conveyor. At the exit of the roller conveyor there is a photocell with a transmitter and receiver, which can be counted according to the corresponding electronic code.

The blanks 15 are then collected in the device according to the invention, generally designated 10, which can also be referred to as a catching device. In this respect, this part forms station AI. At the end of the movement path of the blanks in station I, an adjustable stop 22 is provided for the blanks.

The blanks are collected at the exit of station I with the aid of flaps 12, which assume their horizontal collecting position in FIG. 2. An electric rotary magnet 14 as a drive belongs to each flap. The flaps are attached to the output shaft of their rotary magnet. The output shafts practically form the axes of rotation of the flaps.

With the help of the rotary magnets, the flaps lying in one plane can be pivoted from their horizontal collecting position into the vertically downward transfer position. This situation is shown in Fig. 4. This happens in that the rotary magnets 14 are de-energized so that they release the stack downwards. This movement is supported by springs, not shown.

Such rotary magnets are generally known. They have a rotating anchor that is attached to a shaft on both sides and that performs an angularly limited rotary movement between two internal stops. Anchor and core are e.g. with end faces at an angle to the armature shaft, between which the working air gap is located. When the solenoid coil is energized, the rotating armature tends to reduce the working air gap, i.e. the armature turns until the stops are reached. Basically, the rotary magnets must be arranged and designed so that the flaps move quickly and reliably.

The blanks released and previously counted through the flaps fall down into the lower area of station 2. The conveying level of station 2 is designated by 24. The blanks are carried away by carriers 26.

The flaps can be moved easily and very quickly from the transfer position back to the catch level, so that the next stack of blanks can be put together. It can be seen that the flaps are spaced from one another and that their axes of rotation form a common plane, the axes of rotation in the embodiment shown running parallel to the movement of the blanks from the counting machine into the actual transfer station.

Claims (4)

Device for collecting a predetermined number of blanks, in particular paper sheets or the like, from a stack or from an endless web at a station I and transferring them to a station II located below station I, characterized in that at the exit of station I for collecting the Cuts (15) two flaps (12) are arranged, which can be pivoted about axes lying in a common horizontal plane from a horizontal collecting position into a vertically downward transfer position and back again into the horizontal collecting position. Apparatus according to claim 1, characterized in that the pivoting movements of the flaps (12) are carried out by electrical rotary magnets (14), the output shafts of which form the pivot axes of the flaps. Device according to claim 2, characterized in that the pivoting movements of the rotary magnets (14) into the transfer position are supported by a spring. Device according to one or more of the preceding claims, characterized in that each flap (12) is adjustable to adapt to the different cut formats.

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