DE2414954A1 - DEVICE FOR CREATING GAPS BETWEEN THE SHEETS OF PAPER CARRIED BY A CONVEYOR - Google Patents

Description

Patent application

of the company

Graphic Engineers, Incorporated, 6909 Center Street, Highland , California (USA)

Apparatus for creating gaps between sheets of paper carried by a conveyor

The invention relates to a device for producing overlapping gaps in a continuous conveying flow Sheets of paper and the like.

Sheets of paper are fed, for example, from a sheet-fed or strand-fed paper machine or a paper finishing or post-treatment press conveyed away via a conveyor on which the sheets of paper overlap each other. The one on the conveyor transported paper sheet stream is a counting and

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Stacking machine supplied, as' it can be found, for example, in German patent application P 20 58 174- · 2. The device according to the invention is used to produce gaps between the sheets of paper that overlap in the conveying flow. These gaps in the paper flow, which are to be produced at predetermined intervals, actuate the stacking mechanism of the counting and stacking machine. It is therefore 'that the device operates is important _i for producing the gaps in the current paper sheet in an accurate and reliable manner so that the desired number of sheets of paper is exactly duplicated within each of the paper stack.

Apart from the counting accuracy and the precision of the working method it is necessary for the operation of the counting and stacking machine that the overlapping condition of the sheets, if necessary with a reduced amount of overlap, is retained and that no sheets of paper are in front of it in the conveying flow Arc overflows.

The object of the invention is therefore primarily to provide a device of the type mentioned with which in one Paper sheets flowed into gaps at predetermined intervals can be, whereby this device is characterized above all by exact and reliable operation target.

The device according to the invention is characterized in that it has a paper-

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24U954

lifting device and one above the paper flow Plunger or the like. in addition to a hold-down device, wherein the paper lifting device with an elongated, extending approximately in the paper transport direction and with its front, seen in the transport direction At the end of the sheet of paper provided by the lifting device lifting off the conveyor and the ram down against that of the lifting device raised paper sheets to pinch the same and hold against frictional entrainment the upstream and downstream paper sheets is movable, and that the hold-down device is also in Has the transport direction extending elongated pivot member, which at the same time during the lifting movement of the lifting member is pivotable downwards and together with this lifting element a converging, approximately wedge-shaped inlet gap forms, in which the sheets run into with further transport.

Further features of the invention are listed in the individual claims and emerge from the following description of the embodiment of the invention shown in the drawing. In the drawing show:

Fig. 1 in a partial plan view of a conveyor belt a device according to the invention for transporting paper sheets;

FIG. 2 shows the device according to FIG. 1 in side view, with the stream arranged on the conveyor

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the mutually overlapping sheets of paper can be seen;

FIG. 3 in a representation corresponding to FIG. 2 the device according to the invention in a company st el ment in which the paper flow at the point of engagement of the device according to the invention is stopped;

4 shows the device according to FIGS. 1 to 3 in one Operating state in which the bundled sheets of paper are released and transported on to the conveyor belt be deposited, wherein the desired gap has formed in the paper flow.

The device 10 shown for producing gaps in a conveying flow of overlapping sheets of paper or the like. is mounted on a transport system, which consists of a pair of endless belt conveyors 12 and 14, the end are connected to each other. Each conveyor 12 and 14 has a frame made of two parallel side rails 16, which are connected at the top via a cover plate 18 are. At the ends of the conveyor frame, cross shafts 20 and 22 are rotatably supported in bearings 24. On these waves sit belt pulleys 26 over which belt straps 28 are guided. The shaft 20 of the conveyor 14 is supported by the conveyor shaft 22 driven via a chain and chain wheel drive 23.

The transport system consisting of the two conveyors 12 and 14

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system is commonly referred to as a "pick-up conveyor" because there is a continuous stream of overlapping sheets of paper 30 from a leaf or strand-fed post-treatment or finishing press and feeds the sheets of paper to a counting and stacking machine, e.g. from the U.S. Patent 3,327,597 is known. The paper sheets 30 are on the conveyor belts 28 transported in the drawing from right to left, the conveyor 12, the paper flow to the downstream conveyor 14 passes. To operate the counting and stacking machine according to the aforementioned patent is it required that in the paper stream at predetermined intervals Column or gaps are opened. This is done with the help of device 10.

On the two opposite sides of the conveyor are two pairs of arms projecting upwards on the side bars 16 and 3 ^ attached. Two parallel, vertically spaced Cross shafts 36 and 38 are in bearings at their ends 40 rotatably mounted, which in the area of the upper ends of the arms 32 are arranged. Another cross shaft 42 is mounted with its ends in bearings 44 which are located in the region of the upper ends of the arms 34.

On shafts 36 and 38, three sets are spaced apart attached parallel arms 46 which, as FIGS. and 2 show, extend approximately horizontally from the shafts 36 and 38 " extend to the left. The parallel arms 46 each lie in a vertical plane above those between adjacent ones

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Conveyor belts 28 located spaces. The outer ends of the parallel arms 46 are connected to a head piece 48. As the drawing shows, the two outer head pieces 48 each have a plunger 50 or the like. on, which is displaceable in the vertical direction with respect to the arms or the head piece is led. The plunger is under the action of a helical compression spring 52, which presses it downwards. The spring-loaded plunger 50, 52 is as. Detachable unit mounted on the head piece 48, so that the two plungers depending on the format or width of the paper sheets or other Properties of the paper stream transported on the conveyor at any two head pieces 48 of the total of three Head pieces can be connected.

Two arms 54 are attached to the lower shaft 38, which extend obliquely downwards and are adjustable in length. The lower ends of these arms are connected to connecting organs, such as forks 56, which are hinged to the top of two spaced-apart paper hold-down devices 58 are attached. Either of these "two paper hold-down devices." 58 has a flat, elongated and essentially horizontally arranged pivot member, which is designed in the manner of a flat rail and the end 60 of which is bent upwards in the shape of a runner, so that the flat rail has approximately the appearance of a ski. The pivot members 58 extend parallel to the direction of transport of the paper lying on the conveyor belts 28

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Sheets; they are below the shaft 42, to which they are connected via an arm 62 ″, which is also adjustable in length is. The arm 62 extends according to Pig. 2 obliquely downward from the shaft 42 at an acute angle.

A pivot axis 64 is arranged below the cover plate "18, which extends over the entire width of the conveyor and the ends of which are arranged on the side rails 16 Bearings are rotatably mounted. A Mederhalterarm 66 is attached to the shaft 64, which is shown in FIG. 2 from the shaft extends obliquely to the left and up. With the free end of the Mederhalterarms 66 is a drive member 68 in the form of a handlebar or a lifting rod or the like. connected, which in turn is connected to a swivel arm 70 which is attached to the shaft 38. The swivel arm 70 is arranged horizontally as shown in FIG. The drive element extends through an opening 72 in the cover plate 18 upwards (Fig. 1). When the pivot axis 64 is rotated counterclockwise, the pivot arm 70 is over the drive element 68 pulled down, causing shaft 38 to turn counterclockwise rotated and the arms 46 and 54 are pivoted downward into the vertical position shown in FIG. Through this if the paper hold-down device 58 is lowered, with the plunger 50 being guided downwards at the same time, see above that it comes with its lower end in contact with the paper sheets.

On the shaft 64 there are also two spaced apart from each other.

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arranged arms 7 ^ "attached, which are inclined as shown in FIG extend up and right. The free ends of the pivot arms 7 ^ are via links 76 with fork-shaped connecting members 78 connected, which is located on the underside of a paper lifting device 80 are located. The paper lifting device consists of two lifting elements designed in the manner of flat rails, which lie in the spaces between the two outer conveyor belts 28 and the belts adjacent to them. they are thus arranged directly below the parallel arms 4-6 and the plunger 50. Each lifting device accordingly an elongated, thin metal band or the like. manufactured rail, the end of which (shown on the right in Fig. 1) bent downwards and hooked into an opening 82 of the cover plate 18 here. The other end of the rail to which the connecting member 78 is attached, can thus move freely in the tertiary direction when it is released from the handlebar 76 is raised. Here, the lifting member pivots around the end hooked into the opening 82, which thus forms a joint. If the pivot axis 64 is accordingly rotated in the counterclockwise direction, the link 76 is slanted upwards into the position lifted according to FIG. 3, the lifting members 80 being raised at their front end.

At the same time as the lifting members 80 are raised, the paper hold-down device 58 and the plunger 50 lowered. Included the plunger 50 presses against its lower end the sheets of paper, creating the leading edge of the sheet of paper

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clamped against the front end of the paper cover organ and thus is set so that it is taken from the paper sheets located under and in front of him, which are taken by the conveyor belts cannot be dragged along. Those sheets of paper that are lifted off the conveyor belts lose their connection with the circumferential bands, so that these sheets of paper are stopped immediately. The other sheets of paper that are in the transport direction in front of the by the plunger 50 are jammed sheets, are taken by the conveyor further, with the gap or the There is a gap in the sheet of paper that is used for counting and Stacking machine is required. The paper lifting device and the paper hold-down device 58 together form an elongated, conical in transport cover narrowing or approximately wedge-like gap in which the conveyor continues to move the overlapping paper sheets' conveyed in, with the paper sheets in the gap jam. In the gap, the paper sheets remain in mutual overlap, but the amount of overlap increases.

The time span for opening the gap is only about a second or less. At the end of the process that forms the gap in the conveying flow, the sheets of paper are removed from the interception device released again, so that they are of the. Funders can be promoted. In Fig. 4- is the Gap in the stream of paper sheets is designated by 83. The gap can at its formation about a width of e.g. 5 to 8 inches

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exhibit. When the paper sheets are transported through faster running conveyor and transfer to slower running conveyor, the gap is usually more or more less far closed. These connected sponsors can be the conveyors leading to the counting and stacking machine or on the device according to the invention itself be arranged.

The device 10 according to the invention is e.g. Pneumatic cylinder 84- actuated, which is at the bottom of the Conveyor frame is arranged in the vicinity of a side rail 16. The cylinder base is mounted on an axle 85, which extends transversely through the conveyor frame between the two side rails of the same. The piston rod 86 of the cylinder is connected to an arm 88 which protrudes downward from the pivot axis 64-. The ends of the Cylinders are connected via compressed air lines to an electrically operated valve 90, which via a line 92 is connected to a source of compressed air. The valve 90 is actuated by an electrical pulse which from an electronic counting circuit of the counting and stacking machine is supplied, which thus determines the width of the gaps.

The machine described above works as follows: If from the electronic counting circuit of the counting and stacking machine an electrical impulse is exerted on the valve 90, the pressure (shown on the left in the drawing)

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space of the cylinder 84 is pressurized with compressed air so that the piston rod 86 pushes in. As a result, the pivot axis 64 is rotated counterclockwise. The handlebars 76 have the front end of the two paper lifting devices 80, while the drive member 68 drives the shaft 38 in a counterclockwise direction rotates so that the hold-down devices 58 and the Plunger 50 are lowered. The front edge of the of the Plunger 50 detected paper sheet is here between the The plunger and the lifting members 80 are clamped so tightly that they can not be taken further while the front of this Paper sheets located sheets are transported further with opening of the gap by the conveyor. As soon as the gap 83 has formed, the valve 90 is actuated again, so that the cylinder 84 lowers the lifting members 80 again and at the same time the hold-down devices 58 and the Slide 50 lifts. The paper sheets 30 are now of the Sponsors taken away again.

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Claims (6)

24U95A Expectations . ^ Means for making gaps in a continuous Conveying flow of overlapping paper sheets and the like., Characterized in that they have one below the Pbpierstromes (30) arranged paper lifting device (74-, 76, 78, 80) and one arranged above the paper flow Plunger (50) or the like. together with a paper hold-down device (54 to 62), wherein the paper lifting device with an elongated one that extends approximately in the direction of paper transport and with its one in the direction of transport seen, the front end of the paper sheets of the conveyor (12) lifting lifting element (80) is provided and the ram (50) downwards against the paper sheets raised by the lifting device to pinch them and hold them against the plague against frictional entrainment by the and underlying paper sheets is movable, and that the hold-down device is also in the transport direction extending elongated pivot member (58) which, when the lifting member (80) is lifted, can be swiveled downwards at the same time and together with this lifting member forms a converging, approximately wedge-shaped inlet gap, in which the arches are further Run in. 2. Device according to claim 1, characterized by a common drive device (84) with which the lifting 409844/0275 VorriclittLng, the hold-down device and the plunger can be raised or lowered at the same time. 3. Device according to claim 1 or 2, characterized in that the plunger (50) on a pair of vertically pivotable, parallel and superposed pivot arms (4-6) is arranged, one of which is on one is attached above the paper sheets (30) transversely over the conveyor (12) extending transverse shaft (38), to which at the same time one of the parallel support arms (54 · »62) carrying the hold-down device is attached, wherein a pivot device is provided with which the shaft (38) is simultaneously raised with the lifting of the paper lifting device is rotatable in the sense of a simultaneous lowering of the plunger (50) and the hold-down device. 4 ·. Device according to claim 3 »characterized in that the plunger (50) is arranged on a head piece (4B) which is attached to the vertically pivotable pair of swivel arms (4-6) is mounted, the plunger held perpendicular to the paper top and relative to the head piece against the Restoring force of a ^ eder (52) can be moved vertically upwards is. 5. Device according to claim 3 or 4, characterized in that below the conveyor (12) a pivot axis (64) is arranged on which an arm (74-) is attached, which via a handlebar (76) or the like. with the front end 4098A4 / 0275 24U954 the lifting device "is connected, and that at the said Pivot axis a further pivot arm (66) is arranged, which via a drive element, such as in particular a lifting rod, a handlebar (68) or the like. connected to the transverse shaft (38) above the paper flow (30) is. 6. Device according to one of claims Λ to 5 »characterized in that the lifting device and the hold-down device each / eils have at least one rail as a lifting or holding-down member (80, 58). 409344/0275 Blank page