EP0243799B1 - Dispositif de pliage de bandes - Google Patents

Dispositif de pliage de bandes Download PDF

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Publication number
EP0243799B1
EP0243799B1 EP87105580A EP87105580A EP0243799B1 EP 0243799 B1 EP0243799 B1 EP 0243799B1 EP 87105580 A EP87105580 A EP 87105580A EP 87105580 A EP87105580 A EP 87105580A EP 0243799 B1 EP0243799 B1 EP 0243799B1
Authority
EP
European Patent Office
Prior art keywords
separating
stack
layers
separating device
edges
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87105580A
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German (de)
English (en)
Other versions
EP0243799A1 (fr
Inventor
Hermann Buck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bielomatik Leuze GmbH and Co KG
Original Assignee
Bielomatik Leuze GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19863614683 external-priority patent/DE3614683A1/de
Application filed by Bielomatik Leuze GmbH and Co KG filed Critical Bielomatik Leuze GmbH and Co KG
Publication of EP0243799A1 publication Critical patent/EP0243799A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/04—Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/08—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another
    • B65H31/10—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another and applied at the top of the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/32—Auxiliary devices for receiving articles during removal of a completed pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/20—Zig-zag folders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/11—Dimensional aspect of article or web
    • B65H2701/112—Section geometry
    • B65H2701/1123—Folded article or web
    • B65H2701/11231—Fan-folded material or zig-zag or leporello

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • DE-C-30 13 865 describes a device which solves the stack separation and the removal in the same way. It is essential that the partial stacks above and below the separating device are held on their first and last sheets by special holding devices during the entire separating process, in order to avoid displacement of the stack during separation and by obliquely lifting the upper stack part, a large triangular gap to form the insertion of the separators. This requires the use of complex machine parts such as suction devices etc.
  • a dividing element which can be swiveled into the stack from its upper edge can form a small gap at the front edge of the stack, so that the separating element can easily enter the stack. It only opens the front edge of the stack and does not carry the stack over its remaining surface.
  • the object of the invention is to ensure a safe separation even at high running speeds even at high running speeds and special types of material webs, for example perforated or perforated papers, without the need for special holding devices.
  • a main problem solved by the invention is that the layers in the stack get a curvature with increasing stack height, because the two folded edges take up more stack height than the layers themselves. As a result, the stack bulges so that the folded edges are higher than the center, which is the Introduction of the separation devices and the proper separation and removal can hinder.
  • the individual embodiments of the invention lead to the solution of the problem, but are particularly advantageous in their common application or in combination with one another.
  • the upstream cutting device ensures that the separation, which is particularly difficult to control, in the area of special sections of the material web, i.e. in the area of perforated or perforated edges of the layers.
  • folding devices which eject counted folded layers and which are usually referred to as 'stock form collators', are particularly frequently used to process layers which are used with a fixed or detachable perforated edge for processing on automatic printers of data processing systems.
  • Remaliner perforations other designs, for example special transverse areas of the material web provided with filing perforations, etc., are particularly critical because the separating devices can get caught in the perforated edges, in particular if the layers in the separating area are curved.
  • a preferably provided alignment device ensures by a bulging of the stack from below that the resulting stack curvature is shifted into the lower stack area and thus keeps the surface of the stack in the parting plane substantially flat.
  • the alignment devices according to claim 6 push through the one above the other Fold formed stack edges together to "break" the fold better and keep the curvature of the stack as low as possible.
  • the alignment devices are preferably actuated several times during the stack formation, a swivel device ensuring that they run smoothly into the stack. For example, with a stack of 250 layers, the alignment elements could take effect every 50 layers.
  • a version of the separating device is particularly preferred, in which it consists of rods with separating heads which are parallel in the direction of entry and which are designed in the manner of locking tips and ensure that the perforation on the fold is broken open and not cut open, which increases the risk of stack displacement and cutting into the web prevented.
  • the separation is further improved in that blowing air is expelled through the separating rods.
  • the device shown in FIG. 5 is normally the end section of a device for producing folded layers from a material web 13, in particular a paper web.
  • the machine part In the machine part, not shown, upstream of a folder 10, the machine part is normally simple, but more useful, i.e. Printed material webs 13 lying side by side in several format widths, provided with perforations and punchings etc.
  • the material web entering the folder 10 vertically from above is provided with folds at a predetermined distance after passing through a cutting device 110, which will be explained later, and then deposited in the form of zigzag-shaped layers 40 in the form of a stack 31.
  • the stack forms in a stack area 41, which can also be referred to as a stacking shaft, and is guided in the stacking direction 42, here vertically downward.
  • a flap folder known per se can be used as the folder, as is known, for example, from DE-C-178 663. They are driven synchronously with a shaft 19, which controls a large part of the functions of the entire stacking device 43, via an adjustment or change-over gear 7.
  • guide elements 44 are arranged on the front and rear edges, which guide the stack 31 between them in this upper area and are designed in the manner of combs or rakes.
  • the stack 31 rests on a lowerable stacking table 14, which is supported by columns 45, which are guided vertically displaceably in guides 46 and, for example, via racks on the columns, by a motor 16 via a gear and chain transmission 47 can be raised and lowered, namely from the lower position 15 to the upper position shown in broken lines in the parting plane 48.
  • the motor 16, the gear 47 and the guides 46, and thus the entire stacking table 14, are attached to a horizontally displaceable carriage 49, which is indicated by dashed lines. It can be displaced horizontally between the right position shown in FIGS. 1, 2 and 5 and the left position shown in FIGS. 3 and 4, namely in that it is coupled to a toothed belt 21 which belongs to a displacement device 50.
  • the toothed belt 21 is endlessly guided around numerous deflection rollers, for example 36, 37, 38, a drive wheel 51 and a driving wheel 28.
  • a likewise horizontal run 53 is formed, which can move a separating device 24 running in a horizontal guide 54 horizontally back and forth.
  • the separating device 24 consists of several rake-like or comb-like bars lying horizontally next to one another, e.g. Round rods, which are provided on the front with a tip 55 and can pass through the comb-shaped guide elements 44 adapted to them.
  • the separating device 24 can be moved back and forth between the position shown in FIG. 1, in which it lies outside the stacking area 41, and the position according to FIG. 3, in which the tips 55 protrude through the left guide element 44.
  • the displacement device 50 is driven via a gear 56 connected to the drive wheel 51 in a rotationally fixed manner, a toothed segment 27 which is in engagement therewith, a crank 57 attached thereto, a connecting rod 58 and a one-armed lever 59 which is articulated on a pivot bearing 61 and a driving roller 60 carries, which follows a curve 20 on the shaft 19.
  • the segment 27 is moved back and forth on the linkage 57 to 61 from the curve 20 and thereby also rotates the drive wheel 51 to and fro, so that the carriage 51 coupled to it and the separating device 24 each horizontally in the same direction and by the same amount - and be moved around.
  • Toothed belt drives could also be another displacement device, for example with levers directly from a curve or a pneumatic drive.
  • the two toothed belts running in front of and behind the stacking areas in the drawing have created a relatively adaptable displacement device which at the same time also drives a belt conveyor 18 forming a removal device 62 for the stacks 31.
  • a bulging device 140 which will be described later with reference to FIG. 10, is contained in the removal device.
  • the toothed belt 21 runs around the driving wheel 28, which it rotates back and forth oscillatingly and is connected via a freewheel 2g to a drive wheel 30 for the belt conveyor 18, as a result of which the drive wheel is always only taken in a clockwise direction and thus the belt 18 only gradually is transported in the direction of arrows 63, in each case by the amount 64, ie the division between two stacks on the removal line.
  • the belt conveyor 18 is guided around numerous deflection rollers in such a way that it forms two horizontal belt sections 65, 66, of which the one which runs in the region of the stacking table can be raised independently of the belt section 66.
  • the belt is guided at the beginning and end of the belt section 65 in a Z-shape over a pair of guide rollers attached to a lifting element 68 and then provided with compensating sections which are held under tension by spring-loaded guide rollers 67.
  • the lifting elements 68 can be lifted by pneumatic cylinders 17 at the same time and thus raise the belt section 65 with the arching device 140 above the level of the lower position 15 of the stacking table 14 (see FIGS. 2 and 3). In the lowered position shown in FIG.
  • the belt conveyor 18 consists of belts arranged at a distance from one another, through whose plane the stacking table, which likewise consists of individual bars arranged at a distance from one another, can pass.
  • At the bottom of the stacking table 14 there is at least one strip-shaped support 34, on which the stack edge of a stack that has been removed on the left in the drawing can be supported when it is being transported away from the stacking area and during the transition between the belt sections 65, 66.
  • the support is connected to the columns 45 at the lower end via a yoke.
  • Fig. 1 it is indicated with a dashed line that for manual adjustment the entire belt section 18 with its deflection rollers, the lifting mechanism 17, 68 and the drive wheel 30, as well as the stacking table together with the slide 49 can be raised to an upper position 35, if stacks with a lower height are to be produced.
  • the displacement device 50 also lifts with its deflection rollers 36, 37, 38, the toothed belt 21 and the driving wheel 28; however, the drive wheel 51 remains stationary.
  • the drive of the displacement device 50 and of the discharge device 62 driven indirectly by this is therefore not impaired by the height adjustment.
  • Alignment elements 22, 22a are made on the top edge of the stack 31 and above the separating device 24, each consisting of a latch-like lever with a tip or cutting edge 72 and a pressure surface 72a. It is articulated at one end of a rod 73, which is guided in sliding guides 74 above the separating element 24 at an angle between approximately 10 and 30 ° with respect to the horizontal. A further rod 75 is guided parallel below it, which acts on the aligning element 22 with a roller 76 at its end and thus between an obliquely upward position (FIG. 1) and an obliquely downward position on the stack (approximately in the extension of the rods 73, 75 as in Fig. 2 and 3) can pivot. Each of the rods 73, 75 is connected to the piston of a pneumatic cylinder 23, 23a.
  • a dividing element 22a is provided, which is similar in its design and effect to that previously described.
  • These alignment elements 22a on the left in the drawing are also driven by means of pneumatic cylinders 23, 23a.
  • the alignment elements 22, 22a are arranged such that they are normally in the area of the stacking edges 69, 69a above the stack, that is to say in the area of the folding rollers 11, 12, so that they can engage in the stack from above before it forms.
  • the alignment elements move into the stack without risk of collision with the layers and pivot through the parting plane 48, pressing the folded edges 82, 82a on the stacked edges 69, 69a and compressing the fold there so that it is as low as possible than the layer thickness itself.
  • the alignment elements 22 In its downwardly pivoted position, the alignment elements 22 are in a gap in the separator with their tips in front of the retracted tips of the separator 24 so that they share the stack for retracting the separator.
  • the separating head 100 shown in FIGS. 6 to 8 forms the front end of each rod 101 of the separating device 24.
  • the rods 101 run horizontally and parallel to one another in the insertion direction of the separating device 24.
  • the separating head 100 has the shape of a spearhead with a rhombic cross section, the edges of which 102, 103 converge in the front tip 55.
  • the separating head is wider and thicker than the associated rod 101, so that between two separating heads 100 there is a very small distance a in the horizontal direction, which only makes up a fraction of the total width of the separating head or the division b between the rods (preferably 5-10% ). However, if alignment elements 22a are to intervene there, the distance can also be chosen to be larger.
  • the separating head 100 has the greater width its rhombic cross-section in the horizontal direction and the edges 102 pointing in this direction enclose an angle between 45 ° and 90 °, preferably approximately 60 °.
  • the angle enclosed by the upward and downward-pointing edges 103 is only half as large and is between 25 ° and 40 °, preferably at just under 30 °.
  • the rhombic tip merges into a cylindrical and then into a conical cross section 107, which reduces the overall width of the separating koof to the dimensions of the rod 101.
  • the edges 102, 103 are not sharpened, but deburred.
  • the separating heads 100 can be provided with blown air openings 160.
  • Four blowing air openings can be provided for each cutting head, one in each of the four surfaces delimiting the cutting head. They are arranged in the retraction direction and slightly apart and connected to a central air duct 161, which is provided in the separating head and the separating bars 101. It is also possible to provide blowing openings 160 only on one, preferably the lower side of the separating head and to supply blown air to support the separation during the separating process.
  • FIG. 9 shows the cutting device 110, which is arranged directly in front of the folder 10 in the path of the material web 13. It contains a cross cutter 111 with a knife shaft 112 and a counter knife roller 113, against which the cutting knives 114 clamped in the knife shaft 112 work. These consist of individual pieces or sections which are arranged along the knife roller 112 in such a way that incisions 115 occur only in certain transverse regions (see FIG. 11).
  • the cross cutter 111 is driven by an intermediate gear 116 from the drive of the folding drums 11, 12.
  • a knife shaft support 125 carrying the knife roller 112 is in the embodiment on a linear guide 117 by means of a ball bushing 118 horizontally displaceably and loaded by a spring 119 so that the knife shaft 112 is normally moved away from the counter-knife roller forming the counter-cutting surface and the material web 13 is unaffected by the cross cutter runs through.
  • the knife shaft 112 is brought into cutting engagement by a pawl 120, which is driven to oscillate in the longitudinal direction by a pivotable lever 121 via a roller 122 and a cam disk 123. Normally, the pawl is pulled upwards by a pneumatic cylinder 124 and is therefore out of engagement with the knife shaft support 125. The pawl 120 then runs back and forth empty. Only when the pneumatic cylinder 124 is actuated does the pawl engage the knife shaft support 125 in the manner shown in FIG. 9 and is thus ready. Then, when the cam 126 of the cam disk 123 moves the pawl 120 to the left in the drawing via the roller 122 and the lever 121, the knife shaft 112 is pressed against the counter knife roller 113 and the partial cutting process is triggered.
  • the cam disk 123 is synchronized with the drive of the alzer 10, but can be reduced so that it makes one revolution for every ten layers, for example. Since the cam 126 occupies a maximum of one tenth of the circumference of the cam disk 123, the cut can nevertheless be made at a precisely defined point, which is set up in such a way that it takes place exactly in the fold edge 82a, which is later also separated by the separating device 24.
  • the bulging device 140 is shown. It is part of the removal device 62 and is set up to give the belt conveyor 18 an upward curvature in the region of the stack 31, while the separating device 124 is moved into the stack at the top.
  • the arching device 140 has two free-running support rollers 141 for the belt conveyor 18, which can be pivoted on lever arms between a broken-down position shown in broken lines and an effective upper position shown in full lines.
  • the lever arms are coupled to one another via gear wheels 142, one of which can be pivoted by a pneumatic cylinder 144 via a lever 143.
  • a pair of deflection rollers 145 acting on the belt conveyor from both sides supports the belt section 65 of the belt conveyor 18 in the area in which it carries the stack.
  • FIG. 11 shows a top view of the layer 40 and the separating device 24 in the separating plane 48.
  • the layers 40 formed from the material web 13 are two-dozen, ie two forms 150 are folded and stacked next to one another. They have a separable border on both sides 151, in which transport perforations 152 are made running in the longitudinal direction of the material web.
  • the incisions 115 are also provided in this area. They therefore extend over the transverse regions 153 formed by the remaliner edge, which are each provided at the edge and (in double width) in the middle of the layer and can advantageously also be considerably wider, for example about 50% wider than the edge width 153 , as shown. Incisions 115 could also be made at other points.
  • the limit in the number and width of the incisions is given by the fact that the material web 13 still runs perfectly through the folder.
  • An arrangement of the cutting device directly in front of the separating device or in front of the folder is important because the cohesion of the layers should be even better in previous processing stations.
  • the separating device formed from individual separating bars 101 is arranged in groups which each occupy an area delimited by the clamp 155. This area lies between the edges 151, so that there are no separating bars in the area of the edges 151, even where these lie in the middle of the position.
  • the separating bars 101 are provided with a rotary drive 159 and, for this purpose, carry pinions 156 at their ends remote from the separating heads 100, which engage in a toothed rack 157 which can be moved back and forth by a pneumatic cylinder 158.
  • FIG. 1 shows a working step in which the formation of a high stack 31 on the stacking table 14 is almost complete.
  • the stacking table 14 has reached its lower position 15, the separating device 24 and the alignment elements 22, 22a are outside the stacking area 41.
  • the rod 73 is now pushed towards the stack by actuation of the pneumatic cylinder 23, so that the alignment element pivots into the stack area 41, specifically via the top layer that is being formed on the folder. It pivots into a position in which the tip 72 is in front of the tip 55 of the separating device.
  • the alignment elements therefore run into the stack as it forms and therefore do not need to first split the layers.
  • the pivoting-in process continues until a number of layers have been deposited on the alignment elements in order not to hinder the newly formed layers when the folded edges 82, 82a are pressed together.
  • the alignment elements 22, 22a are strip-shaped and each arranged between two separating bars 100, and are of such a height that their lower pressure surfaces 72a can compress the folded edges considerably.
  • the alignment elements are pivoted in during stack formation, e.g. every 50 layers, so that in a stack of 200 layers, alignment is carried out four times by squeezing until it is relatively far below the parting plane 48.
  • the layers in the stack 31 thus remain relatively flat. While the left alignment elements 22a are extended again before the separation process, the right alignment elements 22 remain in the stack and form a gap into which the separation devices can enter.
  • the belt section 65 of the belt conveyor IB of the removal device 62 is lifted through the plane of the stacking table 14, so that it takes over the stack 31. This is done by actuating the pneumatic cylinder 17 using the compensating path formed by the spring-loaded deflection rollers 67.
  • the curve 20 actuates the toothed segment 27 and thus the drive wheel 51 of the toothed belt 21 via the lever mechanism 57 to 61 in such a way that the displacement device 50 formed thereby simultaneously the slide 49 and thus the stacking table 14 with its lifting mechanism and the separating device 24 in the guide 54 pulls horizontally to the left.
  • the stacking table is now to the left of the stacking area 41 and the separating device 24 moves into the stack 31, runs between two layers 40 and cuts through these layers in the area of the rear fold edge 82a, where the layers are only connected to one another by a perforated line (FIG. 3).
  • the tips 55 and cutting edges 102 of the separating heads 100 interact with the guide element, which forms a type of counter bearing or shear bar.
  • the rotary drive 159 serves for the separating bars 101 for better cutting even when the separating heads 100 are at a slightly greater distance from one another than is shown in FIG. 8.
  • the rack 157 is actuated once by actuating the pneumatic cylinder 158. and moved so that the separating rods make a rotation, preferably about 90 ° back and forth.
  • the flat-rhombically shaped cutting heads 100 rotate out of their alignment, which is normally lying flat in the cutting plane 48 so that they assume a much greater height and thus certainly break open the perforation on the separating fold 82a without exerting any significant transverse force on the stack.
  • a signal for actuating the pneumatic cylinder 124 was output in such a way that exactly the separating fold received the cuts 115 which, under further guidance by the aligning elements 22 and the separating device 24, are provided for stack separation. It is also an advantage of the invention that the folding and stacking takes place from the cutting device 110 to the separation point in a sheet-precise manner because the alignment element 22 already takes over the layers directly at the exit of the folder 10, that is to say there is no accidental separation at a certain stack height.
  • the locking pawl which is normally pressed against the cam plate 123 by spring force and runs on it with the roller 122, is engaged in the position according to FIG. 9, while the roller is not lifted by the cam.
  • the knife shaft 112 is then advanced against the counter knife roller 113 and carries out the cuts 115.
  • the roller 122 leaves the cam 126, the pawl 120 withdraws and the knife shaft support 125 is pulled back into an inactive position of the cross cutter by the spring 119.
  • other cutting devices could also be used, for example a cross cutter with a fixed counter knife, wherein either the knife shaft or the counter knife could be advanced for periodic cutting.
  • Other cutting devices for example cutting devices with a linearly moving knife, are also possible.
  • the pneumatic cylinder 144 of the arching device 140 was actuated and pivoted the tape rolls 141 from their lower position, in which they left the tape 18 running over them, into the swiveled-up position shown in FIG. 10, so that they now give the volume an upward curvature.
  • This also bears to a stack that is as flat as possible in the parting plane 48, which facilitates the retraction of the separating device even with difficult papers.
  • the arching of the belt section 65 can be removed again by corresponding actuation of the pneumatic cylinder 144 and lowering of the belt rolls 141.
  • Fig. 4 shows that the lifting elements 78 are now lowered again by retracting the pistons in the pneumatic cylinders 17, so that the belt section 65 comes back to the level of the belt section 66 and the stack 31 is lowered accordingly.
  • the stacking table 14 is raised through the belt plane to the position 48, in which its stacking surface 83 is approximately aligned with the upper edge of the separating devices 24.
  • the stacking table 14 moves upward next to the stacking area 41.
  • the alignment element 22 is withdrawn from the stacking area by actuating the pneumatic cylinders 23, 23a.
  • the pivoting and advancing movement indicated in FIG. 4 by the bent arrow 84 is carried out, in which first the alignment element 22 is pivoted up in the retracted position of the rod 73 by advancing the rod 75 and then by simultaneous movement of the rods 73, 75 onto the stack to the dividing element 22 in its upward position is pushed into the waiting position according to FIGS. 1 and 5, so that it is ready for use again.
  • the separation device 24 Since the separation device 24 was retracted (FIGS. 3 and 4), a new partial stack 85 has formed on the separation device, which thus carries the partial stack 85 during this period. For this reason, the separating device is located relatively close to the folder, but at such a distance that a certain partial stack, which is formed until the end of the stack changing process, can be formed and accommodated between separating device 24 and folder 10.
  • Fig. 5 shows that now under the action of the turning curve 20 via the connecting mechanism, the segment 27 is pivoted to the other side, so that the drive wheel 51 moves the toothed belt 21 of the displacement device 50 so that the separating device 24 and stacking table 14 horizontally in the same direction and moved synchronously to the right in the drawing, so that the separating device 24 moves out of the stacking area 41 and the stacking table 14 moves into the stacking area.
  • the stacking table 14 and the separating device 24 move without a gap adjoining one another and even overlapping somewhat by the tips 55 of the separator direction on a side bevel of the stacking table. This mutual position had already been assumed in FIG. 4 and is maintained during the transfer to the right.
  • the partial stack 85 formed on the separating device 24 is pushed through the right-hand guide elements 44 onto the stacking table 14, which now again assumes its role as the lowerable carrier of the stack.
  • the stacking table 14 is now lowered in the stacking direction 42 by the motor 16 in accordance with the formation of the stack (FIG. 1).
  • Fig. 5 also shows that simultaneously with the movement of the toothed belt 21, the driving wheel 28 was rotated, which took the drive wheel 30 for the belt conveyor 18 in this direction via the freewheel 29 and thereby shifted the belt 18 by the amount 64, in the region of Belt sections 65, 66, which are here at the same level, to the right, that is, under the separating device 24 and between the toothed belts 21.
  • the stack is supported by the support strips 34 as it runs over the gap between the two belt sections 65, 66. There is thus a gradual removal of the stacks 31 formed on the belt section 66, from where they can be transported or removed.
  • another removal device can also be used, for example a device that works with slides or gripper fingers that move the stacks on a table or roller tracks.
  • raising the belt section 65 is advantageous and after the subsequent lowering of this section there is sufficient free space above the stack to be able to be transported under the separating device, it would also be possible to carry out the transfer with a corresponding lower belt height by correspondingly lowering the stacking table .
  • the indirect drive of the belt conveyor 18 via the toothed belt by means of a freewheel ensures reliable synchronization of the movement.
  • a drive for the belt conveyor derived directly from the synchronous shaft 19 could also be provided.
  • the clock shaft 19 is connected to the drive of the folding rollers 11, 12 in such a way that it makes one revolution at a certain minimum number of layers 40, for example for 100 or 200 sheets. If stacks with a larger or smaller number of layers divisible by this minimum number are required, the synchronous shaft 19 is decoupled for a few revolutions. During this time, the stack is then formed (in the position between FIG. 5 and FIG. 1 following in the cycle).
  • the motor 16 and the pneumatic cylinders 17, 23 are controlled in the work sequence described by a control device which can also be actuated, for example, via curves or cams on the synchronous shaft 29.
  • the speed of the motor 16 should be adjustable according to the "growth speed" of the stack.
  • the individual auxiliary devices 110, 140, 160 etc. are used depending on the type and quality of the materials to be processed as well as their design and pre-processing as well as on the required running speed. They all work for the same purpose, to enable perfect stack separation without holding the layers above and below the separation point. In detail, however, they can be designed differently from the embodiment sketched in the drawings. For example, the arching of the stack in the lower region can also be carried out by molded parts acting from below, an archable bottom during slide transport, etc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Pile Receivers (AREA)

Claims (10)

1. Dispositif pour le pliage de bandes de matériau, notamment de bandes de papier, et pour leur dépose en une pile (31) de couches repliées (40), avec une plieuse (10) et un dispositif d'empilage (43) dans lequel la pile se forme, dans une direction d'empilage (42), dans une région d'empilage (41 ), avec au moins un dispositif de séparation (24) pour détacher la pile (31), qui est disposé à la suite de la plieuse (10), et avec un entraînement de dispositif de séparation (50) qui introduit le ou les dispositifs de séparation (24) perpendiculairement à la direction d'empilage (42) dans la pile (31) et le ou les retire de cette dernière, et, lors de son introduction dans la pile (31), réalise le détachement par séparation le long d'une arête de pliage (82a) entre deux couches (40), caractérisé par un dispositif de coupe (110), qui est disposé avant le dispositif de séparation (24) dans le sens d'avancement du matériau (130), et qui coupe partiellement les couches, dans des zones transversales (115) munies de perforations et/ou de poinçonnages (152), sur l'arête de pliage (82a) prévue pour le détachement total ultérieur par le dispositif de séparation (24).
2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de coupe (110) est un découpeur transversal (111), de préférence rotatif, entraîné et commandé en fonction de la plieuse (10) et du dispositif de séparation (24) et entraîné, avec des lames (114) disposées par tronçons sur la largeur de la bande de matériau.
3. Dispositif selon la revendication 2, caractérisé en ce que le dispositif de coupe (110) présente un dispositif d'asservissement en vue de commander au découpeur transversal une coupe périodique conformément au nombre de couches (40) pour chaque pile (31), dispositif qui est commandé par l'intermédiaire de cames (123, 126) et qui est muni d'un dispositif d'embrayage (120) pour le couplage de la commande à cames avec le découpeur transversal (111), et notamment le dispositif de séparation (24) est prévu seulement dans les zones transversales (155) des couches (40) qui se trouvent entre les zones transversales (115) coupées par le dispositif de coupe.
4. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il est prévu dans la région d'empilage (41) un dispositif de nivelage pour le nivelage de la surface des couches (40) dans la pile (31), dispositif qui agit sur la pile (31) déjà formée.
5. Dispositif selon la revendication 4, caractérisé en ce que le dispositif de nivelage soulève la zone des couches (40) de la pile formée (31) qui est située entre les arêtes de pliage (82, 82a), et est notamment constitué d'un dispositif de bombement (140), qui est de préférence réalisé sur un dispositif d'évacuation (62) constitué d'une bande transporteuse (18), et qui peut être actionné de manière périodique.
6. Dispositif selon la revendication 4 ou 5, caractérisé en ce que le dispositif de nivelage contient un élément de nivelage (22, 22a) disposé au moins sur le bord de pile (69a) qui contient l'arête de pliage (82a) à détacher, élément qui est conçu pour comprimer périodiquement la pile (31) sur ce bord de pile (69a) et qui peut être actionné plusieurs fois pendant la formation de chaque pile (31), l'élément de nivelage disposé sur le bord de pile (69a) qui contient l'arête de pliage (82a) à détacher, étant de préférence désengagé d'avec la pile (31) pendant la séparation des couches (40) entreprise par le dispositif de séparation (24), tandis que l'élément de nivelage disposé sur l'autre bord de pile (69) est rentré dans la pile (31) dans la région du plan de séparation (48) pendant l'introduction du dispositif de séparation (24).
7. Dispositif selon l'une des revendications précédentes, caractérisé en ce que des arêtes de séparation (102, 103) de barres de séparation (101) du dispositif de séparation (24) sont prévues sur une tête de séparation (100) qui possède une forme aplatie, de préférence du genre pointe de javelot, et la tête de séparation (100), qui se rétrécit vers l'avant en une pointe (55), possède de préférence une section rhomboïdale avec quatre arêtes de séparation (102, 103), qui est de préférence d'une épaisseur approximativement égale à la moitié de sa largeur, et dont la plus grande diagonale se situe dans le plan de séparation du dispositif de séparation (24), l'angle inclus entre les arêtes de séparation (102) situées dans le plan de séparation étant notamment compris entre 45° et 90°, et de préférence égal à environ 60°, et l'angle inclus entre les arêtes de séparation (103) orientées perpendiculairement au plan de séparation étant compris entre 25° et 40°, les têtes de séparation (100) dépassant notamment de la périphérie des barres de séparation (101) et ne laissant entre elles que des intervalles faibles (a), qui sont de préférence d'un ordre de grandeur de 5 à 10% de l'écartement (b) entre les barres de séparation (101).
8. Dispositif selon l'une des revendications précédentes, caractérisé en ce que des sorties d'air de soufflage (106) sont prévues sur le dispositif de separation (24).
9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que des sorties d'air de soufflage sont disposées dans des zones de surface limitrophes des arêtes de séparation (102).
10. Dispositif selon la revendication 8 ou 9, caractérisé en ce que les sorties d'air de soufflage (106) sont disposées sur le dessous des dispositifs de séparation dans la région de séparation, et leur alimentation en air de soufflage peut de préférence être mise en route pendant les opérations de séparation.
EP87105580A 1986-04-30 1987-04-15 Dispositif de pliage de bandes Expired - Lifetime EP0243799B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3614683 1986-04-30
DE19863614683 DE3614683A1 (de) 1986-01-14 1986-04-30 Vorrichtung zum falzen von materialbahnen

Publications (2)

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EP0243799A1 EP0243799A1 (fr) 1987-11-04
EP0243799B1 true EP0243799B1 (fr) 1990-10-31

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EP87105580A Expired - Lifetime EP0243799B1 (fr) 1986-04-30 1987-04-15 Dispositif de pliage de bandes

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US (1) US4778165A (fr)
EP (1) EP0243799B1 (fr)
JP (1) JPS62264168A (fr)
DE (1) DE3765826D1 (fr)

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Also Published As

Publication number Publication date
JPS62264168A (ja) 1987-11-17
DE3765826D1 (de) 1990-12-06
EP0243799A1 (fr) 1987-11-04
US4778165A (en) 1988-10-18

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