EP0274736A3 - Method and device for separating the bottom part of a parallelepiped shaped pile - Google Patents

Abstract

The stack (30 ′) to be subdivided is marked with a corner (30c) pushed ahead through a passage (4) through two Table tops (2, 3) is limited. At the front (3a) one table top (3) is a separating strip (27) wedge-shaped cross section attached against the diff Report (E) of the stack (30 ') has. When moving of the stack (30 ') from one table top (2) over the Passage (4) on the other table top (3) drives it Separating strip (27) between stack layers and separates one underlying part (39) of the stack (30 ') from above part. This separated stack part (39) is deflected downward through the passage (4) and is arranged in a below the passage (4) Collection container collected as a package. After the stack (30 ') completely beyond the passage (4) on the second table top (3) has been pushed, the can separated lower stack part (39) effortlessly by hand from the Collection container removed and next to the rest of the stack (30 ′) can be placed. The lower end of the stack (30 ') can now with the end of a subsequent paper web to one Continuous web to be connected.

Description

The present invention relates to a method as well a device for separating the lowest part of a cuboid stack, which consists of a length of Schwä chung lines zigzag folded material web gebil det is from the overlying part of the stack according to The preamble of claim 1 or claim 5.

It is known to feed high-speed printers, e.g. Laser printers, paper folded into stacks in a zigzag shape tracks of a given length together to form an endless track connect. For this purpose the below End of the paper web forming a first stack with the the top end of the Pa that forms a next stack connected to the pier. For such a connection it is that if necessary, put the lower end of a stack under to pull this out.

It is now known for this purpose, the stack to be subdivided to shoot through a passage provided in a table ben, in a shifting direction that is about right runs at an angle to the longitudinal extent of the passage. When driving over the passage a certain, does not fall precisely selectable number of zigzag folds through the Passage through downwards, but there is a lot to do with this the assistance of an operator is often required is.

The zigzag folds separated in this way sam meld more or less randomly on a support, of which they are now very laborious and mostly a zigzag falcon one after the other through the passage need to be pulled up.

From EP-OS 0 134 533 a method is now known, in the case of one folded from a zigzag Existing stacks of paper web only remove the bottom sheet is solved to this with the top sheet of the next most stack to connect. To remove this bottom one Sheet from the stack is placed against it on a pad advanced a passage. The lowest Point the blade with its free end towards the passage. At the front edge of the Passage is a roller with a sticky surface seen through which the bottom sheet is captured and at The stack continues to be transported through the passage will. The bottom sheet is turned over to the back and is now exposed. In place of a roller with glue a suction device can also step on the surface, which covers the bottom sheet.

This known method and the method for carrying it out suitable devices now have the disadvantage of danger a pollution and a certain constructive Additional effort. In addition, care must be taken that the stack is in the correct position on the passage too is moved.

The present invention is now based on the object de, a method and an apparatus of the initially ge to create that or which can be easily, reliable and time-saving way that lowest, best of a number of zigzag folds part of a stack from the part above to separate without any significant contribution to this help from an operator is required.

This task is according to the invention according to the characterizing nenden part of claim 1 or of claim 5 ge solves.

When advancing the stack to be divided with a Corner ahead against a separating element, the latter engages between between the stacked layers and directs the one below, made from a number of zigzag folded material web sections existing part of the stack down from. The separation takes place in each case essentially on same height, so that the separated lower part of the stack always about the same size. For this separation is no assistance from an operator at all or at most necessary at the very beginning.

The separated lower part of the stack is in the under the through let lying collecting container collected as a whole and can easily be re-entranced as a package from this collection container be taken. This is especially the case when the The depth of the collecting container is approximately the same as the format height, i.e. the Height of each determined by the weakening lines th material web sections corresponds.

The method according to the invention or the method according to the invention Device is particularly suitable for making folded Material webs of given length to form endless webs, the a printer, especially a high-speed printer leads to be.

Preferred further developments of the subject matter of the invention are described in the dependent claims.

Fig. 1 In perspektivischer Darstellung eine Vorrichtung zum Verbinden von zickzackförmig gefalteten Papier­ bahnen zu einer Endlosbahn,

Fig. 2 & 3 in Seitenansicht bzw. in Perspektive Teile der Vorrichtung gemäss Fig. 1,

Fig. 4 den Auflagetisch der Vorrichtung gemäss Fig. 1 in Draufsicht,

Fig. 5 - 8 In Seitenansicht bzw. in Perspektive Teile der Vorrichtung gemäss Fig. 1 in verschiedenen Phasen des Zusammenfügens von zickzackförmig zu Stapeln gefalteten Materialbahnen,

Fig. 9 In perspektivischer Darstellung die Verbindungs­ stelle zweier Materialbahnen, und

Fig.10 & 11 in Seitenansicht eine Variante der Vorrichtung gemäss Fig. 1.

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

Fig. 1 In a perspective view, a device for connecting zigzag folded paper webs to form an endless web,

Fig. 2 & 3 in side view and in perspective parts of the device according to Fig. 1,

4 shows the support table of the device according to FIG. 1 in plan view,

5 - 8, in side view or in perspective, parts of the device according to FIG. 1 in different phases of the joining of material webs folded into stacks in a zigzag shape,

Fig. 9 In a perspective view, the connection point of two webs of material, and

10 & 11 show a side view of a variant of the device according to FIG. 1.

With reference to FIGS. 1-9, the structure and the operation of a first embodiment of a pre direction for joining pre-folded material webs explained about an endless web.

This device has a frame 1 that has two tables plates 2 and 3. These table tops 2, 3 are in spaced apart so that between these two table tops 2 and 3 a transverse Gap 4 is formed. The two table tops 2, 3 can be arranged at the same height. But it is in In certain cases this is advantageous if the table top 2 is somewhat is lower than the table top 3. As Fig. 5 shows, are both tabletops 2 and 3 with a closed Provided cavity 5, in which one to a not shown Compressed air source connected connecting line 6 opens. At the top of the table tops 2, 3 are in the hollow Space 5 opening outlets 7 available, which means Balls 8 (Fig. 5) are closed. The cavity 5 to guided and ejected from the outlet openings 7 Compressed air creates an air cushion, which is used later will be received.

At the one, rear end face of the frame 1 is on a vertical wall 9 attached to this. At the foot of this wall is in the frame 1 a only schematically indicated feed drive 10 arranged per se known design.

Below the space 4 between the two tables plates 2 and 3, a collecting container 11 is arranged, the construction of which can be seen on the best of FIG. This collecting container 11 is formed by rods 12 which are connected in pairs in a V-shape. Down will the collecting container 11 is closed off by a bottom grate 13 sen, which is formed by individual bars 14, which between the rod pairs 12 engage, as can be seen from FIG is. The bars 14 of the floor grate 13 are common to one seeds pivot shaft 15 attached. The rods 14 can thus pivoted together in the direction of arrow A or A ' so as to adjust the depth of the collecting container 11 to be able to.

Above the two table tops 2, 3 is a support table 16 is provided, which is attached to a column 17. The latter is ver in the direction of arrow B back and forth sliding. A support arm 18 protrudes from this column 17, which runs parallel to the support table 16. On this trag arm 18 is a carriage 19 (Fig. 3) suspended along the Support arm 18 in the direction of arrow C or in return direction C 'is displaceable. There is one on this carriage 19 Separation unit 20 and an adhesive application unit 21 are attached arranges. The separation unit 20 is rotatably mounted by a Knife disk 22 is formed. The adhesive application unit 21 has an adhesive container 23 on which in vertical Direction, i.e. in the direction of arrow D, move up and down is cash. At the lower end of the glue container 23 is with provided with an adhesive application tip 23a. On car 19 can also have a pressing device not shown in detail and a detector arrangement, also not shown, for Monitoring of the adhesive application be arranged. The The purpose of this press arrangement and the detector arrangement is will be explained later.

From the support table 16, tips 24 and 25 protrude upwards, which are arranged in two parallel rows. These rows of tips 24 and 25, respectively, extend right at an angle to the direction of displacement C, C 'of the car 19. The The distance between the two rows of tips corresponds to Width of the material webs to be processed, during the Distance between the tips 24 and 25 within a row Corresponds to the edge perforations of the material webs to be processed, as will become clear later. One neighboring to the separating unit 20 and to the adhesive application unit 21 ver current section 16a of the support table 16, which at ge shown embodiment formed by a metal strip is, is with outlet holes shown only schematically 26 provided, at least over the between the Tips 24 and 25 lying area of the table section 16a extend and of which in Fig. 3 only a few holes ge shows are. These holes are marked with a not shown Vacuum pump in connection.

On the face 3a facing the table top 2 (Fig. 2) the table top 3 is a bar 27 with a wedge-shaped cross cut attached, which with its edge 27a (Fig. 2) against the table top 2 has. Along the the viewer the Fig. 1 facing longitudinal edge of the table tops 2 and 3 is a guide bar 28 attached, which only in Fig. 4 Darge represents, in the other figures for the sake of clarity however is omitted. This guide bar 28 has a first guide surface 28a, which is parallel to the longitudinal edge the table surfaces 2 and 3 runs and which extends from the Table top 3 beyond the space 4 to the table top 2 extends out. This first guide surface 28a closes a second guide surface 28b angled in relation to this which is arranged entirely in the area of the table top 2, as can be clearly seen from FIG.

As FIG. 1 shows, there are two Pa on the table top 3 pier stacks 29 and 33 and on the table top 2 a paper stack 31 placed. These stacks of paper 29, 30, 31 are each by a zigzag folded paper web 32, 33 and 34 formed. The paper webs 32, 33, 34 are bordered perforations (transport perforations) 35 and 36 as well as with Schwä transverse perforations 37 defining the lines, which the material webs 32, 33, 34 into individual web sections 38 subdivide. The folding of the paper webs 32, 33, 34 er follows along these transverse perforations 37. The three mates rial webs 32, 33, 34 are combined to form an endless web P. joined by the feed drive 10 from the stack 29 drawn and on not shown, known per se A high-speed printer, e.g. a laser printer will lead.

In the guide bar 28 are not shown in detail De detector arrangements, e.g. photocells, are arranged, which the Presence of stacks of paper on the table tops 2 and 3 monitor and those with the downstream high-speed printer are connected in terms of control in order to shut it down, if there is no supply of paper stacks. It ver stands that the length of the table tops 2, 3 be can be chosen arbitrarily large, what the provision of more than two stacks are allowed on the table top 3.

The following is now based on the paper webs 33 and 34 he purifies, like the zigzag folded paper webs be connected to each other. Above all they serve this purpose Figures 4-9.

A new batch (in this case batch 30) is placed on the table top 2. This can be done by hand or take place automatically. This stack 30 will be like already mentioned by the zigzag folded material lane 33 formed. The stack 30 rests on the through air emerging from the outlet openings 7 is formed Air cushion and can therefore be easily moved by hand. The stack 30 is now with a corner 30c ahead of the other table top 3 butted. To the stack 30 in the To bring it right, it is done by hand with its width side 30b to rest on the guide surface 28b of the guide ledge 28 brought (Fig. 4). Which is now in a slant located stack is in Figs. 4 and 5 with 30 ' designated. The stack 30 'is now along the guide surface 28b, i.e. in the direction of arrow E, advanced. In the course of this advancement now passes through the Pages 30b and 30a defined corner 30c in the active area of the separating strip 27, which into the space 4 into it protrudes. When further advancing the stack 30 'penetrates now this separating strip between two webs lying on top of each other cut 38 and thereby separate a lower part 39 (Fig.5) of the stack 30 'from the rest of the stack. This lower part 39 consists of some zigzag folds. Now the stack 30 'is during the further advancement turned back again so that the broad side 30b of the Sta pels 30 to rest on the guide surface 28a of the guide Bar 28 comes, as can be seen from FIG. The stack 30 is now advanced in the direction of arrow E '. There the separating strip 27 peeled off the mentioned lower stack part 39 completely. Thanks to the wedge-shaped design of this Separating strip 27 takes place this peeling of the lower stack part 39 without damaging the paper web 33.

The lower stack part 39, peeled off as mentioned, now falls down into the collecting container 11, like that from FIG. 6 emerges. Previously, the bottom grate 13 is by corresponding corresponding pivoting of the rods 14 to the format height has been set, so that the peeled stack lower part 39 only falls so far into the collecting container 11 that it easily removed by hand from the collecting container 11 can be taken. Ideally this will be the depth of the field container 11 adjusted so that it corresponds to the height of the web cuts 38, i.e. the distance between adjacent crosses perforations 37, corresponds.

The advance movement of the stack 30, which is also on the stack table 3 rests on an air cushion, ends as soon as the Stack 30 has passed the gap 4 and is now completely open the table top 3 rests, as shown in FIG.

The stacking part 39 located in the collecting container 11 is now removed by hand and next to the rest of the stack 30 placed, which now continues in the direction of arrow E 'against the wall 9 can be advanced if this is appropriate is. The stacking part 39 is now on the table top 2 or the table top 3 placed. The last track section 38 ‴ des Stack part 39 is also the last section of the Paper web 33, which is now with the beginning of the next paper stack 31 must be connected. This next staf of paper Pel 31 is now placed on the table top 2. The Column 17 with the support table 16 is in their Arbeitsstel ment advanced, which is shown in FIG. The two uppermost web sections 38 'and 38 "of the stack 31 bil The paper web 34 is now placed on the support table 16 placed in such a way that these two sections 38 ' and 38 ″ separating transverse perforation 37 ′ adjacent to the knit plane of the knife disc 22 comes to rest, as from Fig. 7 can be seen. This plane of action of the knife disc 22 thus runs at a distance from the transverse perforation 37 'through the foremost web section 38'. The two paper web sections 38 'and 38 "are through the Tips 24 and 25 positioned in the edge holes 35 and 36 intervene (Fig. 7). The paper web section 38 ″ is by means of negative pressure on section 16a of the support table 16 recorded.

The carriage 19, which is during the laying of the track from cuts 38 'and 38 "on the support table 16 in its rear position is now in the direction of the arrow C advanced. The adhesive container 23 is from Hand in the direction of arrow D against the support table 16 pressed so that the adhesive application tip 23a on a to the transverse perforation 37 'adjacent paper strips 40 to Edition is coming. While advancing the carriage 19 in Direction of arrow C is now the track section 38 'through the cutter disk 22 is severed along a dividing line T, which are parallel to and at a distance from the transverse perfora tion 37 'runs. This dividing line T forms together with the transverse perforation 37 'the mentioned paper strip 40, which forms part of the first web section 38 '. Simultaneously The cutting is followed by the application of the in the adhesive container 23 housed adhesive 41 on the mentioned Paper strips 40. Since the adhesive container 23 in various Report C of the carriage 19 seen the knife disc 22 before is stored, the adhesive is applied 42 to the Pa piercing strip 40 before cutting away the remainder of the first Track section 38 ', like that of Fig. 7, he readily is visible. When the cutting process is finished, the will be gone cut part of the web section 38 'from the support table 16 removed.

In order to be able to check the adhesive application 42, on Car 19 a suitable, not shown detector arrangement voltage can be provided, for example a fluorescent can have zenzampe that exposes the adhesive application. Suitable particles are admixed with the adhesive 41 when irradiated by the fluorescent lamp light up what allows a control of the applied adhesive. Depending on the type of particles added to the adhesive 41 a different type of lamp than a fluorescent lamp is required. The detector arrangement can also be of any other suitable type have education. This type of monitoring of the adhesive Trages 42 has the advantage that the adhesive 41 does not enter must be colored because colored adhesives pose a risk showing through the paper is what is un wishes is.

Now the last track section 38 ‴ of the previous is like mentions peeled stack part 39 of the stack 30 of Hand grasped and so placed on the support table 16, that its end edge 38a just before the transverse perforation 37 ' comes to rest so that the latter is not covered (Fig. 8). This positioning of the track section 38 ‴ is with the help of the in the edge holes 35 and 36 of the paper track 33 engaging pins 24 and 25 easily possible. The rearmost web section 38 ‴ of the paper web 33 is now with its end region 43 on the one with an application of adhesive 42 provided paper strips 40 of the following paper web 34 applied and glued. The two on top of each other Areas 40 and 43 are pressed together by hand. It however, it is also conceivable to use a not shown on the carriage 19 Provide pressing device that during the return movement of the carriage 19 in the direction of arrow C 'the desired to pressing causes. It is of course also possible on the support arm 18 to provide a pressing device separate from the carriage 19.

The two connected to each other in the manner described Paper webs 33 and 34 are now by hand or by means of a suitable lifting device, not shown, from Support table 16 lifted, which is now together with the carriage 19 in the direction of arrow B to the rear into the rest position is moved.

Then the resting on the table top 2 is now Stack of paper 31 with its corner first over the gap 4 moved away to the table top 3, with as already Mentioned earlier by the separating strip 27, the lowermost part of the stack 31 is peeled off, which is then in the Auffangbe container 11 falls. This is followed by the described Way of connecting the end of the paper web 34 to the An catch the next paper web, which is stacked on top of the Table top 2 is placed. The described process of the Peeling off the lowest zigzag layers from a stack and the sticking to the next paper web is repeated in the manner described.

The device or the method described for joining material webs to form a continuous web has various advantages, some of which are already evident the previous explanations. This is how the peel off the lowest part 39 of the stack quickly and properly, without damaging the paper webs. It is the assistance of an operator not or at most required to a very limited extent. The peeled off The stacked part lies in an orderly manner in the receptacle and can easily grasped and effortlessly removed from the receptacle become.

The gluing of the paper webs to be joined together can be done in a simple and rapid manner. A sticky tape fencing is not required for this. Since when joining the Paper webs the transverse perforations are not covered, it is easily possible to use the joined paper to fold or separate sheets at the connection points. The previous folding of the paper webs to Sta pel created "fold memory" remains at the Ver binding sites so that the joined Sheets of material afterwards also trouble at the connection points let go of the fold again. This can easily be done can be seen from Fig. 9, which the area of the connection shows between the paper webs 33 and 34 and from the forth happens that the transverse perforation 37 'from the last Bahnab cut 38 ‴ of the paper web 33 is not covered.

FIGS. 10 and 11 show one of FIGS. 2 and 6 corresponding representation a variant of the device shown in Figures 1-8. This variant differs det differs from the embodiment according to FIGS. 1-8 in that instead of a stationary separating strip 27 in the Space 4 between the two table tops 2 and 3 rotatably driven separating element 44 is provided, against the leading corner 30c (Fig. 4) of the Table top 2 pushed towards the table top 3 stack running. This separating element 44 has an unspecified illustrated way in the direction of arrow F circumferentially driven carrier 45, on which a separating finger 46 is is brought, which protrudes somewhat from the cylindrical carrier 45.

As FIG. 11 shows, this separating finger 46 intervenes the zigzag layers of the stack 30 pushed past a and peels off the lowermost part 39 of the stack 30 like that on hand of FIGS. 5 and 6 has already been explained. The execution Approximation form according to FIGS. 1 - 8 has compared to the variant 10 and 11 have the advantage that driving of the separating organ is omitted.

It is understood that the device described in ver different parts are different than shown can be formed.

In addition, you can not only do this in the manner described folded paper webs are glued together, but rather even those that are peeled off from rolls. It is also possible to use a glue station of the kind described instead of how shown in front of the printer also to be provided in this itself, if there is enough space there.

It goes without saying that it is also possible when together menkglue the roles of the two to be connected To exchange material webs, i.e. with reference to the 7 and 8 the paper web 33 with a cross bar foration to provide protruding material strips 40, to cover this with adhesive and then the after following web of material 34 on this paper strip 40 without covering the transverse perforation 37. The Separation and adhesive application unit 20, 21 would have to be used for the adjusted accordingly.

Instead of the liquid or pasty glue like be written, it is also possible to use this Ma material strips 40 with the help of a so-called transfer To provide adhesive with an adhesive application 42. For this suitable transfer adhesives consist of a tape-shaped Carrier that is coated on one side with adhesive. This carrier becomes the material with the adhesive layer strip 40 placed facing on the latter. Afterwards send the backing is peeled off, with the adhesive on the strip of material 40 remains.

The transfer adhesive is preferably from a roll deducted and in the required length on the material strip 40 applied.

Are the connection points of the material webs a Exposed to the effects of heat, e.g. when passing through a laser printer, heat-resistant adhesives are to be used turn.

It goes without saying that endless webs that are based on the be consist of material webs joined together in the manner described, different processing stations instead of printers for endless webs can be fed.

Claims (13)

1. Method for separating the lowermost part (39) of a cuboid stack (30), which consists of a along of transverse weakening lines (37) in a zigzag shape folded web of material (33) is formed from over it lying part of the stack (30), in which the stack (30) resting on a pad (2) across a to whose direction of displacement running passage (4) ver is pushed through the bottom one of a number of zigzag folded material web sections (38) existing part (39) of the stack (30) therethrough falls, characterized in that the stack (30) with one corner (30c) ahead of one in the area of the through let (4) effective separating element (27, 44) is moved, which enters between stacking layers and without a through separate the web of material (33) a deflection of the lowest Part (39) of the stack (30) through the passage (4) caused by and that the separated bottom stack part (39) is collected in a collecting container (11), from which this stacking part (39) is then removed again, preferably by hand. 2. The method according to claim 1, characterized in that the end (38 ‴) of the severed lowermost stack part (39) with one end (38 ′, 38 ″) of a second mate rialbahn (34) connected, preferably glued, is. 3. The method according to claim 2, characterized in that to connect the end (38 ‴) of the severed under most of the stacking part (39) with the end (38 ', 38 ") of the zig second mate folded in a zigzag shape to form a stack (31) rialbahn (34) the latter end (38 ', 38 ") from above is lifted from this stack (31). 4. Application of the method according to one of claims 1 to 3 to form a printer, preferably a High-speed printer, endless web to be fed (P) from pre fold material webs (32, 33, 34) of a given length. 5. Device for separating the lowermost part (39) of a cuboid stack (30), which consists of a along of transverse weakening lines (37) in a zigzag shape folded web of material (33) is formed, with a Pad (2) for this stack (30), which has a transverse to the path of movement of the stack to be divided (30) ver having running passage (4), characterized by a separating element provided in the area of the passage (4) ment (27, 44) that for entering between the stacks were with a corner (30c) ahead against this separation element (27, 44) moving stack (30) and deflecting the lowest, from a number of zigzag folded Material web sections (38) existing part (39) of the Stack (30) determined through the passage (4) is, as well as by one below the passage (4) ordered collecting container (11) for receiving the ab separated lowermost stack part (39). 6. Apparatus according to claim 5, characterized in that the depth of the collecting container (11) can be changed. 7. Apparatus according to claim 6, characterized in that the collecting container (11) at the bottom by means of a height adjustment Baren bottom (13) is completed, which is preferably is formed by pivotable rods (12). 8. Device according to one of claims 5-7, characterized characterized in that the separator is used as a counterpart the direction of movement (E) of the stack (30) pointing Bar (27) with a preferably wedge-shaped cross-section is trained. 9. Device according to one of claims 5-7, characterized characterized in that the separating element (44) is a separator has finger (46) which is around a substantially in Axis running in the longitudinal direction of the passage (4) (45a) is driven in rotation. 10. Device according to one of claims 5-9, characterized marked that the base (2, 3) with Aus openings (7) for a pressure medium to form an air cushion is provided. 11. Device according to one of claims 5 - 10, characterized marked that on the base (2, 3) a Guide member extending over the passage (4) (28) is provided in the direction of movement (E) of the Stack (30) seen in front of the passage (4) with one whose longitudinal direction forms an acute angle has first guide surface (28b) to which a two te guide surface (28a) adjoins, which is about at right angles to the longitudinal direction of the passage (4) he stretches. 12. Device according to one of claims 5-11, characterized marked that the backing is marked by two through the passage (4) separate supports (2, 3) is formed, of which the in the direction of movement (E) of the stack (30) seen in front of the passage (4) ordered edition (2) is lower than the other edition (3). 13. Use of the device according to one of the claims 5-12 to form a printer, preferably a high-speed printer, to be fed from a continuous web pre-folded material webs (32, 33, 34) given Length.