DE7632000U1 - FOLDING MACHINE - Google Patents

Description

The invention relates to a folding machine with several folding devices, in which a folded sheet introduced into the folding machine is successively folded into a booklet is, and at least one perforating device, which is arranged between two folding devices and a row in the sheet of slots extending along the fold line around which the sheet is folded in the next following folder will.

In these known folding machines, the perforating devices provided between the folding devices to facilitate the folding

I along the perforation line to facilitate. The well-known perforators »;

Devices therefore produce linear slots. f

The purpose of the invention is to create a folding machine with which a folded sheet can be folded into a booklet can be, whose individual sheets can be connected to one another by gluing, in which case then the booklet, if necessary can be connected to the book cover. The known binding methods of this type are under the name "Adhesive binding process" and the bonds produced thereby are known as "adhesive bonds".

A booklet is a folded sheet that has been folded several times, e.g. four times. In the professional world there is also the Designation signature usual. The last fold, e.g. the fourth fold on a folded sheet that has been folded four times, also forms that Bund called spine, in which two sheets of the booklet merge into one another and are connected to one another if the connection with other sheets is interrupted at the remaining edges of the sheets, e.g. by trimming the binding margins. In the following, a book is understood to mean a product that consists of several sheets, one on top of the other, which are attached to a Kan-f te, namely on the spine of the book, are connected to each other. A book I can be formed from a single folded sheet, i.e. only one | Have booklet. But it can also consist of several, to one | Book block compiled booklets exist, which after the addition i

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collect together to form a book block on the spine of the book block.

The sheets of each booklet can be sewn by wire or thread be connected to each other. With the adhesive binding mentioned above, the spine of the single issue or the The back of a book block is milled off so that the individual sheets in each booklet are separated from one another. Subsequently the spine of the booklet or book block is then coated with an adhesive, which then holds the very narrow edges of the sheets together.

Compared to the known wire and thread stitching, adhesive binding has the advantage that it can be carried out very easily is. The disadvantage of adhesive binding, however, is that it is expensive to mill off the staple or book block spine and loud milling devices are required and that the individual sheets loosen very easily in the finished book be able. Books held together by adhesive binding are therefore relatively cheap and at the same time inferior.

The invention is based on the object of creating a folding machine of the type mentioned at the outset with which booklets are produced can be, in which the individual sheets without the use of loud and expensive milling devices through an adhesive binding can be connected to each other.

This object is achieved by the folding machine according to protection claim 1. This ensures that the slots punched by the folding machine at the exit of the penultimate folding device form recesses in the spine of the booklet folded from the last folding device, the opening of which is due to the width of the slots, which is preferably greater than - \ - times the thickness of the booklet can, for example, extend over the entire thickness of the booklet, so that the adhesive applied to the booklet spine, for example by a glue wheel, easily enters this

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Recesses can penetrate to their bottom and this ensures that the innermost sheet of adhesive can be detected. Each of these recesses is provided on its sides by extending essentially at right angles to the spine of the booklet flat walls and bounded by a concave base, within which the slot edges are fanned out on top of one another, because in the fold forming the spine of the booklet, the inner layers are folded with a smaller radius of curvature than the outer layers. If at least the bottom of these recesses is coated with adhesive, then the individual sheets held together by the adhesive at least along the edges created by this fanning. Also be the sheets connected to one another by the last fold through the sheets remaining between the rectangular slots Bridges held together. It is also not the case with the booklets folded on the folding machine according to the invention necessary to bevel the spine of the booklet or book block. Another advantage is that the punched chips as opposed to the dust generated during milling, are for sale, reducing the cost of using a perfect binding process in the booklets produced with the folding machine according to the invention compared to the known can be further reduced.

In summary, it can be stated that the booklets folded on a folding machine according to the invention are essential Easier and more cost-saving can be linked to a book by perfect binding, which becomes a better product performs as itself the booklets produced on known folding machines and bound by wire or thread stitching.

The punching of the rectangular slots can be advantageous in one Embodiment of the folding machine according to the invention according to protection claim 2 during the transport of the folded sheet carried out from the penultimate to the last folder

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so that no time is required for this. The folding f

with the folding machine according to the invention is thus in the |

can be carried out at the same time as with known folding machines, >.

only with the difference that on a jj according to the invention

Folding machine made booklets immediately by perfect binding jj

can be linked together while those on a $

known folding machine produced booklets by the milling ■ the spine must be specially processed before using the adhesive binding process.

An advantageous embodiment of the folding machine according to the invention is designed according to claim i>. The measures provided in this i advantageous embodiment perforator | is particularly suitable for making rectangular slots with a | considerable width in the folded sheet during its transport |

i to punch from the penultimate to the last folding device. | The three circular knives result in a relatively i simple and very inexpensive construction of the perforating deviceΪ due to the inventive shape of the teeth of the first knife | is achieved that the. short sides of the rectangular slots! be punched out before the adjacent parts of the longitudinal. Sides of the rectangular slots are punched through, so that I the chip to be punched through its lateral connection
is supported with the folded sheets on the periphery of the second and third measure- i sers and so the proper die cutting of these \ short sides of the rectangular slots is possible. [ Here it is advantageous to provide that the facing side surfaces of the edges of the second and third
Round knife lie in mutually parallel planes and thereby
a space laterally bounded by parallel walls for
define the engagement of the first knife and for the removal of the punched chip and that in this chip removal space
an ejector engages which, when the knives are rotated, removes the. ' ejects the punched chip from the chip evacuation area. As a result, | that the chip removal space of the perforating device according to the invention | direction is laterally bounded by parallel walls, the |

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Chip punched out of the folding sheet is held between these two walls and when the second and third are rotated Knife taken so that it is then thrown out of the chip evacuation area with certainty by the ejector, and the punched chips prevent blockages during punching.

The invention is in the following description of exemplary embodiments a folding machine according to the invention and one produced from booklets folded on this folding machine Book explained in detail on the basis of the schematically simplified drawings.

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'Show it:

Fig. 1 is a schematic plan view of the folding machine;

2 and 3 are a side and a front view of the punching device of the folding machine according to FIG Fig. 1 in a greatly enlarged representation;

FIGS. 4, 5 and 6 show details from FIG. 2 in an even further enlarged representation, showing the relative position a tooth of the first knife to the second and third knife when punching a slot in three different Show times;

7, 8 and 9 broken away plan views of a folding sheet with the relative positions of the tooth of the first knife and the second and third knife punch lines generated in FIGS. 4 or 5 and 6;

FIG. 10 shows a section along the line X - X in FIG. 6;

11 is a perspective view of the spine of a broken-away booklet;

Fig. 12 is a perspective view of the spine of a broken-off book;

13 shows a section along the plane X in FIG.

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The combined four-fold folding machine shown in FIG. 1 has, as the first folding device 20, an edging mechanism to which the folded sheet is preferably fed in its longitudinal direction in the inlet direction 21 and is folded to its half with a fold running perpendicular to the inlet direction 21. In the folded-together state in this way, the folded sheet is fed to the second folding device 22, which is designed as a knife-edge folding unit. The broken line 23 indicates ί the lower edge of the folding blade in order to express L in such a way that in this folding device ■ j 'the folding blade is arranged over folding rollers, which in the ■! Drawing are not shown. Below the support surface "- this second folding device 22 is on the right side χ its folding blade, a third folding device 24 is arranged, which is also formed as a knife folder, wherein j of the cutting edge of the folding blade is indicated by a dashed \ line 25. This third folding device 24th : a perforating device 27 is connected downstream in the web leading to a fourth folding device 26. The fourth fold »

Device 26, like the previous folding devices, is designed as a knife-edge folding unit in which the cutting edge of the Folding sword is indicated by a dashed line 28.

A folded sheet entering the first folding device 20 in the infeed direction 21 is made with a folded sheet perpendicular to the infeed direction 21 running fold is folded to half its length and the folding devices one after the other with each leading fold 22, 24 and 26 supplied, the folding sheet in the perforating device 27 with a number of rectangular Slits 29 (Fig. 9) is perforated, which extend with their longitudinal axes along the fold line, along that of the The folding sheet is then folded in the last folding device 26. The folding device 27 described in more detail below is produced here rectangular slots whose width 31 (Fig. 9) is so large > like the thickness- 32 (Fig.11) multiplied by ^ - of the one in the folding machine, In the presented

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presented the case of booklet 33 folded four times. Like the one from Fig. 11 As can be clearly seen, the rectangular slots 29 j in the spine of the booklet form a series of recesses 34, each of which f

I laterally by two to the longitudinal axis of the staple back perpendicular \ extending flat walls 35 and a longitudinal axis of the. | Issue spine parallel concave bottom 36 are limited and its | The opening extends over the entire curvature of the spine of the booklet, k so that the adhesive applied, for example, by means of a known glue wheel can easily penetrate into the recesses 34.

As a result, the inner layers of the folding sheet when folding are folded with a smaller radius of curvature than the respective outer layers, as can be clearly seen from FIG is, there is a fanning of the longitudinal edges of the rectangular slots, so that in the bottom 36 of the recess

30 31 proportionately wide longitudinal edges / the slots / for the coating ·

with an adhesive.

If the walls 35 and the bottom 36 of the recesses 34 of the folding machine according to FIG. 1 become a booklet according to FIG. 11 The folded folding sheet is coated with an adhesive, then this adhesive holds all individual sheets or sheets of the Booklet tightly together, as it is not only on the longitudinal edges / slots that remain free due to the fanning described above 29, but also between the edges in the side walls 35 that form the short sides of the rectangular slots penetrates. The booklet produced in this way can now form a book in its simplest form. Usually the the entire spine of the booklet is coated with an adhesive, so that a band then extends only over the booklet spine or a cover can be attached to the booklet with its spine. In addition, they are in one layer before the last fold The sheets or sheets of the booklet located are connected to one another by the webs 41 remaining between the recesses 34, so that individual leaves cannot fall out.

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In Fig. 12 a book block designated as a whole with 37 is shown / which consists of several, in the folding machine according to Fig.l folded booklet 33 consists. The back of the book block 37 formed by the individual spine is here with a Coated with adhesive, which also penetrates into the recesses 34 of the individual spine. Then it is applied to the spine of the book block a tape 38 is glued on, which holds the booklets 33 together. As a result, not only the individual is affected by the adhesive Sheets or sheets of the booklets, but also the booklets 33 forming the book block 37 are held together. The so through The book block held together by the band 38 already forms a book in its simplest form. He can, however, be known in Be connected to a cover 39 in a manner.

2 to 10, the perforating device 27 of the folding machine according to FIG. 1 is shown in greater detail. How out 2, 3 and 10, this perforating device has three circular knives 42, 43 and 44. The first knife / is arranged on a drive shaft 45 above the path on which the one folded in the third folding device 24 is folded Sheet moved to the fourth folding device 26. The second circular knife 43 and the third circular knife 44 are open a common drive shaft 46 so arranged and fastened that the first knife 42 with its edge into the space engages between the second knife 43 and the third knife 44. The side surfaces 47 facing one another or 48 of the knives 43 or 44 lie in mutually parallel planes and thereby delimit a space 49 for engagement of the eidden knife 42 and for the removal of the punched out Chipes 51. In this chip evacuation space 49 is reached by. inside an ejector fixed in the machine frame one, which is designed as a flat plate, the width of which is 2 * jj "times the thickness of the booklet to be folded Distance between the two side surfaces 47 and 48

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stretches without touching it. The one facing the first knife 42 End face 53 of this ejector 52 forms a floor of the chip removal space 49 and has such an arcuate course, that the depth of the chip removal space 49 in the direction of the circumferential movement of the knives 42, 43 and 44 is constantly up to Zero at point 54 decreases. As a result, this end face 53 of the ejector 52 forms a ramp that between the Side surfaces 47 and 48 of the knives 43 and 44 clamped Chip 51 pushes out of the chip removal space 49 (FIG. 6).

The edge of the first knife 42 engaging in the chip removal space 49 is formed by teeth 55. Each of these teeth is 55 shaped so that it forms a first transverse cutting edge 56 at its leading end when rotating the first knife 42, which when Entry of a folded sheet 57 into the perforating device first touches the folded sheet and thereby touches each individual sheet of the folded sheet makes a cut forming the first short side 58 of the rectangular slot before punching out the long sides 59 of the rectangular slot 29 through the tooth 55 has started. At the trailing end of each tooth 55 is. a nose 61 is provided, which forms a second transverse cutting edge 62 which protrudes so far in front of the lateral edges of the tooth, that they form the second short side 63 of the rectangular slot 29 in each individual sheet of the folding sheet 57 Cut before the punching of the long soaps 59 of the slot is completed.

From the above description of that illustrated in Figs Perforating device results in the following mode of operation of the same. During operation, the knife 42 runs in the direction of the arrow 64 to. At the same time, the knives 43 and 44 rotate together in the direction of arrow 65. The one in the folders Folded sheets 20, 22 and 24 folded three times run after folding in the third folding device 24 between the measuring

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ser, 42 on the one hand and 43 and 44 on the other hand, _t, that along the fourth fold line about which the folded sheet is subsequently to be folded on the fourth folding apparatus 26 57 rectangular slots are punched 29 (Fig. 9) by the circular blade 42. When punching a slot, the first transverse cutter 56 first strikes the folded sheet 57 and creates a first short side 58 of the slot 29

(Fig. 4 and 7)
Cuts In this case, the folded sheet 57 is supported on both sides of the cut by the circumferential surfaces of the second and third knives 43 and 44, so that the part of the first transverse cutter 56 to be punched out cannot escape. The parts of the longitudinal sides 59 of the slot 29 that adjoin the first short side 58 are then punched. However, before this punching of the longitudinal sides 59 is completed, the second transverse cutter 62 hits the folded sheet 57 and produces a cut forming the second short side 63 (FIGS. 5 + 8). In the folded sheet 57, the parts of the folded sheet adjacent to the two ends of these short sides 63 are also connected to one another in the area of the slot to be punched out. . so that the part to be punched out of the second cross-cutting edge cannot escape when this cut is made. Only when the cut by means of the second cross-cutting edge 62 has been made for each individual arc, the adjacent parts of the longitudinal sides 59 of the slot 29 are then formed, so that the chip 51 is then pressed by the tooth 55 into the chip removal space 49, where it is between the side surfaces 47 and 48 is clamped and thereby joins the movement of the knives 43 and 44 in the direction of arrow 65. However, when the knives 43 and 44 continue to rotate, the chip is forced out of the chip evacuation space 49 through the end face 53 of the ejector, so that clogging by chips cannot occur at the punching point.

In that the rectangular slots 29 form a continuous perforation and thus in a row at small intervals follow one another, are created accordingly in each spine

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many recesses 34, so that much more good connection points are created between the arches of the yeast than this is possible with the known wire and thread stitching, which has been confirmed by experiments. Also is through the many recesses 34 in the individual booklets 33 the adhesive-receiving surface of each individual booklet spine and thus a book block 37 composed of several booklets is much larger than with a milled spine, so that this also increases the adhesive absorption.

By regulating the distance between the folded sheets successively introduced into the folding machine, the length of the rectangular Slots 29 can be set in the individual folding sheets. It is useful to ensure that the recesses in the back of the booklets 33, which lie directly on top of one another after they have been compiled to form a book block 37, against one another are offset, as can be seen from FIG. This ensures that the applied to the spine of the book block After adhesive has hardened, the individual booklets 33 not only form a non-positive fit, but also a positive fit forms cohesive body, the parts of which have penetrated the recesses form teeth, which the booklets 33 also hold together mechanically.

The gap width 31 must be at least as large so that the recesses 34 formed from the slots 29 are completely open to the remaining area with adhesive during the last folding and thus the greatest possible fanning of the longitudinal edges 3 <the Schlitzg 29 in the bottom 36 of the recesses 34 is achieved like the thickness of the booklet. In the embodiment shown in Fig. 13, the width 31 of the slots 29 ^ Jf. times greater than the thickness 32 of the booklet. ²

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Claims (10)

* · ■ ■ · for 'PATENTANWÄLTE ·· Dr.-lng. Wolff t H. Bartels Dipi.-Chem. Dr. Brandes Dr.-lng. Held Dipl.-Phys. Wolff D - 7 Stuttgart 1, Lange Strasse Tel. (0711) 29 63 10 and 29 72 Firma Maschinenbau Oppenweiler GmbH., Telex 07 22312 (patwod) <· - ii> -n -i-ir-1-Λ 'j ·. Telegram address: Postfach 1169, 7155 Oppenweiler tlx 0722312 worn Stuttgart PA Dr. Brandes: Headquarters Munich Postscheckkto. Stuttgart 7211-700 BLZ 60010070 Deutsche Bank AG, 14/28630 * 'BLZ 60070070 Falzmaschln e >> Office hours: ^ 9-11.30 a.m., 1.30 p.m.-4 p.m. except Saturdays claims for protection: April 10, 1978 75O8rdb Reg.-Nr. 125 1) Folding machine with several folding devices in which a in the . Folding machine imported folding sheet is successively folded into a booklet, and at least one Perforating device, which is arranged between two folding devices and punches a series of slots in the sheet, which extend along the fold line around which the sheet is folded in the next following folding device, thereby characterized in that the perforating device (27) is arranged at the exit of the penultimate folding device (24) and punching tools (55) for punching rectangular slots (29), the width of which is at least as great as the thickness (32) of the booklet (33) folded in the last folding device (26). 2) folding machine according to claim 1, characterized in that a perforating device (27) is provided which the Slots (29) during the transport of the sheet from the penultimate folding device (24) to the last folding device (26) punches. 3) Folding machine according to claim 1 or 2, characterized in that the perforating device (27) is at least one circular knife (42) is provided with punch teeth (55). Telephone information and orders are only binding after written confirmation 7632000 09/28/78 4) folding machine according to claim 2 or 3, characterized in that at least the last folding device (26) is a knife folding unit to which the folding sheet (57) from the penultimate folding device (24) is parallel to the cutting edge (28) of the folding blade and can thus be fed in the direction of the last fall line. 5) folding machine according to claim 3 or 4, characterized in that the perforating device (27) can be driven from three around their axes Round knives (42, 43, 44), of which the first knife (42) rotatable about a first axis on one side the folded sheet path is arranged and the second and third knife (43, 44) on the other side of the folded sheet path so around a common axis are rotatably arranged that the first The edge of the knife engages between the edges of the second and third knife and that this edge of the first knife (42) is formed by teeth (55), each of which at its leading end when rotating the first knife first cross cutting edge (56) forms the first short side (58) of the rectangular in each individual sheet of the folding sheet Make the cut forming the slot (29) before punching out the long sides (59) of the rectangular slot has started by the tooth, and that a nose (61) is provided at the trailing end of the tooth, the second Cross cutting edge (62) forms which protrudes so far in front of the lateral edges of the tooth that they are in each individual sheet of the folding sheet makes a cut forming the second short side (63) of the rectangular slot before the Punching out the long sides (59) of the slot is complete. 6) folding machine according to claim 5, characterized in that the mutually facing side surfaces (47, 48) of the edges of the second and third circular knives (43, 44) lie in planes parallel to one another and thereby one through the side parallel walls delimited space (49) for the engagement of the first knife and for the removal of the punched-out chip (51) and that in this chip removal space (49) 7632000 09/28/78 Ejector (52) engages, the when turning the knife ejects the punched chip from the chip evacuation space (49). | 7) folding machine according to claim 6, characterized in that
a fixed plate is provided as an ejector (52),
engaging the chip discharge chamber (49) and whose the ER, most blade (42) facing the end face (53) a ramp for \ forms the chip (51). ·? 8) folding machine according to one of claims 5 to 7, characterized in that; characterized in that the distance between the edges of the
second and third knife (43, 44) at least times is the thickness of the thickest booklet to be folded. 7632000 09/28/78