CH640787A5 - Apparatus for the mechanical wrapping of books in dust jackets - Google Patents

Description

The invention relates to a device for mechanically wrapping books in dust jackets, which are conveyed together with the books standing on their backs and in the correct position in the longitudinal direction of the book.

Machines are known for wrapping books in dust jackets according to FRG patent 958.107 and the magazine “Bindereport” 10/77 and 3/78, in which the books are conveyed with the back upwards in discontinuous or continuous movement through the processing stations and the dust jacket is opened the spine is laid on. Controlled mechanisms are provided for driving in the dust jacket flaps around the edges of the book cover and for folding the 5 book covers away from the book block and for folding them up. In addition to the complicated construction of such machines, these disadvantages have accessibility and monitoring options, the correct handling of the cover and, in particular, the book load. Since the books are conveyed either standing on the front cut edges of the book cover or hanging on circumferential sword plates, which have been inserted into the center of the book block, the force of gravity of the books and the force of the elements pressing against the spine to fix the cover either cause an inadmissible deformation in the case of rounded books, or the wedge effect of the sword plate is exerted on the back of the book block, as a result of which its association can be destroyed.

m Machines according to DD-PS 87 301 and DE-PS 2 426 974 are also known, which the books pass through with their backs down. They differ from one another essentially by methods and means for folding the book cover off the book block, for wrapping the dust jacket flaps around the edges of the book cover and for folding the book cover onto the book block, including holding down the cover flaps.

Critical is always the clean folding of the book covers. For this purpose, either swiveling suction plates, which are carried along in the direction of conveyance, are provided, or the book covers are first spread apart from the book block by spatial wedges and folded down by subsequently arranged guide rods inserted into the expanding gap, as in DE-PS 1 103 294. The anyway The great structural outlay for 35 controlled suction plates is further increased by the fact that additional means must be provided to lift the folded-down pages of the book block from the open book covers, which also impairs functional reliability. On the other hand, the insertion of guide elements into the gap between the book cover and the book block formed by expanding wedges can lead to damage to the book and to machine malfunctions, because the fact that even the outer pages of the book block spread at least a little, the spreading gap is very narrow and an accurate position assignment of the expansion gap and the guide element to be introduced is not always guaranteed.

In another known machine, the book is first opened flat by block dividers in the middle, and the gap formed between book covers and outer sheets of the book block as a result of the rigidity of book block spines and paper 50 is used to introduce guide elements for re-erecting or collapsing the two book block halves. Since, especially in the case of freshly made books, a crack either does not form at all or only a small amount when opened, there is also a risk of book damage and malfunctions. Another disadvantage is that it is necessary to provide a guide bar that presses against the back of the book block for lateral bookkeeping; this can destroy the back bandage, especially freshly bound book blocks.

The known technical means for wrapping in the protective flaps either consist of controlled elements which simultaneously effect the knock-in over the entire length of the book, DD-PS 87 301 and DE-PS 958 107, or fixed guide plates are provided and shaped in such a way that they Include a steadily decreasing angle along the conveying direction and thus in connection

3rd

640 787

with the conveying movement of the book, the cover flaps, beginning at the front, continuously fold in, DE-PS 2 224 164 and 1 103 294.

The disadvantages of controlled elements have already been mentioned, while the required shape of guide plates can be achieved only with great effort, for example by driving. Furthermore, the accuracy of the wrapping process, caused solely by baffles, is not always satisfactory.

Another critical operation is to flip the book cover surrounded by the dust jacket against the book block in connection with holding down the dust jacket flaps. In some of the known machines, the book block is first divided and opened in the middle, so that the sheets of one half of the book block lie on the cover flaps and this when the book cover is re-erected, which is done by means of fixed guide rods or controlled flaps, according to DE-PS 2224164 and DE- Hold down PS 1103294. The disadvantages here are the dependence of the hold-down effect on the rigidity of the book block spine and the paper and also here in particular the required guide bar guiding the books laterally within the book block, which exerts the wedge effect on the book block spine already mentioned.

Devices have also become known in which the book block remains closed and the cover flaps are held down by trailing springs arranged along the conveying direction. However, due to the geometric relationships of the web described by the folding book covers, these proved to be insufficiently reliable.

Other known machines are provided with controlled levers or guide pockets which each touch the book cover on both sides, thus holding down the cover flaps and also causing the flip-up movement. The main disadvantage here is the complexity of the structure and the format change.

Overall, the known technical solutions are sometimes complicated in structure and thereby also complicate machine operation, format changeover and function monitoring, and in part they do not meet the procedural requirements with regard to gentle use of the books or functional reliability to the extent that the books produced in flow production are fed directly to the dust jacket can be.

The aim of the invention is a technical solution for the mechanical wrapping of books in dust jackets, which is simple in structure, can be easily converted for different book formats, the technical means of which have a high degree of functional reliability, enable high production speed, ensure gentle handling of the books and can be integrated into existing book production lines.

The object of the invention is to design the operations and technical means required for wrapping the books in dust jackets in such a way that a load which is sufficiently gentle even for fresh, non-deposited books is ensured with little construction and adjustment effort.

According to the invention, this object is achieved by

that uncontrolled means are arranged along the conveying direction of the book and dust jacket, which spread the book covers from the book block, fold them down, fold in the dust jacket flaps around the edges of the book covers, fold the book covers with the folded cover back onto the book block, press the dust jacket flaps against the inner book cover surfaces and the book block keep closed throughout the run.

The technical means are preferably arranged in pairs and are characterized by the fact that they are controlled solely by the conveying movement of the book, therefore they work without clocks, do not require drive mechanisms and can be adapted to the respective book format with little effort, without great adjustment accuracy being required and that , since the book blocks are always kept closed, sufficient stress is achieved even for freshly made books.

Advantageously, the technical means for spreading the book cover from the book block consist of two side plates arranged at a slight incline next to one another at the height of the upper book cover edges, which can deflect upwards independently of one another against adjustable spring force, and a flat, flat wedge is attached to the lower surfaces of each.

While the spreading wedges press against the front upper book cover corners from the inside due to the conveying movement of the book, the rear area of the book is still held together by laterally arranged pressure rollers. As a result, a gap is formed between the cover and the book block near the points of attack of the expanding wedges, into which the cutting edge of a separating wedge, which is firmly connected to the expanding wedges, is inserted and the gap widens as the book moves further. Spreading wedge and separating wedge can be arranged fixed or adjustable to each other and the cutting edge of the separating wedge is advantageously designed so that a secure penetration of the separating wedge is ensured even in very small gap widths. A further advantage over known similar spreading devices is achieved by the inclined arrangement of the thrust plates receiving the spreading wedges, because books which differ or are displaced from the format are thereby processed without problems or, on the other hand, there are large tolerances for the format changeover.

In order to prevent the back, which is still formally unstable in fresh books, from deforming under the pressure of the thrust plates on the book cover, it is expediently held together by support rails or rollers which press against the book folds from the side from the outside.

It is advantageous if, following the separating wedges, vertically arranged support plates laterally support the book block during further conveyance of the book. So that the book block can run in between the support plates without any problems, their leading edges, which are somewhat inclined to the vertical and counter to the conveying direction, are expediently encompassed by the separating wedges, which for this purpose are vertically slit at the blunt end or are provided with corresponding approaches. At the same time, this makes it possible to adjust the thrust plates and the spreading and separating wedges attached to them vertically according to the book width, without having to adjust the guide plates, which can only be adjusted in terms of their spacing from one another according to the book thickness, also in the vertical direction.

For further folding down of the book covers that have been spread apart from the book block and come outside of the guide plates, triangular plates are preferably used which are directed obliquely downwards and outwards, the lower ends of which are designed as sliding shoes for holding down the book covers on the protective cover underneath which is jointly promoted with the book.

The dust jacket flaps are appropriately wrapped around the edges of the book cover along preformed fold lines by means of fixed guide elements that can be adjusted laterally according to the width of the book. The guide elements preferably each consist of a plurality of guide rods, which are shaped and arranged fixed to one another such that the line connecting them perpendicular to the conveying direction is always a straight line,

5

10th

15

20th

25th

30th

35

40

45

50

55

60

65

640 787

4th

which sweeps over a screw surface wound around the drive-in edge. The advantages compared to guide elements, which consist of a correspondingly shaped sheet metal part, are easier to manufacture and more favorable suspension properties. Following the aforementioned guide elements, the turning edges are expediently pressed in by one or more spring-loaded or weight-loaded rollers. The axial directions of these rollers advantageously form an angle of less than 90 ° to the conveying direction. As a result, the rollers exert a pulling force towards the center of the book on the dust jacket flaps. This favors the progressive wrapping of the protective flaps along the wrapping edges.

The subsequent folding up of the book cover to the book block also takes place expediently by means of guide rods which are directed obliquely upwards towards the book block and which, similar to the above-mentioned guide elements for driving in the protective flaps, consist of several round rods which lie in a screw surface of different pitch which is wound around the movement path of the book cover folds. This means that little or no effort is required to adjust to different book formats.

The means for pressing the protective flaps against the inner book cover surfaces when the book covers are folded up advantageously consist of a plurality of flat flaps, preferably made of sheet steel, which are conveniently hinged to elements for lateral guidance of the book block, as close as possible to the book cover folds and in the direction of conveyance. 'device are arranged one behind the other and rest in the rest position with their edges pointing in the conveying direction on the guide rods causing the book covers to flip up, or are held in a suitable manner in a staggered manner in another suitable manner. When the book cover is folded up, it lies down with its dust jacket flaps against the flat flaps and swings them upwards against gravity or spring force, staggered according to the conveying and folding up movements. After the book has been run through, the flat flaps automatically swing back into their starting position. The advantage over known devices for holding down the dust jacket flaps lies in the automatic mode of operation, which does not require a special drive, in a simple structure and reliable function with high performance, and in the omission of additional adjustment work to the respective book format.

The invention is explained in more detail below using an exemplary embodiment. Show it:

Figure 1 is a side view of the portion of a dust jacket incorporating the invention.

FIG. 2 shows a top view of the part of the dust-handling machine according to FIG. 1, which has the invention; FIG.

Figure 3 is a perspective view of the means for spreading the book cover from the book block.

4 shows a perspective view of the means for folding down the book covers and for breaking in the protective flaps; and

Fig. 5 is a perspective view of the means for folding up the book cover and holding down the dust jacket flaps.

1 and 2, a book 1, standing with its back on a conveyor belt or a plate chain 2, is conveyed in continuous motion together with a dust jacket 3 lying flat between book 1 and plate chain 2, shown as a chain line. The protective cover 3 is preformed on the fold-in fold lines 4 (FIGS. 2 and 4) in a suitable manner, for example by means of grooves. Book 1 and dust jacket 3 rest with their trailing edges on a carrier web 5 of the plate chain 2,

while guide elements 6 guide the book laterally and the dust jacket 3 is pressed against the plate chain 2 by the force of gravity of the book 1 and is thereby secured against relative displacements to the book 1. The book 1 first arrives between pressure rollers 7 and bumps with its front book cover corners against the contact surfaces of the contact plates 9 articulated on supports 8, which deflect upwards against the adjustable force of compression springs 10. As can be seen in FIG. 3, when the book 1 is conveyed further, its decorative edges protruding beyond the book block lie against the wedge flanks of the expansion wedges 11 firmly connected to the thrust plates 9 and are pressed outwards, while the pressure rollers 7 following Fig. 1 are also mounted on the carrier 8, still hold the back part of the book 1 together. In the spreading gaps 12 (FIG. 3) thus formed between the book block and book covers, separating wedges 13 located at the rear part of the expanding wedges 11, of which only one is shown in FIG. 3. The cutting edges 13a with the cutting attachment 13b of the separating wedges 13 are shaped in such a way that they penetrate diagonally downwards into the gap 12 from the point of application of the expanding wedges 11, the cutting attachment 13b permitting reliable penetration even into very small gap widths. Support rails 14, which can be fastened to the guide elements 6 (FIG. 1), hold the book spine together against deformation during the spreading of the book cover. The spreading means 7; 9; 10; 11; 13 receiving supports 8 are arranged on longitudinal bars 15, which are shown in FIGS. 1 and 4, to be vertically displaceable and can be adjusted by means of spindles 16 according to the book width, while the longitudinal bars 15, on which, in addition to the carriers 8, the guide elements 6 and other elements for opening and closing the book cover are attached, can be adjusted laterally in opposite directions according to the book thickness.

The separating wedges 13 are each provided on their rear part with a vertically running guide slot 13c, into which the front edges of support plates 17 protrude according to FIGS. 3 and 4. As a result of this and because of the inclined position of the front edges of the support plates 17 against the vertical, the book 1 gets between the support plates 17 during further conveyance without individual sheets of the book 1 being able to be compressed. The book covers are located outside of the support plates 17 and, when the book 1 is conveyed further, they fold under the force of gravity and through the action of triangular plates 17a shown in FIG. 4, which consist of the piece with the support plates 17 and whose edges are directed obliquely downwards outwards are not shown, rounded down and are held down by the ends of the triangular sheets 17a designed as sliding shoes 17b against the dust jacket 3. The support plates 17 are by struts 18; 19 attached to the longitudinal bars 15, easily removable due to good accessibility, so that the support plates 17 and guide elements 20, which are also attached to the longitudinal bars 15 (FIGS. 1 and 4) and the book block 1 support laterally in its further promotion, none need special effort when setting according to the book block thickness, while a vertical adjustability according to the book width is not required.

As shown in Fig. 4, guide rods 21 are attached to strips 22, which can be adjusted transversely in grooves 23 of a machine table 24 in accordance with the book format, and are arranged with respect to one another such that the front edges of the dust jacket flaps rest against the guide rods 21 and the dust jacket flaps accordingly the conveying movement of book 1 and dust jacket 3 along the fold line 4 around the book cover. The free ends of the guide rods 21 act as resilient hold-down devices. The dust jacket 3 on both sides of the book

5

10th

15

20th

25th

30th

35

40

45

50

55

60

65

5

640 787

1 receiving surfaces of the machine table 24 can lie in one plane or stand in a v-shape to each other. On the strips 22 a bearing block 25 is also attached, on which a roller lever 26 with a roller 27 is vertically pivoted. The roller lever 26 is shaped in such a way that the axis of the roller 27 takes an angle of less than 90 ° to the conveying direction and the roller 27, following the guide rods 21, presses from above against the fold-in fold line 4 of the dust jacket 3 under gravity or spring force.

In connection with the conveying movement of the book 1, the guide rods 28 which bring about the folding of the book covers and which are arranged according to FIG. 5 in a screw surface preferably have a circular cross section and are fastened to struts 29 which, as shown in FIG. 1, are firmly connected to the longitudinal bars 15 are. The free lower ends of the guide rods 28 protrude into a groove 30 of the machine table 24 and thus enable the required free lateral mobility of the ends of the guide rods 28 when the longitudinal bars 15 are set to book block thickness, without the book covers being able to get caught on them. As FIG. 5 also shows, flat flaps 31 are articulated on the lower guide elements 20, for example in hinge joints, not shown, and are arranged closely one behind the other in the conveying direction. The flat flaps 31, which rest in the rest position with their edges pointing in the conveying direction on the guide rods 28, come into contact with the protective flap flaps wrapped around the book cover, press them under gravity or in a manner not shown by spring force against the inner surfaces of the Cover and swing up with them. Since in this case vertical "> upward forces are transmitted to the book 1, a support bar 32 is arranged just above the book block to prevent the book 1 from lifting off from the plate chain 2. The guide elements 20, which are tapered at their ends, cause that the book cover 15 can slide over these ends without damage and can rest against the book block.

The book block always remains closed during the entire passage through the dust jacket.

In the further work sequence, guide and conveying elements (not shown) take over book 1 and lead it to a delivery station or a packaging machine.

v

2 sheets of drawings

Claims (7)

640 787 1. Device for mechanically wrapping books in dust jackets, which are conveyed together with the books standing on their backs and in the correct position in relation to them in the longitudinal direction of the book, characterized in that uncontrolled means {1. Along the conveying direction of book (1) and dust jacket (3) , 9, 11, 13, 17, 21, 27, 28, 31) are arranged, which spread the book covers from the book block, fold them down, fold in the dust jacket flaps around the edges of the book cover, the book covers with folded dust jacket (3) back to the book block fold it up, press the dust jacket flaps against the inner book cover surfaces and keep the book block closed during the entire run. 2. Apparatus according to claim 1, characterized in that the, the book cover from the book block spreading means of two slightly inclined and vertically movable in the conveying direction and arranged independently of each other on the front book cover corners pressing start plates (9) and one on each stop plate (9) there are flat expansion wedges (11) with a separating wedge (13) attached to them and that lateral pressure rollers (7) are arranged in front of the expansion wedges (11). 2nd PATENT CLAIMS 3. Device according to claims 1 and 2, characterized in that the spreading means (7, 9, 11, 13) are arranged in pairs on supports (8) and can be adjusted laterally and vertically according to the book format. 4. The device according to claim 1, characterized in that the means which fold down the book cover from the book block on both sides leading support plates (17) and obliquely downward and outward triangular plates (17a), the ends of which are designed as slide shoes (17b) holding down the book cover are. 5. Devices according to claims 1, 2 and 4, characterized in that the inlet edges of the support plates (17) are chamfered downwards in the conveying direction and protrude into vertical guide slots (13c) of the separating wedges (13). 6. The device according to claim 1, characterized in that the means for turning in the protective flaps around the book cover edges consist of paired guide rods (21) which are fastened to strips (22) adjustable transversely to the conveying direction and wound around the fold-in fold lines (4) Screw surfaces lie and that pressure rollers (27) are then arranged to press against the fold-in fold lines (4) of the dust jacket (3), the axial direction of which forms an angle of less than 90 ° to the conveying direction. 7. The device according to claim 1, characterized in that the means for folding the book cover to the book block consist of guide rods (28) which are arranged in pairs in screw surfaces wound around the path of movement of the book cover folds and that for pressing the dust cover (3) against the inner book cover surfaces a plurality of flat flaps (31) are hinged one behind the other, vertically pivotably, above the movement path of the book cover folds on lower guide elements (20).