EP0453791B1 - Buckle folder with insert supplying devices - Google Patents

Abstract

In a buckle folder with at least two folding points (F1, F2) formed in each case by a folding-roller pair (W1/W2; W2/W3), and a draw-in device which consists of two advance rollers (T1, T2) and which defines the advance speed for the material to be folded, the draw-in device lies in an advance path (4) running past the first folding point (F1). Arranged directed towards the first folding point are two insert supplying devices, a first behind and a second in front of the draw-in device. In order that an insert can be inserted alternatively into the first or into the second fold, the first folding point (F1) is assigned a knife-like deflection member (6) which can be moved towards the first folding point (F1) with simultaneously fold-forming deflection of the material to be folded and individually actuated for each folding process by an electronic control device (21). Directly in front of the folding pocket (25) lying between the first and the second folding point (F2), there is arranged as second deflection member (26) an electromagnetically controllable deflector for the material to be folded, which, after the material to be folded has run into the folding pocket (25), can be moved out of its rest position towards the second folding point (F2) with simultaneously fold-forming deflection of the material to be folded (43, 55). <IMAGE>

Description

The invention relates to an upset folding machine with at least two folding points, each formed by a pair of folding rollers, a feed device for the folded material which determines the forward speed and which consists of two feed rollers and which lies in a leading path provided with a forwarding limiting device which leads past the first folding location, one behind the feeding device the first fold point directed insert feed device and a fold pocket with a paper stop is arranged behind the first fold point.

The known upset folding machines with insert feeding devices are each equipped with two folding pockets and set so that they produce a folded fold. The paper deflectors that are common in upset folding machines, with which the inlet openings of the two folding pockets can be closed and the folded material is guided past a folding pocket to the next folding point, are not available in such upset folding machines provided with insert feeding devices. They are not required because only the double-fold type is used.

On the other hand, however, it is also only possible to add inserts in the first fold of the folded goods, because a direct deflection of the folded goods from the first fold to the second fold is not possible due to the lack of a paper deflector. In addition, only one insert inserting device can be provided in such edging folding machines, which is aimed directly at the first folding point, which means that only a single insert can be added to a sheet of folded goods.

A pocketless paper folding machine is already known (DE 38 30 656 C1), in which a stop-free advance limiting device, which determines the respective folding length and which is determined by a folding point and which leads to a folding point, is arranged, which is controlled by a microprocessor and an electronic control device as a function of a forward measuring device for everyone Folding process can be actuated individually and in which the folding material is deflected towards the folding points by knife-like or rod-shaped deflection elements at a speed corresponding to the feeding of the folding material.

However, this known paper folding machine is not provided with an inserting device.

In addition, a folding machine provided with two folding points and two folding pockets is known (DE 38 40 856 A1), in which a sheet guiding element driven by a linear motor and controlled by an electronic control is arranged between the first and second folding points. However, this folding machine also has no attachment device, which is why the sheet guide element is only used to determine the type of fold.

The invention is based on the object of designing an upset folding machine with an insert feed device of the type mentioned in such a way that different inserts can be inserted individually or together in the first and / or second fold of the folded material according to an inputable program.

This object is achieved according to the invention in that a second insert feeding device is arranged in front of the feed device, the inserts of the first folding point being fed from a knife-like deflecting element to a stop-free advance limiting device which can be moved towards the first folding point at a speed corresponding to the feed of the folding material while at the same time folding the deflection of the folding material and by an electronic control device depending on a flow measuring device can be actuated individually for each folding process, and that for the direct feeding of the inserts to the second folding point directly in front of the folding pocket, an electromagnetically controllable fold deflector is arranged as a second deflecting element, which deflector of the folded material from a folded-in deflector of the folded material after a run-in the folded material and the inserts in the non-influencing rest position can be moved towards the second folding point.

A folding machine equipped in this way solves the task with simple means. Their usability is significantly more variable than that of the known upset folding machines of the generic type. In addition, a high level of functional reliability and working speed is guaranteed. By using the knife-like deflection element instead of the otherwise usual folding pocket in front of the first folding point, it is possible to arrange the second insert feed device in front of the feed device.

The inserts to be added optionally from the second insert feeding device can be added during the folding process in addition to the inserts from the first insert feeding device, for example directed towards the first folding point, or instead of the inserts from the first insert feeding device.

The embodiment of the invention according to claim 2 ensures in a simple manner that the inserts fed from the second insert feed device arranged in front of the feeder device are guided directly from the feeder device to the first folding point, it making sense to keep the deflection member in the deflection position for so long until the last third of the folded material has reached the first folding point, so that an insert fed from the second insert feed device to the second fold is reliably grasped by the two folding rollers forming the first folding point.

The embodiment according to claim 3 contributes significantly to the functional reliability with regard to the insert separation and also to increasing the speed of work.

Due to the configuration according to claim 4, the upset folding machine can be programmed in a simple manner both with regard to the folded material format and with regard to the addition of supplements.

The refinements according to claims 5 and 6 contribute to increasing functional reliability and working speed.

Fig. 1

in schematisch vereinfachter Darstellung in Seitenansicht eine Falzmaschine mit zwei Beilagenzuführeinrichtungen;

Fig. 2

die gleiche Darstellung wie Fig. 1 nur in einer anderen Funktionslage des Auslenkorgans;

Fig. 3

eine Teilansicht III aus Fig. 1;

Fig. 4

ein hinter der ersten Falzstelle angeordnetes zweites Auslenkorgan in Draufsicht;

Fig. 5 und 6

die Vereinzelungsvorrichtungen der beiden Beilagenzuführeinrichtungen der Fig. 1 und 2;

Fig. 7

in vereinfachter Darstellung eine Schaltungsanordnung;

Fig. 8

einen Teilschnitt II-II aus Fig. 1;

Fig. 9

eine Ansicht IX aus Fig. 8;

Fig. 10

schematisch einen teilweise entfalteten, gefalzten Falzgutbogen;

Fig. 10a, 10b und 10c

schematisch verschiedene Funktionsphasen der Falzmaschine;

Fig. 10d

einen gefalzten Falzgutbogen mit eingelegter Beilage;

Fig. 11

einen teilweise entfalteten, gefalzten Falzgutbogen mit eingelegter Beilage;

Fig. 11a , 11b und 11c

in schematischer Darstellung verschiedene Funktionsphasen der Falzmaschine;

Fig. 11d

einen gefalzten Falzgutbogen mit Beilage;

Fig. 12

einen anderen teilweise entfalteten, gefalzten Falzgutbogen mit einer anderen Beilage;

Fig. 12a

den Falzgutbogen der Fig. 12 in gefalztem Zustand mit Beilage.

An exemplary embodiment of the invention is explained in more detail below with reference to the drawing. It shows:

Fig. 1

in a schematically simplified representation in side view of a folding machine with two insert feeding devices;

Fig. 2

the same representation as Figure 1 only in a different functional position of the deflection.

Fig. 3

a partial view III of Fig. 1;

Fig. 4

a second deflection element arranged behind the first fold point in plan view;

5 and 6

the separating devices of the two supplement feeders of FIGS. 1 and 2;

Fig. 7

in a simplified representation a circuit arrangement;

Fig. 8

a partial section II-II of Fig. 1;

Fig. 9

a view IX of Fig. 8;

Fig. 10

schematically a partially unfolded, folded sheet of folded goods;

10a, 10b and 10c

schematically different functional phases of the folding machine;

Fig. 10d

a folded sheet of folded goods with an inserted insert;

Fig. 11

a partially unfolded, folded sheet of folded goods with an inserted insert;

11a, 11b and 11c

various functional phases of the folding machine in a schematic representation;

Fig. 11d

a folded sheet of folded goods with an insert;

Fig. 12

another partially unfolded, folded sheet of folded goods with a different insert;

Fig. 12a

the folded sheet of FIG. 12 in the folded state with an insert.

In the schematically shown in FIGS. 1 to 9 Folding machine are arranged in a frame 2 consisting of two plates 1 three folding rollers W1, W2 and W3 so that their axes A1, A2 and A3 lie in the corners of a right-angled, isosceles triangle or in a horizontal plane E1 and in a vertical plane E2 and that they each form a first fold point F1 and a fold point F2 in pairs, in which the lateral surfaces of the folding rollers W1 and W2 or W2 and W3 touch. For the supply of the folded material, two feed rollers T1 and T2 form a feed point E which lies at the height of a horizontal paper guide 3. In the direction of flow behind the second folding point F2, two further transport roller or transport rollers T3 and T4 are arranged, which together form an output point A, through which the folded material leaves the folding machine again.

The paper guide 3 with the feed point E is arranged so that the incoming folding material passes approximately tangentially via the first folding roller W1 past the first fold point F1 onto a second paper guide 3 ', which lies in the same horizontal plane as the feed point E, so that it together with this forms the leading path 4, indicated by a dash-dotted line and passing the first fold point F1.

On the side of the advance path 4 opposite the folding point F1, a knife-like deflection element 6, which extends over the entire length of the folding point 1 or the folding rollers W1 and W2, is arranged, which on two each two-arm pivot levers 7 is attached. The knife-like deflection element 6 consists of a bent sheet metal part, and it has a rear guide web 5, which is directed against the feed point E and in the deflection position shown in FIG. 2 protrudes through the leading path 4 at an angle. The pivot levers 7 are in turn arranged on a common shaft 8 so that they are axially outside the two end faces of the folding roller W 1 and can thus be pivoted past it. The shaft 8 is mounted eccentrically to the axis A1 of the folding roller W1 below the advance path 4 between the folding roller W1 and the feed point E in the frame 2. For pivoting the pivot lever 7, two cam disks 10 are provided which are fastened on a shaft 9 mounted below the folding roller W1 and which have a single-speed clutch 14, which can be designed, for example, as a wrap spring clutch and can be brought into gear connection with the folding roller W1 at times via gears 15 and 16 . On the lateral surfaces of these cams 10 there are contact rollers 11 of a second lever arm 12 of the pivot lever 7, on each of which a tension spring 13 engages in the corresponding direction. The curve shape of the cams is designed in such a way that the deflection element 6 moves in synchronism between the cams 10 and the folding roller W1 at the forward speed of the folded material against the first folding point F1 and this feeds the folded material to form the fold.

The respective engagement of the one-way clutch 14 takes place by means of a pawl 17, which is actuated by an electromagnet 18 and, in its rest position, engages in a locking manner under a locking shoulder 19 of a control ring 20 of the one-way clutch 14. If the electromagnet 18 is briefly energized, the pawl 17 releases the control ring for one rotation of the shaft 9 with the cams 10. The timely excitation of the electromagnet 18 is controlled by an electronic control device or with the aid of a microprocessor 21 as a function of a flow measuring device, not shown here. This flow measurement device includes a light barrier 22 in the flow path 4 and a pulse generator 23, both of which are connected to the microprocessor 21, by which the electromagnet 18 is controlled.
The pulse generator 23 is synchronized with the folding rollers W1, W2, W3 or with the feed rollers T1, T2 and supplies 21 counting pulses to a programmable coincidence circuit of the microprocessor, the number of which represents a measure of the lead length.
In addition, the microprocessor 21 or its coincidence circuit can be programmed and adjusted with the aid of an input keyboard 24 so that different fold lengths and different sheet lengths or different lead lengths can be set, depending on which the microprocessor 21 can address the electromagnet 18 in the event of coincidence.

Below the first fold point F1 is immediately in front A second deflecting element 26 in the form of a paper deflector is arranged in the fold pocket 25 assigned to this fold point F1. This deflection member 26 is fastened to two pivot levers 27 of a shaft 26 'mounted in the frame 2 parallel to the folding rollers W1, W2, W3 and via an intermediate lever 28 by an electromagnet 29 from the rest position shown in FIGS 10c and 11c can be pivoted shown. In this swivel position, sheets of sheets and inserts arriving from the first folding point F1 can be directed past the folding pocket 25 directly to the second folding point F2. The intermediate lever 28 is pivotally mounted on a fixed bearing journal 30 and in each case articulatedly connected to one of the pivot levers 27 and the armature 31 of the electromagnet 29.
The electromagnet 29 is also controlled by the microprocessor 21 according to the predetermined program.

Above the infeed path 4, two essentially identical insert feeders 32 and 32 'are arranged, each of which consists of a waiting station 33, 33' and a separating device 34, 34 'shown in FIGS. 5 and 6 and which are also controlled by the microprocessor 21 be that individual inserts from a feeder 36 or 36 'are fed into the waiting station 33 or 33' and from there through the feed rollers 37, 38 or 37 ', 38' of the folding machine. Both the separating devices 34 and 34 ', also the feed rollers 37, 38 and 37 ', 38', like the shaft 9 of the cam flanges 10, are driven via electromagnetically actuated clutches, the electromagnets 39, 40 and 41, 42 of which are controlled by the microprocessor 21 according to the program.
The feed rollers preferably have a somewhat higher conveying speed than the feed rollers T1, T2 or the folding rollers W1, W2, W3.
The waiting stations 33 and 33 'each have sheet guiding shafts 35 and 35', respectively, which are directed obliquely towards the advance path 4. The arrangement is such that the sheet guide shaft 35 of the first insert feed device 32 is directed directly at the first folding point F1 behind the feed rollers T1, T2 of the feeder device, while the sheet guide shaft 35 'of the second insert feed device 32' is arranged in front of the feed rollers T1 and T2 and is aimed directly at the collection point E.

As will be explained in more detail below, with the machine described and with the aid of the two insert feed devices 32 and 32 ', e.g. the fold types shown schematically in FIGS. 10d, 11d and 12a are carried out with supplements.

FIG. 10 shows a fold sheet 43 which has already been folded twice in the manner of a wrap fold and partially opened again, the middle part 44 of which is provided with a viewing window 45. Through this window 45 should in the folded state, for example, the address field 46, which is arranged on the inside of the lower arch section 47, can be seen from the outside.
While the lower arch section 47 is provided with adhesive strips 48 only along its side edges, the upper arch section 49 has glue strips 48 both along the side edges and along the transverse edge. The inside surface of the entire arch can be labeled.

In order to fold the folded sheet 43 in the manner of a wrap fold shown in FIGS. 10 and 10d and at the same time insert an insert 50 between the sheet section 47 and the sheet section 49 during the folding process, the following processes take place on the machine:

The not yet folded paper sheet 43 runs in the advance path 4 into the position shown in FIG. 10a. The folds 51 and 52 to be produced are indicated on the fold sheet 43 by small transverse lines. When the sheet of folded material 43 has advanced so far in the advance path 4 that the first fold 51 to be formed lies approximately above the fold point F1, the pivot lever 7 with the deflection element 6 is actuated by the cam disks 10 rotating once so that the exact position, at which the fold 51 is to occur, enters the fold point F1, as is shown in FIG. 10b. The fold 51 formed in the fold point F1 then runs with the two adjoining arc sections 44 and 47 into the fold pocket 25 a. During this, an insert 50 is supplied from the waiting station 33 to the first insert feed device 32 by appropriate excitation of the electromagnet 41 from the feed rollers 37 and 38 in such a way that it arrives approximately simultaneously with the fold 52 or a little later in the fold point F1. As soon as the fold 51 has reached the stop of the fold pocket 25, the second deflecting element 26 is suddenly pivoted against the fold point F2, so that the fold 52 is guided together with the insert 50 into the fold point F2, and there is the one shown schematically in FIG. 10d Folded goods form with insert 50 inserted.

Because in this case the insert 50 was added from the sheet guide shaft 35 directed directly to the folding point F1, the deflecting member 6 was able to return to the one shown in FIGS. 10a and 10b immediately after reaching its deepest deflecting position, which is shown in FIG. 10b Return to the starting position.

If, on the other hand, the insert 50 from the sheet guide shaft 35 'should have been fed to the second insert feed device 32', the deflecting member 6 would have had to remain in the position shown in FIG. 10b until the insert 50 caught the front edge of the folding point F1 would have been. In this case, the guide bar 5 is provided on the deflection element 6. Its job is to remove the inserts from the pre-feed path from the second insert feeder 32 ' 4 to the fold point F1, as shown in Fig. 11b.

11, the viewing window 45 is attached in the upper sheet section 49 and the address field 46, which should be read through this viewing window 45 in the folded state, on the outside of the lower sheet section 47. The one-dot-dash line in FIG In this case, the insert 50 drawn in lines should already be added to the first fold 51 so that in the final state it comes to lie between the middle sheet section 44 and the lower sheet section 47, as shown in FIG. 11d.

As can be seen from FIG. 11a, in this case the insert 50 is fed from the second insert feed device 32 'in such a way that its front edge with the fold 51 reaches the fold point F1, when the first fold 51 is formed it passes between the two sheet sections 44 and 47 and also runs into the folding pocket 25 between these two arc sections 44, 47. When this has been done, the deflection member 26 is pivoted back into its deflection position shown in FIG. 11c, so that the sheet of folded material 43 is deflected towards the second fold point F2 to form the second fold 52 and finally the end product shown in FIG. 11d is formed Wrapped fold, in which the insert 50 is added in the first fold 51.

While the inserts 50 have a format which corresponds to approximately one third of the unfolded folded sheet format, it is also possible to add inserts whose format corresponds to a two-thirds format of the folded sheet. Such an insert 54 is shown together with a sheet of folded goods 55 in FIGS. 12 and 12a. In the case of the folded sheet 55, the viewing window is arranged in the lower sheet section 47 and the address field 46 on the outside of the upper sheet section 49. When this sheet 55 is folded, the insert 54 is fed from the second insert feed device 32 'such that the front edge of the insert 54 in the Proximity of the fold 52 lies and that it is folded in half when the first fold 51 is formed in the fold point F1. In this case, however, the sheet of folded goods 55 is inserted into the feed point E in such a way that the lower sheet section 47 precedes and not, as in the examples above, the sheet section 49. Then the sheet of folded goods 55, as described above, is passed through together with the insert 54 the swiveling deflecting element 6 is deflected into the first folding point F1, so that in this case the folded material sections 44 and 49 enter the folding pocket 25 and the folded insert 54 comes to lie between these two sheet sections 44 and 49. This is followed by a corresponding deflection of the deflecting member 26, the second fold in the fold point F2 and the end product shown in Fig. 12a schematically shown folded goods with inserted insert 54th

By appropriate programming of the microprocessor 21 using the input keyboard 24, it is also possible to add one insert from the two insert feed devices 32 and 32 'to one and the same fold sheet 43 or 55 such that one insert in the first fold 51 and the other Insert in the second fold 52 lies. Of course, this only makes sense if the two insert feed devices 32, 32 'contain different supplements.

In addition, it is also possible to produce a Z-shaped or a zigzag fold with the compression folding machine described instead of a winding fold. The microprocessor 21 can also be easily programmed in such a fold type.

Claims (6)

1. Compression folding machine with at least two folding points (F1, F2) each formed by a pair of folding rollers (W1, W2, W3), a draw-in device for the folding material comprising two feed rollers (T1, T2), said draw-in device determining the forward speed and being located in a forward movement path (4) leading past the first folding point and provided with a forward movement restriction means, wherein a shim feed device directed towards said first folding point is arranged behind said draw-in device and a fold cavity with a paper stop is arranged behind said first folding point, characterised in that a second shim feed device (32') is arranged in front of said draw-in device, the shims of which are fed to said first folding point (F1) by a blade-like deflection means (6) of a forward movement restriction means without a stop, said deflection means (6) may be moved towards said first folding point (F1) while at the same time deflecting the folding material (43, 55) to form folds at a speed corresponding to the forward movement of said folding material, and for each folding process may be operated individually by an electronic control device (21) in association with a forward movement measuring device; and that for direct feed of the shims to the second folding point (F2), an electromagnetically controlled deflector is provided directly in front of said fold cavity (25) as a second deflection means (26) for the folding material and said deflector may be moved out of a resting position, which does not affect the folding material (43, 55) and the shims, towards said second folding point (F2) after said folding material (43, 55) has run into said fold cavity (25) while at the same time deflecting said folding material (43, 55) so as to form a fold.
2. Compression folding machine according to Claim 1, characterised in that the deflection means (6) comprises a curved baffle plate and is provided with a guide web (5) on its rear side directed towards the draw-in device, said guide web (5) projecting obliquely through the forward movement path (4) when said deflection means (6) is in the deflection position.
3. Compression folding machine according to Claim 1 or 2, characterised in that the shim feed devices (32, 32') each have a feeder (36, 36') with a separator device (34, 34') as well as a stand-by station (33, 33') with a pair of feed rollers (37, 38, 37', 38') activated by the electronic control device (21).
4. Compression folding machine according to either of Claims 1 or 3, characterised in that the electronic control device comprises a microprocessor (21), and that the forward movement measuring device has a pulse generator (23) synchronised with the forward movement of the folding material and a coincidence circuit which may be set in advance.
5. Compression folding machine according to Claim 3, characterised in that the pair of feed rollers (37, 38, 37', 38') may be coupled to a drive synchronised to the forward movement of the folding material by an electromagnetically operated coupling.
6. Compression folding machine according to Claim 3 or 5, characterised in that the feed speed of the pair of feed rollers (37, 38, 37', 38') is higher than that of the forward movement of the folding material.

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