EP0157349B1 - Pocket-folding machine with a protection cover - Google Patents

Abstract

1. Pocket folding machine comprising, mounted in a roll stand (1) and jointly driven by an electric motor (4), two pairs of folding rollers (W1, W2, W3, W4) and, mounted at staggered heights on opposite sides of the roll stand (1), two folding pockets (5, 6) having manually adjustable abutments (65, 66) for the stock which is to be folded, the roll stand (1) and the folding pockets (5, 6) being enclosed by sound-preventive housing parts (8, 9), which form an inlet aperture (51) on one side of the roll stand and an outlet aperture (17, 17/1) on the opposite side of the roll stand, characterised in that - a housing (7) is provided which encloses jointly and on all sides both the roll stand (1) and the folding pockets (5, 6), the said housing (7) comprising two separably and/or articulatingly connected parts, namely a base part (8) and a cover part (9), - the base part (8) comprises between two bottoms (10, 11) extending directly under the two folding pockets (5, 6) and at least approximately parallel with them, and two lateral vertical walls (15, 16), a shaft-like recess (12) to accommodate the roll stand (1), - and in that the cover part (9) comprises between two vertical side walls (40, 41) a first cover wall (45) which masks the upper folding pocket (5) and which has a wall portion (48) extending towards the inlet aperture (51), and a second cover wall (54, 54') located under the bottom folding pocket (6) and leading to the under side of the inlet aperture (51), and an end wall (39, 39') located under the second cover wall (54), and in that - the lines of separation (94, 97) of the vertical housing walls (15, 15', 16, 16', 40, 41) extend at least partly into the vicinity of the folding pocket planes.

Description

The invention relates to an upset folding machine with two folding roller pairs mounted in a roller frame, jointly driven by an electric motor, and two folding pockets which are offset in height on opposite sides of the roller frame and which have manually adjustable folding material stops and in which the roller frame and the folding pockets are surrounded by noise-protecting housing parts, which form an inlet opening on one roller frame side and an outlet opening on the opposite roller frame side.

Upsizing machines of this type are known per se (DE-PS-30 25 239, DE-PS-30 27 344). In the case of upset folding machines for large-sized folded goods in particular, multi-part hood-like housing parts are provided as soundproofing devices, which cover the upper machine parts or envelop the lower machine half in the form of a trough. Even with smaller folding machines, it is already known, for the purpose of protection against the noise that such machines generate during operation, hood and bag-like, made of sound-absorbing or sound-absorbing substances, such as. B. made of rigid foam, to use existing coverings, which are pushed in particular over the folding pockets and placed over the middle part of the machine.

In addition to the fact that the production of these multi-part soundproofing parts is complex, these parts must be removed individually from the machine when setting the folding pocket stops and then re-attached to the machine, which is not only time-consuming but also entails the risk that the Parts will be damaged. The same cumbersome handling results for the known upset folding machines of the type mentioned at the outset, even in the event of malfunctions, for example in the event of a paper jam.

The invention is therefore based on the object of creating an edging folding machine of the type mentioned at the outset which avoids these disadvantages and in which, in particular, the soundproofing means as a housing are easier to produce, easier to handle and more effective to use and which are also more favorable in terms of assembly technology.

• - daß ein beide das Walzengestell und die Falztaschen gemeinsam und allseitig umschließendes Gehäuse vorgesehen ist, daß aus zwei lösbar und/oder gelenkig miteinader verbundenen Teilen, nämlich einem Sockelteil und einem Deckelteil besteht,
• - daß der Sockelteil zwischen zwei unmittelbar unter den beiden Falztaschen und wenigstens annähernd parallel zu diesen verlaufenden Böden und zwei seitlichen Vertikalwänden eine schachtartige Ausnehmung zur Aufnahme des Walzengestells aufweist,
• - daß der Deckelteil zwischen zwei vertikalen Seitenwänden eine erste die obere Falztasche abdeckende Deckelwand mit einem zur Einlauföffnung hin verlaufenden Wandabschnitt sowie eine über der unteren Falztasche liegenden, zur Unterseite der Einlauföffnung hin führende zweite Deckelwand und eine unter der zweiten Deckelwand liegende Stirnwand aufweist und
• - daß die Trennlinien der vertikalen Gehäusewände zumindest teilweise in der Nähe der Falztaschenebenen verlaufen.

This task is solved by

• that a housing enclosing both the roller frame and the folding pockets and provided on all sides is provided that consists of two parts which are detachably and / or articulatedly connected, namely a base part and a cover part,
• that the base part has a shaft-like recess for receiving the roller frame between two immediately below the two folding pockets and at least approximately parallel to these floors and two lateral vertical walls,
• - That the cover part between two vertical side walls has a first cover wall covering the upper fold pocket with a wall section running towards the inlet opening and a second cover wall lying above the lower fold pocket leading to the underside of the inlet opening and a front wall lying under the second cover wall and
• - That the dividing lines of the vertical housing walls run at least partially in the vicinity of the folding pocket levels.

Such a buckle folding machine has the advantage over the conventional buckle folding machines of the type mentioned at the outset that the entire soundproofing means consist of only a two-part compact housing, in which the roller frame with the two folding pockets can be accommodated or fastened in a simple manner in a functional manner and in which the possibility is given to expose both the two folding pockets and the roller frame with the two pairs of folding rollers in a simple manner if this is necessary.

Characterized in that the cover part is hingedly connected to an underlying end wall section of the base part by a hinge arranged on the lower edge of its end wall, the closed housing can be opened and closed again very easily by opening the cover.

Another important embodiment is that the wall sections of the two housing parts delimiting the inlet opening and the outlet opening each run or end in the vicinity of the circumference of a folding roller or a transport roller. This ensures that as little noise as possible can penetrate from the inside of the housing through the indispensable inlet and outlet openings, the rollers, which are preferably provided with a rubber or foam jacket, being advantageously included in the soundproofing function at the same time. However, it is not absolutely necessary for the rollers in question to which the wall elements are brought to have a rubber or foam jacket.

A further advantageous embodiment consists in that the second cover wall is arranged "rising from the inlet opening to the outside" and forms the base for a feed table that slopes away towards the inlet opening, in a further embodiment it is advantageous if the second cover wall is simultaneously with a trough-like recess is provided for receiving a sheet feeder. This also gives the possibility of using a sheet separating device or a sheet feeder, which feeds the bottom sheets of a sheet stack in succession and which is therefore arranged below the level of the feed table got to.

A particularly good dimensional stability of the base part can be achieved in that the two folding pockets and the two bottoms arranged immediately below have at least approximately the same inclinations, the upper folding pocket rising from the roller frame and the second, lower folding pocket one from the roller frame assume a sloping position on the outside.

As a result, an approximately symmetrical cross-sectional shape is also created with respect to the vertical center plane of the roller frame and, moreover, sufficient space is provided below the upper folding pocket for accommodating a deposit table or a folded goods transport path.

The fact that the outlet opening is located in an end wall of the shaft-like recess of the base part adjoining the bottom arranged under the first folding pocket has the advantage that the outlet opening is at the same time arranged in the immediate vicinity of the roller frame, so that the folded material from the last folding point to has to travel only a very short distance to the outlet opening, for example to get to a storage table or a transport track located outside the outlet opening.

In order on the one hand to keep the spout as small as possible and on the other hand to be able to mount it in the immediate vicinity of the last fold point, it is provided in a further embodiment that the end wall of the shaft-like recess of the base part to form the spout has two obliquely inwardly directed wall sections has, which end in the immediate vicinity of the lateral surfaces of the two folding rollers, which form the last fold in the direction of travel.

While it may be necessary to arrange a third pair of rollers between the outlet opening and the last fold point without the inwardly facing wall sections, this pair of transport rollers can be saved in the embodiment described above.

In a further embodiment, a fold material conveying path is arranged below the outlet opening below the outlet opening, under which a housing base running parallel to it is located.

It is also common in known upset folding machines to arrange a transport path next to the outlet opening. In these known upset folding machines, however, these transport tracks are generally outside the actual housing contour. Due to the proposed design and arrangement, however, the transport path is arranged directly under the bottom of the first folding pocket and thus within the outer housing contour.

In order to be able to more easily remedy or eliminate malfunctions, in particular paper jams in the folding pockets, it is provided in a further embodiment that the folding pockets each consist of two bar grids arranged one above the other at a distance, between which a stop rail is longitudinally adjustable and which can be detached and / or opened are interconnected.

It can be provided that the upper bar grid of each folding pocket is attached to the cover part of the housing, while the respective lower bar grid of each folding pocket is mounted with the stop rail on the base part of the housing and / or on the roller frame.

The advantage of this configuration is that when the housing is opened, the folding pockets are also opened.

So that the housing does not have to be opened every time it is necessary to adjust the stop rails of the folding pockets to a new rolling stock format and / or to a new folding shape, a further embodiment provides that the stop rails of the two folding pockets each run parallel to the folding pocket plane , endless tension links in the form of chains or belts, which are each engaged at one end of the folding pocket via deflection rollers and at the other end of the folding pocket with drive rollers or wheels, each of which sits in pairs on a common drive shaft, which is connected to one from the outside of the housing actuatable rotary member is provided.

With such a device, the stop rails of the two folding pockets can each be adjusted independently of one another and in a very convenient manner from the outside by turning the rotating members, which can consist, for example, of rotary knobs, with the housing closed. It is possible to provide the stop rails with an outwardly pointing pointer, which moves during adjustment along a scale arranged on the outside of the housing, on which the respective position of the stop rail can be read.

However, it is more advantageous if in each case position scales for the stop rails of the fold pockets are arranged in window-like recesses of a side wall of the base part which are arranged approximately at the level of a folding pocket and run parallel to the recess and the stop rails are provided with positioning pointers lying within the position scales. The reading and determination of the respective stop position can then be carried out in a manner similar to that of a radio scale at the position of the position pointer located immediately behind the scale. An opening through which the position pointer is guided to the outside is therefore not necessary. The housing can be completely closed at this point and therefore much better its purpose do justice to noise protection.

So that the stop rails cannot change their predetermined position unintentionally, the drive shafts and / or the rotating members are each provided with a device for fixing their respectively set rotational position. In the simplest case, such a device can consist of a clamping screw which presses radially on the shaft or the rotating member in a threaded bore fixed to the housing or a screw which is arranged in an eccentric threaded hole of the rotating member and which is in the set position of the rotating member against the Outer surface of the housing is screwed.

According to a further advantageous embodiment, it is provided that at least one of the vertical side walls of the base part has a cutout in the area lying between the bottom of the first folding pocket and the transport device. This creates the advantageous possibility of seeing the folded material emerging from the outlet opening directly.

• Fig. 1 in perspektivischer Seitenansicht eine Stauchfalzmaschine;
• Fig. 2 einen vertikalen Längsschnitt der in Fig. 1 dargestellten Stauchfalzmaschine mit teilweise aufgeklapptem Gehäuse;
• Fig. 3 die Stauchfalzmaschine der Fig. 1 in Seitenansicht mit aufgeklapptem Gehäuse und aus dem Gehäuse herausgenommenem Walzengestell;
• Fig. 4 einen vertikalen Längsschnitt einer anderen Ausführungsform der in Fig. 1 dargestellten Stauchfalzmaschine;
• Fig. 5 die Stauchfalzmaschine der Fig. 4 mit einem anderen Anlegetisch und einer unterschiedlich gestalteten Auslauföffnung in gleicher Schnittansicht;,
• Fig. 6 eine weitere Ausführungsform der in Fig. 1 dargestellten Stauchfalzmaschine mit teilweise aufgeklapptem Deckelteil und geöffneten Falztaschen in einem vertikalen Längsschnitt;
• Fig. 7 die Stauchfalzmaschine der Fig. 2 bei abgenommenen Deckelteil in Draufsicht. Bei allen in den Fig. 1 bis 7 dargestellten

Based on the drawing, the subject matter of the invention is explained in more detail below using different exemplary embodiments. It shows:

• 1 is a perspective side view of an upset folding machine;
• FIG. 2 shows a vertical longitudinal section of the upset folding machine shown in FIG. 1 with the housing partially opened;
• 3 shows the edging folding machine of FIG. 1 in a side view with the housing opened and the roller frame removed from the housing;
• Fig. 4 is a vertical longitudinal section of another embodiment of the upset folding machine shown in Fig. 1;
• 5 shows the edging folding machine of FIG. 4 with another feed table and a differently designed outlet opening in the same sectional view;
• 6 shows a further embodiment of the upset folding machine shown in FIG. 1 with the cover part partially opened and the folding pockets open in a vertical longitudinal section;
• Fig. 7, the upset folding machine of Fig. 2 with the cover part removed in plan view. In all shown in FIGS. 1 to 7

Exemplary embodiments are in each case a compression folding machine with a roller frame 1, which has a roller mechanism with an electric motor 4 between two metal plates 2 and 3, which is accommodated together with two folding pockets 5 and 6 in a two-part housing 7. The housing 7 consists of a base part 8 and a cover part 9. To accommodate the roller frame 1, the base part is provided with a shaft-like recess 12 in the middle between two bottoms 10 and 11 arranged immediately below the two folding pockets 5 and 6 and running parallel to these , which is delimited on each end by an end wall 13 or 14 (FIGS. 2, 3, 5 and 6). In this recess 12, the roller frame 1 can be inserted with the cover part 9 open in the manner indicated in FIG. 3 from top to bottom in such a way that the two folding pockets 5 and 6 are mutually offset in height but with approximately the same inclination directly above the two bases 10 and 11 come to rest and can be fastened in this position in a suitable manner in the base part, in particular on vertical partition walls 15 and 16 (FIG. 7). Correspondingly at an angle one above the other, the two pairs of folding rollers W1 / W2 and W3 / W4 are also offset in terms of height, such that the two folding rollers W2 and W3 form the first rolling point I and the two folding rollers W3 and W4 form the second and last folding point 11, while the folding roller W1 touching the folding roller W2 forms with this an intake point E, through which the retracted folded material is either guided into the folding pocket 5 or directly to the folding point I. In the front wall 14 delimiting the recess 12 on the end face, an obliquely downwardly directed outlet opening 17 is provided, through which the folded folded material reaches a transport device 18 which is arranged below the bottom 10 of the first folding pocket 5 and below the outlet opening 17 and out a plurality of endless belts 19, which are guided over a corresponding number of rollers 20 and 21. Below the transport device 18 there is a further floor 22 which runs parallel thereto and which, in addition to the two floors 10 and 11 and the end walls 13 and 14, gives the base part the required stability. As can be seen from FIG. 2, the inside of the wall section 14 ′ of the end wall 14 above the outlet opening 17 is located in the immediate vicinity of the outer surface of a transport roller 23, which together with a further transport roller 24 forms a pair of transport rollers that between the second fold point II and the outlet opening 17 is arranged. The part of the end wall 14 located below the outlet opening 17 is provided with a wall section 25 directed inwards against the second transport roller 24, which ends in the immediate vicinity of the lateral surface of this transport roller 24. In this way it is ensured that no strong noise emission from the interior of the housing can take place through the outlet opening 17.

For driving the rollers 20 of the transport device 18 seated on a common shaft 20 ', a drive belt 26 is provided which, via a pulley 27 and a gear train 29, establishes the connection to the rolling mill which is driven by the electric motor 4. The drive belt 26 and the pulley 27 are, however, not in the space between the two inner walls 15 and 16 of the base part 8, but in a space 28 formed between the inner wall 15 and a vertical outer side wall 15 '. In this space 28 there are still further gear parts 29/1, which are required to drive the rollers W1 to W4, and 23 and 24 (see FIG. 7). Also on the opposite side, there is an intermediate space 30 between the intermediate wall 16 and an outer vertical housing wall 16 ', in which further gear parts 31 of the roller frame 1 are arranged, which are used to drive a paper feeder 32 or 32' (described in more detail below) (FIG. 2 to 6) serve.

For the lateral limitation of the transport path, which is formed by the transport device 18, the intermediate and outer walls 15/15 'and 16/16' are raised slightly above the upper runs of the belts 19, but otherwise at this point with an approximately triangular cutout 33 provided. Through this cutout 33, the outlet opening 17 is clearly visible from the side and thus the folded material coming from the roller frame is immediately visible and accessible.

A brake device 136 consisting of two brake disks 135 fastened on a common axis 134, which is adjustably fastened to a bar 138 by means of a bracket 137, the folded sheets of folded goods arriving one after the other on the conveyor belts 19 can be pushed together in a scale-like manner. Such devices are known per se and are not the subject of the present invention.

In the embodiment of the housing 7 shown in FIGS. 2 and 3, the upper boundary edges 34 and 35 of the vertical side walls 15, 15 'and 46, 16' of the base part 8 each run at the height of the folding pockets 5 and 6, that is to say in two in height offset, however, parallel planes and are connected to each other by an inclined central portion 36. The cover part 9 is hingedly connected to the base part 8 by a hinge-like joint 37 which is arranged at the lower end of the boundary edge 35. The hinge 37 is arranged on a vertical end wall section 38 of the base part 8 and connects an end wall 39 of the cover part 9 to this wall section 38. The cover part 9 also has vertical double side walls 40 and 41, not shown in the drawing, whose lower boundary edges 42 and 43 are matched to the upper boundary edges 34 and 35 of the base part 8 in such a way that these boundary edges lie sealingly on one another in the closed position of the cover part 9 including the middle sections 36 and 44.

Between the vertical side walls 40 and 41, in the half of the cover part 9 remote from the end wall 39, there is a cover wall 45 which runs horizontally in the closed position of the cover part 9 and the first, i.e. upper, folding pocket 5 covers. At its outer edge, this cover wall 45 is provided with a closing strip 46, which overlaps the upwardly directed edge strip 47 of the base 10 of the base part 8 in the manner shown in FIGS. 4 and 5 when the cover part 9 is in its closed position. Approximately in the middle of the housing, the cover wall 45 has a wall section 48 directed downwards at right angles thereto, which is arranged in such a way that its inner surface 49 lies at least almost in contact with the outer surface of the roller W1 when the cover part 9 is closed. (See FIGS. 4 and 5) The lower edge 50 of this wall section 48, which also represents the upper boundary edge of an inlet opening 51, is located directly in front of the feed point E between the two rollers W1 and W2 and at a short distance above the front end section 52 of one Feed table 53, which is provided with the sheet feed device 32 already mentioned.

In the half of the cover part 9 facing the end wall 39 there is a second cover wall 54 which extends at an inclination angle a of approximately 15 ° with respect to the plane of the cover wall 45 and is arranged such that the feed table 53 resting thereon is exactly at the feed point E. of the two rollers W1 and W2 is directed (see FIGS. 4 and 5).

It is in this case possible to have the front section 52 of the feed table 53 end in the immediate vicinity of the circumference of the roller W2 in order to avoid an excessively large inlet opening 51. Because of the unavoidable through-openings which must be provided for the transport rollers 55 and 56 in the feed table 53, which usually consists of a sheet metal plate, the cover wall 54 in the area of the paper separating device 32 is provided with wall sections 57, 58 and 59 to prevent excessive sound emissions. which form a trough-like recess 59 'for receiving the paper separating device, the end edge of the wall section 59 lying in the closed position of the cover part 9 in the immediate vicinity of the circumference of the folding roller W2.

Another special feature of this embodiment of the upset folding machine shown in FIGS. 2 and 3 is that the two folding pockets 5 and 6, each consisting of two bar grids 61 and 62 or 63 and 64 arranged at a short distance above one another, are divided. While the respective lower bar grids 61 and 63 are fastened in the base part 8, the respective upper bar grids 62 and 64 are arranged and fastened between the vertical side walls 40 and 41 of the cover part 9 in such a way that they functionally functionally the upper in the closed position of the cover part 9 Form half of the folding pocket 5 or 6. This arrangement has the advantage that the folding pockets automatically when the cover part 9 is opened are also open and therefore accessible from the outside, for example, to rectify the causes of faults.

Between the two bar grids 61 and 62 or 63 and 64, each forming a folding pocket, stop rails 65 and 66 are arranged, which are adjustably connected to the respective lower bar grids 61 and 63. In order to be able to adjust these stop rails 65 and 66 to the desired position from the outside when the housing 7 is closed, without having to open the housing 7, the stop rails 65 and 66 are each fastened to two endless toothed belts 67 and 68 or 69 and 70 ( see also Fig. 7), which are arranged on both sides of the folding pockets 5 and 6, respectively. These toothed belts 67, 68, 69 and 70 are each guided via drive wheels 71, 72 or 73, 74 and deflection rollers 75, 76 or 77, 78. The drive wheels 71 and 72 or 73 and 74 each sit in pairs in a rotationally fixed manner on a common drive shaft 79 or 80, each of which is rotatably mounted in the base part 8 at the outer end of a folding pocket 5 or 6 and additionally each provided with a turning handle 81 or 82 are. As can be seen from FIGS. 1 and 7, the two rotary handles 81 and 82 are each arranged on the outside of the outer side wall 16 'of the base part 8. The arrangement of the drive wheels 71 to 74 and pulleys 75 to 78 and the toothed belt 67 to 70 is made such that the upper runs of the toothed belt 67 to 70 run parallel to the plane in which the stop rails 65 and 66 in the folding pockets 5th and 6 are adjustable. The stop rails 65 and 66 can thus be adjusted by simply rotating the two rotating members 81 and 82 in one direction or the other.

So that the stop rails 65 and 66, once set to a desired position, do not move automatically, the two drive shafts 79 and 80 are each provided with a device for fixing their rotational position. This device consists in each case of a disk 83 fixedly attached to the drive shaft 79 or 80 and a knurled screw 84 which can be pressed onto the outer surface of the disk 83 by a threaded bore of a threaded bushing 85 seated in the edge strip 47 or in the wall section 38 of the base part 8 to fix them against rotation. When the knurled screws are loosened, the drive shafts 79, 80 can be turned easily.

So that the respective position of the two stop rails 65 and 66 can be checked from the outside even when the housing is closed, both stop rails 65 and 66 are provided with extensions 86 and 87, at the ends of which there are position indicators 88 and 89, respectively, which are close to the Reach inside of the outer vertical housing wall 16 '. Position scales in the form of glass-like transparent scale rulers 92 and 93, which are shown in FIGS. 1, 3 and 7, are arranged in corresponding window-like recesses 90 and 91 of the outer side wall 16 'in the range of movement of these position indicators 88 and 89.

The embodiments of the upset folding machine shown in FIGS. 4, 5 and 6 differ from the embodiment of FIGS. 1, 2 and 3 together in that the dividing line between the base part 8 and the cover part 9 runs differently. In this embodiment, the joint 37 is arranged on a higher end wall section 38 ′ of the base part 8. For this purpose, the end wall 39 'of the cover part 9 is correspondingly shorter and the dividing line 94 between the base part 8 and the cover part 9 does not run parallel to the folding pocket 6 in the left half of the housing, but partly horizontally and vertically. Only in the area of the folding pocket 5 does the dividing line run the same as in the embodiment of FIGS. 2 and 3. This dividing line 94 is formed by two upper horizontally running boundary edges 35/1 and 35/2 which are connected by a vertical connecting edge 36/1 and in the area of the folding pocket 5 from the upper boundary edge 34 running parallel to this on the base part 8 on the one hand and on the other hand from the respective lower boundary edges 42/1 and 42/2, which are connected to one another by a vertical connecting edge 44/1, and by the inclined one Boundary edge 43 of the lid part 9. Another commonality, by which the embodiments shown in FIGS. 4, 5 and 6 differ from that of FIGS. 2 and 3, is that the upper bar grids 63 and 64 of the two folding pockets 5 and 6 are each hinged at their inlet end by means of a cross bar 62/1 or 64/1 in the roller frame 1, so that the folding pockets 5 and 6 can be opened when the cover part 9 is open, as is indicated in FIG. 6.

While in the embodiments of FIGS. 5 and 6, the end wall 14 with the outlet opening 17 is of exactly the same design as in the embodiment of FIG. 2, in the embodiment of FIG. 4 there is another outlet opening 17/1 on an end wall 14/1 provided, which is formed by two inward and directly at the rollers W3 and W4 ending wall sections 25/1 and 25/2. In this embodiment, the transport rollers 23 and 24 can be omitted.

In contrast to the embodiments of FIGS. 2, 3, 4 and 6, in the embodiment of FIG. 5 a paper feed device 32 'is arranged above the feed table 53, and therefore the cover part 9 is in this case with a straight line up to the folding roller W2 Cover wall 54 'provided. Otherwise, the embodiment of FIG. 5 corresponds exactly to the embodiment of FIG. 6.

In all embodiments are in Roller frame 1 gear members 31 are provided, through which the paper feeder 32 or 32 'in the closed position of the cover part 9 are driven by the roller mill.

The feed table 53 is provided with side guide walls 95, 96 in all embodiments.

In contrast to the base part and cover part shapes of FIGS. 1 to 6, FIG. 1 shows a further variant in which a straight, continuous, oblique dividing line 97 is provided between the base part 8 and the cover part 9, which lines are arranged with a correspondingly offset arrangement of the folding roller pairs and the folding pockets can also be considered as a possible embodiment.

Claims (15)

1. Pocket folding machine comprising, mounted in a roll stand (1) and jointly driven by an electric motor (4), two pairs of folding rollers (W1, W2, W3, W4) and, mounted at staggered heights on opposite sides of the roll stand (1), two folding pockets (5, 6) having manually adjustable abutments (65, 66) for the stock which is to be folded, the roll stand (1) and the folding pockets (5, 6) being enclosed by sound- preventive housing parts (8, 9), which form an inlet aperture (51) on one side of the roll stand and an outlet aperture (17, 17/1) on the opposite side of the roll stand, characterised in that

- a housing (7) is provided which encloses jointly and on all sides both the roll stand (1) and the folding pockets (5, 6), the said housing (7) comprising two separably and/or articulatingly connected parts, namely a base part (8) and a cover part (9),

- the base part (8) comprises between two bottoms (10, 11) extending directly under the two folding pockets (5, 6) and at least approximately parallel with them, and two lateral vertical walls (15, 16), a shaft-like recess (12) to accommodate the roll stand (1),

- and in that the cover part (9) comprises between two vertical side walls (40, 41 ) a first cover wall (45) which masks the upper folding pocket (5) and which has a wall portion (48) extending towards the inlet aperture (51), and a second cover wall (54, 54') located under the bottom folding pocket (6) and leading to the under side of the inlet aperture (51), and an end wall (39, 39') located under the second cover wall (54), and in that

- the lines of separation (94, 97) of the vertical housing walls (15, 15', 16. 16', 40, 41) extend at least partly into the vicinity of the folding pocket planes.

2. Pocket folding machine according to Claim 1, characterised in that the cover part (9) is connected by a joint (37) disposed at the bottom edge of an end wall (39, 39') to an end wall portion (38, 38') located beneath it and constituting part of the base part (5), and is adapted to be swung open.

3. Pocket folding machine according to Claim 1, characterised in that the wall portions (48, 59 and 14, 25, 25/1, 25/2) bounding the inlet aperture (51) and the outlet aperture (17, 17/1 ) of the two housing parts (8, 9) extend or end in each case in the vicinity of the periphery of a folding roller (W1, W2, W3, W4) or conveyor roller (23, 24).

4. Pocket folding machine according to one of Claims 1, 2 or 3, characterised in that the second cover wall (54, 54') is disposed in such a way as to extend upwardly in an outwards direction from the inlet aperture (51), forming the supporting surface for a feeder table (53) extending slantwise downwardly to the inlet aperture.

5. Pocket folding machine according to Claim 4, characterised in that the second cover wall (54) is provided with a trough-like depression (59) to accommodate a sheet feeder (32).

6. Pocket folding machine according to Claim 1, characterised in that the two folding pockets (5, 6) and the two bottoms (10, 11) disposed immediately beneath them have at least approximately the same angle of inclination, the upper folding pocket (5) assuming an outwardly rising attitude in respect of the roll stand (1) while the second lower folding pocket (6) assumes a position in which it falls away outwardly from the roll stand (1).

7. Pocket folding machine according to Claim 1 or 3, characterised in that the outlet aperture (17, 17/1) is disposed in an end wall (14, 14/1 ) of the shaft-like recess (12) in the base part (8), adjacent the bottom (10) disposed under the first folding pocket (5).

8. Pocket folding machine according to Claim 7, characterised in that the end wall (14/1) of the shaft-like recess (12) of the base part (8) has, to form the outlet aperture (17/1) two obliquely inwardly directed wall portions (25/1, 25/2) which end in the immediate vicinity of the peripheral surfaces of the two folding rollers (W3, W4) which in the direction of passage constitute the final folding station (11).

9. Pocket folding machine according to Claim 1, characterised in that under the bottom (10) of the first folding pocket (5), beneath the outlet aperture (17, 17/1) there is a conveyor (18) for material which is to be folded and which is disposed immediately adjacent the outlet aperture (17,17/1), a housing bottom (22) extending substantially parallel with the conveyor (18) being disposed underneath this latter.

10. Pocket folding machine according to one of Claims 1 to 9, characterised in that the folding pockets (5, 6) consist in each case of two spaced apart and parallel superposed rod grids (61, 62 and 63, 64) between which there is a longitudinally displaceable abutment rail (65, 66) and which are connected to each other in such a way as to be separable and/or openable.

11. Pocket folding machine according to Claim 10, characterised in that whichever is the upper rod grid (62, 64) of each folding pocket (5, 6) is fixed on the cover part (9) of the housing (7), while whichever is the lower rod grid (61, 63) of each folding pocket is, with the abutment rail (65, 66), mounted on the base part (8) of the housing (7) and/or on the roll stand (1).

12. Pocket folding machine according to one of Claims 1 to 11, characterised in that the abutment rails (65, 66) of both folding pockets (5, 6) are connected in each case to endless traction members in the form of chains or belts (67, 68, 69, 70) which extend parallel with the plane of the folding pockets and which engage at one end of the folding pocket (5, 6) over direction reversing rollers (75, 76, 77, 78), engaging at the other end of the folding pockets (5, 6) with drive rollers or wheels (71, 72, 73, 74) which are in each case mounted on a common drive shaft (79, 80) which is provided with a rotating member (81, 82) which is adapted to be actuated from outside the housing (7).

13. Pocket folding machine according to Claim 12, characterised in that in window-like cut-outs (90, 91) in a side wall (16') of the base part (8), disposed substantially at the height of a folding pocket (5, 6) and extending parallel therewith, there are position scales (92, 93) for the abutment rails (61,66) of the folding pockets (5, 6), the abutment rails (65, 66) being provided with position pointers (88, 89) located within the position scales (92, 93).

14. Pocket folding machine according to Claim 12, characterised in that the shafts (79, 80) and/or the rotary members (81, 82) are provided with a device for fixing their preset rotary position (83, 84, 85).

15. Pocket folding machine according to Claim 1, characterised in that at least one of the vertical side walls (15, 15', 16, 16') of the base part (8) has a cut-out (33) in the region located between the bottom (10) of the first folding pocket (5) and the conveyor device (18).

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