EP2719526A1 - Device for producing a cushion from paper - Google Patents

Abstract

The device (10) has a counter roller (44) arranged opposite to a conveying roller (40) for conveying a paper sheet (34), while another counter roller (46) is arranged opposite to a driven crumpling roller (42) for crumpling the paper sheet. The conveying roller is operated at a greater rotational speed than the crumpling roller that is arranged in the conveying direction (38) behind the conveying roller. The conveying roller and the crumpling roller are identical, and are driven by a drive motor (48) that is connected to the rollers through a belt drive (50).

Description

The present invention relates to a device for producing a padding product from paper according to the preamble of claim 1.

For filling voids in the packaging of articles, upholstery products made from paper webs by crumpling, as well as methods and apparatus for their manufacture, are known in a variety of ways. They are based, for example, on the fact that a paper web is first folded by machine and then compressed, whereby a crumpling takes place. From this continuously generated crumpled paper web then individual sections are cut to the desired length. This can be done in the same device. Preparing the paper web can also be taken laterally before crumpling.

That's how it shows DE 102 42 998 A1 an apparatus for making a padding product from paper, the apparatus comprising means for crumpling a continuous paper web to produce a swaged paper tube. For this purpose, a conveyor roller with counter-roller and a crumpling roller with counter-roller are arranged one behind the other in the device in the conveying direction of the paper web. In contrast to the crumple roller, the conveyor roller is driven at a higher rotational speed, whereby the paper is first compressed between the two pairs of bearing rollers and then crumpled by the crumpling roller.

The object of the present invention is to provide a device for producing padding products made of paper, which has as many standardized components or assemblies as possible in order to produce the device as inexpensively as possible.

To solve the problem it is proposed that the conveying roller and the crumpling roller are identical.

A central part of the device is a so-called crimping unit, which essentially comprises the driven conveyor roller and the driven crumple roller. Usually in the kneading of the conveying roller and the crumpling roller each still a non-driven counter-roller assigned to pressurize the conveying roller and the crumple roller. In operation, an initially folded continuous paper web is drawn by the driven conveyor roller with its associated counter-roller in the kneading and then fed to the crumple roller with its associated counter-roller. Due to the greater rotational speed of the conveyor roller relative to the crumple roller, the paper web is compressed between the two bearing rollers. The compressed paper web is then crumpled between the crumple roll and its counter roll.

An identical embodiment of the conveyor roller and the crumple roller is advantageous because the conveyor roller and the crumpling roller - each considered in principle - perform the same functions in principle, namely to promote the paper web with the help of the respective counter-roller. So far, however, it was assumed that in particular the crumple roller must be specially shaped in order to crumple the compressed and thus a larger Thickenabmesssung and having stiffness reliably paper and can transport on.

An outer peripheral surface of the conveying roller and the crumple roller can be formed with a corresponding profiling and / or with a suitable surface finish, which advantageously support the conveyance of the paper. Thus, the surface could e.g. also be rubberized. The identical design of the conveyor roller and the crumple roller refers in addition to the geometric dimensions also on the material used for the production. This lowers the manufacturing cost of the device without affecting the function of the device.

In a preferred embodiment of the device it is provided that the device has a drive motor which drives both the conveyor roller and the crumpling roller and is connected thereto via a belt drive. The use of a belt drive is structurally simple and reduces the manufacturing cost of the device.

In addition, it is provided that the conveying roller and the crumple roller are each assigned a pulley, and that the crimping roller associated pulley has a larger diameter than that of the conveying roller. As a result, the necessary different rotational speeds of the two rolls are realized in a simple and therefore cost-effective manner.

In a further development, it is possible that the crumpling roller and the pulley associated therewith and the conveying roller and the belt pulley associated with it are integrally formed. This leads to a further cost reduction and simplification in the manufacture and assembly.

In an alternative embodiment, it is possible that a drive shaft of the drive motor has two pulleys of different sizes, wherein a first pulley of the drive motor with a larger diameter drives the feed roller and a second pulley of the drive motor with a smaller diameter drives the crumple roller. In this case, it is possible to dispense with different belt wheels in the area of the conveying roller and crumple roller, which results in constructional and thus production-related advantages.

In a further embodiment, it is possible for the counter-roller opposing the conveyor roller and the counter-roller opposing the crumpling roller to be identical. In this case, the formation of the counter-rollers can deviate from the conveying or crumpling roller and, for example, a smooth, for example, in contrast to the profiled configuration of the circumferential surface of the conveying or crumpling roller. coated with rubber, have peripheral surface. In a particularly simple and therefore particularly cost-effective device, it is possible that the conveying roller, the crumpling roller and the two counter-rollers in the geometrical dimensions, in the formation of the peripheral surfaces and the manufacturing material used is identical. So even all four rolls of the crumb are completely identical.

It is also possible that the conveying roller and the crumpling roller have at least partially a toothed or corrugated peripheral surface. Such profiles are particularly suitable for effectively supporting the conveyance of the paper webs.

It is also advantageous if the circumferential surface of the conveyor roller and the crumple roller each have a circumferential groove. In the groove, on the one hand, abrasion can collect, in particular from the paper web, and thus prevents a coating from forming on the circumferential surface of the conveying roller or the crumple roller, which impairs the conveying action of the rollers. On the other hand, the groove provides an escape space for crumpled paper material during processing and at least reduces the risk of interference, for example a paper jam, during operation.

It is also advantageous if the drive motor is a stepper motor. A stepper motor offers the advantage that it is very precisely adjustable in its speed and can be stopped without any substantial follow-up time. Even a reverse run is easily possible, for example, to remove a paper jam in the device.

Further, it is advantageous that the counter-rollers are acted upon by one of the respective counter-roller associated biasing device against the crumpling or conveying roller with pressure. For this purpose, the pretensioning device preferably has at least two spring elements which are supported against a non-movable surface and thus exert pressure on the respective counter-roller. Hydraulic or pneumatic devices are also conceivable. Each counter-roller therefore has a pretensioning device assigned to it.

Other features, applications and advantages of the invention will become apparent from the following description of an embodiment of the invention, which is illustrated in the drawing. All described or illustrated features alone or in any combination form the subject of the invention.

Figur 1

eine stark schematisierte Seitenansicht wesentlicher Komponenten einer erfindungsgemäßen Vorrichtung zur Herstellung eines Polsterungsprodukts aus Papier;

Figur 2

eine Seitenansicht der erfindungsgemäßen Vorrichtung zur Herstellung eines Polsterungsprodukts aus Papier;

Figur 3

eine perspektivische Ansicht der Vorrichtung aus Figur 2;

Figur 4

eine perspektivische Ansicht eines Knüllwerks der erfindungsgemäßen Vorrichtung;

Figur 5

eine Ansicht von oben des Knüllwerks aus Figur 4;

Figur 6

eine Seitenansicht des Knüllwerks aus Figur 4 oder 5;

Figur 7

eine Draufsicht auf ein Schneidwerk der erfindungsgemäßen Vorrichtung von einer ersten Seite; und

Figur 8

eine Draufsicht auf ein Schneidwerk der erfindungsgemäßen Vorrichtung von einer zweiten Seite.

In the drawing show:

FIG. 1

a highly schematic side view of essential components of an apparatus according to the invention for producing a padding product made of paper;

FIG. 2

a side view of the device according to the invention for producing a padding product made of paper;

FIG. 3

a perspective view of the device FIG. 2 ;

FIG. 4

a perspective view of a crumb of the device according to the invention;

FIG. 5

a view from above of the crumpling FIG. 4 ;

FIG. 6

a side view of the crumpling FIG. 4 or 5 ;

FIG. 7

a plan view of a cutting mechanism of the device according to the invention from a first side; and

FIG. 8

a plan view of a cutting mechanism of the device according to the invention from a second side.

FIG. 1 shows a highly schematic side view of essential components of a device 10 according to the invention for the production of a padding product made of paper. FIG. 2 shows a perspective side view of the device 10 from the outside; FIG. 3 shows a perspective view of the device 10 from FIG. 2 diagonally from above.

The apparatus 10 essentially comprises a paper store 12, a folding table 14, a crumple 16, a cutting unit 18 and a discharge chute 20. As shown in FIGS Figures 2 and 3 it can be seen, the folding table 14, the kneading 16 and the cutting unit 18 are at least partially enclosed by a housing 22. The housing 22 is multi-part, so that the arranged in the housing 22 facilities, eg via lockable doors, are accessible. The device 10 is mounted on a chassis 24 on rollers to make the device 10 locally movable.

The paper store 12 may comprise two paper rolls 26a and 26b with continuous paper, wherein in the Figures 2 and 3 only the paper roll 26a is shown. Each paper roll 26a and 26b may have a weight of several 100 kg. In the resting state of the device 10, the paper rolls 26a and 26b are rotatably mounted twice. On the one hand, the paper rolls 26a and 26b lie on a pair of rotatable bearing rolls 28a and 28b, respectively, on the other hand, they lie on an inclined support surface 30a and 30b. The two bearing surfaces 30a and 30b are coated or made of a material having a high frictional resistance.

Via deflecting rollers 32a and 32b, a paper web 34 is fed to the folding table 14. In the folding table 14, a plurality of through holes 36 are provided.

The folding table 14, together with a lateral guide, not shown in the drawing, serves to turn over the edges of the flat paper web 34 so as to form a flat paper tube. During the transport of the paper web 34 on the folding table 14, air is entrained through the passage openings 36 into a gap between the paper web 34 and the folding table 14, so that the paper web 34 lies on an air cushion. As a result, the resistance between the paper web 34 and the folding table 14 is reduced.

In the conveying direction 38 of the paper web 34, the crumple 16 adjoins the folding table 14. The FIGS. 4 and 5 show the inside of the crumple 16 in detail. FIG. 4 shows the kneading 16 in a perspective view obliquely from the side; FIG. 5 shows the Knüllwerk 16 in a view from above. The kneading 16 comprises, viewed in the conveying direction, first a conveying roller 40 and then a crumpling roller 42. The conveying roller 40 and the crumpling roller 42 are each assigned a counter roller 44, 46.

The conveyor roller 40 and the crumple roller 42 are driven by a common drive motor 48 via a drive belt 50. The drive motor 48 is preferably a so-called stepper motor. The step motor offers the advantage that it is very precisely adjustable in its speed and can be stopped without significant lag time. A reverse run is easily possible if required.

According to the invention, the conveying roller 40 and the crumple roller 42 are identical in their geometrical dimensions, in the formation of the peripheral surfaces and in the material used for the production. In this case, both rollers 40, 42 at least partially have a profiled, for example, corrugated, peripheral surface, as it FIGS. 4 and 5 demonstrate. The two counter-rollers 44, 46 can, as it is in particular FIG. 4 shows to be identical. You can both have eg a rubberized peripheral surface. However, the counter rollers 44, 46 can also be identical in an embodiment (not shown) to the conveying roller 40 or to the crumpling roller 42, so that all four rollers 40, 42, 44 and 46 are identical.

The conveying roller 40 and the crumple roller 42 have according to FIGS. 4 and 5 a circumferential groove 52. On the one hand, abrasion, in particular of the paper web 34, can collect in the groove 52. The groove 52 prevents so that an unwanted coating on the peripheral surface of the conveying roller 40 and the Crimping roller 42 forms. On the other hand, the groove 52 provides an escape space for the crumpled paper tube 34 during processing.

The conveyor roller 40 and the crumple roller 42 are each assigned a pulley 54, 56 for driving via the drive belt 50. In the specific embodiment of the Figures 5 and 6 For example, the crimping machine 16 comprises two lateral retaining plates 58 and 60, which are connected to one another via transverse struts 62, whereby a cage-like and self-supporting housing construction for the crimping unit 16 is created. Both the conveyor roller 40 and the crumple roller 42 are rotatably mounted on rotatable bearing shafts 64, 66, whose ends are in turn rotatably mounted in the holding plates 58, 60. The drive motor 48 is disposed inside the crimping unit 16. Its drive shaft 68 penetrates the in FIG. 5 right holding plate 60 to the outside. On the outer end of the drive shaft 68 is rotatably with her a drive pulley 70 is arranged.

The bearing shaft 64 of the conveying roller 40 penetrates the holding plates 58 and 60. On an outer end of the bearing shaft 64 on the holding plate 60, a pulley 72 is arranged. This is coupled via a drive belt 74 to the drive pulley 70 of the drive motor 48 (see FIG. 6 ). The opposite outer end of the bearing shaft 64 of the feed roller 40 passes through the holding plate 58. The pulley 54 is arranged on it. The adjacent outer end of the bearing shaft 66 of the crumple roller 42 also penetrates the retaining plate 58. On the pulley 56 is arranged. The two pulleys 54 and 56 are coupled together via the drive belt 50.

The different diameters of the two pulleys 54 and 56 cause the conveyor roller 40 to rotate at about 1.5 times the speed of the crumple roller 42. It is also conceivable in another embodiment that the Crimping roller 42 and its associated pulley 56 and the feed roller 40 and its associated pulley 54 are integrally formed.

In an alternative, not shown embodiment of the device 10, it is also possible that a drive shaft of the drive motor 48 has two drive disks of different sizes, wherein a first drive pulley of the drive motor 40 with a larger diameter drives the feed roller 40 and a second drive pulley of the drive motor 40 with a smaller diameter, the crumple roller 42 drives.

Both counter rollers 44, 46 are arranged on a biasing device 76. The counter rollers 44, 46 are mounted within the biasing means 76 on a common frame-like support 78 which is resiliently supported relative to the transverse struts 62 by means of two spaced-apart adjustable spring elements 80. The counter rollers 44, 46 produce in this way an adjustable pressure for each counter roll on the peripheral surface of the conveying roller 40 and the crumple roller 42 and have no own drive.

In the conveying direction 38 of the paper web 34 joins the kneading 16, the cutting unit 18, which is also formed as a modular unit on its own base plate 82. The FIGS. 7 and 8th each show a plan view of the cutting unit 18 from two opposite sides, wherein FIG. 7 the actual cutting mechanism 18 and FIG. 8 a drive 84 of the cutting unit 18 shows. It can be seen that the conveying direction in the cutting unit 18 with respect to the conveying direction in the kneading unit 16 at an angle, in this case of about 90 °.

The drive 84 is designed as a cam-controlled eccentric drive. The drive 84 comprises a drive motor 86, again designed as a stepping motor, which is mounted on the in figure 7 shown side of the cutting unit 18 is arranged and three toothed wheels 88, 90 and 92 and two toothed belts 94, 96 a cam eccentric 98 drives, which engages via a pin 99 slidably into a slot 101 in a connecting rod 100 and is thus connected to a sliding roller 102 , This in turn is coupled to a carriage which is linearly guided in a longitudinal slot 104 present in the housing plate 82 and connected to a linearly guided clamping plate 106. This is arranged below a rectangular opening 108 in the housing plate 82, at the top thereof a cooperating in operation with the clamping plate 106 stationary counter-surface 110 is present.

Furthermore, the cutting unit 18 comprises a tear-off plate 112 arranged above the opening 108 with a tear-off edge 114 which is slightly obliquely set and provided with rip-off teeth. The tear-off plate 112 is connected to a movable cross-member 118 via two lateral push rods 116 guided linearly on the housing plate 82 is in turn connected via a connecting rod 120 with the gear 92 and the cam eccentric 98. The push rods 116 are also part of the linear guide of the clamping plate 106. The tear-off plate 112 is guided in a recess 122 (see FIG. 1 ).

Furthermore - seen in the conveying direction 38 of the paper web 34 - joins the cutting unit 18 of the discharge chute 20 ( FIGS. 1 to 3 ). The discharge chute 20 has inside an elongated and presently S-shaped curved discharge channel 124 (see FIG. 1 ) on. The curvature K and the width W of the discharge channel 124 are selected so that a person can not penetrate with the fingertips of one hand through the discharge channel 124 to the cutting unit 18.

In the vicinity of the paper rolls 26a and 26b, a switch 126 for switching on and off the device 10 is arranged, which are preferably operated manually in the manner of a button can and is connected to a not shown in the drawing control of the device 10.

The device 10 operates as follows: The paper web 34 is withdrawn by turning on the drive motor 48 from the paper roll 26a through the conveying roller 40 with its counter-roller 44. By the in FIG. 1 essentially upwardly directed tensile force of the paper web 34 on the paper roll 26a lifts it slightly off the support surface 30a (see dashed circle 128) so that the paper roll 26a essentially rests only on the support roll 28a and thus can be rotated with little resistance , If the drive of the paper web 34 is interrupted, for example in the event of a paper tear, the paper roll 26a falls back onto the support surface 30a. Due to the friction between the bearing surface 30a and the paper roll 26a, the rotation of the paper roll 26a is strongly decelerated. A possible further rotation of the paper roll 26a due to the inertia is prevented or at least greatly reduced.

Because two paper rolls 26a and 26b can be stored in the apparatus 10, the apparatus 10 can be operated for a comparatively long time without having to bring a new paper roll from an external warehouse. In addition, when the paper of the paper roll 26a is consumed, the paper roll 26b can be used immediately, without having to be lifted out of its storage position. This is shown in the drawing by a dashed line 130. It is also possible, by the way, that paper is withdrawn from both paper rolls 26a and 26b at the same time, that is, a double-layered paper web 34 is processed in the device 10.

For insertion of the paper web 34 into the device 10, for example after a paper tear or when a new paper roll 26a or 26b is started, inter alia, the button 126 is used. By pressing the button 126th the drive motor 48 is set in motion briefly, whereby the threading is facilitated. The arrangement of the button 126 directly in the vicinity of the paper rolls 26a and 26b, the threading is facilitated and accelerated. The button 126 may also serve to briefly cause the crumple 16 to run backward to remove any paper jam that may be present.

The crumpling of the paper tube 34 in the kneading unit 16 is achieved in a manner known per se by means of the conveying roller 40 and crumpling roller 42 rotating at different rotational speeds and the respective counter-rotating rollers 44, 46.

The compressed and crumpled paper web 34 is then fed to the cutting unit 18. At the request of the operator, the clamping plate 106 is first moved against the mating surface 110 by the eccentric drive 84 described above, and the crumpled paper web 34 is thus clamped between the clamping plate 106 and the mating surface 110. As a result of the further rotation of the gear 92, the tear-off plate 112 is moved into the clamped and crumpled paper tube 34 and this is thereby separated. By further rotation of the eccentric 84 pull the tear plate 112 and then the clamping plate 106 back. A complete clamping and tearing sequence is effected by a 360 ° rotation of the gear 92 and the cam eccentric 98.

The crumpled and severed paper web 34 is moved by the subsequent paper web into the output channel 124 of the ejection shaft 20. The compressed paper webs 34 separated from the cutting unit 18 can then be removed at the projecting end of the discharge chute 20. Due to the elongated S-shape of the discharge chute 20, it is impossible to access with the arm and the hand, for example, in a paper jam in the discharge chute 20 so far there is a risk of the hand reaching into the area of the cutting unit 18.

Claims (10)

Apparatus (10) for producing a padding product made of paper, comprising a driven conveying roller (40) and a counter-roller (44) opposite this for conveying a paper web (34) and having a driven crumpling roller (42) and a counter-roller (46 ) for crumpling the paper web (34), the conveying roller (40) being operated at a greater rotational speed than the crumpling roller (42) and the crumpling roller (42) being arranged downstream of the conveying roller (40) in the conveying direction (38), characterized that the conveying roller (40) and the crumpled roller (42) are identical. Apparatus (10) according to claim 1, characterized in that it comprises a drive motor (48) which drives both the conveying roller (40) and the crumple roller (42) and is connected thereto via a belt drive (50). Device (10) according to claim 2, characterized in that the conveyor roller (40) and the crumple roller (42) each have a pulley (54, 56) is associated, and that of the crumple roller (42) associated pulley (56) has a larger diameter has as the conveyor roller (40) associated pulley (54). The apparatus (10) according to claim 3, characterized in that the crumple roller (42) and its associated pulley (56) and the conveying roller (40) and its associated pulley (54) are integral. Device (10) according to one of claims 2 to 4, characterized in that a drive shaft of the drive motor (48) at least indirectly drives two drive disks of different size, wherein a first drive pulley of the drive motor (48) with a larger diameter drives the feed roller (40) and a second drive pulley of the drive motor (48) with a smaller diameter drives the crumple roller (42). The apparatus (10) according to one of the preceding claims, characterized in that the conveying roller (40) opposite the backing roll (44) and which are identical to the crumpled roller (42) opposite the counter-roller (46). Device (10) according to any one of the preceding claims, characterized in that the conveying roller (40) and the crumple roller (42) at least partially have a toothed or fluted peripheral surface. Device (10) according to claim 7, characterized in that the peripheral surface has a circumferential groove (52). Device (10) according to one of the preceding claims, characterized in that the drive motor (48) is a stepper motor. Device (10) according to any one of the preceding claims, characterized in that the counter-rollers (44, 46) by a respective counter-roller (44, 46) associated biasing means (58) against the conveyor roller (40) and the crumple roller (42) with pressure be charged.

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