EP1607008B1 - Conveying drum of the tobacco industry - Google Patents

Abstract

Several parts to be assembled in order to form cigarettes are moved while being connected to the outer surface of a rotating drum (10) by suction ducts (16). The openings (15) at the top of the ducts (16) are positioned in a row parallel to the rotation axle (18) of the drum (10). When parts of another size have to be conveyed, the openings (15) can be adjusted in size by a control element (30) designed as a horizontally movable hollow bolt (30, 31) with openings (32) along its surface. The bolt (30) can be locked in two different positions.

Description

The invention relates to a conveyor drum of the tobacco processing industry for cigarettes, filter pieces and their components arranged on the circumference in rows and acted upon by vacuum suction holes, wherein at least one suction hole in a row, the negative pressure by means of a control is switched off.

For the purposes of the invention, the term "components" of cigarettes and filter rods means sections of paper and similar flat and / or sheet material, e.g. Sections and / or webs of cigarette paper, filter paper or tipping paper for joining tobacco rods with filter plugs.

The promotion of the aforementioned objects during the manufacture of cigarettes, filters for cigarettes, sleeves made of cigarette or filter paper and filter cigarettes is used in modern production machines the tobacco-processing industry generally carried out by means of conveyor drums whose outer surfaces for conveying rod-shaped objects (cigarettes, filter rods or filter plugs, filter cigarettes) with grooves for receiving the objects or for conveying sheet-like and / or sheet-like objects (tipping paper sections and / or webs ) are substantially smooth.

During the promotion, these objects are held by suction on the conveyor drums, which abuts on corresponding channels, usually holes. These channels are generally arranged in rows whose lengths correspond to the maximum dimensions of the objects to be transported transversely to the transport direction. Therefore, if objects are conveyed with smaller dimensions, the outer Saugluftkanäle a row inevitably remain free, so that there the suction air flows freely. This air flow is undesirable because of the risk of contamination of the suction channels, the noise or a possible collapse of the vacuum undesirable.

Therefore, in format changes to production machines of the tobacco processing industry unused suction air ducts of the conveyor drum are either closed, which is labor-intensive; or drums with other dimensions of Saugluftkanäle used, which is also laborious and expensive.

From the Patent DE-C-100 12 743 is a transport roller, in particular for guiding narrow paper webs in a cigarette machine, described in which changeable bushes are arranged for changing the paper web width in channels in their rotational positions, which are located in each rotational position a predetermined number of on the transport roller surface Release well mouths.

In addition, is off DE-A-39 28 273 discloses a conveying device or conveying drum, which comprises a switchable control means for the suction air for varying the effective length of Saugluftkanalreihen transversely to the conveying direction.

Moreover disclosed DE-A-26 40 566 a push-in drum for longitudinally receiving rod-shaped articles of the tobacco-processing industry, the push-in drum having a rotatable drum body in which suction holes are provided. Inside the conveyor drum, a spool is arranged on the drum body.

Based on this prior art, it is an object of the present invention to provide a conveyor drum, in which a rapid adaptation to different lengths or widths of the transportable by means of the conveyor drum article is possible.

This object is achieved by a conveyor drum of the tobacco-processing industry for cigarettes, filter pieces and their components arranged on the circumference in rows and acted upon by vacuum suction holes, wherein at least one suction hole in a row, the negative pressure by means of a control is switched off, which further developed is that the control element is longitudinally displaceable in a suction channel connected to the suction holes, wherein the negative pressure at the at least one suction bore by the longitudinal sliding movement of the control off or can be switched, wherein the control is designed as a hollow bolt.

The invention is based on the idea that the negative pressure at a suction or retaining bore of the conveyor drum is interrupted or switched off, that the control by a linear displacement movement, the holding vacuum on at least one suction hole on or off. This results in a type of valve function or switching function of the linearly movable in the suction channel control.

In a transport drum, in which no negative pressure is applied to the, in particular outer, switchable suction bores of a row, tiling paper papers, for example, are transported with a smaller width. When changing the tipping paper width, the control is linearly displaced on the transport drum, so that a negative pressure is applied to the outer suction holes in turn moving the control and thus a larger width of the tipping paper is transported. For this purpose, in particular the outer suction holes of a row are subjected to negative pressure.

For this purpose, it is advantageous if the control element is designed as a hollow bolt, so that the control is designed in the manner of a movable suction channel in a stationary suction channel in the drum body.

For this purpose, it is provided in particular that the bolt or the control on the peripheral surface of the suction holes associated openings, so that the suction holes are subjected to negative pressure or be.

According to a preferred embodiment, a plurality of stationary suction channels of the drum body of the conveyor drum each have a longitudinally displaceable control, so that at the same time the holding vacuum on suction holes of different rows is switched on or off.

Preferably, a plurality of control elements by means of a sliding member are displaceable, so that the negative pressure or the holding vacuum at the suction holes of the conveyor drum in a simple manner is switched on or off simultaneously.

Further, it is advantageous if the sliding member is movable between two stops, so that in an end position of the control at a stop of the negative pressure to the, in particular outer, suction holes is turned off and turned on in the other in position of the negative pressure to the corresponding suction holes.

Preferably, the conveyor drum is designed as a tipping paper roll to transport cut tipping paper strips of different widths. In a format change tipping paper strips are conveyed with a different width by means of the roller, and according to the change in the negative pressure on the switchable outer suction holes is switched on or off.

Fig. 1

einen Querschnitt durch eine Belagpapierwalze in einer Schließstellung für das Haltevakuum an den äußeren Saugbohrungen, wobei der Einfachheit wegen eine Hälfte der symmetrisch aufgebauten Belagpapierwalze dargestellt ist und

Fig. 2

einen Querschnitt durch die Belagpapierwalze (Fig. 1) mit einer Öffnungsstellung des Steuerelements für die äußeren Saugbohrungen.

The invention will now be described by way of example without limitation of the general inventive concept using an exemplary embodiment with reference to the accompanying schematic drawings, to which reference is otherwise expressly made with respect to the disclosure of all details of the invention not explained in detail in the text. Show it:

Fig. 1

a cross section through a tipping paper roll in a closed position for the holding vacuum on the outer suction holes, wherein for simplicity, one half of the symmetrically constructed tipping paper roll is shown and

Fig. 2

a cross section through the tiling paper roll ( Fig. 1 ) with an open position of the control for the outer suction holes.

In the two figures are the same or similar elements or corresponding parts provided with the same reference numerals, so that is apart from a corresponding reimagination.

Fig. 1 shows a cross section through a (half) tamping paper roll 10 in the neck. The tipping paper roll 10 has on the surface of the circumference suction bores 15 which are arranged in rows, wherein the row or rows of the suction bores 15 extend substantially parallel to the axis of rotation 18 of the tipping paper roll 10. The suction bores 15, which are arranged perpendicular to the axis of rotation 18, are connected to a horizontal suction channel 16, which is subjected to negative pressure on the machine side.

The row of suction holes 15 is surrounded at both ends by outer suction holes 25. In the suction channel 16, a sliding bolt 30 is arranged as a control. The sliding bolt 30 has on the negative pressure side a cavity 31 which extends over the entire width of the suction bores 15, 25. In order to be able to pressurize the suction bores 15 with negative pressure, the bolt 30 has apertures 32 in the region of the suction bores 15.

The sliding bolt 30 is connected on the front side with a Bolzenmitnahmescheibe 35. The Bolzenmitnahmescheibe 35 is mounted on a threaded bushing 36, wherein the threaded bushing 36 is slidably mounted or rotatable between two stops 40, 41 parallel to the axis of rotation 18.

In Fig. 1 the outer suction holes 25 are not subjected to negative pressure, since the suction holes 25 are closed by means of the sliding bolt 30. In the other suction holes 15 is a holding vacuum, if the holding vacuum by means of a web or the like is not turned off. In this case, the threaded bush 36 is arranged as a central adjusting element on the inner stop 40. At the in Fig. 1 shown tiling paper roll 10, it is possible to transport by means of the vacuum applied to suction holes 15 tamping paper, for example, with a width of 50 mm, since the holding vacuum at the two outer suction holes 25 is turned off.

After adjusting or moving the threaded bushing 36 to the right stop 41 of the sliding bolt 30 is linearly displaced and the suction holes 25 are opened, so that a negative pressure is applied to these suction holes 25. This situation is in Fig. 2 shown. Due to the passage position of the control pin formed as a sliding bolt 30, it is possible a tipping paper with a greater width than in Fig. 1 to promote. For example, it is possible by means of the open outer suction holes 25 to transport tipping paper, for example, with a width of 64 mm.

In the context of the invention, it is possible to equip all the suction channels 16 of a tipping paper roll 10 with sliding bolts 30, so that the negative pressure at the outer suction holes 25 of each row of suction holes simultaneously on or off by means of the central adjusting element or the common threaded bushing 36.

LIST OF REFERENCE NUMBERS

10

Covering paper roll

15

suction bore

16

suction

18

axis of rotation

25

suction bore

30

sliding bolts

31

cavity

32

perforation

35

Bolt driving plate

36

threaded bushing

40

attack

41

attack

Claims (6)

1. Conveying drum (10) of the tobacco processing industry for cigarettes, filter pieces and components thereof, comprising suction bores (15, 25), which are arranged in rows on the circumference and may be acted upon by a partial vacuum, wherein at at least one suction bore (25) of a row the partial vacuum is disconnectable by means of a control element (30), wherein the control element (30) is longitudinally displaceable in a suction channel (16) connected to the suction bores (15, 25), wherein the partial vacuum at the at least one suction bore (25) is disconnectable or connectable by means of the longitudinal displacement movement of the control element (30), characterized in that the control element (30) takes the form of a hollow bolt (30).
2. Conveying drum (10) according to claim 1, characterized in that the control element (30) on the peripheral surface has through-holes (32) associated with the suction bores (15, 25).
3. Conveying drum (10) according to claim 1 or 2, characterized in that a plurality of suction channels (16) each have a longitudinally displaceable control element (30).
4. Conveying drum (10) according to one of claims 1 to 3, characterized in that a plurality of control elements (30) are displaceable by means of a displacement element (35, 36).
5. Conveying drum (10) according to one or more of claims 1 to 4, characterized in that the displacement element (35 36) is movable between two stops (40, 41).
6. Conveying drum (10) according to one or more of claims 1 to 5, characterized in that the conveying drum (10) takes the form of a cover paper cylinder (10).

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