EP3015006B1 - Rod-making machine in the tobacco processing industry with a thread emergency cutting device - Google Patents

Description

The invention relates to a filter-making machine comprising a rod making machine of the tobacco-processing industry with a thread-cutting device with a cutting element and a thread guide device, which specifies a threadline for a thread.

In the manufacture of filters or filter strands of the tobacco processing industry threads are sometimes introduced into a filter strand. The threads may be colored threads and / or flavored threads, ie, threads provided with a flavor. These are introduced, for example but not limited to the applications in the middle of a filter strand. The introduced threads may have a relatively high tensile strength of over 27.5 N, which could be endangered in the event that limbs of the operator entering the threadline are compromised. To avoid injury to the operating personnel, can be a protection be provided of the yarn path.

From the DE 40 16 964 A1 a yarn cutting device for a knitting or knitting machine is known. Before the occurrence of a thread break due to an increase in tension, the thread is severed at such a point conscious of where the free end of the thread is no longer drawn into the knitting area even when stopping the machine despite stopping the same, so that the knitting process can not idle.

It is an object of the present invention to safely protect operators when threads are to be introduced into a filter strand, the operators should be an efficient operation of the filter-making machine allows.

This object is achieved by a filter manufacturing machine, comprising a strand machine of the tobacco processing industry with a Fadennotschneidvorrichtung for a filter manufacturing machine comprising a rod maker of the tobacco processing industry with a cutting element and a thread guide device, which predetermines a threadline for a thread, which is further developed by the Cutting element and the thread guiding device cooperate so that when crossing a predetermined force acting on the thread, the yarn path intersects with an effective range of the cutting element.

By means of the filter production machine according to the invention, comprising a thread-cutting device, the operating personnel can be protected efficiently, without further protection of the yarn path being necessary.

Preferably, the Fadennotschneidvorrichtung is sensorless. It Thus, a force acting on the thread is not measured by means of a sensor in order then to initiate cutting of the thread via an evaluation device.

Preferably, the Fadennotschneidvorrichtung is mechanical, in particular completely mechanical. This preferably measure results in an extremely short reaction time, since an electronic control is avoided.

Preferably, the predetermined force is between 10 N and 22 N, in particular between 13 N and 17 N. In this way, impairments of the operating personnel or injuries to the operating personnel are completely avoided.

A particularly simple embodiment is given when the cutting element and / or the thread guide device is movably mounted or are. This makes it possible in a particularly simple and efficient manner to ensure that, starting from a presettable force acting on the thread, the threadline intersects with an effective region of the cutting element. Under movably supported in the context of the invention in particular slidably or pivotally supported understood.

Preferably, a deflection of the movement of the cutting element and / or the thread guiding device is provided, which is proportional to a force acting on the thread. In this case, the deflection of the movement of the cutting element and / or the thread guiding device becomes larger as the force acting on the thread increases. The provision of a proportionality between the force acting on the thread and the deflection of the movement of the cutting element and / or the thread guiding device leads to a very defined release of the Fadennotschneidvorrichtung and a correspondingly defined cut.

Preferably, when the predeterminable force is exceeded, a speed gradient of a movement of the cutting element and / or the thread guiding device increases, or a movement of the cutting element and / or the thread guiding device takes place only when the predeterminable force is exceeded. In this way, in particular, an abrupt or sudden movement is achieved in the moment in which the predeterminable force is reached, resulting in a very fast movement of the cutting element and / or the thread guiding device for this case, so that with a very fast movement, a crossing of Threadline with the effective range of the cutting element results. This makes a very safe cut possible.

Preferably, a return device is provided, which moves back the cutting element and / or the thread guide device in its initial position. As a result, the cutting element and / or the thread guide device are brought back into their initial position or offset, in particular when no force acts on the thread or this was cut.

If a holding device is preferably provided for achieving a speed gradient which increases from the predeterminable force, which mechanically or magnetically holds the cutting element or the thread guiding device essentially in its initial position until the predetermined force is reached, and the holding device releases or reaches from the predeterminable force the holding device triggers the movement of the cutting element and / or the thread guide device, a very safe cutting of the thread is possible.

The holding device may in this case be configured mechanically, for example as a latching device.

It may also be provided a magnetic holding device, in which a magnetic force is exceeded after reaching the predetermined force, so that a magnet, for example, dissolves from another element.

In particular, preferably, the holding device allows a non-destructive release of the holding, which is preferably repeatable. It can also be chosen a variant in which a deliberate destruction of an element is provided. For example, a notched rod may be provided, which breaks from the predetermined force acting on the thread. In order to then put the thread cutting device back into operation, a new notched bar must be used accordingly.

Preferably, the thread guide device comprises at least one, in particular two, elastically mounted thread guide rollers. When using two elastically mounted thread guide rollers a particularly accurate guidance is possible. Here, for example, be thought of a leaf spring on which one or two yarn guide rollers are arranged, wherein upon action of a corresponding force on the thread, the leaf spring is loaded with this force and bends accordingly, causing the yarn path changed.

Preferably, the cutting element is elastically supported together with at least one yarn guide roller, in particular two yarn guide rollers. This also leads to a very precise guidance of the cutting element.

The guidance is very accurate, if at least preferably a yarn guide roller, in particular two yarn guide rollers, the yarn guide device is mounted on a linearly movable sliding plate or are.

Preferably, the sliding plate is movable against a spring force. Preferably, the cutting element is then provided stationary.

In another preferred embodiment, the cutting element is connected to a linearly movable sliding plate. Preferably, the slide plate is designed to be movable against a spring force. For the preferred embodiment, in which the cutting element is connected to a linearly movable sliding plate, the cutting element then moves in the presence of a corresponding force on the thread against the thread. The spring force preferably acts against this movement. The spring force is in this case preferably adjusted so that at the predetermined force acting on the thread and at which the thread is to be cut, the cutting element is moved so far to the thread or yarn path that the thread is cut.

Preferably, the cutting element has a cutting edge, which is aligned obliquely against a running direction of the thread during the cutting of the thread or is oriented perpendicular to the running direction of the thread. This makes a safe cut possible.

Further features of the invention will become apparent from the description of embodiments according to the invention together with the claims and the accompanying drawings. Embodiments of the invention may satisfy individual features or a combination of several features.

Fig. 1:

eine schematische Darstellung einer Fadennotschneidvorrichtung in einer ersten Ausführungsform,

Fig. 2:

eine schematische Darstellung einer Fadennotschneidvorrichtung in einer zweiten Ausführungsform,

Fig. 3:

eine schematische dreidimensionale Darstellung einer Fadennotschneidvorrichtung in einer dritten Ausführungsform,

Fig. 4:

eine schematische dreidimensionale Darstellung der Ausführungsform gemäß Fig. 3 nach Einwirken einer entsprechenden Kraft auf den Faden,

Fig. 5:

eine schematische dreidimensionale Darstellung einer weiteren erfindungsgemäßen Fadennotschneidvorrichtung und

Fig. 6:

eine schematische Darstellung einer Haltevorrichtung in verschiedenen Lagen.

The invention will hereinafter be understood without limitation of the general The invention is described with reference to exemplary embodiments with reference to the drawings, reference being expressly made to the drawings with regard to all details of the invention which are not explained in greater detail in the text. Show it:

Fig. 1:

a schematic representation of a Fadennotschneidvorrichtung in a first embodiment,

Fig. 2:

a schematic representation of a Fadennotschneidvorrichtung in a second embodiment,

3:

a schematic three-dimensional representation of a Fadennotschneidvorrichtung in a third embodiment,

4:

a schematic three-dimensional view of the embodiment according to Fig. 3 after applying a corresponding force to the thread,

Fig. 5:

a schematic three-dimensional representation of another Fadennotschneidvorrichtung invention and

Fig. 6:

a schematic representation of a holding device in different positions.

In the drawings, the same or similar elements and / or parts are provided with the same reference numerals, so that apart from a new idea each.

Fig. 1 schematically shows a Fadennotschneidvorrichtung invention 10. On a base plate 21, two yarn guide rollers 13 and 16 are fixedly mounted. In addition, two yarn guide rollers 14 and 15 are mounted on a leaf spring 20. The leaf spring 20 is connected quite centrally with the base plate 21. It is also shown a stationary cutting element 11 with a cutting edge 19 which is stationary to the base plate 21. In addition, a thread 18 is guided around the thread guide rollers 13, 14, 15 and 16, so that a thread run 17 results in particular between the two thread guide rollers 14 and 15.

The thread 18 can be guided, for example, from right to left or from left to right. In this embodiment, a movement from right to left is assumed. The thread 18 is thus introduced on the left side of the yarn guide roller 16 in a filter strand, not shown. The filter strand may be, for example, a cellulose acetate filter. This is a corresponding filter strand machine left side at the Fig. 1 to arrange. In a filter rod machine, a corresponding filter strand is formed in a longitudinal axial conveying of filter material.

Now, for example, if a finger of an operator on the right side of the Fadennotschneidvorrichtung 10 entangled with the thread 18, a relatively large force on the thread will act relatively quickly, since relatively large conveying speeds of the filter strand and thus also the thread to be introduced prevail, for example, 500 m per minute. The force acting on the finger and thus acting on the thread force is thus rapidly increasing in time, causing the leaf spring 20 and the leaf spring 20, the yarn guide rollers 14 and 15 move down until the yarn path 17 in the effective range of the cutting edge 19th passes and the thread 18 is cut. As a result, the thread is relieved very quickly, whereby the operator is protected.

Fig. 2 schematically shows another Fadennotschneidvorrichtung 10. In this case, no leaf spring is used, but the configuration is such that the yarn guide rollers 14 and 15 on a yarn guide device 12 comprising a slide plate 23 and the two yarn guide rollers 14 and 15 are provided. The sliding plate 23 moves at a corresponding force acting on the thread 18, down against the spring 22. From a correspondingly large predetermined force, which is adjustable or selectable on the spring or spring constant, the threadline 17 enters the effective range of Cutting elements 11, which is again fixedly mounted relative to the base plate 21. As a result, the thread is cut accordingly.

The thread guide rollers 13 and 16 are in this embodiment also fixedly arranged on the base plate 21.

As an alternative to the embodiments according to FIGS Fig. 1 and 2 can also all thread guide rollers 13 to 16 be stationary to the base plate 21 and the cutting element 11 may be movably provided, for example, arranged on a leaf spring or on a sliding plate.

In the event that the arrangement of those from the Fig. 1 and 2 corresponds, the configuration may be such that the cutting element 11 is fixed relative to the yarn guide rollers 13 and 16 and the yarn guide rollers 13 and 16 move in accordance with these forces acting upwards.

It can also be provided between the thread guide rollers 14 and 15 further yarn guide rollers, which are arranged below and between the yarn guide rollers 14 and 15. For this case, then the cutting element 11 could, for example, in the embodiment in Fig. 2 with a cutting edge 19, which is directed downwards, with the thread guide rollers 14 and 15 move down and accordingly cut a thread which is arranged in a yarn path 17 below.

Fig. 3 shows schematically in a three-dimensional representation of a further inventive embodiment of the Fadennotschneidvorrichtung. Again, a leaf spring 20 is used. It is a similar constellation as in the embodiment according to FIG Fig. 1 given. On the one hand, a threadline 17 is shown from left to right. In addition, force arrows or forces 27 and 28 are shown, which act at a corresponding blockage of the thread 18.

The cutting element 11 has a cutting edge 19 which is not as in Fig. 1 or 2 is perpendicular to the yarn path, but is directed obliquely against the conveying direction 26 and against the yarn path 17.

In Fig. 3 It is shown how the elements of the Fadennotschneidvorrichtung 10 are arranged relative to each other when no force is exerted or only a small force is applied. With a correspondingly large force, which corresponds to the predeterminable force, the leaf spring 20 bends downwards and with the leaf spring, the thread guide rollers 14 and 15 are moved downward. This is in Fig. 4 shown schematically. In this relative orientation of the elements to each other, the thread 18 is cut.

It is also in FIG. 3 and FIG. 4 still a Verschutzung 25 of the knife shown so that operators can not cut on the cutting edge 19.

Fig. 5 shows in a three-dimensional schematic representation of another embodiment of the invention Fadennotschneidvorrichtung similar to that of Fig. 2 is. Here are the thread guide rollers 14 and 15 which are arranged on a sliding plate 23, slightly obliquely offset from each other, that is not horizontally disposed at the same height. The sliding plate 23 is pressed in guides vertically down according to an applied force, against a spring 22. From the predetermined one of the force acting on the thread, not shown, the thread is cut with the cutting edge 19 of the cutting element 11. The orientation of the thread guide rollers 13 and 16 is due to the upstream or downstream elements. This can also look different depending on your needs.

It can also be in the Fig. 1 to 5 Protective measures not shown to be provided to a plastic bending of the resilient Elements, such as the leaf spring 20 to avoid. For example, end positions can be predetermined in order to avoid accidental overloading of the leaf spring 20 and thus premature release of the fiber-cutting device. On the other hand, a limitation of the upward movement may also be provided, in order to avoid generating an upward plastic deformation of the leaf spring which would ensure that the thread would only be cut if the force was too great.

It can also be provided that no continuous movement of the yarn guide device or a part of the yarn guide device is made relative to the cutting element, but an abrupt or sudden movement. For example, a holding device 29 may be provided, which ensures that the sliding plate 23, for example, only moves above a certain force to be exceeded. For this purpose, for example, a magnet not shown in the figures can be provided, which holds the sliding plate 23 in the starting position with a corresponding holding force. Alternatively or additionally, an embodiment may be provided in which a locking device is used, as this example, in Fig. 6 is indicated schematically.

In Fig. 6 schematically a corresponding holding device 29 is shown, in two different positions. There is an upper position in which the slide plate 23 is shown schematically with a solid line. On the slide plate 23, a spring pressure piece 32 is arranged, in which a ball 34 is mounted against a spring 35 and protrudes from the spring pressure piece 32. With a corresponding force acting on the sliding plate 23 down, the ball 34 slides along the inclined plane 33 to the moment where the ball 34, the inclined ramp 33 completely is slid along and is completely pressed into the spring pressure piece 32. At this moment, an abrupt movement down to a second position, in which the slide plate 23 is shown in dashed lines. This is in the lower illustration of Fig. 6 shown.

In a holding device gem. Fig. 6 At first, the sliding plate 23 moves very little, that is to say with a slight deflection, downwards, in order then, abruptly, to move downwards after reaching a corresponding predeterminable force and to permit a cutting of the thread.

Preferably, the cutting edge 19 of the cutting element 11 is formed obliquely to the yarn path 17, so that moves at an operative connection of the yarn with the cutting edge of the thread along the cutting edge during cutting.

Instead of the thread guide rollers, other deflection elements can be provided. For example, deflection rods may be provided, which preferably have a very smooth surface in order to avoid or reduce friction of the thread on the contact surface. Instead of the leaf spring or the spiral spring, which is used in the embodiments, other elements can be used, such as pneumatic cylinders. It can be both a continuous or proportional movement, namely provided in proportion to the existing force or a sudden movement.

As magnets for holding the movable elements or a movable element permanent magnets or electromagnets can be used.

There may be provided a corresponding triggering mechanism for abrupt or abrupt or sudden movement based on the destruction of the triggering mechanism, for example by an abrupt failure of a notched shear bolt, belt or blade. A provision of the yarn path 17 and the corresponding elements that specify the yarn path 17, then takes place only after the onset of a new trigger element by the operator.

LIST OF REFERENCE NUMBERS

10

Fadennotschneidvorrichtung

11

cutting element

12

Yarn guiding device

13

Yarn guiding role

14

Yarn guiding role

15

Yarn guiding role

16

Yarn guiding role

17

yarn path

18

thread

19

cutting edge

20

leaf spring

21

baseplate

22

feather

23

sliding plate

25

Verschutzung

26

conveying direction

27, 28

force

29

holder

30

feather

31

Bullet

32

Spring thrust piece

33

inclined plane

34

Bullet

35

feather

Claims (13)

1. A filter-manufacturing machine comprising a rod-making machine of the tobacco processing industry having a thread emergency cutting apparatus (10) having a cutting element (11) and a thread-guiding apparatus (12), which predefines a thread path (17) for a thread (18), characterized in that the cutting element (11) and the thread-guiding apparatus (12) cooperate such that, when a predefinable force acting on the thread (18) is exceeded, the thread path (17) intersects an operating region of the cutting element (11).
2. The filter-manufacturing machine according to claim 1, characterized in that the thread emergency cutting apparatus (10) is mechanical.
3. The filter-manufacturing machine according to claim 1 or 2, characterized in that the predefinable force is between 10 N and 22 N, in particular between 13 N and 17 N.
4. The filter-manufacturing machine according to any one of claims 1 to 3, characterized in that the cutting element (11) and/or the thread-guiding apparatus (12) is/are movably mounted.
5. The filter-manufacturing machine according to claim 4, characterized in that a deflection of the movement of the cutting element (11) and/or thread-guiding apparatus (12) that is proportional to a force acting on the thread (18) is provided.
6. The filter-manufacturing machine according to claim 4, characterized in that, when the predefinable force is exceeded, a velocity gradient of a movement of the cutting element (11) and/or thread-guiding apparatus (12) increases, or only when the predefinable force is exceeded does a movement of the cutting element (11) and/or thread-guiding apparatus (12) take place.
7. The filter-manufacturing machine according to any one of claims 1 to 6, characterized in that a return apparatus (20, 22) is provided which moves the cutting element (11) and/or the thread-guiding apparatus (12) into the starting position thereof.
8. The filter-manufacturing machine according to claim 6 or 7, characterized in that, in order to achieve a velocity gradient that increases from the predefinable force, a holding apparatus (29) is provided which mechanically or magnetically holds the cutting element (11) or the thread-guiding apparatus (12) substantially in the starting position thereof until the predefinable force is reached, and once the predefinable force is reached, the holding apparatus (29) triggers the movement of the cutting element (11) and/or thread-guiding apparatus (12).
9. The filter-manufacturing machine according to any one of claims 1 to 8, characterized in that the thread-guiding apparatus (12) comprises at least one, in particular two, resiliently mounted thread-guiding rollers (13, 16).
10. The filter-manufacturing machine according to any one of claims 1 to 9, characterized in that the cutting element (11) is resiliently mounted together with at least one, in particular two, thread-guiding rollers (13, 16).
11. The filter-manufacturing machine according to any one of claims 1 to 10, characterized in that at least one thread-guiding roller (13, 16), in particular two thread-guiding rollers (13, 16), of the thread-guiding apparatus (12) is or becomes mounted on a linearly movable sliding plate (23).
12. The filter-manufacturing machine according to any one of claims 1 to 11, characterized in that the cutting element (11) is connected to a linearly movable sliding plate (23).
13. The filter-manufacturing machine according to any one of claims 1 to 12, characterized in that the cutting element (11) comprises a blade (19) that is oriented obliquely against the direction of travel (26) of the thread (18) when the thread (18) is cut or oriented perpendicularly to the direction of travel (26) of the thread (18).

Images