DE2138835B2 - DEVICE FOR THE AXIAL SEPARATION OF CIGARETTES LAYING BACK INTO ITS LONGITUDINAL DIRECTION - Google Patents

Description

45

The invention relates to a device for the axial separation of those lying one behind the other in their longitudinal direction Cigarettes at the exit of a continuously operating cigarette making machine by means of at least a rotatably driven rotating body, which with its circumference with one cigarette to be secreted interacts.

The cigarette machines currently in operation provide a straight, endless strand which is cut into pieces of equal length and, after cutting, becomes a row with theirs Front faces of touching cigarettes moved forward. These cigarettes are then placed on a conveyor belt or a drum having recesses lined up. In most cases, however, you have to do this the cigarettes butting together at their ends are axially separated from one another by up to several centimeters will. For this purpose, the cigarette furthest forward is placed opposite the Strand speed accelerated.

In known devices, however, this acceleration acts suddenly on the cigarette to be secreted because a rotating part is used for acceleration, its constant peripheral speed is greater than the speed of advance of the cigarette and suddenly increases with the rate to be secreted Cigarette brought into contact w.rd. As a result, a shock is applied to the cigarette. aside from that the accelerating part is worn down due to the start of each acceleration process slip occurring regularly between the cigarette and the device part. These disadvantages occur in the cigarette machines currently in use that produce several thousand cigarettes per minute produce, very annoying in appearance.

There are also known devices for separating cigarettes from a continuously moving cigarette rod in the longitudinal direction, by means of which the cigarettes are successively removed in a direction transverse to the longitudinal direction of the rod and placed side by side on a conveyor belt or a conveyor drum. In one of these devices are for this purpose aui one strand side arranged, used circumferential cams, whose radius gets larger around the circumference of the cam discs (DT-PS 6 00 436) Here, the hir side abzusondernden ^Z: garjtten placed on a conveyor belt which compared to the strand conveyor belt is driven at a higher speed. In another such device for lateral separation, the cigarettes are picked up by a suction head which is formed on the coupling of a double rocker, the crank arms of which rotate at a constant angular speed (DT-PS 3 43 770). The drive speed should be such that the coupling moves when the cigarette is picked up at a speed in its longitudinal direction which is greater than the line speed. In both cases, the cigarette to be separated is suddenly accelerated, which leads to the disadvantages mentioned above.

In another known device of the type mentioned (DT-PS 5 57 707) the Cigarettes from the strand are deposited in two rows running in the longitudinal direction of the cigarettes, in which the individual cigarettes in each row are axially spaced from one another. There are two revolving, circular grooved disks used, which grasp the cigarette in the gap between them and which are eccentrically mounted in such a way that in a selected position of the disks the smallest of of the bearing axis measured radius of one pulley with the largest radius of the other Grooved pulley meets. The pulleys are driven at a constant angular speed. In this known device, however, depending on the instantaneous position of the pulleys only every second cigarette is axially accelerated relative to the advancing speed of the strand. the axial speed component of the intermediate cigarettes, however, is smaller than that Strand speed. With this known device, an only axially occurring Do not achieve secreting the cigarettes.

In contrast, the object is achieved by the invention for the axial separation of in their longitudinal direction consecutive cigarettes to create a device in which the acceleration of the cigarette to be secreted takes place gradually.

This is achieved according to the invention with a device of the type mentioned in that the Rotary body designed as a circular sector in cross section, mounted in the center of the circle and eccentrically by means of a mounted to the center of the circle, in a radial groove of the rotating body or one with this connected drive pulley slidably engaging crank is driven.

This makes it possible to give the revolving circular sector a peripheral speed, which is equal to the advance speed of the cigarette to be separated as soon as the sector of the circle starts with this comes into contact, the peripheral speed of which, however, then becomes increasingly greater.

As a result, even with high-speed cigarette manufacturing machines, there is a need for segregation The impact of cigarettes and the resulting signs of wear and tear are avoided.

Refinements of the invention are the subject of the subclaims.

The drawings show an embodiment of the invention. It shows

F i g. 1 a schematic representation of the accelerator,

F i g. 2 shows the curve of the change in Speed of rotation of the accelerator,

F i g. 3 a schematic plan view of the device;

4 shows a partly in section partly in side view Representation shown, with parts broken away.

The on fig. 1 shown accelerator consists of a disc 1 with the center O, that of two Semicircular arcs 2 and 3 of different diameters is limited. It is through the crank pin 4 a Crank disk 5, which rotates around the center Oi, is set in rotation around the center O. Of the The crank pin 4 engages in a radial groove 6 provided in the first disk 1.

If r is the distance of the crank pin 4 from the center Oi of the crank disk 5 and e is the eccentricity of this center Oi relative to the center O of the disk 1 and if <% and β are the angles that connect the crank pin 4 to the centers Oi and O. Form straight lines with the line 0Oi, the following equation can be set up in a simple way:

df

/ · (('+ L'COSr /) d «

r + ί ' ² + 2 er cos «di

As this equation shows, the current speed of rotation of the crank pin 4 increases the center O gradually from a minimum to a maximum and then increases systematically off again. The same applies to all points of the first disc 1.

The minimum corresponds to «= O and is the same

d ti. r there

■ -, - min = -

al (r + e) el /

you
d7

The maximum corresponds to α = 180 ° and is the same

; · Dr. I d. <

d / (

d; ir - c) di

c d / '
r

Fi et. 2 shows the curve of the value of the ratio - ¹ J " for a given round e, when the angle *

changes from 0 to 180 °. The curve shows that the acceleration is extremely progressive. With the help of such an accelerator, the speed of the cigarette can be increased progressively up to the desired value. It is only necessary to choose the ratio elr accordingly.

Then the radius R of the accelerator, i.e. the

ίο circular arc 2, to be selected so that the lowest speed of the accelerator is equal to the feed speed of the cigarettes of length L before the acceleration. This condition requires the equation

is determined by the R.

The accelerator works at most on half of its path corresponding to the arc 2 with the constant radius R. During the other half it remains unused. The crank pin 4 must therefore rotate so fast that its revolutions per minute are equal to the number of cigarettes produced per minute.

Such an accelerator can be used in such a way that the behind the cutting device (not shown) butting against each other and advancing in a channel-shaped channel 8 in the direction of the arrow Cigarettes between two identically designed accelerator rollers 9 and 10 of the FIG. 1 shown Type are introduced.

These accelerator rollers have a frustoconical, active sector 2 and an inactive sector 3, which can also be frustoconical. They are each attached to the end of an axis 11 which is inclined from the vertical by an angle which is equal to half the apex angle of the truncated cone of the rollers, so that the generators AB and CD of the rollers are perpendicular.

The axle 11 on which the roller 9 is attached, carries a disc 12 with a radial groove 13 in which a crank pin 15 carried by the crank pin Rolling bearing 14 is seated. The crank pin 15 is fastened to a crank disk 16 mounted on a shaft 17. The axes of the shafts 11 and 17 are arranged eccentrically to one another by the value e.

The roller 10 is also mounted on a shaft 18, which has the same device as between the Shafts 11 and 17 is provided, is driven by the shaft 19.

The shafts 17 and 19 are driven by a common shaft 20 via two pairs of worm gears 21-22 (shaft

17) and 23-24 (shaft 19) are driven. The shaft 20 is in mounted on a holder 25 and rotated by a ribbed belt that supports the Pulley 26 drives. The number of revolutions of the shafts 20, 17 and 19 per minute is equal to the number of cigarettes produced per minute.

The holder 27 of the shafts 11 and 17 and the holder 28 the shafts 18 and 19 are attached to the holder 25 and can be on this in a horizontal direction slide perpendicular to the axis of the cigarette 7.

The holder 25 is mounted on a stationary holder 29 in which it can be displaced vertically.

To adjust the distance between the rollers 9 and 10 to the respective diameter of the cigarette

the holders 27 and 28 are pushed forwards or backwards on the holder 25 and blocked in the correct position.

To set the correct diameter R of the accelerator rollers, the holder 25 is raised or lowered relative to the stationary holder 29 and blocked in the correct position.

The rollers mounted at the end of axles 11 and 18 9 and 10 can be rotated about these axes that the point of application of sector 2 of the target opposite the front end of the cigarette can be eing.

The invention is not limited to the embodiment described above, but allows z; before changes to.

For this purpose 2 sheets of paper

Claims (7)

Patent claims: 1. Device for the axial separation of cigarettes lying one behind the other in their longitudinal direction at the exit of a continuously operating cigarette manufacturing machine by means of at least one rotatably driven rotating body, which cooperates with its circumference with one cigarette to be separated, characterized in that the rotating body (1,9, 10) designed in cross section as a circular sector, mounted in the center of the circle (O) and by means of a crank (4) which is mounted eccentrically to the center of the circle and slides into a radial groove (6, 13) of the rotating body (1) or a drive pulley (12) connected to it, 15) is driven. 2. Apparatus according to claim 1, characterized in that the rotating body as a frustoconical Roller (9,10) is formed, the axis of rotation of which forms an angle with the vertical which corresponds to the corresponds to half the opening angle of the truncated cone, and on the axis of rotation through the Crank (15) driven drive pulley (12) is seated. 3. Device according to claim 1 or 2, characterized by two symmetrical to a perpendicular, rotating bodies (9, 10) arranged one behind the other and containing the plane containing cigarettes are designed and driven the same. 4. Apparatus according to claim 3, characterized in that the two rotating bodies (9,10) are parallel are adjustable to the vertical. 5. Apparatus according to claim 3 or 4, characterized in that the two rotating bodies (9, 10) are adjustable parallel to the horizontal. 6. Device according to one of claims 1 to 5, characterized in that each of the rotating body (1, 9, 10) in cross-section made up of a semi-circular active circular sector (2) and a the cross-section complementary, inactive circular sector (3) with a smaller radius. 7. Apparatus according to claim 6, characterized in that each of the rotating body (9,10) on its Rotation axis is rotatably adjustable.