WO2010043725A2

WO2010043725A2 - Rotating filling machine

Info

Publication number: WO2010043725A2
Application number: PCT/EP2009/064298
Authority: WO
Inventors: Willi VOLLENKÄMPER
Original assignee: Haver & Boecker Ohg
Priority date: 2008-10-06
Filing date: 2009-10-29
Publication date: 2010-04-22
Also published as: DE202008013097U1; WO2010043725A3

Abstract

The invention relates to a rotating filling machine (1) for filling valve bags (4), comprising a driven rotor (2) that rotates about a vertical axis, said rotor comprising a plurality of fill aggregates, each of which is equipped with a fill pipe (3) and a bag stool (7) for supporting the valve bags (4), each of said bag stools pivoting about a horizontal axis (6) by way of a drive, wherein each drive comprises at least one controllable electromechanical drive unit (10, 11, 12, 13, 14, 17, 18) with at least one rotatable or linearly displaceable driven member (14, 18) that is coupled to the bag stool (7).

Description

Rotating filling machine

The invention relates to a rotary filling machine for filling valve bags, having a rotatably driven about a vertical axis rotor with a plurality of filling units, each equipped with a filling tube and for supporting the valve bags with a bag chair, each by means of a drive to a horizontal Axis are pivotable.

Rotary filling machines of the type described above are used for filling of filling goods in valve bags. Depending on the type of filling material, dust may form during filling in the valve bags.

The prior art, DE 198 57 476 A 1, DE 34 00 154 C2, the

EP 07 64 584 A2, DE 33 09 163 C1, DE 17 61 727 A and DE 10 2007 002 381 A1.

Depending on the required performance of the rotary filling machine, the rotor is equipped with several filling units which are mounted adjacent to the wall of the rotor. The filling tubes and the bag chairs are designed so that, after attaching the valve bag to the respective filling tube, the filling bag is supported on the bag chair. This sack chair consists of two upright, parallel and spaced-apart spars, wherein the filling tube is arranged centrally to these two spars and a fixed to the spars support shell.

The horizontal axis lies in the region facing away from the filling tube, so that after the final filling of the valve bag by a pivoting movement of the bag chair, the valve of the valve bag is withdrawn from the filling tube. The removal of the filled valve bag is also referred to as dropping. Immediately after dropping the valve bag from the bag chair this is in the

Filling position pivoted back, so that by means of a slip-on the filling tube is equipped with an empty valve bag. Typically, the sack chair is coupled to a weighing device that controls the filling process such that after a rotation of the rotor by an angle of almost 360 °, the filling process is completed. However, it is determined that the target weight is not yet However, if it is determined that the target weight has not yet been reached, the filling process is optionally continued in another revolution.

The removal of the deducted from the filling tubes valve bags is carried out by a discharge belt. Usually, this discharge belt is radially to the rotor of the rotary filling machine. The performance of the rotary filling machine is constantly increasing. It follows that the Abwυrfstelle changes due to the insufficient adjustability of the throttle screws on the pneumatic cylinders, so that at intervals a readjustment of the pneumatic cylinder is necessary.

In the case of the relatively high performance of a rotating filling machine, it is imperative that the discharge points of the valve bags are constant with respect to the discharge belt or are variable only within narrow limits.

In the previously known rotating filling machines are used as drives for the

Sack chairs used via valves controlled pneumatic cylinders. These designs have proven successful, but are associated with the disadvantage that is used as a working fluid for each cylinder compressed air. The use of compressed air as a working fluid requires control by throttle screws attached to the pneumatic cylinders. These throttle screws must be adjusted individually, so that the time required for this is relatively high. In addition, pneumatic cylinders have the property that, depending on the degree of soiling and wear, the traversing speed and the response time change, so that readjustment is required at certain time intervals. If the contents to be filled during filling to a

Determinate, the pneumatic cylinder are subject to additional wear.

The invention has for its object to design a rotating filling machine of the kind described in more detail so that no readjustments of the drives for the bag chairs are necessary over a longer period, and that in addition to pneumatically operating drives can be omitted. The stated object is achieved in that each drive has at least one controllable electromechanical drive unit with at least one rotatable or with a linearly movable output member which is coupled to the bag chair.

The drive connection between the drive motor of the electromechanical / motor drive unit and the sack chair, despite the unavoidable contamination by dust, which can lead to deposits, always ensures that even over a relatively long service life of the rotary filling machine, the discharge point for the filled valve bags unchanged remains, so that the reproducibility of the discharge point against the discharge belt is ensured.

As a result, the operational reliability of the rotating filling machine and thus also the availability is increased, so that overall the rotating filling machine can be operated more economically. It eliminates the previously necessary work for the readjustment of the pneumatic cylinder. In addition, the drive units are also inexpensive.

According to a first constructive solution is provided that the electromechanical drive unit see is equipped with a housing having a geared motor with an intermediate shaft standing transversely to the motor shaft, on which a crank is rotatably mounted on at least one opposite the housing projecting end.

Geared motors are commercially available components that are offered inexpensively by relevant manufacturers. In addition, they are sealed, so that the components are protected against the dust loads. The geared motor consists in a preferred embodiment of a drive motor and a bevel gear coupled thereto, so that the intermediate shaft is perpendicular to the axis of rotation of the motor. This creates favorable conditions for the installation of the drive units in the rotating filling machine. The at least one relative to the housing projecting end portion rotatably mounted crank then forms the rotatable output member of the drive unit, which is connected in a manner explained in more detail with the bag chair. Usually, each sack chair has two parallel and spaced apart and upright uprights. At this Holmen a bag shell or a saddle is arranged to support the valve bags at a distance from the filling tube, wherein a guide of the valve bag is achieved by the shell shape. So that no torque is transmitted to the sack chair by the forces generated by the drive unit, it is provided in a further embodiment that the intermediate shaft projecting with two end regions relative to the housing of the geared motor, and that in each case a crank is mounted rotatably on these two end regions. Each crank is connected to a spar. The geared motor is in this embodiment between the bars, so that even a compact design is achieved.

In a structurally simple manner, it is provided that each crank is pivotally connected via a coupling rod with the associated upstanding spar of the bag chair. In order to adjust the swing angle of the bag chair exactly, it is provided that each coupling rod is adjustable in length. This is done for example via an adjusting nut.

If the drive unit is equipped with one or two cranks, the control of the geared motor can be designed such that the crank can be driven cyclically, i.e. at the discharge point it is rotated by an angle such that the valve bag is dropped off. Immediately thereafter, the bag chair is swung back into the filling position by a corresponding movement of the crank or the cranks, so that an empty bag can be pushed onto the filling tube.

The controller may be configured to rotate the crank or cranks through an angle of 180 ° to pivot the bag chair from the filling position to the discharge position. After the valve bag has been dropped off, the crank can be rotated further in the same direction of rotation by an angle of 180 °, or it can be driven in the opposite direction. According to another preferred design solution, it is provided that the drive unit consists of at least one electromechanical linear drive. Such linear drives are referred to in the drive technology as El ektr 02 y linder or rod drives.

In preferred embodiments, such linear drives are provided as spindle drives with a rotationally drivable spindle of a mounted thereon, secured against rotation adjusting nut and a fixedly connected to the adjusting actuator rod. The actuating rod forms the output member in such linear drives. The linear drive is further equipped with a drive motor and with a arranged between the spindle and the drive motor Drehzahlreduziergetriebe. In the standard version, the linear drives are equipped so that the axis of rotation of the spindle is aligned with the axis of rotation of the drive motor.

In the inventive rotary filling machine each bag chair can be driven by an electromechanical linear drive. In this embodiment, then the two spars are coupled together via a Queitraverse, wherein the actuating rod is articulated thereto in the central region. Alternatively, however, it is also possible for an e-electromechanical linear drive to be articulated on each upright stile of the bag stool.

Thus, regardless of the design of the drive unit, the drive power is relatively low, it is provided that the pivot axis of the bag chair is on the side facing away from the filling tube and at a distance from the support saddle. As a result, relatively large lever arms between the pivot axis and the coupling rods or the B etätigungs rods of the drive units are achieved ei.

So that by the weight of the filling valve bag still no tilting moment acts on the pivot axis forming components, it is provided that the

Pivot axis of the bag chair at such a distance from the upright spars is that the pivot axis lies in the central region below the support saddle. In a preferred embodiment is still provided that at each upright Holm of the bag chair a boom is attached, which is pivotally connected to an attached to stationary components of the rotor tabs.

Reference to the accompanying drawings, the invention will be explained in more detail.

Show it:

Figure 1 is a schematic diagram in a plan view of a plant for filling

Valve bags, with only the rotating filling machine and the discharge belt are shown

FIG. 2 shows a drive equipped with a geared motor, viewed in a perspective view from the axis of rotation of the rotor, in the filling position of the bag chair

Figure 3 is a representation corresponding to Figure 2, but seen from the discharge belt view

Figure 4 is a representation corresponding to Figure 3 However, the bag chair in the discharge position showing Figure 5 is a representation corresponding to Figure 4, but viewed from the axis of rotation of the rotor of Figure 6 shows the drive for the bag chair with a linear drive with

View seen from the discharge belt seen in the filling position of the valve bag and Figure 7 is a representation corresponding to Figure 6, but showing the bag chair in the discharge position.

The plant shown in Figure 1 for filling valve bags consists of a rotating drivable filling machine 1 with a rotor 2 to which in the illustrated embodiment twelve radially outwardly facing filling tubes 3 are attached, each of which is a component of a filling device not further explained. The valve sacks 4, which are likewise not explained in further detail, are plugged onto the filling tubes 3 by means of a plug-in device which is not illustrated and explained, as indicated by the arrow A. During the circulation in the direction of arrow B, these valve bags 4 are filled. The system also includes a trained as a belt conveyor discharge belt 5, to which the filled valve bags 4 are dropped in the manner explained in more detail, as indicated by the arrow C.

Figures 2 to 7 show that each filling unit of the rotary filling machine 1 is still equipped with a pivotable about a horizontal axis 6 blind chair 7, the essential components of which form two upright uprights 8 and a support shell 9.

FIGS. 2 to 5 show the drive units for the tilting movements of the

Sack chair 7 in a first embodiment. Thereafter, this drive unit consists of a gear motor 10, which consists of a drive motor 1 1 and a gear 12, preferably in the form of a bevel gear. The figures show that the gear motor 10 is arranged centrally between the two upright spars 8 of the bag chair 7 on the side facing away from the filling tube 3 on the rotor 2 stationary. In particular, Figures 2 and 5 show that the geared motor 10 is provided with a transversely or at right angles to the rotational axis of the motor 1 1 standing intermediate shaft 13.

The end portions of this intermediate shaft 13 are opposite to the housing of the transmission 12. In each case a crank 14 is mounted rotatably on these end regions. These cranks 14 form the output members of the electromechanical drive unit. The cranks are articulated via connecting rods 15 with the upright spars 8 of the bag chair 7.

Figures 2 and 3 show the plugged onto the filling tube 3 valve bag 4 during the filling position or shortly before dropping from the filling tube 3 and the bag chair 7. In this position, the upright spars 8 of the bag chair 7 are perpendicular and parallel to stationary bars 16 of the Rotor 2. The cranks 14 are in the retracted position. To initiate the discarding of the valve bag

4, the gear motor 10 is driven, whereby the cranks 14 are pivoted through an angle of 180 °, as shown in Figures 4 and 5 show. The upright spars 8 are then at an acute angle to the stationary bars 16 of the rotor 2. The timing of the control of the geared motor 10 and thus also the discharge point can be set extremely accurately and do not change in the course of operation of the rotating filling machine 1. After sliding the filled valve bag 4 of the support shell 9 of the geared motor 10 is driven again, so that either the cranks 14 are rotated in the same direction by an angle of 180 °, or they are rotated by an angle of 180 ° in the opposite direction, so that the filling position of the bag chair 7 shown in Figure 2 is taken again.

Figures 6 and 7 show a further embodiment of the drive unit for tilting the bag chair 7. In a manner not shown is at each upright

Holm 8 of the sack chair 7 each articulated an electromechanical drive unit 17, which is designed as a linear drive, and has a retractable and extendable actuating rod 18. This electromechanical drive unit 17 is referred to as an electric cylinder or rod drive and is designed as a spindle drive. Such electromechanical drive units are known and are therefore not shown as a detail.

Contrary to the embodiment according to FIGS. 6 and 7, only one electromechanical drive unit could be articulated on each bag chair 7. The two upright spars 8 are connected to one another via a cross-member, wherein the actuating rod 18 of the electromechanical drive unit 17 is articulated centrally.

Also in this embodiment, the drive motor of the electric motor drive unit 17 is driven at a time that ensures that the valve bag 4 is dropped at a predetermined location of the bag chair 7. After this

Dropping the valve bag 4, the direction of rotation reversible drive motor is driven again, so that the bag chair 7 is pivoted back into the filling position.

Figures 2 to 7 show that the pivot axis of each bag chair 7 is formed by the articulated coupling of attached to the upright spars 8 of the bag chair 7 arms 19 and attached to the stationary bars 16 of the rotor 2 tabs 20. The pivot axis is below the support shell 9 and in the central area below. The invention is not limited to the illustrated embodiments. It is essential that the drives for the bag chairs 7 are electromechanical drive units, which consist either of a respective geared motor 10 and one or two cranks 14 or of linear drives. If each drive unit has a gear motor, this consists of a drive motor 1 1, a gear 12 and an intermediate shaft 13, to which the crank 14 and the cranks 14 are mounted rotationally fixed. The connection with the upright spars 8 of the bag chair 7 is then via one or two coupling rods 15. If the electromechanical drive unit is a linear drive, which is designed as an electric cylinder or rod drive, the connection is made to the uprights 8 of the

Sack chair 7 via one or two actuating rods 18th

Claims

claims

1. Rotary filling machine (1) for filling valve bags (4), with a rotatably driven about a vertical axis rotor (2) with several Füllaggre- gates, each with a filling tube (3) and for supporting the valve bags

(4) are equipped with a blind chair (7), which are each pivotable about a horizontal axis (6) by means of a drive, characterized in that each drive comprises at least one controllable electromechanical drive unit (10, 11, 12, 13, 14, 17, 18) with at least one rotatable or with a linearly movable output member (14, 18) which is coupled to the bag chair (7).

2. Rotary filling machine according to claim I _5, characterized in that the electromotive drive unit with a housing having a geared motor (10) with a transverse to the motor shaft intermediate shaft

(13) is fitted, on which a crank (14) is rotatably mounted on at least one opposite the housing projecting end.

3. Rotary filling machine according to claim 2, characterized in that both end regions of the intermediate shaft (13) protrude relative to the housing of the geared motor (10), and that in each case a crank (14) is mounted rotationally fixed on both end regions.

4. Rotary filling machine according to one or more of the preceding claims, characterized in that the geared motor (10) consists of a

Drive motor (1 1) and a coupled therewith transmission (12), preferably a bevel gear.

5. Rotary filling machine according to one or more of the preceding arrival claims, characterized in that each crank (14) via a coupling rod (15) is pivotally connected to an upright rail (8) of the bag chair (7) articulated.

6. Rotary filling machine according to claim 5, characterized in that each coupling rod (15) is adjustable in its length.

7. Rotary filling machine according to one or more of the preceding Ansprechächen, characterized in that each geared motor (10) is controllable such that each crank (14) is clockwise driven and that each crank is fully rotatable or reversible drivable.

8. Rotary filling machine according to claim 1, characterized in that each drive unit consists of at least one electromechanical linear drive

(17) is formed.

9. Rotary filling machine according to claim 8, characterized in that the electromechanical linear drive is formed as a spindle drive with a rotationally driven spindle and a patch-mounted, secured against rotation adjusting nut.

10. Rotary filling machine according to claim 9, characterized in that each upright bar (8) of the bag chair (7) is associated with a spindle drive, and that each adjusting nut via an actuating rod (18) with the upright rail (8) is connected.

1 1. Rotating filling machine according to one or more of the preceding claims 8 to 10, characterized in that the two upright spars (8) of the bag chair (7) are interconnected via a cross-beam, and in that center of this cross-beam, the actuating rod (18) the electromotive linear drive is articulated.

12. Rotary filling machine according to one or more of the preceding arrival claims, characterized in that the horizontal axis of rotation (6) each

Sack chair (7) on the filling tube (3) facing away from the support shell (9) of the bag chair (7) is arranged, and that this horizontal axis of rotation (6) in the central region of the support shell.

13. Rotary filling machine according to one or more of the preceding claims, characterized in that the horizontal pivot axis (6) of the bag chair (7) by the articulated connection of two on the upright spars (8) of the bag chair (7) fixed arms and two at Rotor (2) of the rotating filling machine (1) fixed tabs (20) is formed.