CA2515437A1 - Elliptical synchronous belt drive - Google Patents
Elliptical synchronous belt drive Download PDFInfo
- Publication number
- CA2515437A1 CA2515437A1 CA002515437A CA2515437A CA2515437A1 CA 2515437 A1 CA2515437 A1 CA 2515437A1 CA 002515437 A CA002515437 A CA 002515437A CA 2515437 A CA2515437 A CA 2515437A CA 2515437 A1 CA2515437 A1 CA 2515437A1
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- CA
- Canada
- Prior art keywords
- drive
- transmission means
- closure
- closing
- drive output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/12—Subdividing filled tubes to form two or more packages by sealing or securing involving displacement of contents
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- A—HUMAN NECESSITIES
- A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
- A22C—PROCESSING MEAT, POULTRY, OR FISH
- A22C11/00—Sausage making ; Apparatus for handling or conveying sausage products during manufacture
- A22C11/12—Apparatus for tying sausage skins ; Clipping sausage skins
- A22C11/125—Apparatus for tying sausage skins ; Clipping sausage skins by clipping; Removal of clips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/04—Applying separate sealing or securing members, e.g. clips
- B65B51/043—Applying springy clips around bag necks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H2035/003—Gearings comprising pulleys or toothed members of non-circular shape, e.g. elliptical gears
Abstract
The invention relates to a device for closing a tubular or pouch-type packing wrapper filled with stuffing, especially sausage meat. Said device comprises means for tightening the packing wrapper and forming a top section free of stuffing, closing means for placing and closing at least one closing clip around the top section, and a drive for the tightening means and the closing means. Said drive comprises a gearbox (200, 300) that has a variable transmission ratio and transforms a uniform driving motion into a periodical, variable output motion, the transmission ratio of said gearbox being such that the output speed is slower during the positioning of the closing means than during the tightening and displacing processes.
Description
' ~ ' CA 02515437 2005-08-05 Munich 23rd April 2004 Our ref: PM 1295-03W0 MAC/mos Applicants/proprietors: POLY-CLIP SYSTEM GmbH & Co. KG
Office ref: New application Poly-clip System GmbH & Co. KG
Westerbachstr. 45, 60489 Frankfurt/Main Elliptical toothed belt drive The invention concerns an apparatus for closing a tube-like or bag-like packaging casing filled with filling material, in particular sausage meat, comprising means for constricting the packaging casing and forming a filling material-free plait end portion, closure means for fitting and closing at least one closure clip around the plait end portion and a drive for the constricting means and for the closure means.
If for example there is a wish for sausage meat, putty materials or sealing materials to be packaged in bags or film tubes (which are closed at one end), then that is effected in known manner by the tube-like or bag-like packaging casing being filled with filling material by a filling machine. At the end of the filling operation or shortly before same the filling machine outputs a synchronization pulse with which the closing operation by means of the apparatus described in the opening part of this specification is triggered. That begins with the filled packaging casing being constricted in a first working step by closure of the means for constricting the packaging casing, for example two pairs of displacement shears, in a radial direction with respect to the central axis of the i packaging casing, to form a short plait portion (displacement}. Then, in a second working step, the two pairs of displacement shears are moved away from each other in the axial direction, that is to say in the longitudinal direction of the packaging casing (spreading), whereby filling material disposed there is displaced so that a filling material-free plait end portion of the desired length is formed between the two pairs of displacement shears. Thereupon, in a third working step, a closure clip which is introduced into the path of a punch - this is part of the closure means - is fitted onto the packaging casing in the region of the plait end portion and deformed between the punch and a die - this is also part of the closure means - in such a way that it is applied around and closes the plait end portion. With an arrangement of two punches and dies the plait end portion can be closed by two closure clips arranged in mutually juxtaposed relationship in the axial direction and possibly severed in the same working operation between those two closure clips. After the closure operation in a fourth working step the constricting means and the closure means are moved back into their starting position and a new working cycle can begin with the filling operation.
The constricting means and the closure means are driven by a drive 2o for example comprising an electric motor and a transmission means connected on the output side thereof, in such a way that the movements thereof are coupled together by drive output shafts of the transmission means and associated cam disks. The control curves of the cam disks implement the movements of the constricting means and the closure means in the desired sequence in respect of time. Accordingly a revolution of the cam disks results in a working cycle.
DE 196 O1 720 A1 addresses the problem that opening of the displacement shears, particularly when dealing with sausages of relatively large diameter, does not last sufficiently long to introduce a sufficient amount of filling material into the packaging casing. It is therefore proposed that a non-constant drive speed is provided, for example by a freely controllable three-phase current servo drive as part of the drive arrangement in order to achieve an advantageous shears opening performance. Accordingly the operating procedures in respect of time are afforded by superimposition of the non-constant drive speed curve with the control curves of the cam disks. In accordance with that publication the rotary speed of the motor is controlled in such a way that the displacement shears remain open for a long time at a slow drive speed, which facilitates introduction of the 1=Illing material, and the other movement phases are accelerated so that the long open times of the displacement shears are compensated and the duration of a working cycle 1o does not need to be increased in length, even when dealing with sausages of large diameter.
It is further known from EP 0 935 421 B1 for the rigid coupling between the movements of the pairs of displacement shears and the clip levers to be abolished by virtue of the individual working cycles of the closure procedure, namely, displacement, spreading, fitting and closing the closure clips, being at least partially controlled independently of each other. In that way the sequence of movements involved can be adapted to the respective product. There is in particular the possibility that when dealing with glutinous-pasty filling material, the spreading operation is 2o caused to take place more slowly but the operations of fitting and closing the closure clips are caused to take place more quickly, and in that way the productivity when producing such sausages can be~ increased. In accordance with that solution, electric motors are actuated by a programmable control unit as part of the drive in such a way that the rotary speed is altered in dependence on the respectively desired working speed for each working step within a cycle.
Apparatuses with such a drive however consume a relatively large amount of energy, in particular due to the apparatus being periodically started up and slowed down.
Finally, DE 42 41 231 discloses a wrap transmission arrangement with a periodically variable transmission ratio, in particular a toothed belt transmission arrangement, which is used in those cases in which the ratio ,, of the angular speeds or the ratio of the torques of the drive input and the drive output shafts is to be of a variable value. For example the power requirement of a drive can be evened out by means of such a transmission arrangement if the driven machine has a high torque requirement only during a part of the revolution. Another situation of use involves being able to slow down the speed of a movement for a part of the revolution in order to be able to perform a working step more precisely.
The object of the invention is to provide a closure apparatus whose drive is better adapted to the desired process sequence and at the same time requires less energy.
In an apparatus of the kind set forth in the opening part of this specification that object is attained in that the drive has a non-uniformly transmitting transmission means which converts a uniform drive input movement into a periodic, non-uniform drive output movement, wherein the transmission ratio of the transmission means is such that the drive output speed when fitting the closure means is reduced with respect to the drive output speed in the constriction and displacement operations.
The invention entails the realization that the torque requirement is 2o very different within a working cycle. More specifically, in the working steps which require a lower working speed - that is to say a lower rotary speed of the drive output shaft of the transmission means {drive output speed) - the torque requirement at that drive output shaft is generally also increased. For example, when dealing with glutinous-pasty filling material, the displacement and spreading movements take place slowly, but at the same time the greatest (linear} force, that is to say the greatest drive output moment, is required. In a corresponding manner, in cases in which the operations of fitting and closing the clips take place more slowly, for example when dealing with filling material of low viscosity, that process is the one which requires most force and thus drive output moment. In addition the invention entails the realization that the torque requirement and the variation, which is inversely proportional thereto, in the required working speed recur periodically in each working cycle, that is to say after each revolution of the cam disk. The use of a non-uniform transmission ratio means that the drive input speed within a cycle changes periodically and in inverse proportion to the drive torque.
The delivery cycle of the drive with a periodically non-uniformly transmitting transmission means is therefore ideally adapted to the take-off cycle, that is to say the desired process sequence with periodically recurring working steps involving a non-uniform working speed or non-uniform torque requirement.
1o As the dimensioning of the drive motor must be designed in accordance with the torque requirement maximum, the apparatus according to the invention thus has the advantage that, unlike the situation in the state of the art, the torque requirement is already reduced at the drive input side in the region of the peaks, that is to say, during the slow movement phase. The motor power to be estimated can thus be reduced in comparison with the known drives with a controlled motor speed, whereby it is possible to save on cost and energy. A further advantage of the invention is that the variation in the working speed, at the transmission side, means that braking and acceleration processes which are required during a cycle on. the part of the drive motor can be avoided or at least reduced and therefore the demands on the dynamics of the motors and the power thereof and thus the power consumption can also be reduced for that reason.
Advantageous developments of the apparatus according to the invention are set forth in the appendant claims.
The invention is described in greater detail hereinafter by means of an embodiment by way of example with reference to the Figures in which:
Figure 1 shows individual working steps of a closure operation of an embodiment of the apparatus according to the invention in relation to the drive output speed, Figure 2 is a diagrammatic view of a first embodiment of a periodically non-uniformly transmitting transmission means, and Figure 3 is a diagrammatic view of a second embodiment of a periodically non-uniformly transmitting transmission means.
The upper curve 10 in Figure 1 shows a diagrammatic configuration by way of example of the drive output speed or rotary speed in dependence on the angle of rotation of the drive output shaft of the transmission means. The illustrated speed variation covers a full revolution of the drive output shaft and accordingly is periodically repeated. In this embodiment the variation in speed arises on the one hand out of the use according to the invention of a non-uniformly transmitting transmission means whose transmission effect on the other hand is superimposed with a drive speed which is regulated in accordance with a preselected control program.
If for example a toothed belt drive with an elliptical drive gear is used as the non-uniformly transmitting transmission means, then the variation in rotary speed of the drive output shaft fluctuates approximately sinusoidally. As in the illustrated configuration of the curve 10, that fluctuation can be stretched phase-wise and compressed phase-wise so that over a full revolution the result is an asymmetrical variation in the drive speed. Compression or stretching of the individual phases can be adapted for example to the duration of the filling operation or other demands. In addition the amplitude of the drive output speed can be compensated at points by an increase and/or reduction in the speed of rotation of the motor and also increased at another location. In that way it is possible to achieve even more precise adaptation of the delivery cycle of the drive to the take-off cycle, with the advantages of the apparatus according to the invention still being used (at least in phase-wise manner). For, although additional regulation of the drive speed can sometimes be required the use of a non-uniform transmission means provides that the regulating intervention does not have to be so severe and that an increased torque is available in operating steps involving a slow working speed.
Office ref: New application Poly-clip System GmbH & Co. KG
Westerbachstr. 45, 60489 Frankfurt/Main Elliptical toothed belt drive The invention concerns an apparatus for closing a tube-like or bag-like packaging casing filled with filling material, in particular sausage meat, comprising means for constricting the packaging casing and forming a filling material-free plait end portion, closure means for fitting and closing at least one closure clip around the plait end portion and a drive for the constricting means and for the closure means.
If for example there is a wish for sausage meat, putty materials or sealing materials to be packaged in bags or film tubes (which are closed at one end), then that is effected in known manner by the tube-like or bag-like packaging casing being filled with filling material by a filling machine. At the end of the filling operation or shortly before same the filling machine outputs a synchronization pulse with which the closing operation by means of the apparatus described in the opening part of this specification is triggered. That begins with the filled packaging casing being constricted in a first working step by closure of the means for constricting the packaging casing, for example two pairs of displacement shears, in a radial direction with respect to the central axis of the i packaging casing, to form a short plait portion (displacement}. Then, in a second working step, the two pairs of displacement shears are moved away from each other in the axial direction, that is to say in the longitudinal direction of the packaging casing (spreading), whereby filling material disposed there is displaced so that a filling material-free plait end portion of the desired length is formed between the two pairs of displacement shears. Thereupon, in a third working step, a closure clip which is introduced into the path of a punch - this is part of the closure means - is fitted onto the packaging casing in the region of the plait end portion and deformed between the punch and a die - this is also part of the closure means - in such a way that it is applied around and closes the plait end portion. With an arrangement of two punches and dies the plait end portion can be closed by two closure clips arranged in mutually juxtaposed relationship in the axial direction and possibly severed in the same working operation between those two closure clips. After the closure operation in a fourth working step the constricting means and the closure means are moved back into their starting position and a new working cycle can begin with the filling operation.
The constricting means and the closure means are driven by a drive 2o for example comprising an electric motor and a transmission means connected on the output side thereof, in such a way that the movements thereof are coupled together by drive output shafts of the transmission means and associated cam disks. The control curves of the cam disks implement the movements of the constricting means and the closure means in the desired sequence in respect of time. Accordingly a revolution of the cam disks results in a working cycle.
DE 196 O1 720 A1 addresses the problem that opening of the displacement shears, particularly when dealing with sausages of relatively large diameter, does not last sufficiently long to introduce a sufficient amount of filling material into the packaging casing. It is therefore proposed that a non-constant drive speed is provided, for example by a freely controllable three-phase current servo drive as part of the drive arrangement in order to achieve an advantageous shears opening performance. Accordingly the operating procedures in respect of time are afforded by superimposition of the non-constant drive speed curve with the control curves of the cam disks. In accordance with that publication the rotary speed of the motor is controlled in such a way that the displacement shears remain open for a long time at a slow drive speed, which facilitates introduction of the 1=Illing material, and the other movement phases are accelerated so that the long open times of the displacement shears are compensated and the duration of a working cycle 1o does not need to be increased in length, even when dealing with sausages of large diameter.
It is further known from EP 0 935 421 B1 for the rigid coupling between the movements of the pairs of displacement shears and the clip levers to be abolished by virtue of the individual working cycles of the closure procedure, namely, displacement, spreading, fitting and closing the closure clips, being at least partially controlled independently of each other. In that way the sequence of movements involved can be adapted to the respective product. There is in particular the possibility that when dealing with glutinous-pasty filling material, the spreading operation is 2o caused to take place more slowly but the operations of fitting and closing the closure clips are caused to take place more quickly, and in that way the productivity when producing such sausages can be~ increased. In accordance with that solution, electric motors are actuated by a programmable control unit as part of the drive in such a way that the rotary speed is altered in dependence on the respectively desired working speed for each working step within a cycle.
Apparatuses with such a drive however consume a relatively large amount of energy, in particular due to the apparatus being periodically started up and slowed down.
Finally, DE 42 41 231 discloses a wrap transmission arrangement with a periodically variable transmission ratio, in particular a toothed belt transmission arrangement, which is used in those cases in which the ratio ,, of the angular speeds or the ratio of the torques of the drive input and the drive output shafts is to be of a variable value. For example the power requirement of a drive can be evened out by means of such a transmission arrangement if the driven machine has a high torque requirement only during a part of the revolution. Another situation of use involves being able to slow down the speed of a movement for a part of the revolution in order to be able to perform a working step more precisely.
The object of the invention is to provide a closure apparatus whose drive is better adapted to the desired process sequence and at the same time requires less energy.
In an apparatus of the kind set forth in the opening part of this specification that object is attained in that the drive has a non-uniformly transmitting transmission means which converts a uniform drive input movement into a periodic, non-uniform drive output movement, wherein the transmission ratio of the transmission means is such that the drive output speed when fitting the closure means is reduced with respect to the drive output speed in the constriction and displacement operations.
The invention entails the realization that the torque requirement is 2o very different within a working cycle. More specifically, in the working steps which require a lower working speed - that is to say a lower rotary speed of the drive output shaft of the transmission means {drive output speed) - the torque requirement at that drive output shaft is generally also increased. For example, when dealing with glutinous-pasty filling material, the displacement and spreading movements take place slowly, but at the same time the greatest (linear} force, that is to say the greatest drive output moment, is required. In a corresponding manner, in cases in which the operations of fitting and closing the clips take place more slowly, for example when dealing with filling material of low viscosity, that process is the one which requires most force and thus drive output moment. In addition the invention entails the realization that the torque requirement and the variation, which is inversely proportional thereto, in the required working speed recur periodically in each working cycle, that is to say after each revolution of the cam disk. The use of a non-uniform transmission ratio means that the drive input speed within a cycle changes periodically and in inverse proportion to the drive torque.
The delivery cycle of the drive with a periodically non-uniformly transmitting transmission means is therefore ideally adapted to the take-off cycle, that is to say the desired process sequence with periodically recurring working steps involving a non-uniform working speed or non-uniform torque requirement.
1o As the dimensioning of the drive motor must be designed in accordance with the torque requirement maximum, the apparatus according to the invention thus has the advantage that, unlike the situation in the state of the art, the torque requirement is already reduced at the drive input side in the region of the peaks, that is to say, during the slow movement phase. The motor power to be estimated can thus be reduced in comparison with the known drives with a controlled motor speed, whereby it is possible to save on cost and energy. A further advantage of the invention is that the variation in the working speed, at the transmission side, means that braking and acceleration processes which are required during a cycle on. the part of the drive motor can be avoided or at least reduced and therefore the demands on the dynamics of the motors and the power thereof and thus the power consumption can also be reduced for that reason.
Advantageous developments of the apparatus according to the invention are set forth in the appendant claims.
The invention is described in greater detail hereinafter by means of an embodiment by way of example with reference to the Figures in which:
Figure 1 shows individual working steps of a closure operation of an embodiment of the apparatus according to the invention in relation to the drive output speed, Figure 2 is a diagrammatic view of a first embodiment of a periodically non-uniformly transmitting transmission means, and Figure 3 is a diagrammatic view of a second embodiment of a periodically non-uniformly transmitting transmission means.
The upper curve 10 in Figure 1 shows a diagrammatic configuration by way of example of the drive output speed or rotary speed in dependence on the angle of rotation of the drive output shaft of the transmission means. The illustrated speed variation covers a full revolution of the drive output shaft and accordingly is periodically repeated. In this embodiment the variation in speed arises on the one hand out of the use according to the invention of a non-uniformly transmitting transmission means whose transmission effect on the other hand is superimposed with a drive speed which is regulated in accordance with a preselected control program.
If for example a toothed belt drive with an elliptical drive gear is used as the non-uniformly transmitting transmission means, then the variation in rotary speed of the drive output shaft fluctuates approximately sinusoidally. As in the illustrated configuration of the curve 10, that fluctuation can be stretched phase-wise and compressed phase-wise so that over a full revolution the result is an asymmetrical variation in the drive speed. Compression or stretching of the individual phases can be adapted for example to the duration of the filling operation or other demands. In addition the amplitude of the drive output speed can be compensated at points by an increase and/or reduction in the speed of rotation of the motor and also increased at another location. In that way it is possible to achieve even more precise adaptation of the delivery cycle of the drive to the take-off cycle, with the advantages of the apparatus according to the invention still being used (at least in phase-wise manner). For, although additional regulation of the drive speed can sometimes be required the use of a non-uniform transmission means provides that the regulating intervention does not have to be so severe and that an increased torque is available in operating steps involving a slow working speed.
" . . CA 02515437 2005-08-05 The drive output speed is additionally superimposed with the control curves, shown under the curve 10, in respect of the cam disks, to afford a desired movement of the means for constricting the packaging casing and forming a filling material-free plait end portion as well as the closure means. Curve 12 shows a typical configuration in respect of the deflection of pairs of displacement shears as the means for constricting the casing. They move in a radial direction with respect to the axis of a sausage to be closed, for the purposes of displacing the filling material.
With a rotation of the drive output shaft through 45°, the displacement process begins and it ends after a further 80°. It is only thereafter that the spreading operation begins, curve 14. In that case, in the course of a revolution of the drive output shaft through a further 45°, the pairs of displacement shears are moved away from each other in the axial direction with respect to the sausage and thus the sausage meat is displaced from a region of the casing, which is to be closed, while constriction of the displacement shears is maintained. A radial movement of upper and lower clip levers begins approximately simultaneously with the spreading of the pairs of displacement shears, curves 16 and 18. In the illustrated embodiment, in that working step the lower clip lever pivots 2o with a die under the filling material-free plait end portion while at the same time the upper clip lever moves with a punch - the clip levers, the die and the punch are parts of the closure means - in the opposite direction from above towards the die. It is only after the spreading operation is already concluded and a filling material-free plait end portion is therefore formed between the pairs of displacement shears, that the lower clip lever with the die reaches the point of maximum approach to the central axis of the sausage casing. It is at that point that the closure or clipping operation begins, marking 20. While the lower clip lever still remains in the point of maximum approach, the upper clip lever with the punch continues to move towards the center. In that situation the closure clip is changed in shape until it forms a fixedly fitted closure around the plait end portion of the tubular casing. In that working step the transmission ratio of the toothed belt transmission means is selected to be short, as the local minimum in the curve IO shows. That provides a minimum drive output speed at the beginning of the clipping operation and at the same time the torque at the drive output shaft is increased during the clip shaping step or clipping operation.
After the conclusion of the clipping operation the upper and lower clip levers open and release the fitted closure clip. Almost at the same time the pairs of displacement shears open in a radial direction. In that case only a low level of torque is required at the drive output shaft.
Consequently, a long transmission ratio can be selected for that working step. Finally the pairs of displacement shears are retracted in the axial direction into their original position and a full working cycle is concluded.
The transmission ratios can be altered for example by suitable adaptation of the eccentricity of the gears and/or the length ratios between the major axes of the ellipse. The torque maximum or the speed minimum in respect of the curve 10 can also be brought into coincidence by a phase displacement with each desired working step, which permits the apparatus according to the invention to be used to close a packaging casing filled with widely differing filling material.
The periodically non-uniformly transmitting transmission means as shown in Figure 2 is a toothed belt transmission means 200 with a first elliptical gear 202 and a second elliptical gear 204. The, two gears 202, 204 are coupled by way of a toothed belt 208. The first gear 202 is of more pronounced elliptical shape than the second gear than the second gear and provides for the non-uniform transmission effect. The ellipse shape of the second gear serves essentially only for length compensation.
Another example of a periodically non-uniformly transmitting transmission means is shown in Figure 3. This involves a toothed belt transmission means 300 with three gears 302, 304 and 306 which are 3o coupled by way of toothed belt 308 and which are mounted eccentrically.
Two of those, 302 and 304, are round and serve for the drive input and drive output, while the third 306 is a compensating gear for length compensation.
The illustrated transmission means respectively convert a uniform drive input movement, that is to say a constant rotary drive speed, into a periodically non-uniform drive output movement. In the illustrated transmission means the drive input and drive output side are not fixed.
The periodicity can be doubled in the case of symmetrical arrangements like that of Figure 2.
Instead of the toothed belt transmission means 200, 300 it is also possible in each case to use a chain transmission means involving the same arrangement. Other arrangements can also be envisaged: for example a different transmission performance can also be achieved by an elliptical and at the same time eccentrically mounted gear in combination with a plurality of gears which are mounted in phase-displaced eccentric relationship. Instead of a toothed belt transmission means or a chain transmission means, it is also possible to use a non-uniformly transmitting gear transmission.
Finally, it is also possible for a plurality of the specified forms of transmission means to be combined by being connected in succession.
With a rotation of the drive output shaft through 45°, the displacement process begins and it ends after a further 80°. It is only thereafter that the spreading operation begins, curve 14. In that case, in the course of a revolution of the drive output shaft through a further 45°, the pairs of displacement shears are moved away from each other in the axial direction with respect to the sausage and thus the sausage meat is displaced from a region of the casing, which is to be closed, while constriction of the displacement shears is maintained. A radial movement of upper and lower clip levers begins approximately simultaneously with the spreading of the pairs of displacement shears, curves 16 and 18. In the illustrated embodiment, in that working step the lower clip lever pivots 2o with a die under the filling material-free plait end portion while at the same time the upper clip lever moves with a punch - the clip levers, the die and the punch are parts of the closure means - in the opposite direction from above towards the die. It is only after the spreading operation is already concluded and a filling material-free plait end portion is therefore formed between the pairs of displacement shears, that the lower clip lever with the die reaches the point of maximum approach to the central axis of the sausage casing. It is at that point that the closure or clipping operation begins, marking 20. While the lower clip lever still remains in the point of maximum approach, the upper clip lever with the punch continues to move towards the center. In that situation the closure clip is changed in shape until it forms a fixedly fitted closure around the plait end portion of the tubular casing. In that working step the transmission ratio of the toothed belt transmission means is selected to be short, as the local minimum in the curve IO shows. That provides a minimum drive output speed at the beginning of the clipping operation and at the same time the torque at the drive output shaft is increased during the clip shaping step or clipping operation.
After the conclusion of the clipping operation the upper and lower clip levers open and release the fitted closure clip. Almost at the same time the pairs of displacement shears open in a radial direction. In that case only a low level of torque is required at the drive output shaft.
Consequently, a long transmission ratio can be selected for that working step. Finally the pairs of displacement shears are retracted in the axial direction into their original position and a full working cycle is concluded.
The transmission ratios can be altered for example by suitable adaptation of the eccentricity of the gears and/or the length ratios between the major axes of the ellipse. The torque maximum or the speed minimum in respect of the curve 10 can also be brought into coincidence by a phase displacement with each desired working step, which permits the apparatus according to the invention to be used to close a packaging casing filled with widely differing filling material.
The periodically non-uniformly transmitting transmission means as shown in Figure 2 is a toothed belt transmission means 200 with a first elliptical gear 202 and a second elliptical gear 204. The, two gears 202, 204 are coupled by way of a toothed belt 208. The first gear 202 is of more pronounced elliptical shape than the second gear than the second gear and provides for the non-uniform transmission effect. The ellipse shape of the second gear serves essentially only for length compensation.
Another example of a periodically non-uniformly transmitting transmission means is shown in Figure 3. This involves a toothed belt transmission means 300 with three gears 302, 304 and 306 which are 3o coupled by way of toothed belt 308 and which are mounted eccentrically.
Two of those, 302 and 304, are round and serve for the drive input and drive output, while the third 306 is a compensating gear for length compensation.
The illustrated transmission means respectively convert a uniform drive input movement, that is to say a constant rotary drive speed, into a periodically non-uniform drive output movement. In the illustrated transmission means the drive input and drive output side are not fixed.
The periodicity can be doubled in the case of symmetrical arrangements like that of Figure 2.
Instead of the toothed belt transmission means 200, 300 it is also possible in each case to use a chain transmission means involving the same arrangement. Other arrangements can also be envisaged: for example a different transmission performance can also be achieved by an elliptical and at the same time eccentrically mounted gear in combination with a plurality of gears which are mounted in phase-displaced eccentric relationship. Instead of a toothed belt transmission means or a chain transmission means, it is also possible to use a non-uniformly transmitting gear transmission.
Finally, it is also possible for a plurality of the specified forms of transmission means to be combined by being connected in succession.
Claims (5)
1. An apparatus for closing a tube-like or bag-like packaging casing filled with filling material, in particular sausage meat, comprising means for constricting the packaging casing and forming a filling material-free plait end portion, closure means for fitting and closing at least one closure clip around the plait end portion and a drive for the constricting means and for the closure means, characterized in that the drive has a non-uniformly transmitting transmission means which converts a uniform drive input movement into a periodic, non-uniform drive output movement, wherein the transmission ratio of the transmission means is such that the drive output speed when fitting the closure means is reduced with respect to the drive output speed in the constriction and displacement operations.
2. An apparatus for closing a tube-like or bag-like packaging casing filled with filling material, in particular sausage meat, comprising means for constricting the packaging casing and forming a filling material-free plait end portion, closure means for fitting and closing at least one closure clip around the plait end portion and a drive for the constricting means and for the closure means, characterized in that the drive has a non-uniformly transmitting transmission means which converts a uniform drive input movement into a periodic, non-uniform drive output movement, wherein the transmission ratio of the transmission means is such that the drive output speed in the constriction and displacement operations is reduced with respect to the drive output speed when fitting the closure means.
3. Apparatus as set forth in claim 1 or claim 2 characterized in that the transmission means is a toothed belt transmission means or a chain transmission means having at least one elliptical gear.
4. Apparatus as set forth in claim 1 or claim 2 characterized in that the transmission means is a toothed belt transmission means or a chain transmission means having at least one gear which is mounted eccentrically.
5. Apparatus as set forth in one of claims 1 through 4 characterized in that the drive speed is regulatable.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10318377.9 | 2003-04-23 | ||
| DE10318377 | 2003-04-23 | ||
| DE20319755U DE20319755U1 (en) | 2003-04-23 | 2003-12-19 | Machine for stuffing, tying-off and sealing sausage skins has drive for units used in tying off and fitting clips which operates at lower speed during clip fitting than tying off |
| DE20319755.0 | 2003-12-19 | ||
| PCT/EP2004/004329 WO2004093553A1 (en) | 2003-04-23 | 2004-04-23 | Elliptical synchronous belt drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2515437A1 true CA2515437A1 (en) | 2004-11-04 |
Family
ID=33311751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002515437A Abandoned CA2515437A1 (en) | 2003-04-23 | 2004-04-23 | Elliptical synchronous belt drive |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1617726B1 (en) |
| AT (1) | ATE354959T1 (en) |
| BR (1) | BRPI0409508A (en) |
| CA (1) | CA2515437A1 (en) |
| DE (1) | DE502004003049D1 (en) |
| ES (1) | ES2282861T3 (en) |
| RU (1) | RU2314699C2 (en) |
| WO (1) | WO2004093553A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1586210C3 (en) * | 1967-08-11 | 1976-09-02 | Niedecker Herbert | Device for dividing packages from a filled tube |
| DE2730603C3 (en) * | 1977-07-07 | 1981-10-01 | Niedecker, Herbert, Dipl.-Ing., 6240 Königstein | Process for filling and closing packages |
| DE4241231C2 (en) | 1992-12-08 | 1994-11-17 | Wilfried Rahe | Belt transmission with periodically variable transmission |
| CH690411A5 (en) * | 1995-02-03 | 2000-09-15 | Waelchli Hans | A method of operating a closure device for packaging wrappers. |
| DE19644074C2 (en) * | 1996-10-31 | 2001-02-22 | Poly Clip System Gmbh & Co Kg | Method and closing device for manufacturing sausage-starting products |
-
2004
- 2004-04-23 AT AT04729100T patent/ATE354959T1/en not_active IP Right Cessation
- 2004-04-23 WO PCT/EP2004/004329 patent/WO2004093553A1/en active IP Right Grant
- 2004-04-23 DE DE502004003049T patent/DE502004003049D1/en not_active Expired - Lifetime
- 2004-04-23 RU RU2005136353/13A patent/RU2314699C2/en not_active IP Right Cessation
- 2004-04-23 CA CA002515437A patent/CA2515437A1/en not_active Abandoned
- 2004-04-23 ES ES04729100T patent/ES2282861T3/en not_active Expired - Lifetime
- 2004-04-23 EP EP04729100A patent/EP1617726B1/en not_active Expired - Lifetime
- 2004-04-23 BR BRPI0409508-1A patent/BRPI0409508A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0409508A (en) | 2006-04-18 |
| EP1617726B1 (en) | 2007-02-28 |
| ATE354959T1 (en) | 2006-03-15 |
| EP1617726A1 (en) | 2006-01-25 |
| RU2005136353A (en) | 2006-03-20 |
| RU2314699C2 (en) | 2008-01-20 |
| DE502004003049D1 (en) | 2007-04-12 |
| WO2004093553A1 (en) | 2004-11-04 |
| ES2282861T3 (en) | 2007-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |