The present invention pertains to a transfer process and to a transfer device for individually packaged products, especially for bottles
A transfer unit for bottle processing plants, which transfers the bottles being conveyed continuously by a conveyor onto stationary trays, is known from DE 201 08 401 U1. The robot synchronizes itself with the bottle conveyor and grips the row of bottles to be transferred during their conveying. Transfer of bottles from the running line onto trays is possible with this technique, but a reversed transfer operation is not possible. In addition, the transfer unit requires corresponding kinematics for synchronization and moving along piece by piece with the bottles.
It is an object of the present invention to show another transfer technique.
The present invention accomplishes this object with the features described in the principal process claim and in the principal device claim. The accumulating technique with the transfer process and with the accumulating device has the advantage that a transfer unit with simple kinematics can be used due to the fact that pulks of individually packaged products or bottles are formed and made ready in such a way that they are ready for transfer. In the simplest case, this may be a conventional portal robot with a cross member and with a gripping device that can be raised and lowered.
The accumulating device itself requires a smaller construction effort and can be arranged next to the line. The accumulating device is, moreover, flexible and can be adjusted to different sizes of product pulks and, moreover, adapted to the velocities at which the bottles are being conveyed in the line. The product pulks can be moved and driven in the accumulating device with independent kinematics and especially at a higher velocity compared to the accumulating conveyor.
The transfer device can be used more universally than prior-art device. It permits a reversed transfer kinematics, in which case individually packaged products, especially bottles, are brought back in a running line and introduced. Suitable gaps can be formed for this purpose in the running line with the accumulating device. In addition, the modes of operation and the kinematics between transfer from the running line and back into the running line can be switched over as desired in the transfer device. As an alternative, the transfer device can be arranged at a switchable bypass of the bottle conveying section.
The transfer device can cooperate with a stationary loading device, in which, e.g., the transfer onto trays takes place, which are made ready stationarily in a loading position. As an alternative, the transfer may take place onto a nonstationary or movable loading arrangement, e.g., onto trays being moved past or onto a line conveyor or the like. The transfer device can be used multifunctionally.
The accumulating device may have any desired and suitable design. With a plurality of holders that can be introduced into the line, the frontmost and optionally also the rearmost bottle are grasped in the bottle pulk, depending on the mode of operation, so that the bottle pulk can be formed over this, delimited against the running line, and it can be moved for independent conveying and positioning in the transfer position relative to the running line conveyor. The holders are designed for this as leaf-shaped or finger-shaped carriers, which can grip between the bottles in the line. A separating device arranged upstream of the accumulating device can ensure a mutual distance between the bottles in the line and better contact conditions. The holders are moved as reversing or circulating holders by means of a conveying device, and the conveying device may have any desired and suitable design. The circulating belt conveyor is an especially simple and easy-to-control embodiment. In particular, it is possible to work with a master axis.
The arrangement of a depositing device for temporarily receiving a row of individually packaged products to be transferred is advantageous for the reversed transfer kinematics with the introduction of individually packaged products, especially bottles, into a running line. This makes it possible to form and transfer complete rows or partial rows and to ensure optimal adaptation to the existing kinematic conditions on the line conveyor and to the gap sizes that can be attained. A conveyor at the depositing device has the advantage that the partial row to be transferred is always made ready at the same location, and this location is kinematically favorable for the gap formation in the running line and for the transfer kinematics. Additional travel axes at the row transfer unit can be done away with as a result if desired.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which preferred embodiments of the invention are illustrated.
In the drawings:
Referring to the drawings in particular,
The bottles (2) are conveyed continuously on a line conveyor (25) in a line (21) on an open or closed conveying path (5). As an alternative, a plurality of parallel line conveyors (25) with a plurality of lines (21) or one line conveyor (25) with a plurality of parallel lines (21) may be present. The line conveyor (25) or line conveyors (25) is/are designed, e.g., as a belt conveyor, on which the bottles (2) are being conveyed in the upright position and are secured during conveying with a suitable guide (26) against falling over laterally. As an alternative to belt conveyors, it is possible to use any other types of preferably continuously operating conveyors as desired, which convey bottles (2) in such a position in which they can be gripped. In the embodiment being shown, the line conveyor (25) extends through the transfer device (1) and can have a shunt at the end of the path for diverting the bottles (2) onto another conveyor.
The bottles (2) are conveyed in the bottle processing plant (4) in an, e.g., circular conveying path (5) with suitable conveying means and they can be deflected via diverters into other areas of the plant, e.g., to a filling means, a palletizing device or the like. Conversely, it is also possible to introduce bottles (2) into the conveying path (5). The line conveyor (25) may be part of this conveying path (5).
The bottles (2) are conveyed in the line (21), e.g., spaced closely to one another with mutual contact and in a row one behind the other in a constant, interruption-free conveying motion. The line conveyor (25) may have, at one or more locations, a separating device (23), which has a design similar to that, e.g., in DE 201 08 401 U1, and has a rotating driven screw arranged along the direction of conveying (18) with a pitch increasing in the direction of conveying to form axial spaces (24) between the bottles (2).
At least one transfer device (1), with which bottles (2) can be taken from the running line (21) in the form of rows of bottles (10) and transferred onto a tray (7) standing ready in a loading position (9), is present in the bottle processing plant (4). As an alternative, the transfer device (1) makes possible a reversed transfer operation, in which bottles (2) in complete rows of bottles (10) or in partial rows (41, 42) are transferred from a tray (7) into the running line (21) and introduced there.
As is illustrated in
The transfer device (1) has a row transfer unit (11) with a gripping device (12) for at least one row of bottles (10). When the row transfer device (11) handles an individual line (21), the gripping device (12) grips an individual row of bottles (10). If a plurality of parallel lines (21) are handled, the gripping device (12) can correspondingly grip a plurality of rows of bottles (10).
The row transfer unit (11) has a manipulator (15) for moving the gripping device (12). In the embodiment being shown, this is a portal robot (15) with one or more translatory axes, which has, e.g., a portal-like frame (16) with an elevated cross member (17) displaceable thereon at right angles to the direction of conveying (18), with the gripping device (12) arranged hanging thereon. The gripping device (12) may be of any suitable type and it grips the bottles (2) at a suitable point, especially on a collar (3) in the head area. The gripping device (12) may be divided according to
The transfer device (1) has, furthermore, an accumulating device (27), which is associated with the line conveyor (25) and which is used to temporarily form and delimit accumulated bottle pulks (28) and gaps (29) in the running line (21). In addition, the bottle pulk (28) formed can be conveyed with the accumulating device (27) along the line conveyor (25) at a velocity different from the velocity at which the line conveyor is running. The accumulating device (27) can grip, in particular, the bottle pulk (28) at the two ends, transport it independently as a pulk and drive it at varying velocities, which may be at times lower and at times higher than the line conveyor velocity. The bottles (2) in the bottle pulk (28) are moved in a dragging along manner over the line conveyor (25).
The accumulating device (27) is arranged, e.g., next to the line conveyor (25) and in the area of the row transfer unit (11). This has advantages for the reliable gripping and guiding of the bottles (2) in case of varying velocities of conveying. There also is more space for gripping over the height of the bottle, and, moreover, a plurality of gripping points offset in height are available. The accumulating device (27) may be arranged, as an alternative, at another location, e.g., under the line conveyor (25).
The accumulating device (27) extends in the direction of conveying (18) at least up to the rear end of the tray (7). The accumulating device (27) extends in the opposite direction beyond the row transfer unit (11) and thus has a greater length than the row of bottles (10) to be transferred. One of the separating devices (23) described above is arranged in front of the accumulating device (27) in the direction of conveying (18).
The accumulating device (27) has a plurality of holders (35, 36, 37, 38), which can be introduced into the line (21), grip between the bottles (2) in the running line, and are movable by means of a conveying device (30) in the direction of conveying (18) in a reversing or circulating pattern. The holders (35, 36, 37, 38) preferably grip into the spaces (26) between the bottles (2). The conveying device (30) can be driven at variable velocities and also stop.
The conveying device (30) and the holders (35, 36, 37, 38) may have any desired and suitable design. In the exemplary embodiment being shown, the conveying device (30) is designed as a laterally circulating belt conveyor with vertical deflection axes (39, 43), of which the deflection axis (43) located in the front in the direction of conveying (18) is a master axis, which is connected to the control (50) of the transfer device (1) in terms of signal technology and via the motions of which the subsequent functions are controlled.
In the exemplary embodiments shown in
A plurality of holders (35, 36, 37, 38) are arranged rigidly and optionally adjustably at the circulating belts or bent groups (31, 32). For example, two holders (35, 36) and (37, 38) each are arranged at a distance in the direction of circulation at their circulating belt (31, 32) which distance corresponds to the length of a bottle pulk (28) and of the row of bottles (10) formed therefrom. In the pulk and in the row of bottles (10), bottles (2) stand close to each other and preferably in mutual contact with one another one behind the other in the direction of conveying (18). The holders (35, 36) and (37, 38) are designed as narrow, finger- or leaf-shaped carriers, which project laterally from the circulating belt (31, 32) and which can grip between the bottles (2) in the running line (21) and especially into the distances (24) while running around the axis (43).
The carrying run (33) of the circulating belts or belt groups (31, 32) is arranged in parallel to and in the immediate vicinity of the running line (21). The loose side (34) is located at a laterally spaced location. After running around the axis (43) that is the front axis in the direction of conveying (18), the outwardly projecting holders (35, 36, 37, 38) enter the running path of the line (21) in a pivoting motion. When running around the rear axis (39), they will again become disengaged from the line (21). The thickness of the carriers is coordinated with the contour of the bottles (2) and the spaces (24) possibly formed. In the belt groups (31, 32) with two or more partial belts (44, 45, 46, 47) each, the carriers (35, 36, 37, 38) are divided into two or more carrier tabs (48, 49) each, which are arranged one on top of another in the axial direction. Due to the fact that the partial belts (44, 45, 46, 47) are arranged such that the groups cross over each other, the carrier tabs (48, 49) can overtake each other group by group and move relative to one another. In addition, two carriers or their four carrier tabs (48, 49) can grip together at one location between the bottles (2) in the line (21), as this is shown, e.g., at the left-hand axis (43) in
At its rear end of the row transfer unit, the accumulating device (27) has a transfer zone (40), which lies at the same level as and laterally next to the tray (7). In the transfer zone (40), the bottle pulk (28) intended for transfer can be positioned in a temporarily nonmoving manner for transfer to the row transfer unit (11). A gap (29) can likewise be formed in the running line (21) for inserting a row of bottles (10) or a partial row (41, 42).
As is illustrated in
The transfer functions will be explained below on the basis of
In the embodiment according to
As is illustrated in
At the same time, the first holder (37) of the second belt group (32) can grip into the area in front of the bottle (2) following next in the arriving line (21).
The bottle pulk (28) formed and delimited now between the holders (35, 36) can now be moved forward by an accelerated conveying motion of the belt group (31) in the direction of conveying (18), and the first holder (37) of the other belt group (32) running more slowly and begins to pile up the next bottle pulk (28). A gap (29) is formed between the two bottle pulks and the holders (36, 37) due to the different conveying velocities.
The first bottle pulk (28) formed is conveyed with the acceleration mentioned up into the transfer zone (40) and stopped here by a stop of the belt group (31), while the bottle conveyor (25) under the bottle pulk (28) continues to run. The bottle pulk (28) or the row of bottles (10) can be gripped in this temporarily nonmoving position by the row transfer unit (11) with the cross member (17) positioned above the transfer zone (40) and gripped by the lowered gripping device (12). The row of bottles (10) is lifted off from the bottle conveyor (25) by a relative stroke, e.g., an upward stroke, positioned by a displacement of the cross member (17) above the intended loading site on the tray (7) and lowered for releasing the bottle on the tray (7). The row transfer unit (11) then returns into the transfer zone (40) for picking up the next bottle pulk (28).
As an alternative, the relative stroke may be different. It may be, e.g., a side stroke, with which the row of bottles (10) is pushed off laterally from the bottle conveyor (25).
Due to the formation of the gaps (29) between the bottle pulks (28), there is enough time to grip and lift off, push off or move in another way the stopped bottle pulk (28). The length of the accumulating device (27) is selected to be such that the desired kinematic functions can be attained.
When the bottle pulk (28) is unloaded from the belt group (31), the first holder (35) is moved forward at such an increased velocity and synchronized with the rear holder (38) of the second belt group (32) such that the two will together engage the line (21) after running around the axis (43). The above-described cycle will then begin anew.
In an embodiment according to
Various variants of the embodiments shown and described are possible. The transport device (30) may be, instead of the circulating belts (31, 32), a linear or reversingly moving drive, e.g., a cylinder, which moves forward and backward in the direction of conveying (18). The holders may be designed in this case as holders pivotable in a controlled manner about the axis of the piston rod, and they grip into the line (21). Such a linear cylinder drive may be arranged on one side or on both sides of the line (21) and the conveying path thereof, and the same functions can be achieved in case of double-sided arrangement as in case of the two circulating belts or belt groups (31, 32). In another variant, any other desired embodiment of the transport device and of the holders is possible.
In the embodiment according to
In a variant of this, the trays can be stopped in the loading position (9) only briefly, e.g., when a tray (7) can be filled or emptied with one or more rows of bottles (10) in a transfer operation. Furthermore, it is possible to move the trays (7) during the transfer operation if the row transfer unit (11) has a corresponding additional axis for the joint temporary motion. In addition, it is possible to deposit the rows of bottles (10) during transfer directly on a conveyor rather than on a trough-like tray or another receiving device. Transfer of bottles between two line conveyors of identical or similar design can take place with the above-described technique with one or more lines, an accumulating device of the above-described type being assigned to both line conveyors.
The embodiment of the row transfer unit (11) and other components of the transfer device (1) can be varied as well. The manipulator (15) may be designed, in particular, as an articulated-arm robot.
While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.
Number | Date | Country | Kind |
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20 2005 019 907.9 | Dec 2005 | DE | national |
This application is a United States National Phase application of International Application PCT/EP2006/012088 and claims the benefit of priority under 35 U.S.C. § 119 of German patent application DE 20 2005 019 907.9 filed Dec. 19, 2005, the entire contents of which are incorporated herein by reference.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2006/012088 | 12/15/2006 | WO | 00 | 6/13/2008 |