EP3009538B1 - Bale opener - Google Patents

Bale opener Download PDF

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Publication number
EP3009538B1
EP3009538B1 EP15002767.0A EP15002767A EP3009538B1 EP 3009538 B1 EP3009538 B1 EP 3009538B1 EP 15002767 A EP15002767 A EP 15002767A EP 3009538 B1 EP3009538 B1 EP 3009538B1
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EP
European Patent Office
Prior art keywords
take
lifting spindle
tower
arm
bale opener
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.)
Not-in-force
Application number
EP15002767.0A
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German (de)
French (fr)
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EP3009538A1 (en
Inventor
Alexander Schmid
Gerhard Gschliesser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP3009538A1 publication Critical patent/EP3009538A1/en
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Publication of EP3009538B1 publication Critical patent/EP3009538B1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G7/00—Breaking or opening fibre bales
    • D01G7/06—Details of apparatus or machines
    • D01G7/12—Framework; Casings; Coverings; Grids
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G7/00—Breaking or opening fibre bales
    • D01G7/06—Details of apparatus or machines
    • D01G7/14—Driving arrangements

Definitions

  • the invention relates to a bale opener for removing fiber flakes from fiber bales with a mounted on a chassis or bogie removal tower and with a Abtragarm.
  • Bale removing machines or bale openers are used to remove fibers or fiber flakes from pressed fiber bales.
  • a removal organ is moved across the fiber bales.
  • the removal member is attached to a Abtragarm, which is adjusted in height to the present fiber bales.
  • the Abtragarm in turn is held on a Abtragturm.
  • the ablation tower allows the ablation element to be moved over the ablated surface of the fiber bales.
  • the removal tower is arranged on a chassis or a bogie. With a chassis, which is usually performed on rails, can be driven along a row of bales. If the fiber bales are arranged in a circle around the removal tower, the removal tower is arranged on a bogie.
  • a combination of landing gear and bogie is when fibers or fibrils are removed in one direction from a first row of fiber bales and in the opposite direction from a second row of fiber bales.
  • the bale opener is at the beginning of processing lines in a spinning preparation (processing) for the processing of fiber material, such as cotton or synthetic fibers or mixtures thereof, and has a decisive influence on the continuity of the processes within the spinning preparation.
  • the fiber material delivered in bales is removed from the bales by removing fiber flakes and transferred to a pneumatic transport system.
  • the pneumatic transport system brings the fiber flakes through pipes to the following cleaning machines.
  • the Abtragarm is kept adjustable in today's usual bale openers on Abtragturm.
  • the height adjustment is usually done via chain or belt drives, where the Abtragarm is raised or lowered.
  • To determine the position the Abtragarms relative to the surface of the fiber bales are provided on Abtragarm sensors.
  • the CH 686 188 A5 a Abtragarm with a chain drive for height adjustment.
  • the Abtragarm is suspended via a rope and pulleys on a counterweight being adjusted with a lifting motor via a chain drive the Abtragarm in its height.
  • CH 657 386 A discloses a bale opener, which moves the Abtragarm circular over the fiber bales to be opened.
  • the Abtragarm is moved in height over four arranged at the corners threaded rods.
  • the threaded rods are connected via a gear to ensure a synchronous movement of the threaded rods.
  • the JP S63 102772 U a bale opener, in which the Abtragarm rotates about a stationary tower.
  • the height adjustment of the Abtragarmes is made via the rotation of an anchored in the Abtragturm lifting spindle.
  • the SU 32 342 A1 discloses a bale opener which has a held on a central, rigidly anchored lifting spindle Abtragorgan.
  • a disadvantage of the disclosed construction according to the prior art is the complex construction of the hoists, which either make a suspension independent of the actual movement necessary, or must have several simultaneously the Abtragarm moving linear actuators. This also has the consequence that an exact alignment of the Abtragarms is complicated with respect to the fiber bales to be opened and periodically re-adjustment must be performed due to operational wear. Likewise, an elaborate sensor system is necessary for the positioning and control of the hoist.
  • the object of the invention is to provide a bale opener with a Abtragarm, which allows easy controllable height adjustment of the Abtragarms and the Avoids the need for separate suspension or synchronous movement in different drive points.
  • the bale opener for removing fiber flakes from fiber bales comprises an ablation tower arranged on a chassis or bogie and a removal arm, the removal arm being held vertically adjustable in a guide on the ablation tower.
  • a single lifting spindle is provided with a longitudinal axis in the direction of movement of the Abtragarms, wherein the lifting spindle is attached to the Abtragturm and the Abtragarm is connected via a nut with the lifting spindle.
  • a single lifting spindle for example, a threaded spindle is provided.
  • the lifting spindle is fixedly secured to the removal tower, wherein the attachment is designed such that the lifting spindle extends with its longitudinal axis in the vertical direction of movement of the Abtragarmes.
  • the Abtragarm is connected via a nut with the lifting spindle. By rotating the nut with a fixed lifting spindle, the removal tower is moved downwards or upwards depending on the direction of rotation along the longitudinal axis.
  • the Abtragarm is connected via a recirculating ball nut with the lifting spindle.
  • balls that move axially as they move rotate in the grooves.
  • a return channel in the recirculating ball nut moves the balls back to close the circuit in which the balls circulate.
  • Ball screws have the advantage over screw drives that a lower drive power is required by a point contact of the balls and their rolling motion and results in a more precise positioning.
  • the ball screw can be adjusted almost free of play and therefore allows an exact execution of smallest movements of the Abtragarmes in the direction of the longitudinal axis of the lifting spindle.
  • the leadership of the Abtragarms in Abtragturm is designed such that the lifting spindle is loaded only with forces in its longitudinal axis.
  • the Abtragarm is held in guide rails on Abtragturm.
  • the guide rails are designed such that all transverse forces and tilting moments of the projecting Abtragarms are received by the guide.
  • the design of the guide rails is designed such that only a movement in the longitudinal axis of the lifting spindle is possible for the Abtragarm and the forces are absorbed in two linear and three axes of rotation through the guide.
  • the guide rails can be designed as simple longitudinal profiles. In this case, sliding elements or rollers are applied to the guide rails from three sides, wherein the sliding elements or rollers are mounted on the Abtragarm.
  • the lifting spindle can be arranged on the side of the Abtragarm, resulting in advantages for the positioning of a fiber transport channel within the Abtragarms and the Abtragturmes.
  • the lifting spindle is arranged outside the center of gravity axes of the Abtragarms. In such an arrangement, the Abtragarm tilts in a predetermined direction, resulting in a defined position in the guide. Because a tilting moment acts on the guide in a direction determined by the arrangement of the lifting spindle, it is possible to achieve a backlash-free adjustment of the guide.
  • two spaced U-shaped guide rails can be arranged with their longitudinal axis in the direction of movement of the ablation tower on the ablation tower.
  • the openings of the U-shaped guide rails point in the direction of the respective opposite guide rail.
  • the Abtragarm guide elements such as rollers or sliding elements, attached, which are applied to the guide rails of the Abtragturmes.
  • the guide elements are designed such that a tilting of the Abtragarmes is prevented around the two horizontal axes of the Abtragarmes.
  • the guide elements cause a lateral guidance of the Abtragarmes in its vertical direction of movement.
  • On Abtragarm rollers or sliding elements are mounted, which are so created on the guide rails of the guide in the ablation tower that a play-free guidance of the Abtragarms is given.
  • the attachment of the lifting spindle is provided on the ablation tower only at an upper end of the lifting spindle and the lifting spindle is not held in the ablation tower at a lower end.
  • This type of fastening of the lifting spindle which equates to hanging, results in optimum conditions for the operation of the ball screw drive.
  • a clamping of the lifting spindle by an upper and lower mounting can lead to lateral forces on the ball nut due to temperature differences or stresses occurring within the lifting spindle.
  • the lifting spindle is rotatably held in the ablation tower and provided the ball nut with a drive.
  • the ball nut which creates a connection between the Abtragarm and the lifting spindle is rotated by a drive in rotation and causes a movement of the Abtragarms in the direction of the longitudinal axis of the lifting spindle.
  • a drive is particularly advantageous.
  • Such a drive has the advantage that a certain number of revolutions or parts of revolutions can be performed.
  • the lifting spindle is surrounded on both sides of the ball nut by a protective cover, for example a bellows, which adapts in its longitudinal extension of the respective position of the ball nut on the spindle.
  • the position of the Abtragarms in its height is given by a first calibration by the drive and also adjustable.
  • Elaborate sensors, such as light barriers or path measurements, to adjust the height of the Abtragarms are no longer necessary. It is also not necessary to approach reference points. Synchronous servomotors also have the property that the highest possible torque is already available during start-up and thus a movement of the Abtragarmes is made possible even in the smallest areas.
  • the attachment of the lifting spindle in the ablation tower via a load cell.
  • the lifting spindle is suspended on a load cell, which is attached to the removal tower. Since the lifting spindle in turn depends on the recirculating ball nut of the removal tower, the weight of the Abtragarms and the lifting spindle, which are attached to the load cell can be determined via the load cell.
  • the pitch is measured as the path length which the ball nut travels during one revolution of the lifting spindle. It has been found that lifting spindles with a diameter of 20 mm to 75 mm are suitable for continuous operation, preferably, the diameter of the lifting spindle between 30 mm and 50 mm to choose. When using a recirculating ball nut, the pitch of the lifting spindle is advantageously 5 mm to 40 mm, particularly preferably 10 mm to 20 mm. When using a threaded nut multi-speed lifting spindles are beneficial.
  • the guide comprises at least one combination roller.
  • a combination roller replaces two arranged in mutually orthogonal axes axes rollers and thus has the advantage of realizing a space-saving arrangement of the necessary guide rollers.
  • the combination roller is composed of a transverse guide roller and a longitudinal guide roller, which have a common bearing pin for rotationally fixed support of the combination roller.
  • the cross guide roller rotates about the axis which also determines the position of the journal. This results from the arrangement of the transverse guide roller a guide transversely to the axis of the journal.
  • the longitudinal guide roller rotates in an axis which is arranged transversely (orthogonal) to the axis of the journal and causes by its surface a guide in the direction of the axis of the journal.
  • axis which is arranged transversely (orthogonal) to the axis of the journal and causes by its surface a guide in the direction of the axis of the journal.
  • four combination rollers are used.
  • the combination rollers are mounted in a rectangular arrangement on the Abtragarm or the Abtragturm.
  • bale openers with one or more removal rollers are known from the prior art.
  • the inventive embodiment of the bale opener is independent of whether one or more removal rollers are used.
  • FIG. 1 and FIG. 2 show in a schematic representation of a bale opener 1 for removing fiber flakes of fiber bales.
  • FIG. 1 shows the bale opener 1 in a plan view and FIG. 2 in a view.
  • the bale opener 1 consists essentially of an ablation tower 3 and a Abtragarm 5.
  • the Abtragarm 5 is attached to the Abtragturm 3 on one side and freely cantilevered over the fiber bale 2.
  • the Abtragturm 3 is equipped with a chassis 4. With the help of the chassis 4, the ablation tower 3 is moved on rails along the fiber bale 2. As a result of this movement 13, the removal arm 5 attached to the removal tower 3 is guided over the surface of the fiber bales 2.
  • Abtragarm 1 a Abtragorgan, usually one or more Abtragwalzen 15 is arranged.
  • the removal roller 15 takes from the fiber bale 2 fiber flakes 16.
  • the fiber flakes 16 are brought by the Abtragarm 5 and the Abtragturm 3 and to a pneumatic fiber flake transport system 17.
  • the fiber flake transport system 17 and thus also the transport path from the removal roller 15 to the fiber flake transport system 17 are under a certain negative pressure, which is used for pneumatic conveying of the fiber flakes from the discharge roller 15 by the fiber fluff transport system 17.
  • the attachment of Abtragarms 5 on Abtragturm 3 is made adjustable in height, so that the fiber bales 2 can be removed continuously.
  • the movement 14 of the ablation tower 5 serves to ensure a uniform removal of the fiber flakes 16 from the surface of the fiber bales 2.
  • FIG. 3 shows a schematic view of the Abtragarms 5 in a sectional view AA after FIG. 2 ,
  • the Abtragarm 5 is shown schematically and only partially and without the removal roller. It is the lifting mechanism for movement 14 of the Abtragarms 5 in one exemplary embodiment shown.
  • Attached to Abtragarm 5 is a ball nut 9.
  • the ball nut 9 encloses a lifting spindle 6.
  • the ball nut 9 is rotatably held with its housing on the Abtragarm 5.
  • the ball nut 9 is rotated by a drive (not shown), whereby it runs along with the Abtragarm 5 of the lifting spindle 6 along.
  • the lifting spindle 6 is held against rotation with its upper end with a fastening 18 on the ablation tower 3.
  • the lifting spindle 6 is suspended in the attachment 18, so that no lower securing the lifting spindle 6 is necessary. Above and below the ball nut 9, the lifting spindle 6 is enclosed by a respective bellows 19.
  • the bellows 19 adapts automatically to the respective length of the section of the lifting spindle 6 and avoids that contamination of the threaded grooves of the lifting spindle 6 can cause a malfunction of the ball screw.
  • the guide is composed of two opposing U-shaped guide rails 8 and provided on the Abtragarm 5 transverse rollers 20 and longitudinal rollers 21.
  • the transverse rollers 20 and the longitudinal rollers 21 are on each side the guide 7 arranged in pairs and engage in the guide rail 8.
  • the transverse rollers 20 touch the U-shaped guide rail 8 in its rear, attached to the discharge tower 3, flange.
  • the transverse rollers 20 of the Abtragarm is guided in the transverse direction.
  • the transverse rollers 20 prevent rotation of the Abtragarms 5 about its longitudinal axis 22.
  • the longitudinal rollers 21 are offset from each other and touch the U-shaped guide rails 8 in the protruding from the rear flange webs.
  • the longitudinal rollers 21 serve to position the Abtragarm 5 in the longitudinal axis 22 of the Abtragarms 5 and thereby keep in the horizontal while preventing rotation of the Abtragarmes about the longitudinal axis 8 of the lifting spindle 6.
  • the direction of rotation indicated by arrows in the longitudinal rollers 21 and the transverse rollers 20 results in a movement 14 of the Abtragarms 5 upwards.
  • a transverse roller 20 and a longitudinal roller 21 can each be combined to form a combined roller with a common journal.
  • FIG. 4 shows a schematic plan view of the Abtragarms 5 after FIG. 2 ,
  • the Abtragarm 5 is cantilevered on Abtragturm 3 held on the guide 7.
  • the guide 7 is by two opposing U-shaped guide rails 8, which are fixed to the ablation tower 3, and arranged in pairs transverse rollers 20 and longitudinal rollers 21, which are held on the Abtragarm 5 executed.
  • In the illustration after FIG. 4 only two opposing transverse and longitudinal roller pairs 20, 21 are shown. However, there are also arranged on both sides two superimposed transverse and longitudinal roller pairs 20, 21 (see FIG. 3 ).
  • the lifting spindle 6 which is encompassed by the ball nut 9. It is also an arrangement of the lifting spindle 6 outside the Abtragarms 5 conceivable because the lifting spindle only has to bear forces in its longitudinal axis and therefore the arrangement plays a minor role.
  • the ball nut 9 is connected to a drive 10 mounted in the Abtragarm.
  • the ball nut 9 is set in rotation, which depending on the direction of rotation to a lifting respectively lowering the Abtragarms 5 leads.
  • the transverse rollers 20 and the longitudinal rollers 21 are thereby moved in the guide rails 8 about their axes and hold the Abtragarm 5 on the predetermined by the guide rails 8 path.
  • the transverse and longitudinal rollers 20, 21 and sliding elements can be used with appropriate dimensions.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Description

Die Erfindung betrifft einen Ballenöffner zum Abtragen von Faserflocken von Faserballen mit einem auf einem Fahrwerk oder Drehgestell angeordneten Abtragturm und mit einem Abtragarm.The invention relates to a bale opener for removing fiber flakes from fiber bales with a mounted on a chassis or bogie removal tower and with a Abtragarm.

Ballenabtragmaschinen oder Ballenöffner werden eingesetzt um Fasern oder Faserflocken aus gepressten Faserballen heraus zu lösen. Dazu wird ein Abtragorgan über die Faserballen hinweg bewegt. Das Abtragorgan ist an einem Abtragarm befestigt, welcher in seiner Höhe auf die vorliegenden Faserballen eingestellt wird. Der Abtragarm wiederum ist an einem Abtragturm gehalten. Der Abtragturm ermöglicht, dass das Abtragorgan über die abzutragende Oberfläche der Faserballen hinwegbewegt werden kann. Dazu ist der Abtragturm auf einem Fahrwerk oder einem Drehgestell angeordnet. Mit einem Fahrwerk, das meist auf Schienen geführt ist, kann einer Ballenreihe entlang gefahren werden. Sind die Faserballen kreisförmig um den Abtragturm herum angeordnet, ist der Abtragturm auf einem Drehgestell angeordnet. Eine Kombination von Fahrwerk und Drehgestell liegt vor, wenn in der einen Richtung von einer ersten Reihe von Faserballen und in der entgegengesetzten Richtung von einer zweiten Reihe von Faserballen Fasern oder Faserflocken abgetragen werden.Bale removing machines or bale openers are used to remove fibers or fiber flakes from pressed fiber bales. For this purpose, a removal organ is moved across the fiber bales. The removal member is attached to a Abtragarm, which is adjusted in height to the present fiber bales. The Abtragarm in turn is held on a Abtragturm. The ablation tower allows the ablation element to be moved over the ablated surface of the fiber bales. For this purpose, the removal tower is arranged on a chassis or a bogie. With a chassis, which is usually performed on rails, can be driven along a row of bales. If the fiber bales are arranged in a circle around the removal tower, the removal tower is arranged on a bogie. A combination of landing gear and bogie is when fibers or fibrils are removed in one direction from a first row of fiber bales and in the opposite direction from a second row of fiber bales.

Der Ballenöffner steht am Anfang von Verfahrenslinien in einer Spinnereivorbereitung (Putzerei) zur Verarbeitung von Fasergut, beispielsweise Baumwolle oder synthetische Fasern oder deren Mischungen, und hat einen entscheidenden Einfluss auf die Kontinuität der Abläufe innerhalb der Spinnereivorbereitung. Im Ballenöffner wird das in Ballen angelieferte Fasergut durch ein Abtragen von Faserflocken von den Ballen gelöst und in ein pneumatisches Transportsystem übergeben. Das pneumatische Transportsystem bringt die Faserflocken durch Rohrleitungen zu den nachfolgenden Reinigungsmaschinen.The bale opener is at the beginning of processing lines in a spinning preparation (processing) for the processing of fiber material, such as cotton or synthetic fibers or mixtures thereof, and has a decisive influence on the continuity of the processes within the spinning preparation. In the bale opener, the fiber material delivered in bales is removed from the bales by removing fiber flakes and transferred to a pneumatic transport system. The pneumatic transport system brings the fiber flakes through pipes to the following cleaning machines.

Der Abtragarm ist in heute üblichen Ballenöffnern höhenverstellbar am Abtragturm gehalten. Die Höhenverstellung erfolgt dabei meist über Ketten- oder Riementriebe, an denen der Abtragarm hochgezogen oder abgesenkt wird. Zur Bestimmung der Position des Abtragarms relativ zu der Oberfläche der Faserballen sind am Abtragarm Sensoren vorgesehen.The Abtragarm is kept adjustable in today's usual bale openers on Abtragturm. The height adjustment is usually done via chain or belt drives, where the Abtragarm is raised or lowered. To determine the position the Abtragarms relative to the surface of the fiber bales are provided on Abtragarm sensors.

Aus dem Stand der Technik sind verschiedene Ausführungen von Hubwerken für Abtragarme bekannt. Beispielsweise offenbart die CH 686 188 A5 einen Abtragarm mit einem Kettentrieb zur Höhenverstellung. Der Abtragarm ist über ein Seil und Umlenkrollen an einem Gegengewicht aufgehängt wobei mit einem Hubmotor über einen Kettentrieb der Abtragarm in seiner Höhe verstellt wird.Various designs of hoists for removal arms are known from the prior art. For example, the CH 686 188 A5 a Abtragarm with a chain drive for height adjustment. The Abtragarm is suspended via a rope and pulleys on a counterweight being adjusted with a lifting motor via a chain drive the Abtragarm in its height.

In der CH 657 386 A wird ein Ballenöffner offenbart, welcher den Abtragarm kreisförmig über die zu öffnenden Faserballen bewegt. Dabei wird der Abtragarm in der Höhe über vier an den Ecken angeordnete Gewindestangen bewegt. Durch gleichzeitiges Drehen der Gewindestangen wird der Abtragarm angehoben oder abgesenkt. Dabei sind die Gewindestangen über ein Getriebe verbunden um eine synchrone Bewegung der Gewindestangen zu gewährleisten.In the CH 657 386 A discloses a bale opener, which moves the Abtragarm circular over the fiber bales to be opened. In this case, the Abtragarm is moved in height over four arranged at the corners threaded rods. By simultaneously turning the threaded rods of the Abtragarm is raised or lowered. The threaded rods are connected via a gear to ensure a synchronous movement of the threaded rods.

Weiter offenbart die JP S63 102772 U einen Ballenöffner, bei welchem der Abtragarm um einen stationären Turm rotiert. Die Höhenverstellung des Abtragarmes wird über die Drehung einer im Abtragturm verankerten Hubspindel vorgenommen. Die SU 32 342 A1 offenbart einen Ballenöffner welcher ein auf einer zentralen, starr verankerten Hubspindel gehaltenes Abtragorgan aufweist.Next discloses the JP S63 102772 U a bale opener, in which the Abtragarm rotates about a stationary tower. The height adjustment of the Abtragarmes is made via the rotation of an anchored in the Abtragturm lifting spindle. The SU 32 342 A1 discloses a bale opener which has a held on a central, rigidly anchored lifting spindle Abtragorgan.

Nachteilig an der offenbarten Bauweise nach dem Stand der Technik ist die aufwändige Konstruktion der Hubwerke, welche entweder eine von der eigentlichen Bewegung unabhängige Aufhängung notwendig machen, oder über mehrere gleichzeitig den Abtragarm bewegende Hubantriebe verfügen müssen. Dies hat auch zur Folge, dass eine exakte Ausrichtung des Abtragarms in Bezug auf die zu öffnenden Faserballen kompliziert ist und aufgrund betrieblicher Abnutzung periodisch eine Neueinstellung durchgeführt werden muss. Ebenfalls ist für die Positionierung und Steuerung des Hubwerkes eine aufwändige Sensorik notwendig.A disadvantage of the disclosed construction according to the prior art is the complex construction of the hoists, which either make a suspension independent of the actual movement necessary, or must have several simultaneously the Abtragarm moving linear actuators. This also has the consequence that an exact alignment of the Abtragarms is complicated with respect to the fiber bales to be opened and periodically re-adjustment must be performed due to operational wear. Likewise, an elaborate sensor system is necessary for the positioning and control of the hoist.

Die Aufgabe der Erfindung ist es einen Ballenöffner mit einem Abtragarm zu schaffen, welcher eine einfach steuerbare Höhenverstellung des Abtragarms zulässt und die Notwendigkeit einer separaten Aufhängung oder einer synchronen Bewegung in verschiedenen Antriebspunkten vermeidet.The object of the invention is to provide a bale opener with a Abtragarm, which allows easy controllable height adjustment of the Abtragarms and the Avoids the need for separate suspension or synchronous movement in different drive points.

Die Aufgabe wird gelöst durch die Merkmale im kennzeichnenden Teil des unabhängigen Anspruchs.The object is solved by the features in the characterizing part of the independent claim.

Zur Lösung der Aufgabe wird eine neuartige Höhenverstellung des Abtragarmes mit einer einzigen Hubspindel vorgeschlagen. Der Ballenöffner zum Abtragen von Faserflocken von Faserballen umfasst einen auf einem Fahrwerk oder Drehgestell angeordneten Abtragturm und einen Abtragarm, wobei der Abtragarm am Abtragturm in einer Führung höhenverstellbar gehalten ist. Für die Höhenverstellung des Abtragarms ist eine einzige Hubspindel mit einer Längsachse in Bewegungsrichtung des Abtragarms vorgesehen ist, wobei die Hubspindel am Abtragturm befestigt ist und der Abtragarm über eine Mutter mit der Hubspindel verbunden ist.To solve the problem, a novel height adjustment of the Abtragarmes is proposed with a single lifting spindle. The bale opener for removing fiber flakes from fiber bales comprises an ablation tower arranged on a chassis or bogie and a removal arm, the removal arm being held vertically adjustable in a guide on the ablation tower. For the height adjustment of the Abtragarms a single lifting spindle is provided with a longitudinal axis in the direction of movement of the Abtragarms, wherein the lifting spindle is attached to the Abtragturm and the Abtragarm is connected via a nut with the lifting spindle.

Im Abtragturm ist eine einzige Hubspindel, beispielsweise eine Gewindespindel, vorgesehen. Die Hubspindel ist am Abtragturm ortsfest befestigt, wobei die Befestigung derart ausgeführt ist, dass die Hubspindel mit ihrer Längsachse in der senkrechten Bewegungsrichtung des Abtragarmes verläuft. Der Abtragarm ist über eine Mutter mit der Hubspindel verbunden. Durch eine Drehung der Mutter bei feststehender Hubspindel wird der Abtragturm abhängig von der Drehrichtung entlang der Längsachse nach unten oder nach oben bewegt.In Abtragturm a single lifting spindle, for example, a threaded spindle is provided. The lifting spindle is fixedly secured to the removal tower, wherein the attachment is designed such that the lifting spindle extends with its longitudinal axis in the vertical direction of movement of the Abtragarmes. The Abtragarm is connected via a nut with the lifting spindle. By rotating the nut with a fixed lifting spindle, the removal tower is moved downwards or upwards depending on the direction of rotation along the longitudinal axis.

Erfindungsgemäß ist der Abtragarm über eine Kugelumlaufmutter mit der Hubspindel verbunden. Dadurch ergibt sich aus der Kombination der Kugelumlaufmutter mit der Hubspindel ein Kugelgewindetrieb. Zwischen der Hubspindel und der Mutter bewegen sich in Laufrillen Kugeln, die beim Drehen axial wandern. Ein Rückführkanal in der Kugelumlaufmutter befördert die Kugeln wieder zurück und schliesst damit den Kreislauf in dem die Kugeln zirkulieren. Kugelgewindetriebe haben gegenüber Gewindetrieben den Vorteil, dass durch eine Punktanlage der Kugeln und deren Rollbewegung eine geringere Antriebsleistung notwendig ist und sich eine genauere Positionierbarkeit ergibt. Der Kugelgewindetrieb kann nahezu spielfrei eingestellt werden und ermöglicht daher eine exakte Ausführung kleinster Bewegungen des Abtragarmes in Richtung der Längsachse der Hubspindel.According to the Abtragarm is connected via a recirculating ball nut with the lifting spindle. This results from the combination of the ball nut with the lifting spindle a ball screw. Between the lifting spindle and the nut, balls that move axially as they move rotate in the grooves. A return channel in the recirculating ball nut moves the balls back to close the circuit in which the balls circulate. Ball screws have the advantage over screw drives that a lower drive power is required by a point contact of the balls and their rolling motion and results in a more precise positioning. The ball screw can be adjusted almost free of play and therefore allows an exact execution of smallest movements of the Abtragarmes in the direction of the longitudinal axis of the lifting spindle.

Weiter ist es von Vorteil, wenn die Führung des Abtragarms im Abtragturm derart gestaltet ist, dass die Hubspindel nur mit Kräften in ihrer Längsachse belastet ist. Besonders vorteilhaft ist der Abtragarm in Führungsschienen am Abtragturm gehalten. Die Führungsschienen sind derart ausgebildet, dass sämtliche Querkräfte und Kippmomente des auskragenden Abtragarms durch die Führung aufgenommen werden. Die Konstruktion der Führungsschienen ist derart gestaltet, dass für den Abtragarm nur eine Bewegung in der Längsachse der Hubspindel möglich ist und die Kräfte in zwei linearen und drei Rotationsachsen durch die Führung aufgenommen werden. Die Führungsschienen können als einfache Längsprofile ausgeführt sein. Dabei werden an die Führungsschienen von drei Seiten Gleitelemente oder Rollen angelegt, wobei die Gleitelemente oder Rollen am Abtragarm angebracht sind.Further, it is advantageous if the leadership of the Abtragarms in Abtragturm is designed such that the lifting spindle is loaded only with forces in its longitudinal axis. Particularly advantageously, the Abtragarm is held in guide rails on Abtragturm. The guide rails are designed such that all transverse forces and tilting moments of the projecting Abtragarms are received by the guide. The design of the guide rails is designed such that only a movement in the longitudinal axis of the lifting spindle is possible for the Abtragarm and the forces are absorbed in two linear and three axes of rotation through the guide. The guide rails can be designed as simple longitudinal profiles. In this case, sliding elements or rollers are applied to the guide rails from three sides, wherein the sliding elements or rollers are mounted on the Abtragarm.

Da sämtliche Querkräfte und auch Kippmomente, welche sich aus der auskragenden Anordnung des Abtragarms ergeben, durch die Führung des Abtragarms im Abtragturm aufgenommen werden, spielt es keine Rolle wo genau die Hubspindel angeordnet ist. Die Hubspindel kann seitlich am Abtragarm angeordnet sein, wodurch sich Vorteile für die Positionierung eines Fasertransportkanals innerhalb des Abtragarms und des Abtragturmes ergeben. Bevorzugterweise ist die Hubspindel ausserhalb der Schwerpunktsachsen des Abtragarms angeordnet. Bei einer derartigen Anordnung kippt der Abtragarm in eine vorbestimmte Richtung, wodurch sich in der Führung eine definierte Lage ergibt. Dadurch dass auf die Führung ein Kippmoment in einer durch die Anordnung der Hubspindel bestimmten Richtung wirkt, ist es möglich eine spielfreie Einstellung der Führung zu erreichen.Since all lateral forces and tilting moments, which result from the cantilevered arrangement of the Abtragarms are absorbed by the leadership of the Abtragarms in the ablation tower, it does not matter where exactly the lifting spindle is arranged. The lifting spindle can be arranged on the side of the Abtragarm, resulting in advantages for the positioning of a fiber transport channel within the Abtragarms and the Abtragturmes. Preferably, the lifting spindle is arranged outside the center of gravity axes of the Abtragarms. In such an arrangement, the Abtragarm tilts in a predetermined direction, resulting in a defined position in the guide. Because a tilting moment acts on the guide in a direction determined by the arrangement of the lifting spindle, it is possible to achieve a backlash-free adjustment of the guide.

Vorteilhafterweise können am Abtragturm zwei beabstandete U-förmige Führungsschienen mit ihrer Längsachse in der Bewegungsrichtung des Abtragturms angeordnet sein. Die Öffnungen der U-förmigen Führungsschienen zeigen dabei in die Richtung der jeweils gegenüberliegenden Führungsschiene. Am Abtragarm sind Führungselemente, beispielsweise Rollen oder Gleitelemente, befestigt, welche an die Führungsschienen des Abtragturmes angelegt sind. Die Führungselemente sind derart gestaltet, dass ein Kippen des Abtragarmes um die beiden waagerechten Achsen des Abtragarmes verhindert wird. Zudem bewirken die Führungselemente eine seitliche Führung des Abtragarmes in seiner senkrechten Bewegungsrichtung. Am Abtragarm sind Rollen oder Gleitelemente angebracht, welche derart an die Führungsschienen der Führung im Abtragturm angelegt sind, dass eine spielfreie Führung des Abtragarms gegeben ist.Advantageously, two spaced U-shaped guide rails can be arranged with their longitudinal axis in the direction of movement of the ablation tower on the ablation tower. The openings of the U-shaped guide rails point in the direction of the respective opposite guide rail. At the Abtragarm guide elements, such as rollers or sliding elements, attached, which are applied to the guide rails of the Abtragturmes. The guide elements are designed such that a tilting of the Abtragarmes is prevented around the two horizontal axes of the Abtragarmes. In addition, the guide elements cause a lateral guidance of the Abtragarmes in its vertical direction of movement. On Abtragarm rollers or sliding elements are mounted, which are so created on the guide rails of the guide in the ablation tower that a play-free guidance of the Abtragarms is given.

Erfindungsgemäß, ist die Befestigung der Hubspindel am Abtragturm nur an einem oberen Ende der Hubspindel vorgesehen und die Hubspindel an einem unteren Ende nicht im Abtragturm gehalten ist. Durch diese Art der Befestigung der Hubspindel, welche einem Aufhängen gleichkommt, ergeben sich optimale Verhältnisse für den Betrieb des Kugelgewindetriebes. Eine Einspannung der Hubspindel durch eine obere und untere Befestigung kann aufgrund von Temperaturunterschieden oder auftretenden Spannungen innerhalb der Hubspindel zu Querkräften an der Kugelumlaufmutter führen.According to the invention, the attachment of the lifting spindle is provided on the ablation tower only at an upper end of the lifting spindle and the lifting spindle is not held in the ablation tower at a lower end. This type of fastening of the lifting spindle, which equates to hanging, results in optimum conditions for the operation of the ball screw drive. A clamping of the lifting spindle by an upper and lower mounting can lead to lateral forces on the ball nut due to temperature differences or stresses occurring within the lifting spindle.

Bevorzugterweise ist die Hubspindel drehfest im Abtragturm gehalten und die Kugelumlaufmutter mit einem Antrieb versehen. Die Kugelumlaufmutter, welche eine Verbindung zwischen dem Abtragarm und der Hubspindel schafft wird durch einen Antrieb in Drehung versetzt und bewirkt eine Bewegung des Abtragarms in Richtung der Längsachse der Hubspindel. Besonders vorteilhaft ist die Verwendung eines Synchron-Servomotors für den Antrieb der Kugelumlaufmutter. Ein derartiger Antrieb hat den Vorteil, dass eine bestimmte Anzahl von Umdrehungen oder Teilen von Umdrehungen ausgeführt werden können. Bevorzugterweise ist die Hubspindel auf beiden Seiten der Kugelumlaufmutter durch eine Schutzhülle umgeben, beispielsweise einen Faltenbalg, die sich in ihrer Längenausdehnung der jeweiligen Position der Kugelumlaufmutter auf der Spindel anpasst.Preferably, the lifting spindle is rotatably held in the ablation tower and provided the ball nut with a drive. The ball nut, which creates a connection between the Abtragarm and the lifting spindle is rotated by a drive in rotation and causes a movement of the Abtragarms in the direction of the longitudinal axis of the lifting spindle. Particularly advantageous is the use of a synchronous servo motor for driving the ball nut. Such a drive has the advantage that a certain number of revolutions or parts of revolutions can be performed. Preferably, the lifting spindle is surrounded on both sides of the ball nut by a protective cover, for example a bellows, which adapts in its longitudinal extension of the respective position of the ball nut on the spindle.

Vorteilhafterweise erfolgt durch Sensoren im Antrieb durch die Feststellung der gefahrenen Umdrehungen eine Bestimmung der Positionierung des Abtragarms in seiner Höhe. Ebenfalls wird dadurch eine definierte Höhenverstellung des Abtragarms ermöglicht. Die Position des Abtragarms in seiner Höhe ist nach einer erstmaligen Eichung durch den Antrieb gegeben und auch einstellbar. Aufwändige Sensoren, wie beispielsweise Lichtschranken oder Wegmessungen, zur Einstellung der Höhe des Abtragarms sind dadurch nicht mehr notwendig. Auch ein Anfahren von Referenzpunkten ist nicht notwendig. Synchron-Servomotoren haben auch die Eigenschaft, dass bereits im Anlauf das höchstmögliche Drehmoment zur Verfügung steht und damit eine Bewegung des Abtragarmes auch in kleinsten Bereichen ermöglicht wird.Advantageously, a determination of the positioning of the Abtragarms in its height by sensors in the drive by the determination of the driven revolutions. Also, this allows a defined height adjustment of the Abtragarms. The position of the Abtragarms in its height is given by a first calibration by the drive and also adjustable. Elaborate sensors, such as light barriers or path measurements, to adjust the height of the Abtragarms are no longer necessary. It is also not necessary to approach reference points. Synchronous servomotors also have the property that the highest possible torque is already available during start-up and thus a movement of the Abtragarmes is made possible even in the smallest areas.

Bevorzugterweise erfolgt die Befestigung der Hubspindel im Abtragturm über eine Kraftmessdose. Die Hubspindel wird dabei an einer Kraftmessdose aufgehängt, welche am Abtragturm befestigt ist. Da an der Hubspindel wiederum über die Kugelumlaufmutter der Abtragturm hängt, kann über die Kraftmessdose das Gewicht des Abtragarms und der Hubspindel, welche an der Kraftmessdose befestigt sind, bestimmt werden.Preferably, the attachment of the lifting spindle in the ablation tower via a load cell. The lifting spindle is suspended on a load cell, which is attached to the removal tower. Since the lifting spindle in turn depends on the recirculating ball nut of the removal tower, the weight of the Abtragarms and the lifting spindle, which are attached to the load cell can be determined via the load cell.

Ausschlaggebend für die Präzision mit welcher das Hubwerk des Abtragarmes betrieben werden kann ist unter anderem die Dimension der Hubspindel und die Steigung. Die Steigung wird dabei gemessen als die Weglänge welche die Kugelumlaufmutter während einer Umdrehung der Hubspindel zurücklegt. Es hat sich gezeigt, dass sich Hubspindeln mit einem Durchmesser von 20 mm bis 75 mm für den Dauerbetrieb eignen, bevorzugterweise ist der Durchmesser der Hubspindel zwischen 30 mm und 50 mm zu wählen. Die Steigung der Hubspindel beträgt bei Verwendung einer Kugelumlaufmutter vorteilhafterweise 5 mm bis 40 mm, besonders bevorzugt 10 mm bis 20 mm. Bei Verwendung einer Gewindemutter sind mehrgängige Hubspindeln von Vorteil.Decisive for the precision with which the lifting mechanism of the Abtragarmes can be operated, among other things, the dimension of the lifting spindle and the slope. The pitch is measured as the path length which the ball nut travels during one revolution of the lifting spindle. It has been found that lifting spindles with a diameter of 20 mm to 75 mm are suitable for continuous operation, preferably, the diameter of the lifting spindle between 30 mm and 50 mm to choose. When using a recirculating ball nut, the pitch of the lifting spindle is advantageously 5 mm to 40 mm, particularly preferably 10 mm to 20 mm. When using a threaded nut multi-speed lifting spindles are beneficial.

Weiter ist es vorteilhaft, wenn die Führung zumindest eine Kombirolle umfasst. Eine Kombirolle ersetzt zwei in orthogonal zueinander stehenden Achsen angeordnete Rollen und hat dadurch den Vorteil, eine platzsparende Anordnung der notwendigen Führungsrollen zu verwirklichen. Die Kombirolle setzt sich zusammen aus einer Querführungsrolle und einer Längsführungsrolle, welche einen gemeinsamen Lagerzapfen zur drehfesten Halterung der Kombirolle aufweisen. Dabei dreht die Querführungsrolle um die Achse welche auch die Lage des Lagerzapfens bestimmt. Dadurch ergibt sich durch die Anordnung der Querführungsrolle eine Führung quer zur Achse des Lagerzapfens. Die Längsführungsrolle dreht hingegen in einer Achse welche quer (orthogonal) zur Achse des Lagerzapfens angeordnet ist und bewirkt durch ihre Oberfläche eine Führung in Richtung der Achse des Lagerzapfens. Bevorzugterweise werden vier Kombirollen eingesetzt. Dabei werden die Kombirollen in rechteckiger Anordnung am Abtragarm oder am Abtragturm befestigt.Further, it is advantageous if the guide comprises at least one combination roller. A combination roller replaces two arranged in mutually orthogonal axes axes rollers and thus has the advantage of realizing a space-saving arrangement of the necessary guide rollers. The combination roller is composed of a transverse guide roller and a longitudinal guide roller, which have a common bearing pin for rotationally fixed support of the combination roller. The cross guide roller rotates about the axis which also determines the position of the journal. This results from the arrangement of the transverse guide roller a guide transversely to the axis of the journal. The longitudinal guide roller, however, rotates in an axis which is arranged transversely (orthogonal) to the axis of the journal and causes by its surface a guide in the direction of the axis of the journal. Preferably, four combination rollers are used. The combination rollers are mounted in a rectangular arrangement on the Abtragarm or the Abtragturm.

Aus dem Stand der Technik sind Ballenöffner mit einer oder mehreren Abtragwalzen bekannt. Die erfindungsgemässe Ausführung des Ballenöffners ist davon unabhängig, ob eine oder mehrere Abtragwalzen eingesetzt werden.Bale openers with one or more removal rollers are known from the prior art. The inventive embodiment of the bale opener is independent of whether one or more removal rollers are used.

Im Folgenden wird die Erfindung anhand von einer beispielhaften Ausführungsform erklärt und durch Zeichnungen näher erläutert.

Fig. 1
Schematische Darstellung eines Ballenöffners in einer Draufsicht
Fig. 2
Schematische Darstellung eines Ballenöffners in einer Ansicht
Fig. 3
Schematische Schnittdarstellung A-A nach Figur 2
Fig. 4
Schematische Darstellung einer Draufsicht nach der Figur 3
In the following the invention will be explained with reference to an exemplary embodiment and explained in more detail by drawings.
Fig. 1
Schematic representation of a bale opener in a plan view
Fig. 2
Schematic illustration of a bale opener in a view
Fig. 3
Schematic sectional view AA after FIG. 2
Fig. 4
Schematic representation of a plan view of the FIG. 3

Figur 1 und Figur 2 zeigen in einer schematischen Darstellung einen Ballenöffner 1 zum Abtragen von Faserflocken von Faserballen 2. Figur 1 zeigt den Ballenöffner 1 in einer Draufsicht und Figur 2 in einer Ansicht. Der Ballenöffner 1 besteht im Wesentlichen aus einem Abtragturm 3 und einem Abtragarm 5. Der Abtragarm 5 ist am Abtragturm 3 einseitig befestigt und frei auskragend über den Faserballen 2 angeordnet. Der Abtragturm 3 ist mit einem Fahrwerk 4 ausgerüstet. Mit Hilfe des Fahrwerks 4 wird der Abtragturm 3 auf Schienen entlang den Faserballen 2 bewegt. Durch diese Bewegung 13 wird der am Abtragturm 3 angebrachte Abtragarm 5 über die Oberfläche der Faserballen 2 geführt. Im Abtragarm 1 ist ein Abtragorgan, meist eine oder mehrere Abtragwalzen 15 angeordnet. Die Abtragwalze 15 entnimmt aus den Faserballen 2 Faserflocken 16. Die Faserflocken 16 werden durch den Abtragarm 5 und den Abtragturm 3 und zu einem pneumatischen Faserflocken-Transportsystem 17 gebracht. Das Faserflocken-Transportsystem 17 und damit auch der Transportweg von der Abtragwalze 15 zum Faserflocken-Transportsystem 17 stehen unter einem bestimmten Unterdruck, der zur pneumatischen Förderung der Faserflocken von der Abtragwalze 15 durch das Faserflockentransport-System 17 dient. FIG. 1 and FIG. 2 show in a schematic representation of a bale opener 1 for removing fiber flakes of fiber bales. 2 FIG. 1 shows the bale opener 1 in a plan view and FIG. 2 in a view. The bale opener 1 consists essentially of an ablation tower 3 and a Abtragarm 5. The Abtragarm 5 is attached to the Abtragturm 3 on one side and freely cantilevered over the fiber bale 2. The Abtragturm 3 is equipped with a chassis 4. With the help of the chassis 4, the ablation tower 3 is moved on rails along the fiber bale 2. As a result of this movement 13, the removal arm 5 attached to the removal tower 3 is guided over the surface of the fiber bales 2. In Abtragarm 1 a Abtragorgan, usually one or more Abtragwalzen 15 is arranged. The removal roller 15 takes from the fiber bale 2 fiber flakes 16. The fiber flakes 16 are brought by the Abtragarm 5 and the Abtragturm 3 and to a pneumatic fiber flake transport system 17. The fiber flake transport system 17 and thus also the transport path from the removal roller 15 to the fiber flake transport system 17 are under a certain negative pressure, which is used for pneumatic conveying of the fiber flakes from the discharge roller 15 by the fiber fluff transport system 17.

Die Befestigung des Abtragarms 5 am Abtragturm 3 ist höhenverstellbar ausgeführt, sodass die Faserballen 2 kontinuierlich abgetragen werden können. Die Bewegung 14 des Abtragturms 5 dient dazu eine gleichmässige Abtragung der Faserflocken 16 von der Oberfläche der Faserballen 2 zu gewährleisten.The attachment of Abtragarms 5 on Abtragturm 3 is made adjustable in height, so that the fiber bales 2 can be removed continuously. The movement 14 of the ablation tower 5 serves to ensure a uniform removal of the fiber flakes 16 from the surface of the fiber bales 2.

Figur 3 zeigt eine schematische Ansicht des Abtragarms 5 in einer Schnittdarstellung A-A nach Figur 2. Der Abtragarm 5 ist schematisch und nur teilweise sowie ohne die Abtragwalze dargestellt. Es ist das Hubwerk zur Bewegung 14 des Abtragarms 5 in einer beispielhaften Ausführung gezeigt. Am Abtragarm 5 befestigt ist eine Kugelumlaufmutter 9. Die Kugelumlaufmutter 9 umschliesst eine Hubspindel 6. Die Kugelumlaufmutter 9 ist mit ihrem Gehäuse am Abtragarm 5 drehfest gehalten. Die Kugelumlaufmutter 9 wird durch einen Antrieb (nicht gezeigt) in Drehung versetzt, wodurch diese zusammen mit dem Abtragarm 5 der Hubspindel 6 entlang läuft. Die Hubspindel 6 ist mit ihrem oberen Ende mit einer Befestigung 18 am Abtragturm 3 drehfest gehalten. Die Hubspindel 6 ist in der Befestigung 18 aufgehängt, sodass keine untere Sicherung der Hubspindel 6 notwendig ist. Oberhalb sowie unterhalb der Kugelumlaufmutter 9 ist die Hubspindel 6 von jeweils einem Faltenbalg 19 umschlossen. Der Faltenbalg 19 passt sich automatisch der jeweiligen Länge des Abschnitts der Hubspindel 6 an und vermeidet, dass durch Verschmutzung der Gewinderillen der Hubspindel 6 eine Störung des Kugelgewindetriebs auftreten können. FIG. 3 shows a schematic view of the Abtragarms 5 in a sectional view AA after FIG. 2 , The Abtragarm 5 is shown schematically and only partially and without the removal roller. It is the lifting mechanism for movement 14 of the Abtragarms 5 in one exemplary embodiment shown. Attached to Abtragarm 5 is a ball nut 9. The ball nut 9 encloses a lifting spindle 6. The ball nut 9 is rotatably held with its housing on the Abtragarm 5. The ball nut 9 is rotated by a drive (not shown), whereby it runs along with the Abtragarm 5 of the lifting spindle 6 along. The lifting spindle 6 is held against rotation with its upper end with a fastening 18 on the ablation tower 3. The lifting spindle 6 is suspended in the attachment 18, so that no lower securing the lifting spindle 6 is necessary. Above and below the ball nut 9, the lifting spindle 6 is enclosed by a respective bellows 19. The bellows 19 adapts automatically to the respective length of the section of the lifting spindle 6 and avoids that contamination of the threaded grooves of the lifting spindle 6 can cause a malfunction of the ball screw.

Ebenfalls im Abtragturm 3 gehalten ist die Führung 7 des Abtragarms 5. Die Führung setzt sich zusammen aus zwei sich gegenüberstehenden U-förmigen Führungsschienen 8 und die am Abtragarm 5 vorgesehenen Querrollen 20 und Längsrollen 21. Die Querrollen 20 und die Längsrollen 21 sind auf jeder Seite der Führung 7 paarweise angeordnet und greifen in die Führungsschiene 8. Die Querrollen 20 berühren die U-förmige Führungsschiene 8 in ihrem rückwärtigen, am Abtragturm 3 befestigten, Flansch. Durch die Querrollen 20 wird der Abtragarm in Querrichtung geführt. Zusätzlich verhindern die Querrollen 20 ein Verdrehen des Abtragarms 5 um seine Längsachse 22. Die Längsrollen 21 sind versetzt zueinander angeordnet und berühren die U-förmigen Führungsschienen 8 in den vom rückwärtigen Flansch abstehenden Stegen. Die Längsrollen 21 dienen dazu den Abtragarm 5 in der Längsachse 22 des Abtragarms 5 zu positionieren und dadurch in der Waagerechten zu halten und gleichzeitig ein Verdrehen der Abtragarmes um die Längsachse 8 der Hubspindel 6 zu verhindern. Die in den Längsrollen 21 und den Querrollen 20 mit Pfeilen angegeben Drehrichtungen ergeben sich bei einer Bewegung 14 des Abtragarms 5 nach oben. Anstelle der Verwendung der einzelnen Querrollen 20 und die Längsrollen 21 können jeweils eine Querrolle 20 und eine Längsrolle 21 zur einer Kombirolle mit einem gemeinsamen Lagerzapfen zusammengefasst werden.The guide is composed of two opposing U-shaped guide rails 8 and provided on the Abtragarm 5 transverse rollers 20 and longitudinal rollers 21. The transverse rollers 20 and the longitudinal rollers 21 are on each side the guide 7 arranged in pairs and engage in the guide rail 8. The transverse rollers 20 touch the U-shaped guide rail 8 in its rear, attached to the discharge tower 3, flange. By the transverse rollers 20 of the Abtragarm is guided in the transverse direction. In addition, the transverse rollers 20 prevent rotation of the Abtragarms 5 about its longitudinal axis 22. The longitudinal rollers 21 are offset from each other and touch the U-shaped guide rails 8 in the protruding from the rear flange webs. The longitudinal rollers 21 serve to position the Abtragarm 5 in the longitudinal axis 22 of the Abtragarms 5 and thereby keep in the horizontal while preventing rotation of the Abtragarmes about the longitudinal axis 8 of the lifting spindle 6. The direction of rotation indicated by arrows in the longitudinal rollers 21 and the transverse rollers 20 results in a movement 14 of the Abtragarms 5 upwards. Instead of using the individual transverse rollers 20 and the longitudinal rollers 21, a transverse roller 20 and a longitudinal roller 21 can each be combined to form a combined roller with a common journal.

Figur 4 zeigt eine schematische Draufsicht des Abtragarms 5 nach Figur 2. Der Abtragarm 5 ist frei auskragend am Abtragturm 3 über die Führung 7 gehalten. Die Führung 7 ist durch zwei sich gegenüberstehende U-förmige Führungsschienen 8, welche am Abtragturm 3 befestigt sind, und paarweise angeordnete Querrollen 20 und Längsrollen 21, welche am Abtragarm 5 gehalten sind, ausgeführt. In der Darstellung nach Figur 4 sind nur zwei sich gegenüberliegende Quer- und Längsrollenpaare 20, 21 gezeigt. Es sind jedoch ebenfalls auf beiden Seiten zwei übereinander liegende Quer- und Längsrollenpaare 20, 21 angeordnet (siehe dazu Figur 3). Durch den Abtragarm 5 führt die Hubspindel 6 welche von der Kugelumlaufmutter 9 umfasst wird. Es ist auch eine Anordnung der Hubspindel 6 ausserhalb des Abtragarms 5 denkbar, da die Hubspindel nur Kräfte in ihrer Längsachse zu tragen hat und die Anordnung deshalb eine untergeordnete Rolle spielt. FIG. 4 shows a schematic plan view of the Abtragarms 5 after FIG. 2 , The Abtragarm 5 is cantilevered on Abtragturm 3 held on the guide 7. The guide 7 is by two opposing U-shaped guide rails 8, which are fixed to the ablation tower 3, and arranged in pairs transverse rollers 20 and longitudinal rollers 21, which are held on the Abtragarm 5 executed. In the illustration after FIG. 4 only two opposing transverse and longitudinal roller pairs 20, 21 are shown. However, there are also arranged on both sides two superimposed transverse and longitudinal roller pairs 20, 21 (see FIG. 3 ). Through the Abtragarm 5, the lifting spindle 6 which is encompassed by the ball nut 9. It is also an arrangement of the lifting spindle 6 outside the Abtragarms 5 conceivable because the lifting spindle only has to bear forces in its longitudinal axis and therefore the arrangement plays a minor role.

Die Kugelumlaufmutter 9 ist mit einem im Abtragarm befestigten Antrieb 10 verbunden. Durch den Antrieb 10 wird die Kugelumlaufmutter 9 in Drehung versetzt, was abhängig von der Drehrichtung zu einem Heben respektive Senken des Abtragarms 5 führt. Die Querrollen 20 und die Längsrollen 21 werden dabei in den Führungsschienen 8 um ihre Achsen bewegt und halten den Abtragarm 5 auf der durch die Führungsschienen 8 vorgegebenen Bahn. Anstelle der Quer- und Längsrollen 20, 21 können auch Gleitelemente mit entsprechenden Abmessungen eingesetzt werden.The ball nut 9 is connected to a drive 10 mounted in the Abtragarm. By the drive 10, the ball nut 9 is set in rotation, which depending on the direction of rotation to a lifting respectively lowering the Abtragarms 5 leads. The transverse rollers 20 and the longitudinal rollers 21 are thereby moved in the guide rails 8 about their axes and hold the Abtragarm 5 on the predetermined by the guide rails 8 path. Instead of the transverse and longitudinal rollers 20, 21 and sliding elements can be used with appropriate dimensions.

LegendeLegend

11
BallenöffnerBale
22
Faserballenfiber bales
33
AbtragturmAbtragturm
44
Fahrwerklanding gear
55
Abtragarmcarrying-off
66
Hubspindellifting spindle
77
Führungguide
88th
Längsachse HubspindelLongitudinal axis of the lifting spindle
99
KugelumlaufmutterBall nut
1010
Antriebdrive
1111
Führungsschieneguide rail
1313
Bewegung AbtragturmMovement removal tower
1414
Bewegung AbtragarmMovement removal arm
1515
Abtragwalzeoff roller
1616
Faserflockenfiber flocks
1717
Faserflocken-TransportsystemFiber flocks transport system
1818
Befestigungattachment
1919
Faltenbalgbellow
2020
Querrollehandscroll
2121
Längsrollelongitudinal role
2222
Längsachse des AbtragarmsLongitudinal axis of the Abtragarms

Claims (9)

  1. A bale opener (1) for the take-off of fiber tufts from fiber bales (2), comprising a take-off tower (3), which is arranged on a horizontal drive (4) or a rotating frame, and comprising a take-off arm (5), wherein the take-off arm (5) is held on the take-off tower (3) in a guide (7) so as to be vertically adjustable, whereas a single lifting spindle (6) having a longitudinal axis (8) in the movement direction of the take-off arm (5) is provided for the vertical adjustment of the take-off tower (3), wherein the lifting spindle (6) is fastened on the take-off tower (3) in a stationary manner, characterized in that the fastening of the lifting spindle (6) on the take-off tower (3) is provided only at an upper end of the lifting spindle (6) and, at a lower end, the lifting spindle (6) is not held in the take-off tower (3) and that the take-off arm is connected to the lifting spindle (6) via a recirculating ball nut (9) and the lifting spindle (6) is held in a rotationally locked manner and the recirculating ball nut (9) is provided with a drive (10).
  2. The bale opener (1) according to claim 1, characterized in that the guide (7) of the take-off arm (5) in the take-off tower (3) is designed such that the lifting spindle (6) is loaded with forces only in the direction of the longitudinal axis (8) thereof.
  3. The bale opener (1) according to any one of the preceding claims, characterized in that the guide (7) comprises at least two mutually spaced, U-shaped guide rails (11), which are fastened on the take-off tower (3) in the direction of the longitudinal axis (8) of the lifting spindle (6).
  4. The bale opener (1) according to any one of the preceding claims, characterized in that the lifting spindle (6) is located outside of a centroid axis of the take-off arm (5).
  5. The bale opener (1) according to any one of the preceding claims, characterized in that rollers or gliding elements are installed on the take-off arm (5) and are placed against the guide (7) in the take-off tower (3) such that play-free guidance of the take-off arm (5) is given.
  6. The bale opener (1) according to any of the preceding claims, characterized in that the drive (10) is a synchronous servo-motor.
  7. The bale opener (1) according to any of the preceding claims, characterized in that sensors are provided in the drive (10), which make it possible to determine the vertical position of the take-off arm (5) and to perform a defined vertical adjustment of the take-off arm (5).
  8. The bale opener (1) according to any one of the preceding claims, characterized in that the lifting spindle (6) is fastened on the take-off tower (3) via a load cell (15).
  9. The bale opener (1) according to claim 5, characterized in that the rollers (5) installed on the take-off arm (5) comprise at least one combination roller, preferably four combination rollers.
EP15002767.0A 2014-10-16 2015-09-25 Bale opener Not-in-force EP3009538B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01581/14A CH710257A1 (en) 2014-10-16 2014-10-16 Bale.

Publications (2)

Publication Number Publication Date
EP3009538A1 EP3009538A1 (en) 2016-04-20
EP3009538B1 true EP3009538B1 (en) 2018-11-07

Family

ID=54608224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15002767.0A Not-in-force EP3009538B1 (en) 2014-10-16 2015-09-25 Bale opener

Country Status (4)

Country Link
US (1) US10190238B2 (en)
EP (1) EP3009538B1 (en)
CN (1) CN105523387A (en)
CH (1) CH710257A1 (en)

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CH714726A1 (en) * 2018-03-07 2019-09-13 Rieter Ag Maschf Low-abrasion for a bale opener.

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Also Published As

Publication number Publication date
US20160108559A1 (en) 2016-04-21
EP3009538A1 (en) 2016-04-20
CH710257A1 (en) 2016-04-29
CN105523387A (en) 2016-04-27
US10190238B2 (en) 2019-01-29

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