EP3628759A1 - Doffering gripper with split housing - Google Patents
Doffering gripper with split housing Download PDFInfo
- Publication number
- EP3628759A1 EP3628759A1 EP19197839.4A EP19197839A EP3628759A1 EP 3628759 A1 EP3628759 A1 EP 3628759A1 EP 19197839 A EP19197839 A EP 19197839A EP 3628759 A1 EP3628759 A1 EP 3628759A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- holding element
- membrane
- gripper
- wall
- coil
- 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.)
- Pending
Links
- 239000012528 membrane Substances 0.000 claims abstract description 61
- 239000000463 material Substances 0.000 claims description 4
- 239000011358 absorbing material Substances 0.000 claims description 3
- 238000007378 ring spinning Methods 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 16
- 238000009987 spinning Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
- D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
- D01H9/04—Doffing arrangements integral with spinning or twisting machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/02—Arrangements for removing spent cores or receptacles and replacing by supply packages at paying-out stations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/06—Supplying cores, receptacles, or packages to, or transporting from, winding or depositing stations
- B65H67/064—Supplying or transporting cross-wound packages, also combined with transporting the empty core
- B65H67/065—Manipulators with gripping or holding means for transferring the packages from one station to another, e.g. from a conveyor to a creel trolley
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
- D01H9/001—Bobbin-taking arrangements
- D01H9/003—Graspers operating under the action of a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the invention relates to a gripper for gripping a coil or coil sleeve and to a holding element for such a gripper according to the preamble of the independent claims. It also relates to a doffer comprising a doffer bar with at least one gripper according to the invention and to a ring spinning machine with such a doffer.
- the spinning machines have a doffer device with a doffer bar, which is arranged, for example, movably on the spinning machine via a scissor mechanism.
- a large number of grippers or doffer grippers are in turn arranged on the doffer bar in order to be able to grip and remove or attach the coils or the empty bobbin tubes together.
- the individual grippers can preferably be actuated pneumatically and contain a clamping element in the form of a membrane which can be pressurized with air, which is brought over the coil or coil sleeve and then grips the coil or coil sleeve by introducing compressed air.
- compressed air supply channels are arranged in the doffer bar, from which the compressed air is fed via feeds to the individual membranes of the grippers.
- the CN2873813Y describes an appropriately trained gripper.
- the gripper has a cylindrical holding element for receiving a coil or coil sleeve.
- a clamping element in the form of a rubber membrane is arranged on the inner wall of the holding element and can be adjusted via a pneumatic device. With the Membrane, it is possible to grasp the end region of the coil or coil sleeve inserted into the interior of the holding element from the outside.
- the membrane is fixed in the direction of a longitudinal axis on the holding element via two sealing caps, which are each arranged on the underside and top of the holding element. The two caps are clipped onto the holding element via a snap connection.
- the gripper comprises a fastening element for fastening to a doffer bar.
- the fastening element is firmly connected to the holding element and contains an air channel for the compressed air supply to the membrane.
- the fastening element has a hook on its upper side and an elastic holding tab on its lower side.
- the gripper is fixed to a holder via the hook and in a snap-in groove on the doffer bar via the elastic retaining tab.
- a similarly designed gripper is in the EP0303877A1 shown.
- the fastening element of the gripper has an elastic holding tab on its underside and on its top.
- the gripper can be disengaged and releasably attached to the doffer bar in two parallel locking grooves using the two elastic retaining tabs.
- the locking grooves allow a plurality of individual grippers to be attached along the doffer bar.
- the membrane When changing a coil or coil sleeve, the membrane is pressurized with compressed air via the air duct. As a result, the membrane contracts in the holding element and grasps the coil or coil sleeve at its end region from the outside. In order to release the coil or coil sleeve in the holding element again, the membrane is relieved by removing the compressed air. Due to the constantly changing load and relief of the membrane, and the friction of the membrane on the coil or coil sleeve, the membrane wears out after a certain operating time. The wear shows up in the fact that the membrane becomes porous and has leaks. As a result, a safe change of the coil or coil sleeve is no longer guaranteed. It is therefore necessary to replace the worn membrane with a new membrane after a certain period of operation.
- a major disadvantage of the gripper described is that the exchange of a worn membrane for a new membrane is very complex.
- the gripper To replace a membrane, the gripper must first be removed from the doffer bar by the operating personnel.
- the CN2873813Y the hook is released from the holder of the doffing bar and the elastic retaining tab is released from the locking groove or from the gripper EP0303877A1 the two elastic retaining tabs are released from the two parallel locking grooves.
- the upper and lower closure caps are then released from the holding element.
- the worn membrane is then separated from the holding element and replaced with a new membrane.
- the new membrane is then fixed again in the direction of the longitudinal axis of the holding element on the holding element by the closure caps and the gripper is attached to the doffing bar. Due to the structure of the gripper, the replacement of a worn membrane is very complex, since the entire gripper must be removed from the doffer bar. Replacing the membrane is therefore associated with long downtimes of the spinning machine. In addition, due to the frequent assembly and disassembly of the gripper on the doffer bar, there is unnecessary wear on the elastic holding tab of the gripper. As a result, a sufficient clamping effect of the elastic retaining tab in the locking groove on the doffer bar is not ensured.
- a gripper for gripping a coil or coil sleeve with a fastening element and a cylindrical holding element with a longitudinal axis in front the holding element having an inner wall and an outer wall, and on the inner wall a pneumatically actuated clamping element is arranged, which can be acted upon with compressed air via an air duct.
- a securing element the securing element partially enclosing the outer wall of the holding element.
- the gripper is made of plastic and has a cylindrical holding element for a coil or a coil sleeve.
- the holding element has an inner wall on which a pneumatically adjustable clamping element in the form of a membrane made of rubber is arranged.
- a pneumatically adjustable clamping element in the form of a membrane made of rubber is arranged.
- a sealing ring is arranged in the membrane and the fastening element and the securing element.
- the invention has for its object to provide a gripper for gripping a coil or coil sleeve with a holding element, which is characterized by a better sealing effect than the grippers known from the prior art.
- the invention is further based on the object of providing a gripper for gripping a coil or coil sleeve with a holding element which is distinguished by a shortened gripping time of the doffer.
- the invention is further based on the object of providing a gripper for gripping a coil or coil sleeve with a holding element which is distinguished by simplified production.
- a gripper for gripping a coil or coil sleeve and a holding element according to the preamble of the independent claims, which are characterized in that the membrane is integrally connected with a lower and / or upper edge of the holding element.
- the holding element advantageously has a lower and / or upper shoulder as an edge, the membrane being integrally connected to the lower and / or upper shoulder.
- the membrane can be integrally connected to one another only with a lower shoulder as the edge of the holding element.
- a cover is located at the upper end of the holding element, around which the membrane is guided. The edge of the lid slightly overlaps the edge of the holding element.
- the material connection between the holding element and the membrane can preferably be achieved by gluing, welding, vulcanizing or in another suitable manner.
- a groove can advantageously be formed on the security element and on the fastening element by a projection into which the shoulder of the holding element can be inserted. Furthermore, the cover can form an upper fixation of the holding element together with the upper edge of the securing element and the upper edge of the fastening element. For this purpose, the edges mentioned are bent inwards. In this way, a definite and secure hold of the holding element between the security element and the fastening element is ensured.
- the holding element can advantageously be cylindrical or tapered towards the top.
- the air duct can advantageously be arranged on the side of the outer wall or guided upwards on the outer wall. In this way, the holding element can be used in a variety of ways in different grips.
- the holding element can then be removed as a unit and exchanged as a whole.
- the downtime of the spinning machine during the exchange of a membrane is thereby kept to a minimum.
- Another advantage of the holding element is that it is compactly constructed as a unit and, due to the integral connection, it has a better sealing effect compared to the holding elements embodied in the prior art distinguished. Due to the conical design of the holding element, a secure hold of the coil or coil sleeve and a shorter gripping time of the doffer can advantageously also be achieved.
- the invention also relates to a doffer comprising a doffer bar with at least one gripper according to the invention and to a spinning machine with such a doffer.
- Fig. 1 shows a perspective view of a gripper 1 and Fig. 2 a longitudinal section through the gripper 1 according to Fig. 1 .
- the gripper 1 is made of plastic and has an upwardly tapered holding element 2 for a coil or coil sleeve 3.
- the holding element 2 has an inner wall 4, on which a pneumatically adjustable clamping element in the form of a membrane 5 made of rubber is arranged. With the membrane 5, it is possible to end the area in the interior of the holding element 2 inserted coil or coil sleeve 3 to be detected from the outside.
- the diaphragm 5 is adjusted in the direction of the double arrow 6 via a pneumatic device.
- the gripper 1 comprises a fastening element 7, as is known from the document WO2016059496 is known.
- the fastening element 7 comprises two elastic holding tabs 8 arranged at a distance from one another and a rigid support element arranged between the elastic holding tabs, the two elastic holding tabs 8 being connected to the fastening element 7 by a first end 9 and each by at least one second free end 10 a spring element are positioned in a rest position. With the second free end 10, the gripper 1 can be disengaged and detachably attached to the doffer bar. It is provided that the at least one spring element is formed in one piece with the free end 9, 10 of the respective elastic retaining tab 8 and the rigid support element.
- the holding element 2 is held on the fastening element 7 via a securing element 11.
- the securing element 11 encloses at least 180 ° of an outer wall 12 of the holding element 2.
- the securing element 11 thus forms part of the housing of the gripper 1 in addition to the fastening element 7.
- Via the securing element 11, the holding element 2 is secured to the fastening element 7 transversely to a longitudinal axis 13 .
- the securing element 11 is detachably connected to the fastening element 7 via a snap connection.
- the snap connection is designed such that the fastening element 7 elevations and the securing element 14 has two lateral tabs 14 with depressions which enclose the elevations or into which the elevations engage, as is the case, for example, in FIG Fig. 5 of the WO2016071789 is known.
- the fastening element 7 is fixedly connected to the holding element 2 and contains an air channel 16 for the compressed air supply to the membrane 5.
- the air channel 16 is connected to a compressed air line which extends in the longitudinal direction on the doffing bar.
- the air duct 16 is opposite the doffer bar via a first one on the fastening element 7 arranged sealing element 17 sealed.
- the sealing element 17 is designed as a sleeve made of rubber.
- the fastening element 7 also has a second sealing element 18, which seals the gripper 1 against a compressed air signal line, which likewise extends in the longitudinal direction on the doffer bar.
- the air duct 16 is firmly connected to the outer wall 12 of the holding element 2, i.e. the holding element 2 and the air duct 16 are formed in one piece.
- the air duct 16 has an annular shoulder 20 on its outer surface 19.
- the shoulder 19 extends over a length of 8 mm of the air duct 16 and is made of an elastic plastic.
- the shoulder 19 is integrally connected to the air duct 16.
- the fastening element 11 has a receptacle 21 for the air duct 12.
- the receptacle 21 is cylindrical and extends over the length of the air duct 16.
- the holding element 2 is loosely connected to the fastening element 7 via the shoulder 20 of the air duct 16. With a first end 22, the sealing element 17 lies against the annular shoulder 20 of the air duct 16.
- the sealing element 13 seals the air duct 12 from the compressed air line on the doffer bar. If compressed air is applied to the membrane 5, the air channel 16 expands in the radial direction in the receptacle 20. As a result, the shoulder 20 is pressed against the fastening element 11 and seals the air duct 16 with respect to the fastening element 7.
- Fig. 3 shows a perspective view of a holding element 2 and Fig. 4 a longitudinal section through the holding element 2 according to Fig. 3 .
- the holding element 2 tapers upwards with a step in the middle.
- the holding element 2 is preferably produced from an injection molding process.
- the membrane 5 can be glued, welded, vulcanized or cohesively connected in another suitable manner to the underside of the shoulder 24.
- a plastic laser welding process can preferably be used for this purpose.
- the holding element 2 can consist of a laser-absorbing material such as polyamide 6, and the membrane 5 can consist of a laser-permeable material such as a thermoplastic polyurethane (TPU).
- TPU thermoplastic polyurethane
- the edge of the cover 25 slightly overlaps the edge of the holding element 2 and the membrane 5 is guided between the holding element 2 and the cover 25 and around the cover 25.
- the membrane 5 is pulled down and tensioned between the holding element 2 and the cover 25 for a good sealing effect, so that the cover 25 is pressed onto the holding element 2.
- the membrane 5 is joined to the shoulder 24, glued or welded.
- the holding element 2 designed in this way is introduced between the securing element 11 and the fastening element 7, the annular shoulder 20 being inserted into the receptacle 21 (cf. Fig. 2 ).
- the shoulder 24 of the holding element 2 is inserted into the groove which is located below the rib 26.
- the upper edge 27 of the securing element 11 and the upper edge 28 of the fastening element 7 together with the cover 25 form the upper fixation.
- the mentioned edges 27, 28 are bent inwards, lie on the holding element 2 next to the cover 25 and are positively connected (cf. Fig. 1 ).
- the holding element 2 is tapered with a step in the embodiment shown, it can also have a different shape. It could be tapered upwards without a step or also cylindrical (not shown). According to a further embodiment, not shown, it would be conceivable to provide a shoulder at the upper end and also to weld the membrane 5 to the upper shoulder.
- Fig. 5 a perspective view of a second embodiment of a holding element 2 according to the invention.
- the holding element 2 is the same as that in FIG 3, 4 shown holding element 2 constructed, but has an upwardly directed air channel 29 with a plug that protrudes beyond the cover 25 and is connected there to a corresponding compressed air line.
- the air duct 29 is part of the upper section of the outer wall 12 and is integrated into the outer wall.
- This embodiment is, for example, for a double gripper like it is made of 2a, b or Fig. 5 of the WO2017085588 has become known.
- the holding element 2 is compactly constructed as a unit and is characterized by the material connection by a better sealing effect compared to the holding elements embodied in the prior art. Due to the conical design of the holding element, a secure hold of the coil or coil sleeve 3 and a shortened gripping time of the doffer can advantageously also be achieved.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Es ist ein Greifer (1) zum Greifen einer Spule oder Spulenhülse (3) offenbart, mit einem Befestigungselement (7); mit einem Halteelement (2), welches eine Aussenwandung (12) und eine Innenwandung (4) aufweist, und an der Innenwandung (4) eine pneumatisch betätigbare Membran (5) als Klemmelement zum Greifen einer Spule oder Spulenhülse (3) angeordnet ist, welche über einen Luftkanal (16) mit Druckluft beaufschlagbar ist; wobei das Haltelement (2) zwischen dem Sicherungselement (11) und dem Befestigungselement (7) angeordnet ist und wobei das Sicherungselement (11) die Aussenwandung (12) des Halteelements (2) teilweise umschliesst und mit dem Befestigungselement (7) verbunden ist. Die Membran (5) ist erfindungsgemäss mit einem unteren und/oder Rand des Halteelements (2), der als Absatz geformt sein kann, stoffschlüssig miteinander verbunden ist. Die Erfindung bezieht sich auch auf ein Halteelement (2) und einen entsprechenden Doffer mit einem Greifer (1). A gripper (1) for gripping a coil or coil sleeve (3) is disclosed, with a fastening element (7); with a holding element (2), which has an outer wall (12) and an inner wall (4), and on the inner wall (4) a pneumatically actuated membrane (5) is arranged as a clamping element for gripping a coil or coil sleeve (3), which compressed air can be applied via an air duct (16); wherein the retaining element (2) is arranged between the securing element (11) and the fastening element (7) and wherein the securing element (11) partially surrounds the outer wall (12) of the retaining element (2) and is connected to the fastening element (7). According to the invention, the membrane (5) is integrally connected to one another with a lower and / or edge of the holding element (2), which can be shaped as a shoulder. The invention also relates to a holding element (2) and a corresponding doffer with a gripper (1).
Description
Die Erfindung bezieht sich auf einen Greifer zum Greifen einer Spule oder Spulenhülse und auf ein Halteelement für einen solchen Greifer entsprechend dem Oberbegriff der unabhängigen Ansprüche. Sie bezieht sich zudem auf einen Doffer umfassend einen Dofferbalken mit mindestens einem erfindungsgemässen Greifer und auf eine Ringspinnmaschine mit einem solchen Doffer.The invention relates to a gripper for gripping a coil or coil sleeve and to a holding element for such a gripper according to the preamble of the independent claims. It also relates to a doffer comprising a doffer bar with at least one gripper according to the invention and to a ring spinning machine with such a doffer.
Bei einer Vielzahl von Spinnmaschinen, insbesondere bei Ringspinnmaschinen, werden bei einem Spulenwechselvorgang eine Vielzahl bereits fertig bewickelter Spulen bzw. Kopse gemeinsam an den Spinnstellen der Spinnmaschine abgenommen und durch leere Spulenhülsen ersetzt. Die Spinnmaschinen weisen hierzu eine Doffervorrichtung mit einem Dofferbalken auf, welcher beispielsweise über einen Scherenmechanismus beweglich an der Spinnmaschine angeordnet ist. An dem Dofferbalken ist wiederum eine Vielzahl von Greifern bzw. Doffergreifern angeordnet, um die Spulen bzw. die leeren Spulenhülsen gemeinsam greifen und abnehmen bzw. aufstecken zu können. Die einzelnen Greifer sind bevorzugt pneumatisch betätigbar und beinhalten ein druckluftbeaufschlagbares Klemmelement in Form einer Membran, welche über die Spule bzw. Spulenhülse gebracht wird und anschliessend die Spule bzw. Spulenhülse durch Einbringen von Druckluft greift. Zum Beaufschlagen der einzelnen Greifer mit Druckluft sind druckluftzuführende Kanäle im Dofferbalken angeordnet, von welchem die Druckluft über Zuführungen jeweils zu den einzelnen Membranen der Greifer geleitet wird.In the case of a large number of spinning machines, in particular in the case of ring spinning machines, a large number of coils or bobbins which have already been wound are removed together at the spinning positions of the spinning machine during a bobbin changing process and replaced by empty bobbin tubes. For this purpose, the spinning machines have a doffer device with a doffer bar, which is arranged, for example, movably on the spinning machine via a scissor mechanism. A large number of grippers or doffer grippers are in turn arranged on the doffer bar in order to be able to grip and remove or attach the coils or the empty bobbin tubes together. The individual grippers can preferably be actuated pneumatically and contain a clamping element in the form of a membrane which can be pressurized with air, which is brought over the coil or coil sleeve and then grips the coil or coil sleeve by introducing compressed air. To apply compressed air to the individual grippers, compressed air supply channels are arranged in the doffer bar, from which the compressed air is fed via feeds to the individual membranes of the grippers.
Die
Beim Wechseln einer Spule oder Spulenhülse wird die Membran über den Luftkanal mit Druckluft beaufschlagt. Die Membran zieht sich dadurch im Halteelement zusammen und erfasst die Spule oder Spulenhülse an ihrem Endbereich von aussen. Um die Spule oder Spulenhülse im Halteelement wieder freizugeben, wird die Membran durch Wegnahme der Druckluft entlastet. Aufgrund der ständig wechselnden Belastung und Entlastung der Membran, und der Reibung der Membran an der Spule oder Spulenhülse, nutzt sich die Membran nach einer bestimmten Betriebsdauer ab. Die Abnutzung zeigt sich darin, dass die Membran porös wird und undichte Stellen aufweist. Als Folge ist ein sicherer Wechsel der Spule oder Spulenhülse nicht mehr gewährleistet. Es ist daher notwendig, die abgenutzte Membran nach einer bestimmten Betriebsdauer gegen eine neue Membran auszutauschen.When changing a coil or coil sleeve, the membrane is pressurized with compressed air via the air duct. As a result, the membrane contracts in the holding element and grasps the coil or coil sleeve at its end region from the outside. In order to release the coil or coil sleeve in the holding element again, the membrane is relieved by removing the compressed air. Due to the constantly changing load and relief of the membrane, and the friction of the membrane on the coil or coil sleeve, the membrane wears out after a certain operating time. The wear shows up in the fact that the membrane becomes porous and has leaks. As a result, a safe change of the coil or coil sleeve is no longer guaranteed. It is therefore necessary to replace the worn membrane with a new membrane after a certain period of operation.
Ein wesentlicher Nachteil des beschriebenen Greifers besteht darin, dass sich der Austausch einer abgenutzten Membran gegen eine neue Membran als sehr aufwändig gestaltet. Um eine Membran auszutauschen, muss der Greifer zuerst vom Bedienpersonal vom Dofferbalken entfernt werden. Hierzu wird beim Greifer aus der
Um diesem Nachteil zu vermeiden schlägt
Der Erfindung liegt die Aufgabe zugrunde, einen Greifer zum Greifen einer Spule oder Spulenhülse mit einem Haltelement zu schaffen, der sich durch eine bessere Dichtwirkung als die aus dem Stand der Technik bekannten Greifer auszeichnet.The invention has for its object to provide a gripper for gripping a coil or coil sleeve with a holding element, which is characterized by a better sealing effect than the grippers known from the prior art.
Der Erfindung liegt weiter die Aufgabe zugrunde, einen Greifer zum Greifen einer Spule oder Spulenhülse mit einem Haltelement zu schaffen, der sich durch eine verkürzte Greifzeit des Doffers auszeichnet.The invention is further based on the object of providing a gripper for gripping a coil or coil sleeve with a holding element which is distinguished by a shortened gripping time of the doffer.
Der Erfindung liegt weiter die Aufgabe zugrunde, einen Greifer zum Greifen einer Spule oder Spulenhülse mit einem Haltelement zu schaffen, der sich durch eine vereinfachte Herstellung auszeichnet.The invention is further based on the object of providing a gripper for gripping a coil or coil sleeve with a holding element which is distinguished by simplified production.
Die Aufgaben werden durch die unabhängigen Patentansprüche gelöst, wobei die abhängigen Ansprüche vorteilhafte Ausführungsformen angeben.The objects are achieved by the independent claims, the dependent claims indicating advantageous embodiments.
Insbesondere werden die Aufgaben durch einen Greifer zum Greifen einer Spule oder Spulenhülse und ein Halteelement entsprechend dem Oberbegriff der unabhängigen Ansprüche gelöst, welche dadurch gekennzeichnet sind, dass die Membran mit einem unteren und/oder oberen Rand des Halteelements stoffschlüssig miteinander verbunden ist.In particular, the tasks are solved by a gripper for gripping a coil or coil sleeve and a holding element according to the preamble of the independent claims, which are characterized in that the membrane is integrally connected with a lower and / or upper edge of the holding element.
Vorteilhaft weist das Halteelement als Rand einen unteren und/oder oberen Absatz auf, wobei die Membran mit dem unteren und/oder oberen Absatz stoffschlüssig miteinander verbunden ist. Alternativ kann die Membran nur mit einem unteren Absatz als Rand des Haltelements stoffschlüssig miteinander verbunden sein. Ein Deckel befindet sich am oberen Ende des Haltelements, um welchen die Membran herum geführt ist. Der Rand des Deckels überlappt den Rand des Halteelements leicht. Vor dem Verschweissen am unteren Absatz wird die Membran zwischen Haltelement und dem Deckel nach unten gezogen und gespannt, so dass der Deckel auf das Haltelement gepresst wird. Diese Ausführungsform ergibt nicht nur eine einfache Herstellung, sondern auch eine gute Abdichtung der Membran. Die Haltelemente können auf diese Weise vorgefertigt und einfach ausgetauscht werden.The holding element advantageously has a lower and / or upper shoulder as an edge, the membrane being integrally connected to the lower and / or upper shoulder. Alternatively, the membrane can be integrally connected to one another only with a lower shoulder as the edge of the holding element. A cover is located at the upper end of the holding element, around which the membrane is guided. The edge of the lid slightly overlaps the edge of the holding element. Before welding the lower section, the membrane between the holding element and the cover is pulled down and tensioned, so that the cover is pressed onto the holding element. This embodiment not only results in simple manufacture, but also good sealing of the membrane. In this way, the holding elements can be prefabricated and easily replaced.
Der Stoffschluss zwischen Halteelement und Membran kann vorzugsweise durch Verkleben, Verschweissen, Vulkanisieren oder auf eine andere geeignete Art und Weise zustande kommen.The material connection between the holding element and the membrane can preferably be achieved by gluing, welding, vulcanizing or in another suitable manner.
Vorteilhaft kann am Sicherheitselement und am Befestigungselement eine Nut durch einen Vorsprung gebildet sein, in welche der Absatz des Halteelements einführbar ist. Weiter kann der Deckel zusammen mit dem oberer Rand von Sicherungselement und dem oberer Rand von Befestigungselement eine obere Fixierung des Haltelements bilden. Die genannten Ränder sind zu diesem Zweck nach innen gebogen. Auf diese Weise ist ein definiter und sicherer Halt des Halteelelements zwischen Sicherheitselement und Befestigungselement sichergestellt.A groove can advantageously be formed on the security element and on the fastening element by a projection into which the shoulder of the holding element can be inserted. Furthermore, the cover can form an upper fixation of the holding element together with the upper edge of the securing element and the upper edge of the fastening element. For this purpose, the edges mentioned are bent inwards. In this way, a definite and secure hold of the holding element between the security element and the fastening element is ensured.
Vorteilhaft kann das Halteelement zylindrisch oder sich nach oben verjüngend ausgeführt sein. Vorteilhaft kann der Luftkanal seitlich an der Aussenwandung angeordnet oder nach oben an der Aussenwandung geführt sein. Auf diese Weise ist das Halteelement vielseitig in verschiedenen Doffergreifern einsetzbar.The holding element can advantageously be cylindrical or tapered towards the top. The air duct can advantageously be arranged on the side of the outer wall or guided upwards on the outer wall. In this way, the holding element can be used in a variety of ways in different grips.
Zur Auswechselung einer Membran ist es vorteilhaft möglich, den Greifer am Dofferbalken zu belassen und das Halteelement vom Befestigungselement zu entfernen. Hierzu wird lediglich das Sicherungselement vom Befestigungselement abgenommen. Das Halteelement kann dann als eine Einheit entnommen und insgesamt ausgetauscht werden. Die Stillstandszeit der Spinnmaschine während der Auswechselung einer Membran wird dadurch gering gehalten. Ein weiterer Vorteil des Haltelements liegt darin, dass es kompakt als Einheit gebaut ist und sich durch die stoffschlüssige Verbindung durch eine bessere Dichtwirkung gegenüber den im Stand der Technik ausgeführten Halteelementen auszeichnet. Durch die konische Ausführung des Haltelements können vorteilhaft zudem ein sicherer Halt der Spule oder Spulenhülse und eine verkürzte Greifzeit des Doffers erreicht werden.To replace a membrane, it is advantageously possible to leave the gripper on the doffer bar and to remove the holding element from the fastening element. For this purpose, only the securing element is removed from the fastening element. The holding element can then be removed as a unit and exchanged as a whole. The downtime of the spinning machine during the exchange of a membrane is thereby kept to a minimum. Another advantage of the holding element is that it is compactly constructed as a unit and, due to the integral connection, it has a better sealing effect compared to the holding elements embodied in the prior art distinguished. Due to the conical design of the holding element, a secure hold of the coil or coil sleeve and a shorter gripping time of the doffer can advantageously also be achieved.
Die Erfindung bezieht sich auch auf einen Doffer umfassend einen Dofferbalken mit mindestens einem erfindungsgemässen Greifer und auf eine Spinnmaschine mit einem solchen Doffer.The invention also relates to a doffer comprising a doffer bar with at least one gripper according to the invention and to a spinning machine with such a doffer.
Weitere Vorteile der Erfindung sind in den nachfolgenden Ausführungsbeispielen beschrieben, wobei
- Fig. 1
- eine perspektivische Ansicht eines erfindungsgemässen Greifers;
- Fig. 2
- einen Längsschnitt durch den Greifer gemäss
Fig. 1 ; - Fig. 3
- eine perspektivische Ansicht einer ersten Ausführungsform eines erfindungsgemässen Haltelements;
- Fig. 4
- einen Längsschnitt durch das Halteelement gemäss
Fig. 3 ; und - Fig. 5
- eine perspektivische Ansicht einer zweiten Ausführungsform eines erfindungsgemässen Haltelements;
- Fig. 1
- a perspective view of a gripper according to the invention;
- Fig. 2
- a longitudinal section through the gripper
Fig. 1 ; - Fig. 3
- a perspective view of a first embodiment of a holding element according to the invention;
- Fig. 4
- a longitudinal section through the holding element according to
Fig. 3 ; and - Fig. 5
- a perspective view of a second embodiment of a holding element according to the invention;
Das Befestigungselement 7 umfasst zwei in einem Abstand zueinander angeordnete elastische Haltelaschen 8 und ein zwischen den elastischen Haltelaschen angeordnetes starres Stützelement, wobei die zwei elastischen Haltelaschen 8 mit einem ersten Ende 9 mit dem Befestigungselement 7 verbunden sind und mit einem zweiten freien Ende 10 jeweils über wenigstens ein Federelement in einer Ruhelage positioniert sind. Mit dem zweiten freien Ende 10 ist der Greifer 1 ausrastbar und lösbar am Dofferbalken anbringbar. Es ist vorgesehen, das wenigstens eine Federelement mit dem freien Ende 9, 10 der jeweiligen elastischen Haltelasche 8 und dem starren Stützelement einstückig auszubilden.The
Das Halteelement 2 ist über ein Sicherungselement 11 am Befestigungselement 7 gehalten. Das Sicherungselement 11 umschliesst dabei mindestens 180° einer Aussenwandung 12 des Halteelements 2. Das Sicherungselement 11 stellt somit neben dem Befestigungselement 7 ein Teil des Gehäuses des Greifers 1 dar. Über das Sicherungselement 11 ist das Halteelement 2 quer zu einer Längsachse 13 am Befestigungselement 7 gesichert. Das Sicherungselement 11 ist mit dem Befestigungselement 7 lösbar über eine Schnappverbindung verbunden. Die Schnappverbindung ist dabei derart ausgebildet, dass das Befestigungselement 7 Erhöhungen und das Sicherungselement 14 zwei seitliche Laschen 14 mit Vertiefungen aufweist, welche die Erhöhungen umschliessen bzw. in welche die Erhöhungen einrasten, wie dies beispielsweise aus der
Das Befestigungselement 7 ist mit dem Halteelement 2 fest verbunden und enthält einen Luftkanal 16 für die Druckluftzufuhr der Membran 5. Der Luftkanal 16 ist mit einer Druckluftleitung verbunden, welche sich in Längsrichtung am Dofferbalken erstreckt. Der Luftkanal 16 ist gegenüber dem Dofferbalken über ein erstes am Befestigungselement 7 angeordnetes Dichtungselement 17 abgedichtet. Das Dichtungselement 17 ist als eine Hülse aus Gummi ausgebildet. Das Befestigungselement 7 weist zudem ein zweites Dichtungselement 18 auf, das den Greifer 1 gegenüber einer Druckluftsignalleitung abdichtet, die sich ebenfalls in Längsrichtung am Dofferbalken erstreckt.The
Der Luftkanal 16 ist mit der Aussenwandung 12 des Halteelements 2 fest verbunden, d.h. das Halteelement 2 und der Luftkanal 16 sind einstückig ausgebildet. An seiner Aussenfläche 19 weist der Luftkanal 16 einen ringförmigen Absatz 20 auf. Der Absatz 19 erstreckt sich über eine Länge von 8 mm des Luftkanals 16 und ist aus einem elastischen Kunststoff. Der Absatz 19 ist einstückig mit dem Luftkanal 16 verbunden. Das Befestigungselement 11 weist eine Aufnahme 21 für den Luftkanal 12 auf. Die Aufnahme 21 ist zylindrisch ausgebildet und erstreckt sich über die Länge des Luftkanals 16. Das Halteelement 2 ist über den Absatz 20 des Luftkanals 16 lose mit dem Befestigungselement 7 verbunden. Mit einem ersten Ende 22 liegt das Dichtungselement 17 am ringförmigen Absatz 20 des Luftkanals 16 an. Mit einem zweiten Ende 23 dichtet das Dichtungselement 13 den Luftkanal 12 gegenüber der Druckluftleitung am Dofferbalken ab. Wird die Membran 5 mit Druckluft beaufschlagt, dehnt sich der Luftkanal 16 in radialer Richtung in der Aufnahme 20 aus. Hierdurch wird der Absatz 20 gegen das Befestigungselement 11 gedrückt und dichtet den Luftkanal 16 gegenüber dem Befestigungselement 7 ab.The
Das so ausgeführte Haltelement 2 wird zwischen dem Sicherungselement 11 und Befestigungselement 7 eingebracht, wobei der ringförmigen Absatz 20 in die Aufnahme 21 eingeführt wird (vgl.
Obwohl das Halteelement 2 in der gezeigten Ausführungsform verjüngend mit einer Stufe ausgeführt ist, kann es auch eine andere Form aufweisen. Es könnte nach oben verjüngend ohne Stufe oder auch zylindrisch ausgeführt sein (nicht dargestellt). Es wäre entsprechend einer weiteren nicht dargestellten Ausführungsform denkbar, am oberen Ende ein Absatz vorzusehen und die Membran 5 mit dem oberen Absatz ebenfalls zu verschweissen.Although the holding
Zur Auswechselung einer Membran 5 ist es möglich, den Greifer 1 am Dofferbalken zu belassen und das Halteelement 2 vom Befestigungselement 7 zu entfernen. Hierzu wird das Sicherungselement 11 vom Befestigungselement 7 abgenommen. Das Halteelement 2 kann dann als eine Einheit entnommen und einfach ausgetauscht werden. Die Stillstandszeit der Spinnmaschine während der Auswechselung einer Membran 5 wird dadurch gering gehalten. Zudem wird eine unnötige Abnutzung der elastischen Haltelaschen 8 am Befestigungselement 7 verhindert, da lediglich das Halteelement 2 vom Greifer 1 entfernt werden muss. Eine ausreichende Klemmwirkung der elastischen Haltelaschen 8 am Dofferbalken ist damit gewährleistet. Ein weiterer Vorteil des Haltelements 2 liegt darin, dass es kompakt als Einheit gebaut ist und sich durch die stoffschlüssige Verbindung durch eine bessere Dichtwirkung gegenüber den im Stand der Technik ausgeführten Halteelementen auszeichnet. Durch die konische Ausführung des Haltelements können vorteilhaft zudem ein sicherer Halt der Spule oder Spulenhülse 3 und eine verkürzte Greifzeit des Doffers erreicht werden.To replace a
- 11
- GreiferGripper
- 22nd
- HaltelementHolding element
- 33rd
- SpulenhülseCoil sleeve
- 44th
- InnenwandungInner wall
- 55
- Membranmembrane
- 66
- DoppelpfeilDouble arrow
- 77
- BefestigungselementFastener
- 88th
- HaltelaschenRetaining tabs
- 99
- erstes Endefirst end
- 1010th
- freies Endefree end
- 1111
- SicherungselementSecuring element
- 1212th
- AussenwandungOuter wall
- 1313
- LängsachseLongitudinal axis
- 1515
- LascheTab
- 1616
- LuftkanalAir duct
- 1717th
- DichtungselementSealing element
- 1818th
- DichtungselementSealing element
- 1919th
- AussenflächeOutside surface
- 2020th
- ringförmiger Absatzannular heel
- 2121
- Aufnahmeadmission
- 2222
-
erstes Ende des Dichtungselements 17first end of the sealing
element 17 - 2323
-
zweites Ende des Dichtungselements 17second end of the sealing
element 17 - 2424th
- Absatzparagraph
- 2525th
- Ripperib
- 2626
- Deckelcover
- 2727
-
Oberer Rand von Sicherungselement 11Upper edge of securing
element 11 - 2828
-
Oberer Rand von Befestigungselement 7Upper edge of
fastener 7 - 2929
- LuftkanalAir duct
Claims (15)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01178/18A CH715389A1 (en) | 2018-09-27 | 2018-09-27 | Gripper for gripping a coil or bobbin tube. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3628759A1 true EP3628759A1 (en) | 2020-04-01 |
Family
ID=67997381
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19197839.4A Pending EP3628759A1 (en) | 2018-09-27 | 2019-09-17 | Doffering gripper with split housing |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3628759A1 (en) |
KR (1) | KR20200036758A (en) |
CN (1) | CN110952177A (en) |
CH (1) | CH715389A1 (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH557777A (en) * | 1972-04-28 | 1975-01-15 | Zinser Textilmaschinen Gmbh | GRIPPING DEVICE. |
DE3214128A1 (en) * | 1982-04-16 | 1983-10-27 | Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt | PNEUMATIC GRIPPER |
EP0303877A1 (en) | 1987-08-18 | 1989-02-22 | Maschinenfabrik Rieter Ag | Device for the replacement of all the cores in a textile machine, in particular in a ring spinning machine |
CN2873813Y (en) | 2006-01-04 | 2007-02-28 | 东台纺织机械有限责任公司 | Yarn holder of spinning frame integral doffer |
CN200992611Y (en) * | 2007-01-05 | 2007-12-19 | 铜陵市松宝机械有限公司 | Bobbin gripper for spinning frame |
WO2016059496A1 (en) | 2014-10-16 | 2016-04-21 | Maschinenfabrik Rieter Ag | Fastening for a doffer gripper |
WO2016071789A1 (en) | 2014-11-03 | 2016-05-12 | Maschinenfabrik Rieter Ag | Doffer gripper having a split housing |
WO2017085588A1 (en) | 2015-11-19 | 2017-05-26 | Maschinenfabrik Rieter Ag | Doffer device having a double gripper for a spinning machine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2309754A1 (en) * | 1972-03-16 | 1973-09-27 | Nuova San Giorgio Spa | GRIPPING DEVICE FOR REMOVING FULL SPOOLS AND REPLACING THE EMPTY CASES IN A SPINNING MACHINE |
US3835633A (en) * | 1973-04-30 | 1974-09-17 | Zinser Textilmaschinen Gmbh | Gripper for yarn carriers and the like |
DE2845094A1 (en) * | 1978-10-17 | 1980-05-08 | Freudenberg Carl Fa | GRIP DEVICE |
JP3198736B2 (en) * | 1993-07-14 | 2001-08-13 | 東レ株式会社 | Bobbin holding device and bobbin holder |
CN2170956Y (en) * | 1993-10-27 | 1994-07-06 | 蔡克非 | Thin film air cavity type gas pressure device for spinning machine |
CN202000048U (en) * | 2010-12-10 | 2011-10-05 | 经纬纺织机械股份有限公司 | Self-aligning and side-clamping pneumatic pipe grabbing device |
CH711355A1 (en) * | 2015-07-28 | 2017-01-31 | Rieter Ag Maschf | Double door opener. |
-
2018
- 2018-09-27 CH CH01178/18A patent/CH715389A1/en not_active Application Discontinuation
-
2019
- 2019-09-17 EP EP19197839.4A patent/EP3628759A1/en active Pending
- 2019-09-23 KR KR1020190117028A patent/KR20200036758A/en not_active Application Discontinuation
- 2019-09-26 CN CN201910917014.2A patent/CN110952177A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH557777A (en) * | 1972-04-28 | 1975-01-15 | Zinser Textilmaschinen Gmbh | GRIPPING DEVICE. |
DE3214128A1 (en) * | 1982-04-16 | 1983-10-27 | Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt | PNEUMATIC GRIPPER |
EP0303877A1 (en) | 1987-08-18 | 1989-02-22 | Maschinenfabrik Rieter Ag | Device for the replacement of all the cores in a textile machine, in particular in a ring spinning machine |
CN2873813Y (en) | 2006-01-04 | 2007-02-28 | 东台纺织机械有限责任公司 | Yarn holder of spinning frame integral doffer |
CN200992611Y (en) * | 2007-01-05 | 2007-12-19 | 铜陵市松宝机械有限公司 | Bobbin gripper for spinning frame |
WO2016059496A1 (en) | 2014-10-16 | 2016-04-21 | Maschinenfabrik Rieter Ag | Fastening for a doffer gripper |
WO2016071789A1 (en) | 2014-11-03 | 2016-05-12 | Maschinenfabrik Rieter Ag | Doffer gripper having a split housing |
WO2017085588A1 (en) | 2015-11-19 | 2017-05-26 | Maschinenfabrik Rieter Ag | Doffer device having a double gripper for a spinning machine |
Also Published As
Publication number | Publication date |
---|---|
KR20200036758A (en) | 2020-04-07 |
CN110952177A (en) | 2020-04-03 |
CH715389A1 (en) | 2020-03-31 |
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