EP4382465B1 - Winding machine fixing mechanism, winding machine and method for coupling and/or decoupling a bobbin tube to or from a winding spindle of a winding machine - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION

The invention relates to a winding machine that is intended for winding a bobbin made of any material and with any cross-section, in particular a thread-like or ribbon-like bobbin. Furthermore, the invention relates to a winding machine fixing mechanism that serves to fix a bobbin tube on a winding spindle. The bobbin tube can also be designed as a drum tube with limiting disks on the front. Within the scope of the invention, fixing the bobbin tube can only mean axially fixing the bobbin tube on the winding spindle. Alternatively or cumulatively, fixing can include orienting the bobbin tube coaxially to the longitudinal axis of the winding spindle and/or fixing in the circumferential direction for transmitting a drive torque of a driven winding spindle. The invention also relates to a method for rotationally coupling a bobbin tube to a winding spindle of a winding machine and/or for decoupling a bobbin tube from a winding spindle of a winding machine.

STATE OF THE ART

In known winding machines, a bobbin tube is tensioned by means of a lever that is operated manually, electrically, pneumatically or hydraulically. By operating the lever, clamping spring elements can then be pressed against an inner surface of the bobbin tube, which causes the friction required to transfer the drive movement of the driven winding spindle to the bobbin tube. If, at the end of the If the bobbin with the winding wound on the bobbin sleeve is to be removed from the spindle during the winding cycle, the lever is operated in the opposite direction, which releases the bobbin sleeve again.

Out of US 2,623,710 A and the website www.federnfabrikschmid.com/de/ballonfedern it is known to equip spindles with balloon springs that surround the spindle like an elastic cushion. When not loaded, the balloon springs have an outer diameter that is larger than the inner diameter of the coil sleeve. When the coil sleeve is pushed onto the balloon springs, the balloon springs are elastically deformed radially inwards, which causes the pressure of the balloon springs to be applied to the inner surface of the coil sleeve and thus tensions the coil sleeve.

JP 2009 012870 A discloses a winding machine fixing mechanism according to the preamble of claim 1, in which a bobbin tube is tensioned from the inside in the end region facing the winding machine by means of fixing elements. The fixing elements are blades evenly distributed around the circumference of a spindle, which are acted upon radially inwards by rubber rings in a release position. A driver is held on the spindle in a bayonet-like locking mechanism in a release position despite being acted upon by a spring. If the bobbin tube is pushed onto the spindle, the front side of the bobbin tube facing the winding machine comes into contact with a conical surface of the driver. By pressing the bobbin tube and thus the driver against the action of the spring and twisting the bobbin tube with the driver, the bayonet-like locking mechanism of the driver can be released. The spring then presses the driver into the interior of the front side of the bobbin tube facing the winding machine. The blades slide along grooves in the conical surface of the driver, spreading them apart and pressing them against the inner surface of the coil sleeve. In the fixing position created in this way, the coil is secured by friction by the pressing of the blades against the inner surface of the coil sleeve.

US 1 882 950 A discloses a winding machine fixing mechanism in which fixing levers are mounted on a head which has a flange and are evenly distributed around the circumference so as to be pivotable about a pivot axis. An end region of a first lever part of the fixing lever facing away from the flange has a contact element which is designed to be pressed radially outwards as a result of pivoting of the fixing lever against the inner surface of the bobbin tube. The other part of the fixing lever facing the flange has an actuating bevel. If the coil sleeve is pushed onto the actuating bevel, this leads to the pivoting of the fixing lever, whereby the coil sleeve is frictionally engaged with the inner surface on the actuating bevel on the one hand and frictionally engaged with the friction element on the other.

CH 165 476 A discloses a clamping head for a coil sleeve with a conical inner surface. In a fixing position, the conical inner surface of the coil sleeve rests against a corresponding conical outer surface of a support body. The axial relative position between the coil sleeve and the support body is fixed by a tension spring that surrounds a support. When the coil sleeve is pushed onto the support body, the support body moves against the load of a spring supported on the support. During this movement, the front side of the support body pushes the tension spring along a ramp surface of the support, whereby the tension spring is pressed radially outwards against the inner surface of the coil sleeve. Such frictional securing of the axial position of the spool sleeve relative to the support body can be released by manually actuating a sliding bolt protruding from the spool sleeve in the fixing position, which results in the unlocking of locking balls, which causes the release of the frictional connection between the tension spring and the inner surface of the spool sleeve.

According to US 4 375 278 A A coil sleeve is frictionally secured to a pressure sleeve mounted on a spindle so that it can move axially against the action of a spring by radially clamping O-rings with the inner surface of the coil sleeve.

US 10 577 217 B1 discloses a winding machine fixing mechanism in which fixing elements designed as leaf springs are pressed radially outward against an inner surface of a bobbin sleeve by increasing the curvature of these leaf springs in order to secure the bobbin sleeve with friction. The curvature of the leaf springs is increased via a driver which is actuated by an end face of the bobbin sleeve and slides along the inner surface of the bobbin sleeve.

TASK OF THE INVENTION

• der Bauraumverhältnisse und/oder
• der Betriebssicherheit und/oder
• des Aufwandes für das Koppeln einer Spulenhülse mit einer Spulspindel und/oder das Entkoppeln der Spulenhülse von der Spulspindel

verbessert ist.The invention is based on the object of proposing a winding machine fixing mechanism, a winding machine and a method for coupling a bobbin tube to a winding spindle and/or for decoupling a bobbin tube from a winding spindle, which, which or which with regard to

• the installation space conditions and/or
• operational safety and/or
• the effort required to couple a bobbin tube to a winding spindle and/or to decouple the bobbin tube from the winding spindle

is improved.

SOLUTION

The object of the invention is achieved according to the invention with the features of the independent patent claims. Further preferred embodiments according to the invention can be found in the dependent patent claims.

DESCRIPTION OF THE INVENTION

The invention is based on the realization that the use of a lever for fixing and releasing a winding machine fixing mechanism, which is primarily used in the prior art, is disadvantageous because this requires that not only the bobbin tube be pushed onto the winding spindle and the bobbin tube be pulled off the winding spindle (manually, electrically, pneumatically or hydraulically), but also the actuation of the lever. In addition, in order to increase output, the aim is to arrange as many winding machines as possible in a work area of a factory hall of a given size, which means that the winding machines must be arranged as close as possible to one another and/or one above the other. Since the lever is usually arranged in the area of the machine frame, a gap must remain between the spindles and the bobbins wound on them from two adjacent winding machines, through which the lever can be actuated.

• Vorgabe einer Axialstellung der Spulenhülse in zumindest eine Richtung in der Art der Bereitstellung eines Anschlages und/oder
• axiales Spannen der Spulenhülse und/oder
• radiales Spannen der Spulenhülse und/oder
• Vorgabe einer Orientierung der Spulenhülse relativ zu einer Längsachse der Spulspindel.

According to the invention, a winding machine fixing mechanism is proposed with which a bobbin tube can be fixed on a winding spindle. This fixing can alternatively or cumulatively fulfill the following functions within the scope of the invention:

• Specifying an axial position of the coil sleeve in at least one direction in the manner of providing a stop and/or
• axial clamping of the coil sleeve and/or
• radial tensioning of the coil sleeve and/or
• Specifying an orientation of the bobbin tube relative to a longitudinal axis of the winding spindle.

According to the invention, it is proposed that the winding machine fixing mechanism is actuated by means of a motion control. By means of this motion control, the winding machine fixing mechanism according to the invention can be actuated from a release position, in which the bobbin tube can be pushed onto the winding spindle, to a fixing position. The bobbin can then be wound in the fixing position thus achieved. Alternatively or cumulatively, the motion control can be used to actuate the bobbin tube (with the winding wound on it if necessary) from the fixing position to the release position, in which the bobbin tube (if necessary with the winding wound on it) can be pulled off the winding spindle.

According to the invention, during movement control, a driver that causes the winding machine fixing mechanism to be actuated is carried along by the movement of the bobbin tube. In this case, the movement of the bobbin tube is the axial sliding movement of the bobbin tube onto the winding spindle. The driver is thus carried along with at least one axial component, whereby within the scope of the invention the driver can certainly be carried along along any curved path, provided that this curved path has an axial component. It is also possible for the driver to be designed as a pivoted lever that is pivoted with an axial component by the movement of the bobbin tube. Within the scope of the invention, the driver is preferably carried along by the movement of the bobbin tube exclusively in the axial direction, so that the driver is mounted with a linear guide in the direction of the longitudinal axis of the winding spindle, for example so that it can be moved relative to the winding spindle.

• der erforderlichen Kraft zum Aufschieben der Spulenhülse auf die Spulspindel und zum Abziehen der Spulenhülse von der Spulspindel und
• der Spannkraft

vorgegeben ist, die von dem Reibkoeffizienten zwischen der Ballonfeder, dem radialen Übermaß der Ballonfeder gegenüber dem Innendurchmesser der Spulenhülse und der radialen Steifigkeit der streifenförmigen Federelemente der Ballonfeder abhängig ist. Soll für derartige Ballonfedern konstruktiv eine Verdopplung der Spannkraft der Spulenhülse erfolgen, führt dies zu einer Verdopplung der für das Aufschieben und Abziehen erforderlichen Kraft.The design according to the invention is also based on the knowledge that when tensioning the coil sleeve by means of the balloon springs mentioned above, there is a mandatory dependency between

• the force required to push the bobbin tube onto the winding spindle and to pull the bobbin tube off the winding spindle and
• the tension

which depends on the coefficient of friction between the balloon spring, the radial excess of the balloon spring compared to the inner diameter of the coil sleeve and the radial stiffness of the strip-shaped spring elements of the balloon spring. If the tension force of the coil sleeve is to be doubled for such balloon springs, this leads to a doubling of the force required for pushing on and pulling off.

In some cases, this dependency can be resolved according to the invention, in particular by the movement control as a result of the entrainment of the driver by the movement of the bobbin tube and further measures of the winding machine fixing mechanism, which are explained below.

According to the invention, the bobbin tube is fixed on the winding spindle via a fixing device.

For the solution according to the invention, the fixing device has a spreading element and at least one fixing element or several spreading elements with associated fixing elements. In this case, at least one fixing element rests on the spreading element, with contact being made via at least one inclined surface of the spreading element and/or fixing element. A movement of the driver caused by the movement of the bobbin sleeve causes a relative movement between the spreading element and the fixing element, with the relative movement then being guided by the inclined surface. As a result of the inclined surface, the distance of the fixing element from a longitudinal axis of the winding spindle changes with the relative movement. Thus, the fixing element is at a greater distance from the spindle axis in the fixing position than in the release position. It is possible that as a result of this change in distance, the fixing element is pressed radially from the inside onto the bobbin sleeve, whereby a certain elasticity of the fixing element or in the force flow to the fixing element can also be used. to ensure the contact pressure. According to the invention, the fixing element has a fixing section which is arranged behind the bobbin tube in the sliding direction after the winding spindle has been pushed on. In this case, the fixing section is arranged radially on the outside of the inner diameter of the bobbin tube, whereby this fixing section forms an axial stop for the bobbin tube which prevents the bobbin tube from being pulled off the winding spindle. In this case, the loading of the fixing section of the fixing element can also be such that the fixing section exerts an axial force on the winding spindle which can axially clamp it between the driver and the fixing element. It is also possible for this embodiment of the invention that with the spreading element and the at least one fixing element, which are operatively connected to one another via the inclined surface, a type of wedge or cone connection is provided in the fixing position, which ensures a particularly reliable fixation of the coil sleeve, whereby, depending on the choice of the angle of the inclined surface, a type of self-locking of this wedge or cone connection can also be selected and/or a force transmission can be brought about.

While it is fundamentally possible for the fixing device to have only one fixing element, which extends only over a partial circumferential area or extends completely in the circumferential direction and is expanded radially when actuated, the invention proposes for a design of the winding machine fixing mechanism that the fixing device has several fixing elements distributed (evenly or unevenly) over the circumference of the winding spindle. These fixing elements can then be pressed radially inwards against a jacket surface of the winding spindle via a spring device, which can consist of one or more springs, for example a circumferential spring extending closed in the circumferential direction around the fixing elements. The fixing elements can then have inclined surfaces in an end region, which interact with the or a spreading element. Preferably, the at least one spreading element has inclined surfaces, the angle of inclination of which corresponds to the angle of inclination of the inclined surfaces of the fixing elements.

The invention proposes a further proposal in which the driver is supported by an actuating spring. The actuating spring is actuated by a movement of the coil sleeve in a sliding direction by the sliding force exerted by the coil sleeve on the driver. The energy stored in the actuating spring during the sliding can then be used (for an actuating stroke following the sliding stroke) to actuate the fixing device, which then results in the fixing device being released from the release position to the locking position and/or from the locking position to the release position.

For a further proposal of the invention, the flow of force between the driver and the fixing device runs via a link unit. The link unit causes, for example, a change in the distance between the driver, an actuating part or an end face of an actuating sleeve and the previously mentioned spreading element.

For example, a so-called "ballpoint pen mechanism" can be used to design the link unit, which is described under this keyword on a variety of websites that can be found under the keywords "ballpoint pen mechanism", "ballpoint pen mechanism" or "pen exchange". A ballpoint pen mechanism is characterized in particular by the fact that the end actuation button of the ballpoint pen is moved against an actuation spring in a push-up stroke against a spring, which, after the pressure applied to the actuation button has been removed, causes an opposite actuation stroke of the actuation button. By means of this push-up stroke of the push button and this actuation stroke of the push button, the ballpoint pen refill can be extended from an ineffective position inside the ballpoint pen casing, with the extended position being fixed. To retract the ballpoint pen refill, the user's thumb performs another pushing stroke on the actuating button, again applying pressure to the actuating spring, followed by a return movement of the actuating button by the actuating spring in a new actuating stroke. A corresponding mechanism with a fundamentally corresponding interaction between a guide body and a guide can also be used for the winding machine fixing mechanism according to the invention, whereby here, instead of the operator actuating the actuating button, the driver is actuated by pushing the spool sleeve in the pushing direction with the pushing force against the driver, and the movement of the ballpoint pen refill into an extended position and a retracted position corresponds to the movement of a front side of an actuating sleeve between two positions that correspond to the front side of the actuating sleeve from a spreading element at different distances. Any known ballpoint pen mechanism can therefore be used within the scope of the invention.

For one proposal of the invention, the guide unit has a guide and a guide body that moves along the guide. The guide body can be designed as a guide pin, for example, while the guide unit can be designed as a guide sleeve, in which case the guide is a peripheral guide that extends along the circumference of the guide sleeve. The guide pin can then engage in the peripheral guide in the radial direction.

It is possible for the link unit to specify a first axial position of the link body. In this first axial position, the fixing device is in its release position, so that in the first axial position the bobbin tube can be pushed onto the winding spindle or pulled off the winding spindle. The link unit can also specify a second axial position. In the second axial position, the driver is actuated by the bobbin tube, which tensions the loading spring and creates an energy reserve from which the fixing device can be actuated in one actuation stroke. The link unit then also has a third axial position of the link body. In the third axial position, the fixing device is in the fixing position, so that in the third axial position the bobbin tube is fixed, clamped or axially caught on the winding spindle. Finally, the link unit specifies a fourth axial position of the link body. In the fourth axial position (as in the second axial position) the driver is actuated by the coil sleeve under the action of the actuating spring. The energy stored in the actuating spring in this way can then be used to actuate the fixing device in an actuating stroke in such a way that it is returned from the fixing position to the release position.

It is possible that the movement from the first axial position to the second axial position and from the third axial position to the fourth axial position is caused by the movement of the winding spindle in the sliding direction, so that this change in the axial position is brought about manually by the operator or by a device for moving the bobbin tube, possibly with the winding created on it, in the sliding direction. These movements thus create an energy reserve stored in the actuating spring. On the other hand, the movements from the second axial position to the third axial position and from the fourth axial position to the first axial position are caused by the actuating spring, so that the aforementioned energy reserve stored in the actuating spring can be used for these movements.

In the first and third axial positions, the distance between the driver and the expansion element can be greater than in the second and fourth axial positions, which can result in the front surface of an actuating sleeve of the expansion element being larger in the first and third axial positions than in the second and fourth axial positions. Within the scope of the invention, it is possible for the link to be a circumferential link (as previously mentioned as a possibility). In this case, the circumferential link can rotate around the spindle axis during the movement between the different axial positions.

The invention includes a wide range of different options for coupling the driver to the link unit and/or the fixing device. In one proposal, the driver is coupled to the link unit and/or the fixing device via an actuating part, which can have, for example, driver pins, an actuating rod and an actuating sleeve. In this case, a sensor can detect the position and/or movement of the actuating part, so that information on the operating state of the winding machine fixing mechanism can be obtained via the sensor. For example, the sensor can be used to determine whether the winding machine fixing mechanism is in the release position or in the fixing position. The sensor can be an analog or digital sensor that detects the movement of the actuating part in the form of detecting a path and/or a speed of the actuating part. It is also possible for the sensor to be designed as a switch with two or more discrete switching positions, whereby the switching positions can then correlate with the different axial positions or the fixing position and release position.

The actuating part preferably has an actuating rod. The actuating rod can have an end region that extends out of an inner bore of the winding spindle (for all operating positions or only in one operating position or several operating positions). The sensor can then detect the position and/or movement of the end region protruding from the inner bore of the track spindle. The sensor can be arranged in the area of the machine frame, here in particular on the side of the machine frame facing away from the winding and/or the associated front side of the track spindle.

A further solution to the problem underlying the invention is a winding machine which has a winding machine fixing mechanism as previously explained.

Preferably, the driver for the movement control forms a positive connection with the front face of the spool sleeve in the sliding direction. The driver is designed separately from the actuating spring. There is no relative sliding movement between the driver and the spool sleeve during the sliding movement.

A further solution to the problem underlying the invention is a method with which a bobbin tube can be fixed on a winding spindle (preferably in a rotationally fixed manner). For this purpose, the bobbin tube is moved on the winding spindle in a sliding direction, preferably in the direction of the machine frame. The bobbin tube is pressed against the driver with a sliding force in the sliding direction. This results in the driver being (co-)moved in the sliding direction, which takes place under the action of the actuating spring. If the sliding force is then reduced or eliminated, the actuating spring can bring about an actuating stroke in which the actuating spring actuates the fixing device in such a way that it is transferred from the release position to the fixing position.

For an alternative or cumulative solution to the problem underlying the invention, in a method for releasing a bobbin tube on a winding spindle, the bobbin tube is first moved on the winding spindle in a sliding stroke. During this movement, the bobbin tube is pressed against the driver in the sliding direction with a sliding force. As a result of this sliding force, the driver is moved in the sliding direction while the actuating spring is actuated. If the sliding force is then reduced or eliminated, the actuating spring can bring about an actuating stroke in which the actuating spring actuates the fixing device in such a way that it is transferred from the fixing position to the release position.

During the aforementioned methods, the driver (and the coil sleeve adjacent thereto) preferably moves in axial directions oriented opposite to each other during the push-on stroke and the actuating stroke.

Advantageous developments of the invention emerge from the patent claims, the description and the drawings.

BRIEF DESCRIPTION OF THE CHARACTERS

Fig. 1

zeigt schematisch einen Ausschnitt einer Spulmaschine im Bereich eines Spulmaschinen-Fixiermechanismus, wobei sich der Spulmaschinen-Fixiermechanismus in einer Freigabestellung befindet und die Spulenhülse auf die Spindel aufgeschoben wird.

Fig. 2

zeigt in einer abgewickelten Darstellung eine Kulisseneinheit eines Spulmaschinen-Fixiermechanismus der Spulmaschine gemäß Fig. 1, wobei sich ein Kulissenkörper in einer ersten Axialstellung in einer Kulisse befindet.

Fig. 3

zeigt die Spulmaschine entsprechend Figur 1, wobei am Ende des Aufschiebens der Spulenhülse die Spulenhülse unter Beaufschlagung einer Betätigungsfeder einen Mitnehmer mitgenommen hat.

Fig. 4

zeigt in einer abgewickelten Darstellung die Kulisseneinheit des Spulmaschinen-Fixiermechanismus der Spulmaschine gemäß Fig. 1 und 3, wobei sich der Kulissenkörper in einer zweiten Axialstellung der Kulisse befindet.

Fig. 5

zeigt die Spulmaschine gemäß Figuren 1 und 3, wobei die Betätigungsfeder die Fixierstellung des Spulmaschinen-Fixiermechanismus herbeigeführt hat.

Fig. 6

zeigt in einer abgewickelten Darstellung die Kulisseneinheit des Spulmaschinen-Fixiermechanismus der Spulmaschine gemäß Fig. 1, 3 und 5, wobei sich der Kulissenkörper in einer dritten Axialstellung der Kulisse befindet.

Fig. 7

zeigt die Spulmaschine gemäß Figuren 1, 3 und 5, wobei hier zum Überführen des Spulmaschinen-Fixiermechanismus in die Freigabestellung die Spulenhülse mit darauf erstellter Wicklung unter Beaufschlagung der Betätigungsfeder gegen den Mitnehmer gedrückt worden ist und die Betätigungsfeder die Freigabestellung herbeigeführt hat.

Fig. 8

zeigt in einer abgewickelten Darstellung die Kulisseneinheit des Spulmaschinen-Fixiermechanismus der Spulmaschine gemäß Fig. 1, 3, 5 und 7, wobei sich der Kulissenkörper in einer vierten Axialstellung der Kulisse befindet.

Fig. 9

zeigt die Spulmaschine gemäß Figuren 1, 3, 5 und 7 während des Entfernens der Spulspindel mit darauf gewickelter Wicklung von der Spulspindel.

Fig. 10

zeigt in einer abgewickelten Darstellung die Kulisseneinheit des Spulmaschinen-Fixiermechanismus der Spulmaschine gemäß Fig. 1, 3, 5, 7 und 9, wobei sich der Kulissenkörper wieder in der ersten Axialstellung der Kulisse befindet.

In the following, the invention is further explained and described with reference to preferred embodiments shown in the figures.

Fig. 1

shows schematically a section of a winding machine in the area of a winding machine fixing mechanism, whereby the winding machine fixing mechanism is in a release position and the bobbin tube is pushed onto the spindle.

Fig. 2

shows in a developed view a link unit of a winding machine fixing mechanism of the winding machine according to Fig. 1 , wherein a link body is in a first axial position in a link.

Fig. 3

the winding machine shows accordingly Figure 1 , whereby at the end of the sliding on of the coil sleeve, the coil sleeve has taken along a driver under the action of an actuating spring.

Fig. 4

shows in a developed view the link unit of the winding machine fixing mechanism of the winding machine according to Fig. 1 and 3 , whereby the gate body is in a second axial position of the gate.

Fig. 5

shows the winding machine according to Figures 1 and 3 , whereby the actuating spring has brought about the fixing position of the winding machine fixing mechanism.

Fig. 6

shows in a developed view the link unit of the winding machine fixing mechanism of the winding machine according to Fig. 1 , 3 and 5 , whereby the gate body is in a third axial position of the gate.

Fig. 7

shows the winding machine according to Figures 1 , 3 and 5 , whereby in order to transfer the winding machine fixing mechanism into the release position, the bobbin sleeve with the winding created thereon was pressed against the driver under the action of the actuating spring and the actuating spring brought about the release position.

Fig. 8

shows in a developed view the link unit of the winding machine fixing mechanism of the winding machine according to Fig. 1 , 3 , 5 and 7 , whereby the gate body is in a fourth axial position of the gate.

Fig. 9

shows the winding machine according to Figures 1 , 3 , 5 and 7 during removal of the winding spindle with the winding wound on it from the winding spindle.

Fig. 10

shows in a developed view the link unit of the winding machine fixing mechanism of the winding machine according to Fig. 1 , 3 , 5 , 7 and 9 , whereby the gate body is again in the first axial position of the gate.

FIGURE DESCRIPTION

In the figures, some components or parts thereof are identified with the same reference numbers if they correspond or are similar in terms of geometry and/or function. In this case, the components or parts thereof can then be distinguished from one another by the additional letters a, b, .... These components or parts thereof can then be referred to with or without the use of the additional letter, whereby without the use of the additional letter, one of the components or parts, several of the components or parts or all of the components or parts can be addressed.

In the following, the structure of a winding machine is described using Figure 1 explained, whereby the components of the winding machine are primarily in the Figure 1 are marked. However, in the Figures 1 , 3 , 5 , 7 and 9 The winding machine is shown in different operating positions, while the Figures 2 , 4 , 6 , 8 and10 show a link unit of the winding machine for these different operating positions.

Fig. 1 , 3 , 5 , 7 and 9 show a winding machine 1. The winding machine 1 has a machine frame 2. A winding spindle 3 is mounted so that it can rotate relative to the machine frame 2. The winding spindle 3 can be driven by a motor in a manner not shown here for winding the material to be wound. The winding spindle 3 protrudes from the machine frame 2 in the manner of a floating bearing so that a bobbin tube 4 can be pushed onto the winding spindle 3.

In the exit area of the winding spindle 3 from the machine frame 2, a driver 5 is limitedly displaceable on the winding spindle 3, here via a sliding bearing, in the direction of a longitudinal axis 6, which corresponds to the axis of rotation of the winding spindle 3. For the exemplary embodiment shown, the driver 5 is designed as a driver sleeve 7. The driver sleeve 7 has a support surface 8, which is formed here from the front side, in the end region arranged in the machine frame 2. A spring base point of an actuating spring 9 is supported on the support surface 8 of the driver sleeve 7. The other spring base point of the actuating spring 9 is supported on the winding spindle 3, here via an internal bearing ring of a roller bearing of the bearing of the winding spindle 3. The other end region of the driver sleeve 7 forms a contact surface 10 for the spool sleeve 4. For the exemplary embodiment shown, the contact surface 10 is designed as a contact cone 11. Between the end areas, the driver sleeve 7 has, on diametrically opposite sides, elongated holes 12a, 12b that run through in the radial direction and parallel to the longitudinal axis 6. Radially oriented driver pins 13a, 13b are accommodated in the elongated holes 12 and guided in such a way that only one translational degree of freedom in the direction of the longitudinal axis 6 results between the driver pins 13a, 13b and the driver sleeve 7, the length of which is predetermined by the length of the elongated holes 12, while no relative rotation about the longitudinal axis 6 is possible.

The winding spindle 3 has a continuous inner bore 14. An actuating rod 15 extends inside the inner bore 14. The actuating rod 15 protrudes from the winding spindle 3 in the end area of the winding spindle 3 arranged in the machine frame 2, while the other end area ends inside the winding spindle 3 (approximately in the middle). The actuating rod 15 has a transverse bore 16 in which the driving pins 13a, 13b are received and fixed. The driving pins 13a, 13b extend through elongated holes 17a, 17b of the winding spindle 3. The elongated holes 17 are radially continuous through the wall of the winding spindle 3 and run in the direction of the longitudinal axis 6. The driving pins 13 extend through the elongated holes 17 of the winding spindle 3 into the elongated holes 12 of the driving sleeve 7. The driving pins 13 ensure, on the one hand, that the drive movement of the winding spindle 3 (with or without play) is transmitted to the actuating rod 15 on the one hand and to the driving sleeve 7 on the other. The elongated holes 17 enable an axial relative movement of the actuating rod 15 with the driving pins 13 (and thus also the driving sleeve 7) in relation to the winding spindle 3, whereby the movement of the actuating rod 15 in the axial direction is deviated from the axial movement of the driving sleeve 7 by an amount predetermined by the elongated hole 12. may vary.

In the end area facing away from the machine frame 2, the actuating rod 15 has a further transverse bore 18 in which driving pins 19a, 19b are arranged. In this area too, the winding spindle 3 has elongated holes 20a, 20b which are continuous in the radial direction in the wall of the winding spindle 3 and run in the direction of the longitudinal axis 6. The driving pins 19a, 19b extend through these elongated holes 20. The outer end areas of the driving pins 19a, 19b are accommodated in bores 21a, 21b of an actuating sleeve 22 and fixed in these. The actuating sleeve 22 forms a sliding bearing 23 with the outer surface of the winding spindle 3. The driver pins 19 ensure that the rotational movement of the winding spindle 3 is transmitted to the actuating rod 15 and the actuating sleeve 22 with or without play and that the axial movement of the actuating rod 15 corresponds to the axial movement of the actuating sleeve 22. The actuating rod 15, the driver pins 19 and the actuating sleeve 22 have an axial degree of freedom in the direction of the longitudinal axis 6.

In contrast to the previous description, the transmission of the rotary movement can only take place via one of the elongated holes 12, 17, so that there is no double fit.

The actuating sleeve 22 carries a guide body 24. For the embodiment shown, the guide body 24 is designed as a guide pin 25. The guide pin 25 is fixed in a radial bore of the actuating sleeve 22. The guide pin 25 does not protrude beyond the outer surface of the actuating sleeve 22 and extends radially inwards from the actuating sleeve 22.

The link body 24 engages in a link 26. For the illustrated embodiment, the link 26 is designed as a peripheral link 27 of a link sleeve 28.

The link sleeve 28 is mounted on the winding spindle 3 so that it can rotate but has no axial degree of freedom. In the embodiment shown, the winding spindle 3 passes over a shoulder 29 with a reduced cross-section into a bearing surface 30. The link sleeve 28 rests on the shoulder 29 on the side facing the machine frame 2. In the other direction, the link sleeve 28 rests on a locking ring 31 which is received in a groove in the winding spindle 3. The link sleeve 28 is thus caught (in particular with a limited play or a transition fit) between the locking ring 31 and the shoulder 29.

In the free end area, a spreading element 32 is fixed on the winding spindle 3. The spreading element 32 has an inclined surface 33. For the embodiment shown, the spreading element 32 is designed as an expanding sleeve 34, wherein the inclined surface 33 is formed by a truncated cone surface 35.

The actuating sleeve 22 protrudes slightly over the link sleeve 28 in the direction of the spreading element 32. In the space between the spreading element 32 and the end face of the actuating sleeve 22, a number of fixing elements 36 are arranged distributed over the circumference of the winding spindle 3, of which two fixing elements 36a, 36b are shown as examples in the figures. The fixing elements 36 can be roughly designed in the shape of hollow cylinder segments, with the segment angle preferably being less than 90°, less than 70°, less than 60°, less than 50°, less than 40° or less than 30° and/or the wall of the hollow cylinder segments having a longitudinal section which (in particular as shown) deviates from a rectangular longitudinal section. The end face of the actuating sleeve 22 rests against the associated axial end faces of the fixing elements 36, whereby the end face forms an actuating surface 53. In the other end area, the fixing elements 36 have inclined surfaces 37, which can be shaped in accordance with the inclined surfaces 33 of the spreading element 32 and in particular have the same angle of inclination. By means of a spring device 38 surrounding the fixing elements 36, the fixing elements 36 are pressed radially inwards against the outer surface of the winding spindle 3 so that they rest against the outer surface of the winding spindle 3 with a contact surface 39.

Fig. 2 , 4 , 6 , 8 , 10 show a development 40 of the peripheral link 27 of the link sleeve 28. The development 40 in the figures can represent the entire development of the peripheral link 27 for a development or peripheral angle of 360°. Preferably, however, only a development 40 of the peripheral link 27 is shown in the figures over a peripheral angle that is an integer divisor of the peripheral angle of 360°. Several identical developments 40 of this kind according to Figure 6 can thus directly adjoin one another in the circumferential direction. In both cases mentioned, the end regions of the circumferential link 27 in the illustrated development 40 then adjoin one another directly and without jumps or kinks.

As will be explained in more detail below with regard to the mode of operation, a fixing device 41 is formed with the spreading element 32 and the fixing elements 36a, 36b. The gate body 24 and the gate 26 (and possibly also the actuating sleeve 22 and/or the Link sleeve 28) together form a link unit 42. The driver pins 13, 19, the actuating rod 15 and the actuating sleeve 22 form a rigid actuating part 43 which is axially movable relative to the winding spindle 3 and/or the driver sleeve 7, but rotates with the winding spindle 3 and is rotatable relative to the link sleeve 28 and can also execute an axial movement relative to the link sleeve 28.

It is possible that, in deviation from the above explanation, the driving pins 13a, 13b and/or 19a, 19b are formed by a single pin passing through the associated transverse bore 16, 18.

The driver 5, the actuating part 43, the link unit 42 and the fixing device 41 form a winding machine fixing mechanism 44, the functioning of which is explained below.

As can be seen in the development 40 of the circumferential link, the circumferential link has a maximum 45, a minimum 46, a maximum 47 and a minimum 48 with regard to the axial position in the direction of the longitudinal axis 6 and in the direction of actuation of the fixing device 41, which are passed through by the link body 24 in this order. The maxima 45, 47 preferably specify the same axial position of the link body 24. In contrast, the minimum 46 is arranged less far in the axial direction for actuation of the fixing device 41 than the minimum 48, so that the minimum 48 is an absolute minimum. In the context of the present patent application, the minimum 46 is referred to as the first axial position 49, the maximum 47 as the second axial position 50, the minimum 48 as the third axial position 51 and the maximum 45 as the fourth axial position 52.

The operation of the winder fixing mechanism 44 is explained below.

In Figures 1 and 2 the winding machine fixing mechanism 44 is in the release position in which the actuating part 43 is at the greatest distance from the spreading element 32. This has the consequence that the actuating surface 53, which is formed by the end face of the actuating sleeve 22 facing the spreading element 32, has a maximum distance from the spreading element 32. This in turn has the consequence that the fixing elements 36 can slide radially inwards along the inclined surface 33 of the spreading element 32 as a result of the action by the spring device 38, which is accompanied by an axial sliding movement of the fixing elements 36 along the contact surface 39 and/or a pivoting of the fixing elements 36 about the contact surface 39. In the release position, a fixing section 54 is arranged at such a small distance from the longitudinal axis 6 that the spool sleeve 4 can pass through the fixing sections 54 without contact. In this release position, the guide body 24 is held in the first axial position 49 by the actuating spring 9 (if necessary after overcoming any play as a result of the elongated hole 12), in that the actuating spring 9 presses the guide body 24 against the recess in the correspondingly shaped boundary of the peripheral guide 27. In the release position, the spool sleeve 4 can thus initially be pushed without resistance in a pushing direction 55 onto the winding spindle 3, onto the guide unit and the fixing device 41.

At the end of the pushing on, a front side 56 of the coil sleeve 4 comes to rest on the contact surface 10 of the driver 5. If a pushing force 57 is then applied to the coil sleeve 4, a driving movement of the driver 5 takes place, increasing the load on the actuating spring 9. The movement of the driver 5 is transferred (if necessary after overcoming any play in the slot 12) via the driver pins 13 to the actuating part 43 and thus to the guide body 24. This has the result that the guide body 24 in the peripheral guide 27 moves from the first axial position 49 according to Figure 2 into the second axial position 50 according to Figure 4 can move. Figures 3 and 4 show the second axial position 50 brought about at the end by applying the pushing force 57, which can therefore also be referred to as the pushing position. In the second axial position 50, the operating position of the fixing device 41 is still the release position.

If the pushing force 57 is then reduced or eliminated, the actuating spring 9 can bring about the fixing position of the winding machine fixing mechanism 44, which in Figures 5 and 6 is shown. To do this, the actuating spring 9 presses the driver 5 and thus the actuating part 43 in the direction of the spreading element 32. This results in the link body 24 being moved in the peripheral link 27 from the second axial position 50 into the third axial position 51. In the third axial position, the distance of the actuating surface 53 of the actuating sleeve 22 from the spreading element 32 is minimal. This results in the actuating force of the actuating spring 9, which is exerted by the actuating surface 53 on the fixing elements 36, causing the fixing section 54 with its inclined surface 37, the angle of inclination of which is adapted to the angle of inclination of the inclined surface 33 of the spreading element 32, to slide upwards along the inclined surface 33 of the spreading element 32, whereby the distance of the fixing section 54 from the Longitudinal axis 6 is increased. This movement can be accompanied by an axial sliding movement in the area of the contact surface 39 and/or a pivoting of the fixing elements 36 around the contact surface 39. In the fixing position according to Figure 5 the end region of the fixing section 54 is at a distance from the longitudinal axis 6 that is greater than the inner diameter of the coil sleeve 4. This in turn means that the coil sleeve 4 is axially caught on the one hand between the contact surface 10 of the driver 5 and on the other hand the inclined surface 33 of the expansion element 32 and is thus axially fixed. On the other hand, the fixing section 54 also exerts a radially outwardly oriented force on the edge region of the coil sleeve 4, which can lead to a tensioning of the coil sleeve 4 from the inside, which can ensure further fixation or securing.

In the fixing position of the winding machine fixing mechanism 44 according to Figures 5 and 6 A winding 59 is then created on the coil sleeve 4.

If the bobbin tube 4 with the winding 59 is to be removed from the winding spindle 3 at the end of the winding cycle, the winding machine fixing mechanism 44 must first be transferred to the position shown in Figure 7 and 8 shown sliding position can be brought about. For this purpose, a sliding force 60 is applied to the coil sleeve 4 and/or the winding 59, which results in a movement of the driver 5 with an increase in the load on the actuating spring 9. This movement of the driver 5 is transmitted via the driver pins 13 to the actuating part 43 and thus also to the guide body 24, so that a transfer of the guide body 24 from the third axial position 51 according to Figure 6 into the fourth axial position 52 according to Figure 8 During this sliding movement, the distance between the actuating surface 53 of the actuating sleeve 22 and the expansion element 32 increases, whereby the fixing elements 36 can again slide radially inwards along the inclined surface 33 of the expansion element 32 until Figure 7 In the release position shown, the fixing sections 54 again have a radial distance from the longitudinal axis 6 which is smaller than the inner radius of the coil sleeve 4.

In this state, the pushing force 60 is eliminated and with a movement of the bobbin sleeve 4 in a pulling direction 61, the bobbin sleeve 4 with the winding 59 arranged thereon can be pulled down from the winding spindle 3 ( Fig. 9 ). As a result of the removal of the pushing force 60, the actuating spring 9 can move the guide body 24 in the peripheral guide 27 from the fourth axial position 52 according to Figure 8 into the first axial position 49 according to Figure 10 move.

The movement of the link body 24 along the peripheral link 27 is (in addition to the change in the axial position between the first axial position 49, the second axial position 50, the third axial position 51, the fourth axial position 52 and again the first axial position 49) associated with a rotary movement of the link sleeve 28 relative to the winding spindle 3 on the one hand and to the actuating sleeve 22 on the other hand around the longitudinal axis 6, for which a corresponding sliding bearing is provided. The extent of the rotary movement depends on the angle of inclination or the slope of the boundaries of the peripheral link 27.

As an optional special feature, an end region 62 of the actuating rod 15 protrudes from the end region of the winding spindle 3 mounted in the machine frame 2. In this case, a distance 63 by which the end region 62 protrudes from the winding spindle 3 depends on the operating position of the winding machine fixing mechanism 44:
In the release position according to Figures 1 and 2 and 9 and 10, i.e. in the first axial position 49, the end region 62 protrudes from the winding spindle 3 by a distance 63 of the amount X. In the push-on positions, i.e. the second axial position 50 and fourth axial position 52 according to Figures 3 and 4 as well as Figures 7 and 8 , the end region 62 protrudes from the winding spindle 3 at a distance 63 by an amount Y. Finally, in the fixing position according to Figures 5 and 6 , i.e. in the third axial position 51, the end region 52 extends out of the winding spindle 3 at a distance 63 by an amount Z. In this case, Z > X > Y applies.

A bobbin tube 4 is fixed on the winding spindle 3 by means of the winding machine fixing mechanism 44 by means of a pushing stroke, for which a pushing force 57 is applied to the bobbin tube 4 and the bobbin tube 4 is moved in the direction of the driver 5, and with an actuating stroke in which (with the pushing force 57 removed) an opposite movement is brought about by the actuating spring 9 and the fixing device 41 is transferred from the release position to the fixing position.

Transferring the winding machine fixing mechanism 44 from the fixing position to the release position for removing the bobbin tube 4 with the winding 59 from the winding spindle 3 requires a pushing stroke in which a pushing force 60 is applied to the bobbin tube 4 and/or the winding 59 and the bobbin tube 4 is moved in the direction of the driver 5, as well as a subsequent actuating stroke after the pushing force 60 has been removed, in which the fixing device 41 is transferred to the release position by the actuating spring 9.

Both the transfer of the winding machine fixing mechanism 44 into the fixing position and the actuation of the winding machine fixing mechanism 44 into the release position are thus carried out by the actuating spring 9, wherein the different directions of the action of the actuating spring 9 with respect to the winding machine fixing mechanism 44 are predetermined by the design of the circumferential link 27.

The different distances 63 can be detected by means of a sensor 64, which can detect the path or the speed of the end region 62. It is possible for the sensor to detect the distance 63 continuously, in stages or digitally. It is also possible for the sensor 64 to be a switch with at least 2 switch positions, which is switched to reach the predetermined distances 63, in particular the distances X, Y, Z.

As in Figure 1 As can be seen, the winding spindle 3 with the driver 5 emerges from the machine frame 2 through an opening 65. The space between the winding spindle 3 and the driver 5 and the boundary of the opening 65 can be closed by a cover or seal 66. The cover or seal 66 can, on the one hand, keep dirt particles away from the machine frame 2 and the interior with the bearing for the winding spindle 3. Furthermore, it can be prevented that actuating elements or even fingers of an operator's hand can enter this space. In the simplest case, the cover or seal 66 can be designed in the form of a plate, possibly with a gap seal or labyrinth seal opposite the outer surface of the driver 5. The cover or seal 66 is preferably caught between expanded end regions of the driver 5, on the one hand for providing the support surface 8 and on the other hand for providing the contact surface 10. In this case, the cover or seal 66 can be designed to be split.

The accommodation of the driver pins 13 in elongated holes 12 of the driver sleeve 7 ensures a limited degree of freedom or play, which can be used to compensate for differences in the length of the coil sleeves 4. Such differences in length can be due to manufacturing tolerances or can arise from wear, for example.

REFERENCE SYMBOL LIST

1

Dishwasher

2

machine frame

3

winding spindle

4

spool sleeve

5

driver

6

longitudinal axis of the winding spindle

7

drive sleeve

8

support surface

9

actuating spring

10

contact surface

11

contact cone

12

slot of the drive sleeve

13

drive pin

14

inner bore of the winding spindle

15

operating rod

16

cross-drilling

17

slot of the winding spindle

18

cross-drilling

19

drive pin

20

slot

21

drilling

22

actuating sleeve

23

plain bearing

24

backdrop body

25

scenery pin

26

backdrop

27

peripheral backdrop

28

guide sleeve

29

Paragraph

30

storage space

31

retaining ring

32

expansion element

33

inclined surface

34

expansion sleeve

35

conical surface

36

fixing element

37

inclined surface

38

spring device

39

contact surface

40

processing

41

fixing device

42

backdrop unit

43

operating part

44

winder fixing mechanism

45

maximum

46

minimum

47

maximum

48

minimum

49

first axial position

50

second axial position

51

third axial position

52

fourth axial position

53

actuation surface

54

fixing section

55

sliding direction

56

front side

57

procrastination force

59

winding

60

procrastination force

61

trigger direction

62

end area

63

Distance

64

sensor

65

opening

66

cover or seal

Claims (9)

1. Winding machine fixing mechanism (44) for fixing a winding sleeve (4) on a winding spindle (3), wherein

   a) the winding machine fixing mechanism (44)

   aa) can be actuated from a release position to a fixing position and/or

   ab) can be actuated from a fixing position to a release position, by a motion control

   b) the winding sleeve (4) is fixed on the winding spindle (3) by a fixing device (41) and

   c) during the motion control, a catch (5) causing the actuation of the winding machine fixing mechanism (44) is entrained by the movement of the winding sleeve (4), the fixing device (41) comprises at least one spreading element (32) and at least one fixing element (36) and the spreading element (32) and the fixing element (36) bear against one another via at least one slanted surface (33, 37) and a movement of the catch (5) causes a relative movement guided by the slanted surface (33, 37) between the spreading element (32) and the fixing element (36), with which the distance of the fixing element (36) from a longitudinal axis (6) of the winding spindle (3) changes,
   characterized in that

   d) the fixing element (36) comprises a fixing section (54) that, after the winding sleeve (4) has been slid on, is arranged behind the winding sleeve (4) in the direction for sliding on, wherein the fixing section (54) is arranged radially outside of the inner diameter of the winding sleeve (4) and this fixing section (54) forms an axial stop for the winding sleeve (4) that hinders the withdrawal of the winding sleeve (4) from the winding spindle (3).
2. Winding machine fixing mechanism (44) according to claim 1, characterized in that, in the fixing position

   a) an end region of the winding sleeve (4) is supported on the catch (5) in one axial direction and

   b) the other end region of the winding sleeve (4) is supported on the fixing device (41) in the other axial direction.
3. Winding machine fixing mechanism (44) according to claim 1 or 2, characterized in that the fixing device (41) comprises multiple fixing elements (36a, 36b) distributed over the circumference of the winding spindle (3), pressed radially inwards against an outer surface of the winding spindle (3) by a spring device (38) and comprising slanted surfaces (37) in an end region that interact with the or a spreading element (32).
4. Winding machine fixing mechanism (44) according to one of the preceding claims, characterized in that the catch (5) is supported by an actuating spring (9) that is biased by a movement of the winding sleeve (4) in a direction for sliding on (55) by the force for sliding on (57, 60) exerted by the winding sleeve (4) on the catch (5) and that actuates the fixing device (41).
5. Winding machine fixing mechanism (44) according to one of the preceding claims, characterized in that a motion link unit (42) is arranged in the force flow between the catch (5) and the fixing device (41) that preferably comprises a ballpen motion link.
6. Winding machine fixing mechanism (44) according to claim 5, characterized in that the motion link unit (42) comprises a motion link (26) and a motion link body (24) moving along the motion link (26), wherein the motion link unit (42)

   - defines a first axial position (49) of the motion link body (24), in which the fixing device (41) is in the release position and in which the winding sleeve (4) can be moved onto the winding spindle (3) and can be moved by the winding spindle (3),

   - defines a second axial position (50) of the motion link body (24), in which the catch (5) is entrained by the winding sleeve (4),

   - defines a third axial position (51) of the motion link body (24), in which the fixing device (41) is in the fixing position, and

   - defines a fourth axial position (52) of the motion link body (24), in which the catch (5) is entrained by the winding sleeve (4),

   wherein in particular

   a) the movements from the first axial position (49) into the second axial position (50) and from the third axial position (51) into the fourth axial position (52) are caused by the movement of the winding spindle (4) in the direction for sliding on (55) and the movements from the second axial position (50) into the third axial position (51) and from the fourth axial position (52) into the first axial position (49) are caused by the actuating spring (9) and/or

   b) in the first and third axial positions (49, 51), a distance of the catch (5) from the spreading element (32) is larger than in the second and fourth axial positions (50, 52) and/or

   c) the motion link (26) is a circumferential motion link (27) and a rotation of the circumferential motion link (27) takes place during the movements between the axial positions.
7. Winding machine fixing mechanism (44) according to claim 5 or 6, characterized in that the catch (5) is coupled to the motion link unit (42) and/or fixing device (41) by an actuating part (43) and a sensor (64) senses the position and/or movement of the actuating part (43), wherein preferably the actuating part (43) comprises an actuating rod (15) that comprises an end region (62) that extends at least temporarily out of an inner bore (14) of the winding spindle (3), wherein the sensor (64) senses the position and/or movement of the end region projecting from the inner bore (14) of the winding spindle (3).
8. Winding machine (1) comprising a winding machine fixing mechanism (44) according to one of the preceding claims.
9. Method for fixing and/or releasing a winding sleeve (4) on a winding spindle (3) of a winding machine (1) comprising a winding machine fixing mechanism (44) of one of claims 4 to 7, characterized by the following method steps:

   a) fixing the winding sleeve (4) on the winding spindle (3) by

   aa) moving the winding sleeve (4) on the winding spindle (3) in a sliding on stroke, wherein the winding sleeve (4) is pressed against the catch (5) with a force for sliding on (57) in the direction for sliding on (55), whereby the catch (5) is moved in the direction for sliding on (55) by applying bias onto the actuating spring (9), and

   ab) reduction or elimination of the force for sliding on (57), whereby the actuating spring (9) causes an actuating stroke in which the actuating spring (9) transfers the fixing device (41) from the release position to the fixing position,

   and/or

   b) release of the winding sleeve (4) from the winding spindle (3) by

   ba) moving the winding sleeve (4) on the winding spindle (3) in a sliding on stroke, wherein the winding sleeve (4) is pressed against the catch (5) with a force for sliding on (60) in the direction for sliding on (55), whereby the catch (5) is moved in the direction for sliding on (55) by applying bias onto the actuating spring (9), and

   bb) reduction or elimination of the force for sliding on (60), whereby the actuating spring (9) causes an actuating stroke in which the actuating spring (9) transfers the fixing device (41) from the fixing position to the release position.

Images