JP7525994B2 - Spinning cup receiving unit and winding machine - Google Patents

Description

The present invention relates to a winding machine and a spinning cop receiving unit for a winding machine,
a spinning cop holder provided with a pin designed to receive the spinning cop coaxially;
a positioning device with a clamping element of a clamping unit which can engage with the spinning cop in the unwinding position;
There is a system in place,
The spinning cop holder in this case relates to a winding machine and to a spinning cop receiving unit for a winding machine, which can come into contact with the end face of the spinning cop at a guide surface adjacent to the pin.

In the winding unit of an automatic winding machine, a yarn supply bobbin, for example a spinning cop with a relatively small yarn volume produced in a ring spinning machine, is rewound into a large-volume twill package. The spinning cop is mounted vertically on a pin of a spinning cop holder that protrudes vertically from the base and is transported to the winding unit of the winding machine via a transport system for the spinning cop holder.

During the rewinding process, when the yarn is pulled through the head of the spinning cop in approximately the axial direction of the spinning cop while forming a so-called yarn balloon, the yarn is subjected to tension forces which ultimately limit the yarn withdrawal speed and thus the winding speed of the winding machine. With a decrease in the diameter of the yarn layer in the spinning cop, the entire spinning cop becomes smaller and lighter, and the tension forces on the yarn that are then pulled upwards also act to pull the spinning cop upwards, which can eventually cause the spinning cop to be pulled out of the pin of the spinning cop holder. In order to prevent the spinning cop from being detached from the spinning cop holder, for example due to the yarn getting stuck during winding, it is known to clamp the spinning cop in the unwinding position, where the spinning cop is clamped radially below the yarn layer. From DE 42 36 038 A1 it is known, for example, to approach the cup base from the outside with a clamping element, which allows the spinning cop to be fixed on the pin of the spinning cop holder when an upwardly directed vertical force is applied.

However, clamping the spinning cop base radially does not guarantee that the central axis of the spinning cop is defined and oriented vertically and that the tip of the spinning cop facing away from the spinning cop holder is thus correctly positioned. Due to the dynamics of the spinning cop when the spinning cop holder is introduced into the unwinding position in the winding machine and/or due to misalignment of the clamping elements, the spinning cop can be clamped at an angle. The resulting misorientation of the spinning cop significantly increases the risk of yarn breakage, especially when so-called unwinding accelerators are used in the winding machine.

Therefore, a first aspect of the present invention relates to a spinning cup accommodation unit for a winding machine, which comprises a spinning cup holder with a pin formed to accommodate the spinning cup coaxially, and a positioning device with a clamping element of a clamping unit that can engage with the spinning cup in the unwinding position, whereby the spinning cup holder can contact the end face of the spinning cup with a guide surface adjacent to the pin.

The proposed spinning cup receiving unit is distinguished by the fact that the clamping unit is configured such that the clamping element applies a clamping force which acts along the longitudinal axis of the pin in the pay-out position and which is transferable to the spinning cup, and which presses the end face of the spinning cup against the guide surface of the spinning cup holder.

To transport the spinning cops to their unwinding position in the winding machine, the spinning cops are respectively attached to the pins of the spinning cop holder, which are then moved to the unwinding position by means of the transport system. For fixing and orienting the spinning cops in the spinning cop holder, according to the invention, the clamping unit of the spinning cop receiving unit has a clamping element which can engage with the spinning cup arranged in the spinning cop holder in its unwinding position and transmits to the spinning cop a force which is directed in the longitudinal direction of the pin towards the spinning cop holder. By the pressing force generated by the clamping element, the end face of the spinning cop is pressed against the guide surface of the spinning cup holder, so that a reliable orientation of the spinning cop in the spinning cop holder is achieved by the orientation of the guide surface and the end face.

Due to the matched configuration of the guide surfaces and the end surfaces, the spinning cop can thus be oriented in a particularly reliable manner, particularly preferably perpendicular to the bottom surface of the spinning cop holder, which itself is supported, for example, via the base plate of the machine stand of the winding machine. In order to ensure reliable yarn withdrawal from the spinning cop, the force component of the clamping element acting in the axial direction of the pin is then no greater than the static friction force between the clamping element and the spinning cop.

Overall, the configuration of the spinning cup receiving unit according to the invention thus ensures a precise and reliable orientation of the spinning cup relative to the spinning cup holder during the entire unwinding process, thereby ensuring uninterrupted operation of the winding machine.

The interaction between the clamping element and the spinning cup in the unwinding position of the clamping element can in principle take place at any position of the spinning cup, as long as unimpeded unwinding of the yarn from the spinning cup during the unwinding process is guaranteed. However, according to a particularly preferred embodiment of the invention, it is proposed that the clamping element can contact the free peripheral surface of the spinning cup in the area between the head cone and the spinning cup holder. This embodiment of the invention ensures a particularly reliable pressing of the spinning cup via the end surface against the guide surface, and at the same time, via a suitable material pair, it can be ensured that free rotation of the spinning cup in the spinning cup holder can take place even when large force components act in the axial direction. This preferred embodiment of the invention, in which the clamping element is arranged in the area outside the yarn run, particularly reliably ensures that the yarn run is not influenced by the clamping element.

The configuration of the guide surfaces and end surfaces, as well as the orientation of the guide surfaces and end surfaces, can be carried out in basically any manner in order to obtain the desired orientation of the spinning cop in the spinning cop holder, where it is usually desirable to obtain an orientation in which the spinning cop extends perpendicularly to the spinning cop holder. In a particularly preferred embodiment of the invention, it is proposed that the guide surfaces and end surfaces are configured in such a way that the spinning cop is oriented perpendicularly to the bottom surface of the base plate of the spinning cop holder in the pay-out position.

A corresponding configuration allows a particularly trouble-free winding process, with the orientation of the spinning cop perpendicular to the bottom surface being achieved in particular by the end faces and the guide surfaces being oriented parallel to the bottom surface. This configuration allows the spinning cop holder and the spinning cop to be manufactured particularly simply and inexpensively and ensures to a particular extent that the spinning cop in the unwinding position extends perpendicular to the base surface on which the spinning cop holder is supported via its bottom surface.

The configuration of the clamping unit with the clamping elements can basically be freely selected, including the contact surface of the clamping elements on the spinning cop, preferably the free circumferential surface of the spinning cop, and the type of movement of the clamping elements from the release position to the pay-out position. According to a particularly preferred configuration of the invention, however, the clamping unit has a plurality of, preferably four, particularly preferably three, in particular two clamping elements, which in the pay-out position are evenly spaced apart from one another over the circumference of the circumferential surface and can contact the circumferential surface.

The use of two or more clamping elements in this case makes it possible to center the spinning cop exactly in its central position under the winding unit. Furthermore, at least two clamping elements allow an equal-shaped opening movement on both sides, which allows for a simple adaptation of the central position for a wide variety of cop diameters. Furthermore, the evenly distributed arrangement of the clamping elements over the entire circumference ensures an even clamping force and thus an even contact of the end faces at the contact surfaces.

In principle, any device can be used to generate the clamping force that is transferred from the clamping element to the spinning cop. For example, a screw device is conceivable for this purpose, with which the clamping element can be moved in the direction of the spinning cop. However, according to a particularly preferred embodiment of the invention, it is proposed that the clamping unit has a preloading element, in particular a spring element, which presses the clamping element against the circumferential surface in the pay-out position.

It is proposed that the use of a preloading element, in particular a spring element, allows the clamping force to be adapted in a convenient manner very precisely to the desired clamping force, with the return spring force ensuring that the clamping force does not exceed a preset value. In a particularly preferred embodiment of the invention, the preloading element, in particular the spring element, is adjustable, which allows for a simple adaptation of the spinning cup receiving unit to different operating conditions, for example different spinning cups. If a compression spring is used as the preloading element, the clamping force acting on the spinning cup can be determined in a simple manner, for example by means of an adjustable preload length.

The transfer of the axial pressure force from the clamping element to the spinning cop can be carried out in principle in any way, for example by a suitable design of the contact surface of the clamping element with the circumferential surface of the spinning cop, in which case the clamping element generates a pressure force in the unwinding position which acts in the axial direction towards the spinning cop holder. It is also conceivable, for example, for the circumferential surface to be shaped in such a way that, when the contact element at the contact surface of the clamping element cooperates with the contact element, a corresponding pressure force is generated in the unwinding position.

However, according to a particularly preferred embodiment of the invention, it is proposed that the clamping element or elements are oriented obliquely to the guide surface so that the contact surface of the clamping element is moved towards the base plate when moving to the unwinding position. According to this embodiment of the invention, the clamping element or elements are oriented towards the circumference of the spinning cop or towards the spinning cop holder so that they or they move in a path of movement between the release position and the unwinding position which runs obliquely to the longitudinal axis of the pin, so that the movement of the clamping element when moving towards the unwinding position forms a movement component in the longitudinal direction towards the spinning cop holder, so that in the unwinding position the spinning cop is pressed with its end surface against the guide surface of the spinning cop holder. This embodiment of the invention makes it possible to generate an axially acting force component in a particularly simple manner.

The contact surface of the clamping element, with which the clamping element contacts the spinning cop, preferably with the circumferential surface of the spinning cop, can be configured in principle in any manner. For example, it is possible to form the contact surface in such a way that it contacts the circumferential surface in a planar or linear manner. According to a particularly preferred embodiment of the invention, it is proposed that the contact surface has two or more contact points and is configured in particular in a prismatic manner. This embodiment of the invention allows a particularly reliable centering of the spinning cop on the spinning cop holder. Furthermore, when the spinning cop is securely locked, an unimpeded unwinding of the yarn from the spinning cop is achieved.

According to a further embodiment of the invention, it is proposed that the clamping unit is configured such that the pay-out position of the clamping elements is adjustable and/or the clamping elements can be moved independently of one another to the pay-out position. This embodiment of the invention makes it possible to generate a central position of the spinning cop in the spinning cop holder in a particularly reliable and simple manner via one or more clamping elements. At the same time, the movements occurring independently of one another allow a quick and simple movement of the clamping elements to a release position, in which the empty spinning cop can be removed from the spinning cop holder and a full spinning cop can be placed in the spinning cop holder.

The second aspect of the present invention relates to a winding unit of a winding machine, the winding unit having a spinning cop storage unit for positioning the spinning cop at the payout position.

The proposed winding unit is distinguished by the fact that the spinning cop receiving unit is configured in one or more of the configurations described above.

Such a winding unit ensures that a correctly oriented spinning cop is prepared in a particularly reliable manner in the winding machine. Yarn breakage due to tilted spinning cops is avoided in a particularly advantageous manner by the winding unit according to the invention. What is important here is that at least one clamping element of the clamping unit of the spinning cop receiving unit can engage the spinning cop arranged on the pin of the spinning cop holder in such a way that the end face of the spinning cop is pressed against the guide surface of the spinning cop holder by a force component acting axially in the direction of the pin. This achieves a reliable orientation of the spinning cop in the winding unit by the orientation of the end face and the guide surface.

Next, two embodiments of the present invention will be described with reference to the drawings.

2 shows a schematic view of a spinning cop arranged on a spinning cop holder with a first embodiment of a clamping unit; FIG. 3 shows a schematic view of a spinning cop arranged on a spinning cop holder with a second embodiment of the clamping unit; FIG.

Figures 1 and 2 show in schematic form the spinning cop receiving unit 1 of a winding unit of a winding machine, the rest of which is not shown here.

The spinning cup receiving unit 1 has a spinning cup holder 3, which can be moved to a pay-out position in the winding unit via a transport system of the winding machine, not shown here. To receive the spinning cup 2, a pin 11 serves, which protrudes from a platform 9 connected to the base plate 8 of the spinning cup holder 3 and on which the spinning cup 2 is attached. During operation, the spinning cup holder 3 is supported in the winding unit via the bottom surface 12 of the spinning cup holder 3 on the machine frame of the winding machine.

For the orientation of the spinning cup 2 in the spinning cup holder 3, the spinning cup receiving unit 1 has a clamping unit 4, which has two clamping elements 5 that are in contact with the circumferential surface 10 of the spinning cup 2 so as to be located opposite each other. The clamping elements 5, which are shown in the pay-out position in Figs. 1 and 2 and which in this pay-out position are in contact with the circumferential surface 10 of the spinning cup 2 with their contact surface, generate a force component acting along the axial direction of the pin 11, by which the spinning cup 2 is pressed against the guide surface 6 of the base 9 of the spinning cup holder 3 via the end surface 7. The axially acting force component thus ensures a reliable axial orientation of the spinning cup 2, with the end surface 7 and the guide surface 6 being oriented parallel to the bottom surface 12, so that the spinning cup 2 extends perpendicular to the bottom surface 12 of the spinning cup holder 3.

In the embodiment shown in FIG. 1, the force component acting in the axial direction on the spinning cop holder 3 is generated by a corresponding configuration of the contact surface of the clamping element 5 in contact with the circumferential surface 10. In the embodiment shown in FIG. 2 of the clamping unit 4, the clamping element 5, due to its tilted orientation, transmits an axial force to the spinning cop 2 due to an axial movement component when moving from a release position, not shown here, to the pay-out position shown in FIG. 2.

REFERENCE SIGNS LIST 1 spinning cop receiving unit 2 spinning cop 3 spinning cop holder 4a, 4b clamping unit 5 clamping element 6 guide surface 7 end surface 8 base plate 9 base 10 peripheral surface 11 pin 12 bottom surface

Claims (11)

A spinning cop receiving unit for a winding machine, comprising:
a spinning cop holder provided with a pin designed to receive the spinning cop coaxially;
a positioning device with a clamping element of a clamping unit which can engage with said spinning cop in the unwinding position;
There is a system in place,
The spinning cup holder is capable of contacting an end face of the spinning cup at a guide surface adjacent to the pin,
The clamping unit (4) is configured such that, in the pay-out position, the clamping element (5) applies a clamping force transmittable to the spinning cop (2) acting along the longitudinal axis of the pin (11), which clamps the end face (7) against the guide surface (6). the clamping element (5) is capable of contacting the free peripheral surface (10) of the spinning cop (2) in the area between the head cone and the spinning cop holder (3),
The spinning cop storage unit according to claim 1. the guide surface (6) and the end surface (7) are configured such that the spinning cop (2) is oriented perpendicularly to a bottom surface (12) of a base plate (8) of the spinning cop holder (3) in the unwinding position.
3. The spinning cop storage unit according to claim 1 or 2. The end surface (7) and the guide surface (6) are oriented parallel to the bottom surface (12).
The spinning cop storage unit according to claim 3 . the clamping unit (4) has a plurality of clamping elements (5) which, in the extended position, are evenly distributed around the circumference of the peripheral surface (10) and can contact the peripheral surface (10);
The spinning cop storage unit according to claim 2 . the clamping unit (4) has a preload element, in particular a spring element, which presses the clamping element (5) against the peripheral surface (10) in the extended position,
6. A spinning cop storage unit according to claim 2 or 5 . The preload element, in particular the spring element, is adjustable.
The spinning cop storage unit according to claim 6 . the clamping element (5) is oriented obliquely with respect to the guide surface (6) such that a contact surface of the clamping element is moved towards the base plate (8) upon movement to the payout position.
The spinning cop storage unit according to claim 3 . The contact surface has two or more contact points and is in particular prismatic in shape.
The spinning cop storage unit according to claim 8 . the clamping unit (4) is configured such that the extended positions of the clamping elements (5) are adjustable and/or the clamping elements (5) are movable to the extended positions independently of one another,
10. The spinning cop receiving unit according to claim 1. A winding unit of a winding machine, comprising a spinning cop receiving unit for positioning a spinning cop in a pay-off position,
11. A winding unit, characterized in that the spinning cop receiving unit (1) is constructed as claimed in any one of claims 1 to 10.