JP2006522230A - Clamping unit for combing machine - Google Patents

Abstract

The invention is a clamping unit (1) of a combing machine, comprising a clamping frame (8) having a lower clamping plate (12), the clamping frame (8) being driven elements (10, 10). G) a circular comb which can be reciprocated via at least one swivel arm (2a) and is pivotally supported on the machine frame (MG) below the clamping unit (1) The present invention relates to a type supported so as to be pivotable about the axis (5) of (4). In order to simplify the driving device of the clamping unit of the combing machine and to keep the distance (a) between the envelope circle of the comb segment (7) and the clamp lip (13) constant, a circular comb shaft (5 It is proposed that the free end portion of the swivel arm (2a) supported so as to be swivelable around the movement frame is fixedly coupled to the clamping frame (8).

Description

  The invention relates to a clamping unit for a combing machine, comprising a clamping frame with a lower clamping plate, which can be reciprocated by a drive element via at least one pivot arm. Further, the present invention relates to a type in which the swivel arm is pivotally supported around the axis of a circular comb that is rotatably supported on a machine frame below the clamping unit.

  DE-4216485 discloses a clamping unit that reciprocates via a swivel arm. In this case, the swivel arm coupled to the clamping frame for rotational movement forms a four-bar link transmission. As a result, the clamping pin grip of the lower clamping plate moves away from the envelope of the circular comb segment when the clamping unit moves in the direction of the tearing cylinder, and this envelope is returned again when returning to the rear position. Will approach. In the rear position, the clamping unit is closed, with fibers protruding beyond the clamp pin grip being provided to the circular comb segment for combing. The circular comb for squeezing out the protruding fibers is already during the return movement of the clamping unit, as can be seen from the course diagram of the document “Die Kurzstapelspinnerei-The Textile Institute”, volume 3-ISDN3-908.059-01-1. Is in an engaged state. As a result of this, the penetration depth of the circular comb segment into the protruding fibers provided does not elapse accurately and constantly during the brewing process. However, in order to obtain the best possible brewing results, it is necessary that the fibers protruding from the closed clamp are almost completely captured by the circular comb segment. This is only partly achieved with the drive arrangement of the clamping unit. In order to avoid collisions between the circular comb segment and the lower clamping plate, an accurate mechanical connection is required between the drive unit of the clamping unit and the circular comb. This means that individual control of the circular comb to adapt to a specific technology is not possible with the drive arrangement or only within a very limited frame.

  Furthermore, it can be seen from the published document that the upper clamping plate pivotally supported on the clamping frame via a pivot arm is moved via a spring leg coupled to a drive device. In order to control the movement of the upper clamping plate or to achieve a suitable clamping action, the spring legs are controlled via an eccentric drive. Furthermore, the time of opening and closing the clamp and the reliability of the supply switching are controlled via the state of the spring leg or its eccentric drive. This device provides a suitable clamping action and good adjustment possibilities in connection with the driving device of the clamping unit, but has a relatively expensive and expensive construction.

  From DE-PS231797, it is a driving device for a clamping unit, in which a lower clamping plate is fixedly coupled to a lever and the pivot axis of the lever is arranged below the circular comb. These drive devices are known. In this case, a link rod is engaged with the rear end portion of the clamping frame, and the link rod is coupled to two levers that can rotate on one axis. These levers hold rollers at their ends, each of which is guided on a driven cam disk. The movement of the clamping unit is controlled via this cam disk. The disadvantage of this arrangement is that the distance between the clamping part of the clamping unit and the envelope circle of the circular comb segment is not kept constant during the eyelash process. This is because the pivot axis of the pivot arm of the lower clamping plate is arranged far away from the lower side of the circular comb shaft.

  An object of the present invention is to provide a simplified driving device for a clamping unit. In this case, in particular, the distance between the clamping pin grip of the lower clamping plate and the envelope circle of the comb segment of the circular comb should be kept constant throughout the combing process.

  The object of the present invention has been solved by the fact that the free end of the swivel arm supported so as to be pivotable about a circular comb shaft is fixedly connected to the clamping frame.

  This on the one hand keeps the eyelash state constant during the entire combing process and eliminates the collision between the circular comb segment and the lower clamping plate. Furthermore, this allows the drive of the circular comb to be individually controlled and is no longer directly related to the driving of the clamping unit.

  Furthermore, according to the invention, it is proposed to provide another swivel arm that is coupled to the clamping frame via a rotating hinge and to connect the swivel arm to a drive element that is coupled to a drive device. It has been proposed that the other swivel arm has a two-part configuration and is provided with a rotating hinge for transmission without drive problems.

  Further, an upper clamping plate supported by a clamping frame via a side turning arm is arranged, and each turning arm is pivotally attached to a spring leg that can turn about an axis, and can turn. It has been proposed that the shaft of the spring leg is arranged on the underside of the clamping unit in a fixed manner on the machine frame. This arrangement makes it possible not to control the upper clamping plate individually via the spring legs. In other words, with appropriate support of the spring legs, the opening and closing movement of the upper clamping plate can be initiated or controlled by the movement of the clamping frame. This means that a special drive is no longer necessary to carry out this movement.

  Advantageously, the axis of the spring leg can be arranged behind the circular comb axis and below the tearing cylinder following the clamping unit in the material flow direction. For example, to adapt the movement of the upper clamping plate to specific conditions (fiber material, cotton thickness, etc.), the bearings of the spring leg shafts in the machine frame transverse to the longitudinal direction of the spring legs It has been proposed to fix in an adjustable manner. In order to be able to make precise adjustments, the bearing adjustment device is preferably provided with an adjustment mark. The spring legs can consist of compression springs guided in the cylinder. In particular, in order to be able to adjust the minimum distance between the clamping lip of the lower clamping plate and the envelope circle of the comb segment of the circular comb, it is proposed to provide means for changing the length of the front swivel arm Has been.

  As long as the swivel arm is releasably secured to the clamping frame via a securing means, the stated minimum spacing can also be adjusted by interposing or removing the spacer plate. This can also compensate for existing manufacturing errors.

  In order to introduce the reciprocating movement of the clamping unit, the drive means for another swivel arm or the rear swivel arm converts the continuous movement produced by the main drive into a discontinuous movement. It has been proposed. Advantageously, this non-continuous movement is configured to be adjustable.

  The driving means may be in the form of a driven cam disc and may be non-rotatably coupled to a shaft continuously driven by the main drive.

  It is also conceivable to drive the clamping unit via a separate single motor. In this case, the rotation angle control device for the single motor is connected to the control device for the main drive motor or to the means driven by the main drive motor.

  Further, at least one other arm is coupled to the clamping frame via a rotary hinge, the other end of the arm is rotatably supported on the eccentric body, and the eccentric body is drivingly coupled to the drive device. Proposed. This allows for a simple drive configuration. In this case, the eccentric disc can also be driven discontinuously in order to adapt the course of movement accordingly.

  Hereinafter, the present invention will be described based on illustrated embodiments.

  FIG. 1 is a schematic side view of a clamping unit of a known structure type.

  FIG. 2 is a schematic side view of a clamping unit according to the present invention.

  FIG. 3 is a simplified view of the clamping unit of FIG. 2 together with a driving device.

  FIG. 4 is a view corresponding to FIG. 3, showing another embodiment having a cam disk drive device.

  FIG. 5 is a schematic view corresponding to FIG. 2 showing a clamping unit using a driving device of another embodiment.

  FIG. 1 shows a clamping unit 1 that is supported via a crank arm 2, 3 so as to be capable of turning. In this case, the two crank arms 2 are pivotally supported on the circular comb shaft 5 at the sides of the circular comb 4. The other end of the swivel arm 2 is fixed to the clamping frame 8 so as to be able to rotate. The rear swivel arm 3 (which can also be two) is supported on the clamping shaft 10 so as not to rotate. The free end on the opposite side of the swivel arm 3 is connected to a clamping frame 8 via a shaft 9 so as to be able to rotate.

  The clamping unit 1 mainly comprises a lower clamping plate 12 and an upper clamping plate 14 (partially also called a clamping knife) fixedly connected to the clamping frame 8. The upper clamping plate 14 is fixed to the two pivot arms 15, 15 '. The swivel arms 15 and 15 'are attached to the clamping frame 8 so as to be swivelable via a swivel shaft 16. Further, the swivel arms 15 and 15 ′ are respectively connected to one spring leg 18. The spring leg 18 is supported on a driven eccentric body 21 via a shaft 20. A tearing cylinder pair 24 is provided behind the clamping unit 1 in the material flow direction. The rupture cylinder 24 is driven by the transmission G through a drive train 25 shown schematically. The transmission G is driven by a motor M. The motor M is controlled via the control unit ST.

  The clamping shaft 10 is driven by a partial region of the transmission device G1, which is generated by the motor M and is configured to convert continuous rotational motion into discontinuous rotational motion. As a precaution, the supply cylinder 27 is rotatably supported in the clamping unit 1. The supply cylinder 27 performs a discontinuous rotational movement in order to convey the supplied cotton W in a divided manner via a driving device (not shown). The drive of the eccentric body 21 and the drive of the circular comb shaft 5 are effected from the transmission G in the same manner as shown schematically by drive couplings 30 and 31.

  In the position shown in FIG. 1, the clamping unit 1 is in the rear position. In this case, the clamp is closed and the line W is clamped via the clamping plate 14 or 12. The fiber FB protruding from the clamping point is then caught and squeezed out by the comb segment 7 of the circular comb 4. Next, the swivel arm 3 is swung to the left via the clamping shaft 10, and the clamping unit 1 is swung toward the fracture cylinder 24 around the swivel arm 2. During this turning process, the clamping unit is opened and reaches the forward position. The fiber FB drawn out at this position is placed on the end of the fleece V. Due to the reverse movement of the breaking cylinder shown schematically, the end of the fiber FB reaches the clamping point K of the breaking cylinder 24 in cooperation with the end E of the fleece V and is thereby held in the clamping unit 1. Untreated fibers are drawn from the cotton W. Usually this process further engages a fixed comb, which is not shown for clarity of the drawing. During the breaking process already described, the end of the fiber FB overlaps with the end E of the fiber fleece V, so that after passing the clamping point K, a so-called welding takes place. After the described breaking process, the clamp returns again to the position shown in FIG. 1 and further brewing is started.

  FIG. 2 shows the configuration of the invention of a drive device for the clamping unit 1. The clamping unit 1 is likewise swiveled during the reciprocating movement of the clamping frame via swivel arms 2a attached to both ends of the circular comb about a circular comb shaft 5 of the circular comb 4. Unlike the known structure of FIG. 1, the swivel arm 2 a is fixedly coupled to the clamping frame 8. As a result, the distance a between the clamp pin grip 13 of the lower clamping plate 12 and the envelope circle H of the comb segment 7 remains constant during the clamping movement. In order to be able to adjust this distance a, the swivel arm 2a is formed of two parts 2a 'and 2a ". The parts 2a' and 2a" are detachably connected to each other by a fixing element, for example a screw 22. . The upper part 2a "is fixedly connected to the clamping frame 8. In this case, the connection point 17 inserts a suitable spacer 19 between the parts 2a 'and 2a" which serves to adjust the distance a. It is configured to be able to. This is just one possibility possible for changing the length of the swivel arm 2a and thus the distance a, and other configurations are possible. Further, the stepless adjustment of the swing arm 2a is possible.

  Unlike the structure of FIG. 1, the rear swivel arm 3a has a two-part structure composed of arms 3a 'and 3a "which are coupled to each other via a hinge 3b so as to be swivelable. The end is supported on the shaft of the clamping frame 8 so as to be pivotable. The arm 3a 'is fixed to the clamp boss 32 at the end opposite to the hinge 3b. The clamp of the clamp boss 32 is coupled to the clamp shaft 10 so as not to rotate. In this case, both parts are connected to each other by fixing means (not shown), and at the same time, a non-rotatable connection with the shaft 10 is formed. The driving devices for the breaking cylinder 24, the circular comb shaft 5 and the clamp shaft 10 already correspond to the driving device having the structure shown in FIG. 1, and will not be described in detail here.

  Unlike the configuration of FIG. 1, the swing arms 15 a and 15 b coupled to the upper clamping plate 14 are rotatably supported on the lower side of the supply cylinder 27 via a shaft 16 a. With this arrangement, the supply cylinder 27 can be assembled and taken out without any problem. Spring legs 18a are engaged with the free ends of the swing arms 15a and 15b via hinges 23, respectively. The spring leg 18 a includes a compression spring F. The other end of the spring leg 18a is supported on a shaft 34 fixed to the machine frame MG so as to be capable of turning. In the illustrated embodiment, the shaft 34 is fixed to a bearing element 35 detachably fixed to the holding body 30 via a screw 36. At this time, the holding body 37 is fixedly coupled to the machine frame MG. The coupling between the bearing element 35 and the holding body 37 is configured such that the bearing element 35 or the shaft 34 can be adjusted with respect to the holding body 37. This adjustment is indicated by a retaliatory mark. However, other structures are possible. In this case, the shaft 34 is additionally mounted so as to be adjustable in the vertical direction. This possibility of adjustment of the shaft 34 makes it possible to adjust the clamping force of the clamping lip 13 provided by the action of the spring force of the spring F. Furthermore, via the possibility of adjusting the shaft 34, the closing time of the clamp can be adjusted. Similarly, the adjustment of Ecartement (minimum distance between the clamp lip and the clamping point of the breaking cylinder) can be compensated by the movement of the shaft 34. This is intended to keep the ratio of clamping force / clamping motion constant.

  In the position shown in FIG. 2, the process of lashing the fibers FB by the comb segments 7 has already started. When the eyelash process is finished, the clamping unit 1 moves immediately to the forward position where the clamp is released by loading the clamp shaft 10 in the direction of the tearing cylinder 24 with the transmission part G1.

  Since the swivel arm 2a is fixedly coupled to the clamping frame 8, it is necessary that the rear swivel arm 3a is constructed in a two-part structure and is provided with an additional hinge 3b. When the clamping unit 1 moves forward, the piston 39 moves to the stopper 40 inside the spring leg 18a. This stopper 40 prevents the piston 39 from moving further inside the spring leg 18a. In this position, the length of the spring leg 18 a is fixed by the shaft 34 to the hinge 23. As a result, the upper clamping plate 14 is separated from the clamp pin grip 13 of the lower clamping plate 12 from a predetermined position where the clamping unit 1 pivots forward, and the clamp is released. When the tearing process (for example, disclosed in FIG. 1) is completed, the clamp 1 is turned again to the rear position shown in FIG. 2 via the driven clamp shaft 10. During this turning process, the piston 39 of the spring leg 18a moves toward the hinge 23, so that the spring length of the spring F is shortened. During this process, the upper clamping plate 14 is brought into a closed position with the lower clamping plate 12. In this case, the spring force generated by the spring F generates a clamping force in the region of the clamp lip 13.

  This device enables a simple and cost-effective clapping drive. In this case, on the one hand, the minimum distance between the clamping lip 13 and the envelope circle H is preferably adjusted and kept constant, and on the other hand no additional drive elements are required for moving the upper clamping plate 14. Become.

  3 and 4 show, in simplified form, another embodiment of a drive device for a two-part swivel arm 3a. In this simplified diagram, the individual parts are omitted for the sake of clarity of the diagram, as can be seen from the comparison with FIG. In the embodiment of FIG. 3, the clamp shaft 10 is directly driven by a separate single motor M1. An encoder E1 for detecting the rotational angle position of the motor shaft is present on the motor shaft of the single motor M1. The driving of the breaking cylinder 24 and the circular comb shaft 5 is effected by the central transmission G via the drive coupling 25 or 31 as already described in connection with FIG. The transmission G is driven by the main motor M. Similarly, an encoder EM is disposed on the drive shaft of the main motor M. The drive device for the auxiliary motor M1 is controlled accordingly via the control unit ST connected to the encoders EM, E1. That is, the rotational angle positions of the drive shafts of the motors M and M1 are harmonized with each other.

  FIG. 2 shows an arrangement in which, unlike FIG. 4, a cam disc 42 is used instead of an additional transmission part G1 to cause non-continuous movement on the clamping shaft 10. Yes. The cam disc 42 is seated on a shaft 43 which is fixedly supported by the machine frame and which is drive-coupled to the transmission G via a drive coupling 45. In this case, the transmission device G is driven by the main motor M. The main motor M is controlled via the control unit ST. In this case, the drive of the shaft 43 is continuous. A roller 46 rolls on the cam disk 42, and the roller 46 is fixedly coupled to the clamp shaft 10 via an arm 47. The roller 46 is held in contact with the rotation circle of the cam disk 42 via the spring F1. Similarly, a two-arm lever 3 a is fixedly supported on the clamp shaft 10. The two-arm lever 3a transmits a driving force to the hinge 9 of the clamping frame 8 via the hinge 3b. This configuration gives a simple possibility to convert the continuous drive movement released from the transmission G into the discontinuous movement required for the reciprocating movement of the clamping unit 1. A similar drive arrangement is disclosed in the described DE-PS231797.

  FIG. 5 shows another possibility of driving arrangement of the clamping unit 1. In this case, the arm 52 is coupled to the clamping frame 8 via the rotary hinge 9 so as to be rotatable. At the other end of the arm 52, the arm 52 is fixed to the eccentric disc 50 via the eccentric body 51 so as to be capable of rotating. The eccentric disc 50 is driven by the motor M via the transmission G via the drive coupling 45 shown schematically. Through this transmission G, the circular comb 4 and the breaking cylinder 24 are also driven as already described in the previous embodiment. However, other driving possibilities are also conceivable.

1 is a schematic side view of a clamping unit of a known structure type. FIG. 2 is a schematic side view of a clamping unit according to the present invention. The figure which simplified and showed the clamping unit of FIG. 2 with the drive device. The figure equivalent to FIG. 3 which showed another Example which has a cam disk drive device. FIG. 3 is a schematic view corresponding to FIG. 2 showing a clamping unit using a driving device of another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Clamping unit 2,3 Crank arm 4 Circular comb 5 Circular comb shaft 7 Comb segment 8 Clamping frame 9 Axis 10 Clamping shaft 12 Clamping plate 13 Clamp lip 14 Clamping plate 15, 15 'Rotating arm 16 Rotating shaft 17 Joint point 18 Spring leg 19 Spacer 20 Shaft 21 Eccentric body 22 Screw 23 Hinge 24 Rupture cylinder 25 Drive train 27 Supply cylinder 30, 31 Drive joint 32 Clamp boss 34 Shaft 35 Bearing element 36 Screw 37 Holder 39 Piston 42 Cam disc 43 Shaft 45 Drive coupling 46 Roller 47 Arm 50 Eccentric disc 51 Eccentric body 52 Arm

Claims (15)

  Clamping unit (1) of a combing machine, having a clamping frame (8) with a lower clamping plate (12), the clamping frame (8) being driven by a drive element (10, G) A circular comb that can reciprocate via at least one swivel arm (2a) and that is pivotally supported on a machine frame (MG) below the clamping unit (1). 4) In the type that is supported so as to be pivotable about the axis (5) of 4), the free end portion of the swivel arm (2a) supported so as to be pivotable about the circular comb shaft (5) is a clamping frame. Clamping unit for combing machine, characterized in that it is fixedly connected to (8).   Another swivel arm (3a) connected to the clamping frame (8) via a rotating hinge (9) is provided, and the swivel arm (3a) is connected to the drive device (M, M ′). Clamping plate according to claim 1, connected to the drive element (10, G).   Clamping unit according to claim 2, wherein the further swivel arm (3a) consists of two parts and comprises a rotating hinge (3b).   An upper clamping plate (14) supported via a lateral pivot arm (15a, 15b) is arranged on the clamping frame (8). In this case, the pivot arm (15a, 15b) is connected to a shaft ( 34) is pivotally mounted on a pivotable spring leg (18a) about which the axis (34) of the pivotable spring leg (18a) is attached to the machine frame (MG) below the clamping unit (1). The clamping unit according to any one of claims 1 to 3, wherein the clamping unit is fixedly arranged.   Clamping according to claim 4, wherein the bearing (35) of the shaft (34) of the spring leg (18a) is fixed to the machine frame (MG) so as to be adjustable transversely to the longitudinal direction of the shaft (34). unit.   Clamping unit according to claim 4, wherein the adjustment device (36) for the bearing (35) comprises an adjustment mark.   The shaft (34) of the spring leg (18a) is arranged behind the circular comb shaft (5) and below the breaking cylinder (24) following the clamping unit (1) when viewed in the material flow direction. The clamping unit according to claim 4.   Clamping unit according to any one of claims 4 to 7, wherein the spring leg (18a) comprises a compression spring (F) guided by a cylinder.   9. Clamping unit according to claim 1, wherein means (17, 22) for changing the length of the front swivel arm (2a) are provided.   10. Clamping unit according to claim 9, wherein the forward swivel arm (2a) is fixed to the clamping frame (8) via a fixing means (22) in a detachable manner.   Clamping unit according to claim 1, 2 or 3, wherein the drive element (G1) is arranged to convert the continuous movement produced by the main drive (G) into a discontinuous movement.   12. Clamping unit according to claim 11, wherein means are provided for adjusting the discontinuous movement.   The drive element is a cam disc (42), the cam disc (42) being non-rotatably coupled to a shaft (43) continuously driven by a main drive (G). Item 12. The clamping unit according to Item 11.   The drive means is the drive motor (M1), and the rotation angle control device of the drive motor (M1) is connected to the control device (EM) of the main drive motor (M) or the means driven by the main drive motor. The clamping unit according to claim 1 or 2.   At least one other arm is connected to the clamping frame (8) via a rotating hinge (9), and the other end of the arm is rotatably supported on an eccentric body, the eccentric body Clamping unit according to claim 1, wherein is coupled to the drive device (G, M).

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