Device on a spinning preparation machine, in particular drafting machine, carding machine, combing machine or the like, with a drafting unit

Abstract

Device on a spinning preparation machine, in particular drafting machine, carding machine, combing machine or the like, with a drafting unit (S), a drafting unit lower part (16) in which lower rollers (I, II, III) are mounted, and a drafting unit upper part in which upper rollers (4) are mounted, wherein the upper part of the drawing machine can be moved from an open position (relief) to a closed position (loading) and back, and comprises pressure arms (11) as a pressure device, in which an upper roller (4) is mounted about an axis of rotation, and which together with the associated upper roller (4) are pivotably attached to a first side of the lower part of the drawing machine by means of a rotary bearing (10) about a pivot axis, wherein the pivot axis is arranged transversely to the axis of rotation of the upper roller (4), and in which a release or locking device for pressure devices of the upper rollers (4) is provided, which is arranged on a second side of the drafting unit lower part (16) facing away from the first side and implements a one-hand operating device with which the release and opening or the closing and locking of the pressure devices of the drafting unit (S) are carried out in one operation.

Description

[0001] The invention relates to a device on a spinning preparation machine, in particular a drafting machine, carding machine, combing machine or the like, with a drafting unit, a drafting unit lower part in which lower rollers are mounted and a drafting unit upper part in which upper rollers are mounted, wherein the upper part can be moved from an open position (relief) to a closed position (loading) and back and in which a release or locking device for the pressure devices of the upper rollers is provided.

[0002] In a known device (DE 195 48 840 A1), the drafting unit is subjected to load during operation, meaning that the upper and lower rollers and the fiber strip between them are in contact with each other under pressure. For this purpose, pressure elements are attached to the upper rollers, which in turn are connected to the pressure arms. The pressure arms are pulled towards the drafting unit by means of a locking device, so that the upper rollers are pressed against their corresponding lower rollers. The locking device has two load hooks, one for each pressure arm. The load hooks engage a bolt on each pressure arm, thereby transmitting a tensile force exerted on the load hooks to the corresponding pressure arm. When the pressure arms are released by the locking device, the load hook, after no longer exerting a tensile force on the pressure arm, pivots away from the bolt, so that the pressure arms can now be pivoted away.The pressure arms no longer exert any force on the drafting rollers. The rollers are now only loaded by their own weight. The locking device, which allows the pressure arms and upper rollers to be pressed against and locked in place, consists of a locking element to which a control element engages, causing the load hook to move from its open to its closed position. The bolt is always positioned in the same place when the drafting unit is closed. This ensures that the pressure means exert a predetermined force on the drafting cylinders via an adjustment mechanism. The magnitude of the force applied by the control element has no influence on the force with which the upper rollers are pressed against the lower rollers. The position of the load hook, and therefore also that of the pressure arms, is always the same in the closed position.The control element consists of a pneumatic cylinder connected to a control valve. The control valve, in turn, is controlled by a control unit. In this device, a rod is positioned transversely to the fiber material flow direction (fiber strip direction), around which the spring-loaded and simultaneously pneumatically actuated load hooks engage. The known device is complex in its design. The load hooks on the one hand and the pressure arms on the other, each with its own pivot point, are rotated in opposite directions. A disadvantage of this design is that the drafting unit is first unlocked with a separate locking device, whereby in a first step the load hooks are rotated counterclockwise – viewed in the fiber direction. After unlocking, the pressure arms are then separately and manually swung away clockwise in a second step.

[0003] From DE 39 04 108 A1, a load carrier for drafting units of a spinning machine is known. A support for pressure rollers, pivotable about a stationary support rod, and a load lever are provided, which are pivotably connected to each other about a pivot axis on a first longitudinal side of the load lever. The pivot axis is aligned parallel to the axis of rotation of the pressure rollers. The support and the load lever are operatively connected on the first longitudinal side of the load lever via a locking arrangement.

[0004] From CH 690 778 A5, another load-bearing device for drafting units of a spinning machine is known. A pivotable upper roller support arm is pivotally mounted on a stationary support. The pivot axis is aligned parallel to the axis of rotation of the pressure rollers. The upper roller support arm is unlocked and locked on the support by means of a manual actuating element, which consists of a push rod mounted longitudinally displaceable inside the upper roller support arm and is provided at one end with a handle located on the outside of the upper roller support arm.

[0005] The invention is therefore based on the objective of creating a device of the type described above which avoids the aforementioned disadvantages and which, in particular, enables operation with a single hand in a structurally simple manner when unlocking / opening or closing / locking.

[0006] This problem is solved by the characterizing features of claim 1.

[0007] The simplicity of this design offers the particular advantage that unlocking and opening can be achieved with one hand simply by lifting the actuator. The combined action of the opener and closer latch allows simultaneous locking / opening and closing / locking in a single operation.

[0008] Claims 2 to 30 contain advantageous further developments of the invention.

[0009] The invention is explained in more detail below with reference to exemplary embodiments illustrated in drawings.

[0010] It shows: Fig. 1 Schematic side view of the drawing frame of a track for the device according to the invention, Fig. 2 a pressure arm according to section I - I according to Fig. 1 in unlocked and open (swiveled) position, Fig. 3a to 3d the unlocking or locking device in the locked closed position ( Fig. 3a, Fig. 3c) and in the unlocked open position ( Fig. 3b, Fig. 3d) and Fig. 4 the unlocking or locking device in combination with the opening and closing device.

[0011] After Fig. 1. A drafting unit S, e.g., Trützschler drafting unit TD 08, is present. The drafting unit S is designed as a 4-over-3 drafting unit, i.e., it consists of three lower rolls I, II, III (I output lower roll, II intermediate lower roll, III input lower roll) and four upper rolls 1, 2, 3, 4. In the drafting unit S, the fiber bundle 5, consisting of several fiber strips, is drawn. The drawing process comprises pre-drawing and main drawing. The roll pairs 4 / III and 3 / II form the pre-drawing section, and the roll pairs 3 / II and 1 / 2 / I form the main drawing section. The output lower roll I is driven by the main motor (not shown) and thus determines the delivery speed. The input and intermediate lower rolls III and II, respectively, are driven by a variable speed motor (not shown). The upper rollers 1 to 4 are mounted by pressure elements 91 to 94 (loading device) in pressure arms 11a to 11d pivoting around rotary bearings (see figure). Fig. 2) pressed against the lower rollers I, II, III and thus receive their drive via friction. The direction of rotation of the rollers I, II, III; 1, 2, 3, 4 is indicated by curved arrows. The fiber assembly 5, which consists of several fiber strips, runs in direction A. The lower rollers I, II, III are in dies 14 (see below). Fig. 3) are mounted on the machine frame 17.

[0012] Accordingly Fig. The upper roller 4 is associated with the portal-shaped pressure arm 11a, which consists of two lateral pneumatic cylinders 9a1 and 9a2 (pressure elements), a common support element 12a, two retaining elements 13a1 and 13a2, and two intermediate elements 14a1 and 14a2. The pressure arm 11a, together with the upper roller 4, is pivoted about a rotary bearing 10, which is attached to the punch 16a. The cover elements 13a1 and 13a2 are angled (right-angled) when viewed from the side, with one angled arm of the cover element 13a1 being rotatably mounted on the rotary bearing 10 at its free end. The other angled arm of the cover element 13a2 has in the area of ​​its free end a part of a locking device 15, the closing latch 21 of which can be engaged and disengaged with a bolt 22 fixedly attached to the machine frame 17 (see figure). Fig. 3a to 3d). The pressure arm II a is shown in the unlocked and open position.

[0013] After the Fig. 3a to 3d, the locking mechanism 15 consists of an opener latch 20, a closer latch 21, and a stationary bolt 22. The opener latch 20 and the closer latch 21 are essentially designed as double levers, each rotatable about a pivot joint 23 and 24, respectively. Furthermore, a handle 33 (see...) is... Fig. 4) present, which applies a force P in the direction of arrow B to one lever arm 201 of the opening pawl 20. The opening pawl 20 is rotatably mounted about the pivot bearing 23, the closing pawl 21 is rotatably mounted about the pivot bearing 24. A tension spring 25 acts between the opening pawl 20 and the closing pawl 21 (see figure). Fig. 3c, Fig. 3d). The tension spring 25 engages with one end a projection 26 on the lever arm 202 of the opening latch 20 and with its other end a projection 27 on the lever arm 212 of the closing latch 21. A stop is designated by 28.

[0014] The locking mechanism is in the Fig. 3a, Fig. 3c is shown in the closed state. The locking mechanism is released by applying force P to the Fig. The direction B specified in 3a is applied to the opening latch 20. This is done by tilting the handle 33 forward. This causes the opening latch 20 to be applied in accordance with Fig. 3c rotated counterclockwise around the pivot joint 23 in the direction of arrow C. The nose at the end of the lever arm 202 of the opening pawl 20 slides out of a recess 21' at the end 212 of the closing pawl 21, and the tension spring 25 rotates the closing pawl 21 counterclockwise in the direction of arrow D when the extension mechanism S (or the pressure arms 91 to 94) is opened, thus releasing the bolt 22 ( Fig. 3b, Fig. 3d). A further recess 21" in the closing pawl 21 moves away from the bolt 22. After unlocking and when the extension mechanism S opens, the opening pawl 20 and the closing pawl 21 are moved upwards in the direction of arrows E and F respectively ( Fig. 3d). The contour of the recess 21' has a certain pressure point effect.

[0015] To close and lock, the mechanism is based on the Fig. The work steps described in 3a to 3d are carried out in reverse order. Starting from the point described in the Fig. 3b, Fig. In the unlocked and open position shown in 3D, the unlocking / locking device 15 is moved into the position shown in the Fig. 3a, Fig. The locked closed position shown in 3c is transferred. In this process, the opening latch 20 and the closing latch 21 are moved in the opposite direction to the position shown in 3c. Fig. Arrows E and F shown in 3d are shifted downwards.

[0016] Accordingly Fig. 4 An opening and closing device 29 is provided, which interacts in combination with the unlocking and locking device 15. A pivot bearing 30 is attached to the outside of the portal arm 14a2, to which one end of each of two rigidly connected lever arms 31, 32 of a double-lever linkage is rotatably hinged. A handle 33 and a bolt 34 are attached to the other ends of the lever arms 31 and 32, respectively. When the handle 33 is pushed upwards in the direction of arrow I, the bolt 34 is moved in the direction of arrow L and presses on the opening latch 20 (see figure). Fig. 3d), thereby unlocking. At the same time, the movement of the handle 33 in direction I via the bearing 33 rotates the entire pressure arm 11a about the pivot bearing 10 in the direction of arrow H, so that the pressure device or the stretching mechanism S is opened (see ). Fig. 2).

[0017] The pivot joints 23 and 24 are attached (not shown) to the portal arm 14a2. Due to this connection, when opening, the handle 33 is moved in the direction of arrow I, and the pressure arm 14a is pivoted (mechanically coupled) in the direction of H, and the locking / unlocking device 15 is moved in the direction of E and F. Similarly, when closing, the handle 33 is moved (mechanically coupled) in the direction of arrow K, and the pressure arm 14a is pivoted in the direction of G, and the locking / unlocking device 15 is moved in the opposite direction to arrows E and F.

[0018] Further features and advantages of the device according to the invention are: - Height adjustment of the upper to lower section of the stretcher is possible using lockable bolts. - The mechanism can be lifted up, but it is also possible, from a design perspective, for it to remain at the bottom. - A latching mechanism is unnecessary if a hook solution is used; the actuator simply unlocks a rotatably mounted hook, which is, however, spring-loaded. - Solution with / without overthrust (form-fit and friction-fit / friction-fit connection) - An emergency release option is available; if the actuator fails, the opener latch can be rotated from a closed latch using a screwdriver or similar tool. - Safety is ensured by monitoring the closing edge using a proximity switch.

Claims

[1] Device on a spinning preparation machine, in particular drafting machine, carding machine, combing machine or the like, with a drafting unit (S), a drafting unit base (16) in which lower rollers (I, II, III) are mounted, and a drafting unit upper part in which upper rollers (4) are mounted, wherein the upper part of the drawing machine can be moved from an open position (relief) to a closed position (loading) and back, and comprises pressure arms (11) as a pressure device, in which an upper roller (4) is mounted about an axis of rotation, and which together with the associated upper roller (4) are pivotably attached to a first side of the lower part of the drawing machine by means of a rotary bearing (10) about a pivot axis, wherein the pivot axis is arranged transversely to the axis of rotation of the upper roller (4), and in which a release or locking device for pressure devices of the upper rollers (4) is provided, which is arranged on a second side of the drafting unit lower part (16) facing away from the first side and implements a one-hand operating device with which the release and opening or the closing and locking of the pressure devices of the drafting unit (S) are carried out in one operation. [2] Device according to claim 1, characterized by that the one-handed operating device enables unlocking and opening or closing and locking in a single operation, one after the other. [3] Device according to one of claims 1 or 2, characterized by , that the stretcher can be unlocked and simultaneously opened or closed and simultaneously locked with one hand. [4] Device according to any one of claims 1 to 3, characterized bythat the one-handed operating device has a handle that can be rotated about a pivot axis. [5] Device according to any one of claims 1 to 4, characterized by , that the unlocking or locking device (15) works in combination with the opening and closing device (29). [6] Device according to claim 4 characterized by , that the handle can be locked in a closed position by a locking device and actuates an adjusting arm. [7] Device according to any one of claims 1 to 6, characterized by , that a drive arm of a locking lever protrudes into the rotational path of the adjusting arm. [8] Device according to any one of claims 1 to 7, characterized by that the locking lever, in its initial position, supports the closed position of a rotary latch. [9] Device according to any one of claims 1 to 8, characterized by that the unlocking and locking device comprises an opener latch, a closer latch and a fixed bolt. [10] Device according to any one of claims 1 to 9, characterized by that the unlocking or locking device has a handle, e.g. handles or the like, which is capable of exerting a force on the opening roller. [11] Device according to any one of claims 1 to 10, characterized by , that the opening latch is rotatable around a pivot bearing. [12] Device according to any one of claims 1 to 11, characterized by , that the closing latch is rotatable around a pivot bearing. [13] Device according to any one of claims 1 to 11, characterized by that a tension spring acts between the opener and the closer latch. [14] Device according to any one of claims 1 to 12, characterized by that the tension spring engages the opening pawl with one end and the closing pawl with the other end. [15] Device according to any one of claims 1 to 13, characterized by, that the opening latch engages a projection (nose) which can be brought into and out of engagement with a recess in the closing latch. [16] Device according to any one of claims 1 to 4, characterized by , that to open, the rotatably mounted handle (actuator) also moves a rotatably mounted opening pawl with a positive locking and / or friction locking mechanism with a closing pawl. [17] Device according to any one of claims 1 to 16, characterized by , that to open, a spring force between the opening latch and the closing latch causes the closing latch to pivot open simultaneously when the extension mechanism is pressed. [18] Device according to any one of claims 1 to 17, characterized by , that to close the extension mechanism the handle (actuator) can be pressed against an end stop so that the opening latch can rotate freely. [19] Device according to any one of claims 1 to 18, characterized by, that immediately before the closing process is completed, the closing latch engages around a stationary bolt and rotates the opening latch until it engages positively and / or frictionally in the closing latch. [20] Device according to any one of claims 1 to 19, characterized by that the bolt can be locked. [21] Device according to any one of claims 1 to 20, characterized by that each upper roller is assigned a pressure device. [22] Device according to any one of claims 1 to 21, characterized by that each pressure device has a pressure arm and two pressure elements. [23] Device according to any one of claims 1 to 22, characterized by that the pressure arm is portal-shaped. [24] Device according to any one of claims 1 to 23, characterized by , that each pressure arm with the pressure elements can be rotated or swiveled around a rotary or pivot bearing. [25] Device according to any one of claims 1 to 24, characterized bythat the rotary and swivel bearing is assigned to the lower end of one portal arm. [26] Device according to any one of claims 1 to 25, characterized by that the unlocking or locking device is assigned to the lower end of the other portal arm. [27] Device according to any one of claims 1 to 26, characterized by that the unlocking or locking device is aligned in the direction of fiber material flow (working direction). [28] Device according to any one of claims 1 to 27, characterized by , that the unlocking or locking device is arranged parallel to the pressure arms arranged one behind the other. [29] Device according to any one of claims 1 to 28, characterized by that the unlocking or locking device is located next to and outside the pressure arms arranged one behind the other. [30] Device according to any one of claims 1 to 29, characterized bythat at least two unlocking or locking devices are provided, which can be operated by the same handle.

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