WO2010045748A1

WO2010045748A1 - Combing device comprising a pivotable frame

Info

Publication number: WO2010045748A1
Application number: PCT/CH2009/000333
Authority: WO
Inventors: Ueli Stutz; Daniel Sommer
Original assignee: Maschinenfabrik Rieter Ag
Priority date: 2008-10-24
Filing date: 2009-10-15
Publication date: 2010-04-29
Also published as: CN102264959B; EP2350361A1; CN102264959A; CH699790A2; EP2350361B1

Abstract

The invention relates to a combing device for combing a fibre material which is supplied to a gripper unit mounted in a machine frame (MS), said gripper unit comprising a lower gripper plate and an upper gripper plate (2, 3), the upper gripper plate being mounted in such a way that it can move in relation to the fixed lower gripper plate (2) in order to form a clamping point (KS), and being acted upon by a loading device (B3, B4) in order to generate a clamping force. A rotatably mounted feed roller (5) subjected to a loading means forms a clamping point (KK) with the lower gripper plate, and a combing roller rotatably mounted beneath the lower gripper plate (2), in the machine frame (MS), is provided with at least one combing segment (19) and a pull-off segment (20) on the periphery thereof. A rotatably mounted pull-off roller (8) that can be acted upon by a loading means (B1, B2) can be moved towards the pull-off segment in order to form a nip line (KL), and a top comb (K) is arranged between the lower gripper plate (2) and the pull-off roller. In order to simplify the operability, a frame (24) which is pivotably arranged in the machine frame (MS) is associated with the gripper unit, the free end of the frame being pivotable about an axle (46) that is fixed in the machine frame and extends parallel to the rotational axle (9) of the pull-off roller (8), and means (48, 52a, 52b) are provided for fixing the pivotable end of the frame (24) in position, in an operating position and in at least one idle position. At least one of the elements, such as the support (11) for the pull-off roller (8) and/or the support (79) for the feed roller (5) and/or the top comb (K) is held on the frame (24).

Description

Combing device with swiveling frame

The invention relates to a combing device for combing a fiber material according to the preamble of claim 1.

A combing machine, whereby a tear-off roller cooperates with a tear-off segment of a combing roller for the tear-off process, has already been developed by Heilmann in 1845. As can be seen from the Handbook of Cotton Spinning Band Il / 5th Edition on pages 167 to 174 by Otto Johannsen, this was achieved by a tear-off roller (here tear-off cylinder) in conjunction with a tear-off cylinder.

Segment torn fiber packet delivered to a subsequent pair of rollers, where it is connected to the end of an already formed web, or soldered. The pair of rollers is driven by a pilgrim step movement. That Before a new withdrawn fiber package is fed to the roller pair, it is driven in an opposite direction of rotation, in which the end of the already formed web is conveyed back by a partial amount against the actual conveying direction. Once this process is completed, the front end of the new fiber packet is placed on the end of the transported back end of the fibrous web (roof tile-like), or overlapped. During the subsequent forward movement of the pair of rollers, the region of the overlap passes into the nip line of the pair of rollers, as a result of which solidification or soldering of the fiber packet to the end of the nonwoven takes place. After completion of the tearing process, the feed cylinders feed a certain amount of the roll of wadding unrolled from a wrapped roll into the opened tongs. As a result, the length of the tuft extending beyond the clamping point of the tongs increases by the delivered

Amount which is available for the subsequent combing process with subsequently closed pliers. After the combing process through the combing segment of the combing cylinder, the combed out end of the tuft is transferred with the tongs open again under the action of the tear-off segment into the nip between the tear-off roller and the departure segment. All, then the fibers detected by the nip are removed from the present tuft. From CH-PS 150873 a further embodiment is known, which according to the Heilmann principle (interaction of a tear-off with a tear-off on the combing cylinder) works. In this case, various embodiments are shown. In one solution, the nipper unit is fixedly mounted in the machine frame, while the rip-off roller, which cooperates with a tear-off, performs a horizontal movement relative to the nipper unit during the combing process. In another presented solution, the tear-off roller moves only in the radial direction of the combing cylinder, while the nipper unit moves in the horizontal direction to the tear-off roller. Thus, the combing process and the tearing off in relation to the distance between the pliers and the clamping point of the tear-off roller should be better matched. The ends of the tear-off roller are stored in sleeves, which are received in Gabein. In addition, the sleeves, to achieve the clamping effect of the tear-off rollers, acted upon by weight-loaded hooks. In this case, the hooks and thus the tear-off roller are loaded via correspondingly mounted mechanical springs. Such devices are difficult to access for maintenance in the area of the nipper unit and sometimes requires special tools to with

Loading devices loaded elements (such as tear roller, feed roller, etc.) to transfer to an inoperative position.

In view of the high production requirements demanded today with low personnel expenditure, a longer standstill of a job is to be avoided. In particular, in the area of the nipper unit of a comber disorders, such. B. material accumulation occur, which must be eliminated as quickly as possible, so that the subsequent process stage can be supplied with sufficient material. Also, the application of the end of a new fiber material in a material change should be able to be done quickly and easily, without resulting in quality losses in the Ansetzstelle.

The invention is therefore based on the object to improve known devices and to propose a device by means of which a simple and quick accessibility to the nipper unit is made possible.

This object is achieved by proposing that the nipper unit is associated with a pivotally mounted frame in the machine frame, the free end of which is pivotable about a fixedly mounted in the machine frame axis, which runs parallel to the axis of rotation of the tear-off roller, and means are provided, via which the pivotable end of the frame in an operating position and at least one Ausserbetriebsstellung in its position is determined and at least one of the elements, such as the storage of Abreisswalze and / or the storage of the feed roller and / or the Fixkamm is held on the frame. This makes it possible in a simple manner, after the pivoting of the frame in an inoperative position to provide access to the nipper unit to possibly perform maintenance and installation work. This means that the elements pivoted out by means of the frame, such as the tear-off roller, the feed roller and the fixed comb, allow free access to the nipper unit. Preferred is an embodiment, wherein all of said elements that participate in the combing and tearing process can be swung out of their work area simultaneously with the pivoting of the frame. This allows a completely free access to the fiber material within the nipper unit. Thus, it is also possible, possibly occurring material congestion in the nipper unit (short "pliers" called) to eliminate them after swinging the frame quickly and easily to resume the operation of the comber as quickly as possible. In addition, this device also facilitates the piecing process of a new end of the wad after a roll change.

In general, the tear-off roller is followed by a web-forming device, in which the fiber packages drawn off from the tear-off roller are brought together to form a fiber fleece, or are soldered. It is conceivable that also elements of this device are attached to the swing-out frame, via which they can also be moved into a shut-off position.

The claimed use of a swing-out frame is particularly suitable for one embodiment wherein the lower tong plate remains in a stationary position in the machine frame during a comb play. The term "stationary" refers to the position of the tong plate tangent to the combing cylinder A slight movement of the lower tong plate during a comb play, seen in the radial direction of the combing cylinder, is still included under the term "stationary". It would also be conceivable to use such a frame in a combing machine with a back and forth oscillating pliers. However, such a solution would be structurally very expensive, since the swinging motion must be taken into account. To form a nip of the feed roller with the lower pliers plate, the feed roller can rest directly on the lower pliers plate or optionally be positioned at a small distance to the lower pliers plate in its working position.

In order to enable a pivoting of the upper tong plate in an inoperative position, it is necessary to convert the loading device of the tong plate in an ineffective position. Therefore, it is further proposed that the loading device for the upper tong plate is also held on the frame.

Preferably, the loading device is formed of bellows cylinders, which is supported at one end to the frame and at its other end on connected to the upper pliers plate elements. This gives a space-saving and low-vibration load device, which is also easily coupled with the elements of the pliers plate. This is preferably achieved when the elements are each equipped with a support surface for the bellows cylinder, which are provided with an opening into which an extension of the bellows cylinder protrudes when the bellows cylinder is supported on the support surface.

In order to exert a pressure load of the feed roller on the fiber material in the forceps, or in the feed trough of the forceps, an embodiment is proposed, wherein the bearing of the feed roll are movably held in guides connected to the frame receptacles and spring elements are provided in the guides, the are arranged between the receptacle and the respective storage of the feed roller. The recordings can also be integrated directly in the frame. With this proposed embodiment, a clamping force of the also mitverschwenkten feed roller is generated on the fiber material in the pliers during pivoting of the frame from a non-operating position to an operating position at the same time. For exact coordination of the motion sequences of feed roller and ridge during the combing process, it is proposed that the ridge be movably mounted on the pivotable frame and connected to drive means which are coupled to further drive means for driving the feed roller.

Furthermore, it is proposed that the tear-off roller is rotatably mounted on both sides in bearing receptacles, which are held on the pivotable frame via retaining elements.

This allows for easy attachment to the frame, as well as the attachment of an additional adjusting device to make the distance (Ecartement) adjustable between the lower tong plate and the tear-off roller.

To load the tear-off roller is further proposed that the holding elements are movably mounted in the direction of the axis of rotation of the combing cylinder in guides on the pivotal frame and the loading means of the tear-off rest with one end on the respective holding element and with its other end on the pivotal frame.

Preferably, loading means are proposed from pressurizable with compressed air bellows cylinders (B1, B2), which are each secured with its one end on the pivotable frame. These have excellent damping and noise reduction properties in this application and also require little space.

Further advantages will be described in more detail with reference to subsequent embodiments and shown. 1 is a schematic side view of a combing head with a swing-out frame claimed according to the invention. FIG. 2 is an enlarged partial view of FIG. 1 in the region of the feed roller FIG. 3 is a partial view X according to FIG

Fig. 1 shows a schematic side view of a combing head, of which several are usually arranged side by side. In this case, a schematically indicated nipper unit 1 is provided above a combing cylinder 16. The combing cylinder 16 is rotatably mounted about the axis 15 in the machine frame. On its circumference, the combing cylinder 16 has a Kämmsegment equipped with sets 19, the opposite a tear-off segment 20 is arranged. In addition, hubs 23 are non-rotatably mounted on the axle 15, are mounted on soft cams 22, on soft a tear-off roller 8 is guided with its peripheral surface U2 during a Kammspieles. As can be seen from FIG. 3, the tear-off roller 8 is supported in each case on a cam disc 22 in the region of its two ends.

The tear-off roller 8 is rotatably supported on both sides via its axis 9 via the bearings L in bearing receivers 11, as can be seen from FIG. On the bearing receivers 11, a holder 12 is fixed in each case, which is guided in each case in a guide 58 which are attached to the side plates 24 a, 24 b of the frame 24. Above the guides 58, a plate 18 is fixed to the holders, on each of which a bellows cylinder B1, or B2 is supported on the support surface 28. Each bellows cylinder B1, B2 is accommodated in a head part 35 and is fastened via a bracket 36 by means of screws 44 to the respective side plate 24a or 24b of the pivotable frame 24. The bellows cylinders are connected via the lines 37, 38 and a valve 42 with a compressed air source 40 in connection. The supply of compressed air via the valve 42 is controlled by a control unit ST, which is connected via the line 43 to the valve.

The bellows cylinder B1, B2 are based on their free ends on support surfaces 28 of the plates 18 from. In this case, the bellows cylinder at its end, with which they are supported on the support surface 18, an extension 31 which projects into an opening 33 which is mounted in the plates 18. Thus, the bellows cylinder are laterally stabilized and held in position.

As shown schematically in FIG. 1, the fiber package P drawn off via the action of the nip line KL from a fiber tuft FB is placed on the end of a fiber fleece V already formed on a screen drum T and brazed thereto with partial overlap. The nonwoven fabric V thus formed is removed via take-off rollers 64 of the screen drum T and fed to a device not shown in detail for forming a sliver. To the screen drum T, a negative pressure is applied to guide the fiber web V. The sieve drum T, or the device for Forming a combed fiber fleece can z. B. the execution correspond, as shown and described in detail in the published WO 2006/012759 A1.

On the hubs 23 of the combing cylinder axis 15 further schematically indicated cams 26 are rotatably attached, on which during a comb play a respective roller 27 is guided, which are rotatably mounted in tabs 25. The tabs 25 are attached to pivot arms 6 of an upper tong plate 3. As can be seen from FIG. 3, a swivel arm 6 is provided on both sides of the combing head, which are supported by a roller 27 on a correspondingly assigned cam 26. About the guided on the cams 26 rollers 27, the movement of the pivot arms 6 and thus the closing movement of the nipper unit is controlled.

As already partially described, the nipper unit 1 consists of a fixed fixed in the machine frame bottom pliers plate 2, on which about an axis 4, the upper pliers plate 3 is pivotally mounted via pivot arms 6. At the pivot arms 6 in the region of the tong plate 3 load devices in the form of bellows cylinders B3, B4, via which a clamping force at the clamping point KS between the pliers lips of the pliers plates for clamping a fiber material F is generated with closed pliers. As can be seen in particular from FIGS. 2 and 3, the bellows cylinders B3, B4 are supported on bearing surfaces 13 of plates 14 attached to the arms 6. In this case, as shown schematically in Figure 3, in each case a plate 14 is provided in the respective end region of the upper tong plate 3. Each bellows cylinder B3, B4 is received in a head portion 75 and is secured via a bracket 76 via screws 44 on the pivotable frame 24. The frame consists of two, mounted on an axle 46 side plates 24a, 24b, which are connected to one another via a plurality of struts V1, V2. For reasons of clarity, only two such struts (FIG. 3) are shown in the present example. Via schematically indicated lines 77, 78, the bellows cylinder B3, B4 are acted upon by compressed air source 40 (see FIG. 3) with compressed air.

As can be seen from Fig. 2, the bellows cylinder B3, B4 at its end, with which they are supported on the support surface 13, an extension 57, which project into an opening 56 in the operating position, which are mounted in the plates 14. Thus, the bellows cylinder are laterally stabilized and held in position.

Within the nipper unit 1, a feed roller 5 is rotatably arranged, which are held at both ends (one end only) via holders 80 and screws 72 on the frame 24, or on its side plates 24a, 24b. The holders 80 are provided with a guide slot 81 (FIG. 2), in which the bearing 79 for the axis 7 of the feed roller 5 is displaceably guided. Within the respective guide slot, a spring 84 is mounted between the bearing 79 and the end face 85 of the guide slot 81, which presses the bearing 79 in the direction of the lower tong plate 2 and generates a Kiemmkraft at the nip KK on the fibrous material F to be conveyed in the operating position shown , The displacement of the bearing 79 within the guide slot 81 is limited by a plate 82 which is secured to the lower end of the respective holder 80. This limitation of the movement is necessary when the feed roller 5 is pivoted about the frame 24 upwards in a dot-dashed out of operation position. Thus, the bearings 79 are held within the guide slots 81 in this position. In the operating position shown, a distance, or a clearance 73 between the bearing 79 and the plate 82 is present, so that the compressive force of the springs 84 comes to full effect to generate the necessary Kiemmkraft.

The drive of the feed roller for the intermittent promotion of the fiber material F takes place in the example shown via a lever 86 which is connected to the axis of rotation 7 of the feed roller 5. Via a rotation axis 87, the lever 86 is connected to a further lever 89. This in turn is connected via a rotary joint 94 with a two-armed lever 100 which is pivotally mounted about an axis 99 fixed to the machine frame MS. At its other free end, the lever 100 has a rotatably mounted roller 83, which is supported by the action of a correspondingly arranged spring 51 on the peripheral surface of a cam 62. The cam 62 is driven via an axle 63 mounted in the machine frame. The spring 51 is supported on the machine frame MS. On the lever 86, a lever 97 is connected via a rotation axis 98, which at its other end via a further pivot axis 96 with a pivotable arranged fixed comb K is in drive connection. The fixed comb K is pivotally mounted about an axis fixed to the frame 24. This drive connection ensures a synchronous movement of the feed and the fixed comb movement during a comb play.

As already described, the frame 24 is pivotally mounted about a pivot axis 46 on the machine frame MS. By the pivoting of the frame 24 about the axis 46 in an upper position, as shown in phantom in Figure 1, the free access in the area of the nipper unit 1 is made possible for maintenance and cleaning purposes. For pivoting in a different position of the frame 24 handles 88 are provided which are attached to the frame 24. This facilitates the operator the pivoting process, especially since the lever arm is extended by the handles. When swinging up into the position shown in phantom with the machine stopped, the tear-off roller 8 is transferred via the guided guides 58 in the holder 12 in an upper position. In the pivoting operation, the respective plate 18 is moved by the weight of the tear-off roller 8 in the direction of the guide 58 until it is present there and further displacement is prevented. Likewise, the attached to the frame 24 elements such as the fixed comb F _1, the feed roller 5 and the bellows cylinder B3, B4 are pivoted into an upper dot-dash line position. The geometric conditions are to be designed so that z. B. the feed roller 5 can be pivoted without collision with the upper tong plate 3 upwards. Likewise, the drive elements for driving the feed roller and the fixed comb are geometrically interpreted so that the pivoting process is not hindered by these elements and their function is not affected.

When swinging the feed roller 5 in the inoperative position, the respective bearing 79 is displaced in the direction of the plate 82 by the spring force of the springs 84 until it is present there and further displacement is prevented. When transferring the frame 24 in the operating position shown, the feed roller comes before reaching the end position to rest on the fiber material, or on the lower tong plate 2. Upon further pivoting of the frame to the locked end position, the bearing 79 moves against the spring 84, causing the required spring pressure to achieve a certain clamping force is built up. As can be seen from Fig. 2 is in the operating position again a distance, or a clearance 73 between the bearing 79 and the plate 82 is present, so that the spring force of the spring 84 comes back to full effect. Furthermore, the extension 57 of the bellows cylinder B3, B4 is pulled out of the openings 56 during the pivoting process. When pivoting back into the operating position, the connection between the openings 56 and the extensions 57 is automatically restored. To fix the respective position (operating position, inoperative position) of the frame, z. B. on the frame 24, or on the transverse strut V1 cams 48 attached, which, depending on the position, engage in correspondingly formed locking means 50a and 50b and fixed there. The locking devices 50a, 50b consist in each case of oblique contact surfaces provided with bolts 52a, 52b, which are attached to the machine frame MS. This attachment of the latch 52a, 52b is such that the latch can move by a certain amount when engaging or disengaging the cam 48. This movement takes place against the force of a correspondingly arranged spring 55, which is also supported on the machine frame MS. By the already described and shown in Figure 1 inclined contact surfaces of the latch 52a, 52b is a problem-free release, or locking in the respective position possible. Again, there are a lot of

Variants possible to fix the frame in the respective position, or secure lock.

After swiveling up to the inoperative position, the operator has a completely free access to the nipper unit and can easily perform maintenance and cleaning work there. As indicated by dashed lines in Fig. 1, the upper tong plate 2 can be swung over the pivot arms 6 effortlessly upwards, as no load device is more engaged.

The proposed invention allows a simple and fast operation of the individual combing heads without much effort and without special tools.

Claims

claims

A combing device for combing a fiber material (F) supplied to a nipper unit (1) mounted in a machine frame (MS), comprising a lower and upper nipper plate (2,3), the upper nipper plate

(3) is movably supported with respect to the lower fixed pliers plate (2), for forming a nip (KS), and is urged by a loading means (B3, B4) to produce a clamping force and rotatably driven by a loaded with a loading means mounted feed roller (5) which forms a clamping point (KK) with the lower tong plate (2) and with a below the lower tong plate (2), in the machine frame (MS) rotatably mounted combing cylinder (16) on its circumference with at least a Kämmsegment (19) and a Abreisssegment (20) is provided, wherein the Abreisssegment one, on loading means (B1, B2) acted upon and rotatably mounted Abreisswalze (8), to form a nip (KL), undeliverable and one, between the lower pliers plate (2) and the tear-off roller arranged fixed comb (K), characterized in that the nipper unit (1) in the machine frame (MS) pivotally mounted frame (24) is arranged, the free end of a fixedly mounted in the machine frame axis (46) is pivotable, which parallel to the axis of rotation (9) of the

Abreißwalze (8) extends, and means (48, 52a, 52b) are provided, via which the pivotable end of the frame (24) in an operating position and at least one inoperative position is detectable in its position and at least one of the elements, such as the storage ( 11) of the tear-off roller (8) and / or the bearing (79) of the feed roller (5) and / or the fixed comb (K) is held on the frame (24).

2. combing device according to claim 1, characterized in that the loading means (B3, B4) for the upper tong plate (3) on the pivotable frame (24) is held.

3. comb device according to claim 2, characterized in that the loading means of bellows cylinders (B3, B4) is formed, which with its one end on the pivotable frame (24) and with its other end on the upper tong plate (3) connected to elements (14) is supported.

4. Comb device according to claim 3, characterized in that the elements (14) are each provided with a support surface (13) for the bellows cylinder (B3, B4), which are provided with an opening (56) into which an extension (57). of the bellows cylinder (B3, B4) protrudes when the bellows cylinder is supported on the support surface (13).

5. combing device according to claim 1, characterized in that the bearing (79) of the feed roller (5) are movably held in guides (81) connected to the frame (24) receptacles (80) and spring elements (84) in the guides (81) are provided, which are arranged between the receptacle (80) and the respective bearing (79) of the feed roller (5).

6. combing device according to claim 1, characterized in that the fixed comb (K) is movably mounted on the pivotable frame (24) and with drive means (97) is connected, which with further drive means (86, 89, 100) for driving the feed roller (5) are coupled.

7. combing device according to claim 1, characterized in that the tear-off roller (8) is rotatably mounted on both sides in bearing receivers (11), which are held by holding elements (12) on the pivotable frame (24).

8. combing device according to claim 7, characterized in that the

Holding elements (12) in the direction of the axis of rotation (15) of the combing cylinder (16) are movably mounted in guides (58) on the pivotable frame (24) and the loading means (B1, B2) of the tear-off roller (8) with its one end on the support respective retaining element (12) and with its other end on the pivotable frame (24).

9. combing device according to claim 8, characterized in that the loading means can be acted upon by compressed air bellows cylinders (B1, B2) exist, which are each secured with its one end on the pivotable frame (24).