JP2013023808A - Bundling device for spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction device which does not require an additional sealing element in the area of a connection part and ensures the optimum guiding of air within the suction device.SOLUTION: For aerodynamic bundling of fibrous materials V, the suction device sucks bundling air from two interchangeable suction units 10 and 10a on a twin drafting device 2z of a spinning machine 2. Outflow openings O1 and O2 of the suction units include a flange F1 and a flange F2, respectively, which include flat abutment surfaces A1 and A2 and are closed in a square manner. The abutment surfaces A1 and A2 are arranged so as to be adjacent to each other in a common connection part KS and are in contact with a circumferentially closed flat abutment surface A of a common square-formed opening O of a suction tube 22. The flanges F1 and F2 completely cover the opening of the suction tube at the outflow openings of the suction units, and are retained on the abutment surface of the suction tube by pressing force via retaining means 17.

Description

  The present invention relates to a suction device of the type described in the superordinate concept of claim 1, i.e. two interchangeable twin draft devices of a spinning machine for focusing the fiber material into aerodynamics. A suction device for sucking focused air from a suction unit, in which the fiber material is guided through each one suction zone by rotating focusing elements with perforations located opposite each other, to each focusing element The arranged suction unit has a suction opening, and the suction opening is connected to a suction passage incorporated in each suction unit and is connected to a suction element having a suction pipe arranged in the suction unit. The focused air sucked through the suction element through the suction unit is The suction opening is discharged from the suction device, and the outlet opening of each suction passage is located facing the opening of the suction pipe at the connection point, and the suction element has a guide and holding means, and suction is performed via the holding means. It relates to a type in which the unit is held and fixed to each focusing element.

  A wide variety of configurations are known in practice, and replaceable suction units are used in focusing elements, for example suction drums with perforations. The focusing element usually has a suction slit which, on the one hand, is connected to the suction passage and on the other hand is located opposite the part of the suction drum with perforations. The suction passage of the suction drum is connected to the suction pipe in the assembled state, and the suction air is guided to the central suction portion connected to the negative pressure source through the suction pipe.

  In a device of the above type known from DE 10145444 A1, for example, the suction insert used therein is first brought into an intermediate position via a guide between the suction drums for insertion into the suction drum. From the intermediate position, it is moved to the predetermined working position side by side into the inner chamber of each suction drum. The cover with the passage is then closed, whereby the suction insert is locked in its working position. Both suction passages of the suction insert are connected via a cover passage to a housing which is likewise formed as a passage, through which suction air is discharged to the central suction part. In the apparatus shown, three connections are required between the suction passage of the suction insert, the passage of the cover and the housing. However, each connection point between individual passages may be non-sealable, and as a result, ambient air containing foreign matter may be sucked in from the surroundings of the device, which causes scattered fibers called fly to be sucked in the corresponding points. There will be contamination and deposition. Further, the fiber portion may reach the suction passage at the non-sealable portion. Furthermore, due to such non-sealability, the negative pressure is reduced in the suction slit region, and ultimately the suction work in the suction drum is reduced. In order to avoid such disadvantages, the disclosed solution requires the installation of a sealing element, which makes the device more complex and costly. Furthermore, the sealing element needs to be periodically checked for its function. Furthermore, it has been found that the air guide through the passage of the cover is not optimal and air turbulence can occur inside the passage.

  In order to improve the known arrangement, in the suction device proposed in DE 102005044967A1, the suction passage of the suction unit is directly connected to the suction pipe (without an intermediate passage). In this case, the suction pipe has two separate round suction passages at its ends, both suction passages being combined into one common suction pipe. The suction element is moved to or removed from its operating position via a support plate provided on the suction pipe and a guide provided on the support plate. With such a configuration, one of the connecting points can be saved compared to the known configuration described first. Furthermore, this configuration can improve the air guide inside the suction device. However, even with this solution, it is still necessary to take action in order to sufficiently isolate or seal the connection point to the ambient air at the connection point that still exists. For example, this solution also requires the provision of corresponding sealing elements in the area of the connection points, which likewise makes these transition points complex or expensive and requires regular maintenance.

DE10145444A1 DE102005044967A1

  The object of the present invention is therefore to eliminate the disadvantages of the known solutions, eliminate the need for additional sealing elements in the area of the connection, guarantee an optimal air guide inside the suction device and handle it easily. It is to provide a suction device that can.

  In order to solve this problem, according to the configuration of the present invention, in the suction device of the type described at the beginning, the outflow opening of the suction unit has one flange closed in a square shape with a flat contact surface. The abutment surfaces are aligned with each other at a common connection point and are in contact with the flat abutment surface of the common one opening formed in the square shape of the suction pipe and closed around the flange. Is the outflow opening of the suction unit, completely covering the opening of the suction pipe, and held by the contact surface of the suction pipe with a pressing force through the holding means.

  The concept of “a flat abutment surface closed around” means that the rectangular opening is surrounded by a surface that is itself closed. Sufficient sealing surface that separates the suction device from the surroundings by the flat (also closed per se) surface of the flange, which is in contact with the flat abutment surface of the suction tube opening under the action of the pressing force Is obtained in the region of the connection location. Furthermore, the suction unit can be easily and quickly installed and removed.

  Furthermore, in another aspect of the present invention, the suction element and the holding means in the region of the contact surface of the suction pipe are covered with the uncovered outer surface of the flange of the suction unit at the lock position of the holding means. Molded. With this construction, an additional sealing surface is obtained which extends completely around the outer surface directed towards the outside of the flange. That is, despite the large sealing surface, even if non-sealability occurs in the region, the fiber fly fibers existing around the suction device reach 90 ° in the flange region to reach the suction device. It will be necessary to carry out this change. This makes it possible to obtain an additional barrier that makes it difficult for contamination to enter the area of the suction device at this connection point.

  In order to obtain additional separation means on the outer face of the flange, in another aspect of the invention, the suction element is provided on the side spaced from the narrow side of the rectangular opening of the suction pipe. The outer surface of the suction unit facing the web, at least partly, is in contact with the web in the locked position.

  In another aspect of the present invention, in order to generate a pressing force acting on the flange at a position where the flange is attached and to ensure that the contact surface of the flange contacts the contact surface of the opening of the suction pipe, The outer surfaces of the suction unit flanges which occupy the locking positions and face each other extend at an angle of less than 90 ° with respect to the respective abutment surface of the flanges, and the holding means have a central web The central web is provided with a free edge extending at an acute angle, and the edge engages between the opposed outer surfaces of the flange in the locked position.

  In the mounted state, the opposite outer surfaces of the flange are formed in a wedge shape, such outer surfaces cooperating with the wedge-shaped edge of the holding element, On the one hand, a clamping force is generated between the abutment surfaces, and on the other hand, a wedge action causes a force via the holding element, which forces the opposing surfaces of the flange away from each other. Press. As a result, the outer side facing the outer side of the flange, which is located on the opposite side of the outer side of the flange facing each other, is pressed against the web provided on the side of the opening. Thus, the flange, and thus the suction unit respectively connected to the flange, is firmly locked and fixed to the suction drum in that position.

It is a side view which shows the spinning location of a ring spinning machine provided with the draft device unit of the twin draft device (Zwillingsstreckwerk) and the connection location comprised like this invention. FIG. 2 is an enlarged view of two focusing devices positioned side by side as viewed from the direction of arrow X in FIG. 1. It is sectional drawing along the NN line | wire of FIG. It is a partial view which shows the turning location of a flap seeing from the direction of arrow Y of Drawing 2a. It is a figure which expands and shows a part of FIG. It is the figure seen from the direction of the arrow W of FIG.

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

  In FIG. 1, a spinning point 1 of a spinning machine (ring spinning machine) is shown in a side view together with one of two draft device units 2 located side by side of a cylinder draft device 2z. The draft device unit 2 includes an entrance roller pair 3, an intermediate roller pair 4, and an exit roller pair 5. Each one of the aprons is wound around the intermediate rollers of the intermediate roller pair 4 and guided, and each of these aprons is held at a position shown in the figure surrounding a cage (Kaefig) (not shown). The upper rollers of the roller pairs 3 to 5 are formed as pressing rollers and are rotatably supported via a shaft by a pressing arm (not shown) that is rotatably supported.

  The lower rollers of the roller pairs 3 to 5 are coupled to a driving device (not shown). In this case, an individual drive device can be used, or another drive mode (gear, toothed belt, etc.) can be used. The pressing roller or its apron is driven by friction via the driven lower roller. Since the circumferential speed of the roller pair 4 is somewhat higher than the circumferential speed of the roller pair 3, the fiber material (sliver L) supplied to the draft device unit 2 is between the inlet roller pair 3 and the intermediate roller pair 4. Pre-drafted. The main draft of the fiber material L is performed between the intermediate roller pair 4 and the outlet roller pair 5, and in this case, the outlet roller pair 5 has a significantly higher peripheral speed than the intermediate roller pair 4. The outlet roller pair 5 comprises a converging device VV in the illustrated embodiment.

  The focusing device VV consists of a suction drum 6 driven via a shaft 8. A pressure roller 9 that forms a clamp spot P1 together with the suction drum 6 is disposed in correspondence with the suction drum 6. As can be seen from the enlarged view of FIG. 2, the suction drum 6 and the suction drum 6 a disposed coaxially with the suction drum 6 include an opening OE disposed around the suction drum 6. A clamp roller 7 (also called a twist-preventing roller) is connected to the pressure roller 9, that is, behind the pressure roller 9, and the clamp roller 7 is in contact with the suction drum 6; 6a. A clamping point P is formed together with the suction drum 6; 6a. A suction zone Z is located between the clamp location P1 and the clamp location P. In this suction zone Z, the fiber material V supplied from the clamp location P1 is focused by the influence of the intake air. This focusing process is generally known and has already been disclosed in prior art documents. Therefore, the detailed explanation about this is omitted here.

  Above the suction zone Z, a cover 13 is provided, which serves for air guidance during the focusing process.

  The converged yarn G fed downward through the clamp point P is supplied to a ring spinning machine schematically shown through a yarn guide 43. The ring spinning machine includes a ring 39 and a rotor 40, and the yarn G is wound around a winding tube 41 to form a cup 42. The ring 39 is fixed to a ring frame 44, and this ring frame 44 moves up and down during the spinning process.

  In order to generate suction air in the area of the focusing zone or suction zone Z of each suction drum 6, 6 a, suction units 10, 10 a are arranged inside the suction drum, It can be seen from the enlarged view of FIG. 2 viewed from the direction X in FIG. In FIG. 2, the inlet roller pair 3, the intermediate roller pair 4, the pressing roller 9, and the clamp roller 7 are omitted in order to make the drawing easy to see. The suction unit 10 of the suction drum 6 has a suction slit (suction opening) 11, and this suction slit 11 faces the area where the opening OE is arranged around the suction drum 6 inside the suction drum 6. Is located.

  The suction slit 11 is connected to a suction passage 12 provided inside the suction unit 10, and the suction passage 12 opens at an outflow opening O <b> 1 of a flange F <b> 1 provided in the suction unit 10. A separate suction drum 6 a is provided on the shaft 8 coaxially with the suction drum 6, and this suction drum 6 a is provided with a suction unit 10 a that is arranged in a mirror image with respect to the suction unit 10. It has been. In this case, the suction unit 10a has a suction slit 11a, and this suction slit 11a opens into the suction passage 12a. The outflow opening O2 of the suction passage 12a is disposed in a flange F2 coupled to the suction unit 10a.

  In particular, as can be seen from FIG. 3, which is an enlarged view of FIG. 2, the flanges F1 and F2 are in contact with the contact surface A of the suction pipe 22 at the contact surfaces A1 and A2 when the suction units 10 and 10a are attached. Yes. The flanges F1 and F2 are in direct contact with each other and are in contact with the contact surface A. In this case, the outer surfaces FG oriented so as to face each other are positioned immediately adjacent to each other. The outer side surfaces FG are inclined by an angle c with respect to the respective contact surfaces A1; A2 to form a wedge-shaped free space K having an angle b. A central web 26 enters the free space K in the assembled position, and the central web 26 is fixed to a flap (holding means) 17, and the flap 17 can pivot about an axis 18. Is attached to the suction element 15. The central web 26 in this case has an edge 27 which engages the wedge-shaped free space K with an angle b. The suction pipe 22 is fixed to the suction element 15.

  Further, a guide 16 is fixed to the suction element 15, and the guide 16 has a slide rail 14 mounted at a distance from each other. The suction units 10 and 10a are moved to the operation position shown in FIG. 3 via the guide web 21 in the guide 16 attached to the suction units 10 and 10a via the slide rails 14. A similar embodiment of such a guide web is also disclosed, for example, in DE102005044967A1.

  The pivotable flap 17, which serves as a holding means for the suction units 10, 10a, has a locking body 28 at its free end, which is in the closed position of the guide 16 in the closed position. Engage and hold the flap 17 in this locked position in this position under a predetermined preload. At this time, pressure is simultaneously applied to the outer surface FG of the flanges F1 and F2 via the edge 27, thereby generating a pressing force on the oblique outer surface FG, and this pressing force is applied to both flanges F1 and F2. Acts in the direction of separating the two from each other. However, this separation is prevented by the webs 32 and 33, and these webs 32 and 33 are provided in the region on the narrow side of the rectangular opening O in the region of the side portion of the contact surface A. That is, the outer surfaces F of the flanges F1 and F2 are pressed against the webs 32 and 33 by the pressing force, whereby the flanges F1 and F2 or the suction units 10 and 10a coupled to the flanges F1 and F2 are axially positioned at the positions. It is fixed to the shaft 8 of the suction drums 6, 6a. This can be seen in particular from FIG. 2a (cross section NN). A web 31 is disposed below the webs 32 and 33, and the web 31 is connected to the webs 32 and 33. The web 31 covers the lower outer surface F of the flanges F1 and F2.

  In particular, as can be seen from the partial view of FIG. 2b, which is an enlarged view of part of FIG. 2a, the upper outer face F and the part of the outer face F of the side part of the flanges F1, F2 are appropriately shaped flaps. 17 is covered. In this case, webs 23 and 24 are provided on the flap 17 connected to the shaft 18, and both webs 23 and 24 cover the outer side surface F of the side portions of the flanges F1 and F2 until the webs 32 and 33 are reached. Yes. The shaft 18, that is, the shaft 18 on which the flap 17 is arranged so as to be pivotable about it, is fixed to the suction element 15. As can further be seen from FIG. 2b, the central web 26 fixed to the flap 17 extends over the entire length of the outer face FG. This ensures a seal in the region between the inner outer faces FG, even if the outer faces FG have a slight gap between them due to the pressing force that separates them. The suction tube 22 has a tapered end 46 that opens into a circular tube end 47. The pipe end 47 is provided with a flange 48, through which the suction pipe 22 is received and supported in the groove 50 of the bearing element 30. The bearing element 30, usually made of rubber, is fixed to the machine frame MR via an annular groove 49. In order to assist the mounting of the pipe 22 in the bearing element 30, the bearing element 30 is provided with an introduction auxiliary EF, and this introduction auxiliary EF extends in a shield shape over almost a half circumference of the pipe 22. Connected to the pipe end 47 of the suction pipe 22, another pipe 34 is fixed to the bearing element 30, and this other pipe 34 is connected to a central suction passage 37 via a coupling device 35. . This suction passage 37 is connected to a negative pressure source UP.

  The attachment and locking of the suction units 10, 10a is very simple and can be carried out quickly and without problems. In this case, the suction units 10 and 10a are connected to each other on the guides 16 in the slide rails 14 through the guide webs 21 fixed to the suction units 10 and 10a, as shown in FIG. 2 (or FIG. 3). It is moved to the indicated position, and this movement is performed until the contact surface A1; A2 contacts the contact surface A. Then, the flap 17 still occupying the open position is pivoted about the shaft 18 to the locking position shown in FIG. 4, at which time the locking body 28 is locked in the notch 29. And on the other hand, the edge 27 of the central web 26 is moved between the outer sides FG of the flanges F1, F2. On the one hand, a pressing force acting on the flanges F1 and F2 is generated through the central web 26 toward the abutment surface A1, and on the other hand, the flanges F1 and F2 are webs on the side of the suction element 15. It is pressed toward 32,33. As a result, the flanges F1 and F2 are also fixed at the positions of the suction units 10 and 10a, and the suction passages 12 and 12a and the inner chamber of the suction pipe 22 are separated from the outside in the region of the connection point KS. By surrounding the outer surface F of the flanges F1, F2 by the webs 31, 32, 33 and the webs 23, 24 fixed to the flap 17, an additional sealing surface closed in the area of the flanges F1, F2 Is born.

  DESCRIPTION OF SYMBOLS 1 Spinning place, 2 Draft device unit, 2z Cylinder draft device, 3 Inlet roller pair, 4 Intermediate roller pair, 5 Outlet roller pair, 6,6a Suction drum, 7 Clamp roller, 8 shaft, 9 Press roller, 10, 10a Suction Unit, 11, 11a Suction slit, 12, 12a Suction passage, 13 Cover, 14 Slide rail, 15 Suction element, 16 Guide, 17 Flap (holding means), 18 shaft, 21 Guide web, 22 Suction pipe, 23, 24 Web , 26 central web, 27 edge, 28 lock body, 29 notch, 30 bearing element, 31, 32, 33 web, 34 pipe, 35 coupling device, 37 central suction passage, 39 ring, 40 rotor, 41 winding pipe , 4 2 cups, 43 thread guide, 44 ring frame, 46 end, 47 pipe end, 48 flange, 49 annular groove, 50 groove, A, A1, A2 contact surface, b, c angle, EF introduction assistance, F outside Side, F1, F2 flange, FG outer side, G thread, K free space, KS connection location, L fiber material, sliver, MR machine frame, OE opening, O opening, O1, O2 outflow opening, P, P1 clamping location, UP negative pressure source, V fiber material, VV focusing device, Z suction zone

Claims (4)

Suction device for sucking focused air from two replaceable suction units (10, 10a) in twin draft device (2z) of spinning machine (2) for focusing fiber material (V) in aerodynamic manner Wherein the fiber material (V) is guided through each one suction zone (Z) by rotating focusing elements (6, 6a) located opposite each other and with perforations (OE), The suction units (10, 10a) arranged on the focusing elements (6, 6a) are provided with suction openings (11, 11a), and the suction openings (11, 11a) are connected to the respective suction units (10, 10a). A suction pipe (22) connected to the suction passage (12, 12a) built in) and disposed in the suction unit (10, 10a) The concentrated air sucked through the suction unit (10, 10a) is discharged from the suction device through the suction element (15), and is connected to the ment (15). The outflow openings (O1, O2) are located facing the opening (O) of the suction pipe (22) at the connection point (KS), and the suction element (15) is connected to the guide (16) and the holding means (17). The suction unit (10, 10a) is held and fixed to each focusing element (6, 6a) via the holding means (17),
The outlet opening (O1, O2) of the suction unit (10, 10a) has one flange (F1, F2) each closed in a square with a flat abutment surface (A1, A2), The abutment surfaces (A1, A2) are arranged side by side at a common connection point (KS) and are flattened around the common one opening (O) of the suction pipe (22) formed in a square shape. The flange (F1, F2) is the outflow opening (O1, O2) of the suction unit (10, 10a) and the opening (O) of the suction pipe (22) is completely in contact with the contact surface (A). The suction device is held by the contact surface (A) of the suction pipe (22) with a pressing force through the holding means (17).   The suction element (15) and the holding means (17) in the region of the contact surface (A) of the suction pipe (22) are connected to the flange (F1) of the suction unit (10, 10a) at the lock position of the holding means (17). , F2). The suction device according to claim 1, wherein the suction device is shaped such that the uncovered outer surface (F) is covered.   The suction element (15) has webs (32, 33) provided on the sides spaced from the narrow side of the rectangular opening (O) of the suction pipe (22), The outer surface (F) of the flanges (F1, F2) of the suction units (10, 10a) located side by side, facing the web (32, 33), at least partly on the web (32, 33), 3. The suction device according to claim 2, wherein the suction device is in contact in a locked position.   The outer surfaces (FG) of the flanges (F1, F2) of the suction unit (10, 10a) that occupy the lock position and face each other are the contact surfaces (A1, A2) of the flanges (F1, F2), respectively. The retaining means (17) has a central web (26), the central web (26) forming an acute angle (b). A free edge (27) extending, said edge (27) engaging in a locked position between the opposite outer faces (FG) of the flanges (F1, F2). The suction device described.

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