Tow feeding apparatus

Abstract: A tow feeding apparatus which requires no incessant observation, shortens the reset time when tow is wound around pinch rolls for feeding thereof into a case and safely operable is provided, which apparatus comprises guide rolls (5) for leading a tow (4) to a winding roll (6) or pinch rolls (8,9); a winding roll apparatus which is provided between said guide rolls and pinch rolls, that is at a normal position (6A), for winding up a tow around a winding roll (6) at the time of wrapping trouble of said pinch rolls apparatus, comprising a winding roll, a driving motor for driving said roll; a pinch rolls apparatus for feeding said tow from the guide rolls (5) through said winding roll apparatus into a case; a transporting means (11) for said winding roll apparatus to go over said pinch rolls apparatus from said normal position (6A) to a reset position (6D) behind the pinch rolls apparatus at the time of wrapping trouble; a cutter (7) for shearing the tow provided at the tow route before said pinch rolls apparatus; an exchanger of said pinch rolls apparatus for another one; a detector (16) for detecting wrapping of a tow around the pinch rolls; and control means for receiving a signal from said detector (16), actuating said cutter (7), said driving motor for driving the winding roll (6), stopping the pinch rolls apparatus, driving said exchanger for exchanging the pinch rolls apparatus for another one and said transporting means (11) for moving the winding roll apparatus from said normal position (6A) to the reset position (6D), starting the pinch rolls apparatus at the same time as stopping the winding roll apparatus, and returning the winding roll (6) to said normal position (6A).

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a tow feeding apparatus. More particularly, it relates to a tow feeding apparatus wherein an incessant watching of the tow fed into a case through pinch rolls is made unnecessary, a resetting time of the tow is shortened when a trouble of the tow winding around the pinch roll occurs and a safe operation is assured. 2. Description of the Related Art Melt-spinning of general-purpose synthetic fibers such as those of polyesters, polypropylene, etc. has generally been carried out by extruding a molten polymer through a number of spinning nozzles to obtain a number of filaments, collecting the filaments in a form of a tow which is then stored in a case. Fig. 2 shows a schematic view illustrating a conventional apparatus for feeding a tow into a case. In the figure, a number of filaments 2 extended from spinning nozzles 1 are cooled and drawn by a take-up roll 3 and collected to form a tow 4. The tow 4 is then fed into a case 12 via guide rolls 5 by means of pinch rolls, that is a pair of rolls 8 and 9 rotating at a high speed. The total denier of tow is generally as large as several thousands to several hundred thousands deniers in order to raise productivity. The feeding conditions of pinch rolls 8, 9 have been carefully set by choosing the nip pressure thereof and the speed ratio thereof to guide rolls 5 or by choosing spinning oils, etc. However, due to single filament break or wrapping of single filaments in the tow around the rolls, a wrapping trouble of a tow around the pinch rolls often occurs during operation. Once the wrapping around the pinch rolls 8, 9 has occurred, the pinch rolls 8, 9 are stopped in operation, and then a tow is wound around a winding roll 6 via a tow-passing route E by hand or an air sucker; followed by removing tow wastes wrapped on the pinch rolls, changing a tow-passing route to a route F by hand, and again starting the pinch rolls as well as stopping the winding roll. According to the conventional apparatus, once a wrapping trouble on the pinch rolls 8, 9 has occurred, they have to be stopped in operation and the wrapped tow wastes-have to be removed. Further, when the pinch rolls 8, 9 are stopped late, the tow stored in the case have been also wrapped on the pinch rolls, when wrappings of tow on the whole of rotating bodies occur, all rotating parts such as takeup rolls 3 and guide rolls 5 have to be stopped. For returning such a state to a normal one, it has been necessary to remove the wrapped wastes on the rotating parts. Further, when a time for resetting a tow is prolonged, the extrusion of a molten polymer has to be stopped. Thus, until the resetting has been attained, a rather long time has been required to result in wasting a large quantity of tow. Further, since an extraordinary load has been applied to the gear part in the gear box of the pinch rolls due to the wrapped tow, the gears have often been broken. Thus, an incessant watching has been required for minimizing the wrapping around the pinch rolls, much labor has been required for the reset operations which accompany a danger. Japanese patent application laid-open No. Sho 53-134916 discloses a process wherein, when a tow of filaments is encased in a can, the tow is reeled using an air-suction type tow-sucking apparatus. According to this process, the tow is sucked into the sucking apparatus, which apparatus is automatically moved downstream of a reel, and then the tow is reeled onto the reel. According to this apparatus, when the tow is sucked, the sucking force is so weak that suction miss is liable to occur, or it is necessary to lower the rotating speed of a roll on which the tow is wrapped. Furthermore, this reference does not detect filaments wrapped in the apparatus or automatically deal with such wrapping. Hence, by means of the disclosed apparatus, it is virtually impossible to carry out tow change rapidly and certainly. SUMMARY OF THE INVENTION The object of the present invention is to provide a tow feeding apparatus provided with means for rapidly removing a tow wrapped around pinch rolls, and rapidly resetting a tow with a high safety. According to the present invention there is provided: a tow feeding apparatus having pinch rolls for feeding a tow into a case, which comprises: guide rolls for leading a tow to a tow transfer means or pinch rolls; a tow transfer apparatus which normally assumes a normal position between the said guide rolls and pinch rolls; a pinch rolls apparatus for feeding the said tow from the guide rolls into the said case; and a transporting means for moving the tow transfer apparatus over the pinch rolls apparatus from the said normal position to a reset position behind the pinch rolls apparatus when tow accidentally becomes wrapped on the pinch rolls; Characterised in that; the tow transfer means is a winding roll, and the tow transfer apparatus comprises a driving motor for driving the said winding roll; and the tow feeding apparatus comprises a cutter for shearing tow situated upstream of the said pinch rolls apparatus; an exchanger for exchanging the said pinch rolls apparatus for another pinch rolls apparatus; a detector for detecting when tow becomes wrapped around the pinch rolls; and control means for receiving a signal from the said detector, actuating the cutter, energising the driving motor so as to drive the winding roll, stopping the pinch rolls apparatus, driving the exchanger to exchange the pinch rolls apparatus for another, driving the transporting means to move the winding roll apparatus from the normal position to the reset position, starting the pinch rolls apparatus at the same time as stopping the winding roll apparatus, and returning the winding roll to the said normal position. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a schematic view illustrating the whole of an apparatus of the present invention. Fig. 2 shows a schematic front view illustrating a conventional apparatus. Fig. 3 shows a schematic front view of the whole of an apparatus of the present invention. Fig. 4 shows a schematic plan view taken along lines 4-4 of Fig. 3. Fig. 5 shows a fragmentary side view taken along lines 5-5 of Fig. 3. Fig. 6 shows a fragmentary side view illustrating a pinch rolls apparatus provided with a guide bar. Fig. 7 shows a schematic view illustrating a cutter provided with an air-jet means. Fig. 8 shows a schematic view illustrating one embodiment of a winding roll used in the present invention. Fig. 9A shows a fragmentary schematic view of a pinch roll of a gear type having a corrugated surface, and Fig. 9B shows a fragmentary shematic view of a pinch roll of a cage-type. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS The present invention will be described in more detail referring to the accompanying drawings. The apparatus of the present invention comprises the following components: guide rolls 5 for leading a tow 4 to a winding roll 6 or pinch rolls 8, 9; a winding roll apparatus 25 which is provided between said guide rolls 5 and pinch rolls 8, 9, that is at a normal position 6A, for winding up a tow around a winding roll 6 at the time of wrapping trouble of said pinch rolls apparatus, comprising a winding roll 6, a driving motor 21 for driving said roll and a pusher 22 optionally provided for moving said winding roll 6 in the axial direction thereof by a predetermined length; a pinch rolls apparatus for feeding said tow from the guide rolls 5 through said winding roll apparatus 25 into a case 12; a transporting means 11 for said winding roll apparatus 25 to go over said pinch rolls apparatus from said normal position 6A to a reset position 6D behind the pinch rolls apparatus at the time of wrapping trouble; a cutter 7 for shearing the tow provided at the tow route before said pinch rolls apparatus; an exchanger of said pinch rolls apparatus for another one; a detector 16 for detecting wrapping of a tow around the pinch rolls 8, 9; and control means for receiving a signal from said detector 16, actuating said cutter 7, said driving motor 21 for driving the winding roll 16 (and the pusher 22), stopping the pinch rolls apparatus, driving said exchanger for exchanging the pinch rolls apparatus for another one and said transporting means 11 for moving the winding roll apparatus from said normal position 6A to the reset position 6D, starting the pinch rolls apparatus at the same time as stopping the winding roll apparatus 25, and returning the winding roll 6 (with the pusher 22) to said normal position 6A. A series of guide rolls 5 are provided for leading the tow 4 from spinning nozzles 1 to the winding roll 6, and further to the pinch rolls 8, 9. A tow guide 20 is preferably provided at the tow inlet side of the winding roll 6. This guide 20 has a traverse means for traversing the tow within the width of the winding roll 6 in order to wind up a tow uniformly on the roll. The winding roll 6 of the present invention may have a smooth plain surface without any projection and depression (see Figs. 4 and 5) or have a surface consisting of two different surface sections as shown in Fig. 8, one of them having a smooth surface section 23 substantially without any projection and depression and the other having a fluted surface section 24 as a rough surface section. The smooth surface section 23 is positioned so as to include the end part of the winding roll 6, while the fluted surface section 24 is positioned at the other part as shown in Fig. 8. The smooth surface section is subjected to electroplated chrome finish or electroplated satin finish. The tow is wound around the fluted surface section 24 of the roll when the winding roll 6 is pushed by a predetermined length, and the tow is passed through the smooth surface section 23 to the pinch rolls apparatus when the winding roll 6 is returned to the original position. The winding roll 6 also may have a collar 19 (Fig. 8) for inhibiting a tow from winding around the shaft of a motor 21. Referring to Fig. 5, the winding roll apparatus 25 consists of a winding roll 6, a driving motor 21 for driving the roll 6 and a pusher 22 for moving the winding roll 6 in the axial direction by a predetermined length. The motor 21 for driving the winding roll 6 is installed on a pedestal 43 by the medium of wheels 42 which is supported on rails provided on the pedestal 43. Further, the rear part of the motor 21 is connected to a pusher 22 consisting of an air cylinder for pushing forward or pulling back the motor 21. The detector 16 for detecting wrapping of a tow around the pinch roll may be a sensor for detecting a yarn wrapping trouble or a tow wrapping trouble, a means for detecting an abnormal current value of the driving motor of the pinch roll apparatus or a detecting means for image information from an image sensor at the time of the above trapping troubles, and further both the detecting means may be provided. The cutter 7 used in the present invention is automatically actuated by a signal sent from the detector 16 for the wrapping trouble of the tow around the pinch rolls 8, 9. The cutter may be fixed onto the tow route so that the blade of the cutter shears the tow at the time of a wrapping trouble or may be awaited at the side of the tow route at the time of a normal operation and pushed out onto the tow route by means of a cutter-moving means like a pusher 15 (Fig. 3) at the time of a wrapping trouble. In order to help the tow cut by the cutter 7 to wind around a winding roll 6, air-jet means for jetting an air to the cutter may by provided as shown in Figs. 3 and 7. In Fig. 7, a cutter blade 7A and a support 7B are joined together by means of a hinge joint 40. The support 7B has an inlet 14 of air communicated to the air-jet means. A tow A is passed between the cutter blade 7A and the support 7A, and at the time of cutting, it is sheared by a hinging motion of the cutter blade 7A. The cutter and the air-jet means may be actuated by means of an electromagnetic value. Further, it is possible to arrange cutters 7 corresponding to the number of pinch rolls apparatuses. Further, the cutter may be provided on a housing 13 or independently of the housing 13. The transporting means 11 may be any means capable of transporting the winding roll apparatus between the normal position 6A and the reset position 6D. A typical example of the means comprises a platform 33 laterally installed over said pinch rolls apparatus; a truck 17 provided on said platform 33 by means of wheels 32, an elevator 44 supported to said truck 17, for moving said winding roll apparatus upward or downward, and driving means of said truck 17 and said elevator 44 between said normal position 6A and said reset position 6D of the winding roll apparatus. The elevator 44 for moving the winding roll apparatus 25 upward or downward comprises an air cylinder 26 and a piston 27 incorporated thereinto. The piston 27 is fixed to the winding roll apparatus 25 at the lower end thereof. The air cylinder 26 is supported onto a supporting plate of a truck 17. A guide 28 the upper end of which is fixed to the truck 17 is engaged with a guide rail 29 which is provided vertically and fixed to the winding roll apparatus 25. The guide 28 is also supported to the air cylinder 26. The guide 28 and the guide rail 29 inhibit the lateral movement or vibration of the winding apparatus 25 when it is moving. The winding roll apparatus 25 can ascend or descend in accordance with the movement of the piston 27 of the air cylinder 26. The platform 33 is laterally supported on columns 46 over the pinch rolls apparatus and in parallel with the tow route (Fig. 5). The truck 17 provided with the elevator 44 of the winding roll apparatus 25 is supported on the platform 33 by means of wheels 32. A motor 30 as a driving source for traversing the elevator 44 is provided at the elevator 44. A pinion 31 attached to the shaft of the motor 30 is in mesh with a rack 47 fixed to the platform 33 (Fig. 5). The pinch rolls apparatus comprises pinch rolls 8 and 9 for feeding a tow into a case 12, a driving motor 51 joined to the shaft of the pinch rolls, a housing 13 of the motor 51, a turntable 48 on which the driving motor 51 is installed and pins 72 for fixing the turntable (Fig. 4). The turntable 48 is rotatable around a shaft 52 by means of a motor 49 through a bevel gear 50. The other set of pinch rolls apparatus (pinch rolls 8A, 9A and Motor 51A) is installed on the same turntable so that it is exchangeable with the former by rotating the turntable. As an exchanging method of the pinch rolls apparatus, besides the above method of employing a turntable, a method of running pinch rolls apparatuses on a rail one after another at the time of exchange may be employed. The number of pinch rolls apparatuses is preferred to be larger, but two thereof are usually employed from the point of economy. Examples of pinch rolls 8 and 9 are those of metal rolls each having a flat surface, those of a gear type (Fig. 9A), those of a cage type having bars bridging the ridges of corrugated side plates (Fig. 9B), and the like. The width of the pinch roll 8 is usually broader than that of the pinch roll 9. A guide bar 18 is preferably provided on the housing 13 at the forward side of the pinch roll 9 as shown in Figs. 3, 4 and 6. This guide bar 18 make it possible to inhibit the tow from wrapping around the shaft of the pinch rolls 8, 9 and guide the tow along an exact tow route via the upper surface of the pinch roll 8 having a broader width to the winding roll 6, when the winding roll 6 descends from the position 6C to the position 6D as shown in Fig. 3. The guide bar 18 may be fixed to the housing 13. The control means of the present invention comprise an actuator of the cutter 7 for shearing the tow actuated by a signal from said detector 16 for detecting said wrapping of the tow on the pinch rolls, an actuator of said winding roll apparatus 25, actuated by a signal from the detector 16, a stopping means for stopping said winding roll apparatus 25 after cutting of the tow, a controller of said exchanger of the pinch rolls apparatus which functions so that the pinch rolls apparatus is exchanged for another one at the same time as the winding roll apparatus 25 is stopped, a controller of said elevator and said driving means of said truck 17, which is actuated after the shearing of the tow and functions so that said winding roll apparatus 25 moves upward from the backward side of the pinch rolls apparatus, that is a normal position 6A, then moves laterally over said pinch rolls apparatus along the tow route, add further moves downward to the forward side of the pinch rolls apparatus, that is a reset position 6D, a starting means for starting the pinch rolls apparatus when the winding roll apparatus reach to said reset position 6D, and a stopping means for stopping the winding roll apparatus 25 at the same time as starting of the pinch rolls apparatus, a controller for returning the winding roll 6 to the original position after removing of a waste on the winding roll. Control systems of the respective devices of the present invention may include those for controlling rotating speeds of pinch rolls, a winding roll, guide rolls and the like, and those for positional relationship, actuation order relationship, and a time relationship of the respective devices. Some of the above control systems may be incorporated into sequence process controls or microcomputers. The air cylinder 26 may be replaced by a hydraulic cylinder and the like. Next, the function of the present invention will be described referring to the embodiments of Figs. 3 to 5. When a tow is normally fed in the pinch rolls 8 and 9, the tow 4 from a take-up roll 3 is introduced into a series of guide rolls 5 and then passed through a smooth surface section 23 of the winding roll 6 rotating at a normal position 6A as a normal roll position. Then the tow is fed to the pinch rolls 8 and 9 through a tow route A and stored in a case 12. Tow guide 20 provided before the winding roll 6 has been stopped and the tow is passed through the middle part of the tow guide (Fig. 1). The rotating speeds of the respective guide rolls 5 are the same as that of the take-up roll 3 or set to slightly higher values in the order of the pinch rolls 8, 9, the winding roll 6 and the guide roll 5. When the tow has wrapped around the pinch rolls 8, 9 by accident, a signal received from a detector 16 is treated by a controller, a cutter-moving means 15 is actuated, and a cutter 7 is pushed forward and enters the tow route A. At the same time, a pusher 22 in the winding roll apparatus 25 (Fig. 5) is actuated and the winding roll 6 is pushed forward so that it changes the tow route from the smooth surface section 23 to the fluted surface section 24 (Fig. 8). At the same time, an electromagnetic valve of an air-jet means is opened to jet air from the inlet 14 to the tow. Further, the cutter 7 is actuated by the electro-magnetic valve to shear the tow A, and at the same time, tow is wound around the fluted surface section 24 of the winding roll 6. The air-jet means helps the tow A to wind around the winding roll 6. Further, a tow guide 20 is actuated and the tow starts to traverse in the width direction of the winding roll 6, whereby the tow is uniformly wound around the winding roll 6. After a certain time lag, the pinch rolls 8, 9 is stopped in rotation, whereby the first stage automatic operation for resetting a tow is finished. Next, after the tow cutting, right and left pins 72 for fixing the turntable 48 are relieved (Fig. 4). Thereafter, a driving motor 49 for turning the turntable is driven, and the turntable 48 is slowly rotated by an angle of 180° by the medium of gears 50 around the shaft 52 of the turntable (Fig. 3) so that the pinch rolls 8, 9 are exchanged for the others 8A, 9A (Fig. 4). The pins 72 for fixing the turntable 48 are set again and the tow feeding apparatus is in the state of awaiting until the setting of the winding roll apparatus mentioned below is finished. The winding roll 6 having a tow wound therearound ascends slowly up to a position of 6B (Fig. 3) together with the tow guide 20 by actuation of the air cylinder 26 of the elevator 44 (Fig. 5). Thereafter, a traverse motor 30 for traversing the track 17 (Fig. 5) is driven to rotate the pinion 31 on the rack 47 fixed to the platform 33 whereby the winding roll apparatus reaches a position of 6C (Fig. 3) where the torn guide (20) is stopped in motion and the tow takes a passageway to 6C. Thereafter, the winding roll 6 descends slowly by actuation of the air cylinder 26 of the elevator to reach a position of 6D (Fig. 3). Then the tow is guided by a guide bar 18 to exactly passes through the top surface of the pinch roll 8 having a broader width than the other pinch roll 9, and is wound around the winding roll 6 having moved to the position of 6D and the tow route takes a passageway of 6D. At the same time when the winding roll 6 reaches the position of 6D, the pinch rolls 8, 9 start to rotate by a signal from a controller. At the same time, the winding roll 6 is stopped and the tow passes between the pinch rolls 8 and 9 and fed into the case. Thereafter, the tow left between the case 12 and the winding roll 6 and the yarn wastes wound around the winding roll 6 are cut by an automatic cutter or by a scissor and removed. Thereafter a signal of returning to the normal roll position (6A) of the winding roll 6 is sent to a controller, whereby the winding roll 6 is pulled inward by actuation of the pusher 22 (Fig. 5), and the winding roll apparatus 25 moves from the position 6D to the positions 6C, 6B and 6A in this order by the operation of the elevator 44 and the truck 17 for ascending or descending, and traversing the winding roll apparatus 25. Thus, the winding roll apparatus 25 returns to the normal roll position 6A where the roll is stopped to round and stationary. Further, the yarn wastes wrapped around the pinch rolls 8A, 9A on the back side of the housing 13 (Fig. 4) are cut by a cutter and removed. Thus, the total operations of the tow resetting are completed. In the present invention, it goes without saying that operations of ascending, descending, rotation, starting and stopping of the winding roll, traverse of the truck, and the like operations or various operations of the pinch rolls apparatus may be carried out manually in part. In the present invention, the foregoing description has been made referring to the embodiment using a winding roll 6 having two different roll surface sections, but the tow may be wound around a winding roll having a whole smooth surface or may be wound up around a winding roll without any tow guide. According to the embodiments of the present invention, when a tow has been wrapped around the pinch rolls by trouble, it is possible to reset a tow automatically with an exchange of the pinch rolls for another one to make an incessant watching or monitoring of a tow unnecessary and lessen the labors of operators. A time required for resetting a tow to the pinch rolls is saved by the automatic operation to reduce labors for removing yarn wastes. For example, while according to a conventional apparatus, about 15 to 25 minutes or longer have been required for removing yarn wastes wrapped around the pinch rolls and the like, according to the apparatus of the present invention, about 50 seconds to 2 minutes are sufficient, so the production efficiency has increased notably. Further, according to the embodiment of the present invention, by arranging the tow guide 20 with the winding roll, it is possible to wind up a tow as far as the utmost of the effective width of the winding roll. Thus, even in the case of a tow having a large fineness, the time required for resetting a tow is sufficient so the resetting can be carried out safely. Further, according to the embodiment of the present invention, by using a winding roll having a smooth surface section and a rough surface section, the former being for passing a tow to the pinch rolls and the latter being for winding up a tow therearound, it is possible to completely carry out winding up of the tow around the winding roll without any failure. According to the present invention, by shortening the rest time of the apparatus, it has been possible to reduce the quantity of yarn wastes from several hundreds Kg in the case of a conventional apparatus down to several tens Kg, for example. Further, when a tow has been wrapped around pinch rolls by trouble, at least several operators are required for resetting them, whereas according to the apparatus of the present invention, even only one operator could have reset the apparatus. The apparatus of the present invention can be broadly applied to a handling process for not only a tow of synthetic fibers prepared by melt-spinning, but also a crimped tow having a large fineness of several thousands to several hundred thousands deniers, and the like material such as multifilament, cotton yarns, tape yarn, fiber rod, etc.

Claims: A tow feeding apparatus having pinch rolls (8,9) for feeding a tow (4) into a case (12), which comprises: guide rolls (5) for leading a tow to a tow gripping means or pinch rolls (8,9); which tow gripping means normally assumes a position (6A) between the said guide rolls (5) and pinch rolls (8,9); a pinch rolls apparatus (8,9,51) for feeding the said tow from the guide rolls (5) into the said case (12); and a transporting means (11) for moving the tow gripping means over the pinch rolls apparatus (8,9,51) from the said normal position (6A) to a reset position (6D) behind the pinch rolls apparatus (8,9,51) when tow accidentally becomes wrapped on the pinch rolls (8,9); Characterised in that; the tow gripping means is a winding roll (6) and a driving motor (21) is provided for driving the said winding roll (6) to wrap the tow thereon; and in that the tow feeding apparatus comprises: a cutter (7) for shearing tow situated upstream of the said pinch rolls apparatus (8,9,51); an exchanger (48, 50, 52) for exchanging the said pinch rolls apparatus (8,9,51) for another pinch rolls apparatus (8A,9A,51A); a detector (16) for detecting when tow becomes wrapped around the pinch rolls (8,9); and control means for receiving a signal from the said detector (16), actuating the cutter (7), energising the driving motor (21) so as to drive the winding roll (6), stopping the pinch rolls apparatus (8,9,51), driving the exchanger (48, 50, 52) to exchange the pinch rolls apparatus (8,9,51) for another one, driving the transporting means (11) to move the winding roll (6) from the normal position (6A) to the reset position (6D), starting the pinch rolls apparatus (8,9,51) at the same time as stopping the winding roll (6), and returning the winding roll (6) to the said normal position (6A). A tow feeding apparatus according to claim 1, wherein said transporting means (11) comprises a platform (33) laterally installed over said pinch rolls apparatus (8,9,51); a truck (17) provided on said platform (33) by means of wheels (32); an elevator (44) supported by said truck (17), for moving said winding roll (6) upward or downward; and driving means (30) for driving said truck (17) and said elevator (44) between said normal position (6A) and said reset position (6D) of the winding roll (6). A tow feeding apparatus according to claim 2, wherein said elevator (44) comprises an air cylinder (26) which is connected to winding roll apparatus (25) which supports the winding roll (6) so as to move the winding roll apparatus (25) upward and downward, a guide (28) fixed to said truck (17) or said air cylinder (26) and a guide rail (29) fixed vertically to the winding roll apparatus (25). A tow feeding apparatus according to claim 2 or 3, wherein said driving means (30) of said truck (17) comprises a rack (47) and pinion connected to said platform (33) and truck (17) respectively and a driving motor (30) for driving the pinion connected to the truck (17). A tow feeding apparatus according to claim 1, 2, 3 or 4 comprising a pusher (22) for moving said winding roll (6) in the axial direction thereof by a predetermined length; and wherein said winding roll (6) has a smooth surface section (23) and a rough surface section (24) in the axial direction of the roll, so that the tow is wound around said rough surface section (24) when the winding roll (6) is pushed forward by a predetermined length, and the tow is passed over the smooth section (23) of the winding roll (6) to the pinch rolls apparatus (8,9,51) when the winding roll (6) is returned to the original position. A tow feeding apparatus according to any preceding claim, wherein said pinch rolls apparatus (8,9,51) comprises pinch rolls (8,9) for feeding the tow into the case (12), a driving motor (51) for driving the pinch rolls (8,9), the upstream roll (8) of said pinch rolls (8,9) having a broader surface than that of the downstream roll (9) of said pinch rolls (8,9), and a guide bar (18) for preventing the tow from feeding into the pinch rolls (8,9) when it is wound around the winding roll (6) at the time of resetting. A tow feeding apparatus according to any preceding claim, wherein said exchanger (48, 50, 52) has a turntable (48) on which a pair of said pinch rolls apparatuses (8,9,51) are provided in an exchangeable manner. A tow feeding apparatus according to any preceding claim, wherein said detector (16) for detecting wrapping of the tow is a means for detecting an abnormal current value of the driving motor (51) of the pinch rolls (8,9) or a means for detecting image information from an image sensor. A tow feeding apparatus according to any preceding claim, wherein said cutter (7) is fixed in the path of the tow route or is provided to the side of the tow route and is moved into the tow route upstream of the pinch rolls apparatus (8,9,51) by means of a pusher when tow becomes wrapped around the pinch rolls (8,9). A tow feeding apparatus according to any preceding claim, wherein an air-jet means is provided at the cutter (7) for winding a tow around the winding roll (6). A tow feeding apparatus according to claim 5, wherein the winding roll (6) has a guide (26) for passing the tow within the breadth of the winding roll during operation of the winding roll (6). A tow feeding apparatus according to any preceding claim, wherein a secondary cutter is provided for cutting the tow left between the pinch rolls (8,9) and the winding roll (6) when situated at said reset position (6D). A tow feeding apparatus according to any preceding claim, wherein said control means comprises an actuator for the cutter (7) actuated by a signal from said detector (16) for detecting said wrapping of the tow on the pinch rolls; an actuator for the said winding roll (6), actuated by a signal from the detector (16) for detecting said wrapping of the tow; a stopping means for stopping said winding roll (6) after cutting of the tow; a controller for the said exchanger (48, 50, 52) of the pinch rolls apparatus (8,9,51) which functions so that the pinch rolls apparatus (8,9,51) is exchanged for another pinch rolls apparatus (8A,9A,51A) at the same time as the winding roll (6) is stopped; a controller for the said elevator (44) and said driving means (30) of said truck (17), which is actuated after the shearing of the tow and functions so that said winding roll (6) moves upward from the normal position (6A) of the pinch rolls apparatus (8,9,51), then moves laterally over said pinch rolls apparatus (8,9,51) along the tow route, and further moves downward to the reset position (6D) downstream of the pinch rolls apparatus (8,9,51); a starting means for starting the pinch rolls apparatus (8,9,51) when the winding roll (6) reaches the said reset position (6D), and a stopping means for stopping the winding roll (6) at the same time as starting the pinch rolls apparatus (8,9,51); a controller for returning the winding roll (6) to the original normal position (6A) after removing of a waste on the winding roll (6).

Inventors: HAMADA KENJI, SASAKI KATSUTOSHI, HAMADA, KENJI, SASAKI, KATSUTOSHI
Applicants: CHISSO CORP, CHISSO CORPORATION
Application year: 1990
Main classification: B65H54
IPC codes: B65H63, D01D7, B65H54