US3841574A

US3841574A - Winding device for synthetic threads

Info

Publication number: US3841574A
Application number: US00175227A
Authority: US
Inventors: E Lenk; M Greb
Original assignee: Barmag Barmer Maschinenfabrik AG
Current assignee: Oerlikon Barmag AG
Priority date: 1970-09-01
Filing date: 1971-08-26
Publication date: 1974-10-15
Anticipated expiration: 1991-10-15
Also published as: GB1366143A; FR2102058A5; CH528605A; DE2043246A1

Abstract

A winding head for the winding freshly spun and/or stretched synthetic threads running continuously at a high speed onto a bobbin securely held by means of a chuck which bobbin and its winding are driven by a drive roller in steady rotation, and a fluid operated system for operating the chuck, for moving and pressing of the drive roller against the bobbin, and for the braking of the chuck shaft.

Description

United States Patent Lenk et al.

[45.1 Oct. 15, 1974 WINDING DEVICE FOR SYNTHETIC THREADS [75] Inventors: Erich Lenk; Hansjochen Busch, both of Remscheid; Manfred Greb, Huckeswagen, all of Germany [73] Assignee: Barmag Barmer Maschinenfabrik Aktiengesellschaft, Wuppcrtal, Gcrmany [22] Filed: Aug. 26, 1971 [2]] Appl. No: 175,227

[30] Foreign Application Priority Data Sept. 1, 1970 Germany 2043246 [52] US. Cl. 242/18 DD, 242/18 A, 242/464 [51] Int. Cl B65h 54/20, B65h 54/44 [58] Field of Search 242/18 A, 18 DD, 46.4

[56] References Cited UNITED STATES PATENTS 3,001,732 9/1961 Hill 242/18 A 3,165,274 1/1965 De Priest 242/18 A 3,355,116 11 /1967 Conrad 242/18 DD 3,498,551 3/1970 Brincr ct al,.... 242/464 X 3,517,891 6/1970 Zcis ct al. 242/464 3,575,357 4/1971 Enneking 242/18 DD 3,642,217 2/1972 Sistarc 242/18 DD 3,661,334 5/1972 Graf 242/18 DD Primary Examiner-John W. Huckert Assistant ExaminerMilton S. Gerstein Attorney, Agent, or FirmJohnston, Keil, Thompson & Shurtleff [5 7] ABSTRACT A winding head for the winding freshly spun and/or stretched synthetic threads running continuously at a high speed onto a bobbin securely held by means of a chuck which bobbin and its winding are driven by a drive roller in steady rotation, and a fluid operated system for operating the chuck, fior moving and pressing of the drive roller against the bobbin, and for the braking of the chuck shaft.

14 Claims, 9 Drawing Figures PMENIEU I W 3. 841 .574

sum 1 or 4 INVENTORSB ERICH LENK HANSJOCHEN BUSCH MAN FR ED GREB ATT'YS PATENTEDBBHSIW 3.841.574

sumzor 4 INVENTORS: ERICH LENK HANSJOCHEN BUSCH hkl XNFRED GR EB g0lgzzh Maw, wwafjwag PAINInum I 51974 summon A 5 I N F QIINVENTORS:

BE "H KNW A E EWW LO R F m NY R EHM 1 WINDING DEVICE FOR SYNTHETIC THREADS INTRODUCTION The invention aims, in view of rising salaries and ever scarcer personnel, to reduce the number of working hours to accomplish windings of synthetic polymer threads or yarns. Simultaneously damage to the machine or individual parts of the machine caused by faulty manual operations are avoided.

The technical problem underlying the invention consists in designing a winding head of the type mentioned at relatively low cost, at least to such an extent for an automatic operation wherein operating errors with harmful effects upon the winding head or the sensitive synthetic yarn winding are avoided.

In turning away from the measures hitherto used in the winding of freshly spun synthetic threads it is proposed according to the invention that the system allocated to the winding head for the execution of the individual working steps required in the bobbin change be driven pneumatically and that the winding head according to one first embodiment by means of only one pneumatic switching-on impulse is automatically set into operation and by means of only one pneumatic switch-off pulse operation is automatically stopped. According to another embodiment, the system is equipped additionally with a carrying device having two chucks which are alternately in operation and with an auxiliary drive for the mounting of an empty bobbin. It is operable for the purpose of the bobbin change by means of only one pneumatic switching pulse. By means of logically linked pneumatic control elements operated by switching pulses or a switching pulse, the systems perform the individual working steps required in the bobbin change in a technologically expedient sequence.

Through use of the winding head according to the invention, manual operation is restricted at least to the extent that only the removal of the finished winding and the sliding on of a new empty tube or bobbin need be performed. For the initiation of operation and for the setting out of operation of the winding head, only the corresponding controls have to be triggered. The controls cover precisely the range or zone of the winding head operation, to which a considerable portion of the manual operation hitherto was used, and in which thedanger of harmful straining of the machine or of individual parts, of a time loss or of damage to the delicate winding through faulty hand operation is especially great.

The pneumatic operation of the winding head arid the pneumatic control for the starting and for the switching off of the winding head assure that the individual operations proceed free of harmful strains and harmful inertia forces for the sensitive winding and the machine.

THE INVENTION In developments of the invention, the switch-on pneumatic pulse can be triggered at will by hand, by a bobbin changing arrangement or by astop operated in the slipping of the bobbin onto the chuck. The pneumatic switch-off pulse is triggered by hand, by a thread detector, a winding detector or a device directly or indirectly detecting the thickness of the winding, in particular an end switch or a time switching mechanism.

Further, the invention makes possible in an advantageous manner a gentle movement of the drive roller onto the bobbin, as well as the influencing of the contact pressure force between bobbin and drive roller in the course of the winding process. These characteristics avoid deformations of the winding and excessively high pressure on the inner layers of the winding. This takes place, on theone hand, through the fact that, to the arrangement for the traveling and pressing-onof the drive roller against the bobbin, there are provided path-dependent and/or time-dependent control elements. They, in the operation of the traveling and pressing-on movement against the bobbin, bring about a stepwise or continuous reduction of the feed movement velocity, and also through the fact that in the system for the traveling and pressing-on of the drive roller against the bobbin there are time-dependent and/or path-dependent control elements which bring about in the course of the bobbin travel a stepwise or continuous change, preferably in reduction of the contact pressure force.

Expediently the control for the setting out of operation of the full bobbin has a device for the standstill monitoring of the chuck shaft over which the system for the relaxing of the chuck can be switched on only after standstill of the chuck shaft has occurred. The

standstill monitoring, as stated in the following description, can take place pneumatically or through devices responding to the braking retardation.

The supplying of the winding head with compressed air of different pressures for the control and the drive can take place through known arrangements such as chokes or pressure regulators which are connected to a compressed air line and are connected to each individual winding head. There is, however, the further problem of regulatingor controlling from a central point the course of individual process or movements, such as, forexample, the velocity, acceleration with retardation of the starting movement of the drive roller ontothe bobbin or the level of the contact pressure force. For this reason, the compressed air supply takes place through several compressed air mains with differing pressures adjustable in common for several winding heads. This saves the expenditure of time and personnel required for individual settings.

For a winding head equipped for the additional acceleration of the bobbin change with an additional drive of the chuck shaft for the mounting of the emptybobbin, this drive, too, is pneumatic and is switchable on through the switch-on pulse and switchable off via a time relay. Because of the short switch-on duration and the low switch-on frequency this drive can be relatively small and, in the process, highly loaded.

Further, in a winding head with an additional drive for the chuck shaft, for the avoidance of slippage and an excessively high contact pressure force between pneumatic drive roller and bobbin, the drive can be switchable on or switchable off over a device directly or indirectly detecting the torque.

The advantages of the invention consist in a rapid op eration of the winding head, gentle on the product and the machine, largelyfree of operational errors, with smooth, shockfree and jerk-free running of the move ments and processes, with shortest control paths and approximately inertia-free switchings and controls. The winding head according to the invention is distinguished, further, by a space-saving construction with a simple, sturdy casing not weakened by bearings and openings. Its control operates largely free of wear. The parts subject to wear are commercially available. Through the simplified operation and the automatic control, personnel is saved, and the time needed for a bobbin change or for the remedying of thread breakage orfalse winding is shortened. Tending of the winding head by operators during the winding process, for example, for the modification of the control pressure force between drive roller and bobbin, is eliminated.

The use of logically linked pneumatic control elements makes it possible to provide only a few operating elements and to arrange these on the head side of the winding head. It is feasible to arrange the individual winding heads parallel to their longitudinal axis close together and to lay out the machines on which the winding heads are used with corresponding spacesaving effect.

THE DRAWINGS Embodiments of the invention and its manner of operation are described in detail with the aid of the drawings, wherein:

FIG. I is a perspective view of the winding head;

FIG. 2is' a schematic view of a system of the pneumatic control, switching and drive elements used with a winding head according to FIG. 1;

FIGS. 3 and 4A are schematic views of pneumatic controls used for monitoring the system at standstill;

FIGS. 4, 5 and SA are section views showing details of the braking unit and standstill monitoring devices of the winding head;

FIG. 6 is a front elevation of a winding head and auxiliary components; and

FIG.'6A is a detail view in cross-section of the coupling used in FIG. 6.

THEILLUSTRATED EMBODIMENTS The winding head of FIG. 1 consists of a vertically movable carriage 10, which carries the traverse device 20 as well as the steadily driven drive roller 30 and of a stationary, rotatably borne chuck 40 for the reception and mounting of the bobbin B and its winding.

The drive roller 30 can be moved against the bobbin by lowering of the carriage and is pressed thereagainst under the weight of the carriage. The carriage 10 is securely connected with a pneumatic cylinder piston system 50. The force exerted in the case of pressure action on the cylinder 51 (FIG. 2) by the piston 52 counteracts the carriage weight.

The chuck shaft 41 is braked by a pneumatic brake system 60. The brake is applied by pressure acting on the piston 61 (FIG. 2) and released on pressure relaxation by the springs 62 (FIG. 2).

The chuck 40 is released by loading of a pressure rod 42 aligned with its axis and on relief of the pressure rod is tensioned under the force of a spring (not represented). The pressure force for the force-loading of the pressure rod is exerted by compressed air charging of the device 70. The rod 73 of the piston 71 of the device 70 moves away from the pressure rod 42 on pressure relief under the force of the spring 72.

For supplying the compressed air there are provided three compressed

air line systems

81, 82, 83 with different pressures of, for example, 2, 3, 6 atmospheres gauge pressure. The sources for the air of these pressures is provided centrally for several winding stations.

The schematic representation of the illustrated embodiment is made by means of circuit or switching symbols whose actual form in apparatus technology can be various and can take place through elements with mechanically moved parts (for example, piston valves) or by elements without mechanically moved parts (for example, pneumatic flow control elements).

For initiating the operation or stopping of the bobbin, there is in each case a

pneumatic pressure pulse

84 or 87 to the pneumatic storage member 101. Thereby there is triggered the corresponding movement of the carriage 10, the adjustment of the contact pressure force between drive roller and bobbin, the tensioning or releasing of the brake 60 as well as of the chuck 40.

The construction of the embodiment in detail is given from the following description of its manner of functioning:

For the triggering of the pneumatic pressure pulse 84 for the stopping of the bobbin there serve the

pneumatic switches

92, 93, 94, which are actuated by hand (switch 92) or by a thread or winding monitor (switch 93) or, when the bobbin is filled, by the carriage 10 (94) switch. The pulse released by the switches 92 to 94 is passed to

pneumatic control elements

121 and 122, which in each case show an output signal if only one of the input signals a or b is present, as pneumatic pulse 84 to the pneumatic storage element 101. The storage element 101 converts this time pressure pulse 84 into a time-independent pneumatic pressure signal 85. This pressure signal has the following effect:

a. The carriage with the drive roller moves off the bobbin into its end position Ill, namely, by the fact that the piston 52 ofthe cylinder piston system 50, through displacement of the pneumatic amplifier setting member 151 in position a, is acted upon from the air line system 83 with a pressure of, for example, 6 atmospheres gauge pressure.

b. The brakes 60 are applied by the fact that the pistons 61, through shifting of the pneumatic amplifier setting member 154 in position a, are acted upon from the air line system 83 with a pressure of, for example, 6 atmospheres excess pressure. For this the pressure signal 85 is conducted over the pneumatic delayaction member 142. Its pneumatic choke and pneumatic storer are adjusted or pre-set in such a way that the pneumatic output signal 86 brings about the shifting of the pneumatic setting member 154 and causes the compressed air acting on the piston 61 with time lag of sufficient duration to assure that the bobbin and drive roller are no longer in contact.

c. The device 70 for the relaxing of the chuck 40 by means of the pressure rod 42 (FIG. 2) is set in operation after standstill of the chuck and the bobbin thereon by shifting of the pneumatic amplifier setting member 155 in position a. Pressure action on the piston 71 is applied from the air line system 83 with a pressure of, for example, 6 atmospheres gauge pressure, via the pneumatic standstill monitoring unit 16, when the standstill monitoring unit is activated by the pneumatic pressure signal 86. The manner of functioning and switching of the standstill monitoring 16 is described further below.

For the releasing of the pneumatic pressure pulse 88 for the setting in operation of the empty bobbin, the

pneumatic switching element 91 is operated. The pneumatic time pressure pulse 87 is converted in the pneumatic storage member 101 into a pneumatic timeindependent pressure signal 88. The signal 88 is given to the input b of a pneumatic control element 113 which frees an exhaust outlet c when the input signals a and b are present. Since the control element 113 is acted upon with the pressure signal 86 in-its input a,,activation of its input b with the pneumatic pressure signal 87 leads to the exhaust action and to the breakdown of the pressure signal 86 to give the following effects:

a. The bobbin is clamped in on the chuck and b. The brake is released under the force of the springs 62, since the pneumatic output signals of the pneumatic control elements 111 and 112, which only occur when the provided inputs have a signal, likewise drop off withdecline of the pressure signal 86,, whereby the

pneumatic setting members

155 and 154 are shifted under the force of a restoring spring into air exhaust position b.

c. The carriage descends under its weight, since the air in cylinder piston'system 50is being exhausted by the shifting, delayed in the pneumatic choke of the pneumatic delay member 142, of the pneumatic setting member 151. Through the delayed shifting the bobbin is prevented from being set in revolution by the drive roller before the brake is released and thebobbin clamped in place.

As soon as the carriage has moved out of position III into position II it operates the pneumatic switch 95, which leads to a stepwise switching over of the air pressure in the cylinder chambers 51 to give a gentle setting of the drive roller on the bobbin and with a predetermined time lag to the reduction of the contact pressure force between drive roller and bobbin. For this the pneumatic pulse 89 emanating from the switch 95 is converted in the pneumatic storage element 102 into a time-independent pneumatic pressure signal 810. This pressure signal 810 through the

pneumatic control elements

131 and 132, which in each case give a pneumatic signal at c only if no pneumatic input signal a is present, is converted into the pneumatic pressure signal 811 and is used for the shifting of the pneumatic amplifier setting member 152. Through this shifting the cylinder piston system 50 is switched over to an air pressure of, for example, 2 atmospheres gauge pressure and thereby the carriage movement is braked. In the second place, the signal 810 is converted over the pneumatic delay member 141 and the pneumatic control element 113 into the pneumatic signal 812. The pneumatic delay member 141 is adjusted in such a way that the signal 812 occurs only when the bobbin has reached the peripheral velocity of the drive roller. With the pressure signal 812, the pneumatic amplifier setting member 153 is shifted, so that the cylinder piston system 50 is acted upon from the air line system 82 with superatmospheric pressure of, for example, 3 atmospheres gauge pressure, and the drive force between bobbin and drive roller is correspondingly reduced. Simultaneously, the pressure signal 812 is given to the input of the pneumatic control element 132, whose pneumatic output signal 811 thereby drops off and makes possible the restoring of the pneumatic setting member 152 under spring force.

The pneumatic monitoring unit 16 according to FIG. 3 consists of a slit diaphragm 163, which turns with the chuck shaft 41. On the one side of the slit diaphragm there is a pair of nozzles 162, each connected and supplied via the compressed air input A (FIG. 2) and the adjustable pneumatic choke 161 by the air pressure signal 86 (FIG. 2). On the other side of the slit diaphragm 163 there is opposite each of the nozzles 162 a pickup nozzle 164 in series circuit with of an optional pneumatic amplifier (not represented), a pneumatic choke or throttle 165, a pneumatic storer 166, a pneumatic control element 167land a pneumatic control element 169. The pneumatic output B of the standstill monitoring unit .(FIG. 2) is acted upon by air pressure when one of the air pressure signals 168 is present. The slit diaphragm 163 is constructed in such a way, and the nozzles 162 are staggered relative to one another in such a way, that in any arbitrary position of the slit diaphragm163, the jet of one nozzle 162 can pass through the slit diaphragm. Thechokes 165, the storers 166, the control elements 167 as well, possibly, as the amplifiers, are laid out in such a way thata control pressure signal 168 for the acting upon of pneumatic control element 169 is triggered only if the slit diaphragm is approximately at rest. On arrival of the pneumatic start signal, which has as a consequence the dropping out of the air pressure signal 86 and the exhaust or relief of the pneumatic input A (FIG. 2), the pneumatic storers 166 are immediately coupled with

thelpneumatic elements

1610, 1611 and the pneumatic outputs 1612. The pneumatic signals 168 and the pneumatic output signal B decline, and the bobbin is clamped on the chuck.

It is also possible in this standstill monitoring to construct the slit diaphragm as well as the after-engaged nozzles, chokes, storers and other pneumatic control elements in such a way that an air pressure build-up takes place only during the rotation of the slit diaphragm, and toy use this pressure for the shifting of the pneumatic switching element 176 (FIG. 4A). The pneumatic switching circuit according to FIG. 4A is stillto be described.

For the generation of the control pneumatic pressure si r al in the output B of the standstill monitoring unit (l- IG. 2) with the slit diaphragm at a standstill, there can also be utilized the phenomenon that the time-back pressure bounce effect of the slit diaphragm and thereby also the mean pressure in front of the nozzles 162 or of a corresponding nozzle is greater at standstill of the diaphragm than in rotation. If the slit diaphragm is to operate according to this principle, the pick-up nozzles 164 become unnecessary.

In the arrangement represented in FIG. 4 for the standstill monitoring, a rotary ring 1172 held by a spring rotates with the screw-threaded end 171 of the chuck shaft 41. The upper part of FIG. 4 shows the standstill monitoring with brake drum 173 and brake jaws 174 disengaged. The lower part of FIG. 4 shows the standstill monitoring with brake jaw 174 engaged. In braking the rotary ring 172 executes relative to .the chuck shaft 41 a rotary movement and thereby on the screw threaded end 171 an axial movement. Thereby the pneumatic switching element 176 (FIG. 4, 4A) is shifted. In this position, via the input A of the pneumatic monitoring unit (FIG. 4a) the pneumatic storer 1710 is charged via pneumatic control element 178. Aftei termination of the braking process the rotary ring l'lffmoves back into its starting position. The switching element176 returns automatically into its starting position, the pneumatic storer 1710 discharges via the pneumatic choke 1711 and the pneumatic output 1712 and in so doing, simultaneously gives a pneumatic shifting pulse 179 to the pneumatic control element 1713 which thereupon responds with the pneumatic pulse 1714 only if the pneumatic switching pulse 177 is not present. The pulse 1714 is then converted in the pneumatic storer 1715 into the time-independent air pressure signal 1716, which via output B (FIG. 2) leads to the shifting of the pneumatic amplifier settingmember 155 in the direction of relaxation of the chuck. On initiation of the pneumatic start signal 88 (FIG. 2) the storer element 1715 (FIG. 4A) is blocked.

In the standstill monitoring according to FIGS. 5 and 5a, the entire chuck braking arrangement 60 (FIGS. 1 and 2) with brake jaws 610, pistons 61, and cylinders 64 with the pivot pin 65 is rotatably bornein the bearing 611 coaxially with the chuck shaft 41. The turning rotation path is limited by the pivot pin 65 and the fixed pins 68. The braking device is held in its starting position by the tension spring 67. On engagement of the brakes, the braking device is deflected to the right. Thereby pivot pin 65 operates the pneumatic switching element 176 and after conclusion of the braking operation releases it again. Switching element 176 is switched for the operation of the cylinder unit 70, in one manner represented in FIGS. 2 and 4A.

FIG. 6 shows the section through an alternate form of winding head. As in the embodiment of FIGS. 1 and 2, a carriage 10 carries the traverse device and the steadily driven drive roller 30. The carriage is movable in'vertical direction. The drive roller can be applied, through lowering of the carriage 10, onto a bobbin located in working position on the chuck 40. The carriage as shown in FIGS. 1 and 2 is moved by means of a pneumatic cylinder piston system 50 which can be motivated with compressed air counter to the weight of the carriage. In deviation from the embodiment of FIG. 1 and FIG. 2, two chucks 40' and 40" are rotatably borne with their

chuck shafts

41 and 41" in a rotatable carrying device 200.

The carrying device 200 is swingable about the axle 203 by means of the pneumatic swinging drive 202 in each case through 180 continuously or also in alternating direction and controlled by means of the releasable lock control device 201. This consists of an air cylinder with piston 205, rod 206 and spring 204. The chuck 40 with the tube or bobbin situated on it is in the engagement range of the drive roller 30 and thereby in working position. The other chuck 40" is in rest or bobbin change position. It is situated with its brake disk 612" in the engagement range of a braking device 60 and with its coupling half 183" in the engagement range of the coupling half 182 of the drive 190. The brake disks 612 and the coupling halves I83, 183" are arranged in like manner at the end of each of the two

chuck shafts

41 and 41". Likewise in each of the chucks or chuck shafts there is a

pressure rod

42, 42". By pressing in this pressure rod the chuck is relaxed. On pressure relief of the pressure rod the chuck is tensioned under the force of a spring (not represented).

The drive 190 is a motor briefly highly overloadable, which is operated above its nominal load. The motor casing is constructed as a piston and conducted in axial direction of the motor in the fluid cylinder 181. The motor shaft is securely joined with the coupling half 182. The coupling half 182 is cup-shaped and has on its inner circumference teeth or ribs. The

coupling half

183, 183 is a shaft with a wheel correspondingly constructed with teeth or ribs. As long as the cylinder 181 is not acted upon by pressure, the two coupling halves 182 and183', 183" in consequence of the force of the spring 184, are in engagement with one another. By pressure action on the left pressure chamber of the cylinder 181 (FIG. 6A), the coupling half 182 is pressed with its face side 182 against the pressure rod 42' or 42". This leads to relaxation of the chuck 40" which the following working cycle occurs:

The cylinder 181 and thereby the pressure rod 42" is relieved from pressure, so that the chuck 40", on

which the empty tube is seated, is tensioned under the .force of a spring (not represented) to clamp against the winding tube or spool (not shown). The coupling halves 182 and 183", however, remain coupled. The brake 60 is released. Now the chuck 40 is set in motion by means of the auxiliary motor 190 and, namely, in such a way that the peripheral velocity of the empty bobbin approximates the peripheral velocity of the drive roller and of the thread yelocity. This acceleration requires a certain amount of time. After or shortly before the expiration of this time the carriage 10 with the drive roller 30 in high-speed rotation travels into its uppermost position. The releasable lock device 201 for the carrying device 200 is released by fluid pressure action on the piston 205 against the force of the spring 204 to retract the tip 207 of rod 206 from the tips recess seat 208 in the periphery of the carrying device 200 and the auxiliary drive 190 is decoupled by corresponding fluid pressure action on the cylinder 181 from the chuck 40" set in rotation. Now the carrying device 200 is swung by the pneumatic swinging drive 202 through and thereupon stopped upon pressure relief of the device 201 by means of movement by spring 204 of bolt 206 downwardly so that its tip seats in recess seat 209. Now the carriage 10 travels, first rapidly and then, shortly before contact with the bobbin, slowly into driving engagement with the empty bobbin on the chuck 40", which is in rotation and through contact by the drive roller, is brought to the peripheral velocity of the drive roller or thread velocity.

Through the swinging of the carrying device through l80 and its stopping in this position, the chuck 40 with the full bobbin has moved to rest position. Simultaneously the brake disk 612 of the chuck 40' has been brought into the range of action of the brake 60. The full bobbin, therefore, can be braked. The rotation of the chuck is sensed over one of the already described pneumatic standstill monitoring systems. After standstill of the chuck the casing of the auxiliary drive is driven forward in axial direction by fluid pressure relief of the cylinder 181 under the force of the spring 184, the coupling halves 182 and 183 are coupled and by pressure action on the left-hand pressure chamber of the cylinder 181 (FIG. 6A) the face side 182 of the coupling half 182 is pressed against the pressure rod 42, whereby the chuck is relaxed. Now the full bobbin can be drawn off, a new bobbin tube slipped on, and a new b'obbinchange can be carried out at the appropriate time.

An example of a chuck or mandrel used in winding devices with releasable bobbin-gripping members operated by a rod like rod 42 M42 is disclosedand illustrated in Elka U.S. PatuNo; 2,345,246. Conrad-U.S; Pat." No. 3,355,116 describes a pneumatic mechanism for 'raisingaand lowering the drive roller.

Itis thought that the invention and its numerous-attendant'advantages will be fully understood fromv the foregoing description, and it is obvious that numerous changes may'be made in the form, construction and arrangement of the several parts without zdepartingzfrom the spirit. or scope of the invention, .or sacrifieing any of its attendant advantages, the forms herein disclosed;-

being preferred. embodiments forthe purpose of illustrating :theinvention.-

Theinvention isclaimed as'follows:

1*. A winding head for the continuous winding at high velocity of freshly. spunorstretched, synthetic polymer filaments onto a" bobbin, which comprises rotatable chuck means having bobbin-gripping meansfor release ably-gripping a bobbin, a drive.rollerifor rotatably drivingasaid bobbin and the windingathereombobbin driveactuating means for bringing said driveroller'andisaid bobbin into driving contact, releasable'brakingmeans for braking said chuck means, respective pneumatic means for operating each of the; aforementioned? means, and pneumatic controlimeanshaving pneumatically-operated members which. are (A);activated by a single pneumatic starting pulse generated'by, said;pneumatic control means to (a); operate the pneumatic means of said bobbin gripping rmeansto grip a: bobbin, (=b)operate the pneumatic means for saidbobbin driveactuating means, and (c) operate the pneumatic means for the brakingmeans to releasesaid braking means and (B) activated by a single pneumatic stopping pulse generatedby said pneumatic control means to (a') operate the pneumatic means for. the braking means to apply the braking means, and" (b') after the bobbin comes to a standstill, operate the pneumatic means for the gripping means to release said bobbin-gripping means.

2. A winding device as claimed in claim 1, and said pneumatic control means having a plurality of alternate means for providing said single starting pulse including manually operated means and means automatically operated when an empty spool is exchanged on said chuck in place of a full spool, and a plurality of alternate means for providing said single stopping pulse including manually operated means and at least one of thread monitoring means, means monitoring the winding on the spool, and timer means.

3. A winding head as claimed in claim 1, said bobbin drive-activating means embodying control means for moving said drive roller toward said bobbin at a decreasing velocity during travel of said drive roller to its position of driving contact with said bobbin.

4. A winding head as claimed in claim 1, said control means including program control means operatively associated with the bobbin drive by said drive roller to reduce the pressing force therebetween in program responsive to the size of the winding.

5. A winding head as claimed in claim 1, an additional drive means for the chuck means for starting rotation of the chuck and an empty bobbin thereon before contact of the bobbin and rotating drive roller, and

. pneumatic means for activatingsaid additionaludrive means and operated by a manual switch.

6'. Aiwinding head as claimedin claim 1, additional drive means for rotatably driving said chuck meansand thechuck and bobbin thereon, and means responsive, to the rotational moment of said chuck means for auto matically switching saidadditional drive means onand off.

7. Awinding head as claimed in claim 1, an addi;

tional drive means for the chuck means for starting. r0; tation of the chuck and an empty bobbin thereonbefore contact of the bobbin and rotating drive roller, and pneumatic means for activating said additional drive means and operated bya timer means.

8. A winding head for the continuous winding at high, velocity of freshly spun or stretched, syntheric polymer filaments onto a bobbin, which, comprises rotatable chuck means having bobbin-gripping means for releas; ably gripping a bobbin, a drive roller for rotatablydriving saidqbobbin and the winding thereon, bobbindriveactuating means for bringing. said drive roller and said:-

bobbin into driving contact, releasable brakingmeans forbraking said chuck means, respective pneumatic means for operating each of i the aforementioned means, and-pneumatic control means having pneumatically-operated members which'aretA) activated by a single pneumatic startingpulse generated by said pneumatic control means to (a) operate the pneumatic meansof said bobbin-gripping means to grip a bobbin, (b);operate the pneumatic means for said bobbin driveactuating means, and( c) operate the pneumatic means for the braking means to release said braking means and (B) activated by a single pneumatic stoppingpulse generated by saidpneuma'tic control 'meanstota) operate the pneumatic means for the braking means to apply, the braking means, and (b') after the bobbin comestoeastandstill,operate the pneumatic meansfor the' -gripping' means to release-said bobbin-gripping when said braking means brings said chuck means sub:

stantially to or actually at a standstill.

9. A winding head as claimed in claim 8, said sensing means comprising a slotted diaphragm rotatable with the chuck, and air jet nozzle means directed toward said diaphragm to generate a signal by an air jet passing through said diaphragm to activate said chuckoperating means only when said diaphragm is substantially or actually at a standstill.

10. A winding head as claimed in claim 8, said sensing means being a mechanical means responsive to braking deceleration of said chuck means and operatively associated with said bobbin-gripping means.

11. A winding head as claimed in claim 10, said chuck means having a chuck shaft, said mechanical means comprising a member rotatably borne on the chuck shaft for relative rotation thereto, and spring means connecting said shaft and said member and urging said member against a stop surface rotatable with said chuck shaft to return said member to a posibraking means brings said chuck and the bobbin thereon substantially to a standstill.

12. A winding head as claimed in claim said chuck means having a chuck shaft, said mechanical ,means comprising a-member rotatably supported coaxially about said chuck shaft, and spring means yieldably restraining rotation of said member relative to said drive roller and said bobbin into driving contact, releasable braking means for braking said chuck shaft, respective pneumatic means for operating each'of the aforementioned means, and pneumatic control means having pneumatically-operated members which are (A) activated by a single pneumatic startingpulse to (a) operate the pneumatic means of said bobbin gripping means to grip a bobbin, (b) operate the pneumatic means for said bobbin drive-actuating means, and (c) operate the pneumatic means for the braking means to release said braking means for the bobbin the winding position, and (B) activated by a single pneumatic stopping pulse generated by said pneumatic control means to (a) operate the pneumatic means for the braking means to apply the braking means, and (b') after the bobbin comes to a standstill, operate the pneumatic means for the gripping means to release said bobbingripping means for the bobbin in the bobbin changing position.

14. A winding head for the continuous :winding at highvelocity of freshly spun or stretched, synthetic polymer filaments onto a bobbin, which comprises pivotable chuck-supporting means bearing at least two chucks rotatably mounted thereon, said chucks being movable by said supporting means between a winding position anda bobbin-changing position, each chuck having bobbin-gripping means for releasably gripping a bobbin, a drive roller for rotatably driving the bobbin and the winding thereon which are in said winding position, bobbin drive-actuating means for bringing said drive roller and said bobbin into driving contact, releasable braking means for braking said chuck shaft, respective pneumatic means for operating each of the aforementioned means, pneumatic control means having pneumatically-operated members which are (A) activated by a single pneumatic starting pulse to (a) operate the pneumatic means of said bobbin gripping means to grip a bobbin, (b) operate the pneumatic means for said bobbin drive-actuating means, and (c) operate the pneumatic means for the braking means to releasesaid braking means for the bobbin the winding position, and (B) activated by a single pneumatic stopping pulse generated by said pneumatic control means to (a) operate the pneumatic means for the braking means to apply the braking means, and (b') after the bobbin comes to a standstill, operate the pneumatic means for the gripping means to release said bobbingripping means for the bobbin in.the bobbin changing position, additional drive means for rotating the chuck bearing an empty bobbin placed thereon in the bobbinchanging position, and coupling means activating said additional drive means upon movement of said empty bobbin into said winding position from said bobbinchanging position. i I l=

Claims

1. A winding head for the continuous winding at high velocity of freshly spun or stretched, synthetic polymer filaments onto a bobbin, which comprises rotatable chuck means having bobbingripping means for releasably gripping a bobbin, a drive roller for rotatably driving said bobbin and the winding thereon, bobbin drive-actuating means for bringing said drive roller and said bobbin into driving contact, releasable braking means for braking said chuck means, respective pneumatic means for operating each of the aforementioned means, and pneumatic control means having pneumatically-operated members which are (A) activated by a single pneumatic starting pulse generated by said pneumatic control means to (a) operate the pneumatic means of said bobbingripping means to grip a bobbin, (b) operate the pneumatic means for said bobbin drive-actuating means, and (c) operate the pneumatic means for the braking means to release said braking means and (B) activated by a single pneumatic stopping pulse generated by said pneumatic control means to (a'') operate the pneumatic means for the braking means to apply the braking means, and (b'') after the bobbin comes to a standstill, operate the pneumatic means for the gripping means to release said bobbingripping means.

5. A winding head as claimed in claim 1, an additional drive means for the chuck means for starting rotation of the chuck and an empty bobbin thereon before contact of the bobbin and rotating drive roller, and pneumatic means for activating said additional drive means and operated by a manual switch.

6. A winding head as claimed in claim 1, additional drive means for rotatably driving said chuck means and the chuck and bobbin thereon, and means responsive to the rotational moment of said chuck means for automatically switching said additional drive means on and off.

7. A winding head as claimed in claim 1, an additional drive means for the chuck means for starting rotation of the chuck and an empty bobbin thereon before contact of the bobbin and rotating drive roller, and pneumatic means for activating said additional drive means and operated by a timer means.

8. A winding head for the continuous winding at high velocity of freshly spun or stretched, syntheric polymer filaments onto a bobbin, which comprises rotatable chuck means having bobbin-gripping means for releasably gripping a bobbin, a drive roller for rotatably driving said bobbin and the winding thereon, bobbin drive-actuating means for bringing said drive roller and said bobbin into driving contact, releasable braking means for braking said chuck means, respective pneumatic means for operating each of the aforementioned means, and pneumatic control means having pneumatically-operated members which are (A) activated by a single pneumatic starting pulse generated by said pneumatic control means to (a) operate the pneumatic means of said bobbin-gripping means to grip a bobbin, (b) operate the pneumatic means for said bobbin drive-actuating means, and (c) operate the pneumatic means for the braking means to release said braking means and (B) activated by a single pneumatic stopping pulse generated by said pneumatic control means to (a'') operate the pneumatic means for the braking means to apply the braking means, and (b'') after the bobbin comes to a standstill, operate the pneumatic means for the gripping means to release said bobbin-gripping means, said control means including sensing means for sensing the standstill state of said chuck and the bobbin thereon, and said bobbin gripping means being operatively associated with said sensing means to permit said bobbin-gripping means to release said bobbin only when said braking means brings said chuck means substantially to or actually at a standstill.

9. A winding head as claimed in claim 8, said sensing means comprising a slotted diaphragm rotatable with the chuck, and air jet nozzle means directed toward said diaphragm to generate a signal by an air jet passing through said diaphragm to activate said chuck-operating means only when said diaphragm is substantially or actually at a standstill.

11. A winding head as claimed in claim 10, said chuck means having a chuck shaft, said mechanical means comprising a member rotatably borne on the chuck shaft for relative rotation thereto, and spring means connecting said shaft and said member and urging said member against a stop surface rotatable with said chuck shaft to return said member to a position for activating said chuck-operating means as said braking means brings said chuck and the bobbin thereon substantially to a standstill.

12. A winding head as claimed in claim 10, said chuck means having a chuck shaft, said mechanical means comprising a member rotatably supported coaxially about said chuck shaft, and spring means yieldably restraining rotation of said member relative to said chuck shaft.

13. A winding head for the continuous winding at high velocity of freshly spun or stretched, synthetic polymer filaments onto a bobbin, which comprises pivotable chUck-supporting means bearing at least two chucks rotatably mounted thereon, said chucks being movable by said supporting means between a winding position and a bobbin-changing position, each chuck having bobbin-gripping means for releasably gripping a bobbin, a drive roller for rotatably driving the bobbin and the winding thereon which are in said winding position, bobbin drive-actuating means for bringing said drive roller and said bobbin into driving contact, releasable braking means for braking said chuck shaft, respective pneumatic means for operating each of the aforementioned means, and pneumatic control means having pneumatically-operated members which are (A) activated by a single pneumatic starting pulse to (a) operate the pneumatic means of said bobbin gripping means to grip a bobbin, (b) operate the pneumatic means for said bobbin drive-actuating means, and (c) operate the pneumatic means for the braking means to release said braking means for the bobbin the winding position, and (B) activated by a single pneumatic stopping pulse generated by said pneumatic control means to (a'') operate the pneumatic means for the braking means to apply the braking means, and (b'') after the bobbin comes to a standstill, operate the pneumatic means for the gripping means to release said bobbin-gripping means for the bobbin in the bobbin changing position.

14. A winding head for the continuous winding at high velocity of freshly spun or stretched, synthetic polymer filaments onto a bobbin, which comprises pivotable chuck-supporting means bearing at least two chucks rotatably mounted thereon, said chucks being movable by said supporting means between a winding position and a bobbin-changing position, each chuck having bobbin-gripping means for releasably gripping a bobbin, a drive roller for rotatably driving the bobbin and the winding thereon which are in said winding position, bobbin drive-actuating means for bringing said drive roller and said bobbin into driving contact, releasable braking means for braking said chuck shaft, respective pneumatic means for operating each of the aforementioned means, pneumatic control means having pneumatically-operated members which are (A) activated by a single pneumatic starting pulse to (a) operate the pneumatic means of said bobbin gripping means to grip a bobbin, (b) operate the pneumatic means for said bobbin drive-actuating means, and (c) operate the pneumatic means for the braking means to release said braking means for the bobbin the winding position, and (B) activated by a single pneumatic stopping pulse generated by said pneumatic control means to (a'') operate the pneumatic means for the braking means to apply the braking means, and (b'') after the bobbin comes to a standstill, operate the pneumatic means for the gripping means to release said bobbin-gripping means for the bobbin in the bobbin changing position, additional drive means for rotating the chuck bearing an empty bobbin placed thereon in the bobbin-changing position, and coupling means activating said additional drive means upon movement of said empty bobbin into said winding position from said bobbin-changing position.