US3805504A - Apparatus for pneumatically stopping spindle assemblies of a textile yarn processing machine in a predetermined position - Google Patents

Apparatus for pneumatically stopping spindle assemblies of a textile yarn processing machine in a predetermined position Download PDF

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Publication number
US3805504A
US3805504A US00310567A US31056772A US3805504A US 3805504 A US3805504 A US 3805504A US 00310567 A US00310567 A US 00310567A US 31056772 A US31056772 A US 31056772A US 3805504 A US3805504 A US 3805504A
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Prior art keywords
spindle
whorl
brake
brake shoe
yarn
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US00310567A
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English (en)
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G Franzen
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Palitex Project Co GmbH
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Palitex Project Co GmbH
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/04—Spindles
    • D01H7/22—Braking arrangements
    • D01H7/2208—Braking arrangements using mechanical means
    • D01H7/2233—Braking arrangements using mechanical means by suppressing the driving means, e.g. by declutching
    • D01H7/2241—Braking arrangements using mechanical means by suppressing the driving means, e.g. by declutching the belt being moved off the driven whorl
    • D01H7/225—Braking arrangements using mechanical means by suppressing the driving means, e.g. by declutching the belt being moved off the driven whorl and the spindle being braked simultaneously
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/007—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing for two-for-one twisting machines

Definitions

  • ABSTRACT An apparatus for automatically stopping rotation of a spindle assembly of a textile yarn processing machine in a predetermined position and which includes provision for facilitating the threading of a yarn end through the hollow axle of the spindle assembly.
  • the apparatus comprises brake means including a brake shoe mounted on a reciprocating piston and a braking surface on the whorl of the spindle for initially stopping rotation of the spindle, pneumatic control means for directing pressurized air between the brake shoe and braking surface to thereby at least partially release the brake means and permit the spindle to slowly rotate after it has been initially stopped, and means including an aperture in the braking surface of the spindle whorl for carrying away the air directed between the brake shoe and brake surface to thereby reestablish the brake means to stop the spindle in a predetermined position wherein the aperture is aligned with the brake shoe.
  • the air entering the aperture in the braking surface is directed outwardly through an outwardly directed channel in the spindle disc and which communicates with the hollow axle to thereby draw air through the hollow axle and thus facilitate the threading of the yarn end therethrough.
  • the above braking and pneumatic control means may be positioned at each spindle of the machine, or they may be mounted on a movable carriage which may be brought to a spindle requiring servicing.
  • the present invention relates to an apparatus for braking and stopping the rotation of a spindle assembly of a textile yarn processing machine, such as a twister, spinning frame or the like, in a predetermined position.
  • the stopping of the spindle is completed in two operations.
  • the spindle is braked by a conventional spindle brake, and concurrently the tension roller associated with the spindle whorl is withdrawn from the guide belt, such that the driving force of the belt acting on the whorl is greatly reduced.
  • the spindle is initially braked in this way, the spindle will come to rest in a random position.
  • the brake is next released temporarily, and the drive belt causes the spindle to start up once more with only a slight driving force.
  • the spindle can be brought to a stop in a predetermined position with only a slight force, for example magnetically or by a mechanically acting grip device (see German Patent No. 1,269,549 and U.S. Pat. No. 3,269,103). Since during this intermediate restarting of the spindle, only a small driving force acts on the spindle, the spindle may be quickly stopped in the desired predetermined position, for example, wherein the yarn passage channel opens outwardly toward the operator.
  • German Patent No. 1,289,470 discloses the concept of pneumatically threading a yarn through the hollow axle of a spindle, and wherein an air passage opens into the yarn channel of the thread feeder disc and forms an injector with the yarn channel.
  • the air passage communicates with a compressed air line, and when compressed air is blown in, a suction is developed in the hollow spindle axle through which the yarn is drawn from the feed package. More particularly, the yarn is passed over the upper end of the hollow spindle and directed downwardly therethrough where it is hurled outwardly by the compressed air passing through the yarn passage channel of the yarn feeder disc. The yarn is then guided upwardly so that its end can be attached to the take-up spool or can be. tied to the yarn of the takeup spool.
  • an apparatus which comprises a brake shoe which can be delivered pneumatically against a braking surface on a spindle whorl and which can be withdrawn in the opposite direction. Also, a compressed air outlet opens out through the braking surface of the brake shoe and is adapted to communicate with an inlet aperture which opens out in the braking surface of the spindle and which in turn communicates with the outwardly directed channel in the disc of the spindle to thereby form an injector.
  • the spindle initially decelerates and stops by means of the brake shoe which is delivered pneumatically against the braking surface on the whorl. Concurrently, the tension roller associated with the spindle is withdrawn from the drive belt so that the entrainment force thereof acting on the spindle is greatly reduced. Afterwards, pressurized air is directed through the outlet which opens out through the brake shoe to form an air cushion between the braking surface of the spindle and the braking surface of the brake shoe. This results in the adhesion between the braking surfaces being substantially reduced, and the spindle starts up again through the weak entrainment force of the drive belt.
  • An air passageway extends between the inlet aperture on the spindle whorl and the outwardly directed yarn channel, and the meeting of the air passageway and yarn channel is designed in an injector-like manner, thus the pressurized air causes a suction in the hollow spindle axle so tha a yarn end which is brought adjacent the upper end of the hollow spindle axle will be drawn through the hollow spindle axle and, under the effect of the pressurized air, will be conducted radially outwardly through the yarn channel.
  • one source of energy serves to actuate the brake shoe to initially stop the spindle, to permit adjustment of the stopping position until the predetermined location is reached, and then to thread the yarn through the hollow axle of the spindle.
  • the brake shoe of the present invention is operatively carried by a piston which is slidably mounted in a cylindrical housing.
  • a valve controlled compressed air line opens into the housing on one side of the piston such that the brake shoe may be delivered against the braking surface of the spindle pneumatically.
  • the pneumatic force acts against a spring force which is supplied by the restoring spring carried in the housing and contacting the other side of the piston.
  • the braking surface of the spindle is positioned on an outer generated surface of the spindle or on the whorl of the same, or on a surface extending approximately perpendicularly to the spindle axis.
  • the direction of movement of the brake shoe can be adjusted radially to the spindle, or it could be positioned parallel to the axis thereof.
  • the brake shoe is delivered radially against a cylindrical braking surface which is positioned on the whorl, and an inlet aperture opens radially therethrough.
  • the brake shoe may be operatively connected to the tension roller for concurrent withdrawing and delivering movement.
  • the tension roller is withdrawn to thereby greatly reduce the entrainment of the drive belt, and when the brake shoe is withdrawn, full entrainment force is reestablished.
  • a fixed cylindrical housing having a piston and brake shoe can be associated with each spindle so that each spindle has a breaking device of its own as well as means for carrying out the threading procedure.
  • the deceleration procedure can be triggered by a thread detector of conventional design and which is associated with each spindle.
  • each individual spindle may be stopped if the yarn brakes or the feed package is empty.
  • the cylindrical housing with the piston and brake shoe may be mounted on a carriage which is transportable along the machine and which can be selectively brought up to the spindle that is to be serviced.
  • the need for the above described braking apparatus on each individual spindle is eliminated, and this equipment may be brought up to that spindle position which requires a threading procedure or some other maintenance service by the operator.
  • a thread detector is associated with each spindle, and upon yarn breakage, the thread detector acts through a ratchet lever to cause a lever arm to swing into the working region of a rocking lever carried by the carriage.
  • the actuation of the rocking lever actuates a compressed-air control valve and thereby triggers the pneumatic stopping and threading procedure, along with stoppage of the carriage.
  • the conveying of the carriage may be effected by a motor hinged in suspended manner on the carriage such that a friction wheel driven by the motor engages a runner rail. Also, the wheel and motor may be pivoted away from the rail to terminate the movement of the carriage, such pivoting movement being controlled by an additional air actuated piston-cylinder unit.
  • the conveyance of the carriage is thus effected by a motor acting through a friction wheel drive and the conveying or stopping movement thereof is triggered pneumatically so that once more a common source of energy may be used.
  • a brake slide for each spindle whorl and positioned on the side thereof opposite the service side.
  • the brake slide includes a brake shoe which is adapted to be delivered radially under a spring force against the whorl immediately when the thread detector responds to thereby stop the spindle prior to the arrival of the carriage.
  • the brake slide is operatively controlled by a lever arm which also moves the tension roller away from the drive belt to thereby reduce the driving force during the braking action.
  • the above brake slide device makes allowance for the fact that in the event of a yarn breakage or the emptying of the feed package of a spindle, an immediate stopping of the spindle is desirable, i.e., before the carriage with the device for stopping the spindle in a predetermined position is brought up to the spindle in question.
  • the continued rotation of the spindle could lead to obvious problems, for example the further withdrawal of the yarn from the feed package after breakage of the yarn can lead to loop formations and similar difficulties which complicate the joining of the broken yarns.
  • a brake slide is associated with each spindle and which can be delivered radially under spring force against the whorl by a lever arm.
  • the lever arm also causes the tension roller to draw off from the drive belt to thereby greatly reduce the entrainment force of the drive belt, so that the spindle comes to a stop immediately after response of the thread detector, albeit in a random rotational position. Furthermore, the movement of the brake slide displaces a control body into the path of motion of the switch lever which is carried on the carriage. The switch lever in turn actuates the compressed air control valve and causes a stopping of the arriving carriage. The holding of the spindle and threading of the yarn is then undertaken by the apparatus in accordance with the invention which is mounted on the carriage and the preliminary brake which is first caused to respond and which is fixedly mounted at the rear side of each spindle is released.
  • all of the deceleration and stopping procedures as well as the threading-through procedure for the yarn are accomplished pneumatically, i.e., by means of a single source of energy.
  • the actuation of the apparatus can be brought about by'hand or automatically, but the automatic triggering by means of thread detectors is particularly advantageous.
  • the thread detector acts directly on the associated apparatus and causes this to respond.
  • an additional brake which is initially caused to respond by the thread detector and the function of which is later taken over by the apparatus of the present invention which is brought up on the carriage.
  • the apparatus undertakes the threading through procedure for the yarn and also brings about the resetting of the stationary brake into its initial non-operative position. Further, the apparatus controls the tension roller so that the spindle may be restarted after conclusion of the work to be carried out at the spindle.
  • the apparatus of the present invention can be used either in the case where a withdrawal of the tension roller from the drive beltis employed to facilitate the deceleration of the spindle and as described above, or in a case where the spindle is removed from the belt in order to greatly reduce the entrainment force of the belt. In the event of the removal of the spindle from the belt, it is merely necessary to adapt the present apparatus in its arrangement to the swung-out position of the spindle.
  • FIG.'1 is a sectional side elevational view of doubletwist spindle assembly, and embodying the features of the present invention
  • FIG. 2 is a front elevational view, partly sectioned, of the apparatus shown in FIG. 1, and viewed from the service side
  • FIG. 3 is a fragmentary front view of the braking surface of the brake shoe of the present invention
  • FIG. 4 is a sectional'top plan view takensubstantially along the line 4-4 in FIG. 2, and illustrating the spindle braking device;
  • FIG. 5 is a fragmentary top plan view similar to FIG. 4, partly broken away, and showing the rocking lever for'mounting the tension roller;
  • F IG. 6 is a sectional side elevational view of another embodiment of the present invention and wherein the brake means and pneumatic controls are conveyable along the apparatus;
  • FIG. 7 is a fragmentary view of the lever arm looking in the direction of the arrow 7 of FIG. 6;
  • FIG. 8 is a front elevational view, partly sectioned, of the apparatus shown in FIG. 6, and viewed from the service side;
  • FIG. 9 is a sectional top plan view taken substantially along the line 99 of FIG. 8;
  • FIG. 10 is a sectional side elevational view of still another embodiment of the present invention and wherein the brake means and pneumatic controls are conveyed along the apparatus by automatic means;
  • FIG. 11 is a front elevational view, partly sectioned of the apparatus shown in FIG. 10, and viewed from the service side;
  • FIG. 12 is a sectional top plan view taken substantially along the line 12-12 of FIG. 11; and illustrating the preliminary braking device in operative position;
  • FIG. 13 is a view similar to FIG. 12, the brake means and pneumatic controls on the carriage being shown in operational position and the preliminary braking device being withdrawn;
  • FIG. 14 is a fragmentary sectional view taken substantially along the line 14-14 of FIG. 13;
  • FIG. 15 is a fragmentary sectional view taken substantially along the line 15-15 of FIG. 12;
  • FIG. 16 is a view similar to FIG. 14 but showing the lever arm withdrawn to its normal operating position
  • FIG. 17 is a fragmentary sectional view taken substantially along the line 17-17 of FIG. 12.
  • FIGS. 1 to 5 there is illustrated a pneumatic device for the deceleration and stopping of a spindle, as well as for the threading of the yarn and through the hollow spindle axle.
  • the device is fixedly mounted on the service side of the textile processing machine in front of each spindle.
  • the spindle beam is designated generally in all of the figures by the numeral 1, and the beam mounts the I bearing stock 2 of each spindle.
  • the spindle rotor 3 of each spindle is mounted so as to be freely rotatable on the bearing stock 2, and includes a whorl 4 which is operatively contacted by the tangential drive belt 5, which drives all the spindles.
  • the belt 5 is pressed against the whorl 4 by means of the tension roller 6-.
  • the tension roller 6 is mounted so as to be rotatable on the rocking lever 7, which is pivoted on the bearing block8, the block 8 in turn being fixed to the spindle beam 1.
  • a drawspring 9 acts on the rocking lever 7 of the tension roller 6 in the direction of the spindle beam 1, the spring 9 being fastened at one end to the rocking lever 7 at the point 10 and at its ohter end to the spindle beam 1 by means of the adjustment screw 11'.
  • the path of swing of rocking lever 7' toward the tangential drive belt 5 is limited by the adjustable stop screw 12, which is carried on the rocking lever 7 and which, in the operational position shown in FIG. 5, butts against the spindle beam 1 to thereby limit the movement of the rocking lever 7.
  • the spindle rotor 3 carries the spool support 13 for the reception of the feed package 14 in the conventional manner, and the support 13 includes the protective pot 15.
  • the spool 13 is freely rotatable about the spindle rotor 3 in the customary manner, and is prevented from co-rotation by magnets 16 which are found in the separators 17 on both sides of each spindle, and which are fastened by means of supporting columns 18 to the spindle beam.
  • Extending upwardly beyond the protective pot 15 and forming a part of the spool support is the hollow spindle axle 19, through which the yarn 20, which is drawn off from the feed package 14 is axially pulled.
  • the lower end of the hollow axle 29 communicates with an outwardly directed channel 21 in the yarn feeder disc 22 which forms a part of the spindle rotor 3.
  • the yarn to be twisted emerges from the channel 21 and swings in its path to the take-up device (not shown) in a balloonshaped manner around the protective pot 15 and within the separators 17 and the cup-shaped balloon limitor 23.
  • the protective pot 15 is provided in the lower region with two large opposed openings 24, between which the webs 25 are situated.
  • the tension roller 6 is drawn away from the whorl 4, or the tangential drive belt 5, to such an extent that the tangential drive belt contacts the whorl 4 only lightly and with only slight entrainment force.
  • a brake shoe 36 moves from the service side toward the annular braking surface 26 of the whorl 4 and stops the whorl 4 and thus the spindle rotor 3.
  • the brake shoe 36 is at least partially released and then again fully applied when the spindle rotates to a predetermined position, namely, the position wherein the radial bore 27, which is situated in the whorl 4 finds itself in a forwardly directed position, note FIGS. 1 and 4.
  • the bore 27 communicates with an axial passageway 28 which extends axially through the whorl 4 and opens out into the channel 21 of the yarn feeder disc 22.
  • an axial passageway 28 which extends axially through the whorl 4 and opens out into the channel 21 of the yarn feeder disc 22.
  • the balloon-limiter 23 is provided with the downwardly projecting air and thread guide surface 31.
  • the surface 31 upwardly deflects the compressed air emerging from the channel 21 so that the entrained yarn is also deflected upwardly and takes the path designated by the arrow 32.
  • the yarn can be grasped above the spindle and can be connected to the take-up package. If the threading-through of the yarn is effected by reason of a thread breakage, then the joining-up is efiected with the free yarn end on the take-up spool.
  • This depicted pneumatic threading procedure is effected in accordance with the present invention directly in conjunction with the deceleration and stopping of the spindle.
  • the brake means for decelerating and stopping the spindle is indicated generally at 33, and means 33 being fixed to the spindle beam 1 and in association with each individual spindle.
  • the means 33 comprises the cylindrical housing 34, through which the piston 35 extends longitudinally.
  • the front end of the piston 35 includes an arcuate brake shoe 36, note FIG. 3.
  • a helical spring 37 encompasses the piston 35 in the interior of the housing 34, the spring 37 abutting the inner frontal surface of the housing at one end and the ring flange 38 of the piston 35 at the other end, the flange 38 being fixed to the piston 35.
  • the compressed air line 41 opens out into the space 40 behind the ring flange 38, and the second compressed air line 42 is fastened to the rearward free end of the piston 35 and communicates with the channel 43 which opens outs into the braking surface 44 (FIG. 3) of the brake shoe 36.
  • the channel 43 has a central outlet 45 (FIG. 3), which is adapted to lie exactly opposite the bore 27 in the whorl 4, as well as two transverse slots 46 communicating with the outlet 45 in the manner shown in FIGS. 1 and 3.
  • the means 33 is triggered by, for example, a thread detector or the like, pressurized air initially flows through the comrpessed air line 41 into the space to displace the piston 35 in the direction of the braking surface 26 of the whorl 4.
  • pressurized air initially flows through the comrpessed air line 41 into the space to displace the piston 35 in the direction of the braking surface 26 of the whorl 4.
  • the shoe 36 comes in contact with the surface 26, the rotation of the rotor 3 stops.
  • the withdrawal of the tension roller 6 from the whorl 4 is effected so that the entrained force of the tangential drive belt 5 is greatly reduced and only a weak entrainment of the whorl is effected, to thereby facilitate the braking action.
  • pressurized air is sent through the line 42 and through the channel 43 of the piston 35. This may be effected by an automatic delay valve or by hand.
  • the pressurized air exits through the outlet 45 and slits 46 and, assisted by the force of the spring 37, draws the brake shoe 36 slightly away from the whorl 4. In other words, the compressed air seeks to emerge between brake shoe 36 and surface 26, and an air cushion develops between whorl 4 and brake shoe 36.
  • the guidebars 48 are pivgtally connected to brake shoe 36 at 47 and the other ends of the bars are fastened to the yoke 49.
  • the bars 48 are positioned above the spindle beam on opposite sides of the whorl 4 and the yoke 49 has a slotted hole 50 which receives the pin 51 connected at the free end of the rocking lever 7.
  • the lever 7 swings counterclockwise as seen in FIGS. 4 and 5 from the position shown in solid lines in FIG. 5 to the position shown in dot-dash manner.
  • the stop screw 12 is drawn away from the spindle beam 1.
  • the tangential drive belt 5 is withdrawn, and the entrainment force acting on the whorl 4 is reduced to a relatively insignificant magnitude.
  • the resetting of the tension roller 6 is effected by the reverse movement of the piston 35 acting through the guide bars 48. When this occurs, the driving frictional connection between the tangential drive belt 5 and whorl 4 is re-established to rotate the spindle.
  • suitable valves and electrical switches are provided to actuate the brake means 33.
  • the brake means 33 may for example be designed to be activated electrically in the event of a yarn breakage.
  • the thread detector is positioned in the path of the yarn from the feed package 14 to the take-up package.
  • An electrical line 54 from the thread detector actuates the solenoid valve 53 through which the supply of compressed air is controlled.
  • two compressed air lines are provided having different pressure levels, namely the compressed air line 55 (FIG. 1) for the actuation of the brake, and the compressed air line 56 for thebuild-up of the air cushion between the brake shoe 36 and the whorl 4 and for the threadingthrough of the yarn.
  • the pressure in the lines 55 and 56 are coordinated to the size of the individual pressure surfaces upon which they act.
  • the specific pressure force applied in the space 40 is a function of the size of the annular surface of the ring flange 38.
  • the compressed air which flows through the channel 43 of the piston 35 must be sufficient for both the threading procedure and the build up of an air cushion between brake shoe 36 and braking surface 26 of the whorl 4, and yet it must not be so great as to prevent the resetting of the piston 35 when the predetermined position is reached.
  • the deceleration and stopping of the spindle is actuated by a thread detector. It will be understood however that a hand operated pushbutton 57 could be employed, the actuation of the push-button 57 causing the actuation of the solenoid valve 53.
  • a further hand operated push-button 58 releases the compressed air into the line 42 and allows it to flow into the channel 43 of the piston 35.
  • the spindle may be stopped automatically by the shifting of the piston 35 while the tension roller 6 is concurrently withdrawn. Further operation of the apparatus occurs only when the operator reaches the spindle in question and actuates hand push-button 58.v Its actuation is effected against a spring force so that the flow of compressed air into the channel 43 is interrupted immediately upon the release of the button 58 after termination of the threading-end procedure.
  • a brake means 33 is fixedly mounted at each spindle assembly.
  • the means for decelerating, adjusting and stopping the spindle, as well as for the threading through of the yarn is associated with several spindles and travels up to that spindle assembly which is occupied by an empty feed package or at which a yarn breakage has occurred.
  • the mode of operation of the apparatus in the event of a yarn breakage is discussed. Also, those parts which have already been described in conjunction with the embodiment illustratedin FIGS. 1 to 5 are provided with the same reference numbers and are discussed hereinafter only briefly, it being understood that their construction and mode of operation are similar to those of the above described embodiment.
  • the brake means 33 is carried by a carriage, which is supported by two rollers 60 on the angle rail 61, the rail 61 being a part of the machine frame and extending along one side of the machine. Furthermore, the carriage is supported on the perpendicular leg of the angle rail '62 which is fastened below the spindle beam 1 by means of the horizontally disposed rollers 63 and 64, the rollers 63 and 64 being mounted in the bearing blocks 65 and 66, which in turn are fixed to the mounting plate 67 of the carriage.
  • the cylindrical housing 34 of the brake means 33 is fastened to the upper edge of the mounting plate 67, the construction of which corresponds to that of the above described embodiment.
  • the two rollers 60 are mounted at the lower edge of the mounting plate 67, and two fixed brackets 68 depend downwardly thereform.
  • a pivot pin 69 is pivotally mounted between the brackets and carries a two-armed rocking lever 70 which grips under the angle .rail 61 with the end 71 having the brake lining 72.
  • An actution bar 74 with the handle is situated on the other arm 73 of the lever 70. If the carriage is shifted by hand along the machine on the angle rail 61, and along the angle rail 62, it may be stopped by swinging the actuation bar 74 from the position shown in dot-dash lines to the position shown in solid lines. Thus, through the swinging of the two-armed lever 70, the brake lining 72 thereof is made to come into frictional contact with the angle rail 61 to thereby slow down and stop the carriage.
  • a bracket 76 is fastened to the angle rail 61 as seen in FIG. 6, and a roller 77 is mounted on the bracket 76.
  • the roller 77 serves for the support of a compressed air tube 78, through which the compressed air may be supplied to the apparatus. Such rollers 77 are distributed over the entire length of the machine.
  • air tube 78 opens out into the pipe 79, which forms a part of the illustrated carriage.
  • the carriage as shown in FIGS. 6 to 9, may be stopped exactly at that spindle assembly at which a yarn breakage has occurred, and in addition, the whorl 4 is stopped at a predetermined location wherein the bore 27 of the whorl 4 is in alignment with the outlet 45 of the channel 43.
  • a thread detector shown schematically in FIG. 6
  • the pawl 84 which was supported on the ratchet lever 82, is released and swings downwardly.
  • the pawl 84 is pivoted at 85 on the machine frame, and includes the downwardly directed lever arm 86.
  • the lever arm 86 swings with the downward swinging of the pawl 84 out of the position shown in solid lines to the position shown in dot-dash lines.
  • the lever arm 86 has the shape shown in FIG. 7, which is similar to a ships anchor.
  • the lower end of the lever arm 86 includes two lateral arms 87 having a V-shaped lower edge having symmetrically inclined lower surfaces 91 to form an obtuse angle.
  • the lever arm 86 assoicated with the individual spindle in question is pivoted on the machine frame and attains the vertical position which is shown with dot-dash lines in FIG. 6. If the carriage is now conveyed along the machine, one of the inclined surfaces 91 of the lever 86 comes into contact with the two armed rocking lever 89 which is pivotally connected to the carriage at 88. More particularly, the engagement of the short lever arm 90 of the rocking lever 89 with the inclined surface 91 causes the lever arm 90 to move downwardly to the position shown in dot-dash lines, and the lever arm 92 of the rocking lever 89 to correspondingly swing upwardly, as indicated likewise in FIG. 6.
  • valve tappet 93 is actuated, which allows the valve 94 to respond immediately.
  • Compressed air, coming from the tube 78, thereby flows through the pipe 79, the throttle 95, the pipe 96, and to the pressure reducer 97,-having a pressure gauge 97.
  • a pressure reduction is effected and the air then flows with this lesser pressure through the pipe 98 via the pipe connection 99 to the valve 94 and then through the line 41 into the space 40 behind the ring flange 38 in the cylindrical housing 34.
  • Behind the throttle 95 there branches off a pipe 100 which is under the higher pressure and which opens out into the delay valve 101.
  • the valve 101 is initially in the closed position.
  • the arcuate braking surface 44 of the brake shoe 36 comes into contact with the braking surface26 of the whorl 4, and a centering of the two brake surfaces with regard to one another is effected, in that upon the coming together of the two braking surfaces the carriage experiences a corresponding displacement in either the direction of travel or in the opposite direction, in such a way that the axis of the opening 45 in the piston 35 perpendicularly intersects the axis of rotation of the spindle.
  • a pipe 105 branches off from the space 40 and leads to the delay valve 101 via the connecting piece 104 and the valve 103.
  • the valve 103 is normally open, however, it may if desired be closed by means of the lever 102.
  • the air which flows into the delay valve 101 actuates the same after a suitable delay period which is adjustable by the adjusting screw 101'. After the delay, the valve 101 is open so that compressed air flows from the pipe 100 into the line 106, which corresponds to the line 42 of the previous embodiment.
  • the compressed air flows into the channel 43 of the piston 35, so that a pressure cushion builds up between the surface 44 of the brake shoe 36 and the braking surface 26 of the whorl 4, which results in a slight withdrawal of the brake shoe 36 from the braking surface 26 so that the spindle rotor 3 is able to rotate slowly under the traction force of the tangential drive belt 5.
  • the bore 27 and the opening 45 of the channel 43 lie opposite to one another, the air coming out of the channel 43 flows freely into the bore 27 and emerges via the passageway 28 from the outlet channel 21 of the disc 22.
  • the pressure cushion between brake shoe 36 and braking surface 26 dissipates so that the brake shoe 36 comes into firm engagement with the braking surface 26 and therefore the whorl 4 again comes to a stop.
  • the threading procedure is thereafter effected in the manner described above.
  • the spindle is set in motion again by the operator shifting the bar 107 which is mounted on the carriage for movement transversely to the longitudinal direction of the machine. More particularly, the bar 107 as shown in solid lines in FIG. 6 is moved into the position shown in dot-dash lines by means of the pressure plate 108 which can be actuated for example by the knee. This displacement is effected against the force of the spring 109 in the housing body 110. The free end of the bar 107 strikes against the depending lever arm 86 and swings the latter out of the vertical position shown in dot-dash lines in FIG.
  • the carriage comprises a mounting plate 67 and is supported by means of two rollers 60 on an angle rail 61 which extends along the machine and which has a double-angle profile as shown in FIG. 10.
  • a motor driven friction wheel 1 11 contacts the rail 61 from below, the motor 112 including a gear 1l2"which is suspended eccentrically on the mounting plate 67 by means of two brackets 113 which are arranged on both sides of-the motor 112, note FIG. 11.
  • rollers 77 are positioned along the length of the machine for the guidance of the compressed air tube 78.
  • the friction wheel 111 contacts the angle rail 61, so'that the carriage runs continuously along on the machine. It is contemplated that the motor 112 runs continuously during the operation of the machine and is not switched off.
  • the power supply of the motor is effected via the current connector 116 from the live rail 117 which is enclosed by the housing 118 and extends along the machine frame adjacent the angle rail 61.
  • the motor is swung into the position shown in dot-dash lines in FIG. 10, so that the friction wheel 1 1 1 is released from the angle rail 61. This swing can be carried out by hand, for which the actuation bar 114 with the handle 115 is mounted on the motor.
  • the carriage travels to and The carriage of the embodiment of FIGS. 10-17 differs from the one in the embodiment of FIGS. 6 to 9 in that the deceleration and stopping of the spindle is not effected solely by the brake shoe 36 of the brake means 33.
  • the carriage needs a certain time to arrive at the spindle at which a yarn breakage has occurred. This can present a problem since the broken yarn continues to be withdrawn from the feed package, and unless a yarn catch device is present, the free yarn end can wind around the spindle rotor or parts of the same, making it difficult for the operator to free the windings and find the yarn ends to be joined. it is therefore desirable that the spindle come immediately to a standstill in the event of a yarn breakage, rather than continuing to rotate until the carriage has reached the spindle in question.
  • a stationary or fixed spindle brake isassociated with each spindle and lies on the side thereof opposite the brake shoe 36, namely on the same side as the tension roller 6.
  • the fixed spindle brake is desinged to respond immediately when the thread detector associated with the spindle signals a yarn breakage.
  • the tension roller 6 is somewhat different from the prior embodiments.
  • the tension roller 6 is mounted in the short leg of the lever arm (note FIG. 13) the arm 120 being pivotal about the pivot pin 119 which in turn is mounted on the bearing bracket 8 which is secured on the spindle beam 1.
  • the long leg of the lever arm 120 forms a pawl which cooperates with the ratchet 121, the lever 121 being pivotal about the stationary pin 122. If the lever 120 is in the position shown in dot-dash lines in FIG. 12 and 13, the arm 120 will be held in this position by the ratchet lever 121. Thus the tension roller 6 is pressed against tangential drive belt 5, such that the drive belt 5 drives the spindle rotor 3. The lever arm 120 assumes this position against the force of the spring 123, which extends between the stationary abutment 124 and the hinge point 125, and which lies around the bar 126 which-passes through the abutment 124, note FIG. 15.
  • the lever arm 120 is connected with a brake slide 128 having an arcuate brake shoe 129 by means of a perpendicularly extending index pin 127.
  • the brake slide 128 is guided for radial movement against the whorl 4 by the guides 130 which are fixed to the frame.
  • the connection between slides 128 and index pin 127, and thus with the lever 120, is not however always effected, but rather such connection is only effected when the brake slide 128 is moved forwardly against the whorl 4, note FIG. 15.
  • the brake slide 128 and brake shoe 129 are withdrawn from the braking surface 26 of the whorl 4, in which case the index pin 127 is below and disconnected from the slide 128.
  • the slide 128 is held in the withdrawn position by the spring 152 which extends between the stationary stop 131, which extends upwardly into the slot 132 in the slide 128, and the rearward end 133 of the slot 132.
  • the index pin 127 is slidably mounted within the sleeve 134 which extends downwardly from the lever arm 120 and is fixedly connected thereto.
  • a spring 135 is also positioned within the sleeve 134, the spring 135 being supported between a shoulder in the sleeve 134 and a ring collar 136 on the index pin 127.
  • the spring 135 is fully extended as shown in FIGS. 15 and 16 when the free upper end of the index pin 127 projects into the slot 132 of the slide 128, and the spring 135 is compressed when the free end of the index pin 127 lies below the brake slide 128, note FIG. 14.
  • the index pin 127 When the apparatus is operating normally, the index pin 127 is in a position shown in FIG. 16, and the lever arm 120 is in the position shown in dot-dash lines in FIGS. 12 and 13, the arm 120 being held in such position by the ratchet lever 121.
  • the brake slide 128 is withdrawn from the whorl 4 as shown in FIGS. 13 and 16, and is held in such withdrawn position by the spring 152. Should the yarn break, the thread detector responds to actuate the electromagnet 137, which pulls in the armature 138 against the force of the spring 139.
  • the carriage includes a fixed arm 140 having a V-shaped bottom edge similar to the inclined surfaces 91 on the lever arm 86 as seen in FIG. 7.
  • the lower end of the pin 127 mounts a mushroom-shaped body 141.
  • the downward movement of the mushroom-shaped body 141 resulting from its engagement with the arm 140 causes the rocking lever 89 to rotate counterclockwise and thereby actuate the valve 94.
  • the valve 94 not only triggers the functions described above in conjunction with the other embodiments, but also acts to swing the gear and motor 112 about the axis defined by the brackets 113.
  • a pneumatic unit 142 is fastened to the mounting plate 67 by means of the supporting arm 146, the piston 143 of the unit adapted to engage the arm 153 which is fixed to the gear 112 and extends upwardly as best seen in FIG. 10. This engagement causes the motor 112 and gear 112 to swing counterclockwise so that the friction wheel 111 is withdrawn from the runner rail 61.
  • the pneumatic unit 142 is connected to the line 41 via the pipe 145 and thus acts concurrently with the displacement of the piston 35 against the whorl 4.
  • the brake slide 128 is released but the spindle is held fast by the concurrent application of brake shoe 36 of the piston 35.
  • the upper free end of the index pin 127 drops out of the slot 132 of the slide 128, and the slide 128 and the brake shoe 129 are withdrawn from the whorl by the force of the spring 152.
  • the withdrawal of the slide 128 does not result in any movement of the lever arm 120.
  • the arm 120 remains in its forward position, and is shown in FIGS.
  • the air entering the bore 27 passes through the passageway 28 and exits through the channel 21 to permit the threading through of the yarn, all as described above in connection with the prior embodiments.
  • This automatic positioning of the spindle and threading procedure may if desired be triggered automatically by means of a delay valve 101 as described in conjunction with FIGS. 5 to 9.
  • FIG. 16 there is shown a mechanism for resetting the tension roller 6 against the drive belt 5 when the broken yarn has been repaired, this mechanism forming part of the system for also moving the carriage away from the spindle.
  • a switch lever 148 which is situated laterally of the cylindrical housing 34. Manual actuation of the lever 148 results in the opening of a valve and permits compressed air to enter piston-cylinder unit 149.
  • a piston 154 is operatively controlled by the unit 149 and extends coaxially with the bar 156.
  • the bar 156 is slidably mounted to the beam 1 by the strap 155 and is pivotally connected to the lever arm at 125, which is also where the bar 126 is connected.
  • the piston 154 is adapted to push the bar 156, together with the lever arm 120, against the force of the spring 123 and until the lever arm 120 comes into contact with the ratchet lever 121 and is held thereby.
  • the index pin 127 is lifted into the slot 132 by the force of the spring 135 to arrive at the position shown in FIG. 16.
  • the carriage moves on from the spindle.
  • the mushroom-shaped body 141 Once the mushroom-shaped body 141 is returned to its initial position as seen in FIG. 20, it remains outside the path of the arm as the carriage moves along the machine until the thread detector again causes the lever arm 120 to swing in the clockwise direction and thereby bring the mushroomshaped body 141 once again into the path of the arm 140 to stop the carriage.
  • a textile yarn processing apparatus such as a twister, spinning frame or the like and having a plurality of rotatable spindle assemblies for processing of yarn each of said spindle assemblies including a hollow axle and an outwardly directed channel communicating with said hollow axle and through which the yarn is adapted to travel, a whorl portion, and a tangential drive belt adapted to operatively engage said whorl

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US00310567A 1971-11-29 1972-11-29 Apparatus for pneumatically stopping spindle assemblies of a textile yarn processing machine in a predetermined position Expired - Lifetime US3805504A (en)

Applications Claiming Priority (1)

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DE2159075A DE2159075C3 (de) 1971-11-29 1971-11-29 Vorrichtung zum Abbremsen und Stillsetzen einer Doppeldrahtzwirnspindel mit Tangentialriemenantrieb in vorbestimmter Stellung

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US00310567A Expired - Lifetime US3805504A (en) 1971-11-29 1972-11-29 Apparatus for pneumatically stopping spindle assemblies of a textile yarn processing machine in a predetermined position

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US (1) US3805504A (pt)
JP (1) JPS5212295B2 (pt)
BR (1) BR7208307D0 (pt)
CH (1) CH557430A (pt)
CS (1) CS171176B2 (pt)
DE (1) DE2159075C3 (pt)
ES (1) ES409117A1 (pt)
FR (1) FR2162079B1 (pt)
GB (1) GB1357465A (pt)
IT (1) IT970638B (pt)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939633A (en) * 1973-10-17 1976-02-24 Palitex Project Company Gmbh Spindle start control device for textile yarn processing machine having knotting mechanism
US4326372A (en) * 1979-10-02 1982-04-27 Palitex Project-Company Gmbh Apparatus for braking and positioning a spinning or twisting spindle
US4386495A (en) * 1980-03-31 1983-06-07 Saurer-Allma Gmbh Double twisting spindle with a pneumatically operated threading device
US5099639A (en) * 1988-11-18 1992-03-31 Zinser Textilmaschinen Gmbh Apparatus for selectively resisting the rotation of spindles of a textile machine
US5735113A (en) * 1994-07-19 1998-04-07 Modern Fibers, Inc. Anti-choking spindle with cylinder having thread cutting slots
US5778650A (en) * 1995-12-30 1998-07-14 Palitex Project-Company Gmbh Device for stopping a spindle of a textile machine driven by a drive belt
US6502835B1 (en) * 2000-11-13 2003-01-07 Beere Tool Company, Inc. Collet holder with rotation mechanism and method
CN109114937A (zh) * 2015-11-29 2019-01-01 杭州跟策科技有限公司 衣柜支撑脚干燥机
CN109186226A (zh) * 2015-11-29 2019-01-11 杭州跟策科技有限公司 木雕海鸥烘干机
CN114737285A (zh) * 2022-04-19 2022-07-12 徐梦莎 包覆机中纱锭的出线机构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168605A (en) * 1977-12-28 1979-09-25 Officine Savio, S.P.A. Spindle for double twisting with pneumatic threading
FR2438101A1 (fr) * 1978-10-04 1980-04-30 Barmag Barmer Maschf Metier a retordre a double torsion avec dispositifs d'introduction pneumatique des fils
IT7960457V0 (it) * 1979-09-24 1979-09-24 Savio Spa Deflettore per fuso per ritorcitoio a doppia torsione.
DE2945647C2 (de) * 1979-11-12 1990-01-04 Degesch Gmbh, 6000 Frankfurt Verfahren zur Herstellung von Aluminiumphosphid und/oder Magnesiumphosphid

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US2715308A (en) * 1950-01-11 1955-08-16 Universal Winding Co Method of and apparatus for twisting and winding
GB907402A (en) * 1960-04-22 1962-10-03 Scragg & Sons Two-for-one spindle threader
US3310934A (en) * 1963-07-13 1967-03-28 Palitex Project Co Gmbh Double twist spindle
US3319410A (en) * 1963-07-13 1967-05-16 Palitex Project Co Gmbh Double twist frame
US3360915A (en) * 1964-02-17 1968-01-02 Palitex Project Co Gmbh Apparatus for changing spindles in a double twist spindle frame
DE1277085B (de) * 1964-05-16 1968-09-05 Zinser Textilmaschinen Gmbh Spinn- und Zwirnmaschine
US3552111A (en) * 1968-04-25 1971-01-05 Hamel Gmbh Zwirnmaschinen Threading arrangement for spinning and twisting machines
US3563019A (en) * 1968-03-28 1971-02-16 Hamel Gmbh Method of and apparatus for spinning and treating thread
US3636698A (en) * 1968-06-08 1972-01-25 Murata Machinery Ltd Method of threading a two-for-one yarn twister

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FR1440226A (fr) * 1964-05-16 1966-05-27 Zinser Textilmaschinen Gmbh Métier à filer et à retordre
FR1444610A (fr) * 1964-09-01 1966-07-01 Zinser Textilmaschinen Gmbh Frein pour broches de métiers à filer et à retordre

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Publication number Priority date Publication date Assignee Title
US2715308A (en) * 1950-01-11 1955-08-16 Universal Winding Co Method of and apparatus for twisting and winding
GB907402A (en) * 1960-04-22 1962-10-03 Scragg & Sons Two-for-one spindle threader
US3310934A (en) * 1963-07-13 1967-03-28 Palitex Project Co Gmbh Double twist spindle
US3319410A (en) * 1963-07-13 1967-05-16 Palitex Project Co Gmbh Double twist frame
US3360915A (en) * 1964-02-17 1968-01-02 Palitex Project Co Gmbh Apparatus for changing spindles in a double twist spindle frame
DE1277085B (de) * 1964-05-16 1968-09-05 Zinser Textilmaschinen Gmbh Spinn- und Zwirnmaschine
US3563019A (en) * 1968-03-28 1971-02-16 Hamel Gmbh Method of and apparatus for spinning and treating thread
US3552111A (en) * 1968-04-25 1971-01-05 Hamel Gmbh Zwirnmaschinen Threading arrangement for spinning and twisting machines
US3636698A (en) * 1968-06-08 1972-01-25 Murata Machinery Ltd Method of threading a two-for-one yarn twister

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939633A (en) * 1973-10-17 1976-02-24 Palitex Project Company Gmbh Spindle start control device for textile yarn processing machine having knotting mechanism
US4326372A (en) * 1979-10-02 1982-04-27 Palitex Project-Company Gmbh Apparatus for braking and positioning a spinning or twisting spindle
US4386495A (en) * 1980-03-31 1983-06-07 Saurer-Allma Gmbh Double twisting spindle with a pneumatically operated threading device
US5099639A (en) * 1988-11-18 1992-03-31 Zinser Textilmaschinen Gmbh Apparatus for selectively resisting the rotation of spindles of a textile machine
US5735113A (en) * 1994-07-19 1998-04-07 Modern Fibers, Inc. Anti-choking spindle with cylinder having thread cutting slots
US5778650A (en) * 1995-12-30 1998-07-14 Palitex Project-Company Gmbh Device for stopping a spindle of a textile machine driven by a drive belt
US6502835B1 (en) * 2000-11-13 2003-01-07 Beere Tool Company, Inc. Collet holder with rotation mechanism and method
CN109114937A (zh) * 2015-11-29 2019-01-01 杭州跟策科技有限公司 衣柜支撑脚干燥机
CN109186226A (zh) * 2015-11-29 2019-01-11 杭州跟策科技有限公司 木雕海鸥烘干机
CN109114937B (zh) * 2015-11-29 2020-06-09 南京溧水高新创业投资管理有限公司 衣柜支撑脚干燥机
CN109186226B (zh) * 2015-11-29 2020-06-09 南京青橄榄网络科技有限公司 木雕海鸥烘干机
CN114737285A (zh) * 2022-04-19 2022-07-12 徐梦莎 包覆机中纱锭的出线机构
CN114737285B (zh) * 2022-04-19 2023-04-18 徐梦莎 包覆机中纱锭的出线机构

Also Published As

Publication number Publication date
JPS5212295B2 (pt) 1977-04-06
DE2159075C3 (de) 1975-01-02
IT970638B (it) 1974-04-20
DE2159075A1 (de) 1973-06-14
ES409117A1 (es) 1975-11-16
JPS4863034A (pt) 1973-09-03
DE2159075B2 (pt) 1974-04-18
BR7208307D0 (pt) 1973-09-18
CS171176B2 (pt) 1976-10-29
GB1357465A (en) 1974-06-19
FR2162079B1 (pt) 1976-04-23
CH557430A (de) 1974-12-31
FR2162079A1 (pt) 1973-07-13

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