EP2873757B1 - Spinning machine with a fiber bundle suppply interruption device - Google Patents
Spinning machine with a fiber bundle suppply interruption device Download PDFInfo
- Publication number
- EP2873757B1 EP2873757B1 EP14191683.3A EP14191683A EP2873757B1 EP 2873757 B1 EP2873757 B1 EP 2873757B1 EP 14191683 A EP14191683 A EP 14191683A EP 2873757 B1 EP2873757 B1 EP 2873757B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fiber bundle
- holding
- duct
- roving
- spinning machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
- 239000000835 fiber Substances 0.000 title claims description 181
- 238000009987 spinning Methods 0.000 title claims description 47
- 230000007246 mechanism Effects 0.000 claims description 48
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 description 7
- 230000005284 excitation Effects 0.000 description 4
- 230000005281 excited state Effects 0.000 description 3
- 238000007378 ring spinning Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010040 friction spinning Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
- D01H13/18—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only
- D01H13/188—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only by cutting or clamping yarns or rovings
Definitions
- the present invention relates to a spinning machine comprising a fiber bundle supply interruption device. More specifically, the present invention relates to a spinning machine comprising a fiber bundle supply interruption device, which interrupts supply of a fiber bundle to a drafting unit.
- fine spinning machines that spin a yarn from a roving or a sliver
- the spinning is simultaneously performed in a plurality of spindles. Even if the yarn is cut during the spinning, the spinning in the spindles other than the spindle in which the yarn is cut continues.
- the supply of the fiber bundle even to the drafting unit of the spindle in which the yarn is cut continues, and the fiber bundle supplied from the drafting unit is drawn and collected.
- Some fine spinning machines include an interruption device, which interrupts the supply of the fiber bundle to the drafting unit of the spindle in which the yarn is cut.
- a stop device in a drafting unit that saves space and is applicable to an existing fine spinning machine is disclosed in JP H05-195333 A .
- the stop device disclosed in the above publication is formed integrally with an adjustment and load device for raising a top feed roller (top back roller).
- the stop device is maintained in the state in which the fiber bundle is supplied to the drafting unit in the normal operation state of the spinning machine.
- the stop device is brought into a state in which the supply of the fiber bundle is interrupted based on yarn-cut signals generated by a sensor when the yarn is cut.
- the interruption of the supply of the fiber bundle is performed by holding a stop flap at a pressing position, in which the stop flap presses the fiber bundle on a table.
- a mechanism that moves the stop flap between the pressing position and a retreated position includes an electromagnet controlled based on the yarn-cut signals.
- the electromagnet is contained in the support arm.
- a control cable (wiring) is guided from the electromagnet rearward of a machine base through the inside of a support arm and a bracket, which supports the support arm.
- the above stop device is easily added to an existing fine spinning machine.
- it is necessary to couple two stop devices to a support arm (weighting arm) of the drafting unit for two spindles. Accordingly, since operations for incorporating two electromagnets into the support arm are needed, the coupling operation is troublesome. Since the wirings required for driving the electromagnets are drawn out of the bracket, which supports the weighting arm, for every two spindles, the wiring operation is also troublesome.
- DE 196 42 222 A1 discloses a ring spinning machine comprising a drafting unit including a back roller set; a stop device including an actuator, which switches a pivotable shell between a state in which a roving is supplied to the drafting unit and a state in which the shell lifts off the back top roller from a back bottom roller to interrupt the supply of the roving; and a duct, which extends over the entire length of the ring spinning machine.
- the duct accommodates wiring and a controller required for driving the actuator.
- DE 43 38 057 A1 discloses a stop device for a spinning machine, comprising at least one clamp with two opposing shoes which move to the clamp position; and a nearby feed device which moves to the idle position when a thread break sensor is activated.
- the feed device, together with at least one thread guide piece, is adjustable with regard to the pair of clamp shoes.
- a common holder contains the whole assembly.
- US 4 656 822 A discloses a spinning machine with a fiber bundle interrupter in which at each spinning station, a yarn break sensor is provided in conjunction with a fiber bundle stopping unit.
- a coil spring biases a clamp member into its clamping position.
- DE 41 09 398 C1 discloses another stop device that can be added to an existing spinning machine.
- the stop device incorporates an electromagnet switched on by a thread break stop-motion, and forms a unit with a supply roll that can be lifted off.
- the unit is loaded pneumatically and the stop device is located on a holding rail fastened on a carriage, near the end of a support arm for the top rolls of the drawing system, and is replaceable.
- the electromagnet is integrated into a magnetic valve of a pneumatic component which is connected to the guide of the supply roll that can be lifted off.
- DE 38 29 310 A1 discloses a cover for fiber bundle supports on a drafting arrangement.
- the cover prevents that the fiber bundle is blown from the fiber bundle support by the blowing air of blowing-off devices running past supports on the drafting arrangement.
- US 5 211 709 A discloses a spinning machine that has the features defined in the preamble of claim 1.
- JP S59 178378 U discloses a drafting unit comprising a back bottom roller supporting portion which supports a back bottom roller and to which a fiber bundle holding mechanism is coupled.
- DD 268 719 A1 discloses a fiber bundle supply interruption device having a push bar coupled with a back bottom roller supporting portion of a drafting unit in an integrally moveable manner.
- JP S61 206679 U discloses a fiber bundle supply interruption device held by supporting bars passing right by a back bottom roller supporting portion of a drafting unit.
- An objective of the present invention is to provide a spinning machine comprising a fiber bundle supply interruption device that is easily added to the existing spinning machine and that facilitates wiring and position setting.
- a spinning machine includes the features set forth in claim 1.
- the phrase fiber bundle is directed to a fiber bundle that is scarcely twisted, such as of a roving and a sliver.
- a drafting unit 10 is of a three-pair-roller type configuration, and includes a front roller set 11, an apron set 13 wound around a middle roller set 12, and a back roller set 14.
- the front roller set 11 is configured by a front bottom roller 11a and a front top roller 11b.
- the middle roller set 12 is configured by a middle bottom roller 12a and middle top roller 12b.
- a bottom apron member 13a is wound around the middle bottom roller 12a, and a top apron member 13b is wound around the middle top roller 12b.
- the back roller set 14 is configured by a back bottom roller 14a and a back top roller 14b.
- the front bottom roller 11a is supported by a roller stand 15.
- the middle bottom roller 12a and the back bottom roller 14a are supported by the roller stand 15 through a middle bottom roller supporting portion 16, a back bottom roller supporting portion 17, and a bearing (not shown).
- the middle bottom roller supporting portion 16 and the back bottom roller supporting portion 17 are fixed to the roller stand 15 such that the positions of the middle bottom roller supporting portion 16 and the back bottom roller supporting portion 17 are adjustable in the front-back direction of the machine (lateral direction in Fig. 1 ).
- a weighting arm 18 is rotationally supported through a bracket 20 by a pivot 19, which is supported by the roller stand 15.
- the front top roller 11b, the middle top roller 12b, and the back top roller 14b are supported by the weighting arm 18 through a top roller supporting portion (not shown).
- a supporting bar 21 extends along the back bottom roller 14a.
- a fiber bundle supply interruption device is provided behind the back roller set 14.
- the fiber bundle supply interruption device is provided such that a fiber bundle holding mechanism 30, which holds the roving S to be supplied to the drafting unit 10 at a position rearward from the back roller set 14, is coupled to the duct 31.
- the duct 31 has a length that is greater than or equal to the length of four spindles.
- the duct 31 is formed to have a length sufficient to couple the fiber bundle holding mechanism 30 for twenty-four spindles to the duct 31, for example.
- the duct 31 is provided along the roller stand 15 in a moveable manner in the front-back direction, and fixed on a coupling member 32.
- the coupling member 32 is coupled with the back bottom roller supporting portion 17, which supports the back bottom roller 14a, in an integrally moveable manner. That is, the fiber bundle holding mechanism 30 is formed integrally with the back bottom roller supporting portion 17 of the drafting unit 10 in a position adjustable manner.
- the fiber bundle holding mechanism 30 is provided for each pair of spindles. That is, the fiber bundle holding mechanism 30 is provided for two spindles that form a pair.
- Two L-shaped supporting boards 33 are each fixed to the upper surface of the duct 31 by a bolt with a hexagon socket. Each holding member 34 is supported by the corresponding supporting board 33 such that the holding member 34 is rotated between a fiber bundle releasing position (position shown in Fig. 2 ) and a fiber bundle holding position (position shown in Fig. 6 ).
- the fiber bundle holding mechanism 30 includes fiber bundle guides 36.
- the fiber bundle guides 36 hold the roving S as a fiber bundle in cooperation with the corresponding holding members 34.
- the fiber bundle guides 36 guide the roving S supplied from a roving spool hung by a creel (not shown) in the state in which the fiber bundle guides 36 do not hold the roving S as a fiber bundle in cooperation with the corresponding holding members 34.
- each holding member 34 has a cylindrical holding portion body 34a, an L-shaped lever portion 34b in a side view, and a sectoral locked board 34c in a side view.
- Each lever portion 34b is formed integrally with an end of the corresponding holding portion body 34a, and is located above a supporting shaft 37 (rotation center).
- Each locked board 34c is located below the supporting shaft 37 (rotation center).
- Each holding portion body 34a includes a substantially triangular roving holding portion 34d in a side view on an outer circumferential portion of the holding portion body 34a that is away from the supporting board 33.
- a locking projection 34e is formed on the basal end of each roving holding portion 34d.
- each holding member 34 is rotationally supported at the holding portion body 34a by the corresponding supporting shaft 37 fixed to the supporting board 33.
- a torsion spring 38 as a biasing member is externally applied on the basal end of the corresponding roving holding portion 34d of the holding portion body 34a.
- Each torsion spring 38 plays a role to bias the corresponding holding member 34 from a fiber bundle releasing position to a fiber bundle holding position. In the fiber bundle holding position, each roving holding portion 34d presses the corresponding fiber bundle guide 36.
- Each torsion spring 38 biases the holding member 34 toward the fiber bundle holding position in the state in which one end of the holding member 34 is fixed to the supporting board 33, and the other end of the holding member 34 is locked by the locking projection 34e. Accordingly, the holding members 34 are maintained at a position in which the roving holding portions 34d hold the roving S in cooperation with the fiber bundle guides 36 in the state free from the application of an external force.
- Each fiber bundle guide 36 is supported by the corresponding supporting board 33 through a supporting shaft 39, which passes through the fiber bundle guide 36 and is fixed to the supporting board 33.
- Each fiber bundle guide 36 is formed cylindrical.
- the fiber bundle holding mechanism 30 is arranged at a position in which the distance between the holding position of the roving S by the holding members 34 and the fiber bundle guides 36 and the nipping position of the roving S by the back roller set 14 is greater than the fiber length of the fibers that configure the roving S.
- actuators 40 each corresponding to one of the locked boards 34c, are provided between the supporting boards 33.
- Each actuator 40 switches the corresponding holding member 34 between the state in which the holding member 34 is maintained at the fiber bundle releasing position and the state in which the holding member 34 is released from the maintained state.
- Each actuator 40 includes a pin 40a and contains a spring, which biases the pin 40a in the protruding direction, and a solenoid.
- Each actuator 40 is configured such that the pin 40a is drawn into the actuator 40 against the biasing force of the spring in the state in which current flows through the solenoid.
- Each actuator 40 is provided, in the state in which the holding member 34 is arranged at the fiber bundle releasing position, at a position in which the tip end of the pin 40a enters the hole as a locked portion 42 formed in the locked board 34c and the holding member 34 is maintained at the fiber bundle releasing position.
- Each actuator 40 is arranged below the weighting arm 18 of the drafting unit 10. As shown in Fig. 3 , the actuators 40 are fixed to the supporting member 41 (not shown in Fig. 5 ) provided between the supporting boards 33.
- Each locked board 34c is formed such that the locked portion 42 is located at a position in which the locked portion 42 is locked by the pin 40a in the state in which each holding member 34 is arranged at the fiber bundle releasing position.
- Each locked board 34c is formed in the shape that is locked by the tip end of the pin 40a, which is biased in the direction toward the locking position, in the state in which the holding members 34 are arranged at the fiber bundle holding position, or the state in which the holding members 34 are in the middle position between the fiber bundle releasing position and the fiber bundle holding position.
- each locked board 34c is maintained in the state in which the tip end of the pin 40a contacts the locked board 34c in the state in which the locked state of the pin 40a and the locked portion 42 is canceled, the holding member 34 is moved from the fiber bundle releasing position, and the actuator 40 is in the non-excited state.
- a controller C is provided in the duct 31 to check whether the yarn is cut in the spindle based on the yarn-cut signals of the yarn-cut sensor (not shown) and excite the solenoids of the actuators 40 of the fiber bundle holding mechanism 30 corresponding to the spindle in which the yarn is cut to interrupt the supply of the roving S to the spindle in which the yarn is cut.
- the controller C is connected to main wiring 43, which supplies electric power to excite the solenoids.
- the solenoid of each actuator 40 is connected through branch wiring 44 to a circuit branched from the power supply for the solenoids through an electric element for exciting the solenoids such as a transistor in the controller C.
- the solenoids of the actuators 40 are each excited for only a short period required to move the pin 40a to the position in which the locked state of the tip end of the pin 40a and the locked portion 42 of the locked board 34c is cancelled.
- the controller C is configured to be divided into a plurality of pieces by connecting the devices by the main wiring 43.
- the holding members 34 are arranged at the fiber bundle releasing position in which the roving holding portions 34d do not hold the roving S.
- each locked portion 42 of the locked board 34c is locked by the corresponding pin 40a of the actuator 40, and the holding member 34 is maintained at the fiber bundle releasing position.
- the non-yarn-cut state is directed to not only a state in which the roving S is supplied through the fiber bundle guides 36 to the drafting unit 10 and spun but also a state in which the roving S is not yet supplied to the drafting unit 10 prior to the start of the spinning.
- the controller C does not determine the yarn is cut even in the state the yarn-cut sensor does not detect the yarn, and the solenoid in each actuator 40 is maintained in the OFF state, i.e., the non-excited state.
- the roving S supplied from the roving spool hung by a creel is guided by the fiber bundle guides 36 and the trumpet 22 to be supplied to the back roller set 14.
- the roving S supplied to the back roller set 14 is drafted between the back roller set 14 and the apron set 13 and between the apron set 13 and the front roller set 11 to be a fleece.
- the fleece becomes a yarn and is wound on a bobbin through a snail wire and a traveler (not shown).
- the spindle in which the yarn is cut is identified by the detection signals of the yarn-cut sensor (not shown).
- An excitation current is then supplied from the controller C to the actuators 40 of the fiber bundle holding mechanism 30 corresponding to the spindle in which the yarn is cut for a short period.
- the pins 40a are each drawn and the locked state of the locked board 34c by the pin 40a is cancelled. Accordingly, the holding members 34 are rotated to the fiber bundle holding position by the effect of the torsion springs 38, and the roving holding portions 34d hold the roving S in cooperation with the corresponding fiber bundle guides 36 behind the back roller set 14 as shown in Fig. 7A .
- the distance between the holding position by the roving holding portions 34d and the fiber bundle guides 36 and the nipping position of the roving S by the back roller set 14 is less than the fiber length, at least some fibers, which configure the roving S, are subjected to the nipping effect by the back roller set 14 in the state in which the fibers are subjected to the holding effect by the roving holding portions 34d and the fiber bundle guides 36 and the nipping effect by the back roller set 14 simultaneously.
- a motor which drives the back roller set 14 is likely to be excessively loaded.
- the back roller set 14 rotates in the state in which the roving S remains stationary. This wears out a rubber cot (not shown), which coats the back roller set 14.
- the distance between the holding position by the roving holding portions 34d and the fiber bundle guides 36 and the nipping position of the roving S by the back roller set 14 is greater than the fiber length, some fibers, which configure the roving S and are held by the roving holding portions 34d and the fiber bundle guides 36, are not nipped by the back roller set 14. Some fibers, which configure the roving S and are subjected to the nipping effect by the back roller set 14, are not subjected to the holding effect by the roving holding portions 34d and the fiber bundle guides 36.
- the roving S is moved such that the fibers, which are not held by the roving holding portions 34d and the fiber bundle guides 36, are subjected to the nipping effect by the back roller set 14 to be drawn out from a group of the fibers. This cuts the roving S without increasing the torque of the back roller set 14.
- the distance between the holding position by the roving holding portions 34d and the fiber bundle guides 36 and the nipping position of the roving S by the back roller set 14 is excessively greater than the fiber length, the distance between the nipping point by the back roller set 14 and the end of the roving S is excessively long when the roving S is cut between the back roller set 14 and the fiber bundle holding mechanism 30 so that the roving S is likely to be wound around the back bottom roller 14a. Accordingly, it is preferable that the distance between the holding position by the roving holding portions 34d and the fiber bundle guides 36 and the nipping position of the roving S by the back roller set 14 be less than the circumferential length of the back bottom roller 14a.
- the actuators 40 are excited for a short period. This draws each pin 40a to cancel the locked state of the locked board 34c by the pin 40a. This rotates the holding members 34 such that the roving holding portions 34d move toward the fiber bundle holding position. The excitation of the actuators 40 is cancelled in the middle of the rotation of the holding members 34 so that the pins 40a are each brought into contact with the corresponding locked board 34c. The pins 40a are each maintained in contact with the locked board 34c even in the state in which the roving holding portions 34d are each arranged at the fiber bundle holding position.
- the lever portions 34b of the holding members 34 are manipulated by the operator or an automatic yarn piecing device so that the holding members 34 are arranged at the fiber bundle releasing position against the biasing force of the torsion springs 38.
- the pins 40a are maintained in contact with the corresponding locked boards 34c. Accordingly, the manipulation of the lever portions 34b smoothly rotates the holding members 34 to the fiber bundle releasing position.
- the locked portions 42 of the locked boards 34c face the corresponding pins 40a and the tip ends of the pins 40a lock the corresponding locked portions 42.
- the fiber bundle holding mechanism 30 is arranged at a predetermined position of the spinning machine in the state in which the fiber bundle holding mechanism 30 is coupled to the duct 31. Accordingly, before coupling the duct 31 to the spinning machine, a plurality of the fiber bundle holding mechanisms 30 are coupled on the duct 31 such that the holding members 34 are arranged at an interval of the length of the spindle. The duct 31 is then coupled to the spinning machine. This facilitates the coupling of the fiber bundle holding mechanism 30 to the spinning machine more than in the case in which the fiber bundle holding mechanism 30 is directly coupled to the spinning machine without providing the duct 31.
- the position of the back roller set 14 is adjusted once or twice per year. If the position of the back bottom roller 14a is adjusted, it is also necessary to adjust the position of the fiber bundle holding mechanism 30.
- the duct 31 is fixed on the coupling member 32 coupled to the back bottom roller supporting portion 17 in the integrally movable manner.
- the back bottom roller supporting portion 17 supports the back bottom roller 14a. Accordingly, the position adjustment of the fiber bundle holding mechanism 30 is performed integrally with the back bottom roller 14a of the drafting unit 10. As a result, it is not necessary to especially perform the position adjustment of the fiber bundle holding mechanism 30.
- the present invention is not limited to the above embodiment.
- the embodiment may be modified as follows, for example.
- the fiber bundle may be of not only the roving S but also the sliver.
- a fiber bundle supply interruption device may be used for a ring fine spinning machine that spins yarn from a sliver using a drafting unit that drafts a fiber bundle by far greater drafting ratio than in a normal drafting unit with three pairs of rollers as a drafting unit.
- the spinning machine is not limited to the ring fine spinning machine.
- the spinning machine may be a bundle spinning machine or a friction spinning machine, for example.
- the spinning machine may be a roving frame.
- the length of the duct 31 is not limited to the length corresponding to the length of twenty-four spindles as long as it has at least a length greater than or equal to the length of four spindles.
- the length of the duct 31 may be a length corresponding to the fiber bundle holding mechanism 30 for less than twenty-four spindles or a length corresponding to the fiber bundle holding mechanism 30 for more than twenty-four spindles.
- the positions of the actuators 40 are not limited to the position below the weighting arm 18.
- the actuators 40 may be arranged below the roving passage.
- each fiber bundle holding mechanism 30 is not limited to the configuration of the two spindles.
- each fiber bundle holding mechanism 30 may be configured to be independently coupled to the duct 31 for each spindle.
- the biasing members that bias the holding members 34 from the fiber bundle releasing position to the fiber bundle holding position are not limited to the torsion springs 38.
- the holding members 34 may be configured such that a weight is provided for biasing each holding member 34 toward the fiber bundle holding position or the weight of the holding members 34 biases the holding members 34 toward the fiber bundle holding position.
- the holding members 34 are not limited to the configuration in which the holding members 34 are rotationally provided between the fiber bundle releasing position and the fiber bundle holding position.
- the holding members 34 may be configured to move between the fiber bundle releasing position and the fiber bundle holding position according to a translatory movement.
- the shape of the duct 31 is not limited to a tetragonal tube-like.
- the shape of the duct 31 may be of any shape, for example, a pentagonal tube-like or a hexagonal tube-like as long as the duct 31 can be supported by the roller stand 15 and the fiber bundle holding mechanism 30 can be coupled to the duct 31.
- Holding members that hold the roving S in cooperation with the holding members 34 may be provided separately from the fiber bundle guides 36.
- Each locked portion 42 which is formed in the locked board 34c and locked by the corresponding pin 40a, is not limited to a hole.
- the locked portion 42 may be a recess, a groove, or a cutout.
- Each locked board 34c need not be sectoral.
- the locked board 34c may be of any shape as long as the locked board 34c includes the locked portion 42 to be locked by the corresponding pin 40a and is always in contact with the tip end of the pin 40a in the state in which the holding member 34 is in the middle of the movement from the fiber bundle releasing position to the fiber bundle holding position and arranged at the fiber bundle holding position.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
- The present invention relates to a spinning machine comprising a fiber bundle supply interruption device. More specifically, the present invention relates to a spinning machine comprising a fiber bundle supply interruption device, which interrupts supply of a fiber bundle to a drafting unit.
- In fine spinning machines that spin a yarn from a roving or a sliver, the spinning is simultaneously performed in a plurality of spindles. Even if the yarn is cut during the spinning, the spinning in the spindles other than the spindle in which the yarn is cut continues. In some of the fine spinning machines, the supply of the fiber bundle even to the drafting unit of the spindle in which the yarn is cut continues, and the fiber bundle supplied from the drafting unit is drawn and collected. Some fine spinning machines include an interruption device, which interrupts the supply of the fiber bundle to the drafting unit of the spindle in which the yarn is cut. As the interruption device, a stop device in a drafting unit that saves space and is applicable to an existing fine spinning machine is disclosed in
JP H05-195333 A - The stop device disclosed in the above publication is formed integrally with an adjustment and load device for raising a top feed roller (top back roller). The stop device is maintained in the state in which the fiber bundle is supplied to the drafting unit in the normal operation state of the spinning machine. The stop device is brought into a state in which the supply of the fiber bundle is interrupted based on yarn-cut signals generated by a sensor when the yarn is cut. The interruption of the supply of the fiber bundle is performed by holding a stop flap at a pressing position, in which the stop flap presses the fiber bundle on a table. A mechanism that moves the stop flap between the pressing position and a retreated position includes an electromagnet controlled based on the yarn-cut signals. The electromagnet is contained in the support arm. A control cable (wiring) is guided from the electromagnet rearward of a machine base through the inside of a support arm and a bracket, which supports the support arm.
- The above stop device is easily added to an existing fine spinning machine. When adding the stop device, it is necessary to couple two stop devices to a support arm (weighting arm) of the drafting unit for two spindles. Accordingly, since operations for incorporating two electromagnets into the support arm are needed, the coupling operation is troublesome. Since the wirings required for driving the electromagnets are drawn out of the bracket, which supports the weighting arm, for every two spindles, the wiring operation is also troublesome.
-
DE 196 42 222 A1 discloses a ring spinning machine comprising a drafting unit including a back roller set; a stop device including an actuator, which switches a pivotable shell between a state in which a roving is supplied to the drafting unit and a state in which the shell lifts off the back top roller from a back bottom roller to interrupt the supply of the roving; and a duct, which extends over the entire length of the ring spinning machine. The duct accommodates wiring and a controller required for driving the actuator. -
DE 43 38 057 A1 discloses a stop device for a spinning machine, comprising at least one clamp with two opposing shoes which move to the clamp position; and a nearby feed device which moves to the idle position when a thread break sensor is activated. The feed device, together with at least one thread guide piece, is adjustable with regard to the pair of clamp shoes. A common holder contains the whole assembly. -
US 4 656 822 A discloses a spinning machine with a fiber bundle interrupter in which at each spinning station, a yarn break sensor is provided in conjunction with a fiber bundle stopping unit. A coil spring biases a clamp member into its clamping position. -
DE 41 09 398 C1 discloses another stop device that can be added to an existing spinning machine. The stop device incorporates an electromagnet switched on by a thread break stop-motion, and forms a unit with a supply roll that can be lifted off. The unit is loaded pneumatically and the stop device is located on a holding rail fastened on a carriage, near the end of a support arm for the top rolls of the drawing system, and is replaceable. The electromagnet is integrated into a magnetic valve of a pneumatic component which is connected to the guide of the supply roll that can be lifted off. -
DE 38 29 310 A1 discloses a cover for fiber bundle supports on a drafting arrangement. The cover prevents that the fiber bundle is blown from the fiber bundle support by the blowing air of blowing-off devices running past supports on the drafting arrangement. -
US 5 211 709 A discloses a spinning machine that has the features defined in the preamble of claim 1. -
JP S59 178378 U -
DD 268 719 A1 -
JP S61 206679 U - An objective of the present invention is to provide a spinning machine comprising a fiber bundle supply interruption device that is easily added to the existing spinning machine and that facilitates wiring and position setting.
- To achieve the foregoing object, a spinning machine includes the features set forth in claim 1. The phrase fiber bundle is directed to a fiber bundle that is scarcely twisted, such as of a roving and a sliver.
- Other aspects and advantages of the present invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.
- The invention, together with objects and advantages thereof, may best be understood by reference to the following description of the presently preferred embodiments together with the accompanying drawings in which:
-
Fig. 1 is a side view schematically illustrating a drafting unit; -
Fig. 2 is a partially enlarged view schematically illustrating surroundings of the roving supply interruption device ofFig. 1 ; -
Fig. 3 is a partial cross-sectional view taken along line 3-3 ofFig. 2 ; -
Fig. 4 is a perspective view schematically illustrating a fiber bundle holding mechanism; -
Fig. 5 is a diagram as viewed along arrow B inFig. 3 ; -
Fig. 6 is a side view illustrating a state in which a holding member has been rotated to a holding position; -
Fig. 7A is a side view schematically illustrating operation of the fiber bundle holding mechanism; and -
Fig. 7B is a side view schematically illustrating operation of the fiber bundle holding mechanism. - Hereinafter, a fine spinning machine according to one embodiment of the present invention will be described according to
Figs. 1 to 7B . - As shown in
Fig. 1 , adrafting unit 10 is of a three-pair-roller type configuration, and includes a front roller set 11, an apron set 13 wound around a middle roller set 12, and a back roller set 14. - The front roller set 11 is configured by a
front bottom roller 11a and afront top roller 11b. Themiddle roller set 12 is configured by amiddle bottom roller 12a and middletop roller 12b. Abottom apron member 13a is wound around themiddle bottom roller 12a, and atop apron member 13b is wound around themiddle top roller 12b. Theback roller set 14 is configured by aback bottom roller 14a and aback top roller 14b. - The
front bottom roller 11a is supported by aroller stand 15. Themiddle bottom roller 12a and theback bottom roller 14a are supported by theroller stand 15 through a middle bottomroller supporting portion 16, a back bottomroller supporting portion 17, and a bearing (not shown). The middle bottomroller supporting portion 16 and the back bottomroller supporting portion 17 are fixed to theroller stand 15 such that the positions of the middle bottomroller supporting portion 16 and the back bottomroller supporting portion 17 are adjustable in the front-back direction of the machine (lateral direction inFig. 1 ). - A
weighting arm 18 is rotationally supported through abracket 20 by apivot 19, which is supported by theroller stand 15. Thefront top roller 11b, the middletop roller 12b, and theback top roller 14b are supported by theweighting arm 18 through a top roller supporting portion (not shown). - Behind the
back bottom roller 14a, a supportingbar 21 extends along theback bottom roller 14a. Atrumpet 22, which guides a roving S as a fiber bundle, is fixed to the supportingbar 21. - A fiber bundle supply interruption device is provided behind the back roller set 14. The fiber bundle supply interruption device is provided such that a fiber
bundle holding mechanism 30, which holds the roving S to be supplied to thedrafting unit 10 at a position rearward from the back roller set 14, is coupled to theduct 31. Theduct 31 has a length that is greater than or equal to the length of four spindles. Theduct 31 is formed to have a length sufficient to couple the fiberbundle holding mechanism 30 for twenty-four spindles to theduct 31, for example. Theduct 31 is provided along the roller stand 15 in a moveable manner in the front-back direction, and fixed on acoupling member 32. Thecoupling member 32 is coupled with the back bottomroller supporting portion 17, which supports the backbottom roller 14a, in an integrally moveable manner. That is, the fiberbundle holding mechanism 30 is formed integrally with the back bottomroller supporting portion 17 of the draftingunit 10 in a position adjustable manner. - As shown in
Figs. 3 and5 , the fiberbundle holding mechanism 30 is provided for each pair of spindles. That is, the fiberbundle holding mechanism 30 is provided for two spindles that form a pair. Two L-shaped supportingboards 33 are each fixed to the upper surface of theduct 31 by a bolt with a hexagon socket. Each holdingmember 34 is supported by the corresponding supportingboard 33 such that the holdingmember 34 is rotated between a fiber bundle releasing position (position shown inFig. 2 ) and a fiber bundle holding position (position shown inFig. 6 ). The fiberbundle holding mechanism 30 includes fiber bundle guides 36. The fiber bundle guides 36 hold the roving S as a fiber bundle in cooperation with the corresponding holdingmembers 34. The fiber bundle guides 36 guide the roving S supplied from a roving spool hung by a creel (not shown) in the state in which the fiber bundle guides 36 do not hold the roving S as a fiber bundle in cooperation with the corresponding holdingmembers 34. - More specifically, as shown in
Figs. 2, 3 ,4 , and6 , each holdingmember 34 has a cylindricalholding portion body 34a, an L-shapedlever portion 34b in a side view, and a sectoral lockedboard 34c in a side view. Eachlever portion 34b is formed integrally with an end of the corresponding holdingportion body 34a, and is located above a supporting shaft 37 (rotation center). Each lockedboard 34c is located below the supporting shaft 37 (rotation center). Each holdingportion body 34a includes a substantially triangularroving holding portion 34d in a side view on an outer circumferential portion of the holdingportion body 34a that is away from the supportingboard 33. A lockingprojection 34e is formed on the basal end of eachroving holding portion 34d. - As shown in
Fig. 3 , each holdingmember 34 is rotationally supported at the holdingportion body 34a by the corresponding supportingshaft 37 fixed to the supportingboard 33. As for each holdingmember 34, atorsion spring 38 as a biasing member is externally applied on the basal end of the corresponding roving holdingportion 34d of the holdingportion body 34a. Eachtorsion spring 38 plays a role to bias the corresponding holdingmember 34 from a fiber bundle releasing position to a fiber bundle holding position. In the fiber bundle holding position, eachroving holding portion 34d presses the correspondingfiber bundle guide 36. Eachtorsion spring 38 biases the holdingmember 34 toward the fiber bundle holding position in the state in which one end of the holdingmember 34 is fixed to the supportingboard 33, and the other end of the holdingmember 34 is locked by the lockingprojection 34e. Accordingly, the holdingmembers 34 are maintained at a position in which theroving holding portions 34d hold the roving S in cooperation with the fiber bundle guides 36 in the state free from the application of an external force. - Each
fiber bundle guide 36 is supported by the corresponding supportingboard 33 through a supportingshaft 39, which passes through thefiber bundle guide 36 and is fixed to the supportingboard 33. Eachfiber bundle guide 36 is formed cylindrical. - The fiber
bundle holding mechanism 30 is arranged at a position in which the distance between the holding position of the roving S by the holdingmembers 34 and the fiber bundle guides 36 and the nipping position of the roving S by the back roller set 14 is greater than the fiber length of the fibers that configure the roving S. - As shown in
Figs. 3 and5 ,actuators 40, each corresponding to one of the lockedboards 34c, are provided between the supportingboards 33. Eachactuator 40 switches the corresponding holdingmember 34 between the state in which the holdingmember 34 is maintained at the fiber bundle releasing position and the state in which the holdingmember 34 is released from the maintained state. Eachactuator 40 includes apin 40a and contains a spring, which biases thepin 40a in the protruding direction, and a solenoid. Eachactuator 40 is configured such that thepin 40a is drawn into theactuator 40 against the biasing force of the spring in the state in which current flows through the solenoid. Eachactuator 40 is provided, in the state in which the holdingmember 34 is arranged at the fiber bundle releasing position, at a position in which the tip end of thepin 40a enters the hole as a lockedportion 42 formed in the lockedboard 34c and the holdingmember 34 is maintained at the fiber bundle releasing position. Eachactuator 40 is arranged below theweighting arm 18 of the draftingunit 10. As shown inFig. 3 , theactuators 40 are fixed to the supporting member 41 (not shown inFig. 5 ) provided between the supportingboards 33. - Each locked
board 34c is formed such that the lockedportion 42 is located at a position in which the lockedportion 42 is locked by thepin 40a in the state in which each holdingmember 34 is arranged at the fiber bundle releasing position. Each lockedboard 34c is formed in the shape that is locked by the tip end of thepin 40a, which is biased in the direction toward the locking position, in the state in which the holdingmembers 34 are arranged at the fiber bundle holding position, or the state in which the holdingmembers 34 are in the middle position between the fiber bundle releasing position and the fiber bundle holding position. That is, each lockedboard 34c is maintained in the state in which the tip end of thepin 40a contacts the lockedboard 34c in the state in which the locked state of thepin 40a and the lockedportion 42 is canceled, the holdingmember 34 is moved from the fiber bundle releasing position, and theactuator 40 is in the non-excited state. - In the fine spinning machine, a controller C is provided in the
duct 31 to check whether the yarn is cut in the spindle based on the yarn-cut signals of the yarn-cut sensor (not shown) and excite the solenoids of theactuators 40 of the fiberbundle holding mechanism 30 corresponding to the spindle in which the yarn is cut to interrupt the supply of the roving S to the spindle in which the yarn is cut. The controller C is connected tomain wiring 43, which supplies electric power to excite the solenoids. The solenoid of each actuator 40 is connected throughbranch wiring 44 to a circuit branched from the power supply for the solenoids through an electric element for exciting the solenoids such as a transistor in the controller C. As for the excitation time of the solenoids of theactuators 40, the solenoids are each excited for only a short period required to move thepin 40a to the position in which the locked state of the tip end of thepin 40a and the lockedportion 42 of the lockedboard 34c is cancelled. The controller C is configured to be divided into a plurality of pieces by connecting the devices by themain wiring 43. - Next, the operation of the fiber
bundle holding mechanism 30 as above configured will be described. - As shown in
Figs. 1 and2 , in the non-yarn-cut state, the holdingmembers 34 are arranged at the fiber bundle releasing position in which theroving holding portions 34d do not hold the roving S. In this state, each lockedportion 42 of the lockedboard 34c is locked by thecorresponding pin 40a of theactuator 40, and the holdingmember 34 is maintained at the fiber bundle releasing position. The non-yarn-cut state is directed to not only a state in which the roving S is supplied through the fiber bundle guides 36 to thedrafting unit 10 and spun but also a state in which the roving S is not yet supplied to thedrafting unit 10 prior to the start of the spinning. In the state prior to the start of the spinning, the controller C does not determine the yarn is cut even in the state the yarn-cut sensor does not detect the yarn, and the solenoid in each actuator 40 is maintained in the OFF state, i.e., the non-excited state. - When the operation of the fine spinning machine is started, the roving S supplied from the roving spool hung by a creel (not shown) is guided by the fiber bundle guides 36 and the
trumpet 22 to be supplied to the back roller set 14. The roving S supplied to the back roller set 14 is drafted between the back roller set 14 and the apron set 13 and between the apron set 13 and the front roller set 11 to be a fleece. The fleece becomes a yarn and is wound on a bobbin through a snail wire and a traveler (not shown). - When the yarn is cut, the spindle in which the yarn is cut is identified by the detection signals of the yarn-cut sensor (not shown). An excitation current is then supplied from the controller C to the
actuators 40 of the fiberbundle holding mechanism 30 corresponding to the spindle in which the yarn is cut for a short period. Thepins 40a are each drawn and the locked state of the lockedboard 34c by thepin 40a is cancelled. Accordingly, the holdingmembers 34 are rotated to the fiber bundle holding position by the effect of the torsion springs 38, and theroving holding portions 34d hold the roving S in cooperation with the corresponding fiber bundle guides 36 behind the back roller set 14 as shown inFig. 7A . - When the roving S is held by the
roving holding portions 34d and the fiber bundle guides 36, the movement of the roving S is prevented at a position in which the roving S is held. At this time, the driving of the draftingunit 10 is continued, and the roving S is pulled by the back roller set 14 in the state in which the roving S is held by theroving holding portions 34d and the fiber bundle guides 36. - If the distance between the holding position by the
roving holding portions 34d and the fiber bundle guides 36 and the nipping position of the roving S by the back roller set 14 is less than the fiber length, at least some fibers, which configure the roving S, are subjected to the nipping effect by the back roller set 14 in the state in which the fibers are subjected to the holding effect by theroving holding portions 34d and the fiber bundle guides 36 and the nipping effect by the back roller set 14 simultaneously. As a result, in the case in which the torque increases when the back roller set 14 pulls the roving S so that the cutting of a plurality of pieces of the yarn is simultaneously caused, a motor, which drives the back roller set 14, is likely to be excessively loaded. Since the roving S is cut in the state in which the end of the roving S comes between the back roller set 14 and the middle roller set 12 (apron set 13) as shown inFig. 7B , the back roller set 14 rotates in the state in which the roving S remains stationary. This wears out a rubber cot (not shown), which coats the back roller set 14. - However, since the distance between the holding position by the
roving holding portions 34d and the fiber bundle guides 36 and the nipping position of the roving S by the back roller set 14 is greater than the fiber length, some fibers, which configure the roving S and are held by theroving holding portions 34d and the fiber bundle guides 36, are not nipped by the back roller set 14. Some fibers, which configure the roving S and are subjected to the nipping effect by the back roller set 14, are not subjected to the holding effect by theroving holding portions 34d and the fiber bundle guides 36. Accordingly, the roving S is moved such that the fibers, which are not held by theroving holding portions 34d and the fiber bundle guides 36, are subjected to the nipping effect by the back roller set 14 to be drawn out from a group of the fibers. This cuts the roving S without increasing the torque of the back roller set 14. - If the distance between the holding position by the
roving holding portions 34d and the fiber bundle guides 36 and the nipping position of the roving S by the back roller set 14 is excessively greater than the fiber length, the distance between the nipping point by the back roller set 14 and the end of the roving S is excessively long when the roving S is cut between the back roller set 14 and the fiberbundle holding mechanism 30 so that the roving S is likely to be wound around the backbottom roller 14a. Accordingly, it is preferable that the distance between the holding position by theroving holding portions 34d and the fiber bundle guides 36 and the nipping position of the roving S by the back roller set 14 be less than the circumferential length of the backbottom roller 14a. - The
actuators 40 are excited for a short period. This draws eachpin 40a to cancel the locked state of the lockedboard 34c by thepin 40a. This rotates the holdingmembers 34 such that theroving holding portions 34d move toward the fiber bundle holding position. The excitation of theactuators 40 is cancelled in the middle of the rotation of the holdingmembers 34 so that thepins 40a are each brought into contact with the corresponding lockedboard 34c. Thepins 40a are each maintained in contact with the lockedboard 34c even in the state in which theroving holding portions 34d are each arranged at the fiber bundle holding position. - When the repairing operation of the cut yarn is performed, the
lever portions 34b of the holdingmembers 34 are manipulated by the operator or an automatic yarn piecing device so that the holdingmembers 34 are arranged at the fiber bundle releasing position against the biasing force of the torsion springs 38. During a period in which the holdingmembers 34 rotate from the fiber bundle holding position to the fiber bundle releasing position, thepins 40a are maintained in contact with the corresponding lockedboards 34c. Accordingly, the manipulation of thelever portions 34b smoothly rotates the holdingmembers 34 to the fiber bundle releasing position. When the holdingmembers 34 rotate to the fiber bundle releasing position, the lockedportions 42 of the lockedboards 34c face the correspondingpins 40a and the tip ends of thepins 40a lock the corresponding lockedportions 42. As a result, even if the operator or the automatic yarn piecing device lets go of thelever portions 34b, the holdingmembers 34 are maintained at the fiber bundle releasing position against the biasing force of the torsion springs 38, and return to the spinnable state. The yarn piecing is performed in this state. - The fiber
bundle holding mechanism 30 is arranged at a predetermined position of the spinning machine in the state in which the fiberbundle holding mechanism 30 is coupled to theduct 31. Accordingly, before coupling theduct 31 to the spinning machine, a plurality of the fiberbundle holding mechanisms 30 are coupled on theduct 31 such that the holdingmembers 34 are arranged at an interval of the length of the spindle. Theduct 31 is then coupled to the spinning machine. This facilitates the coupling of the fiberbundle holding mechanism 30 to the spinning machine more than in the case in which the fiberbundle holding mechanism 30 is directly coupled to the spinning machine without providing theduct 31. - Generally, in the drafting unit, the position of the back roller set 14 is adjusted once or twice per year. If the position of the back
bottom roller 14a is adjusted, it is also necessary to adjust the position of the fiberbundle holding mechanism 30. Theduct 31 is fixed on thecoupling member 32 coupled to the back bottomroller supporting portion 17 in the integrally movable manner. The back bottomroller supporting portion 17 supports the backbottom roller 14a. Accordingly, the position adjustment of the fiberbundle holding mechanism 30 is performed integrally with the backbottom roller 14a of the draftingunit 10. As a result, it is not necessary to especially perform the position adjustment of the fiberbundle holding mechanism 30. - The above embodiment has the following advantages.
- (1) The fiber bundle supply interruption device includes the drafting
unit 10, which includes the back roller set 14, theduct 31, which has the length that is greater than or equal to the length of four spindles, and the fiberbundle holding mechanism 30, which is coupled to theduct 31 and holds the fiber bundle (roving S) to be supplied to thedrafting unit 10 at a position rearward from the back roller set 14 of the draftingunit 10. The fiberbundle holding mechanism 30 includes biasing members that bias the corresponding holdingmembers 34 from the fiber bundle releasing position to the fiber bundle holding position, and theactuators 40, which switch the corresponding holdingmembers 34 between the state in which the holdingmembers 34 are maintained at the fiber bundle releasing position and the state in which the holdingmembers 34 are released from the maintained state. Accordingly, before coupling theduct 31 to the spinning machine, a plurality of the fiberbundle holding mechanisms 30 are coupled on theduct 31 such that the holdingmembers 34 are arranged at an interval of the spindles. Theduct 31 is then coupled to the spinning machine. This facilitates the coupling operation of the fiberbundle holding mechanism 30 to the spinning machine more than in the case in which the fiberbundle holding mechanism 30 is directly coupled to the spinning machine without providing theduct 31. - (2) The
duct 31 accommodates themain wiring 43 and the branch wirings 44 required for driving theactuators 40. This facilitates the arrangement of themain wiring 43 and the branch wirings 44 more than in the conventional case. - (3) The
actuators 40 are arranged below theweighting arm 18 of the draftingunit 10. Theactuators 40 may be arranged not below theweighting arm 18 but below the position in which the fiber bundle passes. However, since theactuators 40 are arranged below theweighting arm 18, the arrangement space is more easily ensured and a passage through which the fiber bundle passes during the spinning resists the collection of floating fibers. - (4) The fiber
bundle holding mechanism 30 is provided for each pair of spindles. The fiberbundle holding mechanisms 30 may be configured to be coupled to theduct 31 independent from each other for each spindle, for example. However, if the fiberbundle holding mechanism 30 is provided for each pair of spindles, the configuration is simplified in the relationship with theweighting arm 18, which supports the top rollers of the draftingunit 10. - (5) The holding
members 34 are rotationally provided between the fiber bundle releasing position and the fiber bundle holding position. The biasing members are the torsion springs 38. Each holdingmember 34 may be configured to move between the fiber bundle releasing position and the fiber bundle holding position according to a translatory movement. However, if the rotating configuration is employed, the space of the movement range of the holdingmember 34 is more easily ensured. The weight of the holdingmembers 34 or the weight biases the holdingmembers 34 from the fiber bundle releasing position to the fiber bundle holding position. However, if the torsion springs 38 are employed, the torsion springs 38 reliably bias the holdingmembers 34. - (6) Each
actuator 40 is configured to contain the solenoid and the spring such that thepin 40a biased by the spring to the protruding position is drawn from the protruding position to the retracted position by the solenoid in the excited state. Accordingly, the excitation for a short period simplifies the configuration for cancelling the state in which the holdingmembers 34 are maintained at the fiber bundle releasing position. - (7) The fiber
bundle holding mechanism 30 is formed integrally with the back bottomroller supporting portion 17 of the draftingunit 10 in a position adjustable manner. According to the configuration, when the position of the backbottom roller 14a is adjusted, the position of the fiberbundle holding mechanism 30 is also simultaneously adjusted to an appropriate position. - (8) The fiber
bundle holding mechanism 30 is coupled to theduct 31, and theduct 31 is fixed on thecoupling member 32 coupled to the back bottomroller supporting portion 17 in the integrally movable manner. The back bottomroller supporting portion 17 supports the backbottom roller 14a. This simplifies the configuration for, when the position of the backbottom roller 14a is adjusted, simultaneously adjusting the position of the fiberbundle holding mechanism 30 to an appropriate position as well. - (9) The fiber
bundle holding mechanism 30 includes the fiber bundle guides 36, and the fiber bundle guides 36 and the holdingmembers 34 cooperate with each other to hold the fiber bundle (roving S). The configuration allows the holdingmembers 34 to reliably hold the fiber bundle in comparison to the case in which the fiber bundle guides 36 are not provided. - The present invention is not limited to the above embodiment. The embodiment may be modified as follows, for example.
- The fiber bundle may be of not only the roving S but also the sliver. For example, even in a ring fine spinning machine, a fiber bundle supply interruption device may be used for a ring fine spinning machine that spins yarn from a sliver using a drafting unit that drafts a fiber bundle by far greater drafting ratio than in a normal drafting unit with three pairs of rollers as a drafting unit.
- The spinning machine is not limited to the ring fine spinning machine. The spinning machine may be a bundle spinning machine or a friction spinning machine, for example.
- The spinning machine may be a roving frame.
- The length of the
duct 31 is not limited to the length corresponding to the length of twenty-four spindles as long as it has at least a length greater than or equal to the length of four spindles. The length of theduct 31 may be a length corresponding to the fiberbundle holding mechanism 30 for less than twenty-four spindles or a length corresponding to the fiberbundle holding mechanism 30 for more than twenty-four spindles. - The positions of the
actuators 40 are not limited to the position below theweighting arm 18. For example, theactuators 40 may be arranged below the roving passage. - The configuration of the fiber
bundle holding mechanism 30 is not limited to the configuration of the two spindles. For example, each fiberbundle holding mechanism 30 may be configured to be independently coupled to theduct 31 for each spindle. - The biasing members that bias the holding
members 34 from the fiber bundle releasing position to the fiber bundle holding position are not limited to the torsion springs 38. For example, the holdingmembers 34 may be configured such that a weight is provided for biasing each holdingmember 34 toward the fiber bundle holding position or the weight of the holdingmembers 34 biases the holdingmembers 34 toward the fiber bundle holding position. - The holding
members 34 are not limited to the configuration in which the holdingmembers 34 are rotationally provided between the fiber bundle releasing position and the fiber bundle holding position. The holdingmembers 34 may be configured to move between the fiber bundle releasing position and the fiber bundle holding position according to a translatory movement. - The shape of the
duct 31 is not limited to a tetragonal tube-like. The shape of theduct 31 may be of any shape, for example, a pentagonal tube-like or a hexagonal tube-like as long as theduct 31 can be supported by theroller stand 15 and the fiberbundle holding mechanism 30 can be coupled to theduct 31. - Holding members that hold the roving S in cooperation with the holding
members 34 may be provided separately from the fiber bundle guides 36. - Each locked
portion 42, which is formed in the lockedboard 34c and locked by thecorresponding pin 40a, is not limited to a hole. The lockedportion 42 may be a recess, a groove, or a cutout. - Each locked
board 34c need not be sectoral. The lockedboard 34c may be of any shape as long as the lockedboard 34c includes the lockedportion 42 to be locked by thecorresponding pin 40a and is always in contact with the tip end of thepin 40a in the state in which the holdingmember 34 is in the middle of the movement from the fiber bundle releasing position to the fiber bundle holding position and arranged at the fiber bundle holding position. - Therefore, the present examples and embodiments are to be considered as illustrative and not restrictive and the invention is not to be limited to the details given herein.
Claims (4)
- A spinning machine comprising a plurality of spindles, a drafting unit (10), and a fiber bundle supply interruption device, wherein
the drafting unit (10) includes a back roller set (14) configured by a back bottom roller (14a) and a back upper roller (14b), and a back bottom roller supporting portion (17) which supports the back bottom roller (14a),
the fiber bundle supply interruption device comprises a duct (31) having a length that is greater than or equal to a length of four spindles, and a plurality of fiber bundle holding mechanisms (30) coupled to the duct (31),
each of the fiber bundle holding mechanisms (30) includes:a fiber bundle guide (36);a holding member (34), which cooperates with the fiber bundle guide (36) to hold a fiber bundle to be supplied to the drafting unit (10);a biasing member (38), which biases the holding member (34) from a fiber bundle releasing position to a fiber bundle holding position; andan actuator (40), which switches the holding member (34) between a state in which the holding member (34) is maintained at the fiber bundle releasing position and a state in which the holding member (34) is released from the maintained state toward the fiber bundle holding position,the fiber bundle holding mechanisms (30) are fixed to the duct (31) such that the holding members (34) are arranged at an interval of the length of the spindles and are able to hold the fiber bundles to be supplied to the drafting unit (10) at a position rearward from the back roller set (14) of the drafting unit (10), and
the duct (31) accommodates wiring (43, 44) required for driving the actuator (40),
characterized in that
the duct (31) is fixed on a coupling member (32) which is coupled with the back bottom roller supporting portion (17) in an integrally moveable manner,
the fiber bundle holding mechanisms (30) are fixed to a surface of the duct (31) opposite the coupling member (32), and
the actuator (40) is arranged below a weighting arm (18) of the drafting unit (10) such that a passage through which the fiber bundle passes during the spinning resists the collection of floating fibers. - The spinning machine according to claim 1, wherein the holding member (34) is configured to rotate between the fiber bundle releasing position and the fiber bundle holding position, and the biasing member is a torsion spring (38).
- The spinning machine according to claim 1 or 2, wherein the coupling member (32) is coupled with the back bottom roller supporting portion (17) such that the surface of the duct (31) to which the fiber bundle holding mechanisms (30) are fixed is an upper surface.
- The spinning machine according to claim 3, wherein each of the fiber bundle holding mechanisms (30) is provided for two spindles that form a pair.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013238100A JP5979121B2 (en) | 2013-11-18 | 2013-11-18 | Spindle fiber bundle supply stop device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2873757A1 EP2873757A1 (en) | 2015-05-20 |
EP2873757B1 true EP2873757B1 (en) | 2019-03-06 |
Family
ID=51900133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14191683.3A Not-in-force EP2873757B1 (en) | 2013-11-18 | 2014-11-04 | Spinning machine with a fiber bundle suppply interruption device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2873757B1 (en) |
JP (1) | JP5979121B2 (en) |
CN (1) | CN104651994B (en) |
ES (1) | ES2727510T3 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6332175B2 (en) * | 2015-07-08 | 2018-05-30 | 株式会社豊田自動織機 | Spindle fiber bundle supply stop device |
JP6369406B2 (en) * | 2015-07-08 | 2018-08-08 | 株式会社豊田自動織機 | Spindle fiber bundle supply stop device |
JP2018204121A (en) * | 2017-05-30 | 2018-12-27 | 村田機械株式会社 | Roller unit, draft machine and spinning machine |
CN113502573B (en) * | 2021-09-09 | 2021-11-19 | 南通皓科新材料技术有限公司 | Safety stop device used in spinning twisting process |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59178378U (en) * | 1983-05-09 | 1984-11-29 | 北村 陽司 | Roving gripping and cutting device |
JPS61206679U (en) * | 1985-06-13 | 1986-12-27 | ||
DD268719A1 (en) * | 1988-02-09 | 1989-06-07 | Textima Veb K | LUNTENSPERRVORRICHTUNG |
US5211709A (en) * | 1991-10-09 | 1993-05-18 | Mht, Inc. | Stop motion device for strand processing machine |
Family Cites Families (9)
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US3102378A (en) * | 1961-02-28 | 1963-09-03 | Adams Inc | Textile strand control device |
JPS6333976Y2 (en) * | 1980-02-27 | 1988-09-08 | ||
DE3146380A1 (en) * | 1981-11-23 | 1983-05-26 | Zinser Textilmaschinen Gmbh, 7333 Ebersbach | SPIDER TWINING MACHINE |
DE3526305A1 (en) * | 1985-07-23 | 1987-01-29 | Zinser Textilmaschinen Gmbh | SPIDER |
DD265183A1 (en) * | 1987-09-15 | 1989-02-22 | Textima Veb K | COVER FOR LUNTENSTUETZEN TO STRUCKWERKEN |
DE4109398C1 (en) * | 1991-03-22 | 1992-09-10 | Skf Textilmaschinen-Komponenten Gmbh, 7000 Stuttgart, De | Stop installation for drawing system of spinning machine - has electromagnet integrated into magnetic valve of pneumatic component |
DE4125762C1 (en) | 1991-08-03 | 1992-10-29 | Skf Textilmaschinen-Komponenten Gmbh, 7000 Stuttgart, De | Stop device for roving supply in the event of a yarn breakage - incorporates an electromagnet connected by a yarn break stop motion, used for spinning machine drawing system |
DE4338057C2 (en) * | 1993-11-08 | 1996-08-22 | Skf Textilmasch Komponenten | Thread stop device for textile machines |
DE19642222A1 (en) * | 1996-10-12 | 1998-04-16 | Zinser Textilmaschinen Gmbh | Ring spinner for a cladded yarn |
-
2013
- 2013-11-18 JP JP2013238100A patent/JP5979121B2/en not_active Expired - Fee Related
-
2014
- 2014-11-04 ES ES14191683T patent/ES2727510T3/en active Active
- 2014-11-04 EP EP14191683.3A patent/EP2873757B1/en not_active Not-in-force
- 2014-11-14 CN CN201410644174.1A patent/CN104651994B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59178378U (en) * | 1983-05-09 | 1984-11-29 | 北村 陽司 | Roving gripping and cutting device |
JPS61206679U (en) * | 1985-06-13 | 1986-12-27 | ||
DD268719A1 (en) * | 1988-02-09 | 1989-06-07 | Textima Veb K | LUNTENSPERRVORRICHTUNG |
US5211709A (en) * | 1991-10-09 | 1993-05-18 | Mht, Inc. | Stop motion device for strand processing machine |
Also Published As
Publication number | Publication date |
---|---|
EP2873757A1 (en) | 2015-05-20 |
JP5979121B2 (en) | 2016-08-24 |
ES2727510T3 (en) | 2019-10-16 |
CN104651994A (en) | 2015-05-27 |
JP2015098655A (en) | 2015-05-28 |
CN104651994B (en) | 2017-04-19 |
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