Claims
- 1. A method for exchanging exhausted roving bobbins for full packaged roving bobbins applied to a conventional ring spinning frame provided with a creel in each side thereof, a plurality of bobbin hangers arranged on said creel in two rows so that each front bobbin hanger faces a corresponding back bobbin hanger, further provided with at least one supply rail extending in parallel to said creel at a position in front thereof, comprising
- a preparatory operation of carrying an alignment of a plurality of bobbin hangers holding full packaged roving bobbins to be exchanged for said exhausted roving bobbins, and two auxiliary bobbin hangers not holding roving bobbins to a position on said supply rail, in a condition such that said two auxiliary bobbin holders occupy a position upstream of said alignment of bobbin hangers,
- a first unit roving bobbin exchanging operation comprising
- a first step of taking-off a first pair of exhausted roving bobbins suspended from a first pair of front and back bobbin hangers, facing each other, on said creel, to which is to be applied a first unit operation in a series of unit roving bobbin exchanging operations, when said roving bobbin exchanging operation is required,
- a second step of displacing said exhausted roving bobbins taken from said first pair of front and back bobbin hangers of said creel, to respective positions directly below said auxiliary bobbin hangers, and then transferring said exhausted roving bobbins to the respective one of said auxiliary bobbin hangers,
- a third step of taking-off a pair of full packaged roving bobbins from a first pair of adjacent bobbin hangers located downstream of said auxiliary bobbin hangers on said supply rail, and then displacing said full packaged roving bobbins at the respective position directly below said first pair of front and back bobbin hangers,
- successive unit operations, stepwisely applied to the last pair of front and back bobbin hangers, facing each other on said creel, to which said unit roving bobbin exchanging operation is to be applied, comprising,
- a first step of taking-off a pair of exhausted roving bobbins suspended from a pair of front and back bobbin hangers, facing each other, on said creel, which follow a pair of front and back bobbin hangers on said creel, completing said unit roving bobbin exchanging operation by an immediately previous unit operation,
- a second step of displacing said exhausted roving bobbins taken from said pair of front and back bobbin hangers of said creel to the respective position directly below said bobbin hanger on said supply rail, from which a pair of full packaged roving bobbins were taken-off by the immediately previous unit roving bobbin exchanging operation, and then transferring said exhausted roving bobbins to the respective one of said bobbin hangers of said supply rail,
- a third step of taking-off a pair of full packaged roving bobbins from an adjacent pair of bobbin hangers located immediately downstream of said bobbin hangers, to which said exhausted roving bobbins were transferred by said second step, and then displacing said full packaged roving bobbins at the respective positions directly below said pair of front and back bobbin hangers on said creel, from which exhausted roving bobbins were taken by said first step operation,
- wherein, during each unit operation, an axial distance between two roving bobbins under operation is changed between an axial distance between said front bobbin hanger and said back bobbin hanger, facing each other, on said creel, and an axial distance between two adjacent bobbin hangers on said supply rail.
- 2. The method for exchanging exhausted roving bobbins for full packaged roving bobbins according to claim 1, wherein said auxiliary roving bobbins are replaced by a pair of bobbin holders for temporarily reserving said exhausted roving bobbins taken from said first pair of bobbin hangers on said creel, which are disposed at such positions beside said supply rail.
- 3. The method for exchanging exhausted roving bobbins for full packaged roving bobbins according to claim 1, wherein said auxiliary bobbin hangers and the alignment of bobbin hangers from which full packaged roving bobbins are suspended are carried to said supply position of said supply rail by transporting a carrier holding these bobbin hangers.
- 4. Apparatus for exchanging exhausted roving bobbins for full packaged roving bobbins, applied to a conventional ring spinning frame provided with a creel in each side thereof, a plurality of bobbin hangers being arranged on said creel in two rows so that each front bobbin hangers faces a corresponding back bobbin hanger, further provided with at least one supply rail extending in parallel to said creel at a position in front thereof comprising,
- a peg unit provided with a pair of pegs detachably holding roving bobbins respectively, a telescopic mechanism mounting those pegs in a condition capable of changing an axial distance therebetween from an axial distance between said front bobbin hanger and said back bobbin hanger facing each other on said creel (b) to an axial distance between two adjacent bobbin hangers on said supply rail (a), and vice versa,
- a lifting body supporting said peg unit
- means for displacing said peg unit to a position by which said pair of pegs take the respective positions directly below the corresponding pair of said front and back bobbin hangers, facing each other on said creel, and the respective positions directly below the corresponding adjacent two bobbin hangers on said supply rail, said displacing means being mounted on said lifting body,
- lifting means for vertically displacing said lifting body upwards and downwards to and from the corresponding pair of said front and back bobbin hangers, facing each other on said creel when said pegs of said peg unit take a position directly below said front and back bobbin hangers on said creel, respectively, and for vertically displacing said lifting body upwards and downwards to and from the corresponding adjacent two bobbin hangers on said supply rail when said pegs of said peg unit take a position right below said adjacent two bobbin hangers on said supply rail, respectively,
- means for controlling a sequential action composed of motions of said telescopic mechanism of said peg unit, said displacing means and said lifting means,
- a main body mounting said lifting body of said lifting means,
- a displacing mechanism for stepwisely displacing said body along said creel of said spinning frame and stopping said unit at the respective position for carrying out a unit roving bobbin exchanging operation applied to said pair of front and back bobbin hangers, facing each other on said creel, to which such a unit roving bobbin exchanging operation is to be applied.
- 5. The roving bobbin exchanging apparatus according to claim 4, further comprising a pair of bobbin holders disposed thereon, for temporarily holding two exhausted roving bobbins taken from said spinning frame in the first unit roving bobbin exchanging operation.
- 6. The roving bobbin exchanging apparatus according to claim 4, wherein said telescopic mechanism comprises
- a slide base,
- a first slider slidably mounted on said slide base along a longitudinal direction of said slide base,
- a second slider slidably mounted on said first slider along said first slider,
- means for restricting a possible change of an axial distance between said pegs of said peg unit during a relative displacing motion of said first and second sliders,
- means for actuating said relative displacing motion of said first and second slider to said slide base.
- 7. The roving bobbin exchanging apparatus according to claim 6, wherein said slide base of said telescopic mechanism is provided with an aperture located on a longitudinal centerline thereof, and said actuating means of said telescopic mechanism comprises
- a main shaft coaxially and rotatably passing through said aperture of said slide base,
- a first gear secured to said main shaft by a key at a position between said slide base and said first slide plate,
- means for driving said main shaft,
- a first rack rigidly formed on said first slider from a bottom side along a longitudinal direction of said first slider, and meshing with said first gear,
- a pinion gear rotatably mounted on said first slider at a position on a longitudinal center line of said first slider,
- a long groove formed on said first slider in parallel to said longitudinal center line of said first slider,
- a second rack extended along a longitudinal center line of said first slider and secured to said slide base through said long groove of said first slider, located at a position between said first slider and said second slider and meshing with said pinion gear,
- a third rack extended along a longitudinal center line of said first slider and secured to said second slider from a bottom side thereof, and meshing with said pinion gear.
- 8. The roving bobbin exchanging apparatus according to claim 7, wherein said means for driving said main shaft of said actuating means of said telescopic mechanism is a drive motor provided with a motor shaft which functions as said main shaft, said drive motor being secured to said slide base from a bottom side thereof.
- 9. The roving bobbin exchanging apparatus according to claim 7, wherein said means for driving said first gear of said actuating means of said telescopic mechanism, comprises
- a supporting body for supporting said peg units, rigidly mounted on said lifting body,
- a hollow shaft rotatably held by said supporting body and rigidly secured to said slide base from a bottom side thereof coaxially with said aperture of said slide base,
- a vertical shaft coaxially and rotatably disposed in said hollow shaft, said vertical shaft functioning as said main shaft of said actuating means of said telescopic mechanism,
- means for driving said vertical shaft, disposed at a bottom portion of said hollow shaft.
- 10. The roving bobbin exchanging apparatus according to claim 9, wherein said displacing means comprises
- an auxiliary body formed in said lifting body supporting said peg unit,
- a second motor rigidly mounted on said auxiliary body and provided with a motor shaft,
- a second gear secured to said motor shaft of said second motor,
- a gear coaxially formed at an outside top end portion of said hollow shaft and meshing with said second gear.
- 11. The roving bobbin exchanging apparatus according to claim 6, wherein said means for restricting a possible change of an axial distance between said first and second pegs of said peg unit, comprises
- a first base element for a first peg, rigidly mounted on said second slider at a front end position thereof, and a second base element for a second peg, slidably mounted on said second slider in the longitudinal direction thereof,
- an engaging member secured to said second base and projecting outside therefrom,
- a stopper surface formed in a side wall of said first slider, and capable of contacting said engaging member,
- a stop pin disposed on said slide base at forward end portion thereof, and capable of contacting said engaging member,
- whereby, when said first and second sliders are relatively displaced forward to said slide base by the action of said actuating means of said telescopic mechanism, said engaging member contacts said stop pin of said slide base, during said forward displacing motion of said first and second sliders, so that a further displacing motion of said second peg is stopped, and when said first and second sliders are stopped at the front ends of their forward displacement motion relative to said slide base after said first and second sliders are further displaced forward relatively to said slide base,
- the axial distance between said first and second pegs becomes identical to a distance (b) which is an axial distance between a pair of a front bobbin hanger and a back bobbin hanger, facing each other, on said creel of said spinning frame, on the other hand, when said first and second sliders are displaced rearwards relative to said slide base, said engaging member of said second peg contacts said stopper surface of said first slider during said rearward displacing motion of said first and second sliders, after creating a condition such that said first and second sliders are still displaced rearward while decreasing an axial distance between said first and second pegs, and when said first and second sliders come to the terminals of their rearward displacement motion, said axial distance between said first and second pegs becomes identical to a distance (a) which is an axial distance between two adjacent bobbin hangers on said supply rail.
- 12. The roving bobbin exchanging apparatus according to claim 6, wherein said means for restricting a possible change of an axial distance between said first and second pegs of said peg units, comprises
- a first base element for a first peg, rigidly mounted on said second slider at a front end position thereof, and a second base element for a second peg, slidably mounted on said second slider in the longitudinal direction thereof,
- a spring continuously pulling said second base element for said second peg in the forward direction,
- a stopper secured to a second slider for restricting a forward displacement of said second base element for said second peg,
- an engaging member secured to said second base element for said second peg and projecting outside therefrom,
- a stop pin disposed on said slide base at forward end portion thereof, and capable of contacting said engaging member,
- whereby, when said first and second sliders are relatively displaced forward to said slide base by the action of said actuating means for said telescopic mechanism, said engaging member contacts said stop pin of said slide base, during said forward displacing motion of said first and second sliders, so that a further displacing motion of said second peg is stopped, and when said first and second sliders are stopped at the front ends of their forward displacement motion relative to said slide base after said first and second sliders are further displaced forward relative to said slide base, the axial distance between said first and second pegs becomes identical to a distance (b) which is an axial distance between a pair of a front bobbin hanger and a back bobbin hanger, facing each other, on said creel of spinning frame, on the other hand, when said first and second sliders are displaced rearwards relative to said slide base,
- said first and second sliders are still displaced rearwards while decreasing said axial distance between said first and second pegs, and during such a rearward displacement motion of said first and second sliders, said stopper of said second slide contacts said second base member for said second peg and restricts a free displacement thereof by said stop pin of said slide base, thereafter said axial distance between said first and second pegs becomes identical to said distance (a) between two adjacent bobbin hangers on said supply rail, during a rearward displacement of said first and second sliders, and finally, said rearward displacement motion of said first and second sliders is stopped while maintaining this axial distance between said first and second pegs.
- 13. The roving bobbin exchanging apparatus according to claim 4, wherein said displacing means comprises a plurality of crank elements forming parts of a parallel crank linkage mechanism for displacing said slide base of said telescopic mechanism along the longitudinal direction of said supply rail by a distance (2C) which is equal to twice said axial distance (C) between two adjacent bobbin hangers on said supply rail, said linkage mechanism is formed by said plurality of crank elements in combination with said slide base and said lifting body, wherein upper end portions of said crank elements are turnably mounted at said slide base, and lower end portions of said crank elements are turnably mounted at said lifting body, and means for actuating said parallel linkage mechanism.
Priority Claims (1)
Number |
Date |
Country |
Kind |
61-202734 |
Aug 1986 |
JPX |
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Parent Case Info
This is a continuation-in-part of application Ser. No. 091,209, filed Aug. 31, 1987 and now abandoned.
US Referenced Citations (7)
Continuation in Parts (1)
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Number |
Date |
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Parent |
91209 |
Aug 1987 |
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