Claims
- 1. A roving winding apparatus applied to a roving frame to produce roving bobbins, wherein the apparatus is provided with a plurality of draft parts and corresponding bobbin wheels, a bobbin shaft for driving said bobbin wheels, an elongated bobbin rail on which said bobbin shaft is rotatably mounted along the longitudinal direction thereof, a lifting motion mechanism for lifting said bobbin rail, a main driving motor for driving said draft parts at a predetermined rotational speed, said draft parts being provided with a common bottom front roller, and said lifting motion mechanism being provided with a mechanism for changing over a direction of displacement of said bobbin rail, comprising:
- means for detecting a rotational angle of said bottom front roller and producing a digital signal representative of the rotational angle of said bottom front roller;
- means for inputting data required to compute at least a diameter of said roving bobbin;
- means for storing said data supplied from said input means;
- means for computing the diameter of said roving bobbin based upon said stored data;
- a digitally controlled motor for rotating the bobbin wheel, arranged independently from said main driving motor through said bobbin shaft; and
- digital control means for controlling a rotation angle of said digitally controlled motor based upon an output signal of said means for computing said diameter of the roving bobbin, in a relation with an output of said means for detecting said rotational angle of said bottom front roller;
- whereby said digitally controlled motor rotates said bobbin wheel with said rotation angle computed by an output of said means for computing the diameter of said roving bobbin in relation to said digital signal of said sensing means, so that the balance between the winding length of said roving relying upon said rotation angle of said bobbin wheel on said roving bobbin and the delivery length of said roving relying upon said rotational angle of said bottom front roller is maintained.
- 2. A roving winding apparatus according to claim 1, wherein:
- said bobbin rail lifting mechanism is provided with a lifter shaft for alternately displacing said bobbin rail upward and downward, said lifter shaft being driven by transmitting a rotation of said digitally controlled motor through said displacing direction change-over mechanism of said bobbin rail.
- 3. A roving winding apparatus according to claim 2, further comprising:
- a differential gear mechanism capable of transmitting a rotation of said main motor to said bobbin shaft as a power transmission system, said differential gear mechanism being provided with an input shaft driven by said digitally controlled motor.
- 4. A roving winding apparatus according to claim 3, further comprising:
- a clutch means arranged at a position between said digitally controlled motor and said input shaft of said differential gear mechanism.
- 5. A roving winding apparatus according to claim 2, wherein:
- said change-over mechanism comprises a gear box, a pair of supporting shafts rigidly mounted on said gear box, a change-over rod shaft slidably supported by said supporting shafts along the axial direction thereof;
- a change-over drive mechanism for actuating said change-over rod shaft;
- a change-over wheel rotatably mounted on said change-over rod shaft in such a manner that a displacement thereof along the axial direction of said change-over rod shaft is restricted, said change-over wheel being provided with annular teeth at both sides thereof and further meshed with an intermediate gear for transmitting a driving power thereof to said lifting motion mechanism;
- a pair of driven gears rotatably mounted on said change-over rod shaft at both sides of said change-over wheel, each of said driven gears being provided with an annular gear formed on a side thereof facing said change-over wheel while meshing with corresponding annular teeth of said change-over wheel;
- a control shaft indirectly driven by said digitally controlled motor; and
- a pair of drive gears rigidly mounted on said control shaft and meshing with a corresponding one of said driven gears.
- 6. A roving winding apparatus according to claim 5, wherein:
- said change-over drive mechanism is provided with an extended shaft connected to said change-over rod, as one body, and comprises a change-over shaft body provided with an engaging body having a pair of engaging portions formed axially on both sides thereof:
- an energizing means for alternately energizing said change-over shaft body toward said change-over direction of said change-over wheel:
- a pair of stoppers capable of alternately engaging a corresponding one of said engaging portions of said engaging body; and
- an engaging change-over device provided with a function of alternately engaging either one of said stoppers with a corresponding one of said engaging portions of said engaging body when the direction of lifting motion of said bobbin rail is to be changed.
- 7. A roving winding apparatus according to claim 6, wherein:
- said energizing means is a compressed air cylinder provided with a cylindrical body and a piston rod axially movable in said cylindrical body, said piston rod being connected to said change-over shaft body.
- 8. A roving winding apparatus according to claim 6, wherein:
- said energizing means has a compressed air cylinder rigidly mounted on a machine frame of said roving frame;
- a piston rod axially movable in said cylinder; and
- a piston ring rigidly mounted on said piston rod in said cylinder, whereby said cylinder is divided into two chambers, and a pair of resilient springs disposed in a corresponding one of said chambers.
- 9. A roving winding apparatus according to claim 6, wherein:
- said engaging change-over device comprises a pair of L-shaped engaging levers disposed in a swingable condition and each provided with a stopper capable of engaging with a corresponding one of said engaging portions of said change-over driving device;
- a spring means for energizing said engaging levers toward respective directions for alternately engaging a corresponding one of said stoppers thereof with said engaging portions;
- an actuation rod movable toward said swing directions of said engaging levers, said actuation rod being provided with a pair of press pins capable of alternately swinging a corresponding one of said stoppers toward a direction of disengagement from a corresponding one of said engaging portions by selectively coming into contact with a corresponding one of said engaging levers;
- a compressed air cylinder for alternately moving said change-over actuation rod along the axial direction thereof; and
- a change-over valve for actuating said compressed air cylinder when said change-over motion of said device is required.
- 10. A roving winding apparatus according to claim 6, wherein:
- said change-over drive mechanism is provided with an engaging body rotatably mounted on said change-over rod, said engaging body being provided with a pair of engaging portions and a sector gear formed at a peripheral surface thereof;
- said change-over device being provided with a pair of stoppers rigidly mounted at positions sandwiching said engaging body and capable of engaging a corresponding one of said engaging portions, an aperture being formed in said engaging body at a position at which one of said stoppers is engagable therein by turning said engaging body in a corresponding direction;
- a rack meshed with said sector gear;
- a compressed air cylinder for alternately displacing said rack in both directions therealong; and
- a change-over valve for changing the actuation direction of said compressed air cylinder.
- 11. A roving winding apparatus according to claim 1, further comprising:
- a differential gear mechanism capable of transmitting a rotation of said main motor to said bobbin shaft, said differential gear mechanism being provided with an input shaft driven by said digitally controlled motor.
- 12. A roving winding apparatus applied to a roving frame to produce roving bobbins, wherein the apparatus is provided with a plurality of draft parts and corresponding bobbin wheels, a bobbin shaft for driving said bobbin wheels, an elongated bobbin rail on which said bobbin shaft is rotatably mounted along the longitudinal direction thereof, a lifting motion mechanism for lifting said bobbin rail, a main motor for driving said draft parts at a predetermined rotational speed, said draft parts being provided with a common bottom front roller, and said lifting motion mechanism being provided with a change over mechanism for changing over a direction of displacement of said bobbin rail, comprising:
- digital control means for producing a signal based on the combination of a sensed rotation angle of the bottom front roller and a computed diameter of the roving bobbin;
- a digitally controlled motor for rotating the bobbin wheel, actuated by said signal issued from said digital control means and arranged independently from said main motor, said digitally controlled motor being actuated through a rotation angle for thereby rotating the bobbin wheel a predetermined rotation angle corresponding to the rotation angle of the bottom front roller and in accordance with the diameter of the roving bobbin, whereby the rotation angle of said bobbin wheel is controlled to a condition precisely corresponding to said rotation angle of said front roller so that the balance between the winding length of the roving on said roving bobbin and the delivery length of the roving is maintained;
- said bobbin rail lifting mechanism including a lifter shaft for alternately displacing said bobbin rail upward and downward, said lifter shaft being driven by transmitting a rotation of said digitally controlled motor through said displacing direction change-over mechanism of said bobbin rail;
- said change-over mechanism including a gear box, a pair of supporting shafts rigidly mounted on said gear box, a change-over rod shaft slidably supported by said supporting shafts along the axial direction thereof;
- a change-over drive mechanism for actuating said change-over rod shaft;
- a change-over wheel rotatably mounted on said change-over rod shaft in such a manner that a displacement thereof along the axial direction of said change-over rod shaft is restricted, said change-over wheel being provided with annular teeth at both sides thereof and further meshed with an intermediate gear for transmitting a driving power thereof to said lifting motion mechanism;
- a pair of driven gears rotatably mounted on said pair of supporting shafts at both sides of said change-over wheel, each of said driven gears being provided with an annular gear formed on a side thereof facing said change-over wheel while meshing with corresponding annular teeth of said change-over wheel;
- a control shaft indirectly driven by said digitally controlled motor; and
- a pair of drive gears rigidly mounted on said control shaft and meshing with a corresponding one of said driven gears.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-170711 |
Jun 1989 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/545,613, filed Jun. 29, 1990 now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (7)
Number |
Date |
Country |
3713350 |
Nov 1987 |
DEX |
2621605 |
Oct 1987 |
FRX |
52-13376 |
Mar 1977 |
JPX |
52-48652 |
Dec 1977 |
JPX |
63-264923 |
Jan 1988 |
JPX |
327273 |
May 1969 |
SUX |
199221 |
Jun 1923 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
545613 |
Jun 1990 |
|