A ROLLER TAKE OFF DEVICE FOR A TEXTILE CARDING MACHINE Technical field
The invention relates to a roller take off device of textile carding machine for setting the radial distance between the redirecting roller and top-doffing roller in addition to setting of radial distance between the top-doffing roller and the bottom- doffing roller. Background Art
In textile preparatory process, the use of carding machine for opening and pre parallelizing of the fibre is known. In such carding machines the fibre material is fed to the feeding arrangement of the carding machine in the form of flocks or laps. The fibre is opened and parallelized during its passage through the wire point clothed feed rollers, licker-in, cylinder and revolving flats of the flat zone of the carding machine. The flat zone comprises plurality of flats clothed with wire points and mounted on chain or belts and driven by suitable means. The flats are guided by a guide in proximity to the wire points of the cylinder. The opened fibre is gathered from the cylinder by a doffer clothed with wire points and converted as a draftable sliver during subsequent passage through the take off and web gathering devices of the carding machine. The sliver thus produced is fed to a can coiler and deposited on to a revolving can kept underneath the revolving coiler plate.
The take off device of the carding machine comprises a redirecting roller, a bottom doffing roller and a top doffing roller and driven by the doffer drive system. The redirecting roller present immediately next to the doffer doffs the fibre material and guide them to the nip formed by the bottom doffing roller and the top-doffing roller. The doffing rollers crushes the fibre material and delivers the same to the web gathering device for the formation of sliver during the subsequent passage through a condenser and a pair of delivery rollers arranged at the delivery end of the carding machine. The web gathering device and the delivery rollers are driven by the drive system of the carding machine.
In a known roller take off device of a carding machine, a redirecting roller is rotatably mounted on anti-friction bearings and supported on both sides of the machine by detaching roller arrangement housing. A bottom-doffing roller rotatably mounted on anti friction bearings and supported on both the sides by detaching roller arrangement housing. The top-doffing roller also rotatably mounted on anti-friction bearings and supported on both the sides of the machine by means of a bracket, said bracket fixed to a fulcrum pin of the detaching roller arrangement housing. In this known device, the radial distance between the bottom-doffing roller and the top- roller is set by means of a setting-screw. Further, a loading mechanism is also provided for loading the top-doffing roller and the bottom-doffing roller to a pre-determined value.
However, in this known roller take off device, it is not possible to adjust the radial distance between the top-doffing roller and the redirecting roller, since these rollers are fixed and cannot be adjusted. Objects of the present invention
Therefore, the primary object of the present invention is to provide a roller take off device for a textile-carding machine having a lateral alignment element to adjust the radial distance between a top-doffing roller and a redirecting roller. An object of the present invention is to provide a roller take off device for a textile-carding machine with a combination of lateral and vertical alignment elements to adjust not only the radial distance between a top-doffing roller and a redirecting roller but also the radial distance between the top-doffing roller and the bottom-doffing roller.
Another object of the present invention is to provide a roller take off device for a textile carding machine to facilitate an effective transfer of web while processing different materials with different processing parameters. Summary of the present invention
Accordingly, the present invention provides a roller take-off device for a textile carding machine, said device comprising a housing member with a frame disposed on either side of the carding machine to provide a primary rotatable support to top, bottom and redirecting doffing rollers, a cylindrical opening disposed in the housing member in the rotatable support area of the bottom-doffing roller, a swiveling bracket with a bottom- doffing-roller passage to rotatably permit the bottom-doffing roller is operably connected to said housing member by a central and peripheral fitment members, a sliding bracket slidably disposed in a sliding-bracket opening of the swiveling bracket, said sliding bracket provided with a top-doffing-roller opening to rotatably permit the top-doffing roller, a crown-bracket mounted on said swiveling bracket, a vertical alignment element disposed on the sliding bracket through the crown-bracket, said vertical alignment element operably connected to said top and bottom rollers to provide vertical radial alignment of upper and bottom doffing rollers, and a lateral alignment element disposed on the frame, said lateral alignment member operably connected to the top-doffing roller and the redirecting roller, to provide a lateral radial alignment between the top-doffing roller and the redirecting roller. Brief description of the diagrams
Fig 1 depicts a view of the roller take off device of the present invention depicting the swiveling bracket connected to the top and bottom doffing rollers and the redirecting roller.
Fig 2 is an exploded view of the roller take off device of the present invention depicting
the lateral and vertical alignment elements of the present invention.
Fig 3 depicts vertical and lateral alignment elements of the roller take off device of the
present invention with directional marks depicting the setting of distance between the
redirecting roller, top-doffing roller and the bottom-doffing roller.
Detailed description of the invention
The roller take off device for a textile-carding machine of the present invention is described in detail with reference to the accompanied Figures 1-3. The roller take off device for a textile-carding machine of the present invention comprises a housing member 12 with a frame disposed on either side of the carding machine to provide a primary rotatable support to top-doffing roller 3, bottom-doffing roller 2 and redirecting rollers 1.
It may be noted here that for the sake of brevity, the Figures 1-3 read along with the corresponding description reflect only one side view of the carding machine. Therefore, a similar set of roller take off device arrangement of the present invention is provided on the other side of the carding machine.
In an embodiment of the present invention, a cylindrical opening 12a disposed in the housing member 12 in the rotatable support area of the bottom-doffing roller 2, to permit a rotatable passage to the bottom-doffing roller 2 on either side of the carding machine.
The swiveling bracket 13 with the bottom doffing roller 2 rotatably supported on anti-friction bearings pivoted on the cylindrical opening 12a of the main housing 12 through the cylindrical hub portion 13b provided on the swivel bracket 13 such that the axis of the bottom doffing roller 2 is in axial alignment with the axis of the cylindrical opening 12a of the main housing 12. The cylindrical hub portion 13b forms the central and peripheral fitment members.
A bracket with fastener 13a is mounted on the housing member 12 in close proximity to the cylindrical opening 12a. The fitment of swivel bracket 13 to the housing member 12 is by means of the fastener 13a. Setting brackets 14 positioned on the main housing 12 at a pre determined location on both ends of the main housing 12 and fixed through the fastener 15.
Swiveling bracket 13 is operably connected to the said setting brackets 14 through the adjusting screw 16. The setting screw acts a lateral alignment element, and adjusting said lateral alignment element facilitates the radial displacement of the swiveling bracket 13 with respect to the axis of the bottom-doffing roller to provide a lateral radial alignment between the top-doffing roller 3 and the redirecting roller 1. This facilitates in adopting the radial distance between the top-doffing roller 3 and the redirecting roller 1 can be set as per the requirement. Once the setting of the swivel bracket 13 is accomplished the swivel bracket 13 is fastened to main housing 12 by fastener 13a passing through the radial slot provided in the said swivel bracket 13.
In an aspect of the present invention, a sliding bracket 17 slidably disposed in a sliding-bracket opening of the swiveling bracket 13, said sliding bracket provided with a top-doffing-roller opening to rotatably permit the top-doffing roller 3, which is extending from the cylindrical opening of the 12a. Swiveling bracket 13 arranged on both the sides of the machine and capable of sliding in a direction perpendicular to the axis of the said bottom-doffing roller 2. A crown-bracket 18 with a pair of arms mounted on said swiveling bracket 13 to form an arch over the said sliding bracket 17. A pass-through hole is disposed on the top portion of the crown-bracket 18. Sliding bracket 17 carrying the said top-doffing roller 3 is connected to the crown-bracket 18 through the spring holder 9. While the top end of said spring holder 9 passes through the pass-through hole provided in the said crown-bracket 18, the bottom end of the said spring holder 9 is fastened to the said sliding bracket 17 and locked by a locking nut 20. Adjusting nut 19 and a clamping nut 21 being attached to the top end of the said spring holder 9. By tightening/loosening of said adjusting nut 19 the radial distance between said top doffing roller 3 and said bottom-doffing roller 2 is aligned to a pre-determined value considering the factors like the material that needs to be processed. Clamping nut 21 is provided to retain the setting.
The spring holder 9 acts as a vertical alignment element disposed on the sliding bracket through the crown-bracket 18, said vertical alignment element operably connected to said top-doffing roller 3 to provide vertical radial alignment of top-doffing roller 3 and bottom-doffing roller 2.
A loading means comprising compression spring 8, spring holder 9 lock nut 11 and spring holder9 is disposed through the pass-though hole of the crown bracket 18, in a known way, for the loading the top-doffing roller 3 and the bottom-doffing roller 2, to a pre-determined value, depending upon the factors like the material that needs to be processed. The loading means adopted in the present invention to exert a desired load on the top-doffing roller 3 is a spring 8, which is attached to spring holder 9 and crown- bracket 18.
It is to be understood here that as an exemplary embodiment adjusting screw is used to adjust the radial distances between the top doffing roller and the redirecting roller. It is within the scope of the present invention to use other adjusting means such as pneumatic cylinder or a hydraulic cylinder.
It may also be noted here that the said redirecting roller 1, bottom-doffing roller 2 and the top-doffing roller 3 of the roller take off device of the present invention are driven by the doffer drive system in a known way.
In another aspect of the present invention, the working of the roller take off device of the present invention is described. Lock nut 21 of the roller take off device is loosened and the radial distance between the said bottom-doffing roller 2 and the said top doffing roller 3 is set to a pre-determined value by adjusting the said adjusting nut 19 and locked by the said lock nut 21. Subsequently the fastener 13a, which passes through, the radial slot provided on the said swivel bracket 13 is loosened. Subsequently, with the help of the adjusting screw 16, the radial distance between the said redirecting roller 1 and the said top-doffing roller 3 is set according to the requirement. After completion of the setting the fastener 13a is tightened there by swivel bracket 13 is fitted to the main housing 12.
Advantage of the invention
The roller take off device of the present invention facilitates adjusting of the radial distance between the top doffing roller and the redirecting roller in addition to the radial distance between the bottom doffing roller and top doffing roller as per the requirement. This facilitates in the effective web transfer while processing different materials with different processing parameters due to the fact that the radial distance between the top doffing roller and the re directing roller is one of the important aspect for the proper transport of the fibre material.

We claim:
1. A roller take-off device for a textile carding machine, said device comprising main housing (12) disposed on both LH and RH side of the carding machine to provide a primary rotatable support to top-doffing roller (3) bottom-doffing roller (2) and redirecting roller (1), and setting means to adjust the radial and vertical distance between the above said rollers, characterized in that said setting means comprises a swiveling bracket (13), sliding bracket (17), crown-bracket (18), spring holder (9) and setting bracket (14).
2. The roller take off device as claimed in claim 1, wherein said swiveling bracket (13) having a sliding bracket opening disposed to slidably support the sliding bracket (17) which rotatably support the top doffing roller (3), wherein the swiveling bracket (13) is pivoted to the main housing (12) and is disposed to rotatably support the bottom-doffing roller (2).
3. The roller take off device as claimed in claim 1 and 2,wherein the cylindrical hub portion (13b) of the swiveling bracket (13) is pivoted to the cylindrical passage opening (12a) of the main housing (12).
4. The roller take off device as claimed in claim 1, wherein the crown-bracket (18) with an upper passage opening is mounted on the swiveling bracket (13),
5. The roller take off device as claimed in claim 1 and 2, wherein the sliding bracket (17) is operably connected to the said crown-bracket (18) by the spring holder (9), wherein one end of the spring holder (9) is fastened to the sliding bracket (17) and the other end passes through upper passage opening of the crown-bracket (18).
6. The roller take off device as claimed in claim 1, wherein a spring (8) is disposed in between the spring holder (9) and the crown-bracket (18) .
7. The roller take off device as claimed in claim 1, wherein a setting bracket (14) is fixed to the main housing (12), wherein the said swiveling bracket (13) is operably connected to the setting bracket (14) through the adjusting screw (16).