DESC:FIELD OF THE INVENTION
The present invention relates to the sliver filling station of spinning preparatory machines. The invention particularly relates to can coiler position adjustment mechanism for providing an optimum gap between the sliver coils and the coiler can outer circumference in the spinning preparatory machines.
BACKGROUND OF THE INVENTION
In spinning preparatory machines like Draw frame, Combing and Carding or same like machines have drafting area for reducing the sliver thickness and also a coil delivery area which fill the sliver into sliver can. Sliver cans are placed over the rotating can plate beneath the coil delivery head. The coiler plate of the coil delivery head and said can plate are rotated in the same vertical axis by the suitable drive means and so that sliver is filled in the sliver can. For proper and smooth unwinding of the filled sliver coil in subsequent machines, there should be optimum gap in between the inner walls of sliver can and sliver coils. This is essential for trouble free performance during the next process while drawing the sliver from the can. Further the gap variation depends on the count (linear density) and type of material which is processed. In addition, other factors such as can content, and speed of the machine also affect the optimum gap between the sliver coil and inner wall of the sliver can. So, in concern to these parameters, each and every time of changing material count, the gap must be optimized for seamless performance.
The optimum gap can be varied by adjusting the distance between the radial center of coiler head and the radial center of coiler can. In sense to adjust the radial center of the coiler can, the bottom plate can be adjusted in order to achieve a predetermined distance between the coiler head and coiler can. This action of adjusting or changing the distance is termed as eccentricity. Normally the coiler head radial center point is always held inside the peripheral circumference of the coiler can, so that the adjustment of the eccentricity varies the optimum gap to the required amount within the can circumference.
In known machines, to achieve the optimum gap an adjusting arrangement is employed for altering the eccentricity (altering the distance between the central axis of the can and the axis of coiler), by a screw rod arrangement. Rotating the screw rod moves the base plate of the can drive arrangement. Herein addition to the eccentric adjustment, dismantling and assembling of a number of parts like covers and re-tensioning / realigning belts or gears of can drives are also required for better optimization of settings. A major disadvantage of the screw rod arrangement is that for a complete rotation of the screw rod, it moves exactly the same linear distance which is equal to the Screw Pitch which is very much smaller. This creates high fatigue for the operator who prefers to change the can to coiler eccentricity in a considerable amount during the process change. This arrangement requires more accuracy and time consuming, in addition it require complex adjustment points as well as it is not a simple mechanism.
Therefore, there exists a need for a can coiler position adjustment mechanism which provides an optimum gap between the sliver coils and the coiler can outer circumference, overcoming all the drawbacks of the existing mechanisms.
OBJECTIVE OF THE INVENTION
These objectives are provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This objective are not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
An important object of the invention aims at providing a solution for the shortcomings of the adjusting arrangement of the known machines.
The main object of the invention is to provide an optimum gap between the sliver coils and coiler can in relation to deciding factors like count or type of fibre material.
Another object of the invention is to provide a simple mechanism to adjust the distance between the coiler head radial center and to the coiler can radial center.
Yet another object of the invention is to provide a simple actuator or adjusting means to vary the distance between coiler can radial center and coiler head radial center.
Object of the present invention is not limited to the above-mentioned problem. Other technical problems that are not mentioned will become apparent to those skilled in the art from the following description.
SUMMARY OF THE INVENTION
According to an aspect of the invention, a can coiler position adjustment mechanism for providing an optimum gap between a sliver coils and a coiler can outer circumference, comprising of a can plate having a can plate radial center mounted on a base plate, a coiler head having a coiler head radial center, wherein the can plate and the coiler head having a maximum length or a minimum length between the can plate radial center and the coiler head radial center. Further the mechanism includes, a cam disc having a rotary pivot center coupled to the base plate through a mounting bracket, wherein the rotary action of cam disc is converted into the linear motion of the coiler base plate, so that the maximum length or the minimum length between can plate radial center and the coiler head radial center is adjustable. For every adjustment angle from 0º to 180º degree of cam disc, the distance between the can plate radial center and the coiler head radial center changes between the maximum length and the minimum length.
Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawing, illustrating by way of example the principles of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
For a more detailed understanding of this invention, reference is made to the accompanying drawings in which:
Figure 1a & 1b shows can coiler position adjustment mechanism with the maximum length (e1) and minimum length (e2) between the can plate radial center (C3) and the coiler head radial center (C2), according to an embodiment of the present invention; and
Figure 2 shows the actuating eccentricity arrangement with a cam disc and its rotary pivot center (C4), according to an embodiment of the present invention.
Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, and features.
DETAILED DESCRIPTION OF THE INVENTION
The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
The present invention relates to the sliver filling can arrangement in the sliver delivery area of the spinning preparatory machine. Spinning preparatory machine delivers the sliver into a storage can by means of coiler heads. In the spinning preparatory machines, it is necessary to ensure optimum gap between sliver coils and coiler can outer circumference to overcome quality issues during further processing of said sliver material.
Figure 1 shows can coiler position adjustment mechanism. Accordingly, the mechanism for providing an optimum gap between a sliver coils and a coiler can outer circumference, comprising of a rotary can plate (1) having a can plate radial center (C3) mounted on a base plate (2) and a coiler head having a coiler head radial center (C2). The filling sliver can is normally placed over the said rotary can plate (1) to receive the delivered sliver coils from the coiler head of the machine. The can plate (1) and the coiler head having a maximum length (e1) or a minimum length (e2) between the can plate radial center (C3) and the coiler head radial center (C2). Further the mechanism comprises a cam disc (7) having a rotary pivot center (C4) coupled to the base plate (2) through a mounting bracket (9). The rotary cam disc (7) is pivotably mounted at the pivot center (C4) and the base plate (2) can be movable in reciprocal direction in relate to the said pivot center (C4). All the centers viz. can plate radial center (C3), the coiler head radial center (C2) and the rotary pivot center (C4) are in a common plane.
A drive transmission means (3) is provided to receive the drive from the prime mover (not shown) to drive the rotary can plate (1). The transmission means (3) is preferably a timing belt / v-belt / poly-v belt or chain. A tensioning means is provided to offer necessary tension to the said transmission means (3). Said tensioning means are generally a gas spring/ pneumatic accumulator/ spring loaded accumulator. Tensioning means or load compensatory device are provided to adjustment the position of the can plate more securely. A plurality of guide means (5, 6) are provided in the base plate (2) to provide a guidance during adjustment of said base plate.
Additionally, the belt tension roller (8) has radial center (C5), which is fixed at a single point on a movable tensioner plate (10) guided by the pins (11, 12) fixed on the base plate (2). One end of the gas spring with pre-defined stroke length is mounted on the tensioner plate (10) and the other end on the base plate (2) and therefore the tension of the endless belt is maintained at any eccentric length in between e1 and e2. The gas spring tension compensates the load during the eccentric length adjustment.
Further, the mechanism comprising of a graduated scale (S) with eccentricity values either mounted on the running base plate (2) or to the base for easy identification of the setting measurement values. Corresponding pointer (P) is provided in the base plate to read the graduation markings of the scale (S).
Figure 2 shows the actuating eccentricity arrangement with a cam disc and its rotary pivot center (C4), according to an embodiment of the present invention. The rotary cam disc (7) having eccentricity (e) to the rotary pivot center (C4) provides displacement twice the eccentricity (2e) for 180º rotation of rotary cam disc. Eccentricity (e) is the distance between the central cam disc axis and the rotary pivot center (C4). The rotary pivot center (C4) acts as a fixed pivot center during cam disc rotation.
In operation, the sliver filling can is placed over the rotary can plate but below the coiler head in a manner that the radial center of coiler can coincides. When the eccentricity adjustment requires, said rotary cam disc (7) is operated by an operator by a rotating means. Rotating means can be a mechanical wrench, or an automated wrench or a rotating handle or any known tool in the art which can provide rotation to the cam disc. Cam disc (7) is rotated either in clockwise or counterclockwise direction with respect to the rotary pivot center (C4) to actuate the said base plate (2). The rotary action of cam disc (7) is converted into the linear motion of the coiler base plate (2), so that the maximum length (e1) or the minimum length (e2) between can plate radial center (C3) and the coiler head radial center (C2) is adjustable. For every adjustment angle from 0º to 180º degree of cam disc, the distance between the can plate radial center (C3) and the coiler head radial center (C2) changes between the maximum length (e1) and the minimum length (e2).
According to an embodiment of the present invention, to adjust the can plate radial center axis (C3) with respect to the coiler head radial center axis (C2), the cam disc (7) is rotated by using a hexagonal socket wrench in either clockwise or anticlockwise direction depending on the requirement with respect to the cam disc pivot center axis (C4). During adjustment, rotating the wrench in clockwise direction makes the cam (7) to re-center towards left to right side. Since the cam disc (7) is directly connected with the can plate (1) through a mounting bracket (9), the movement of cam disc (7) from left to right side over an angle of 0º to 180º makes the can plate (1) to move in same direction and so the can plate radial center axis (C3) will move towards coiler head radial center axis. Figure 1a shows the left most position of the can plate (1) when the cam disc (7) is at the left position at an angle 0º. Whereas the figure 1b shows the right most position of the can plate (1) when the cam disc (7) is at the right most position at the maximum angle 180º. Thus, for every adjustment angle from 0º to180º degree of eccentric cam disc (7), the distance between the can plate radial center (C3) and the coiler head radial center (C2) changes between the maximum length (e1) and the minimum length (e2). Thereby the maximum length (e1) shows the minimum distance between coiler head and circular can peripheral circumference, whereas the minimum length (e2) shows the maximum distance between coiler head and circular can peripheral circumference.
The invention provides simple and versatile mechanism means to adjust the distance between the coiler head and coiler can to ensure optimum gap by way of very simple actuating mechanism. Thereby it over comes the known undesirable disadvantages in reliable manner with higher accuracy. Thus, the invention offers a single horizontal actuating switch to adjust the eccentricity (e) as of definitive length required with ease of operation.
This mechanism requires no additional work other than rotating the cam disc through at most half a rotation which covers the entire range of all the required can to coiler axis eccentric distances. Thus, the invention provides simple and cost effective solution that offers enhanced user friendliness to the operator. Also, mechanism helps in maintaining the same can to coiler eccentricity values for all machines which process the same material at same delivery speed with minimum effort.
In the above detailed description, reference is made to the accompanying drawings that form a part thereof, and illustrate the best mode presently contemplated for carrying out the invention. However, such description should not be considered as any limitation of scope of the present unit. The structure thus conceived in the present description is susceptible of numerous modifications and variations, all the details may furthermore be replaced with elements having technical equivalence. In practice the materials and dimensions may be any according to the requirements, which will still be comprised within its true spirit. The embodiments shown herein are only exemplary. And further embodiments are possible within the scope of the invention.

,CLAIMS:
1. A can coiler position adjustment mechanism for providing an optimum gap between a sliver coils and a coiler can outer circumference, comprising of:
a can plate having a can plate radial center (C3) mounted on a base plate;
a coiler head having a coiler head radial center (C2),
wherein the can plate and the coiler head having a maximum length (e1) or a minimum length (e2) between the can plate radial center (C3) and the coiler head radial center (C2);
characterized in that,
a cam disc having a rotary pivot center (C4) coupled to the base plate through a mounting bracket,
wherein the rotary action of cam disc is converted into the linear motion of the coiler base plate, so that the maximum length (e1) or the minimum length (e2) between can plate radial center (C3) and the coiler head radial center (C2) is adjustable,
wherein for every adjustment angle from 0º to 180º degree of cam disc, the distance between the can plate radial center (C3) and the coiler head radial center (C2) changes between the maximum length (e1) and the minimum length (e2).
2. The can coiler position adjustment mechanism as claimed in claim 1, wherein the rotary pivot center (C4) is a fixed pivot center.
3. The can coiler position adjustment mechanism as claimed in claim 1, wherein the rotary cam disc having eccentricity (e) to the rotary pivot center (C4) provides displacement twice the eccentricity (2e) for 180º rotation of rotary cam disc.
4. The can coiler position adjustment mechanism as claimed in claim 3, wherein eccentricity (e) is the distance between the central cam disc axis and the rotary pivot center (C4).
5. The can coiler position adjustment mechanism as claimed in claim 1, wherein the can plate radial center (C3) and the coiler head radial center (C2) and the rotary pivot center (C4) are in a common plane.
6. The can coiler position adjustment mechanism as claimed in claim 1, wherein the cam disc is operated by a rotating means.
7. The can coiler position adjustment mechanism as claimed in claim 6, wherein the rotating means is a wrench.
8. The can coiler position adjustment mechanism as claimed in claim 6, wherein the cam disc is rotated either in clockwise or counterclockwise direction with respect to the rotary pivot center (C4).
9. The can coiler position adjustment mechanism as claimed in claim 8, wherein the wrench in clockwise direction makes the cam disc to re-center towards left to right side, the movement makes the can plate to move towards the coiler head radial center (C2).
10. The can coiler position adjustment mechanism as claimed in claim 9, wherein the wrench in counterclockwise direction makes the cam disc to re-center towards right to left side, the movement makes the can plate to move away from the coiler head radial center (C2).
11. The can coiler position adjustment mechanism as claimed in claim 1, wherein at the maximum length (e1) the distance between the coiler head and the coiler can outer circumference is minimum, whereas at the minimum length (e2) the distance between the coiler head and the coiler can outer circumference is maximum.
12. The can coiler position adjustment mechanism as claimed in claim 1, further comprises a graduated scale (S) with eccentricity values mounted on a base for identification of the measurement values.
13. The can coiler position adjustment mechanism as claimed in claim 1, further comprises a pointer (P) provided on the base plate to read the graduation markings of the scale (S).
14. The can coiler position adjustment mechanism as claimed in claim 1, is positioned at the bottom can plate region of the spinning preparatory machine.