Description:
TECHNICAL FIELD OF THE INVENTION
The present invention relates to semi-automatic doffing machine for ring spinning machine. Particularly, the present invention relates to empty cops pressing mechanism for the screw rod type semi-automatic doffing machine.

BACKGROUND OF THE INVENTION
Semi-automatic screw rod type doffing machine is used in ring spinning machine to replenish the completely wound packages called ring cops with empty cops or ring tubes in the textile spinning industry. The semi-automatic screw rod type doffing machine is made moving along the ring frame through suitable railing arrangement which is provided at bottom of the ring frame. The semi-automatic screw rod type doffing machine does two functions independently called doffing and feeding of the cops.

Doffing unit mainly consists of two screw rod mechanism for X, Y and Z direction movement to unload the fully cops from the ring spinning. These rolling elements are fixed on a moving platform which will be engaged against the completely wound cops during doffing. As the gripper forcefully engaged with fully wound cops, it starts pull during semi-automatic screw rod type doffing machine movement and lifts the tightly held cop on the spindle. The lifted cops are immediately lift by the screw rod mechanism which is controlled by the servo motor on the move and it completely takes out from the spindles. Finally, these cops were dropped into the collection basket which is kept underneath of the machine. Pulling force is available in the moving semi-automatic screw rod type doffing machine to cut the tail ends of doffed cops without using any cutters.

The delivery chute consists of a crate or box placed on the top of the semi-automatic screw rod type doffing machine to carry empty cops or ring tubes and these tubes are positioned exactly above the spindles with the help of a special feeding mechanism controlled by motor. Subsequently the cop or ring tubes are being laid on to the spindles during semi-automatic screw rod type doffing machine movement. But these empty cop or ring tubes are not pressed down to make tight fit with the spindles due to the spring ball lock is provided in the spindle. Therefore, the special effort is required to press these empty cops downward and to ensure the proper tight fit after every doffing. In addition to that the manual pressing consumes significant amount of time during total doffing time.

Thus, there is need to provide an effective mechanism where the cops will be pressed automatically instead of manual interference.

SUMMARY OF THE INVENTION
The following disclosure presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the present invention. It is not intended to identify the key/critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concept of the invention in a simplified form as a prelude to a more detailed description of the invention presented later.

The object of present invention is to overcome the above drawbacks by providing a mechanism in a semi-automatic doffing machine, by which the empty cop or bobbin is placed and pressed automatically during doffing process.

Another object of present invention is to provide a semi-automatic doffing machine with angular and linear cam actuated pressing mechanism.

It is the object of invention to press the empty cop downward so that it is placed tightly fit on taper spindle due to the spring ball lock during doffing.

It is object of the invention to reduce the doffing time and restarting of the machine time.

It is further object of the invention to provide a mechanism which is easy for maintenance and to provide an additional driving mechanism for cam actuation.

It is further object of the invention that sector-based protection system is provided by spring to safeguard the mechanism during the doffing time. When the doffing machine is running on the track, the fully load cops is removed from the spindle and the empty cop is placed in to the spindle and then the pressing mechanism presses the cop simultaneously for tight fit. In case of any fault during the cop placement in to the spindle, the spring actuation mechanism acts as to avoid the accident by slip the system and then go for the next feeding.

According to a first aspect of the present invention there is provided a semi-automated doffing machine to replenish completely wound cops or ring cops with empty ring cops over a row of tapered spindles in textile spinning machine, comprises an automated angular and linear cam actuated pressing mechanism to press the previously laid empty cops downward to make tight fit with tapered spindles of said spinning machine; wherein said automated angular and linear cam actuated pressing mechanism comprises a freely mounted linear guide way connected with a spring loaded safety protection system using a guide rod and cam arrangement; characterized in that said freely mounted linear guide way comprises a pair of freely actuated and substantially linear cops pressing plates and said cam arrangement comprises an angularly mounted cam actuating plate having an angular movement to smoothly press down said empty cops and ensures the tight fit with spindles thus reducing total doffing time and manual intervention.

Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The above and other aspects, features and advantages of the embodiments of the present disclosure will be more apparent in the following description taken in conjunction with the accompanying drawings, in which:

Figure 1 illustrates the front view of the semi-automatic doffing screw rod type doffing machine as disclosed in one of the embodiments of present invention.

Fig 2 shows the enlarge view of the angular and linear pressing assembly as disclosed in one of the embodiments of present invention.

Fig 3 illustrates the side view of angular and linear cam actuated pressing mechanism as disclosed in one of the embodiments of present invention.

Fig. 4 illustrates the front view of angular and linear cam actuated pressing mechanism when the pressing plate is in home position as disclosed in one of the embodiments of present invention.

Fig. 5 illustrates the left isometric view of angular and linear cam actuated pressing mechanism as disclosed in one of the embodiments of present invention.

Fig. 6 illustrates the right isometric view of angular and linear cam actuated pressing mechanism as disclosed in one of the embodiments of present invention.

Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may not have been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure. Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.

DETAILED DESCRIPTION OF THE PRESENT INVENTION
The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure 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 various embodiments described herein can be made without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purpose only and not for the purpose of limiting the present disclosure as defined by the appended claims and their equivalents.

It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, a reference to "a component surface" includes a reference to one or more of such surfaces.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments belong. Further, the meaning of terms or words used in the specification and the claims should not be limited to the literal or commonly employed sense but should be construed in accordance with the spirit of the disclosure to most properly describe the present disclosure.

The terminology used herein is for the purpose of describing particular various embodiments only and is not intended to be limiting of various embodiments. As used herein, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising" used herein specify the presence of stated features, integers, steps, operations, members, components, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, members, components, and/or groups thereof. Also, expressions such as "at least one of," when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.

The present disclosure will now be described more fully with reference to the accompanying drawings, in which various embodiments of the present disclosure are shown. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the various embodiments set forth herein, rather, these various embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the present disclosure. Furthermore, a detailed description of other parts will not be provided not to make the present disclosure unclear. Like reference numerals in the drawings refer to like elements throughout.

According to one embodiment of present invention there is provided a semi-automated doffing machine to replenish completely wound cops or ring cops with empty ring cops over a row of tapered spindles in textile spinning machine, comprising an automated angular and linear cam actuated pressing mechanism to press the previously laid empty cops downward to make tight fit with tapered spindles of said spinning machine; wherein said automated angular and linear cam actuated pressing mechanism comprises a freely mounted linear guide way connected with a spring loaded safety protection system using a guide rod and cam arrangement; characterized in that said freely mounted linear guide way comprises a pair of freely actuated and substantially linear cops pressing plates and said cam arrangement comprises an angularly mounted cam actuating plate having an angular movement to smoothly press down said empty cops and ensures the tight fit with spindles.

Figure 1 shows semi-automatic screw rod type doffing machine (8) is used in ring spinning machine to replenish the completely wound cops /ring tubes with empty cop or ring tubes in the textile spinning industry. The semi-automatic screw rod type doffing machine moves along the ring frame through suitable railing arrangement. The semi-automatic screw rod type doffing machine has two functions independently called doffing (wound cops) and feeding (empty cops).

Doffing unit mainly consists of three screw rod mechanism (5) and upper movement arm (3) freely fixed in different plane along as illustrated in figure 1. These elements are fixed on a moving platform which will be engaged with a gripper assembly (4). As the gripper assembly (4) with arm movement (3) forcefully pick the cops, it starts moving upward during doffing machine movement and lifts the tightly held cop on the ring frame’s spindle. The lifted wound cops are immediately taken out from the spindles and then these cops were dropped from the gripper (4) using the control of air and are collected in a box (7) which is kept underneath. In the moving semi-automatic screw rod type doffing machine to cut the tail ends of doffed cops through the under cutter which is provided at bottom of the spindle.

A delivery feeding unit consists of a crate placed on the top of the semi-automatic screw rod type doffing machine to carry ring tubes and these tubes are positioned exactly above the spindles with the help of a special feeding arrangement (2). Subsequently the cops / ring tubes are being laid on to the spindles during doffing machine movement. But these ring tubes are not pressed down to make tight fit with cops. Therefore, human effort is required to press these cops downward and to ensure the proper tight fit after every doffing. In addition to that the manual pressing consumes significant amount of time during doffing.

According to the invention an automated angular and linear cam actuated pressing mechanism (1) has been developed to press the previously laid empty cops downward to make tight fit with tapered spindles through spring ball lock. This mechanism reduces total doffing time and manual intervention. The newly developed angular and linear cam actuated pressing mechanism consists of a freely mounted linear guide way (17) connected with a spring (10) loaded safety protection system using guide rod and cam arrangement (16). As the semi-automatic screw rod type doffing machine moves, the angularly mounted feeding cam shown in figure 3, smoothly presses down the cops (2) and ensures the tight fit with spindles.

In case, either the empty cop (2) is not laid properly on the spindle or the fully wound bobbin is not taken away from the spindle, the cops will remain in raised position on the top of the spindle. This will hit the pressing plate (11) and it leads to damage the cops during doffing machine movement. In order to eliminate such accidents, the pressing plate (11,12) is fixed with a spring (10) loaded releasing mechanism using a guide plate (14) which enables the pressing plates to swing back when there is a hindrance as shown in figure 4 and 5. The spring (16) will be under compression state when the pressing plate (15) moves away from the home position. Once the semi-automatic screw rod type doffing machine moves to next spindle, the pressing plate returns to its original position due to the spring force and starts pressing the empty cops (2).

The automated angular and linear cam actuated pressing mechanism has the following advantages,
 eliminates the manual effort required to press the empty cops / ring tube to make tight fit with spindles.
 reduces significant amount of total doffing time.
 simple and easy to maintain mechanism.
 It ensures gentle and smooth pressing of cops without any damages.
 It has inbuilt protection system to safeguard the mechanism.

In view of the present disclosure, which describes the present invention, all changes, modification and variation within the meaning and range of equivalency are considered within the scope and spirit of the invention.
, Claims:
1. A semi-automated doffing machine to replenish completely wound cops or ring cops with empty ring cops over a row of tapered spindles in textile spinning machine, comprising an automated angular and linear cam actuated pressing mechanism to press the previously laid empty cops downward to make tight fit with tapered spindles of said spinning machine; wherein said automated angular and linear cam actuated pressing mechanism comprises a freely mounted linear guide way connected with a spring loaded safety protection system using a guide rod and cam arrangement; characterized in that said freely mounted linear guide way comprises a pair of freely actuated and substantially linear cops pressing plates and said cam arrangement comprises an angularly mounted cam actuating plate having an angular movement to smoothly press down said empty cops and ensures the tight fit with spindles.

2. The doffing machine as claimed in claim 1, wherein the pressing plates (11,12) is fixed with the spring (10) loaded safety protection system using a guide plate (14) which enables the pressing plates to swing back when there is a hindrance.

3. The doffing machine as claimed in claim 1, comprises three screw rod mechanism freely fixed in three different planes along with a gripper assembly; wherein these grippers are fixed on a moving arm which will be engaged against the completely wound cops during doffing.

4. The doffing machine as claimed in claim 1, comprises a delivery feeding unit consisting of a crate placed on the top of the semi-automatic screw rod type doffing machine to carry empty cops and these cops/tubes are positioned exactly above the spindles with the help of a mechanical feeding.