NON-ROTATING BOBBIN HOLDER Technical Field
The present invention relates to a non-rotating and rocking bobbin holder for flexible loading and unloading of bobbins in textile spinning machinery. Background and Prior art
Bobbin Holder is a device, which helps the roving bobbin to unwind smoothly at a speed corresponding to the feed rate of the roving into the ring spinning frame. Basically bobbin holders are used in yam spinning mills. It is a principal functional part indispensable for roving and spinning processes. It is capable of securing and releasing bobbins easily. The construction of a Bobbin Holder is such that the bobbin is held by the Bobbin Holder when it is simply thrust up onto the Bobbin Holder, thus applying it thereto, or that the bobbin may be released when thrust up once more, thus to be removed there from.
The second function is to rotate smoothly and uniformly for feeding the roving. The Bobbin Holder has a thrust bearing with bearing balls to facilitate this function. The bearing is assembled inside the Bobbin Holder in such a way that the force applied on loading and unloading the bobbins is not felt by it.
Therefore a bobbin holder generally comprises a head, which houses a bearing and a brake system and a lower portion, the stem, which houses the retainer device for the bobbin tube. The retainer device has two levers that hold on to the bobbins once they are fixed and prevent them from falling. When the bobbin is pushed into the holder, the levers are shrunk inside the holder to allow passage of the bobbin into the stem of the holder. Once the bobbin passes the lever side then immediately the levers jut out and prevent the bobbin from slipping out of the holder.
After the roving is exhausted in the bobbin, an operator has to take it out and mount a nev/ full bobbin. As one operator is required to supervise many machines in modem times, it is difficult for the operator to reload the bobbins immediately after they are due. Since the bobbins are not stored near the machine, time is lost in fetching a new bobbin for changing it. Sometimes this delay causes loss of production. Recently, in order to minimize the time for loading bobbins, the machinery manufacturers have started offering another row of creel to accommodate spare bobbin holders, also called as non-

rotating bobbin holders on which will be mounted the bobbins-in-waiting. The bobbins will be shifted to the regular rotating bobbin holders when it is time to change them. As these spare bobbin holders need not feed the roving to the machine, they do not have the rotating feature in them.
As these spare bobbin holders are strictly to hold the waiting bobbins, they must not rotate lest the free end of the roving yam in the bobbin may come off the pool loosely and get entangled with the roving from the working bobbins thus causing serious yam quality as well as breakage problems. Accordingly, there is a need for bobbin holders that are non-rotating.
Non-rotating bobbin holders
The non-rotating bobbin holders are employed for transport system, loading and unloading of bobbins. These non-rotating bobbin holders are placed on the frame adjacent to rotating ones, such that adjacent to every four rotating bobbin holders there is a non-rotating one. The non-rotating bobbin holder has a spare bobbin on it at all times. The main function of the non-rotating holder is to save time during replacement of the bobbins when the yam gets exhausted.
Traditionally non-rotating bobbin holders that are manufactured are usually non-flexible. The disadvantage of such non-flexible holders is that when the bobbins are loaded on them from an angle, then the stem of the bobbin holder breaks due to excess strain in an angular direction. A non-rotating holder does not contain the bearing mechanism and the brake, as it is not used for rotation. Hence, they are normally made rigid and without the 'rocking' feature of the rotating bobbin holders. Due to absence of rocking feature, when the bobbins are loaded at an angle, with higher impact loads the stem of the bobbin holder breaks at its neck. The bobbins are not always loaded axially but at an angle of varying degree, which causes bending load forces on the stem during the loading and unloading of bobbins. A non-rotating holder does not contain the bearing and the brake, as it is not used for rotation. Hence they are normally made rigid and without the 'rocking' feature of the rotating bobbin holders. Due to absence of rocking feature, when the bobbins are loaded at an angle, with high impact loads the stem of the bobbin holder breaks at its neck. The bobbins are not always loaded axially but at an angle, which causes bending load on the spindle. This angle can be up to 7 degrees, since there is

clearance between the inner diameter of the bobbin tube and the outer diameter of the mating part in the bobbin holder. This impact load at an angle introduces a transverse component of this force on the stem of the bobbin holder. This transverse force introduces a bending moment on the end of the bobbin holder causing it to break at the weakest part, which is the neck on the stem. Objects of the invention
The primary object of the present invention is to provide a non-rotating and rocking bobbin holder with a stem having a degree of angular movement.
An object of the present invention is to provide a non-rotating and rocking bobbin with a cubicle having a suitable floor profile disposed in a hollow cylindrical member. Another object of the present invention is to provide a non-rotating and rocking bobbin holder with a stud member having head, neck and body with variable surface profile functionally disposed in the cubicle.
Yet another object of the present invention is to provide a non-rotating and rocking bobbin holder with a rocking stem fitted to the cylindrical member. Summary of the invention
The present invention provides a non-rotating and rocking bobbin holder comprising a hollow cylindrical member enclosed in a cup of said bobbin holder having an opening on the lower side and an upper covered side with a pass-through passage, a cubicle with a suitable floor profile disposed on the inner surface of the upper side of said cylindrical member with a pass-through passage, a stud member with a head having a profile corresponding to the inner profile of the cubicle, a neck with a smooth surface and a body with a threaded profile, said stud member is permitted through the pass-through passage of said cubicle with its head resting on the floor of the cubicle and the neck functionally supported by the pass-through passage and the threaded body extending from the pass-through passage for fitment with frame of textile machine, said cylindrical member is fitted to the cup through the stud member by means of inner and outer fasteners, said inner fastener disposed to terminate near the neck, to provide an intervening gap between the upper surface of the cylindrical member and the lower surface of the inner fastener, and a rocking stem is functionally connected to the cylindrical member, said stem

disposed to provide a degree of angular movement during the mounting and dismounting
of the bobbin member on to the stem.
Brief description of the accompanied diagrams
Fig 1 depicts a longitudinal cross-sectional assembly of the non-rotating bobbin holder of the present invention
Fig 2 depicts a partially cut, exploded view of the upper portion of the non-rotating bobbin holder of the present invention.
Fig 3 is a cross section of the upper portion of the non-rotating bobbin holder of the present invention.
Fig 4 is a cross section view of the cylindrical member of the non-rotating bobbin holder with a cubicle to accommodate the head of the stud member
Fig 5 depicts a cross sectional views of the bobbin holder of the present invention displaying the degree of angular tilt (rocking) of the stem.
Fig 6 depicts the rocking motion of the non-rotating bobbin holder of the present invention to absorb the forces during the loading or unloading of bobbins. Detailed description of the invention
Accordingly, the present invention provides a non-rotating and rocking bobbin holder, for use in ring spinning textile machine as a spare bobbin holder, to hold the waiting bobbins. The embodiments of the present invention are explained by referring to the accompanied diagrams. Fig 1, which depicts a longitudinal cross-sectional view of the complete non-rotating and rocking bobbin holder assembly, which comprises a stud member (1) with a head, a hollow cylindrical member (7), a plurality of fasteners (4,5 & 6), a cup (8), a rocking stem (14), an engaging-releasing clutch means (10 & 12), weight (17), and a pair of engaging fingers (16).
The cup (8), which is in an inverted form, has a top tapering profile and a lower skirt profile. A pass-through cup passage is provided on upper surface of the cup (8). The hollow cylindrical member (7) is provided with an opening on the lower side and a covering on the upper side. The covering on the upper side of the cylindrical member (7) is provided with a cylinder member pass-through passage. A cubicle (7a) with a floor profile, which is preferably curvaceous, is disposed on the inner surface of the upper side of said cylindrical member. The cubicle (7a) is placed around the cylindrical member

pass-through passage as provided on the upper surface of the cylindrical member (7). A stud member (1) is provided with a head having a profile corresponding to the inner profile of the cubicle member (7a). The stud member (1) is provided with a neck having a smooth profile extending from the head. The stud member (1) extends further into an elongated body having a threaded profile.
The stud member (1) is allowed to pass through the pass-through passage of the cylindrical member (7) such that the head of the stud member (1) rests on the floor of the cubicle (7a) of the cylindrical member (7). The neck of the stud member (1) is functionally supported by the pass-through passage of the cylindrical member (7). The threaded body of the stud member (1) extends from the pass-through passage of the cylindrical member (7) for fitment with creel of the spinning machine. (Not shown in this Figure). The cylindrical member (7) is fitted to the cup (8) through the stud (1) by means of plurality of fasteners. The cup (8) is held to the stud member (1) between two fasteners, arranged such that the lower fastener (6) is just below the cup (8) to support the cup (8) from below and the upper fastener (5) is just above the cup. The cup (8) is sandwiched and tightly held between these two fasteners. Above the upper fastener (5) of the cup (8) an addifional fastener (4) with a washer (3) is disposed to hold the bobbin holder assembly to the creel of the spinning machine in textile machinery. A rocking stem (14) is functionally connected to the cylindrical member (7) in the following manner. The stem (14) constitutes the lower potion of the bobbin holder and provides a degree of angular movement during loading and unloading of the bobbins. This stem (14) consists of a hollow cylindrical stem, which houses two clutches (top and bottom clutches) that engage and disengage when the bobbin is loaded and unloaded. The top clutch (10) is secured to the stem member (14) by means of a steel pin (9). This steel pin (9) also helps to connect this stem as a whole to the cylindrical member (7). Attached to the bottom clutch (12) is an actuator (13), which is pushed up and down the stem member (14) by a conical weight member (17) to enable the clutches (10 & 12) to engage and disengage. At the other end of the actuator (13) are two fingers (16), which are pivoted to the actuator (13) by an aluminum pin (15). This connection enables the fingers (16) to swing out and swing in when the bobbins are to be loaded and unloaded respectively.

Now, referring to Figs 2 and 3, wherein Fig 2 depicts the arrangement of partially cut, exploded view of the upper portion of the non-rotating bobbin holder of the present invention and Fig 3 depicts the cross section of the upper portion of said non-rotating bobbin holder. In an embodiment of the present invention the assembly and the functional relationship of the stud member (1) with other components including the cylindrical member (7) and the cup (8) is explained by referring to Figs 2 & 3. The stud member (1), which is an elongated bolt-like structure, is passed through the pass-through passage of the cylindrical member (7) with its head (la) movably positioned on the floor of the cubicle (7a). The dimensional configuration of the head (la) of the stud member is preferably a square shape. However, it is within the scope of the invention to use other suitable dimensional configurations like star shape, diamond shape, oval shape, a circular shape with two flats etc for the head (la) to achieve the same functional objective of the head (la) as disclosed in this invention. The surface profile of the both the inner and outer surfaces (lb) of the head (la) of the stud member (1) is curvaceous. However, the surface profile of the head (la) can also be suitably modified, (for instance, surface profile, which is convex in shape) to achieve the desired objective as hereinafter provided.
In order to enable functional accommodation of the head (la) inside the cubicle (7a), the surface configuration of the floor of the cubicle (7a) is made curvaceous. The fimctional accommodation of the head (la) inside the cubicle (7a), is performed by providing a matching surfacial configuration of floor of the cubicle (7a). A plurality of comer supporting members (7b) is disposed on the floor of the cubicle (7a) to support the curvaceous profile of the head (la) of the stud member (1).
In another embodiment of the present invention a cross sectional view of the cylindrical member (7) (Fig 4) of the non-rotating bobbin holder having a cubicle (7a) that accommodates the head (la) of the stud member (1) is disclosed. The shape of the cubicle (7a) of the cylindrical member (7) corresponds to the dimensional shape and configuration of the head (la) of the stud member (1), which is functionally disposed inside the cubicle (7a). The cubicle (7a) is provided with sidewalls (7d) to provide support to the head (la) during operation. A plurality of comer supporting members (7b) is provided inside the cubicle (7a) to support the head (la) of the stud member (1). The

cub1cle (7a) 1s further prov1ded w1th a pass-through passage, wh1ch matches w1th the pass-through passage of the cyl1ndr1cal member (7).
By referr1ng aga1n to F1gs 2 & 3, the stud member (1), wh1ch 1s an elongated bolt-l1ke member hav1ng a neck (1c) extend1ng from the head (la). The cyl1ndr1cal neck (1c) of the stud member (1) 1s prov1ded w1th a smooth surface prof1le. The neck (1c) 1s further extended 1n the form of a threaded body (1d). The head (la) of the stud member (1) 1s d1sposed to movably rest on the floor of the hous1ng of the cub1cle (7a). The neck (1c) of the stud member (1) passes through the pass-through passage of the cyl1ndr1cal member located at the center of the cub1cle, such that the neck (1c) of the stud member (1) 1s funct1onally supported by the pass-through passage. The threaded body (1d) of the stud member (1) 1s passed through the pass-through passage of the cyl1ndr1cal member (7) and the cub1cle such that the ent1re threaded prof1le of the stud member (1) projects out of the cyl1ndr1cal member (7) w1th the neck (1d) movably abutt1ng the pass-through passage of the cyl1ndr1cal member (7). The threaded body (1d) of the stud member (1) 1s prov1ded w1th a plural1ty of fasteners. The cyl1ndr1cal member 1s f1tted to the cup (8) of Bobb1n holder by us1ng the support of the stud member (1) and by means of the fasteners. The 1nner fastener (6) d1sposed 1ns1de the cap (8) 1s fastened on the stud member (1) to allow 1t to term1nate near the neck (1c) of the stud member (1) to prov1de an abutt1ng support to the 1nner surface of the cap (8) on one s1de and to prov1de an 1nterven1ng gap between the upper surface of the cyl1ndr1cal member (7) and the lower surface of the 1nner fastener. Outer fasteners (5 & 4) of the stud member (1) are prov1ded to abut the upper surface of the cap (8) w1th the 1nner fastener and the cap (8). The threaded prof1le (1d) of the stud member (1) 1s further extended and f1tted to the frame of the text1le mach1ne by means of an add1t1onal fastener (4) and a washer (3).
Th1s ser1es of arrangement results 1n an assembly of the stud member (1), cyl1ndr1cal member (7) and a cup (8), wh1ch are funct1onally connected to each other to form an upper reg1on of the Bobb1n Holder and further to prov1de a rock1ng funct1on to the stud member (1) dur1ng operat1on of the bobb1n holder.
1n another embod1ment of the present 1nvent1on, the object1ve of the prov1d1ng a rock1ng bobb1n holder 1s ach1eved by prov1d1ng an assembly of the Bobb1n holder as prov1ded above. Another aspect of the present 1nvent1on 1s not only to prov1de a bobb1n holder w1th

rock1ng flex1b1l1ty dur1ng the load1ng and unload1ng of the bobb1n but also to preserve and ma1nta1n the ma1n funct1onal1ty of the bobb1n holder 1.e. to keep the bobb1n holder a non-rotat1ng one. Th1s object1ve 1s ach1eved by way of prov1d1ng a su1table prof1le for the head (la) of the stud member (1). 1n the present 1nvent1on, a square head prof1le 1s adopted to 1mpart the des1red rock1ng and non-rotat1ng features of the bobb1n holder. However, 1t 1s w1th1n the purv1ew of the present 1nvent1on to use other su1table prof1les. The non-rotat1ng bobb1n holder of the present 1nvent1on compr1ses a cyl1ndr1cal member (7), as shown 1n F1g 5. The cyl1ndr1cal member (7) of the present 1nvent1on 1s open on one end and closed on the other end. The end that 1s closed 1s prov1ded w1th a small passage at the center. The end hav1ng the smaller passage 1s prov1ded w1th a cub1cle (7a) on the 1nner surface. The d1mens1ons of th1s cub1cle (7a) correspond to the d1mens1ons of the square head (la) of the threaded stud member (1) (wh1ch 1s shown 1n F1g 4), such that the square head (la) can be accommodated to rest w1th1n the cub1cle (7a) 1n the 1nner surface of the cyl1ndr1cal member (7).
1n another aspect of the present 1nvent1on, the rock1ng features of the bobb1n holder of the present 1nvent1on are expla1ned by referr1ng to F1g 5 & 6 of the accompan1ed d1agrams. When the non-rotat1ng bobb1n holder of the present 1nvent1on 1s employed, the cyl1ndr1cal member (7) 1s allowed to t1lt 1n all d1rect1ons by vary1ng degrees.
The rock1ng feature of the non-rotat1ng bobb1n holder 1s enabled by suspend1ng the stem member (14) w1th1n the cyl1ndr1cal member (7). The stem member (14) may be suspended from the cyl1ndr1cal member (7) by employ1ng any known means of suspens1on such as suspens1on w1th help of a p1n, etc. S1nce, the cyl1ndr1cal member (7) and the stem member (14) of the bobb1n holder are funct1onally connected to the stud member (1), the load1ng and unload1ng of the bobb1ns on to the stem (14) results 1n the rock1ng of the stem (14).
1n another aspect of the present 1nvent1on, the stem (14) port1on of the bobb1n holder 1s strengthened by prov1d1ng smooth surface prof1le on the neck (1c) of the stud member (1) to el1m1nate stress concentrat1ons 1n the comers of the neck (1c) of the stud member (1). The neck (1c) 1s des1gned 1n such a way that there 1s no stress concentrat1on at the comers and thereby prov1des max1mum strength for the neck (1c) aga1nst bend1ng. 1n add1t1on to strengthen1ng the stem, add1t1onal "rock1ng" or flex1b1l1ty feature was 1ntroduced to

ensure that the stem does not break at the 1mpact load of the bobb1n wh1le load1ng 1t even at an angle. Th1s mod1f1cat1on enables t1lt on the ax1s by 13°, very well accommodat1ng the poss1ble angular load1ng of up to 7 degrees. Therefore th1s completely el1m1nates any 1mpact force be1ng appl1ed on the stem. Crash Test
1n order to test the r1g1d1ty of the stem member (14) and the flex1b1l1ty of the bobb1n holder of the present 1nvent1on, a crash test was carr1ed out to measure the strength of the mod1f1ed holder. The convent1onal non-rotat1ng bobb1n holder 1s held vert1cally 1ns1de a conta1ner and a f1ve-k1lo we1ght 1s dropped on the head of the holder from d1fferent he1ghts. The he1ght at wh1ch the stem breaks 1s noted. The same test 1s repeated us1ng the non-rotat1ng bobb1n holder of the present 1nvent1on. 1t was observed that the w1thstand1ng capac1ty of the bobb1n holder 1s enhanced.
1n the stem of the convent1onal bobb1n holder break1ng was observed at the neck port1on when the we1ght was dropped from a he1ght of 9.5 cm. 1n the stem of the bobb1n holder of the present 1nvent1on the breakage was observed only when the we1ght was dropped from 20cm, thus 1ncreas1ng the strength by 100%. Advantages
1. The present 1nvent1on, by prov1d1ng a t1lt1ng and flex1ble stem enables easy load1ng and unload1ng of the bobb1ns, thus 1ncreas1ng the product1v1ty 1n the text1le m1ll.
2. The present 1nvent1on prov1des a bobb1n holder that 1s both non-rotat1ng and rock1ng.

We claim:
1. A non-rotating and flexible bobbin holder, said bobbin holder comprising; a hollow
cylindrical member functionally enclosed in a cup of said bobbin holder having an
opening on the lower side and an upper covered side with a pass-through passage, a
cubicle with a suitable floor profile disposed on the inner surface of the upper side of
said cylindrical member with a pass-through passage, a stud member with a head
having a suitable profile corresponding to the inner profile of the cubicle, a neck
extending from the head with smooth surface and a body extending from the neck
with a threaded profile, said stud member is permitted through the pass-through
passage of said cubicle with its head resting on the floor of the cubicle and the neck
functionally supported by the pass-through passage and the threaded body extending
from the pass-through passage for fitment with frame of textile machine, said
cylindrical member is fitted to the cup through the stud member by means of inner
and outer fasteners, said inner fastener disposed to terminate near the neck, to provide
an intervening gap between the upper surface of the cylindrical member and the
lower surface of the inner fastener, and a rocking stem is functionally connected to
the cylindrical member, said stem disposed to provide a degree of angular movement
during the mounting and dismounting of the bobbin member on to the stem.
2. The bobbin holder as claimed in claim 1, wherein the configuration of the floor of the
cubicle is curvaceous.
3. The bobbin holder as claimed in claim 1, wherein the cubicle is provided with comer
supporting members to support the head of the stud member.
4. The bobbin holder as claimed in claim 1, wherein the configuration of the head is
non-circular, a square, star-shaped, oval or a circular with two flat sides, preferably a
square.
5. The bobbin holder as claimed in claim 1, wherein the surface profile of both inner and
outer surfaces of the head of the stud member is curvaceous.