JP2007534852A - Rotating bobbin holder - Google Patents

Abstract

The rotating bobbin holder includes a stud member 25 having a head 25a and a body 25c having a variable length and having a substantially non-circular cross section. The body further extends as a screw-shaped portion 25d. It arrange | positions so that a small hole may be penetrated. The rotating bobbin holder includes a brake shoe 17 that can be inserted through the stud member and is disposed on the outer upper surface of the barrel in order to apply a variable braking force by the brake tensioner 19. One side of the tensioner is connected to the brake shoe, and the other side is in contact with the tensioner support member 20, and the skirt member 18 is inserted on the stud member and disposed on the upper wide barrel. In order to support the skirt member in a non-rotatable manner, there is a shape portion provided on the skirt member corresponding to the outer shape of the tensioner support member. A spacer member 26 is disposed in the main body of the stud member for compression / release of the tensioner.
[Selection] Figure 1

Description

  The present invention belongs to the field of bobbin holders. The present invention relates to a rotating bobbin holder capable of changing a braking force.

Background and related technologies

  The bobbin holder is an important functional component indispensable in the roving and spinning processes in a spinning mill. It is a hanging type rotary bobbin holder. In this type of rotary bobbin holder, a standard bobbin for yarn, sliver or roving can be released so that it can be freely rotated from a creel rail (pipe spool) of a spinning machine etc. Suspended by.

  A conventional bobbin holder mainly used in a spinning machine has two main functions. The first function is that the roving bobbin can be fixed and released without difficulty. For this purpose, an automatic fixing / releasing mechanism is provided in the barrel body of the bobbin holder. When the barrel body is inserted into a bobbin support hole provided in the upper part of the bobbin, the bobbin support hole and its depth are formed by a medium composed of two or more fingers or levers protruding in a plurality of directions from the lower part of the barrel body. The bobbin is supported by a shoulder portion located between the large-diameter hollow portion extending at.

  The second main function of the bobbin holder is a function of rotating the suspended bobbin holder smoothly and uniformly. For this purpose, almost all bobbin holders use rolling contact ball bearings that are hung on the creel rails of the spinning machine. In the holder spinning frame, a maximum of 1200 bobbin holders are required to hang down from the creel rail. It is therefore essential to make these bobbins as light and inexpensive as possible. Therefore, metal is used only for the ball of the ball bearing portion, and the remaining portion is formed of a synthetic resin material having good wear resistance. This rolling bearing structure arranged in the axial direction of the bobbin holder, in cooperation with the bearing itself, has a substantially zero rotational resistance value, thereby ensuring a smooth and uniform rotation.

  In operation, the rotating bobbin holder is not only free to rotate indefinitely but also needs to be given controlled and limited rotation. The rotational speed of the bobbin holder must match the speed at which roving is fed into the spinning machine. In order to obtain the best yarn quality parameters, it is necessary to maintain a uniform roving tension.

Controlled rotation is achieved by providing a braking system in which the brake shoe is pressed against the rotating part of the bobbin holder by a coil spring. Therefore, if the pressing force by the coil spring is not changed, the braking torque (T _b ) on the bearing side is substantially constant.

When the bobbin holder is operating, the braking torque (T _b ) on the bearing side is the rotational torque (T _r ) on the roving bobbin side caused by the roving drawing pulling tension F exerted on the rotating part when the roving is drawn. Maintain a value close to. If this value is not maintained, the roving may be unnecessarily unwound and the roving may be loosened due to free rotation, or the yarn may be cut at multiple points, or it may be taut The roving is stretched and / or snapped.

The spring is selected such that when it is compressed to a predetermined distance (d), its stiffness (k) exerts the required compression force (C), which together with the coefficient of friction (μ) is a rotational torque. A braking torque (T _b ) that maintains an equilibrium with (T _r ) is generated.

  In practice, there are several qualities of yarn used in various fiber applications. Each of these types of yarns causes various sizes of roving tension.

The setting of the roving spinning tension is based on many factors such as the quality of the raw materials used, the spindle speed, the torsion factor in the roving and spinning, the spinning number, the age, and the type of spinning frame. The roving tension varies from 2 grams to 8 grams depending on the application, and therefore the bobbin holder needs to be given many different braking forces / torques. Therefore, different sets of bobbin holders with different braking springs are currently used to suit various applications. In general, three different brake systems are used. That is, the first is for the coarse count yarn, the second is for the intermediate count, and the third is for the fine count yarn. However, in many cases, the yarn count is not the only parameter for determining the change of a specific bobbin holder. Depending on other parameters such as speed, torsion factor, raw material quality, and many other changing conditions, the user uses different bobbin holders to achieve a variable braking force. It is also common to use different spring systems to customize the brake system in various applications. These are usually distinguished by the color code specified for the skirt member. For example, if the user desires to change the count due to market demand, the entire bobbin holder must be changed. Alternatively, it is necessary to change the brake spring by opening the bobbin holder, which may significantly change the original settings of the bobbin holder manufacturer. In addition, these changes may affect production in the textile factory. The need for universal bobbin holders that can adjust the braking torque (T _b ) under various spinning conditions where the rotational torque is significantly changed is a need that has been felt for many years in the spinning industry. .

  In the known bobbin holder, the compression length of the spring that gives the braking torque is constant. This is because both ends of the spring are fixed. That is, one end of the spring is placed on the brake shoe, and the other end of the spring is placed on the inner surface of the skirt or cap.

  Attempts were made to develop an adjustable brake bobbin holder. This is described in patent EP0547712. This version uses two slidable cylindrical members. In this case, the other cylindrical member is provided within one cylindrical member, both of which are mounted on a stud member that rotatably supports one of the known bobbin lock finger systems. . The outer cylindrical member includes a spiral protrusion on the inner peripheral surface thereof and a lower end of a spiral-shaped portion or a step-shaped portion provided with a uniformly spaced notch. The inner cylindrical member has a spiral groove on the upper peripheral surface and a circular rim on the lower end, and the upper end has a spiral-shaped portion or a step-shaped portion provided with teeth adapted to the notch. ing. By rotating the cylindrical members relative to each other, the inner cylindrical member is moved downward or upward along the axial direction with respect to the outer cylindrical member due to contact between the spiral shaped portions. The downward movement of the inner cylindrical member compresses the helical spring, thereby increasing sexual power. In order to support the inner cylindrical member from the lower side and always keep it in contact with the upper inner surface of the outer cylindrical member, another spring is coaxially provided inside the brake spring.

  However, in this embodiment of the adjustable braking force system, the settings are not clearly visible. Of course, the position is marked by embossed characters on the surface of one cylindrical member, but cannot be seen from a distance. This means that if there is a different setting on different bobbin holders, it will be detected immediately and not corrected.

Object of the invention

  A main object of the present invention is to provide a rotating bobbin holder that can change a braking force and can clearly recognize the setting.

  An object of the present invention is to provide a rotating bobbin holder that can change a braking force by using a single torque spring.

  Another object of the present invention is to provide a rotating bobbin holder that can vary the braking force by using a removable spacer and a non-removable spacer to generate the desired braking force.

Summary of the Invention

  Accordingly, the present invention comprises a bobbin suspension tube having an upper wide barrel and a lower narrow trunk, the trunk having a pair of bobbin holding fingers for holding and releasing the bobbin, and a ring spinning machine A rotating bobbin holder connected to the head, and comprising a stud member having a curved surface for receiving a bearing assembly and a smooth neck extending from the head and terminating at a substantially barrel-shaped bulge. The stud member has a body portion that can vary in length and extends from the neck and has a substantially non-circular cross section, the body portion further extending as a screw-shaped portion, and the stud member is formed on the upper surface of the wide barrel. The head, which is placed through the eyelet and has a bearing assembly, rotates against the bobbin suspension tube. A brake shoe having a central opening that is rotatably abutted against the upper inner surface of the barrel and through which the stud member can be inserted to provide movement, the brake shoe being adapted to provide a variable braking force by a brake tensioner; Arranged on the outer upper surface of the barrel, the tensioner is functionally connected on one side to the upper surface of the brake shoe, and on the other side of the tensioner is a tensioner support member having a shape corresponding to the body of the stud member. The skirt member has a small-diameter skirt member that abuts and has a small hole having a corresponding shape of the main body of the stud member on its upper surface and an open lower end portion, and the skirt member can be inserted through the stud member. In addition, it is arranged to surround the upper wide barrel and functionally supports the skirt member in a non-rotatable manner In order to compress and release the tensioner, a relative surface shape portion provided on the inner surface of the upper end of the skirt member and corresponding to the outer shape of the tensioner support member is provided. A rotating bobbin holder having a desired thickness and having at least one spacer member with a locking means disposed on the body of the stud member and provided on the upper surface of the skirt member to generate a desired variable braking force provide.

Detailed description of the invention

  Therefore, the present invention provides a bobbin holder that can change the braking force in order to exert a variable braking force corresponding to a spinning state such as a count. Hereinafter, representative embodiments of the present invention will be described with reference to the accompanying drawings.

  Referring to FIG. 1, the bobbin holder of the present invention in a sectional view has an upper wide barrel 11 and a rotatable narrow trunk 8. The narrow trunk 8 is connected to and suspended from the upper wide barrel 11 in a known manner by rivet means 13 and forms a single rotatable unit with the wide barrel 11. A weight collar 3 is floating on the trunk. The trunk 8 accommodates an actuator 9, and two bow-shaped fingers 1 are connected to the lower end of the actuator by an actuator pin 4 so as to be rotatable with respect to the actuator. A ratchet 6 is accommodated in the upper portion of the actuator 9. The ratchet also has two wings on its body connected to the actuator 9 by a ratchet pin 7. The 'Z' type flat spring 5 has one leg portion positioned in the groove of the actuator 9 and the other end portion placed on the ratchet 6. Fulfills the function. An actuator spring 10 is positioned at the upper end of the actuator 9. The upper end of the actuator spring 10 is in contact with the upper end cap 12, and the upper end cap 12 is fixed to the upper end of the trunk via a rivet 13.

  When the weight collar is pushed up once during the operation of the bobbin holder, the flat spring 5 rotates the ratchet 6 by 90 degrees. At this time, the two wings of the main body of the ratchet 6 take a horizontal position and are thus placed on the shoulder of the trunk 8. In this position, the bobbin holding finger contracts to release the bobbin.

  When the weight collar 3 is pushed up by the bobbin for the second time by the bobbin, the operating lug of the flat spring 5 rotates the ratchet 6 again by 90 degrees, so that the wings of the ratchet 6 take the vertical position, so that the actuator 9 It can detach | leave from the shoulder part of 8 and can fall further below. At this time, the finger 1 is swung away with the help of the dowel pin 2, thereby holding the bobbin in place.

  Here, with particular reference to FIGS. 1, 2, and 4, in one embodiment of the present invention, a stud member 25 having a head 25 a having curved surfaces on both sides is mounted with a rotatable upper wide barrel 11. It is used as a non-rotatable pivot shaft. The upper wide barrel is rotated by a bearing race 14 on which a ball 15 is rotatably arranged. The neck portion 25b of the stud member 25 has a smooth outer periphery as a whole, extends from the head 25a, and terminates at a substantially barrel-shaped bulging portion 25e. The barrel-shaped bulging portion 25 e acts as a bottom dead center in the operation of the tensioner (tensile member) 19. The tension member 19 will be described later. A main body portion (formed from 25c and 25f) of the stud member 25 extends from the bulging portion 25e. The main body portion can be changed in length and has a substantially non-circular cross section. . The length of the main body can be changed according to the length of the brake tensioner 19 and the tensile strength. The changeable length of the main body portion of the stud member 25 is proportional to the unrestricted length of the tensioner 19. In the present invention, as an exemplary embodiment, the cross-sectional shape of the main body portion 25c of the stud member 25 is, for example, an ellipse, a square, a star, a cross, a hexagon, or a diamond shape as shown in FIG. , A polygon, or a shape such as a substantially circular body having a wing-shaped portion around it. These cross-sectional shapes allow the skirt member to move linearly with the tensioner support member 20 during operation and prevent the skirt member 18 from rotating. However, in the present invention, it goes without saying that any other appropriate cross-sectional shape that can prevent the rotational movement of the skirt member 18 can be adapted to the main body portion 25c. In the present invention, the cross-sectional shape used is a substantially circular body 25f having a wing-shaped portion 25c around as shown in FIG. The cross-sectional shape of the stud member 25 as described above is further extended vertically by the screw-shaped portion 25d. The thread-shaped region 25d of the stud member is used to suspend the bobbin holder from a ring spinning machine or a rail (not shown) of a similar textile machine by the intermediate mounting devices 22-24. A stud member 25 having a bearing race 14 mounted on its head is functionally arranged to pass through a small hole in the wide barrel. In this case, the bearing race 14, the bearing ball 15, and the cage 16 abut against the upper inner shape of the wide barrel in a known manner so as to impart a slight swinging motion and rotation to the barrel 11 and the trunk 8.

  In another embodiment of the present invention, a brake shoe 17 having a diametrically opposite shape corresponding to the upper surface of the upper wide barrel 11 having a central opening is rotatably arranged to allow the stud member 25 to pass through the central opening. Thus, a variable braking force can be applied using the brake tensioner 19 operably connected to the brake shoe 17 during operation of the bobbin holder.

  One side of the brake tensioner 19 is operatively connected to the upper surface of the brake shoe 17, and a tensioner support member 20 having a shape corresponding to the body of the stud member 25 is in contact with the other side of the tensioner. Yes. As can be seen, the tensioner support member 20 that contacts the tensioner 19 is placed on the upper surface of the tensioner 19. In the present invention, the tensioner support member 20 is in the form of a hexagonal washer. However, any other suitable shape can be applied to the tensioner support member 20. The tensioner 19 of the present invention is a tension device for applying a compression force and a force for releasing the compression to the brake shoe 17 during operation. In the present invention, a tension device in the form of a metal spring, rubberized spring or rubber sleeve functions as the tensioner 19. However, the metal objects disclosed as tensioning devices are exemplary and should not be construed to limit the scope of such devices. It is also possible to use variations of such devices, including but not limited to hydraulically controlled metal devices, pneumatically controlled metal devices, or thermally controlled metal devices. Within range. In the present invention, as an exemplary embodiment, a metal spring is used as the tensioner 19 to generate a variable braking force.

  Here, referring specifically to FIG. 2 or FIG. 3, the arrangement of the tensioner 19 is shown. The tensioner 19 in the form of a metal spring is disposed around the body portion of the stud member 25 using an end support in the form of the brake shoe 17 and the tensioner support member 20. The tensioner 19 is disposed so as to cover a region between the upper surface of the brake shoe 17 and the start portion of the screw-shaped portion 25d of the stud member 25.

  The diameter-enlarged skirt member 18 has a small hole having a corresponding shape of the main body of the stud member 25 on its upper surface and an open lower end portion. In addition, the skirt member 18 can be inserted through the stud member 25 and is disposed so as to surround the upper wide barrel 11. The basic function of the skirt member 18 that prevents the fluff from entering the bearing assembly is reliably maintained while the diameter-enlarged skirt member 18 corresponding to the variable length of the main body portion 25c of the stud member 25 is provided. It is.

  In the present invention, as an exemplary embodiment as given in FIG. 6, two grooves 18 a are arranged at opposite ends so as not to rotate with respect to the main body portion 25 c of the skirt member 18 and the stud member 25. It has a small hole. The hexagonal threaded washer 21 is screwed into the threaded portion of the stud member 25 and defines the top dead center for the linear motion of the skirt member 18.

  An appropriate shape portion 18b corresponding to the shape of the tensioner support member 20 is provided on the upper inner surface of the skirt member 18 in order to obtain a connection in which relative rotation between the stud member and the skirt member is impossible. .

  In another embodiment of the present invention, at least one spacer member (26, 27, 28, 29) is disposed in the region of the body portion of the stud member 25 in order to generate a desired braking force. The size, type, shape and number of spacer members (26, 27, 28, 29) are determined taking into account the count and the desired amount of braking force required during spinning of the yarn. The selected spacer member (26, 27, 28, 29) compresses the tensioner 19 and releases the compression, and provides a desired variable braking force by the brake shoe 17 of the bobbin suspension tube during operation. In order to generate, it is arranged on the main body of the stud member 25 and provided on the upper surface of the skirt member 18. In yet another embodiment of the present invention, the spacer member is a variable size removable spacer that corresponds to the braking and rotational torque of the corresponding yarn count.

  In a further embodiment of the invention, the locking means for securing the removable spacer member to the body of the stud member uses snap fit or press fit as the locking means.

  In another embodiment of the present invention, a non-removable spacer member in the form of a variable sized solid spacer (non-interrupted spacer) corresponding to the braking and rotational torque is also used. Here, the inner surface shape of the non-removable spacer member is a threaded shape or a screwless shape according to the surface shape of the stud member as adapted in the present invention.

  In another embodiment of the present invention, referring to FIG. 5, a C-shaped spacer member with two extensions each having a hole is positioned on the stud member 25 above the skirt member 18. In order to fix, it arrange | positions on the stud member 25 by the dwell pin inserted in the designated hole, and is fixed. The dowel pin serves as an additional or selective locking means for the spacer member during operation of the bobbin holder.

  The selection of a suitable spacer member is illustrated in the form of the following example. However, this example should not be construed to limit the scope of the invention.

[Example 1]
The adjustable braking force under variable spinning conditions is determined by considering factors such as roving tension under various spinning conditions. In conventional bobbin holders, at least three different brake tensioners (usually metal springs) are used. That is, the first is a tensioner for a fine count yarn, the second is a tensioner for a medium count, and the third is a tensioner for a coarse count. When the braking force of each spring was measured for each count, the following average value was obtained.
Count Brake force Gram count 10
Medium count 20
Coarse count 40

Several experiments were conducted to determine how far a new spring must be pushed down to simulate the braking force. Table 1 shows details of the experiments performed on 50 springs to reach the average value.

  It has been observed that the new spring provides a braking force that matches the required braking force in the fine, medium and coarse counts described above when pushed down by 4 mm, 8 mm and 16 mm. When the tensioner is assembled without any spacers, the tensioner is compressed 4 mm, which is suitable for fine counts. When a further 3 mm spacer is introduced, the tensioner is compressed 7 mm. The thickness of the upper surface of the skirt member contributes to the remaining 1 mm. Therefore, the overall compression is 8 mm. This setting is used in the middle count. The other spacer of 8 mm provides a setting for a coarse count that results in an overall compression length of 16 mm. The result is shown in FIG. The graph shows the rigidity characteristics, and the settings for fine count, medium count, and coarse count are clearly estimated by the rigidity characteristics.

  A spacer whose thickness can be changed, such as 3 mm or 7 mm, is selected in order to obtain a variable braking force in the tensioner. The thickness of the spacer determines the distance that the spring is compressed, in other words the increase of the braking force exerted by the spring. Other thickness spacers can be used depending on the spinning conditions in the factory.

  The flexibility of the braking force exerted by the tensioner can only be brought about by providing a means for releasing one end of the tensioner and setting the compression length to various levels. Since the lower end of the tensioner must be placed on the brake shoe 17, the upper end must be released. It must be possible to gradually compress the tensioner to provide a variable braking force.

  With such a configuration, an operator in the spinning factory can finely adjust the bobbin holder braking system to set the machine requirements. In addition, since the addition and removal of the washer is performed from the outside without opening the bobbin holder, the setting at the time of shipment does not have to be altered.

  The spacers are given a bright color so that they can be viewed from a distance and to ensure that all spindles operate at the same setting. Any change can be detected immediately, thus incorporating elements that prevent unauthorized modification (contamination).

  However, solid spacers 27 or 29 can be used in place of the specific snap spacers 26 or 28 if the factory requires measures to prevent tampering at a higher level. In this case, the spacer can be added and removed only by removing the bobbin holder from the creel, thereby providing further measures for preventing tampering.

  In another embodiment of the variable braking force bobbin holder of the present invention illustrated in FIG. 3, the pin 31 generates a desired braking force instead of a spacer. On the stud member 25, a set of two small holes 32 and 33 into which a pin can be inserted is provided. As shown in FIG. 3, the pin 31 is inserted into the holes 32 and 33 after the skirt member 18 is pushed down, whereby a high braking force is obtained. In the present invention, such two holes are provided to provide two different settings. However, the number of holes can be varied appropriately to obtain the desired braking force corresponding to the count.

  In operation, the bobbin is then attached to the bobbin holder by pushing up the weight collar. When the shoulder of the hole inside the bobbin passes the finger during the mounting stroke, the mechanism operates to swing the finger away and the bobbin is held. The roving from the bobbin is supplied into the spinning machine via a roller in the spinning machine. The yarn is pulled out of the bobbin by a machine, whereby the bobbin is rotated and the yarn is fed out of the bobbin. This tensile force applied to the yarn is generally called roving tension. If the count changes this pulling force, i.e., the roving tension changes, then it is necessary to change the braking force. This is accomplished by pushing the skirt member down and inserting a suitable spacer at the upper end of the skirt member.

  Without the spacer, the skirt member takes its top dead center position and the tensioner is compressed by about 4 mm. This setting is suitable for fine counts. If it is necessary to spin the middle count, a smaller spacer, for example as provided as article 28 or 29 in FIG. 5, is inserted on the stud member on the upper side of the skirt member. If the coarse count is spun, this setting can be achieved by inserting another spacer at the top of the spacer or by removing the spacer completely and adding a thicker spacer, shown as article 26 or 27 in FIG. Be changed. By this method, a desired braking force can be obtained.

(advantage)
1. The rotating bobbin holder of the present invention can select a braking force from a light braking force to a strong braking force by a single tensioner member used in combination with a spacer or a pin.
2. The change from one count to another count during the spinning operation is performed without opening the bobbin holder, without changing the tensioner, or without replacing the bobbin holder.
3. In the present invention, a set of bright colors is imparted to the spacers, so that high visibility is obtained even at long distances with respect to settings in which different spindles are operating, and elements that prevent cheating or tampering Is incorporated.

1 is a cross-sectional view of a bobbin holder of the present invention showing an exemplary variable braking force element. FIG. FIG. 2 is an exploded view of FIG. 1 showing an arrangement of variable braking force elements. FIG. 6 is an exploded view of the bobbin holder of the present invention with respect to another embodiment in the form of a pin that is disposed on the body of the stud member and functions as a spacer to provide the desired braking force. FIG. 6 shows a perspective view of the stud member of the present invention with other suitable geometric shapes. 3 shows an exemplary shape of a spacer member used in the bobbin holder of the present invention. It is the partial cutaway view of the skirt member of the bobbin holder of this invention which shows the state to which the main body of the stud member was attached, and the inverted view which shows a hexagonal recessed part. FIG. 6 is a graph showing the stiffness characteristics of a new spring and exemplary settings for obtaining desired results at various counts.

Claims (10)

The trunk has a bobbin suspension tube having an upper wide barrel and a lower narrow trunk, and the trunk has a pair of bobbin holding fingers for holding and releasing the bobbin, and is connected to the textile ring spinning machine A rotating bobbin holder,
(A) a stud member having a curved surface for receiving a bearing assembly and a smooth neck extending from the head and terminating at a substantially barrel-shaped bulge;
(B) The length of the stud member can be changed, the main body of the stud member having a substantially non-circular cross section and extending from the neck, and the main body further extends as a screw-shaped portion.
(C) The stud member is disposed to penetrate a small hole in the upper surface of the wide barrel, and a head having a bearing assembly rotates on the upper inner surface of the barrel to provide rotational motion to the bobbin suspension tube. Abutting possible,
(D) a brake shoe having a central opening through which the stud member can be inserted, wherein the brake shoe is disposed on the outer upper surface of the barrel for applying a variable braking force by the brake tensioner, The side is functionally connected to the upper surface of the brake shoe, and on the other side of the tensioner is a tensioner support member having a shape corresponding to the body of the stud member,
(E) A small hole having a corresponding shape of the main body of the stud member is provided on the upper surface thereof, and an enlarged skirt member having an open lower end is provided, and the skirt member can be inserted through the stud member. And is arranged to surround the upper wide barrel,
(F) In order to functionally support the skirt member in a non-rotatable manner, the skirt member includes a relative surface shape portion corresponding to the outer shape of the tensioner support member provided on the inner surface of the upper end of the skirt member;
(G) at least one of the desired thickness and with locking means for compressing and releasing the tensioner and for generating a desired variable braking force by the bobbin suspension tube; A spacer member is disposed on the body of the stud member and provided on the upper surface of the skirt member;
Rotating bobbin holder.   The bobbin holder according to claim 1, wherein the variable length of the body of the stud member corresponds to the length and tensile strength of the brake tensioner.   The cross-sectional shape of the main body of the stud member is an ellipse, a square, a star, and a substantially circular body having a wing shape portion around it, preferably a substantially circular body having a wing shape portion around. Bobbin holder.   The bobbin holder according to claim 1, wherein the brake tensioner is a metal spring, a rubberized spring or a rubber sleeve.   The bobbin holder according to claim 1, wherein the tensioner is disposed so as to cover a region between an upper surface of the brake shoe and a start portion of the threaded portion of the stud member.   The bobbin holder according to claim 1, wherein the spacer member is a detachable spacer having a variable size corresponding to a braking / rotating torque corresponding to a count of a spun yarn.   The bobbin holder according to claim 6, wherein the locking means of the removable spacer member is a snap fit or press fit with or without an additional lock pin.   The bobbin holder according to claim 1, wherein the spacer member is a non-removable solid spacer having a variable size corresponding to braking / rotation torque.   The bobbin holder according to claim 8, wherein the inner shape of the non-removable spacer member is a threaded shape or a screwless shape.   The bobbin holder according to claim 1, wherein a stopper pin is disposed on the stud member instead of the spacer.

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