JP2010126363A - Thread tension device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thread tension device with high flexibility capable of using even different kinds of threads by requiring very short time to be spent. <P>SOLUTION: This thread tension device 1 has an inlet guide 5, an outlet guide 6 and a thread drum 3 between the guides 5 and 6. The thread drum 3 has a rotation axis 22 and an operation region 14. A thread path is extended in a peripheral direction between the inlet guide 5 and the outlet guide 6 on the operation region 14. The operation region 14 therefore is divided into first and second regions 15 and 16 having different characteristics in an axis direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a yarn tensioning device having an inlet guide, an outlet guide, and a yarn drum provided between the inlet guide, the yarn guide, the yarn drum having a rotation axis and an operating area, and the yarn guide between the inlet guide and the outlet guide. The yarn path connecting the two extends in the circumferential direction on the operating region.

  Such a yarn tension device is known, for example, from US Pat. The yarn tensioning device is used to give the yarn drawn from a bobbin disposed in the creel a desired tension for subsequent processes. For this reason, the yarn drum can be driven, for example, at a speed that is braked or different from the moving speed of the yarn. As the yarn passes through the yarn path, the yarn abuts the yarn drum within the operating area of the yarn drum and is braked or accelerated accordingly to produce the desired tension on the yarn.

German Patent Application Publication No. 4324412

  Different yarns generally have different yarn characteristics. Therefore, even a yarn drum that cooperates well with one type of yarn may not function with another type of yarn. Therefore, the yarn drum can be exchanged according to the type of yarn used. When configured in this manner, the operator uses a yarn drum suitable for the type of yarn used.

  Generally, one thread tension device is required for one bobbin position in the creel. It is quite possible that hundreds of bobbin positions are provided in one creel. Even if the time required to replace one thread drum is only 15 seconds, for example, if there is an 800 bobbin position in one creel, it takes 200 minutes, ie more than 3 hours, to replace all thread drums. Become.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a yarn tension device that has a high flexibility so that it can be used with different yarn types with little time spent.

  The object is to provide a yarn tensioning device having an inlet guide, an outlet guide and a yarn drum between them, the yarn drum having a rotation axis and an operating area, and between the inlet guide and the outlet guide. This is solved by dividing the operating region into at least two sections having different characteristics in the axial direction.

  According to the present invention, a plurality of different yarn types can be processed with one yarn drum. The worker may arrange the yarn passed through the yarn tension device in a corresponding area of the operation region according to the yarn type. Arranging the yarn in an area corresponding to the type of yarn that is segmented in the axial direction is substantially additional for the operator, since processing the yarn is a necessary task anyway when changing the yarn. It will not be a great effort. Therefore, different yarn types can be processed with the same yarn tension device without increasing the labor of the worker.

  In the above invention, it is preferable that the first area of the areas has a smooth contact surface. According to this configuration, it is used when adjusting the tension of a thread whose smooth contact surface is easily damaged. Even if the thread that is susceptible to pain is a smooth contact surface, sufficient frictional force is obtained and the thread is joined to the contact surface. In some cases, by winding the yarn around the yarn drum with a plurality of winding layers, the frictional force acting on the yarn at the time of joining can be increased.

  The said structure WHEREIN: It is preferable that the said smooth contact surface makes an acute angle with a rotating shaft line. That is, the contact surface is formed in a conical shape. According to this configuration, the yarn path can be formed so that the yarns of the wound layers do not cross each other.

  In the present invention, the second area of the areas preferably has a V-shaped groove. According to this configuration, by inserting the yarn into the V-shaped groove, the frictional force between the yarn drum and the yarn wound around the yarn drum can be increased.

  In the above configuration, it is preferable that at least one wall defining the groove is provided, and teeth and tooth grooves are alternately arranged on the wall. Such a configuration is also referred to as a “clip wheel”.

  According to the above configuration, the clip wheel has an advantage that a good frictional force can be generated between the yarn drum and the yarn. However, in clip cars, dirt, such as residual finish, can be deposited. For this reason, in the case of yarn that is susceptible to pain, the filament may be exposed.

  The said structure WHEREIN: It is preferable that the said groove | channel is formed between two board | plates, and the board of the said 1st area side comprises the boundary of the said 2nd area and the said 1st area.

  According to the said structure, the board of the 1st area side makes a boundary between the 1st and 2nd area. Thus, no other configuration is required to prevent the yarn from moving from the first zone to the second zone or vice versa during operation. Rather, the boundary between the first zone and the second zone is created by forming the second zone.

  In the invention, the inlet guide and / or the outlet guide are adjustable relative to the yarn drum between a first position corresponding to the first zone and a second position corresponding to the second zone. Preferably there is.

  According to the above configuration, by the adjustment, the position of the inlet guide and / or the outlet guide is adjusted in a direction parallel to the rotation axis, and the position of the yarn drum is adjusted in a direction parallel to the rotation axis. This makes it possible to assign the yarn to the corresponding correct area when entering and / or leaving. Therefore, the tension acting on each yarn can be kept small.

  In the above invention, it is preferable that the yarn guide mechanism includes at least one movable yarn guide element, and the yarn guide mechanism is disposed between the yarn drum and the inlet guide and / or the outlet guide.

  According to the said structure, a thread | yarn guide element receives spring force from a spring, for example. With the yarn guide element, it is possible, among other things, to change the force with which the yarn is wound around the yarn drum.

  In the above configuration, the positions of the yarn guide element and the yarn drum can be relatively changed in a direction parallel to the rotation axis.

  According to the above configuration, it is possible to prevent a tension higher than that allowed for the yarn from being applied even when passing through the yarn guide element. In addition to adjusting the position of the thread guide element alone, the position of the entire thread guide mechanism can also be adjusted relative to the thread drum, which also allows the position of at least one of the thread drum and the thread guide mechanism to be adjusted. Can be adjusted.

  In the invention, a damping mechanism is disposed on the yarn path behind the inlet guide, and the damping mechanism can be relatively changed in a direction parallel to the rotation axis with respect to the yarn drum. Preferably there is.

  According to the above configuration, when the yarn is pulled out from the top of the bobbin to generate a “balloon”, the tension of the yarn circulating around the yarn drum can be made uniform by the vibration control mechanism. Since the position of the vibration damping mechanism can be adjusted in a direction parallel to the rotation axis, the yarn path is formed in a desired direction, preferably in one plane, when the yarn is processed by the yarn tension device. Can be. However, when the yarn is guided through a conically inclined smooth surface, the yarn inlet and outlet can be spaced apart from each other in a direction parallel to the axis of rotation.

  According to the yarn tension device according to the present invention, it is possible to achieve a high degree of flexibility that can be used with different yarn types with little time spent.

It is a side view of a yarn tension device. FIG. 2 is a plan view of the yarn tension device shown in FIG. 1. It is a perspective view of a yarn drum.

  Hereinafter, the present invention will be described with reference to the drawings based on preferred embodiments.

  A yarn tension device 1 shown in FIG. 1 has a base 2 on which a yarn drum 3 is rotatably supported. The yarn drum 3 is coupled to an electric motor 4 that can also operate as a generator so as not to rotate relative thereto. On the base 2, an inlet guide 5 and an outlet guide 6 are arranged.

  The yarn 7 is passed through the inlet guide 5, wound around the yarn drum 3, and passed through the outlet guide 6. A vibration damping mechanism 8 is disposed between the inlet guide 5 and the yarn drum 3. The vibration damping mechanism 8 is formed by two cones 9 and 10 formed in a conical shape, and the plates 9 and 10 are stacked with their small-diameter leading ends facing each other. The damping mechanism 8 attenuates the vibration of the yarn 7. The vibration of the yarn 7 is caused, for example, when the yarn 7 is pulled out from the top of the bobbin not shown in detail. Even if the yarn 7 is pulled out from the top of the bobbin to generate a “balloon”, the vibration damping mechanism 8 can make the tension of the yarn circulating around the yarn drum 3 uniform.

  A yarn guide mechanism 11 is disposed between the yarn drum 3 and the outlet guide 6. The yarn guide mechanism 11 includes a movable yarn guide element 12. The yarn guide element 12 can move so as to substantially cross the direction of the double arrow 13, that is, the traveling direction of the yarn 7. The yarn guide element 12 can give a constant pretension to the yarn by a spring not shown in detail.

  As can be seen from FIGS. 1 and 3, the yarn drum 3 has an operation area 14, which has a first area 15 and a second area 16.

  The first area 15 has a smooth contact surface for winding the yarn 7 and is slightly inclined in a conical shape (see FIG. 1). That is, the contact surface forms an acute angle with the rotation axis 22 of the yarn drum 3 when viewed from the side. A lid plate 17 is provided at the smaller diameter end (the top of the head) of the first area 15. The lid plate 17 slightly protrudes outward from the first area 15 in the radial direction. Thereby, it is possible to prevent the yarn 7 wound around the first area 15 from being pulled out from the top of the first area 15.

  When the first area 15 is formed in this manner, a smooth contact surface can be used when adjusting the tension of a fragile yarn. Even if the thread that is susceptible to pain is a smooth contact surface, sufficient frictional force is obtained and the thread is joined to the contact surface. In some cases, by winding the yarn 7 around the yarn drum 3 with a plurality of winding layers, the frictional force acting on the yarn at the time of joining can be increased. Further, since the contact surface is formed in a conical shape with an acute angle with the rotation axis 22, the yarn path can be formed so that the yarns 7 of the respective wound layers do not cross each other.

  The second area 16 has a V-shaped groove 18 that is recessed radially inward. As can be seen from FIG. 3, the second section 16 is formed with at least one wall 19 (e.g., an upper wall) defining a groove 18, in which the tooth 20, the tooth groove 21, Are arranged alternately. The second area 16 is formed as a “clip wheel”. When the yarn 7 is wound around the second section 16, the yarn 7 is joined to the clip wheel while receiving a relatively good frictional force.

  By inserting the yarn 7 into the V-shaped groove 18, the frictional force acting between the yarn drum 3 and the yarn 7 wound around it can be strengthened. Further, since the second section 16 is formed as a clip wheel, there is a disadvantage that the filament can be exposed because dirt, for example, a residual finish is deposited, but a good frictional force between the yarn drum 3 and the yarn. It has the advantage that can be produced.

  The groove 18 is formed between the two plates 23 and 24. The plate 23 on the first area 15 side has a slightly larger diameter than the end of the second area 16 on the plate 24 side. The plate 23 forms a boundary with the first area 15 above the second area 16. That is, the yarn 7 does not slip from the first zone 15 to the second zone 16 or vice versa.

  The yarn drum 3 has an extension 30 in which a hole 25 is formed in a surface on the base 2 side (a bottom surface in FIG. 3). The rotation shaft of the motor 4 can be fitted into the hole 25. By fitting the rotating shaft of the motor 4, the yarn drum 3 can be coupled to the motor 4 so as not to be relatively rotatable.

  As indicated by the double-headed arrows 26 to 29, the individual constituent elements of the yarn tension device 1, specifically, the yarn drum 3, the inlet guide 5, the outlet guide 6, the vibration damping mechanism 8, and the yarn guide mechanism 11 are arranged on the rotation axis 22. It is possible to move in a direction parallel to the direction of the element, and thereby the position of each constituent element can be adjusted. In order to simplify the following description, hereinafter, the adjustment in the directions of the two-way arrows 26 to 29 may be simply referred to as “axial direction adjustment”. Even in such an axial direction adjustment, the position can be changed in other directions.

  As shown in FIG. 1, when it is desired to guide the yarn 7 not through the first section 15 but through the second section 16, the position of the yarn drum 3 in the axial direction is adjusted as the simplest method. Thereby, in the embodiment shown in FIG. 1, the yarn drum 3 can be further separated from the base portion 2. Then, it is preferable that the remaining constituent elements are kept in that position, and the exit guide 6 and the yarn guide mechanism 11 are further brought closer to the base 2.

  In this way, by configuring so that the positions of the yarn guide mechanism 11 and the yarn drum 3 can be adjusted in the axial direction, even when passing through the yarn guide element 12, an excessive tension is not applied to the yarn. can do. In addition, not only when the position of the entire yarn guide mechanism 11 can be adjusted relative to the yarn drum 3, the position may be adjusted by the yarn guide element 12 alone.

  When it is desired to guide the yarn 7 through the second section 16, there is another method in which the inlet guide 5, the outlet guide 6, and the vibration control mechanism 8 are brought closer to the base 2 in the direction of the double arrows 26 to 28. . It is of course possible to combine both axial adjustments, this method and the previous method.

  Further, by adjusting the axial direction of the position of the vibration damping mechanism 8, when the yarn is processed by the yarn tension device 1, the yarn path is formed in a desired direction, preferably in one plane. it can. However, when the yarn 7 is guided through a conically inclined smooth surface, the inlet and the outlet of the yarn 7 can be separated from each other in a direction parallel to the rotation axis 22.

  It is of course possible for the yarn drum 3 to have a different area than both areas 15, 16 shown. However, usually only two different areas are required.

  According to the yarn tension device 1 of this embodiment, a single yarn drum 3 can process a plurality of different yarn types. The worker may arrange the thread passed through the thread tension device 1 in the corresponding sections 15 and 16 of the first and second sections 15 and 16 according to the thread type. Since the processing of the yarn 7 is a necessary work anyway when the yarn 7 is replaced, it is substantially possible to arrange the yarn 7 in the areas 15 and 16 corresponding to the yarn types divided in the axial direction. It is not an additional labor for the workers. Therefore, different yarn types can be processed by the same yarn tension device 1 without increasing the labor of the worker. That is, in the yarn tension device 1, it is possible to achieve a high degree of flexibility that can be used with different yarn types with little time spent.

  The present invention is not limited to the embodiments, and can be added, deleted, and changed without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Yarn tension device 2 Base 3 Yarn drum 5 Inlet guide 6 Outlet guide 7 Yarn 8 Damping mechanism 11 Yarn guide mechanism 12 Yarn guide element 14 Operation area 15 1st area 16 2nd area 18 Groove 19 Wall 20 Tooth 21 Tooth groove 22 Axis of rotation 23 plate

Claims (10)

A yarn tensioning device (1) having an inlet guide (5), an outlet guide (6), and a yarn drum (3) provided therebetween, wherein the yarn drum (3) operates with a rotation axis (22). A yarn path extending between the inlet guide (5) and the outlet guide (6) extends in the circumferential direction of the yarn drum.
The yarn tension device, wherein the operating region (14) is divided into at least two sections (15, 16) having different characteristics in the axial direction.   The yarn tensioning device according to claim 1, characterized in that the first zone (15) of the zones has a smooth abutment surface.   The yarn tensioning device according to claim 2, characterized in that the smooth contact surface forms an acute angle with the rotational axis (22).   The yarn tensioning device according to claim 1, characterized in that the second zone (16) of the zones has a V-shaped groove (18). Said second section (16) has at least one wall (19) defining said groove (18);
5. A thread tension device according to claim 4, characterized in that teeth (20) and tooth spaces (21) are arranged alternately on the wall (19).   The groove (18) is formed between two plates (23, 24), and the plate (23) on the side of the first section (15) is connected to the second section (16) and the first section ( The yarn tension device according to claim 4 or 5, characterized in that it forms a boundary with 15).   Said inlet guide (5) and / or outlet guide (6) correspond to a first position corresponding to the first zone (15) and a second zone (16) relative to the yarn drum (3). The yarn tension device according to any one of claims 1 to 6, wherein the yarn tension device is adjustable between the second position and the second position. A thread guide mechanism (11) with at least one movable thread guide element (12);
The yarn guide mechanism (11) is arranged between the yarn drum (3) and the inlet guide (5) and / or the outlet guide (6). The yarn tension device according to claim 1.   The yarn tensioning device according to claim 8, characterized in that the positions of the yarn guide element (12) and the yarn drum (3) can be changed relatively in a direction parallel to the rotational axis (22). A damping mechanism (8) is disposed downstream of the inlet guide (5) on the yarn path,
The vibration damping mechanism (8) is capable of changing its position relative to the yarn drum (3) in a direction parallel to the rotation axis (22). The yarn tension device according to claim 1.

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