JP6533144B2 - Belt type false twisting device - Google Patents

Description

  The present invention relates to a belt type false twisting apparatus that performs false twist processing on yarn by running the belt in a state in which the yarn is sandwiched between two crossing belts.

  The belt type false twist apparatus described in Patent Document 1 includes two belt units of a reference belt unit and a movable belt unit. The reference belt unit has an endless reference belt, and a drive pulley and a driven pulley on which the reference belt is hung. The movable belt unit has an endless movable belt, and a drive pulley and a driven pulley on which the movable belt is hung. The reference belt and the movable belt intersect at a central portion of a portion between the drive pulley and the driven pulley. Further, the movable belt unit is configured to be movable in the direction orthogonal to the opposing portions of the reference belt and the outer peripheral surface of the movable belt. And the belt type false twist apparatus of patent document 1 performs false twist processing to a thread | yarn by running a reference | standard belt and a movable belt in the state which pinched | interposed the thread | yarn by the reference | standard belt and a movable belt.

  Further, in the belt type false twisting device described in Patent Document 1, an untwisting disk ("untwisting point fixing member" according to the present invention) which rotates with the drive pulley is provided on a drive pulley of a reference belt unit. The yarn is bent by coming into contact with the outer peripheral edge of the untwisting disc at a portion downstream of the yarn path from the intersection (cross point) where the reference belt and the movable belt intersect. Here, when running these belts in a state in which the yarn is sandwiched between the reference belt and the movable belt, the yarn is twisted at a portion on the upstream side of the yarn path than the crossing portion, and from the crossing portion The yarn is also untwisted in the downstream part of the yarn path. At this time, if the untwisting start point is located at the intersection, the untwisted yarn rubs against the reference belt and the movable belt, and fluff is generated in the yarn. In addition, the longer the untwisted yarn is rubbed with the reference belt and the movable belt, the longer the untwisting start point is located on the upstream side of the yarn path in the intersection, and the yarn fluffs Is more likely to occur. In Patent Document 1, since the yarn is in contact with the outer peripheral edge of the untwisting disc at a portion on the downstream side of the yarn path than the intersection, the untwisting of the yarn is a portion between the intersection and the untwisting disc And the untwisting start point is fixed on the untwisting disc. As a result, the untwisting start point can be located on the downstream side of the yarn path as compared with the case where there is no untwisting disc. This can prevent fluff from being generated in the yarn.

Unexamined-Japanese-Patent No. 2010-65354

  Here, in the belt type false twist apparatus described in Patent Document 1, when the yarn is sandwiched between the reference belt and the movable belt, the reference belt and the movable belt bend. At this time, in order to evenly bend the reference belt and the movable belt, the central portion of the portion between the drive pulley and the driven pulley of the reference belt and the central portion of the portion between the drive pulley and the driven pulley of the movable belt And preferably intersect with each other. On the other hand, in Patent Document 1, in order to sufficiently suppress the untwisting of the yarn between the intersection of the reference belt and the movable belt and the untwisting disc and fix the untwisting start point on the untwisting disc, It is preferable to arrange the intersection and the untwisting disc in close proximity. In the reference belt unit and the movable belt unit, if the drive pulley and the driven pulley are disposed close to each other, these conditions can be satisfied.

  However, in the reference belt unit and the movable belt unit of Patent Document 1, when the drive pulley and the driven pulley are disposed close to each other, the lengths of the reference belt and the movable belt become short. Here, in Patent Document 1, the reference belt and the movable belt rub against the yarn at the intersection, and heat is generated by the frictional heat at this time. At this time, when the lengths of the reference belt and the movable belt are short, after a portion of the reference belt and the movable belt reaches the intersection, the portion of the reference belt and the movable belt reaches the intersection next The time will be shorter. Therefore, after each portion of the reference belt and the movable belt reaches the intersection and generates heat by friction with the yarn, it reaches the intersection again and generates heat by friction with the yarn before it is sufficiently cooled. become. As a result, the reference belt and the movable belt have a high overall temperature and a reduced durability. Further, at this time, since the frictional heat between the belt and the yarn becomes larger as the thickness of the yarn becomes thicker, the possibility of causing the above-mentioned problems becomes higher. In addition, the belt is bent at the portion where it is hung on the pulley, but if the length of the belt is short, the number of times that each portion of the belt reaches the pulley and is bent increases as the belt travels. As a result, breakage or peeling of the core of the belt is likely to occur and the durability of the belt is reduced.

  An object of the present invention is to provide a belt type false twisting device capable of preventing a decrease in the durability of a belt while disposing a drive pulley and a driven pulley close to each other.

  The belt type false twisting device according to the first invention comprises two belt units each having an endless belt and a drive pulley and a driven pulley on which the belt is hung, and the belts of the two belt units The belts are arranged to intersect each other in the central portion of the portion between the drive pulley and the driven pulley, and sandwich the yarn at the intersecting portions of the belts of the two belt units. A belt type false twisting apparatus for false twisting a yarn by traveling, wherein one belt unit of the two belt units rotates with the drive pulley by being provided on the drive pulley, the yarn The untwisting point for suppressing the untwisting of the yarn and fixing the untwisting start point by coming into contact with the downstream side portion of the yarn path with respect to the portion sandwiched by the belts of And a belt extension pulley disposed on the opposite side to the drive pulley with respect to the driven pulley and on which the belt is hooked. .

  According to the present invention, the yarn is twisted at a portion on the upstream side of the yarn path with respect to a rhombus portion (hereinafter referred to as "cross point") at which the belts of two belt units intersect. The yarn is untwisted in the downstream portion of the yarn path than the cross point. At this time, if the untwisting start point is located within the cross point, the untwisted yarn and the belt may be rubbed, which may cause fuzz on the yarn. Furthermore, when the untwisting start point is located on the upstream side of the yarn path among the cross points, the length of rubbing between the untwisted yarn and the belt becomes longer, and fluff is easily generated in the yarn . However, in the present invention, the yarn passing through the cross point is in contact with the untwisting point fixing member, the untwisting of the yarn is suppressed between the cross point and the untwisting point fixing member, and the untwisting start point is unwound. It is fixed on the twisting point fixing member. Thereby, compared with the case where there is no untwisting point fixing member, the start point of an untwisting can be located in the downstream of a yarn path. Therefore, generation of fluff on the yarn can be suppressed.

  At this time, the belt of each belt unit bends in the portion between the drive pulley and the driven pulley, but in order to make the bending of the belt uniform, the belts of the two belt units are the drive pulley and the driven pulley. Preferably, they intersect at the central part of the part between them. On the other hand, in order to sufficiently suppress the untwisting of the yarn between the cross point and the untwisting point fixing member to fix the untwisting start point on the untwisting point fixing member, the cross point and the untwisting point fixing member It is preferable to arrange and as close as possible. In each belt unit, if the drive pulley and the driven pulley are disposed close to each other, these conditions can be satisfied.

  However, unlike the present invention, in the case where the belt is hung only on two pulleys, the drive pulley and the driven pulley, when the drive pulley and the driven pulley are disposed close to each other, the length of the belt becomes short. It will Here, the belts of the two belt units generate heat due to frictional heat when they are rubbed with the yarn at the cross points. At this time, when the length of the belt is short, it takes a short time for this portion of the belt to reach the cross point next after the portion of the belt reaches the cross point. Therefore, each portion of the belt reaches the cross point and generates heat by friction with the yarn, and then reaches the cross point again and further generates heat by friction with the yarn before it is sufficiently cooled. As a result, the belts of the respective belt units have a high overall temperature and a reduced durability. Further, at this time, since the frictional heat between the belt and the yarn becomes larger as the thickness of the yarn becomes thicker, the possibility of causing the above-mentioned problems becomes higher. In addition, the belt is bent at the portion where it is hung on the pulley, but if the length of the belt is short, the number of times that each portion of the belt reaches the pulley and is bent increases as the belt travels. As a result, breakage or peeling of the core of the belt is likely to occur and the durability of the belt is reduced.

  Therefore, in the present invention, each belt unit is provided with a belt extension pulley disposed on the side opposite to the drive pulley with respect to the driven pulley and on which the belt is hung. Thereby, the length of the belt can be made longer than the case without the belt extension pulley. When the length of the belt is increased, each portion of the belt reaches the cross point and generates heat by friction with the yarn, and after sufficiently cooled, reaches the cross point again and generates heat by friction with the yarn. become. Therefore, regardless of the thickness of the yarn, it is possible to suppress the temperature rise of the entire belt and to prevent the deterioration of the belt durability. Furthermore, as the belt length increases, the number of times each portion of the belt reaches the pulley and bends as the belt travels decreases. Thereby, the deterioration of the durability of the belt due to the breakage or peeling of the core material of the belt can be suppressed.

  A belt type false twisting device according to a second aspect of the present invention is the belt type false twisting device according to the first aspect, wherein the belts of the two belt units are in contact with each other, and the belts of the two belt units In any of the states where the two are not in contact with each other, the driven pulley causes the belt to bend, and the belts of the two belt units are bent to the drive pulley and the driven pulley. It intersects in the middle of the part between the parts.

  According to the present invention, since the belt is in close contact with the driven pulley disposed between the drive pulley and the belt extension pulley, when the drive pulley is driven to run the belt, the driven pulley is reliably rotated. be able to.

  A belt type false twisting apparatus according to a third aspect of the present invention is the belt type false twisting apparatus according to the second aspect, wherein the belt by the driven pulley is in a state where the belts of the two belt units are not in contact with each other. Bending angle is 0.5 degrees or more.

  According to the present invention, when the bending angle of the belt by the driven pulley is 0.5 degrees or more, when the driving pulley is driven to travel the belt, the driven pulley can be more reliably rotated.

A belt type false twisting apparatus according to a fourth invention is the belt type false twisting apparatus according to the second or third invention, wherein a diameter of the drive pulley is the same as a diameter of a driven pulley, or the driven pulley smaller than the diameter, the diameter of the belt extension pulley is smaller than the diameter of the driven pulley.

  According to the present invention, when the diameter of the drive pulley is equal to or less than the diameter of the driven pulley and the diameter of the belt extension pulley is smaller than the diameter of the driven pulley, the belt can be reliably bent at the driven pulley.

Fifth belt type false twist device according to the invention, in the belt type false twist device according to the fourth invention, the driving pulley, as viewed from the axis Direction of the driven pulley and the belt extension pulley, the driven pulley The two shafts of the belt units are offset from the straight line connecting the shaft of the drive pulley and the shaft of the belt extension pulley so that the belts of the two belt units intersect.

  If the difference in diameter between the pulleys is small, the belt may not be able to be sufficiently bent at the driven pulley. In the present invention, since the shaft of the driven pulley is offset from the straight line connecting the shaft of the drive pulley and the shaft of the extension pulley to the side where the belts of the two belt units intersect, the driven pulley Can be bent more reliably.

A belt type false twist device according to a sixth aspect of the present invention is the belt type false twist device according to the second or third aspect, wherein the diameter of the drive pulley, the diameter of the driven pulley, and the diameter of the belt extension pulley Is the same,
Said drive pulley, as viewed from the axis Direction of the driven pulley and the belt extension pulley, the axis of the driven pulley, is arranged offset from a straight line passing through the axis of said extension pulley and the axis of the drive pulley There is.

According to the present invention, when the diameter of the drive pulley and the driven pulley and the belt extension pulley is the same, as viewed from the axis Direction of the pulley, the axis of the driven pulley, connecting the axes of the belt extension pulley of the drive pulley By displacing the straight line, the belt can be bent at the driven pulley. Further, in this case, since the diameters of the drive pulley, the driven pulley, and the extension pulley are the same, parts can be shared by the drive pulley, the driven pulley, and the extension pulley.

  A belt type false twist device according to a seventh invention is the belt type false twist device according to any one of the first to sixth inventions, wherein at least one of the two belt units is a belt unit of the drive pulley. The shaft and the shaft of the driven pulley are fixed to each other, and the shaft of the belt extension pulley is configured to be movable with respect to the shaft of the drive pulley and the shaft of the driven pulley, and the shaft of the belt extension pulley is And a moving device for moving the shaft of the drive pulley and the shaft of the driven pulley.

According to the present invention, the tension of the belt can be adjusted by moving the shaft of the belt extension pulley with respect to the shaft of the drive pulley and the shaft of the driven pulley. As a result, the contact pressure of the belts of the two belt units can be adjusted to control the force applied to the yarn from the belt unit (the force to send the yarn and the force to apply twist to the yarn).

  Here, in order to stabilize the above-described yarn-feeding force and the force for applying twist to the yarn, it is necessary to bring the surfaces of the two belt units in contact with each other into close contact with each other. Also, the belts of the two belt units contact each other at a portion located between the drive pulley and the driven pulley. On the other hand, unlike the present invention, when the tension of the belt is adjusted by moving either the shaft of the drive pulley or the shaft of the driven pulley, the moved shaft tilts when the shaft of the pulley is moved. As a result, there is a possibility that the portion of the belt located between the drive pulley and the driven pulley may be inclined. And if such an inclination arises in a belt, there exists a possibility that the adhesiveness of the belts of two belt units may fall.

  Therefore, in the present invention, the tension of the belt is adjusted by moving the belt extension pulley. As a result, when adjusting the tension of the belt, the above-described inclination does not occur in the portion located between the drive pulley and the driven pulley of the belt.

  Further, in order to ensure the adhesion between the belts of the two belt units, the shaft of the drive pulley and the shaft of the driven pulley need to be accurately parallel to each other. And for that purpose, high accuracy is required for the structure for supporting a drive pulley and a driven pulley. On the other hand, even if the shaft for the belt extension pulley is slightly inclined with respect to the shaft of the drive pulley and the shaft of the driven pulley, a portion located between the drive pulley and the driven pulley of the belt is thereby made There is no risk of tilting. Therefore, the structure for supporting the shaft of the belt extension pulley and the structure for moving the belt extension pulley do not require so high accuracy and can be simplified.

  According to the present invention, it is possible to prevent the deterioration of the durability of the belt while arranging the cross point and the untwisting point fixing member close to each other.

It is a schematic block diagram of a false twist processing machine concerning an embodiment of the invention. It is a schematic block diagram of the belt type false twist apparatus of FIG. FIG. 2A is a view of FIG. 2 as viewed in the direction of arrow A, and FIG. 2B is a view of FIG. 2 as viewed in the direction of arrow B. It is a figure which shows the state which belts of a belt type false twist apparatus are separated, (a) is a figure corresponding to Fig.3 (a), (b) is a figure corresponding to FIG.3 (b). (A) is a figure which showed the connection structure of three pulleys of a fixed belt unit seen from the axial direction of the pulley of a fixed belt unit, and the figure which looked at (b) from the direction of arrow VB . (A) is a figure which showed the connection structure of three pulleys of a movable belt unit seen from the axial direction of the pulley of a movable belt unit, and the figure which looked at (b) from the direction of arrow VIB. . (A) is a figure equivalent to Fig.3 (a) of the modification 1, (b) is a figure equivalent to Fig.3 (b) of the modification 1. (A) is a figure equivalent to FIG. 3 (a) of modification 2, (b) is a figure equivalent to FIG. 3 (b) of modification 2. FIG. (A) is a figure equivalent to Fig.3 (a) of the modification 3, (b) is a figure equivalent to FIG.3 (b) of the modification 3. FIG. (A) is a figure equivalent to FIG. 3 (a) of modification 4, (b) is a figure equivalent to FIG. 3 (b) of modification 4. FIG. (A) is a figure equivalent to Fig.3 (a) of the modification 5, (b) is a figure equivalent to FIG.3 (b) of the modification 5. FIG. (A) is a figure equivalent to Fig.3 (a) of the modification 6, (b) is a figure equivalent to FIG.3 (b) of the modification 6. FIG. Is a figure equivalent to FIG.3 (b) of the modification 7. FIG.

  Hereinafter, preferred embodiments of the present invention will be described.

  As shown in FIG. 1, the false-twist processing machine 1 according to the present embodiment includes each device (a primary feed roller 20, a primary heating device 21, a cooling device 23, and a belt type described later) configuring a yarn processing unit 12 described later. The false twisting device 24, the secondary feed roller 25, the secondary heating device 26, the tertiary feed roller 27 and the like) are respectively disposed from the creel stand 11 through the yarn processing unit 12 to the winding unit 13 A device elongated in the machine longitudinal direction is a plurality of devices arranged in the horizontal machine longitudinal direction (direction perpendicular to the paper of FIG. 1) orthogonal to the traveling surface of the yarn (paper of FIG. 1). In the false twist processing machine 1, the creel stand 11, the yarn processing unit 12 and the take-up unit 13 are horizontal and perpendicular to the longitudinal direction of the machine base (the left and right in FIG. Are arranged symmetrically).

  The creel stand 11 is provided with a plurality of creels 11a. The plurality of creels 11a each hold a yarn feeding package S.

  The yarn processing unit 12 includes a primary feed roller 20, a primary heating device 21, a cooling device 23, a belt type false twisting device 24, a secondary feed roller 25, a secondary heating device 26, and a tertiary feed roller 26 in order from the upstream side of the yarn path. It has 27.

  The primary feed roller 20 conveys the plurality of yarns Y supplied from the yarn feeding package S toward the primary heating device 21. The primary heating device 21 heats the plurality of yarns Y sent from the primary feed roller 20. Further, a twist preventing guide 22 is disposed immediately upstream of the primary heating device 21 in the yarn path of the yarn Y. The twist prevention guide 22 is for preventing the twist from being transmitted to the upstream side of the twist prevention guide 22 when twisting the yarn Y as described later.

  The cooling device 23 cools the plurality of yarns Y heated by the primary heating device 21. The belt type false twist device 24 applies a false twist process to the yarn Y. At this time, the yarn Y is twisted between the twist prevention guide 22 and the belt type false twisting device 24 and untwisted between the belt type false twisting device 24 and the secondary feed roller 25. Further, at this time, the yarn Y is twisted in a state of being heated by the primary heating device 21, and is cooled and thermally fixed by the cooling device 23 in a state of being twisted. Therefore, when the yarn Y is untwisted, the filaments are in a false-twisted state in which the respective filaments have a wavelike shape. The detailed configuration of the belt type false twist device 24 will be described in detail later.

  The secondary feed roller 25 conveys the yarn Y, which has been false-twisted by the belt type false twisting device 24, toward the secondary heating device 26. The conveyance speed of the yarn Y by the secondary feed roller 25 is higher than the conveyance speed of the yarn Y by the primary feed roller 20, and the yarn Y is different from the conveyance speed by the primary feed roller 20 and the secondary feed roller 25. It is drawn. The secondary heating device 26 performs a predetermined relaxation heat treatment on the yarn Y which has been drawn and subjected to false twisting.

  The tertiary feed roller 27 conveys the yarn Y subjected to the relaxation heat treatment toward the winding unit 13. Further, the tertiary feed roller 27 is disposed at an interval from the secondary heating device 26 in a direction (horizontal direction in FIG. 1) which is horizontal and orthogonal to the longitudinal direction of the machine base. A work table or work carriage (not shown) is provided in the space between the secondary heating device 26 and the tertiary feed roller 27, and a worker performs operations such as hooking on the work bench or work carriage. It can be done.

  The winding unit 13 includes a plurality of winding devices 60. The plurality of winding devices 60 are arranged in the machine longitudinal direction and the vertical direction. The bobbin is attached to the take-up device 60 with the machine longitudinal direction parallel to the axial direction, and the take-up device 60 takes the yarn Y fed from the tertiary feed roller 27 in the axial direction of the bobbin The package P is formed by winding around the bobbin while swinging in the (machine base longitudinal direction).

  Next, the configuration of the belt type false twist device 24 will be described in detail.

  The belt type false twist apparatus 24 includes a fixed belt unit 31 and a movable belt unit 32, as shown in FIGS. The fixed belt unit 31 includes a drive pulley 41, a driven pulley 42, a belt extension pulley 43, a belt 44, and an edge disc 45 (the "untwisting point fixing member" of the present invention).

  The drive pulley 41 and the driven pulley 42 are pulleys of the same diameter D1 (for example, about 40 mm). The belt extension pulley 43 is a pulley having a diameter D2 (for example, about 38.5 mm) smaller than the diameter D1 of the pulleys 41 and 42. The pulleys 41 to 43 are disposed such that the central axes 41 a to 43 a are positioned on the straight line L 1, and the driven pulley 42 is disposed between the drive pulley 41 and the belt extension pulley 43. That is, the belt extension pulley 43 is located on the opposite side to the drive pulley 41 with respect to the driven pulley 42. Further, a motor 46 is connected to the drive pulley 41, and when the motor 46 is driven, the drive pulley 41 rotates in the direction indicated by the arrow E1 in FIGS. Here, in the fixed belt unit 31, the diameters of the drive pulley 41 and the driven pulley 42 are the same D1. As a result, parts can be shared by the drive pulley 41 and the driven pulley 42 constituting the fixed belt unit 31.

  The belt 44 is an endless belt made of a rubber material or the like, and is wound around pulleys 41 to 43. As a result, when the motor 46 is driven to rotate the drive pulley 41, the belt 44 travels and the pulleys 42 and 43 rotate accordingly. At this time, as described above, since the diameter D2 of the belt extension pulley 43 is smaller than the diameter D1 of the pulleys 41 and 42, the belt 44 is bent at the driven pulley 42. As a result, the belt 44 is in close contact with the driven pulley 42 disposed between the drive pulley 41 and the belt extension pulley 43, and when the belt 44 travels, the driven pulley 42 reliably rotates. Here, the bending angle θ of the driven pulley 42 of the belt 44 is 0.5 degrees or more (for example, about 0.89 degrees) in a state where the belt 44 is not in contact with the belt 54 described later.

  The edge disk 45 is a disk-shaped member, is provided on the drive pulley 41, and rotates with the drive pulley 41. Further, as shown in FIG. 3B, the outer edge portion of the edge disk 45 is positioned so that the portion closer to the drive pulley 41 in the axial direction of the edge disk 45 is located radially inward. It is inclined to the direction. The edge disk 45 is for fixing the untwisting start point on the edge disk 45 by suppressing the untwisting of the yarn Y as described later.

  The movable belt unit 32 includes a drive pulley 51, a driven pulley 52, a belt extension pulley 53, and a belt 54. The drive pulley 51 and the driven pulley 52 are pulleys of the same diameter D1. The belt extension pulley 53 is a pulley having a diameter D2 smaller than the diameter D1 of the pulleys 51 and 52. The pulleys 51 to 53 are arranged on a straight line L2 in which the central axis intersects the straight line L1, and the driven pulley 52 is arranged between the drive pulley 51 and the belt extension pulley 53. That is, the belt extension pulley 53 is located on the opposite side to the drive pulley 51 with respect to the driven pulley 52. Further, a motor 55 is connected to the drive pulley 51, and when the motor 55 is driven, the drive pulley 51 rotates in a direction indicated by an arrow E2 in FIG. 2 and FIG. Here, in the movable belt unit 32, the diameters of the drive pulley 51 and the driven pulley 52 are the same D1. Therefore, parts can be made common by the drive pulley 51 and the driven pulley 52 which constitute the movable belt unit 32.

The belt 54 is an endless belt made of a rubber material or the like, and is wound around pulleys 51 to 53. Thus, when the motor 55 is driven to rotate the drive pulley 51, the belt 54 travels, and the pulleys 52 and 53 rotate together. At this time, as described above, since the diameter D2 of the belt extension pulley 53 is smaller than the diameter D1 of the pulleys 51 and 52, the belt 54 is bent at the driven pulley 52. As a result, the belt 54 comes in close contact with the driven pulley 52 disposed between the drive pulley 51 and the belt extension pulley 53, and when the belt 54 travels, the driven pulley 52 reliably rotates. Here, the bending angle θ of the driven pulley 52 of the belt 54 is 0.5 degrees or more (for example, about 0.89 degrees) in a state where the belt 54 is not in contact with the belt 44.

  Next, the connection structure of the three pulleys 41 to 43 in the fixed belt unit 31 and the connection structure of the three pulleys 51 to 53 in the movable belt unit 32 will be described.

  In the fixed belt unit 31, as shown in FIGS. 5A and 5B, the drive pulley 41 is attached to the shaft 61 of the motor. Also, the motor 46 is fixed to the frame 64. The frame 64 is provided with a shaft 62 rotatably supporting the driven pulley 42 and a shaft 63 rotatably supporting the belt extension pulley 43. Thus, the shafts 61 to 63 are fixed in their positional relationship. That is, the positional relationship between the central axis 41a of the drive pulley 41, the central axis 42a of the driven pulley 42, and the central axis 43a of the belt extension pulley 43 is fixed.

  On the other hand, in the movable belt unit 32, as shown in FIGS. 6A and 6B, the drive pulley 51 is attached to the shaft 71 of the motor 55. The motor 55 is also fixed to the frame 74. The frame 74 is provided with a shaft 72 rotatably supporting the driven pulley 52. Thereby, the positional relationship between the shaft 71 and the shaft 72 is fixed. That is, the positional relationship between the central axis 51 a of the drive pulley 51 and the central axis 52 a of the driven pulley 52 is fixed.

Further, a slide member 75 is attached to the end of the frame 74 opposite to the motor 55. The slide member 75 is supported movably in parallel to the straight line L2 with respect to the frame 74 as shown by the arrow H. Further, the slide member 75 is provided with a shaft 73 for rotatably supporting the belt extension pulley 53. Thus, the shaft 73 is movable relative to the shafts 71 and 72. That is, the central axis 53a of the belt extension pulley 53 is movable relative to the central axis 51a and the center axis 52a of the driven pulley 52 of the drive pulley 51. The slide member 75 is moved by a cylinder 76 (the “moving device” of the present invention). As the slide member 75 moves and the shaft 73 moves relative to the shafts 71 and 72, the tension of the belt 54 changes.

Next, the positional relationship between the fixed belt unit 31 and the movable belt unit 32 will be described. A fixed belt units 31 and the movable belt unit 32 includes a central portion of the portion between the central portion of the portion between the drive pulley 41 and the driven pulley 42 of the belt 44, a drive pulley 51 and the driven pulley 52 of the belt 54 And are arranged to intersect. Further, as shown by the arrow F in FIGS. 3A and 3B, the movable belt unit 32 has a direction perpendicular to the portions of the outer peripheral surfaces of the belts 44 and 54 facing the fixed belt unit 31. It is configured to be movable. Accordingly, when the movable belt unit 32 is moved in the direction away from the fixed belt unit 31, the belt 54 can be separated from the belt 44. Further, when the movable belt unit 32 is moved in the direction approaching the fixed belt unit 31, the belt 54 can be brought into contact with the belt 44. In addition, since the mechanism for moving the movable belt unit 32 is the same as the past (for example, refer Unexamined-Japanese-Patent No. 2010-65354), detailed description is abbreviate | omitted here.

  In a state where the belt 54 is in contact with the belt 44, the belts 44 and 54 bend. At this time, as described above, the central portion of the portion between the drive pulley 41 and the driven pulley 42 of the belt 44 contacts the central portion of the portion between the drive pulley 51 and the driven pulley 52 of the belt 54 Therefore, the belt 44 bends evenly in the portion between the drive pulley 41 and the driven pulley 42, and the belt 54 bends evenly in the portion between the drive pulley 51 and the driven pulley 52.

  Further, in the present embodiment, as described above, the movable belt unit 32 moves the belt 54 in contact with the belt 44 by moving in the direction orthogonal to the opposing portions of the outer peripheral surfaces of the belts 44 and 54. The contact pressure in the width direction of the belts 44 and 54 can be made uniform.

  In the belt type false twist apparatus 24, when the yarn processing unit 12 is hooked in a state where the movable belt unit 32 is separated from the fixed belt unit 31 and the belt 54 is separated from the belt 44, FIG. As shown in (b), the yarn Y passes between the belt 44 and the belt 54, and the portion immediately downstream of the portion of the yarn Y passing between the belt 44 and the belt 54 is the edge disk 45. It will be in the state which contacted the outer edge part. In this state, the belts 44 are moved by moving the belts 44 by moving the motors 46, 55, and then the belt 54 is brought into contact with the belt 44 by bringing the movable belt unit 32 close to the fixed belt unit 31. Then, as shown in FIGS. 3A and 3B, the yarn Y is pinched between the belt 44 and the belt 54, and the belts 44 and 54 travel in this state. As a result, the yarn Y is twisted at a portion between the cross point C, which is a rhombus portion where the belt 44 and the belt 54 intersect, and the anti-twist guide 22. Also, the yarn Y is untwisted in the portion between the cross point C and the secondary feed roller 25. At this time, since the portion of the yarn Y located immediately downstream of the cross point C is in contact with the outer edge of the edge disc 45, the yarn Y is in the portion between the cross point C and the edge disc 45, Untwisting is suppressed and the untwisting start point is fixed on the edge disc 45.

  Here, if the untwisting start point of the yarn Y is within the cross point C, the untwisted yarn Y and the belts 44 and 54 may be rubbed, whereby fluff may be generated in the yarn Y. Further, at this time, the longer the untwisted yarn Y and the belts 44 and 54 rub, the longer the untwisting start point of the yarn Y is on the upstream side portion of the crosspoint C in the yarn path, Fuzz is likely to occur on the yarn Y. In the present embodiment, as described above, the untwisting of the yarn Y is suppressed in the portion between the cross point C and the edge disk 45, and the untwisting start point of the yarn Y is fixed on the edge disk 45. . Therefore, the start point of the untwisting of the yarn Y is shifted to the downstream side of the yarn path as compared with the case where the edge disk 45 is not provided. Thus, the untwisting start point of the yarn Y can be located downstream of the cross point C on the yarn path. Thereby, it is possible to suppress the generation of fluff on the untwisted yarn Y.

  Here, as described above, in order to bend the belt 44 evenly between the drive pulley 41 and the driven pulley 42 and to evenly bend the belt 54 between the drive pulley 51 and the driven pulley 52, as described above, Thus, it is preferable to bring the central portion of the portion between the drive pulley 41 and the driven pulley 42 of the belt 44 into contact with the central portion of the portion between the drive pulley 41 and the driven pulley 52 of the belt 54. On the other hand, in order to sufficiently suppress the untwisting of the yarn Y between the cross point C and the edge disc 45 and fix the untwisting start point on the edge disc 45, the cross point C and the edge disc 45 are It is preferable to be as close as possible. In the present embodiment, these conditions are satisfied by arranging the drive pulley 41 and the driven pulley 42, and the drive pulley 51 and the driven pulley 52 as close as possible.

  At this time, unlike the present invention, assuming that the fixed belt unit 31 does not have the belt extension pulley 43 and the belt 44 is wound around only the two pulleys 41 and 42, the drive pulley 41 If the drive pulley 42 and the driven pulley 42 are disposed close to each other, the length of the belt 44 becomes short. Similarly, assuming that the movable belt unit 32 does not have the belt extension pulley 53 and the belt 54 is wound around only the two pulleys 51 and 52, the drive pulley 51 and the driven pulley 52 If placed close, the length of the belt 54 becomes short.

  Here, if the length of the belt 44 is short, after one portion of the belt 44 contacts the belt 54, the time until this portion of the belt 44 next contacts the belt 54 becomes short. Therefore, each portion of the belt 44 reaches the cross point C and generates heat by friction with the yarn Y, then reaches the cross point C again and generates heat by friction with the yarn Y before it is sufficiently cooled. It will be As a result, the entire temperature of the belt 44 becomes high (for example, 100 ° C. or more), and the durability decreases.

Similarly, if the length of the belt 54 is short, after one portion of the belt 54 contacts the belt 44 , the time until this portion of the belt 54 next contacts the belt 44 becomes short. Therefore, each portion of the belt 54 reaches the cross point C and generates heat by friction with the yarn Y, and then reaches the cross point C again and generates heat by friction with the yarn Y before it is sufficiently cooled. It will be. As a result, the entire temperature of the belt 54 becomes high (for example, 100 ° C. or more), and the durability decreases.

  Further, at this time, since the frictional heat between the yarn Y and the belts 44 and 54 becomes larger as the thickness of the yarn Y becomes thicker, the possibility of the problem as described above becomes higher.

  Also, the belt 44 bends in the portion wound around the pulleys 41 to 43, but when the length of the belt 44 is short, when the belt 44 travels, each portion of the belt 44 reaches the pulleys 41 to 43 and bends The number of times it is done increases. As a result, breakage or peeling of the core material of the belt 44 tends to occur, and the durability of the belt 44 is reduced. Similarly, the belt 54 bends in the portions wound around the pulleys 51 to 53, but when the length of the belt 54 is short, the respective portions of the belt 54 reach the pulleys 51 to 53 when the belt 54 travels. The number of times it is bent increases. As a result, breakage or peeling of the core of the belt 54 easily occurs, and the durability of the belt 54 is reduced.

  On the other hand, in the present embodiment, in addition to the drive pulley 41 and the driven pulley 42, the fixed belt unit 31 has the belt extension pulley 43 disposed on the opposite side of the driven pulley 41 to the driven pulley 42. The belt 44 is wound around the pulleys 41 to 43. Thus, the length of the belt 44 can be increased as compared with the case where the belt 44 is wound around only the two pulleys 41 and 42. Similarly, in the present embodiment, the movable belt unit 32 has, in addition to the drive pulley 51 and the driven pulley 52, a belt extension pulley 53 disposed on the opposite side of the driven pulley 51 with respect to the driven pulley 52. The belt 54 is wound around the pulleys 51-53. Thus, the length of the belt 54 can be increased as compared with the case where the belt 54 is wound around only the two pulleys 51 and 52. Then, when the belts 44 and 54 are long, the portions of the belts 44 and 54 reach the cross point C and generate heat by friction with the yarn Y, and then they are sufficiently cooled and then cross point C again. And heat is generated by the friction with the yarn Y. Therefore, regardless of the thickness of the yarn Y, the temperature rise of the entire belts 44 and 54 can be suppressed, and the deterioration of the durability of the belts 44 and 54 can be prevented.

  In addition, when the length of the belt 44 increases, the number of times each portion of the belt 44 reaches the pulleys 41 to 43 and is bent when the belt 44 travels decreases. Therefore, the deterioration of the durability of the belt due to the breakage or peeling of the core material of the belt 44 can be suppressed. Similarly, when the length of the belt 54 increases, the number of times each portion of the belt 54 reaches the pulleys 51 to 53 and is bent when the belt 54 travels decreases. Therefore, the decrease in durability of the belt due to breakage or peeling of the core of the belt 54 can be suppressed.

Further, in the present embodiment, when twisting is applied to the yarn Y in the belt type false twist device 24, the shaft 73 (belt extension pulley 53) is moved to change the tension of the belt 54, The contact pressure between the belts 44 and 54 changes. Thereby, the force to send the yarn Y by the belts 44 and 54 and the force to apply twist to the yarn Y can be controlled according to the tension of the yarn Y or the like. At this time, as the tension of the belt 54 increases, the contact pressure between the belt 44 and the belt 54 increases, and the force of feeding the yarn by the belts 44 and 54 and the force of applying twist to the yarn increase.

  Here, unlike the present invention, instead of the shaft 73 (the central axis 53a of the belt extension pulley 53), the shaft 71 (the central axis 51a of the drive pulley 51) or the shaft 72 (the central axis 52a of the driven pulley 52) is moved. It is also conceivable to change the tension of the belt 54 by causing them to However, in this case, when the shaft 71 or 72 is moved, the contact portion of the belt 54 with the belt 44 may be inclined, and the adhesion between the belt 44 and the belt 54 may be reduced.

  More specifically, in the belt type false twist apparatus 24, the yarns Y are sandwiched between the belts 44 and 54, and the belts 44 and 54 are caused to travel to apply a force to the yarns Y, and the yarn Y Is applied to the downstream side of the yarn path while the yarn Y is twisted. At this time, in order to stabilize the force applied to the yarn Y, the contacting portions of the belts 44 and 54 need to be in close contact with each other. However, unlike the present invention, when the shaft 71 or 72 is moved, the moved shaft may be inclined, and the contact portion of the belt 54 with the belt 44 may be inclined. Then, when such a tilt occurs on the belt 54, the adhesion between the belt 44 and the belt 54 may be reduced.

  On the other hand, in the present embodiment, since the tension of the belt 54 is adjusted by moving the shaft 73 (belt extension pulley 53), even if the tension of the belt 54 is adjusted, the shaft 71 ( The positional relationship between the drive pulley 51) and the shaft 72 (follower pulley 52) is maintained. Therefore, when the tension of the belt 54 is adjusted, the contact portion of the belt 54 with the belt 44 does not tilt.

  Further, in the present embodiment, in order to prevent the contact portion of the belt 54 with the belt 44 from being inclined, the shafts 71 and 72 need to accurately maintain the state in which the axial directions are parallel to each other. is there. On the other hand, even if the shaft 73 is slightly inclined with respect to the shafts 71 and 72, the contact portion of the belt 54 with the belt 44 is not inclined. Therefore, the structure for supporting the shaft 73 and the structure for moving the shaft 73 do not require so high accuracy and can be simplified.

  Next, modified examples in which various modifications are added to the present embodiment will be described.

  In the above-described embodiment, the drive pulley 41 and the driven pulley 42 have the same diameter D1, and the drive pulley 51 and the driven pulley 52 have the same diameter D1, but the invention is limited thereto. Absent.

  In the first modification, as shown in FIG. 7A, in the fixed belt unit 31, the diameter of the drive pulley 41 is D2, which is the same as the diameter of the belt extension pulley 43. Similarly, as shown in FIG. 7B, in the movable belt unit 32, the diameter of the drive pulley 51 is D2, which is the same as the diameter of the belt extension pulley 53. Even in this case, since the belt 44 is bent at the driven pulley 42, the belt 44 is in close contact with the driven pulley 42. Further, since the belt 54 is bent at the driven pulley 52, the belt 54 is in close contact with the driven pulley 52. Thus, when the drive pulleys 41 and 51 are rotated to travel the belts 44 and 54, the driven pulleys 42 and 52 can be reliably rotated. Further, in the case of the first modification, since the diameters of the drive pulley 41 and the belt extension pulley 43 are the same D2, in the fixed belt unit 31, parts are shared by the drive pulley 41 and the belt extension pulley 43. can do. Similarly, since the diameters of the drive pulley 51 and the belt extension pulley 53 are the same D2, in the movable belt unit 32, the parts can be shared by the drive pulley 51 and the belt extension pulley 53.

In the first modification, the diameter of the drive pulleys 41 and 51 is D2 which is the same as the diameter of the belt extension pulleys 43 and 53, but the invention is not limited thereto. The diameter of the drive pulleys 41 and 51 may be smaller than the diameter D1 of the driven pulleys 42 and 52, and may be different from the diameter D2 of the belt extension pulleys 43 and 53. Even in this case, the belts 44 and 54 are in close contact with the driven pulleys 42 and 52 by being bent at the driven pulleys 42 and 52.

  In the above embodiment, the diameter of the belt extension pulley 43 is D2 smaller than the diameter D1 of the pulleys 41 and 42, and the diameter of the belt extension pulley 53 is larger than the diameter D1 of the pulleys 51 and 52. Although it was small D2, it is not restricted to this.

In the second modification, as shown in FIG. 8A, in the fixed belt unit 31, the diameter of the drive pulley 41 is D2 smaller than the diameter D1 of the driven pulley. Further, the diameter of the belt extension pulley 43 is D1 which is the same as the diameter of the driven pulley 42. Similarly, as shown in FIG. 8B, in the movable belt unit 32, the diameter of the drive pulley 51 is D2 smaller than the diameter D1 of the driven pulley 52. Further, the diameter of the belt extension pulley 53 is D1 which is the same as the diameter of the driven pulley 52. Even in this case, since the belt 44 is bent at the driven pulley 42, the belt 44 is in close contact with the driven pulley 42. Further, since the belt 54 is bent at the driven pulley 52, the belt 54 is in close contact with the driven pulley 52. Thus, when the drive pulleys 41 and 51 are rotated to travel the belts 44 and 54, the driven pulleys 42 and 52 can be reliably rotated. Further, in the case of the second modification, since the diameters of the driven pulley 42 and the belt extension pulley 43 are the same D1 , in the fixed belt unit 31, parts are shared by the driven pulley 42 and the belt extension pulley 43. can do. Similarly, since the diameters of the driven pulley 52 and the belt extension pulley 53 are the same D1 , the parts can be made common to the driven pulley 52 and the belt extension pulley 53 in the movable belt unit 32.

  Further, in the above-described embodiment and the first and second modifications, in the fixed belt unit 31, the diameter of one of the drive pulley 41 and the belt extension pulley 43 is equal to or less than the diameter D1 of the driven pulley 42, The diameter of the pulley is smaller than the diameter D1 of the driven pulley 42. Further, in the movable belt unit 32, the diameter of one of the drive pulley 51 and the belt extension pulley 53 is smaller than the diameter D1 of the driven pulley 52, and the diameter of the other pulley is larger than the diameter D1 of the driven pulley 52. small. However, it is not limited to this. For example, in the above-described embodiment, the diameter of the drive pulleys 41 and 51 may be larger than the diameter D1 of the driven pulleys 42 and 52 within the range in which the belts 44 and 54 are bent by the driven pulleys 42 and 52 .

  Moreover, in the above-mentioned embodiment and modification 1, although belts 44 and 54 were bent by driven pulleys 42 and 52 in two places, respectively, it is not restricted to this. In the third modification, as shown in FIG. 9A, in the fixed belt unit 31, the diameters of the pulleys 41 to 43 are all the same D1. Further, the central axis 42a of the driven pulley 42 is disposed on the movable belt unit 32 side with respect to a straight line L3 connecting the central axis 41a of the drive pulley 41 and the central axis 43a of the belt extension pulley 43. Further, as shown in FIG. 9B, in the movable belt unit 32, the diameters of the pulleys 51 to 53 are all the same D1. Further, the central axis 52a of the driven pulley 52 is disposed on the fixed belt unit 31 side with respect to a straight line L4 connecting the central axis 51a of the drive pulley 51 and the central axis 53a of the belt extension pulley 53.

  In this case, the belt 44 is in close contact with the driven pulley 42 by being bent by the driven pulley 42 only on the movable belt unit 32 side. Further, the belt 54 is in close contact with the driven pulley 52 by being bent by the driven pulley 52 only on the fixed belt unit 31 side. Therefore, even in this case, when the belts 44 and 54 travel, the driven pulleys 42 and 52 reliably rotate. Also, in this case, the belt 44 contacts the portion of the belt 54 between the drive pulley 51 and the portion bent by the driven pulley 52. Further, the belt 54 contacts a portion of the belt 44 between the drive pulley 41 and a portion bent by the driven pulley 42.

  Moreover, in the modification 3, although all the diameters of the pulleys 41-43 and the pulleys 51-53 were D1, it is not restricted to this.

  For example, in the fourth modification, as shown in FIGS. 10A and 10B, the diameter D2 of the pulley 43 is smaller than the diameter D1 of the pulleys 41 and 42, as in the above embodiment. The diameter D2 of the pulley 53 is smaller than the diameter D1 of the pulleys 51 and 52. Further, in the fifth modification, as shown in FIGS. 11A and 11B, the diameter D2 of the pulleys 41 and 43 is smaller than the diameter D1 of the pulley 42 as in the first modification. The diameter D2 of 53 is smaller than the diameter D1 of the pulley 52. Then, in the fourth and fifth modifications, as in the third modification, with respect to a straight line L3 connecting the central axis 42a of the driven pulley 42 to the central axis 43a of the drive pulley 41 and the central axis 43a of the belt extension pulley 43, It is disposed offset to the movable belt unit 32 side. Further, the central axis 52a of the driven pulley 52 is disposed on the fixed belt unit 31 side with respect to a straight line L4 connecting the central axis 51a of the drive pulley 51 and the central axis 53a of the belt extension pulley 53.

In the above-mentioned embodiment and modification 1, pulleys 41 to 43 are arranged such that central axes 41a to 43a are located on straight line L1, and the difference in diameter between pulleys 41 to 43 (difference between D1 and D2) Thus, the belt 44 is bent at the driven pulley 42. Similarly, pulleys 51-53 are arranged such that central axes 51a-53a are located on straight line L2, and belt 54 is driven pulley 52 by the difference in diameter of pulleys 51-53 (difference between D1 and D2). It is bent at. In this case, if the difference in diameter between the pulleys 41 to 43 is small, the belt 44 may not be sufficiently bent at the driven pulley 42. Similarly, when the difference in diameter between the pulleys 51 to 53 is small, the belt 54 may not be sufficiently bent at the driven pulley 52.

  On the other hand, in the fourth and fifth modifications, as described above, the central axis 42a of the driven pulley 42 is a straight line L3 connecting the central axis 41a of the drive pulley 41 and the central axis 43a of the belt extension pulley 43. It is arranged in a staggered manner. Further, the central axis 52a of the driven pulley 52 is disposed offset with respect to a straight line L4 connecting the central axis 51a of the drive pulley 51 and the central axis 53a of the belt extension pulley 53. Therefore, in the fourth and fifth modifications, the belt 44 is bent in the driven pulley 42 by both the difference in diameter of the pulleys 41 to 43 and the deviation of the central axis 42a from the straight line L3. Similarly, in the fourth and fifth modifications, the belt 54 is bent in the driven pulley 52 by both the difference in diameter of the pulleys 51 to 53 and the deviation of the central axis 52a from the straight line L4. Thus, the belts 44 and 54 can be reliably bent at the driven pulleys 42 and 52.

In the fourth and fifth modifications, the belt 44 is in contact with the driven pulley 42 on both the movable belt unit 32 side and the opposite side, but the present invention is not limited thereto. The belt 44 may be in contact with the driven pulley 42 only on the movable belt unit 32 side. In the fourth and fifth modifications, the belt 54 is in contact with the driven pulley 52 on both the fixed belt unit 31 side and the opposite side, but the present invention is not limited thereto. The belt 54 may be in contact with the driven pulley 52 only on the fixed belt unit 31 side.

  Further, as long as the belt 44 is in a range where it is bent by the driven pulley 42 on the movable belt unit 32 side, the size relationship of the diameters of the pulleys 41 to 43 may be a relationship other than the third to fifth modifications. Similarly, as long as the belt 54 is in a range where it is bent by the driven pulley 52 on the fixed belt unit 31 side, the size relationship of the diameters of the pulleys 51 to 53 may be in a relationship other than the third to fifth modifications.

  In the above-described embodiment, the belts 44 and 54 are bent by the driven pulleys 42 and 52 regardless of whether the belts 44 and 54 are in contact with each other. However, the present invention is not limited to this.

  In the sixth modification, as shown in FIG. 12A, in the fixed belt unit 31, the diameters of the pulleys 41 to 43 are all the same D1, and the central axes 41a to 43a of the pulleys 41 to 43 are the same straight line L1. Located on the top. Similarly, as shown in FIG. 12B, in the movable belt unit 32, the diameters of the pulleys 51 to 53 are all the same D1, and the central axes 51a to 53a of the pulleys 51 to 53 are on the same straight line L2. positioned.

In this case, the belts 44 and 54 are not bent at the driven pulleys 42 and 52 when the belt 44 and the belt 54 are not in contact with each other. Therefore, the belts 44, 54 are not in close contact with the driven pulleys 42, 52. Therefore, when the belts 44 and 54 are run, the driven pulleys 42 and 52 may not rotate together.

  However, even in this case, if the contact pressure between the belts 44 and 54 is large to some extent in the state where the belts 44 and 54 are in contact with each other, the belts 44 and 54 are bent at the driven pulleys 42 and 52. Close contact with 52. Therefore, when the belts 44, 54 are caused to travel, the driven pulleys 42, 52 rotate together.

  In the above-described embodiment, the belt type false twisting device 24 moves the movable belt unit 32 in the direction perpendicular to the opposing portions of the outer peripheral surfaces of the belts 44 and 54 with respect to the fixed belt unit 31. Thus, the belt 54 can be moved between the position in contact with the belt 44 and the position away from the belt 44, but is not limited thereto. In the seventh modification, as shown by arrow G in FIG. 13, the position at which the belt 54 contacts the belt 44 with respect to the central axis 51 a of the drive pulley 51 (the position shown by the solid line in FIG. 13) And the position where the belt 54 is separated from the belt 44 (the position shown by the alternate long and short dash line in FIG. 13). The mechanism for swinging the movable belt unit 32 is, for example, the same as the conventional one (see, for example, Japanese Patent Application Laid-Open No. 10-8335), and thus the detailed description is omitted here.

  However, in the seventh modification, the contact pressure between the belt 44 and the belt 54 causes variations in the width direction of the belt 44 as compared with the case of the above-described embodiment. Specifically, the contact pressure between the belt 44 and the belt 54 increases as the portion closer to the central axis 51 a in the width direction of the belt 44.

In the above embodiment, the bending angle θ of the belts 44, 54 by the driven pulleys 42, 52 is 0. 0 when the belts 44 of the two belt units 31, 32 and the belt 54 are not in contact with each other. Although it was five degrees or more, it is not restricted to this. The bending angle θ of the belts 44, 54 by the driven pulleys 42, 52 may be less than 0.5 degrees.

  Further, in the above-described embodiment, the edge disk 45 is provided on the drive pulley 41 of the fixed belt unit 31, but the edge disk 45 may be provided on the drive pulley 51 of the movable belt unit 32.

  Moreover, in the above-mentioned embodiment, although the drive pulley 41 and the driven pulley 42 of the fixed belt unit 31 were pulleys of the same diameter, the diameter of the drive pulley 41 and the diameter of the driven pulley 42 are completely the same. It is not limited to being there. The difference between the diameter of the drive pulley 41 and the diameter of the driven pulley 42 is such that the diameters of these pulleys can be regarded as substantially the same diameter (for example, 1% or less of any diameter of the pulleys 41 and 42) There may be a difference). The same applies to the drive pulley 51 and the driven pulley 52 of the movable belt unit 32 of the above-described embodiment, and to the pulleys of the same diameter that constitute the respective belt units in the above-described modification.

  Further, in the above-described embodiment, the positional relationship between the shafts 61 to 63 is fixed in the fixed belt unit 31, and the positional relationship between the shafts 71 and 72 is fixed in the movable belt unit 32, and the shafts Although 73 was movable with respect to the shafts 71 and 72 in the direction parallel to the straight line L2, it is not limited thereto.

  For example, in the movable belt unit 32, the shaft 73 can be moved relative to the shafts 71 and 72 in a direction inclined with respect to the straight line connecting the central axis 51a and the central axis 52a. Good. Moreover, it is not restricted to moving the shaft 73 linearly. For example, the shaft 73 may be moved to swing the shaft 73 about a predetermined swing axis, or the shaft 73 may be moved to tilt the shaft 73 with respect to the shafts 71 and 72.

  In addition to the fact that the shaft 73 is movable relative to the shafts 71 and 72 in the movable belt unit 32, the shaft 63 is also movable relative to the shafts 62 and 63 in the fixed belt unit 31. May be configured.

  Alternatively, contrary to the above embodiment, in the fixed belt unit 31, the positional relationship between the shafts 61 and 62 is fixed, and the shaft 63 is movable relative to the shafts 61 and 62. In the movable belt unit 32, the positional relationship between the shafts 71 to 73 may be fixed.

Furthermore, in the fixed belt unit 31, the positional relationship between the shafts 61 to 63 may be fixed, and in the movable belt unit 32, the positional relationship between the shafts 71 to 73 may be fixed. In this case, for example, when twisting the yarn Y with the belt type false twist device 24, the movable belt unit 32 is moved in the direction orthogonal to the contact surface between the belt 44 and the belt 54. The contact pressure between the belt 44 and the belt 54 is adjusted. Thus, it is possible to control the force for feeding the yarn Y and the force for applying twist to the yarn Y.

  Further, in the above-described embodiment, in addition to moving the shaft 73 to adjust the tension of the belt 54, moving the movable belt unit 32 imparts twisting force to the yarn Y and yarn Y. You may control the force. In this case, the moving amount of the movable belt unit 32 is reduced as compared with the case of controlling the force to feed the yarn Y and the force to apply twist to the yarn Y only by moving the movable belt unit 32. Can.

24 belt type false twisting device 31 fixed belt unit 32 movable belt unit 41, 51 drive pulley 42, 52 driven pulley 43, 53 pulley for belt extension 41a, 42a, 43a, 51a, 52a, 53a central shaft 44, 54 belt 45 edge Disc 76 cylinder

Claims (7)

It comprises two belt units each having an endless belt, and a drive pulley and a driven pulley on which the belt is wound,
The belts of the two belt units are arranged to intersect at a central portion of a portion between the drive pulley and the driven pulley;
A belt type false twisting apparatus which performs false twist processing on yarn by running the belt in a state in which the yarn is sandwiched between portions of the belts of the two belt units that intersect each other,
One of the two belt units is
By being provided on the drive pulley, it rotates with the drive pulley and contacts the downstream portion of the yarn path with respect to the portion of the yarn pinched by the belt, thereby suppressing yarn untwisting and starting the untwisting point Further comprising an untwisting point fixing member for fixing the
The two belt units are respectively
A belt type false twist apparatus further comprising a belt extension pulley disposed on the opposite side of the driven pulley to the driven pulley and on which the belt is hung. The driven pulley bends the belt in any state among the state in which the belts of the two belt units are in contact with each other and the state in which the belts of the two belt units are not in contact with each other. Let
The belt type false twist according to claim 1, wherein the belts of the two belt units intersect at a central portion of a portion between the drive pulley and a portion bent to the driven pulley. apparatus.   The belt type false twist according to claim 2, wherein a bending angle of the belt by the driven pulley in a state where the belts of the two belt units are not in contact with each other is 0.5 degrees or more. apparatus. The diameter of the drive pulley is the same as the diameter of the driven pulley or smaller than the diameter of the driven pulley,
The belt type false twist apparatus according to claim 2 or 3, wherein a diameter of the belt extension pulley is smaller than a diameter of the driven pulley. The drive pulley, the driven pulley and viewed from the axial Direction of the belt extension pulleys, the shaft of the driven pulley, two of the belt shaft and the line connecting the axis of the belt extension pulley of said drive pulley The belt type false twisting apparatus according to claim 4, wherein the belts of the unit are disposed on the side where the belts cross each other. The diameter of the drive pulley, the diameter of the driven pulley, and the diameter of the belt extension pulley are the same.
Said drive pulley, as viewed from the axis Direction of the driven pulley and the belt extension pulley, the axis of the driven pulley, is arranged offset from a straight line passing through the axis of said extension pulley and the axis of the drive pulley The belt type false twist apparatus according to claim 2 or 3, characterized in that: In at least one belt unit of the two belt units,
The shaft of the drive pulley and the shaft of the driven pulley are fixed to each other,
An axis of the belt extension pulley is configured to be movable with respect to an axis of the drive pulley and an axis of the driven pulley;
The belt type according to any one of claims 1 to 6, further comprising a moving device for moving the shaft of the belt extension pulley relative to the shaft of the drive pulley and the shaft of the driven pulley. False twist device.

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