JP4201788B2 - Synthetic yarn bundling method and bundling apparatus - Google Patents

Description

  The present invention relates to a synthetic yarn bundling method and bundling apparatus for wrapping synthetic yarn such as hollow fiber with a protective sheet to form a yarn bundle (bundle), and in particular, a hollow fiber bundle used for a blood purifier or the like. Suitable for manufacturing.

A hollow fiber blood purifier is generally configured by filling a cylindrical casing with 5000 to 12000 hollow fibers as a filtration membrane.
A hollow fiber which is a synthetic yarn is produced by extruding a polymer material dissolved with a solvent or the like from a die, and the maximum number of hollow fibers spun from one die is 100 to 200. . Therefore, it is necessary to form a bundle having a predetermined number of 5000 to 12000 by some method.

As shown in FIG. 3, the conventional general method for bundling the spun hollow fibers is to wind up the hollow fibers 2 spun into a polygonal cassette 1 such as a hexagon several times until a predetermined number is reached, A protective sheet is wound around the straight portion of the wound hollow fiber, and then both end portions (portions shown by a one-dot chain line in FIG. 4) are cut into a yarn bundle.
Japanese Patent Publication No.58-30057

  However, in the conventional method in which only the straight portion is cut and used after being wound around the polygonal cassette 1 several times, the remaining yarn in the corner portion 3 is wasted. Therefore, the yield cannot be increased.

  Further, when winding around the cassette 1, it is necessary to wind the yarn while applying a certain amount of tension in order to wind it without being disturbed. For this reason, the weak yarn may be damaged by this tension such as thinning of the yarn or occurrence of fine cracks, and the yarn inside the cassette 1 may be crushed by the winding pressure.

  Furthermore, the work of winding the yarn around the polygonal cassette 1 and then covering the both ends with a protective sheet is delicate and complicated, and is difficult to be automated by a machine. Therefore, labor saving and rationalization cannot be achieved.

  Therefore, an object of the present invention is to provide a synthetic yarn bundling method and bundling device that can eliminate damage to the yarn, can be automated, and can improve the yield.

The present invention has been proposed to achieve the above object, and the bundling method according to claim 1 is a bundle of synthetic yarns produced by wrapping a bundle of yarns having a length corresponding to the use with a protective sheet. A method of
A yarn unwinding step of sandwiching the tip portion of the spun synthetic yarn and unwinding in the lateral direction according to the spinning speed of the synthetic yarn;
A fed yarn cutting step for cutting the middle of the fed synthetic yarn at a predetermined length from the tip;
A yarn accumulating step of accumulating the synthetic yarn by lowering the synthetic yarn cut in the feeding yarn cutting step a plurality of times on the thread accumulating member having a cross-sectional groove shape having an open upper surface;
The integrated synthetic yarn is placed on a protective sheet, and in this state, the sheet winding step of passing through the inside of the sheet-winding cylindrical material gradually reducing the diameter from the inlet side to the outlet side, and wrapping the synthetic yarn with the protective sheet,
In the vicinity of the exit of the sheet-rolling tube material, the side edge portions of the protective sheet wrapped around the synthetic yarn are fastened together, and the sheet fastening step to make the synthetic yarn into a long yarn bundle,
A yarn bundle cutting step of cutting a long yarn bundle wrapped with a protective sheet into a length corresponding to the application.

The bundling device according to claim 2 comprises:
A yarn unwinding mechanism that sandwiches the tip of the spun synthetic yarn and unwinds in the lateral direction according to the spinning speed of the synthetic yarn;
A feed yarn cutting mechanism that cuts the middle of the fed synthetic yarn at a predetermined length from the tip;
Yarn accumulation that has an accumulation groove with the upper surface open, and is placed at a position where the synthetic yarn cut by the feed yarn cutting mechanism descends, and receives the cut synthetic yarn multiple times and accumulates the synthetic yarn in the accumulation groove A member,
A sheet wound tubular material that gradually decreases in diameter from the inlet side to the outlet side, and passes through the inside of the sheet wound tubular material with the synthetic yarn accumulated by the yarn accumulating member placed on the protective sheet. A sheet winding mechanism for winding and wrapping;
A sheet fastening mechanism that is disposed in the vicinity of the exit of the sheet winding cylindrical material, and that fastens the side edge portions of the protective sheet wrapped around the synthetic yarn by the sheet winding mechanism ;
A thread bundle cutting mechanism for cutting a long thread bundle wrapped with a protective sheet into a length according to the application;
It is provided with.

  As described above, according to the present invention, it is not necessary to wind up around a polygonal cassette, and a predetermined number of the synthetic yarns spun from the spinning device can be accumulated without bending. Can be reduced. Therefore, the yield can be increased as compared with the conventional case.

  Moreover, since it does not wind up to a casket, it is not necessary to apply winding tension to a synthetic yarn. Therefore, even when a weak synthetic yarn is bundled, the yarn is hardly damaged, and the quality of the bundled synthetic yarn can be improved.

  Furthermore, it becomes easy to mechanize when wrapping synthetic yarn with a protective sheet, contributing to rationalization and labor saving by automation.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a schematic configuration of a hollow fiber bundling device which is a typical synthetic yarn, and FIG. 2 is a schematic front view thereof.

  As shown in FIGS. 1 and 2, this bundling device is installed next to a spinning device (not shown but on the left side in FIG. 2), and holds the tip portion of the hollow fiber 11 spun by the spinning device. Then, the yarn feeding mechanism 12 that feeds out in the horizontal direction, the feeding yarn cutting mechanism 13 that cuts the middle of the fed hollow fiber 11 from the tip to a predetermined length, and the yarn that accumulates the hollow fibers 11 cut into the predetermined length. An accumulation member 14, a sheet winding mechanism 16 for wrapping the accumulated hollow fiber 11 with a protective sheet 15, a sheet fastening mechanism 17 for fastening side edge portions of the protective sheet 15, and a length wrapped with the protective sheet 15 The main component mechanism is a yarn bundle cutting mechanism 18 that cuts a long hollow fiber bundle into a length corresponding to the application, and each of these mechanisms is horizontally installed above the lower frame 19 or the lower frame 19 installed on the floor surface. Erected in the direction It is installed directly or through a member of the gantry and bracket or the like to the upper frame 20.

  The yarn feeding mechanism 12 includes a pinching member 21 that runs in the horizontal direction while pinching the tip portion of the spun hollow fiber 11, a guide member that guides the pinching member 21 in the horizontal direction, and the pinching member 21 as a guide member. The above-mentioned mechanism is provided in two sets so that the hollow fibers 11 continuously spun can be alternately sandwiched and continuously fed out.

  As shown in FIG. 2, the guide member is composed of long guide rails 22 fixed to the left and right side surfaces of the upper frame 20 made of a square pipe, and slidably supports the sliders 23 of the clamping member 21. is doing.

  The clamping member 21 includes a slider 23 that travels along the guide rail 22, and a clamp portion 25 that has a claw piece shape that opens and closes by driving a drive source 24 such as a solenoid at the tip end of the slider 23 that is fixed to the slider 23. Have. In this embodiment, since the synthetic yarn pass line is set below the upper frame 20, the clamping members 21 and 21 that respectively run on the left and right sides of the upper frame 20 pass through the clamp portions 25 and 25, respectively. It is mounted facing each other so as to face the line side.

  In addition, the clamping member 25 is moved forward and backward with respect to the pass line by a driving source 26 such as an air cylinder or a solenoid so that even if the synthetic yarn is held and conveyed along the pass line, the holding member 21 does not interfere with each other. It is configured to be able to move.

  As shown in FIG. 2, the driving mechanism for driving the holding member 21 having such a configuration along the guide rail 22 is provided with a male screw rod 27 on bearings 28 and 28 on the upper frame 20 along the longitudinal direction thereof. The motor 30 is provided in a state of being rotatably supported by the screw 30, and the ball spline 29 above the clamping member 21 is screwed into the male screw rod 27 to control the rotation direction, rotation angle, and rotation speed of a servo motor, a pulse motor, or the like. Is connected to the end of the male screw rod 27. Therefore, when the male screw rod 27 is rotated by driving the motor 30, the clamping member 21 is moved in the horizontal direction along the guide rail 22, and the rotation direction and the rotation angle of the motor 30 are controlled to control the clamping member 21. It is possible to control the movement range (stroke indicated by the arrow in FIG. 1, i.e., yarn feed length), stop position, and the like.

  This drive mechanism is provided for each clamping member 21 and is configured such that each clamping member 21 can travel independently at a predetermined timing. In addition, this drive mechanism advances at a speed similar to the spinning speed and stops when the clamping member 21 moves forward from the clamping position close to the spinning device side to the stop position (falling position) on the opposite side. When retracting from the position toward the clamping position, it is desirable to retract at a speed faster than the forward speed. However, as will be described later, when the pinching member 21 moves backward and pinches the hollow fiber 11 at the pinching position, the yarn feeding is temporarily stopped, and the hollow fiber 11 spun during this stop is sent to the lifting roller 31. Since it is slackened by descent and held, while the holding member 21 travels forward again, the retained hollow fiber 11 is added and fed out. Therefore, the forward speed (from the spinning speed of the spinning device) is sufficient to feed this reserved part. Also set to a slightly faster speed).

  In the present embodiment, the feed yarn cutting mechanism 13 is provided with an air cylinder 35 downward as a drive source in the upper frame 20, and a cutter 36 is attached to the tip of the rod of the air cylinder 35. Therefore, when the cutter 36 is lowered by driving the air cylinder 35, the hollow fiber 11 passing through the pass line can be cut.

  The feed yarn cutting mechanism 13 may have any configuration as long as it can cut the hollow fiber, for example, a rotary cutter.

  In the yarn feeding mechanism 12 having the above-described configuration, as shown on the left side in FIG. 2, when one clamping member 21 retracts to the clamping position with the clamp portion 25 opened, 25 advances to the pass line side and closes. Therefore, the tip portion of the hollow fiber 11 spun from the spinning device arranged on the left side in FIG. 2 is pinched by the pinching member 21, and moves forward toward the stop position at a speed according to the spinning speed by the forward movement of the pinching member 21. The yarn is fed in the direction (yarn feeding step).

  Then, when the clamping member 21 reaches the stop position, the other clamping member 21 is retracted to the clamping position, and the clamp portion 25 is advanced and closed in the same manner as described above, and the middle of the hollow fiber 11 is passed. Hold it.

  In this way, when the other clamping member 21 clamps the middle of the hollow fiber 11, the other clamping member 21 also stops at the stop position and temporarily stops feeding, during which the thread cutting mechanism 13 moves halfway through the hollow fiber 11. Disconnect. The stop position is separated from the position where the yarn cutting mechanism 13 cuts the middle of the hollow fiber 11 by a predetermined distance. Therefore, the cut hollow fiber 11 is cut at a predetermined length from the tip (feeding yarn cutting step).

  When the feeding yarn cutting step is completed, one clamping member 21 opens the clamp portion 25 to release the tip portion of the hollow fiber 11. Therefore, the hollow fiber 11 cut to a predetermined length descends toward the accumulation groove of the yarn accumulation member 14 by its own weight.

  Further, since the yarn cutting position is set in front of the pinching position (position advanced in the feeding direction), the other pinching member 21 is separated even if the cut rear end portion of the cut hollow fiber 11 is separated. Thus, it is possible to continue to hold the tip portion of the hollow fiber 11 fed from the spinning device. Therefore, when the other holding member 21 travels forward after the delivery yarn cutting step is completed, the tip portion of the hollow fiber 11 delivered from the spinning device can be delivered toward the stop position.

  In this way, when both the clamping members 21 reciprocate alternately, the hollow fiber 11 fed from the spinning device can be repeatedly fed a predetermined number of times, and the fed hollow fiber 11 can be fed to a predetermined length by the yarn cutting mechanism. Can be cut into pieces.

  Next, the yarn accumulating member 14 for accumulating the hollow fibers 11 cut to a predetermined length and the yarn accumulating step will be described.

  The yarn accumulating member 14 according to the present embodiment is a rain gutter-shaped tray having an accumulation groove 40 having a substantially U-shaped cross-section with an open upper surface, and the hollow yarn cut by the feeding yarn cutting mechanism 13 is lowered to a position. Be placed. Then, in order to move the hollow fiber 11 accumulated in the accumulation groove 40 to the next sheet winding step, in this embodiment, as shown in FIG. 2, the outer periphery of the turret 41 that rotates by a predetermined angle (120 degrees), etc. Installed at intervals (120 degree intervals), the accumulation position where the accumulation grooves 40 face upward, the accumulation yarn discharge position where the accumulation grooves 40 face obliquely downward by changing the 120 degree phase, and the standby where the phase is further changed by 120 degrees It is configured to be able to stop at the position. The turret 41 is supported at both ends by bearings, and rotates intermittently by a predetermined rotation angle (120 degrees) at a predetermined timing by driving the servo motor 42.

  Further, above the yarn accumulating member 14 at the accumulating position, there is provided a fall-down-shaped yarn descending guide 43 for guiding the falling hollow fiber 11 into the accumulating groove 40.

  Accordingly, when the yarn feeding mechanism 12 feeds the hollow fiber 11 from the spinning device and the hollow fiber 11 is cut into a predetermined length by the yarn cutting mechanism 13, the cut hollow fiber 11 is lowered while being guided by the yarn lowering guide 43. Then, it is stored in the accumulation groove 40 of the yarn accumulation member 14. In this way, when the yarn accumulating member 14 receives the cut yarn a plurality of times, the hollow fibers 11 can be accumulated up to a predetermined number by appropriately setting the number of acceptance (yarn accumulating step). . For example, when spinning by a spinning device equipped with a spinneret for spinning 200 hollow fibers 11 to make a bundle of 10,000 yarns, the yarn is accepted 50 times.

  When the predetermined number of hollow fibers 11 are accumulated in the accumulation groove 40, the turret 41 rotates, so that the yarn accumulation member 14 that has completed the yarn accumulation process moves to the accumulation yarn discharge position, and the hollow fibers 11 in the accumulation groove 40 are moved. The empty yarn stacking member 14 that has been dropped onto the protective sheet 15 and has been waiting at the standby position moves to the stacking position and stops.

Next, the sheet winding mechanism 16 and the sheet winding process will be described.
The sheet winding mechanism 16 includes a stand 45 that supports the sheet coil 15 ′, and a protective sheet 15 that is disposed along the longitudinal direction of the yarn accumulating member 14 obliquely below the accumulated yarn discharging position and unwound from the coil 15 ′. A table 46 to be laid, a sheet winding cylinder 47 disposed at the tip of the table 46, a feeding device 48 disposed on the outlet side of the sheet winding cylinder 47, and the like.

  The sheet winding tubular material 47 is a tubular material having a large inner diameter on the inlet side and a tapered portion that gradually decreases in diameter on the outlet side. When the protective sheet 15 is passed from the large inlet toward the small outlet, By the inner peripheral surface, the left and right side edge portions of the flat protective sheet 15 are gradually wound into an arc shape, and are gradually wound from a shallow bowl shape into a deep bowl shape, and finally a cylindrical shape having the same diameter as the inner diameter of the outlet Can be wound on. In order to overlap both side edge portions of the protective sheet 15, in the vicinity where both side edge portions abut, the curvature of one inner peripheral surface is made larger than the curvature of the other, and one side edge portion is lowered. In addition, it is desirable that the other side edge portion overlaps therewith.

  The feeding device 48 intermittently grips and pulls out the protective sheet 15 from the sheet-rolled tubular material 47, and opens and closes the chucks 51 and 51 by driving a driving source such as an air cylinder or solenoid, and the chuck 51. It consists of a rail 52 and a drive source 53 that reciprocate along the feed direction. The left and right chucks 51, 51 are closed near the exit of the sheet winding cylinder 47 to clamp the hollow fiber bundle, and advance in this clamped state to move the hollow fiber bundle together with the protective sheet 15 from the sheet winding cylinder 47. Withdraw and advance by a predetermined stroke, it opens and releases the hollow fiber bundle at that position. Then, after retreating in the open state, it is closed to complete one cycle. Therefore, when this cycle is repeated, the hollow fiber bundle can be intermittently sent together with the protective sheet 15 by the stroke length.

  In the present embodiment, the sheet fixing mechanism 17 is provided in the vicinity of the outlet of the sheet winding tubular material 47. The sheet fastening mechanism 17 fastens the side edge portions of the protective sheet 15 wrapped around the hollow fiber bundle by the sheet winding mechanism 16. In the embodiment shown in the drawings, a driving source such as an air cylinder or a solenoid is used. A rod-shaped heater head 56 that moves up and down by driving 55 is disposed in the vicinity of the outlet of the sheet-rolling tubular material 47. In addition, the heater head 56 is arrange | positioned downward so that the both-sides edge part of the protection sheet 15 may contact the approximate center of the overlapped part.

  In the sheet winding mechanism 16 having the above-described configuration, when the yarn accumulating member 14 is moved from the accumulating position to the accumulated yarn discharging position, the hollow fibers 11 in the accumulating groove 40 are discharged onto the protective sheet 15. The hollow fiber 11 advances together with the protective sheet 15 while being placed on the protective sheet 15 every time the feeding device 48 grips and sends the front portion of the protective sheet 15. When the protective sheet 15 moves forward, it passes through the inside of the sheet wound tubular material 47 from the front portion, so that the hollow fiber bundle is gradually wrapped by the protective sheet 15 formed into a tubular shape, and the sheet wound tubular material 47 When passing through, it is securely wrapped from both sides (sheet winding process).

  When the hollow fiber 11 wrapped around the protective sheet 15 is pulled out from the outlet of the sheet winding tubular material 47, the heater head 56 descends, and the portion where the side edges of the protective sheet 15 overlap is spot welded and stopped. Wear (sheet fastening process). Therefore, the hollow fiber bundle becomes a long hollow fiber bundle wrapped around the protective sheet 15. In addition, it is desirable that the protective sheet 15 is fixed by the minimum necessary point welding so that the protective sheet 15 can be easily removed after the hollow fiber bundle is filled in the case of the blood purifier.

  If a hollow fiber bundle having a predetermined length of hollow fiber 11 wrapped with a protective sheet 15 is formed, in this embodiment, it is cut into a single long hollow fiber bundle. For this reason, the cutting device 60 is arranged on the downstream side of the feeding device 48. This cutting device 60 is provided with a cutter 62 rotated by a motor 61 so as to be movable up and down. Therefore, when the rear end of the hollow fiber 11 having a predetermined length arrives at the cutting position, the cutting device 60 is activated, and the protective sheet 15 is placed between the rear end of the previous hollow fiber bundle and the front end of the subsequent hollow fiber bundle. Cut at the empty part between. This cutting position can be calculated and set in advance by setting the set length of the hollow fiber 11 and the feed amount of the feed device 48.

  The hollow fiber bundle cut by the cutting device 60 is sent to the next yarn bundle cutting step by a transport mechanism such as a chute or a transport robot, and is cut to a predetermined length according to the application.

Next, the yarn bundle cutting mechanism 18 and the yarn bundle cutting process will be described.
The yarn bundle cutting mechanism 18 includes a feeding device that feeds a hollow fiber bundle, a blade 67 that is cut by a driving source 66 such as an air cylinder or a solenoid, and a feeding device (not shown). The feeding device has the same configuration as the feeding device.

  When a single long hollow fiber bundle is conveyed from the sheet fixing process by the conveyance mechanism, the chuck grasps the tip of the hollow fiber bundle and is initially clamped by the clamping member 21 of the yarn feeding mechanism 12. The tip portion is sent to a cutting position (blade position), where the blade 67 is lowered and cut, and the uneven portion of the cut tip is cut off. Next, the hollow fiber bundle is fed forward from the cutting position by a predetermined length (the length of the final bundle, for example, 200 mm to 400 mm) by the operation of the feeding device, and the blade 67 is lowered and cut here. (Thread bundle cutting step).

  Thus, the hollow fiber bundle (bundle) cut | disconnected by the predetermined length rolls on the chute | shoot (not shown) arrange | positioned below, and is accommodated in a container. When the above-described cutting is repeated, one long hollow fiber bundle is cut into bundles having a predetermined length suitable for the application. In addition, since the rear end irregular part of a long hollow fiber bundle is also clamped by the clamping member 21, it is desirable to cut and discard.

  The yarn feeding mechanism 12 according to the present invention may have any configuration as long as the tip portion of the spun hollow fiber 11 can be pinched and fed in the lateral direction. And the clamping member 21 which clamps the hollow fiber 11 is not limited to the said embodiment.

Further, the feed yarn cutting mechanism 13 that cuts the midway of the fed hollow fiber at a predetermined length from the tip thereof is capable of cutting the hollow fiber 11 even if it is pressed with a blade, or a device that swings the blade, Further, it may be rotated, or may be melted by irradiation with a laser beam or heating with a heater. Furthermore, the attachment position of the yarn cutting mechanism 13 is not limited to the frame, and may be attached to the clamping member 21 of the yarn feeding mechanism 12.
Similarly, if the yarn bundle cutting mechanism 18 can cut the yarn bundle to a length corresponding to the application, even if it is a mechanical cutting mechanism such as a rotary cutter type, it is a fusing cutting mechanism such as a laser beam irradiation type. Also good.

  Furthermore, the yarn accumulating member 14 may have any configuration as long as it has an accumulating groove 40 for accumulating the descending hollow fiber 11, and the accumulating groove 40 can receive the hollow fiber 11 and accumulate a predetermined number thereof. What is necessary is just an empty part, and the groove | channel inner surface may be discontinuous.

  Further, the mechanism for moving the yarn accumulating member 14 to the hollow fiber lowering position is not limited to the rotary type of the above embodiment. Then, it suffices if a predetermined number of synthetic yarns can be received and accumulated in the accumulation groove 40 of the yarn accumulation member 14, and the hollow fiber 11 may be lowered by free fall as shown in the above embodiment, or It may be lowered while being mechanically controlled.

  In the above-described embodiments, the hollow fiber 11 has been described as a synthetic yarn. However, the present invention is not limited to the hollow fiber 11 and may be used for fishing lines and other solid synthetic yarns. it can.

It is a perspective view which shows schematic structure of the bundling device of a hollow fiber. It is a schematic front view of a bundling device. It is a front view of the conventional hexagonal cassette which winds up a hollow fiber until it becomes a predetermined number. It is a partially broken front view of a hollow fiber bundle showing a cutting position of a hollow fiber wound up with a hexagonal cassette.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hexagonal casket 2 Hollow fiber 3 Corner part 11 Hollow fiber 12 Thread feeding mechanism 13 Thread feeding mechanism 13 Thread collecting member 15 Protective sheet 16 Sheet winding mechanism 17 Sheet fastening mechanism 18 Thread bundle cutting mechanism 19 Lower frame 20 Upper frame 21 Clamping member 22 Guide rail 23 Slider 24 Clamp unit drive source 25 Clamp unit 26 Drive source 27 Male screw rod 28 Bearing 30 Motor 31 Lift roller 35 Air cylinder 36 Cutter 40 Accumulated groove 41 Turret 42 Servo motor 43 Yarn lowering guide 45 Stand 46 Table 47 Sheet wound cylindrical material 48 Feeder 51 Chuck 52 Rail 53 Drive source 55 Heater head vertical drive source 56 Heater head 60 Cutting device 61 Motor 62 Cutter 66 Drive source 67 Blade

Claims (2)

A synthetic yarn bundling method for producing a bundle of yarns of a length according to the use, wrapped in a protective sheet,
A yarn unwinding step of sandwiching the tip portion of the spun synthetic yarn and unwinding in the lateral direction according to the spinning speed of the synthetic yarn;
A fed yarn cutting step for cutting the middle of the fed synthetic yarn at a predetermined length from the tip;
A yarn accumulating step of accumulating the synthetic yarn by lowering the synthetic yarn cut in the feeding yarn cutting step a plurality of times on the thread accumulating member having a cross-sectional groove shape having an open upper surface;
The integrated synthetic yarn is placed on the protective sheet, and in this state, the sheet winding step of wrapping the synthetic yarn with the protective sheet , passing through the inside of the sheet winding tubular member gradually reducing the diameter from the inlet side to the outlet side ,
In the vicinity of the exit of the sheet winding tube material, the side edge portions of the protective sheet wrapped around the synthetic yarn are fastened to each other, and the sheet fastening step to make the synthetic yarn into a long yarn bundle,
A synthetic yarn bundling method comprising: a yarn bundle cutting step of cutting a long yarn bundle wrapped with a protective sheet into a length corresponding to a use. A yarn unwinding mechanism that sandwiches the tip of the spun synthetic yarn and unwinds in the lateral direction according to the spinning speed of the synthetic yarn;
A feed yarn cutting mechanism that cuts the middle of the fed synthetic yarn at a predetermined length from the tip;
Yarn accumulation that has an accumulation groove with the upper surface open, and is placed at a position where the synthetic yarn cut by the feed yarn cutting mechanism descends, and receives the cut synthetic yarn multiple times and accumulates the synthetic yarn in the accumulation groove A member,
A sheet wound tubular material that gradually decreases in diameter from the inlet side to the outlet side, and passes through the inside of the sheet wound tubular material with the synthetic yarn accumulated by the yarn accumulating member placed on the protective sheet. A sheet winding mechanism for winding and wrapping;
A sheet fastening mechanism that is disposed in the vicinity of the exit of the sheet winding cylindrical material, and that fastens the side edge portions of the protective sheet wrapped around the synthetic yarn by the sheet winding mechanism ;
A thread bundle cutting mechanism for cutting a long thread bundle wrapped with a protective sheet into a length according to the application;
An apparatus for bundling synthetic yarn, comprising:

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