JP2013067460A - Yarn unwinding auxiliary device of automatic winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect from dust so as to prevent cotton fly from adhering to a moving mechanism for moving up/down a movable cylinder that moves as a yarn is unwound.SOLUTION: A yarn unwinding auxiliary device includes a movable cylinder 13 (regulation cylinder) which moves as a yarn Y is unwound from a bobbin B to assist unwinding of the yarn Y, and a holder 12 which supports the movable cylinder 13. The yarn unwinding auxiliary device also includes a moving mechanism 3 which includes a motor M, a screw member 30 and the like to move up/down the movable cylinder 13 by moving up/down the holder 12. Additionally, the yarn unwinding auxiliary device includes a surrounding mechanism 4 (cover member) for protecting the moving mechanism 3 from dust. The surrounding mechanism 4 includes an expansion and contraction member 41 which is vertically expanded and contracted when the movable cylinder 13 is moved up/down.

Description

  The present invention relates to a yarn unwinding assisting device that is applied to an automatic winder and assists unwinding of a yarn from a bobbin.

  As shown in FIG. 1, the automatic winder unwinds the yarn Y of the bobbin B and winds a plurality of winding devices 2 wound around the winding tube and winding packages fully wound in each winding device 2. A doffing device 7 for lifting is provided. Each winding device 2 includes a yarn unwinding assisting device that regulates a balloon formed when unwinding the yarn Y from the bobbin B, applies an appropriate tension to the yarn Y, and assists the unwinding of the yarn Y. Is provided.

  For example, as shown in FIG. 8, a conventional yarn unwinding assisting device 9 includes a fixed cylinder 90 that is fixed when the yarn Y is unwound from the bobbin B, and a fixed cylinder 90 that is externally fitted to the bobbin B. A movable cylinder (regulator cylinder) 91 that moves following the unwinding of the yarn Y from the knitting machine, an elevating mechanism 92 for raising and lowering the movable cylinder 91, and the like. The elevating mechanism 92 is provided in the frame inside 93 of the winding device 2, and includes an air cylinder 94, an elevating guide member 95 extending in the vertical direction, a slider 96 movable along the elevating guide member 95, and the like. Thus, the movable cylinder 91 is moved up and down by moving up and down the holder 97 that supports the movable cylinder 91. Here, a guide hole (not shown) extending in the vertical direction is formed in the frame 93 so that the holder 97 extending in and out of the frame 93 of the winding device 2 can be moved up and down.

  By the way, when the yarn Y is unwound from the bobbin B by each winding device 2, fluff is generated and scattered, and accumulates in every part of the winding device 2 including the yarn unwinding assisting device 9. If the fluff accumulates on the movable part of the winding device 2, it causes a malfunction.

  In the conventional yarn unwinding assisting device 9, the lifting mechanism 92 is provided inside the frame 93, so that the fluff is hardly deposited. However, as described above, since the guide hole is formed in the frame 93 so that the holder 97 can move up and down, the fluff enters from the guide hole and accumulates in the lifting mechanism 92. For example, if the fluff adheres to the air cylinder 94 of the lifting mechanism 92, there is a problem that the packing of the air cylinder 94 becomes defective and the movable cylinder 91 cannot be lifted or lowered. Therefore, maintenance for removing dust such as fluff adhering to the lifting mechanism 92 must be periodically performed.

  In addition to this, for example, Patent Document 1 discloses a yarn unwinding assisting device having the same configuration as that shown in FIG. It is disclosed. Since the feed screw that constitutes the lifting mechanism particularly dislikes dust, it is necessary to perform maintenance on the fluff of the lifting mechanism at a very short interval in the yarn unwinding assist device as in Patent Document 1. . However, in Patent Document 1, nothing is said about dust prevention for the lifting mechanism.

  As described above, even if the elevating mechanism is provided inside the frame, it is necessary to form a guide hole in the frame for elevating the holder, and fluff enters from there and adheres to the elevating mechanism. For this reason, maintenance of the lifting mechanism for the fluff has been indispensable.

JP 2009-242028 A

  Therefore, the problem to be solved by the present invention is to provide a yarn unwinding assisting device for an automatic winder that prevents dust from attaching to a lifting mechanism for lifting and lowering a movable cylinder that assists in unwinding the yarn. To do.

In order to solve the above-mentioned problems, a yarn unwinding assist device for an automatic winder according to the present invention follows a yarn unwinding from a bobbin, and supports a restriction tube for assisting the yarn unwinding, and a restriction tube A holder that lifts and lowers the holder and raises and lowers the regulating cylinder, and a cover member for dust-proofing the lifting mechanism,
With
The cover member
It is characterized by comprising an expansion / contraction member that expands and contracts in the vertical direction as the regulation cylinder moves up and down.

Preferably, the cover member is
A non-stretchable cup member is further provided at the lower end of the stretchable member and covers the lifting mechanism for dust prevention.

  Preferably, the elevating mechanism includes a screw member that extends in the vertical direction and is rotatably supported around the axis, an elevating guide member that extends in parallel to the screw member, and a drive for rotationally driving the screw member. And a slider that is guided by the elevation guide member and moves up and down with the holder by rotation of the screw member.

  In the automatic winder's yarn unwinding assisting device according to the present invention, as described above, the cover member for dust-proofing the elevating mechanism includes an expansion / contraction member that expands and contracts in the vertical direction as the regulation cylinder moves up and down. By providing this expansion and contraction member, it is possible to realize a configuration in which the restriction cylinder is raised and lowered by raising and lowering the holder as in the past, while maintaining the state where the raising and lowering mechanism is completely dust-proof so that the fluff does not adhere. .

  As a result, no fluff adheres to the lifting mechanism as in the prior art, and maintenance of the lifting mechanism with respect to the flapping becomes unnecessary. In addition, because of the complete dustproofing of the lifting mechanism, the yarn unwinding assisting device can be designed by freely selecting the positioning of the lifting mechanism without worrying about the influence of fluff.

It is a front view which shows the whole structure of an automatic winder. It is a schematic side view which shows the structure of a winding apparatus. It is a partially broken side view of the yarn unwinding assist device according to the present invention. It is a partially broken side view of the unwinding auxiliary unit, (A) is a view in which the movable cylinder is lowered, (B) is a view in which the movable cylinder is raised. It is a front view of the yarn unwinding auxiliary device according to the present invention. It is a partially broken plan view of the yarn unwinding assist device according to the present invention. It is a partially broken side view of another embodiment of the unwinding auxiliary unit, (A) is a view in which the movable cylinder is lowered, (B) is a view in which the movable cylinder is raised. It is a side view which shows the conventional yarn unwinding assistance apparatus.

  Hereinafter, a yarn unwinding assist device (hereinafter simply referred to as a yarn unwinding assist device) of an automatic winder according to the present invention will be described.

  As shown in FIG. 1, the automatic winder includes a plurality of winding devices 2 arranged in a straight line. The automatic winder includes a bobbin supply device 6 that supplies the bobbin B to each winding device 2 and a doffing device 7 that performs a doffing operation. Furthermore, the automatic winder includes a machine base control device 8 that controls each winding device 2, bobbin supply device 6, doffing device 7, and the like.

  As shown in FIG. 2, the winding device 2 is provided with a yarn unwinding auxiliary device 1, a tension device 22, a yarn joining device 23, and a slab catcher 24 in order from the bottom to the top. Further, the winding device 2 includes a traverse drum 25 that traverses the yarn Y in a certain width range, a guide plate 26 that is provided facing a traverse region of the traverse drum 25, and a cradle that rotatably supports the package P. 27.

  The winding device 2 is provided with a relay pipe 28 and a suction mouth 29 that suck and capture the cut yarn and pass it to the yarn joining device 23. The yarn Y fed out from the bobbin B is checked for yarn defects while passing from the tension device 22 through the slab catcher 24. If there is a defective portion in the yarn Y, the defective portion is cut by a cutter provided in the yarn joining device 23 and a cutter provided in the slab catcher 24 and removed by suction.

  As shown in FIG. 3, the yarn unwinding assisting device 1 is attached to the frame 21 of the winding device 2 by the mounting member 20, and assists the unraveling of the bobbin B above the bobbin B that is fixed upright on the transport tray 61. To do. The yarn unwinding auxiliary device 1 includes a unwinding auxiliary unit U including a fixed cylinder (first restriction cylinder) 11, a movable cylinder (second restriction cylinder) 13 and the like described below. The size of the balloon formed by the yarn Y that is unwound from is controlled, and an appropriate tension is applied to the yarn Y.

  The unraveling auxiliary unit U includes a fixed cylinder 11 supported by the first holder 10 and a movable cylinder 13 supported by the second holder 12. The fixed cylinder 11 regulates the expansion of the balloon in a fixed state, and the movable cylinder 13 moves following the unwinding of the yarn Y from the bobbin B to regulate the expansion of the balloon and assists the unwinding of the yarn Y. To do.

  The fixed cylinder 11 and the movable cylinder 13 are cylindrical bodies whose upper and lower ends are open, and the movable cylinder 13 is fitted on the fixed cylinder 11. The fixed cylinder 11 is provided with a thread guide 14 at its lower end. At the lower end of the movable cylinder 13, a tapered introduction port 15 that expands downward is formed. The central axis of the bobbin B and the central axes of the fixed cylinder 11 and the movable cylinder 13 coincide with each other.

  An opposing support arm 16 is fixed to the movable cylinder 13, and a sensor 17 for detecting the chase portion 60 of the bobbin B is disposed on the opposing surface of the support arm 16. The sensor 17 is an optical sensor including a light receiving unit and a light projecting unit, and detects the height of the chase unit 60.

  Furthermore, the unraveling auxiliary unit U includes an elevating mechanism 3 for elevating the movable cylinder 13 as shown in FIG. 4A. The entire lifting mechanism 3 is completely surrounded by the surrounding mechanism (cover member) 4 and is dust-proof so that the fluff generated when the yarn Y is unwound is not attached. The lifting mechanism 3 includes a screw member 30 that extends in the vertical direction, a lifting guide member 31 that extends parallel to the screw member 30, and a slider 32 that is guided by the lifting guide member 31.

  The screw member 30 and the lifting guide member 31 are supported by the upper support member 33 on the upper end side and supported by the lower support member 34 on the lower end side. The screw member 30 is inserted into a bearing 35 provided on the upper support member 33 and the lower support member 34, and is supported so as to be rotatable around an axis. A nut member 36 that moves up and down by the rotation of the screw member 30 is screwed into the screw member 30. The nut member 36 is fixed to the slider 32. The upper support member 33 is fixed to the surrounding mechanism 4, and the lower support member 34 is not fixed to the surrounding mechanism 4.

  The elevating mechanism 3 includes a motor M as a drive source for rotationally driving the screw member 30 and a toothed belt 37 as a transmission member for transmitting the power of the motor M. The toothed belt 37 engages with a pulley attached to the output shaft of the motor M and a pulley attached to the screw member 30, and transmits the power of the motor M to the screw member 30. With the above configuration, the screw member 30 is driven to rotate about the axis by rotating the motor M forward or backward, so that the nut member 36 screwed into the screw member 30 is moved up and down, thereby the slider 32 is moved. Go up and down.

  The surrounding mechanism (cover member) 4 surrounds the entire lifting mechanism 3 so that the fluff generated when the yarn Y is unwound does not adhere to the lifting mechanism 3. The surrounding mechanism 4 includes an upper cover 40 that covers the motor M and the like for dust prevention. The upper support member 33 is fixed to the upper cover portion 40, and the first holder 10 that supports the fixed cylinder 11 is fixed to the outer surface thereof.

  The surrounding mechanism 4 includes a bellows member 41 as an elastic member that covers the screw member 30, the elevating guide member 31, the slider 32 and the like for dust prevention, and a non-expandable cup member 42. The bellows member 41 has a cylindrical shape and can be expanded and contracted. The bellows member 41 is provided so that the expansion / contraction direction thereof is the vertical direction and covers the periphery of the screw member 30 and the lifting guide member 31. The bellows member 41 has an upper end connected to the upper cover portion 40 and a lower end connected to the cup member 42 via a ring-shaped connecting member 43.

  The cup member 42 provided at the lower end of the bellows member 41 is made of a hard material such as resin or metal and is non-stretchable. The cup member 42 is open at the upper end and closed at the lower end, and is attached to the connecting member 43 to cover the screw member 30, the lifting guide member 31 and the like from below. In this way, the surrounding mechanism 4 completely surrounds the entire lifting mechanism 3 and prevents dust such as fluff from entering the inside.

  The slider 32 is fixed to the inner surface of the ring-shaped connecting member 43, and the second holder 12 that supports the movable cylinder 13 is fixed to the outer surface. Accordingly, when the slider 32 is moved up and down by the motor M, the connecting member 43, the second holder 12, and the cup member 42 are moved up and down together, so that the movable cylinder 13 is moved up and down.

  When the movable cylinder 13 moves up and down in this way, the upper end side of the bellows member 41 is fixed to the upper cover portion 40 and thus does not move up and down. However, the lower end side of the bellows member 41 is attached to the connecting member 43 and thus moves up and down. Therefore, the bellows member 41 expands and contracts in the vertical direction as the movable cylinder 13 moves up and down. The bellows member 41 expands when the movable cylinder 13 descends (FIG. 4A), and shortens when the movable cylinder 13 rises (FIG. 4B). Thus, by expanding and contracting the bellows member 41 corresponding to the raising and lowering of the movable cylinder 13, no gap is formed in the enveloping mechanism 4 so that fluff enters the inside even when the movable cylinder 13 is raised and lowered. Yes.

  As described above, the bellows member 41 (extensible member) that covers the elevating mechanism 3 extends and contracts in the vertical direction, and the second holder 12 that supports the movable cylinder 13 is the outer surface of the enclosing mechanism 4, and the slider 32. At the same time, the movable cylinder 13 is moved up and down so as to be fixed to a position that moves up and down (the outer surface of the connecting member 43). With this configuration, the elevating mechanism 3 can move the movable cylinder 13 up and down via the second holder 12 while keeping the elevating mechanism 3 completely dust-proof. Accordingly, the fluff generated when the yarn Y is unwound does not adhere to the lifting mechanism 3, and even if the lifting mechanism 3 is suspended near the bobbin B as in this embodiment, the lifting mechanism 3 does not wind. There is no worry of malfunction due to cotton. And the maintenance with respect to the fluff of the raising / lowering mechanism 3 conventionally needed to be performed periodically becomes unnecessary.

  In the case where the surrounding mechanism 4 is disposed in the vicinity of the bobbin B as in the present embodiment, the thread Y that is drawn to the discharged bobbin B may come into contact with the lower side of the surrounding mechanism 4. It is conceivable that a part of the surrounding mechanism 4 is torn due to the above and the dustproof property is impaired. However, in the case of the present embodiment, the lower side of the enveloping mechanism 4 is constituted by a non-stretchable and hard cup member 42, so even if the yarn Y comes into contact, it will not tear, The dustproof property of the surrounding mechanism 4 is not impaired.

  4A and 4B, when the movable cylinder 13 is lowered, the cup member 42 is also lowered, so that the height H from the base surface 62 of the surrounding mechanism 4 is gradually lowered. Therefore, when the movable cylinder 13 is lowered as the yarn Y is unwound, care must be taken so that the cup member 42 does not contact the base surface 62.

  The unraveling auxiliary unit U includes the fixed cylinder 11, the movable cylinder 13, the elevating mechanism 3, and the enclosing mechanism 4, which are integrated by coupling with the first holder 10, the second holder 12, and the like.

  As shown in FIG. 5, the yarn unwinding assisting device 1 includes a casing 18 in which a control unit 19 for controlling the unwinding assisting unit U is accommodated. The case 18 is fixed to the frame 21 of the winding device 2. The control unit 19 includes a drive board for driving the motor M, a power source, and the like. As shown in FIG. 6, a cover 18 a is attached to the back surface of the casing 18, and the control unit 19 can be accommodated in the casing 18 by removing the cover 18 a.

  Further, rubber bushes 38 are respectively provided on the side surface of the casing 18 and the side surface of the upper cover portion 40, and the wiring 39 from the control unit 19 is connected to the motor M through these rubber bushes 38. Thereby, the control part 19 and the motor M are electrically connected. Although not shown, the wiring 39 from the control unit 19 is also connected to the sensor 17.

  The yarn unwinding assisting device 1 configured as described above assists in unwinding the yarn Y from the bobbin B. As the yarn Y is unwound from the bobbin B, the height of the chase portion 60 of the bobbin B gradually decreases. When the sensor 17 detects the descent of the chase unit 60, the sensor 17 outputs a detection signal to the control unit 19. Upon receiving this detection signal, the control unit 19 drives the motor M of the elevating mechanism 3 surrounded by the enclosing mechanism 4 to lower the slider 32 to a predetermined position, thereby moving the movable cylinder 13 to the height of the chase unit 60. Following the change, it is lowered to a new operating position. The descending following the change in the height of the chase portion 60 of the movable cylinder 13 is repeated until the yarn Y wound around the bobbin B becomes about 1/3.

  The height of the unwinding auxiliary unit U as a whole is set in accordance with the vertical dimension of the bobbin B. Therefore, if the vertical dimension of the bobbin B to be used changes, it is necessary to change and adjust the height of the unwinding auxiliary unit U. Therefore, the yarn unwinding assisting device 1 includes a height adjusting mechanism 5 for adjusting the height of the unwinding assisting unit U with respect to the bobbin B, as shown in FIG.

  The height adjustment mechanism 5 operates a shaft 50 as a guide member for guiding the unwinding auxiliary unit U in the vertical direction, a clamp member 51 capable of gripping and releasing the shaft 50, and gripping and releasing the clamp member 50. The operation lever 52 is provided. An upper end and a lower end of the shaft 50 are fixed to a pair of upper and lower projecting portions 53 extending horizontally from the side surface of the casing 18.

  The clamp member 51 is attached to the unwinding auxiliary unit U at the rear surface. The unraveling auxiliary unit U is supported by the shaft 50 and the clamp member 51 and is suspended above the bobbin B. The clamp member 51 is movable along the shaft 50 when the shaft 50 is not gripped. Since the unwinding auxiliary unit U and the clamp member 51 move together, the unwinding auxiliary unit U is guided in the vertical direction along the shaft 50.

  The unwinding auxiliary unit U and the clamp member 51 are attached by a single detachable member (not shown) such as a screw. Therefore, the operator can remove the entire unwinding auxiliary unit U only by removing the one attaching / detaching member, and the maintenance of the unraveling auxiliary unit U is easy.

  The operation lever 52 attached to the clamp member 51 is rotated in the opposite direction so that the clamp member 51 holds the shaft 50 by rotating in one direction, so that the clamp member 51 holds the shaft 50 on the shaft 50. It is configured to be able to cancel. When the clamp member 51 grips the shaft 50 by the operation of the operation lever 52, a tightening force is applied and the clamp member 51 is fixed to the shaft 50, so that the unwinding auxiliary unit U is positioned and fixed.

  When the height of the unwinding auxiliary unit U with respect to the bobbin B is adjusted with the change in the vertical dimension of the bobbin B, the operator first operates the operation lever 52 to release the grip of the clamp member 51 from the shaft 50. To do. Then, the unwinding auxiliary unit U is moved along the shaft 50 to a desired height corresponding to the vertical dimension of the bobbin B. Then, the operation lever 52 is operated again so that the clamping member 51 grips the shaft 50 to position and fix the unwinding auxiliary unit U at a desired height.

  Thus, the operator can adjust the height of the unwinding auxiliary unit U with respect to the bobbin B simply by gripping and releasing the clamping member 51 with the operation lever 52 in front of the yarn unwinding auxiliary device 1. Can do. That is, the height adjustment of the unwinding auxiliary unit U with respect to the bobbin B can be easily performed manually without using a tool.

  The shaft 50 may be provided with a mark (not shown) for positioning the unwinding auxiliary unit U. The marks are, for example, scales that are attached at predetermined intervals in the vertical direction on the shaft 50. The scale may be provided by directly carving the shaft 50 as long as it does not affect the gripping of the clamp member 51 with respect to the shaft 50. By providing such a mark on the shaft 50, the operator can adjust the height of the unwinding auxiliary unit U more easily.

  In the present embodiment, since the guide member that guides the clamp member 51 in the vertical direction is configured by the shaft 50, the clamp member 51 rotates around the shaft 50 only by the above configuration. When the clamp member 51 rotates around the shaft 50, the unwinding auxiliary unit U rotates around the shaft 50. When adjusting the height of the unwinding auxiliary unit U, even if the unwinding auxiliary unit U is positioned at a desired height, if the unwinding auxiliary unit U rotates even a little around the shaft 50, the fixed cylinder 11 and The central axis of the movable cylinder 13 is displaced from the central axis of the bobbin B.

  Therefore, the height adjusting mechanism 5 includes a rotation restricting member 54 for restricting rotation about the shaft 50 of the unwinding auxiliary unit U. The rotation restricting member 54 extends in parallel to the shaft 50 and is fixed to the side surface of the casing 18. As shown in FIGS. 5 and 6, the rotation restricting member 54 is engaged with a recess 55 formed in the clamp member 51 in the vertical direction, and the clamp member 51 is guided by the rotation restricting member 54 in the vertical direction. Move to slide.

  Since the engagement prevents the clamp member 51 from rotating around the shaft 50, the rotation of the unwinding assisting unit U around the shaft 50 is restricted. Thereby, the unwinding auxiliary unit U can be moved to a desired height and positioned while the center axis of the bobbin B and the center axes of the fixed cylinder 11 and the movable cylinder 13 coincide with each other.

  Further, as shown in FIG. 5, the rotation restricting member 54 is formed so that its vertical dimension is shorter than the vertical dimension of the shaft 50 and is fixed to the side surface of the casing 18 so as to be positioned within a predetermined height range with respect to the shaft 50. ing. Therefore, if the clamp member 51 is moved upward or downward along the shaft 50 to remove it from the height range of the rotation restricting member 54, the engagement between the recess 55 and the slide guide member 54 is released, and the clamp member 51 is removed. It can be removed from the rotation restricting member 54. That is, the operator can cancel the restriction of rotation about the shaft 50 of the release auxiliary unit U.

  When the worker releases the rotation restriction of the unwinding auxiliary unit U and rotates the unwinding auxiliary unit U around the shaft 50 as shown by the arrow in FIG. 6, the surrounding mechanism 4 at the rear of the casing 18 is moved. Because of the movement, a working space is secured behind the casing 18. Thereby, the operator can remove the cover 18a on the back surface of the casing 18, and can maintain and take out the control unit 19 in the casing 18. In other words, the above configuration allows the operator to intentionally release the rotation restriction that was necessary when adjusting the height of the release auxiliary unit U, thereby ensuring a work space for maintenance. .

The yarn unwinding assisting apparatus 1 according to the present invention is not limited to the above embodiment.
In the above embodiment, the bobbin supply device 3 of the automatic winder is a tray-type supply device, but a magazine-type supply device may be adopted. Moreover, although the scale for positioning the unwinding auxiliary unit U is provided on the shaft 50, it may be provided at a position where the operator can easily recognize the height when adjusting the height, such as the rotation regulating member 54, the front surface or the side surface of the casing 18. Good.

  The bellows member 41 is employed as an elastic member that covers the elevating mechanism 3 for dust prevention, but is not limited thereto. The expansion / contraction member may have another configuration as long as it can protect the elevating mechanism 3 from dust such as fluff and can be expanded and contracted in the vertical direction as the movable cylinder moves up and down. For example, the expansion / contraction member may be a continuous cylinder configured to be able to expand and contract in the vertical direction by fitting a plurality of cylinders having different diameters in order of diameter.

  Although the surrounding mechanism 4 provided with the bellows member 41 and the cup member 42 was shown in FIG. 4, it is not limited to this. For example, there is a configuration shown in FIG. In FIG. 7, the upper side of the connecting member 43 is configured by the first bellows member 41 a as in FIG. 4, and the lower side of the connecting member 43 is configured by the second bellows member 41 b whose lower end is closed instead of the cup member 42. The upper end of the second bellows member 41 b is attached to the connecting member 43. A lower support member 34 that supports the screw member 30 and the guide member 31 is fixed to the lower end of the second bellows member 41b. Other configurations are the same as those in FIG.

  According to this configuration, when the slider 32 is moved up and down by the motor M to move the movable cylinder 13 up and down, the upper end of the second bellows member 41 b moves up and down, but the lower end of the second bellows member 41 b is fixed to the lower support member 34. Therefore, it does not go up and down. Therefore, not only the first bellows member 41a but also the second bellows member 41b expands and contracts in the vertical direction as the movable cylinder 13 moves up and down. When the movable cylinder 13 is lowered, the first bellows member 41a is extended and the second bellows member 41b is shortened (FIG. 7A). When the movable cylinder 13 is raised, the first bellows member 41a is shortened and the second bellows member 41b is elongated (FIG. 7B). Even in this configuration, even if the movable cylinder 13 is moved up and down, a gap is not formed in the surrounding mechanism 4 so that the fluff enters the inside, and the dustproof property is maintained.

  As can be seen from FIGS. 7A and 7B, according to this configuration, even if the movable cylinder 13 is moved up and down, the position of the lower end of the second bellows member 41b does not change, so the height H from the base surface 62 of the enclosing mechanism 4 Does not change. Therefore, unlike the embodiment of FIG. 4, it is not necessary to worry about the height H from the base surface 62 when the elevating mechanism 3 is suspended. However, unlike the embodiment of FIG. 4, the second bellows member 41 b constituting the lower side of the enclosing mechanism 4 has elasticity, so that the yarn Y may be torn and the torn portion Since there is a risk that dust and the like may invade from the inside and the dustproofness may be impaired, it is necessary to pay attention to this point.

1 Thread unwinding assist device 11 Fixed cylinder (first regulating cylinder)
12 Second holder (holder for movable cylinder)
13 Movable cylinder (second regulating cylinder)
3 Lifting mechanism 30 Screw member 31 Lifting guide member 32 Slider 4 Enclosing mechanism (cover member)
41 Bellows member (expandable member)
42 Cup member 5 Elevating mechanism 50 Shaft (guide member)
51 Clamp member 52 Operation lever 54 Rotation restricting member B Bobbin M Motor (drive source)
U Unwinding auxiliary unit Y thread

Claims (3)

A regulating cylinder that follows the unwinding of the yarn from the bobbin, assists the unwinding of the yarn, a holder that supports the regulating cylinder, a lifting mechanism that raises and lowers the holder and raises and lowers the regulating cylinder, A cover member for dust-proofing the lifting mechanism;
With
The cover member is
A yarn unwinding assisting device for an automatic winder, comprising an expansion / contraction member that expands and contracts in the vertical direction as the regulation cylinder moves up and down. The cover member is
2. The yarn unwinding assisting device for an automatic winder according to claim 1, further comprising a non-stretchable cup member provided at a lower end of the stretchable member and covering the lifting mechanism for dust prevention.   The elevating mechanism includes a screw member that extends in the vertical direction and is rotatably supported around an axis, an elevating guide member that extends in parallel to the screw member, and a drive for rotationally driving the screw member. The automatic winder yarn unwinding assisting device according to claim 1 or 2, further comprising a power source and a slider that is guided by the lifting guide member and moves up and down together with the holder by rotation of the screw member. .

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