Yarn winding machine

Abstract

To provide a yarn winding machine which includes a high-quality yarn storage roller constituted by a proper resin material.SOLUTION: An automatic winder includes a yarn supply part, a yarn storage part, and a winding part. The yarn supply part can supply a yarn. The yarn storage part draws a yarn out of the yarn supply part, and stores the drawn-out yarn. The winding part winds up the yarn stored at the yarn storage part and forms a package. The yarn storage part has a yarn storage roller which, by being rotationally driven, winds the yarn drawn out from the yarn supply part around an outer peripheral surface and stores it. A material constituting the yarn storage roller includes nylon, ABS resin and glass fiber, and at least on the outer peripheral surface, a plated layer is formed.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention mainly relates to a yarn winding machine including a yarn pooling roller. [Background technology]

[0002] Patent Document 1 discloses that the yarn storage roller is made of a non-metallic material. Patent Document 1 discloses thermoplastic resin and thermosetting resin as examples of the non-metallic material, and that a fiber-reinforced resin may be blended with the thermosetting resin. Patent Document 1 also discloses that a plated layer is formed on the surface of the yarn storage roller. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-159467 Summary of the Invention [Problem to be solved by the invention]

[0004] The resin material of the yarn storage roller is required to have various properties, such as tensile strength, bending strength, raw material cost, and suitability for plating. Suitability for plating refers to, for example, the surface roughness when a plating layer is formed on the resin material and the adhesion between the resin material and the plating layer. In this regard, Patent Document 1 does not disclose the detailed properties of each resin material, nor does it disclose to what extent each resin material satisfies the functions required for the yarn storage roller.

[0005] The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a yarn winding machine including a high-quality yarn pooling roller made of an appropriate resin material.

[0006] The problem to be solved by the present invention is as described above. Next, the means for solving this problem and the effects thereof will be explained.

[0007] According to an aspect of the present invention, there is provided a yarn winding machine having the following configuration. Specifically, the yarn winding machine includes a yarn supplying unit, a yarn storage unit, and a winding unit. The yarn supplying unit is capable of supplying yarn. The yarn storage unit draws the yarn from the yarn supplying unit and stores the drawn yarn. The winding unit winds the yarn stored in the yarn storage unit to form a package. The yarn storage unit has a yarn storage roller that is driven to rotate and winds the yarn drawn from the yarn supplying unit around its outer circumferential surface to store the yarn. The yarn storage roller is made of materials including nylon, ABS resin, and glass fiber, and has a plating layer formed on at least its outer circumferential surface.

[0008] A yarn storage roller made of the above-mentioned material has excellent tensile strength, bending strength, raw material cost, and suitability for plating, thereby realizing a yarn winding machine equipped with a high-quality yarn storage roller.

[0009] The yarn winding machine preferably has the following configuration: the plating layer has a lower layer and a surface layer formed on the outer surface of the lower layer, and the surface layer is nickel plated.

[0010] By forming the surface layer with nickel plating, a yarn storage roller with excellent surface properties can be realized. In addition, by adopting a multi-layer structure consisting of a surface layer and an underlayer, costs can be reduced compared to when nickel plating alone is used.

[0011] In the yarn winding machine, it is preferable that the diameter of the yarn pooling roller is 140 mm or more and 160 mm or less.

[0012] This reduces the moment of inertia compared to when a metal yarn pooling roller with the same diameter is used, thereby reducing the power consumption of the motor that drives the yarn pooling roller.

[0013] The above-described yarn winding machine is preferably configured as follows: The yarn storage section includes a roller support section that supports an axial end of the yarn storage roller. An annular attachment protrusion that protrudes in the axial direction is formed on the axial end of the yarn storage roller. The roller support section is formed with an attachment groove into which the attachment protrusion fits.

[0014] This makes it less likely for the yarn end to get inside the yarn pooling roller compared to a configuration in which the mounting protrusion and mounting groove are not formed.

[0015] The yarn winding machine preferably includes a charge eliminating member arranged to be in contact with a reference potential point provided in the yarn storage section and to be in contact with the plating layer.

[0016] This allows the charge that has flowed from the thread to be removed.

[0017] The yarn winding machine preferably has the following configuration: the yarn winding machine includes a motor that rotates and drives the yarn pooling roller, and a metal shaft mounting portion for mounting an output shaft of the motor is inserted into the yarn pooling roller.

[0018] This allows the main parts of the yarn pooling roller to be made of resin material, while the parts that require high strength are made of metal, thereby reducing the weight of the yarn pooling roller while ensuring its functionality.

[0019] The above-described yarn winding machine is preferably configured as follows: A first member is disposed at a position different from the axial position of the yarn pooling roller, and an adjustment member for adjusting the position of the center of gravity of the yarn pooling roller is disposed on the opposite side of the axial position from the first member instead of the first member.

[0020] This allows the position of the center of gravity of the yarn pooling roller to be closer to the shaft position.

[0021] In the yarn winding machine, it is preferable that a space be formed inside the outer circumferential surface of the yarn pooling roller, and that a lid be disposed to close the space.

[0022] This makes it possible to prevent the accumulation of fly lint in the space inside the yarn storage roller. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a front view of an automatic winder according to an embodiment of the present invention; [Figure 2] FIG. 2 is a side view of a winding unit provided in the automatic winder. [Figure 3] 10 is a table showing the results of an experiment evaluating the properties of the yarn storage roller depending on the material. [Figure 4] FIG. 2 is a perspective view showing the outer shape of the yarn pooling roller. [Figure 5] FIG. 3 is a cross-sectional view of the yarn storage roller taken along a plane parallel to the axial direction. [Figure 6] FIG. 4 is a perspective view showing the internal structure of the base end side of the yarn pooling roller. [Figure 7] FIG. 4 is a perspective view showing the internal structure of the tip side of the yarn pooling roller. [Figure 8] FIG. [Figure 9] FIG. 10 is a perspective view showing a state in which the mark on the yarn storage roller and the notch in the lid portion are aligned. DETAILED DESCRIPTION OF THE INVENTION

[0024] Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a front view of an automatic winder 1 according to this embodiment.

[0025] An automatic winder (yarn winding machine) 1 shown in Fig. 1 winds a yarn 20 onto a winding bobbin 22 to form a package 30. The automatic winder 1 includes a plurality of winding units 2 arranged side by side, a machine control device 3, a bobbin supplying device 4, a doffing device 5, and a blower box (not shown).

[0026] The machine control device 3 is capable of communicating with each winding unit 2. The operator of the automatic winder 1 centrally manages the multiple winding units 2 by checking the information displayed on the machine control device 3 and operating the machine control device 3. The machine control device 3 also controls the operations of the bobbin supply device 4 and the doffing device 5.

[0027] The bobbin supplying device 4 sets the yarn supplying bobbins 21 one by one on a tray 26 and supplies them to each of the plurality of winding units 2.

[0028] The doffing device 5 can travel in the direction in which the winding units 2 are arranged. When a specified amount of yarn 20 has been wound onto the winding bobbin 22 in a certain winding unit 2 to form a package 30, the doffing device 5 travels to the position of that winding unit 2. The doffing device 5 removes the package 30 from the winding unit 2 and sets the winding bobbin 22 on which the yarn 20 is not wound into the winding unit 2.

[0029] Next, the configuration of the winding unit 2 will be described with reference to Fig. 2. Fig. 2 is a side view of the winding unit 2 provided in the automatic winder 1. In the following description, the terms "upstream side" and "downstream side" refer to the upstream side and downstream side in the running direction of the yarn 20 when the yarn 20 is being wound.

[0030] The winding unit 2 includes a yarn supplying section 6, a yarn storage section 18, and a winding section 8. The winding unit 2 unwinds the yarn 20 from a yarn supplying bobbin 21 supplied to the yarn supplying section 6, and temporarily stores the unwound yarn 20 in the yarn storage section 18. The winding section 8 winds the yarn 20 stored in the yarn storage section 18 onto a winding bobbin 22 to form a package 30.

[0031] The yarn supplying unit 6 holds the yarn supplying bobbin 21 set on the tray 26 at a predetermined position. The yarn supplying unit 6 supplies the yarn 20 unwound from the yarn supplying bobbin 21 to the downstream side. When all the yarn 20 has been unwound from the yarn supplying bobbin 21, the yarn supplying unit 6 discharges the yarn supplying bobbin 21. After discharging the yarn supplying bobbin 21, the yarn supplying unit 6 receives a new yarn supplying bobbin 21 from the bobbin supply device 4.

[0032] The yarn storage unit 18 is disposed between the yarn supplying unit 6 and the winding unit 8, and temporarily stores the yarn 20 supplied from the yarn supplying unit 6. The yarn storage unit 18 includes a yarn storage roller 32 and a motor 34.

[0033] The yarn storage roller 32 is a substantially cylindrical member. The yarn storage roller 32 stores the yarn 20 by winding the yarn 20 around its outer circumferential surface. The motor 34 rotates and generates a driving force based on commands from the control unit 25 (described later). The driving force generated by the motor 34 is transmitted to the yarn storage roller 32, causing the yarn storage roller 32 to rotate about its central axis. In the present embodiment, the motor 34 is directly attached to the yarn storage roller 32. However, the motor 34 may alternatively be disposed at a position away from the yarn storage roller 32, and the driving force may be transmitted to the yarn storage roller 32 via a power transmission member. Hereinafter, the axial root side, lower side, upstream side in the yarn running direction, or side closer to the motor 34 of the yarn storage roller 32 may be referred to as the "base end side," and the opposite side may be referred to as the "tip side."

[0034] The control unit 25 controls each part of the winding unit 2. The control unit 25 includes a calculation device such as a CPU, a memory, a storage, and a communication device. The calculation device reads a program stored in the storage into the memory and executes the program, thereby controlling each part of the winding unit 2.

[0035] The yarn storage section 18 rotates the yarn storage roller 32 in a predetermined direction (winding direction) with the yarn 20 wound around it, thereby pulling the yarn 20 upstream of the yarn storage section 18 (toward the yarn supplying bobbin 21). This allows the yarn 20 to be unwound from the yarn supplying bobbin 21 and wound around the surface of the yarn storage roller 32. As shown in FIG. 2 , the yarn 20 is guided toward the base end of the yarn storage roller 32, and the yarn 20 is sequentially wound around the yarn storage roller 32 while pushing aside the yarn layers from the base end to the tip end of the yarn storage roller 32. As a result, the yarn 20 on the yarn storage roller 32 is pushed by the newly wound yarn 20 and is sequentially fed toward the tip end on the surface of the yarn storage roller 32. The yarn 20 on the yarn storage roller 32 is pulled downstream via a pull-out guide 37, which is located on an extension of the central axis of the yarn storage roller 32.

[0036] The yarn storage unit 18 has a function of preventing fluctuations in the tension of the yarn 20 unwound from the yarn supplying bobbin 21 from propagating to the winding unit 8. This suppresses fluctuations in the tension of the yarn 20 supplied to the winding unit 8, enabling the formation of a high-quality package 30.

[0037] A ring member 33 is hung on the outer peripheral surface of the yarn storage roller 32. The ring member 33 is, for example, a rubber band, but may also be another elastic member. The yarn 20 passes between the ring member 33 and the surface of the yarn storage roller 32 and is pulled downstream from the yarn storage roller 32. The provision of the ring member 33 applies an appropriate tension to the yarn 20 being unwound from the yarn storage roller 32. As a result, excessive balloon formation due to swinging of the yarn 20 can be suppressed, and unwinding of the yarn 20 can be stabilized. Note that the ring member 33 is not an essential component and can be replaced with another tension-applying mechanism, such as a flyer (a rod-shaped locking member).

[0038] The winding section 8 includes a cradle 23 configured to be able to mount a winding bobbin 22, and a traverse drum 24 that drives the winding bobbin 22 while traversing the yarn 20.

[0039] The cradle 23 rotatably supports the winding bobbin 22. The cradle 23 brings the outer peripheral surface of the supported package 30 into contact with the outer peripheral surface of the traverse drum 24.

[0040] The traverse drum 24 is rotationally driven by a drive source (not shown). When the traverse drum 24 is rotationally driven while in contact with the outer peripheral surface of the winding bobbin 22 (or package 30), the winding bobbin 22 is rotated. As a result, the winding unit 8 unwinds and pulls out the yarn 20 stored in the yarn storage unit 18, and winds it onto the winding bobbin 22. A traverse groove (not shown) is formed on the outer peripheral surface of the traverse drum 24, and this traverse groove traverses the yarn 20 at a predetermined width. With the above configuration, the winding unit 8 winds the yarn 20 around the winding bobbin 22 while traversing it, thereby forming the package 30.

[0041] The winding unit 2 includes various devices along the yarn path from the yarn supplying section 6 to the winding section 8 via the yarn storage section 18. Specifically, the winding unit 2 includes, in order from the upstream side to the downstream side, an unwinding assisting device 10, a lower yarn feeler 11, a tension applying section 12, a first catching section 13, a second catching section 14, a yarn joining device 15, a cutter 16, and a clearer 17.

[0042] The unwinding assist device 10 includes a regulating member that can fit over the core tube of the yarn supplying bobbin 21. The regulating member is a generally cylindrical member that is positioned so as to come into contact with a balloon formed above the yarn layer of the yarn supplying bobbin 21. The balloon is the portion where the yarn 20 unwound from the yarn supplying bobbin 21 is swung around by centrifugal force. By bringing the regulating member into contact with the balloon, tension is applied to the yarn 20 that constitutes the balloon, preventing the yarn 20 from being swung around excessively. This allows the yarn 20 to be properly unwound from the yarn supplying bobbin 21.

[0043] The lower thread feeler 11 is disposed downstream of the unwinding assist device 10. The lower thread feeler 11 is a non-contact sensor, and detects whether or not the yarn 20 is present downstream of the unwinding assist device 10 and upstream of the tension applying unit 12 based on detection by a photoelectric sensor.

[0044] The tension applying unit 12 applies tension to the yarn 20. In this embodiment, the tension applying unit 12 is a gate type in which movable comb teeth are arranged relative to fixed comb teeth, and a predetermined tension is applied by running the yarn 20 between the comb teeth. The movable comb teeth are configured to be movable, for example, by a solenoid, so that the comb teeth are in an engaged or disengaged state. This makes it possible to adjust the tension applied to the yarn 20. However, the configuration of the tension applying unit 12 is not limited to this, and it may also be, for example, a disk-type tension applying unit.

[0045] The first catching section 13 and the second catching section 14 are arranged downstream of the tension applying section 12 and upstream of the yarn joining device 15. The first catching section 13 and the second catching section 14 are cylindrical members. The first catching section 13 and the second catching section 14 are each connected to a negative pressure source such as a blower, and can generate a suction flow. With this configuration, the first catching section 13 and the second catching section 14 can suction and catch the yarn 20.

[0046] When the yarn 20 is broken between the yarn supplying section 6 and the yarn storage section 18, the first catching section 13 catches the yarn 20 on the yarn storage section 18 side. Below, we will explain the operation of the winding unit 2 to make the first catching section 13 catch the yarn 20 on the yarn storage section 18 side. As shown in FIG. 2, a downstream yarn blowing off section 38 is disposed at a position opposite the upstream end of the yarn storage roller 32. The downstream yarn blowing off section 38 blows compressed air to send the yarn 20 on the yarn storage section 18 side to the vicinity of the opening of the first catching section 13.

[0047] Specifically, the downstream yarn blowing off section 38 is provided with a thin, tubular guide member through which the yarn 20 can pass, with an outlet for the yarn 20 formed at one end. A curved, tubular yarn guide member 39 is provided adjacent to the outlet of the downstream yarn blowing off section 38. An opening is formed at each end of the yarn guide member 39 in the longitudinal direction. The opening at one end of the yarn guide member 39 faces the outlet of the downstream yarn blowing off section 38, and the opening at the other end faces the opening of the first catching section 13. A guide path is formed inside the yarn guide member 39, connecting the openings at both ends.

[0048] If the yarn 20 breaks between the yarn supplying section 6 and the yarn storage section 18, the downstream yarn blowing off section 38 captures the yarn 20 on the yarn storage section 18 side and blows it into the guide path of the yarn guiding member 39. The first catching section 13 captures the yarn 20 guided by the yarn guiding member 39. The yarn guiding member 39 has a through-slit (not shown) formed along its entire length, so that the first catching section 13 can pull the yarn 20 from inside to outside the yarn guiding member 39 by pulling the yarn 20. In this way, the first catching section 13 captures the yarn 20 on the yarn storage section 18 side.

[0049] The second catching unit 14 can change its position at least between a catching position and a guiding position by rotating about its axis. At the catching position, the opening of the second catching unit 14 faces the yarn 20 located downstream of the unwinding assist device 10 and upstream of the yarn joining device 15 (specifically, upstream of the tension applying unit 12). If the yarn 20 is broken between the yarn supplying unit 6 and the yarn storage unit 18, the second catching unit 14 catches the yarn 20 on the yarn supplying unit 6 side. Thereafter, the second catching unit 14 moves to the catching position, and the caught yarn 20 is guided to the yarn joining device 15.

[0050] Here, immediately after a new yarn supplying bobbin 21 is supplied to the yarn supplying section 6, the yarn 20 has not been sufficiently pulled out from the yarn supplying bobbin 21, and therefore the second catching section 14 cannot catch the yarn 20 on the yarn supplying section 6 side. Taking this into consideration, the yarn supplying section 6 of the winding unit 2 is provided with an upstream yarn blowing off section 28. The upstream yarn blowing off section 28 blows compressed air into the hollow tray 26 and the yarn supplying bobbin 21. As a result, the yarn 20 on the yarn supplying bobbin 21 is blown off toward the second catching section 14 side. As described above, even when a new yarn supplying bobbin 21 is supplied to the yarn supplying section 6, the second catching section 14 can catch the yarn 20 on the yarn supplying section 6 side.

[0051] The second capturing part 14 that can rotate up and down is just an example, and instead of the second capturing part 14 of this embodiment, a second capturing part that is arranged downstream of the yarn joining device 15 and is non-rotatable may be provided.

[0052] When the yarn 20 is broken between the yarn supplying unit 6 and the yarn storage unit 18, the yarn splicing device 15 splices the yarn 20 on the yarn supplying unit 6 side and the yarn 20 on the yarn storage unit 18 side. Splicing involves untwisting the ends of two yarns 20, overlapping them, and then twisting them to join the two yarns 20. The yarn splicing device 15 is configured to use a fluid such as compressed air, or is mechanically configured.

[0053] The clearer 17 detects yarn defects such as slub or foreign matter contamination by monitoring the thickness and other characteristics of the yarn 20 with an appropriate sensor. A cutter 16 is disposed immediately upstream of the clearer 17, and cuts the yarn 20 when the clearer 17 detects a yarn defect.

[0054] Next, the material that constitutes the yarn pooling roller 32 will be described with reference to FIG.

[0055] Materials constituting the yarn storage roller 32 of this embodiment (hereinafter referred to as constituent materials) include nylon, ABS resin, and glass fiber. Nylon is a resin whose main chain is composed of repeated amide bonds and is sometimes called polyamide. ABS resin is a resin obtained by copolymerizing acrylonitrile, butadiene, and styrene. The composition ratio of the three resins constituting ABS resin is not particularly limited. Glass fiber is a material made of glass in a fibrous form. Glass fiber may be short fiber or long fiber. Glass fiber is used as an additive or filler.

[0056] The composition ratio of nylon, ABS resin, and glass fiber is not particularly limited. For example, the total of nylon and ABS resin is 30% by mass or more and 80% by mass or less. For example, the glass fiber is 20% by mass or more and 40% by mass or less. The yarn storage roller 32 may contain other constituent materials (e.g., additives, fillers, or colorants) than nylon, ABS resin, and glass fiber.

[0057] In this embodiment, a plated layer is formed on most of the surface of the yarn storage roller 32. The plated layer is metallic and electrically conductive. Therefore, by electrically connecting the plated layer to a reference potential point (e.g., a grounded point), the amount of charge on the yarn 20 and the yarn storage roller 32 can be reduced. Furthermore, by performing a finishing process such as buffing on the plated surface, the surface roughness can be adjusted to facilitate sliding of the yarn 20 from the base end to the tip end.

[0058] FIG. 3 shows a table showing the results of an experiment in which various properties were evaluated for various yarn storage rollers 32 made from different materials. The table in FIG. 3 lists the materials used in the experiment for the yarn storage roller 32, dividing them into base materials and additives. The base materials are PA (polyamide), PET (polyethylene terephthalate), PBT (polybutylene terephthalate), LCP (liquid crystal polymer), PPS (polyphenylene sulfide), ASA (acrylonitrile styrene acrylate), or combinations thereof. Glass, inorganic filler, or glass fiber is used as the additive. When the mass percentage of the additive can be determined, the mass percentage of the additive is listed.

[0059] The properties evaluated were tensile strength, bending strength, cost, surface roughness after plating, and adhesion of the plating layer. Each property was evaluated on a three-point scale of A, B, and C, taking into account the properties required of the yarn storage roller 32. A was the highest rating, and C was the lowest rating.

[0060] The tensile strength refers to the resistance to a tensile load. Specifically, the tensile load when a tensile load is applied to a material and the material breaks is the tensile strength. The bending strength refers to the resistance to a bending load. Specifically, the bending load when a bending load is applied to a material and the material breaks is the bending strength. The cost refers to the cost of the material itself, in other words, the manufacturing cost of the yarn storage roller 32.

[0061] The surface roughness after plating refers to the surface roughness after the plating layer is formed. When measuring the surface roughness, the constituent metals of the plating layer formed on each material are the same. However, when the materials are different, the state of the plating layer differs, and therefore the surface roughness also differs. There is an appropriate range for the surface roughness of the outer surface of the yarn pooling roller 32. For example, if the surface roughness is too large, the yarn does not slide properly and becomes difficult to pool. On the other hand, if the surface roughness is too small, the resistance when the yarn 20 wound on the outer surface of the yarn pooling roller 32 moves along the axial direction becomes too small, making it more likely that the yarn 20 will come off the tip end of the yarn pooling roller 32 en masse. Therefore, it is preferable that the surface roughness after plating be within a predetermined range. Surface roughness can be measured using known tests.

[0062] The adhesion of the plating layer is the resistance to peeling of the plating layer. When measuring the adhesion of the plating layer, the constituent metals of the plating layer formed on each material are the same. However, when the materials are different, the state of the plating layer differs, and therefore the resistance to peeling of the plating layer also differs. Here, if the adhesion of the plating layer is low, the plating layer will be more likely to peel when rubbed by thread 20, for example. Therefore, it is preferable that the adhesion of the plating layer is high. The adhesion of the plating layer can be detected by a known peeling test.

[0063] 3, the only material that received an A rating for all evaluation items in this experiment was the material of this embodiment, surrounded by the chain line. Therefore, by including nylon, ABS resin, and glass fiber as the constituent materials of the yarn pooling roller 32, as in this embodiment, the yarn pooling roller 32 can exhibit high performance.

[0064] Next, the external structure and mounting structure of the yarn pooling roller 32 will be described with reference to Figures 4 and 5. In the following description, the axial direction of the yarn pooling roller 32 will be simply referred to as the "axial direction." Also, in Figure 5 and subsequent figures, the ring member 33 will not be shown.

[0065] 4, the yarn storage roller 32 includes a main body 40, a base flange 41, and a tip flange 42. The main body 40 is a circular section with a constant diameter. The yarn 20 stored in the yarn storage section 18 is mainly wound around the main body 40.

[0066] The base end flange portion 41 is located closer to the base end than the main body portion 40 and has a larger diameter than the main body portion 40. As shown in Fig. 5, the base end flange portion 41 has an attachment protrusion 41a.

[0067] The attachment protrusion 41a is formed on the end surface on the base end side of the base end flange portion 41 and is a portion that protrudes further toward the base end from the end surface. The attachment protrusion 41a is formed on the radially outermost portion of the base end flange portion 41. The attachment protrusion 41a is an annular member that follows the outer circumferential circle of the base end flange portion 41. The central axis of the attachment protrusion 41a coincides with the central axis of the yarn storage roller 32.

[0068] As shown in FIG. 4, the yarn storage roller 32 is rotatably mounted on a roller support part 60. The roller support part 60 includes a support body 61 to which the yarn storage roller 32 is mounted and which supports the yarn storage roller 32. A circular or arc-shaped mounting groove 62 is formed in the support body 61. The depth direction of the mounting groove 62 coincides with the axial direction. The diameter of the mounting groove 62 coincides with the diameter of the mounting protrusion 41a. The mounting protrusion 41a fits into the mounting groove 62. The mounting protrusion 41a is slidable along the mounting groove 62. This configuration makes it difficult for the yarn 20 to get inside the yarn storage roller 32 in the radial direction.

[0069] As shown in Fig. 4, the wall 62a that forms the radially outer side of the mounting groove 62 is not formed over the entire circumferential direction. More specifically, there is an area on the front side of the device (in other words, the side where the yarn path is located) where the wall 62a is not formed. This eliminates or lowers the wall 62a in areas where fluff is likely to accumulate, making it difficult for fluff to enter the mounting groove 62. Note that the wall 62a may be formed over the entire circumferential direction.

[0070] The diameter of the main body 40 is preferably 140 mm or more and 160 mm or less. The resin material of this embodiment has a lower specific gravity than aluminum, which is the material of a typical yarn pooling roller 32. Therefore, the moment of inertia can be reduced compared to an aluminum yarn pooling roller 32 of the same size. As a result, the power consumption of the motor 34 can be reduced, and the performance required of the motor 34 can be kept low.

[0071] The tip flange portion 42 is located closer to the tip side than the main body portion 40 and has a larger diameter than the main body portion 40. As shown in Fig. 5, the tip flange portion 42 has a first outer surface 42a and a second outer surface 42b.

[0072] The first outer surface 42a is a surface connected to the tip side of the main body 40. The first outer surface 42a is an inclined surface so that the diameter increases toward the tip side. As shown in FIG. 5, in a cross section cut along a plane parallel to the axial direction, the angle between the first outer surface 42a and the axial direction is referred to as angle α. The angle α is preferably between 40 degrees and 50 degrees. This makes it difficult for the ring member 33 to move beyond the first outer surface 42a toward the tip side.

[0073] The second outer surface 42b is a surface connected to the tip side of the first outer surface 42a. The second outer surface 42b is an inclined surface so that its diameter decreases toward the tip side. As shown in FIG. 5, in a cross section cut along a plane parallel to the axial direction, the angle between the second outer surface 42b and the axial direction is referred to as angle β. The angle β is preferably between 5 degrees and 15 degrees. This allows the diameter of the tip of the yarn storage roller 32 to be reduced, thereby keeping the unwinding tension of the yarn 20 low.

[0074] The outer shape of the yarn pooling roller 32 is an example, and for example, at least one of the base flange portion 41 and the tip flange portion 42 may not be formed. Also, the mounting protrusion 41a of the base flange portion 41 may be omitted, or the second outer surface 42b of the tip flange portion 42 may be omitted.

[0075] A plating layer 50 is formed on the outer surfaces of the main body 40, the base flange 41, and the tip flange 42. As shown in FIG.

[0076] The lower layer 51 is formed on the surface of the material (a mixture of nylon, ABS resin, and glass fiber) constituting the yarn storage roller 32. The lower layer 51 is copper-plated. The surface layer 52 is formed on the surface of the lower layer 51. The surface layer 52 is nickel-plated. Nickel plating is superior to copper plating in terms of abrasion resistance. However, nickel plating is more expensive than copper plating. Therefore, by plating the lower layer 51 with copper and the surface layer 52 with nickel, the properties of nickel plating can be utilized while reducing overall costs. Note that the type of nickel plating is not particularly limited, but electroless nickel plating is preferable considering that it is formed on resin and that the coating can be made uniform. However, the types of plating for the lower layer 51 and the surface layer 52 are not limited to the examples given in this embodiment and can be changed as appropriate. Furthermore, the plating layer is not limited to multi-layer and may be single-layer.

[0077] Next, the internal structure of the base end side of the yarn pooling roller 32 will be described with reference to FIGS.

[0078] As shown in Fig. 5, the internal space of the yarn pooling roller 32 is divided into a base end side and a tip end side. A part of the motor 34 is located in the internal space on the base end side of the yarn pooling roller 32. As shown in Figs. 5 and 6, the internal space on the base end side of the yarn pooling roller 32 is surrounded by a base end inner bottom surface 43, a base end inner side surface 44, and a support body 61.

[0079] The base end inner bottom surface 43 corresponds to the inner bottom surface of the base end side internal space. The base end inner bottom surface 43 is a substantially circular surface with an opening formed in the center. A shaft mounting portion 71 is inserted into the opening of the base end inner bottom surface 43. The shaft mounting portion 71 is a component attached to the output shaft of the motor 34. The shaft mounting portion 71 rotates integrally with the output shaft of the motor 34. Because a strong force is continuously applied to the shaft mounting portion 71, the shaft mounting portion 71 is made of metal. Here, the yarn pooling roller 32 of this embodiment is integrally molded using a mold. The shaft mounting portion 71 is molded integrally with other parts (such as the main body 40) using insert molding. This eliminates the need to attach the shaft mounting portion 71. Note that insert molding of the shaft mounting portion 71 is one example. As another example, the shaft mounting portion 71 may be molded separately and then attached to the main body 40 after the yarn pooling roller 32 is integrally molded.

[0080] The base end inner surface 44 is an annular surface. In this embodiment, the plating layer 50 is not formed on the base end inner bottom surface 43 and the base end inner surface 44. This is because the base end inner bottom surface 43 and the base end inner surface 44 are not included in the path from the thread 20 to the reference potential point (described in detail later). In this way, by omitting the plating layer 50 in unnecessary locations, the cost associated with the plating layer 50 can be reduced. Note that the plating layer 50 may be formed on the base end inner bottom surface 43 and the base end inner surface 44.

[0081] Furthermore, a magnet (not shown) for detecting the rotational position of the yarn pooling roller 32 is disposed in the internal space on the base end side of the yarn pooling roller 32. Meanwhile, a magnetic sensor (not shown) is disposed at a predetermined position on the roller support part 60. The magnetic sensor detects that the magnet has approached. The detection result of the magnetic sensor is output to the control unit 25. Based on the detection result of the magnetic sensor, the control unit 25 can determine that the rotational position of the yarn pooling roller 32 has been aligned with a predetermined position.

[0082] Next, the internal structure of the tip end side of the yarn pooling roller 32 will be described with reference to FIG.

[0083] As shown in FIG. 7, the internal space on the tip side of the yarn pooling roller 32 is surrounded by a tip inner bottom surface 46, a tip inner side surface 47, and a lid portion 80.

[0084] The tip inner bottom surface 46 corresponds to the inner bottom surface of the tip-side internal space. The tip inner bottom surface 46 is a substantially circular surface with an opening formed in the center. The output shaft of the motor 34 and the shaft mounting portion 71 are located in the space connecting the opening of the base inner bottom surface 43 and the opening of the tip inner bottom surface 46. The tip inner surface 47 is an annular surface. In this embodiment, a plating layer 50 is formed on the tip inner bottom surface 46 and the tip inner surface 47. An electric charge transmitted to the outer peripheral surface of the yarn storage roller 32 via the yarn 20 moves via the plating layer 50 formed on the outer peripheral surface to the plating layer 50 formed on the tip inner surface 47 and then to the plating layer 50 formed on the tip inner bottom surface 46.

[0085] In addition, a charge removal member 72 is attached to the tip inner bottom surface 46. The charge removal member 72 is made of metal. The charge removal member 72 has a disk-shaped portion attached to the motor 34 and a portion pressed against the tip inner bottom surface 46 by a leaf spring structure. With this configuration, the charge that has moved to the plating layer 50 formed on the tip inner bottom surface 46 moves to the motor 34 via the shaft attachment portion 71.

[0086] Here, the motor 34 is connected to a reference potential (e.g., 0 V). That is, in this embodiment, the motor 34 corresponds to the reference potential point. With the above configuration, the charge transmitted to the outer peripheral surface of the yarn storage roller 32 via the yarn 20 can be removed (moved to the reference potential point). Note that it is sufficient that the plated layer 50 is formed so as to connect the outer peripheral surface of the yarn storage roller 32 to the reference potential point, and the location where the plated layer 50 is formed in this embodiment is one example. Furthermore, the reference potential point is not limited to the motor 34, and may be another location (e.g., a location electrically connected to the frame).

[0087] A pair of mounting bases 73 are provided in the internal space on the tip side of the yarn storage roller 32. The mounting bases 73 are integrally formed together with the main body 40 and the like using a mold. A first member 74 is attached to one of the mounting bases 73. An adjustment member 75 is attached to the other mounting base 73.

[0088] The first member 74 includes a groove cover 74a and a biasing member 74b. A slide groove 49 is formed along the axial direction on the outer peripheral surface of the yarn storage roller 32. The longitudinal direction of the slide groove 49 is parallel to the axial direction, the width direction of the slide groove 49 is parallel to the circumferential direction, and the depth direction of the slide groove 49 is parallel to the radial direction.

[0089] The groove cover 74a is disposed so as to penetrate the inside and outside of the yarn storage roller 32. The groove cover 74a is disposed at a position in the axial direction corresponding to the attachment position of the ring member 33. The shape of the portion of the groove cover 74a located outside the yarn storage roller 32 corresponds to the shape of the slide groove 49. In detail, the width of the groove cover 74a is the same as the width of the slide groove 49, and the thickness of the groove cover 74a is the same as the depth of the slide groove 49.

[0090] The biasing member 74b applies a biasing force to the groove cover 74a. By receiving the biasing force from the biasing member 74b, the groove cover 74a is positioned so as to fit along the outer peripheral surface of the yarn storage roller 32. In this state, there is no radial step between the groove cover 74a and the outer peripheral surface of the yarn storage roller 32. Meanwhile, a threading member (not shown) presses the groove cover 74a, causing the groove cover 74a to sink into the slide groove 49. This creates a gap between the outer peripheral surface of the yarn storage roller 32 and the ring member 33, allowing the yarn 20 to be passed through the gap. In other words, the first member 74 is a member that assists in attaching the yarn 20 to the yarn storage roller 32 when winding of the yarn 20 onto the yarn storage roller 32 begins.

[0091] Only one first member 74 is disposed in the internal space on the tip side of the yarn storage roller 32. Therefore, the center of gravity of the yarn storage roller 32 may be shifted from the axis position by the weight of the first member 74. If the center of gravity of the yarn storage roller 32 is not balanced, the yarn storage roller 32 will not rotate stably. Taking this into consideration, in this embodiment, an adjustment member 75 is disposed on the other mounting base 73.

[0092] The adjustment member 75 is a member for moving the center of gravity of the yarn storage roller 32 closer to the axial position. The adjustment member 75 is made of, for example, metal, but may also be made of resin. By placing the adjustment member 75, the center of gravity of the yarn storage roller 32 moves closer to the axial position, allowing the yarn storage roller 32 to rotate stably. The adjustment member 75 is a member whose only purpose is to adjust the center of gravity position and has no other function. The mounting base 73 for attaching the adjustment member 75 may be omitted.

[0093] In this embodiment, the adjustment member 75 adjusts the center of gravity position in relation to the first member 74, which assists in attaching the yarn 20 to the yarn pooling roller 32. Note that a member having another function may be disposed as the first member 74. In other words, the adjustment member 75 can be used as a member for adjusting the center of gravity position in relation to various members.

[0094] Next, the lid portion 80 and its mounting structure will be described with reference to FIGS.

[0095] 7, grooves 48 are formed in the tip inner surface 47 near the end on the tip side. The grooves 48 are formed in two opposing regions when the tip inner surface 47 is divided into four equal parts in the circumferential direction. In particular, it is preferable that the grooves 48 are formed in two regions where the first member 74 and the adjustment member 75 are not present. The grooves 48 are recessed in the radial direction.

[0096] Furthermore, on the end surface on the tip side of the yarn storage roller 32 (tip flange portion 42), a mark 32a is formed at a position corresponding to the boundary when the end surface is divided into four equal parts in the circumferential direction. The mark 32a is, for example, a groove, but may have another shape, such as a protrusion, as long as it is visible to the worker. Furthermore, the mark 32a is not limited to being uneven, and may be configured to have a color different from the other parts.

[0097] The lid portion 80 includes a disk-shaped lid body 81. The lid body 81 closes the internal space on the tip side of the yarn storage roller 32. As shown in FIG. 8, the lid body 81 is formed with a protrusion 82 and a notch 83. The protrusion 82 is formed along the outer periphery of the lid body 81. The protrusions 82 are formed in two opposing regions when the lid body 81 is divided into four equal parts in the circumferential direction. The notches 83 are formed at positions corresponding to the boundaries when the edge portion (the outer end portion in the radial direction) of the lid body 81 is divided into four equal parts in the circumferential direction.

[0098] When attaching the lid portion 80 to the yarn storage roller 32, the worker aligns the lid portion 80 with the end of the tip side of the yarn storage roller 32 and rotates the lid portion 80 around its axial direction. This causes the groove 48 of the yarn storage roller 32 to fit into the convex portion 82 of the lid portion 80. After the groove 48 fits into the convex portion 82, the worker rotates the lid portion 80 until the mark 32a of the yarn storage roller 32 becomes visible through the notch 83 of the lid portion 80 (until the positional relationship shown in FIG. 9 is achieved). This allows the worker to attach the lid portion 80 so that the groove 48 fits sufficiently into the convex portion 82. Note that a protrusion (in other words, a first attachment portion) may be provided on the yarn storage roller 32, and a groove (in other words, a second attachment portion) may be provided on the lid portion 80.

[0099] In this embodiment, four marks 32a and four notches 83 are provided, but a different number (for example, two) may be provided. Furthermore, if the lid portion 80 is smaller than the end face of the tip flange portion 42, the notches 83 may be omitted and a mark may be formed on the lid portion 80 side as well. In this case, the operator adjusts the rotational position of the lid portion 80 until the mark on the tip flange portion 42 side and the mark on the lid portion 80 side are aligned.

[0100] As described above, the automatic winder 1 of this embodiment includes a yarn supplying unit 6, a yarn storage unit 18, and a winding unit 8. The yarn supplying unit 6 is capable of supplying the yarn 20. The yarn storage unit 18 pulls out the yarn 20 from the yarn supplying unit 6 and stores the pulled-out yarn 20. The winding unit 8 winds the yarn 20 stored in the yarn storage unit 18 to form a package 30. The yarn storage unit 18 has a yarn storage roller 32 that, when rotated, winds the yarn 20 pulled out from the yarn supplying unit 6 around its outer circumferential surface and stores it. The yarn storage roller 32 is made of materials including nylon, ABS resin, and glass fiber, and has a plating layer 50 formed on at least its outer circumferential surface.

[0101] The yarn pooling roller 32 made of the above-mentioned material has excellent tensile strength, bending strength, raw material cost, and suitability for plating. Therefore, a yarn winding machine equipped with a high-quality yarn pooling roller 32 can be realized.

[0102] In the automatic winder 1 of this embodiment, the plated layer 50 has a lower layer 51 and a surface layer 52 formed on the outer surface of the lower layer 51. The surface layer 52 is nickel plated.

[0103] By forming the surface layer 52 with nickel plating, it is possible to realize a yarn storage roller 32 with excellent surface characteristics. Furthermore, by adopting a multilayer structure consisting of the surface layer 52 and the lower layer 51, costs can be reduced compared to when only nickel plating is used.

[0104] In the automatic winder 1 of this embodiment, the diameter of the yarn storage roller 32 is 140 mm or more and 160 mm or less.

[0105] This reduces the moment of inertia compared to when a metal yarn pooling roller 32 with the same diameter is used, thereby reducing the power consumption of the motor 34 that drives the yarn pooling roller 32.

[0106] In the automatic winder 1 of this embodiment, the yarn storage unit 18 includes a roller support 60 that supports the axial end of the yarn storage roller 32. An annular attachment protrusion 41a that protrudes in the axial direction is formed on the axial end of the yarn storage roller 32. The roller support 60 is formed with an attachment groove 62 into which the attachment protrusion 41a fits.

[0107] This makes it more difficult for the yarn 20 to get inside the yarn pooling roller 32 compared to a configuration in which the attachment protrusion 41a and attachment groove 62 are not formed.

[0108] The automatic winder 1 of this embodiment includes a charge removing member 72 arranged so as to be in contact with the motor 34 provided in the yarn storage section 18 and so as to be in contact with the plated layer 50.

[0109] This allows the charge transferred from the yarn 20 to be removed.

[0110] The automatic winder 1 of this embodiment includes a motor that rotates and drives the yarn pooling roller 32. A metal shaft mounting portion 71 for mounting the output shaft of the motor is inserted into the yarn pooling roller 32.

[0111] As a result, by constructing the main parts of the yarn pooling roller 32 from a resin material while using metal for the parts that require high strength, the weight of the yarn pooling roller 32 can be reduced while ensuring its functionality.

[0112] In the automatic winder 1 of this embodiment, a first member 74 is disposed at a position different from the axial position of the yarn pooling roller 32. On the opposite side of the axial position to the first member 74, an adjustment member 75 for adjusting the position of the center of gravity of the yarn pooling roller 32 is disposed instead of the first member 74.

[0113] This allows the position of the center of gravity of the yarn pooling roller 32 to be closer to the shaft position.

[0114] In the automatic winder 1 of this embodiment, a space is formed inside the outer peripheral surface of the yarn pooling roller 32, and a lid portion 80 that closes the space is arranged.

[0115] This makes it possible to prevent the accumulation of fly lint in the space inside the yarn storage roller 32.

[0116] The preferred embodiment of the present invention has been described above, but the above configuration can be modified, for example, as follows. Each modification may be made alone, or multiple modifications may be made in any combination.

[0117] The shape and configuration of the yarn pooling roller 32 in the above embodiment are merely examples and can be modified. For example, the charge removing member 72, the first member 74, the adjustment member 75, or the lid portion 80 may be omitted.

[0118] The yarn pooling roller 32 of the above embodiment is made of the same material for the portions other than the shaft mounting portion 71. Alternatively, metal may be used for the portions other than the shaft mounting portion 71.

[0119] The present invention is not limited to the automatic winder 1, but can also be applied to other yarn winding machines that wind a yarn to form a package. [Explanation of symbols]

[0120] 1 Automatic winder (yarn winding machine) 8 Winding section 18 Thread storage section 32 Yarn storage roller 50 plating layers

Claims

1. a yarn supplying unit capable of supplying yarn; a yarn storage section that pulls out the yarn from the yarn supplying section and stores the pulled-out yarn; a winding section that winds the yarn stored in the yarn storage section to form a package; Equipped with the yarn storage unit has a yarn storage roller that is rotationally driven to wind the yarn pulled out from the yarn supplying unit around an outer peripheral surface thereof and store the yarn, The yarn winding machine is characterized in that the yarn pooling roller is made of a material including nylon, ABS resin, and glass fiber, and has a plating layer formed on at least the outer peripheral surface.

2. The yarn winding machine according to claim 1, the plating layer has a lower layer and a surface layer formed on an outer surface of the lower layer, The yarn winding machine is characterized in that the surface layer is nickel plated.

3. The yarn winding machine according to claim 1 or 2, The yarn winding machine, wherein the diameter of the yarn storage roller is 140 mm or more and 160 mm or less.

4. The yarn winding machine according to any one of claims 1 to 3, the yarn pooling section includes a roller support section that supports an axial end of the yarn pooling roller, an annular attachment protrusion protruding in the axial direction is formed on an axial end of the yarn storage roller; The yarn winding machine is characterized in that the roller support portion is formed with an attachment groove into which the attachment protrusion fits.

5. The yarn winding machine according to any one of claims 1 to 4, a neutralizing member disposed so as to contact a reference potential point provided in the yarn storage section and so as to contact the plating layer;

6. The yarn winding machine according to any one of claims 1 to 5, a motor that rotates the yarn pooling roller; a metal shaft mounting portion for mounting the output shaft of the motor thereto is inserted into the yarn storage roller.

7. The yarn winding machine according to any one of claims 1 to 6, a first member is disposed at a position different from the axial position of the yarn pooling roller, a yarn winding machine, characterized in that an adjustment member for adjusting the position of the center of gravity of the yarn storage roller is arranged on the opposite side of the shaft position from the first member, instead of the first member.

8. The yarn winding machine according to any one of claims 1 to 7, The yarn winding machine is characterized in that a space is formed inside the outer peripheral surface of the yarn storage roller, and a lid portion is disposed to close the space.

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