JP2016037354A - Traverse arm and yarn winding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traverse arm which prevents a yarn from getting caught while inhibiting wear caused by touch with the yarn, and to provide a yarn winding machine.SOLUTION: A traverse arm 30 includes a body part 31 having a yarn guide part 35 for guiding a yarn Y. A surface layer 44 having higher hardness than the body part 31 is formed on a surface 31a of the body part 31, which includes at least the yarn guide part 35, by surface treatment.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a traverse arm and a yarn winder.

  The yarn winding machine includes a traverse device for traversing (twisting) the yarn wound around the winding bobbin. For example, Patent Document 1 discloses an arm-type traverse device including a traverse arm that reciprocally swivels as a traverse device. The traverse arm is provided with a traverse guide for guiding the yarn at the tip of the arm body.

JP 2014-69931 A

  Since the traverse guide contacts the yarn, it may be worn by use. Therefore, in the traverse guide, a guide member made of a material having excellent wear resistance such as ceramics is disposed at a portion where the yarn comes into contact. The guide member is fixed to the traverse guide with an adhesive, for example. In such a configuration, for example, a gap may be generated between the traverse guide and the guide member depending on the bonding state, and a thread may be caught in the gap.

  An object of the present invention is to provide a traverse arm and a yarn winder that can prevent the yarn from being caught while suppressing wear due to contact with the yarn.

  A traverse arm according to one aspect of the present invention is a traverse arm that traverses a yarn by reciprocating swiveling motion, and includes a main body portion having a yarn guide portion for guiding the yarn, and at least the yarn guide of the main body portion. A surface layer having a hardness higher than that of the main body is formed on the surface including the portion by surface treatment.

  The traverse arm has a surface layer formed on the surface of the yarn guide portion. The surface layer has higher hardness than the main body. Thereby, in a traverse arm, abrasion resistance can be secured in the yarn guide portion. Since the traverse arm can ensure the wear resistance of the yarn guide portion by the surface layer, it is not necessary to provide another member having wear resistance on the main body portion. For this reason, the traverse arm is not formed with a gap or a step that may cause the yarn to be caught. Therefore, the thread can be prevented from being caught.

  In one embodiment, the surface layer may include at least one of diamond-like carbon, ceramic, titanium nitride, and hard chromium. By forming the surface layer with these materials, it is possible to ensure wear resistance.

  In one embodiment, the main body may be made of aluminum, aluminum alloy, magnesium, magnesium alloy, titanium, titanium alloy, or resin. Thereby, weight reduction of a traverse arm can be achieved. Therefore, it is possible to increase the speed of the reciprocating revolving motion of the traverse arm.

  In one embodiment, the surface layer may be formed directly on the surface of the main body. Thus, the traverse arm can be quantified by not providing the intermediate layer between the main body portion and the surface layer. In addition, since the process of forming the intermediate layer does not occur, the traverse arm can be manufactured more easily.

  In one embodiment, the surface layer may be formed on the entire body. When surface processing is performed on a part of the main body, for example, a masking operation or the like is generated, which complicates the process. When the surface layer is formed on the entire main body, masking work or the like does not occur, so that the manufacturing can be simplified.

  In one embodiment, the thread guide part may be a notch groove formed in the main body part. Thus, by forming the yarn guide portion by the notch groove, a gap or a step where the yarn is caught is not formed. Therefore, the yarn can be further prevented from being caught.

  A yarn winding machine according to another aspect of the present invention includes a traverse arm, a drive unit that reciprocally turns the traverse arm, and a winding unit that winds the yarn traversed by the reciprocating rotation of the traverse arm into a package. And comprising.

  This yarn winding machine includes the traverse arm. Thereby, when the traverse arm traverses the yarn by driving the drive unit, it is possible to prevent the yarn from being caught by the traverse arm. As a result, the quality of the yarn wound around the package can be maintained.

  In one embodiment, the traverse arm may be fixed to the drive shaft of the drive unit. As described above, when the traverse arm is fixed to the drive shaft without a gear or the like, the drive of the drive unit is directly transmitted to the traverse arm, so that the traverse arm can be driven with high accuracy.

  According to the present invention, it is possible to prevent the yarn from being caught while suppressing wear due to contact with the yarn.

It is a front view of an automatic winder provided with the winder unit concerning one embodiment. It is a front view which shows a winder unit typically. It is a side view which shows a traverse apparatus. It is a figure which shows a traverse arm. It is a figure which shows an arm main body. It is a figure which shows the cross-sectional structure along the VI-VI line in FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

  With reference to FIG. 1, the whole structure of the automatic winder 1 provided with the winder unit (yarn winding machine) 2 of this embodiment is demonstrated. In the following description, “upstream” and “downstream” mean upstream and downstream in the traveling direction of the yarn Y when winding the yarn.

  As shown in FIG. 1, the automatic winder (yarn winding machine) 1 includes a plurality of winder units 2 arranged side by side and a machine base control device 4. The machine control device 4 controls (manages) the overall operation of the automatic winder 1. The automatic winder 1 may further include an automatic doffing device (not shown).

  As shown in FIG. 2, each winder unit 2 includes a winding unit main body 3 and a unit control unit 17 as main components.

  The unit controller 17 includes, for example, a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), an I / O port, and a communication port. A program for controlling each component of the winder unit 2 is recorded in the ROM. The I / O port and the communication port are connected to each part (details will be described later) included in the winder unit 2 and the machine base control device 4 so that control information and the like can be communicated. Thereby, the unit control part 17 can control operation | movement of each part with which the winder unit 2 is provided.

  The winding unit body 3 includes a yarn feeding section 5, a yarn unwinding assisting device 7, a tension applying device 9, a yarn monitoring device 11, and a yarn traveling path between the yarn feeding bobbin 6 and the contact roller 22. The splicer device 13 and the winding unit 15 are provided.

  A yarn supplying section 5 is provided at the lower part of the winder unit 2. The yarn supplying section 5 is configured so that the yarn supplying bobbin 6 conveyed by a bobbin conveying system (not shown) can be held at a predetermined position.

  The yarn unwinding assisting device 7 lowers the regulating member 8 covering the core pipe of the yarn supplying bobbin 6 in conjunction with the unwinding of the yarn Y from the yarn supplying bobbin 6, so that the yarn Y from the yarn supplying bobbin 6 is lowered. Assist with unraveling. The regulating member 8 contacts the balloon of the yarn Y formed on the upper portion of the yarn feeding bobbin 6 by the rotation and centrifugal force of the yarn Y unwound from the yarn feeding bobbin 6, and controls the balloon of the yarn Y to an appropriate size. This helps to unwind the yarn Y. A sensor (not shown) for detecting the chase portion of the yarn feeding bobbin 6 is provided in the vicinity of the regulating member 8. When this sensor detects the descent of the chase portion, the yarn unwinding assisting device 7 follows the descent of the chase portion and lowers the regulating member 8 by, for example, an air cylinder (not shown).

  The tension applying device 9 applies a predetermined tension to the traveling yarn Y. As the tension applying device 9, for example, a gate-type device in which movable comb teeth are arranged with respect to fixed comb teeth can be used. By allowing the yarn Y to pass while bending between the interdigitated comb teeth, resistance can be applied to the traveling yarn Y and appropriate tension can be applied. In addition to the gate type, for example, a disk type can be adopted as the tension applying device 9.

  The yarn monitoring device 11 includes an unillustrated sensor for detecting an abnormal portion (yarn defect) of the yarn Y. A cutter 12 for cutting the yarn Y immediately when the yarn monitoring device 11 detects a yarn defect is provided in the vicinity of the yarn monitoring device 11.

  The splicer device 13 includes a lower thread on the yarn feeding bobbin 6 and a winding when the yarn monitoring device 11 detects a yarn defect and performs yarn cutting, or when the yarn breaks during unwinding from the yarn feeding bobbin 6. The upper bobbin 14 side upper thread is spliced. As such a splicer device for splicing the upper yarn and the lower yarn, a mechanical knotter, a device using a fluid such as compressed air, or the like can be used.

  A lower thread catching member 16 that catches the lower thread and guides it to the splicer apparatus 13 is provided below the splicer apparatus 13. An upper thread catching member 18 that catches the upper thread and guides it to the splicer apparatus 13 is provided above the splicer apparatus 13.

  The winding unit 15 includes a cradle 20 that supports the winding bobbin 14 for winding the yarn Y, and a contact roller 22 that can rotate in contact with the circumferential surface of the winding bobbin 14. The winding unit 15 includes a rotation drive source (not shown) that rotationally drives the winding bobbin 14 supported by the cradle 20. By rotating the winding bobbin 14, the yarn Y can be wound around the outer periphery of the winding bobbin 14. The winding bobbin 14 with the yarn Y wound up in this way is referred to as a package P.

  The winder unit 2 includes an arm-type traverse device 24 in the vicinity of the cradle 20 for traversing (traversing) the yarn Y wound around the winding bobbin 14. As shown in FIG. 3, the traverse device 24 includes a traverse drive motor (drive unit) 26 and a traverse arm 30.

  The traverse drive motor 26 is a drive source for reciprocatingly turning the traverse arm 30 and is configured by a servo motor or the like. The traverse drive motor 26 has a turning drive shaft 28 as an output shaft. The turning drive shaft 28 is connected to the base end portion of the traverse arm 30 in the longitudinal direction. The traverse arm 30 is fixed so as not to rotate relative to the turning drive shaft 28. As shown in FIG. 3, in a state where the traverse arm 30 is fixed to the turning drive shaft 28, the longitudinal direction of the traverse arm 30 and the turning drive shaft 28 are substantially orthogonal to each other.

  A traverse guide 32 is provided at the distal end of the traverse arm 30 (the end opposite to the base end in the longitudinal direction). The traverse guide 32 is formed in a shape (a shape in which the yarn Y can be arranged inside or a shape in which the yarn Y can be hooked) that can guide the yarn Y that is wound around the winding bobbin 14.

  The traverse guide motor 32 reciprocates in the winding width direction of the package P (left and right direction in FIG. 2) by repeating forward and reverse rotation of the rotor of the traverse drive motor 26 and reciprocating the traverse arm 30. By rotating the winding bobbin 14 with the yarn Y guided by the traverse guide 32, the yarn Y is wound around the winding bobbin 14 while traversing, and a package P having a predetermined shape can be formed. .

  Next, the traverse arm 30 will be described in detail. As shown in FIGS. 4 and 5, the traverse arm 30 includes an arm main body (main body portion) 31 and an attachment member 33.

  As shown in FIG. 4, the arm body 31 is formed in a tapered shape. In the longitudinal direction of the arm main body 31, the side on which the turning drive shaft 28 is attached is referred to as “base end”, and the opposite side (side on which the traverse guide 32 is formed) is referred to as “tip”. The arm body 31 is formed by processing a plate member. In the present embodiment, the arm main body 31 is formed by pressing an aluminum or aluminum alloy plate. As a material for forming the arm body 31, magnesium, a magnesium alloy, titanium, a titanium alloy, a resin, or the like can be used.

  A traverse guide 32 is provided at the tip of the arm body 31. The traverse guide 32 and the arm body 31 are integrally formed. That is, the traverse guide 32 is formed together with the arm body 31 by pressing a plate of aluminum or aluminum alloy. The traverse guide 32 is formed in a shape capable of guiding the yarn Y. Specifically, the traverse guide 32 is formed in a bowl shape (hook shape).

  The traverse guide 32 is formed with a yarn guide portion 35 for guiding the yarn Y (hooking the yarn Y). The yarn guide portion 35 is a notch groove formed in the traverse guide 32. The yarn guide portion 35 extends along the longitudinal direction of the arm main body 31, and the proximal end side is open. The yarn Y traversed by the traverse device 24 travels while sliding while in contact with the yarn guide portion 35.

  The attachment member 33 is attached to the proximal end portion of the arm main body 31. The attachment member 33 is attached to the turning drive shaft 28. That is, the arm body 31 is fixed to the turning drive shaft 28 via the attachment member 33. The attachment member 33 is a separate member from the arm main body 31. The attachment member 33 is, for example, aluminum, and is formed by cutting, for example. An attachment hole 37 for attaching the turning drive shaft 28 is formed in the attachment member 33. A key groove 39 for preventing the traverse arm 30 from rotating relative to the turning drive shaft 28 is formed in the mounting hole 37.

  The arm body 31 and the attachment member 33 are fixed by, for example, screws. A plurality (three in this case) of insertion holes 41, 42, and 43 are formed in the arm main body 31, and screws are screwed into the attachment member 33 through the insertion holes 41, 42, and 43. Thereby, the attachment member 33 is attached to the arm main body 31.

  As shown in FIG. 6, a surface layer 44 is formed on the surface 31 a of the arm body 31 having the above configuration. In the present embodiment, the surface layer 44 is formed on the entire surface 31 a of the arm body 31 including the yarn guide portion 35. The surface layer 44 is formed by surface treatment. The surface treatment is a treatment applied to the surface 31a of the arm body 31 in order to improve the wear resistance and the like of the surface 31a of the arm body 31. Specifically, the surface treatment is, for example, a process of forming a film on the surface 31a of the arm body 31 or a process of modifying the surface 31a of the arm body 31.

  The surface layer 44 includes a first layer 45 and a second layer 46. The first layer 45 is formed directly on the surface 31 a of the arm body 31, and the second layer 46 is formed on the first layer 45. The first layer 45 is, for example, chromium plating. The first layer 45 may be a single layer or a multilayer. The component of the material of the first layer 45 may have a gradient composition.

  In the present embodiment, the second layer 46 is, for example, a DLC (Diamond Like Carbon) film, and is formed by plasma CVD. The arm body 31 is black due to the second layer 46 of DLC. The second layer 46 has higher hardness (Vickers hardness) than the arm body 31. In the present embodiment, since the arm body 31 is made of aluminum or an aluminum alloy, the hardness of the second layer 46 is higher than the hardness of the aluminum or aluminum alloy (for example, 50 Hv to 150 Hv). The hardness of the second layer 46 that is DLC is, for example, 1300 Hv or more and 1500 Hv or less. Although the thickness of the 2nd layer 46 should just be set suitably, it is 5 micrometers or more and 10 micrometers or less, for example.

  As described above, in the traverse arm 30 of this embodiment, the surface layer 44 is formed on the surface 31 a of the arm body 31 including the yarn guide portion 35 by the surface treatment. The second layer 46 of the surface layer 44 is harder than the arm body 31. Thereby, the traverse arm 30 can ensure wear resistance in the yarn guide portion 35. Since the traverse arm 30 can ensure the wear resistance of the yarn guide portion 35 by the surface layer 44, it is not necessary to provide other members on the traverse guide 32. Therefore, the traverse arm 30 is not formed with a gap or a step that may cause the yarn Y to be caught. Therefore, the yarn Y can be prevented from being caught.

  In the present embodiment, the second layer 46 of the surface layer 44 is a DLC film. Thus, by forming the DLC film on the surface 31 a of the arm body 31, it is possible to ensure wear resistance in the yarn guide portion 35.

  In the present embodiment, the arm body 31 is formed of aluminum or an aluminum alloy. Accordingly, it is possible to increase the speed of the reciprocating revolving motion of the traverse arm 30.

  In the present embodiment, the surface layer 44 is formed on the entire surface 31 a of the arm body 31. When surface processing is performed on a part of the arm main body 31, a masking operation or the like occurs, so that the process becomes complicated. If the surface layer 44 is formed on the entire surface 31a of the arm body 31, no masking operation or the like occurs, so that the manufacturing can be simplified. Further, if the surface layer 44 is formed on the entire surface 31a of the arm body 31, the surface layer 44 functions as a rust preventive (corrosion resistant layer), so that it is not necessary to separately perform a rust preventive (corrosion resistant) treatment on the traverse arm 30. .

  In the present embodiment, the yarn guide portion 35 is a notch groove formed in the traverse guide 32. Accordingly, no gap or step where the yarn Y is caught is not formed.

  In the present embodiment, the surface layer 44 includes the first layer 45. For example, the first layer 45 formed by chromium plating has good adhesion to the surface 31a of the arm body 31 formed of aluminum or an aluminum alloy, and the second layer 46 formed by DLC is the first layer. Good adhesion to 45. Therefore, by providing the first layer 45, it is possible to prevent the second layer 46 (surface layer 44) from peeling off.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the DLC film has been described as an example of the second layer 46 of the surface layer 44. The second layer 46 of the surface layer 44 only needs to be harder than the arm body 31, and may be formed of, for example, ceramic, titanium nitride, or hard chromium. Or you may form including several materials among DLC, ceramic, titanium nitride, and hard chromium.

  In the case of ceramic, a surface layer can be formed on the surface 31a of the arm body 31 by a plasma powder spray method or an explosive spraying method. The hardness of the ceramic can be, for example, 800 Hv or more and 850 Hv or less. The thickness of the ceramic surface layer can be, for example, 30 μm or more and 200 μm or less.

  In the case of titanium nitride, a surface layer can be formed on the surface 31a of the arm body 31 by the PVD ion plating method. The hardness of titanium nitride can be, for example, 2200 Hv or more and 2500 Hv or less. The thickness of the surface layer of titanium nitride can be, for example, 2 μm or more and 4 μm or less.

  In the case of hard chrome, a surface layer can be formed on the surface 31a of the arm body 31 by a plating bath. The hardness of the hard chrome can be, for example, 800 Hv or more and 1000 Hv or less.

  In the above embodiment, the configuration in which the surface layer 44 includes the first layer 45 and the second layer 46 has been described as an example. However, the first layer 45 may not be provided. That is, when the surface layer 44 is formed by only one layer of the second layer 46, the second layer 46 may be directly formed on the surface 31 a of the arm body 31. Thus, by not providing the first layer 45 between the surface 31a of the arm body 31 and the second layer 46, the traverse arm 30 can be measured. In addition, since the process of forming the first layer 45 does not occur, the traverse arm 30 can be manufactured more easily.

  In the above embodiment, the configuration in which the surface layer 44 includes the first layer 45 and the second layer 46 has been described as an example. However, the surface layer 44 may include other layers.

  In the embodiment described above, an example in which the surface layer 44 is formed on the entire surface 31a of the arm body 31 has been described as an example. However, the surface layer 44 only needs to be formed on at least the surface 31a of the yarn guide portion 35.

  DESCRIPTION OF SYMBOLS 2 ... Winder unit (yarn winding machine), 15 ... Winding part, 26 ... Traverse drive motor (drive part), 28 ... Turning drive shaft, 30 ... Traverse arm, 31 ... Arm body, 31a ... Surface, 35 ... Thread guide Part 44 ... surface layer 46 ... second layer (surface layer) P ... package.

Claims (8)

A traverse arm that traverses the yarn by reciprocating swiveling motion,
A main body having a yarn guide for guiding the yarn;
A traverse arm in which a surface layer having a hardness higher than that of the main body is formed by a surface treatment on a surface including at least the yarn guide portion of the main body.   The traverse arm according to claim 1, wherein the surface layer includes at least one of diamond-like carbon, ceramic, titanium nitride, and hard chromium.   The traverse arm according to claim 1, wherein the main body is formed of aluminum, an aluminum alloy, magnesium, a magnesium alloy, titanium, a titanium alloy, or a resin.   The traverse arm according to claim 1, wherein the surface layer is directly formed on the surface of the main body.   The traverse arm according to any one of claims 1 to 4, wherein the surface layer is formed on the entire main body.   The traverse arm according to claim 1, wherein the yarn guide portion is a notch groove formed in the main body portion. The traverse arm according to any one of claims 1 to 6,
A drive unit for reciprocatingly turning the traverse arm;
A yarn winding machine, comprising: a winding unit that winds the yarn traversed by the reciprocating turning motion of the traverse arm around a package.   The yarn winding machine according to claim 7, wherein the traverse arm is fixed to a drive shaft of the drive unit.

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