CN210176182U - Traverse arm, winding unit, and yarn winding machine - Google Patents

Abstract

The utility model relates to a horizontal movable arm, winding unit and yarn winder. The traversing arm guides the yarn. The traverse arm includes an arm main body. The arm body is formed by integrating a plurality of layers made of carbon fiber reinforced plastic including carbon fibers aligned in a fiber direction which is a predetermined linear direction. The plurality of layers are arranged in parallel in the thickness direction of the arm body. At least two of the plurality of layers have different fiber directions.

Description

Traverse arm, winding unit, and yarn winding machine

Technical Field

The present invention relates generally to a traverse arm for traversing a yarn in a yarn winding machine.

Background

Conventionally, as a traverse device provided in a yarn winding machine, an arm-type traverse device has been known which traverses (traverses) a yarn wound around a winding bobbin using a traverse arm driven to rotate reciprocally. Japanese patent application laid-open No. 2014-69931 discloses a traverse arm provided in such a traverse device.

The traverse arm disclosed in japanese patent application laid-open No. 2014-69931 includes an arm body formed of a plate-like member and a traverse guide provided at a distal end portion of the arm body, and is rotationally driven by a rotational drive shaft substantially orthogonal to a longitudinal direction of the arm body.

A traverse arm as disclosed in japanese patent application laid-open publication No. 2014-69931 holds a yarn at a thin tip end portion and is continuously rotated at a high speed by a motor.

Therefore, as a countermeasure against the bending or breaking of the tip portion, it is necessary to increase the strength of the traverse arm. On the other hand, in order to cope with the increase in winding speed, the traverse arm is required to be further lightweight.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a traverse arm which is light and has high strength.

As described above, means for solving the problem and effects thereof will be described below.

According to a first aspect of the present invention, there is provided a traverse arm having the following structure. That is, the traverse arm guides the yarn. The traverse arm includes an arm main body. The arm body is formed by integrating a plurality of layers made of carbon fiber reinforced plastic including carbon fibers aligned in a fiber direction which is a predetermined linear direction. The plurality of layers are stacked in a thickness direction of the arm main body. The fiber direction of at least two of the layers in the plurality of layers is different.

This makes it possible to easily realize a lightweight and strong boom. In addition, the transverse arm can have appropriate anisotropy in mechanical strength.

The traverse arm preferably has the following configuration. That is, the arm main body is formed to be elongated. The number of the layers stacked in the thickness direction of the arm main body is an odd number. The fiber direction of a layer located at the center among the stacked plurality of layers coincides with the width direction of the arm main body.

This can improve the strength of the arm body in the width direction.

The traverse arm preferably has the following configuration. That is, the plurality of layers includes a 1 st layer, a 2 nd layer, and a 3 rd layer. The 2 nd layer is laminated to the 1 st layer. The 3 rd layer is laminated to the 2 nd layer on the opposite side of the 1 st layer. The fiber direction of the 1 st layer and the fiber direction of the 3 rd layer are aligned with the longitudinal direction of the arm main body. The fiber direction of the 2 nd layer coincides with the width direction of the arm main body.

This ensures strength in the width direction of the arm body to some extent, and ensures high strength in the longitudinal direction.

The traverse arm preferably has the following configuration. That is, the plurality of layers further includes a 4 th layer and a 5 th layer. The 4 th layer is laminated to the 1 st layer on the opposite side of the 2 nd layer. The 5 th layer is laminated to the 3 rd layer on the opposite side of the 2 nd layer. In both the 4 th layer and the 5 th layer, the fiber direction thereof is inclined at an angle of 30 ° or more and 60 ° or less with respect to the fiber direction of the 1 st layer.

This ensures high strength in the longitudinal direction of the arm body, and also improves torsional rigidity.

In the traverse arm, it is preferable that an angle formed by the fiber direction of the 4 th layer and the fiber direction of the 1 st layer is 45 ° in both the 4 th layer and the 5 th layer.

This makes it possible to achieve a good balance between anisotropy of mechanical strength.

The traverse arm preferably has the following configuration. That is, the arm body is formed with a reinforcement portion formed of a convex portion or a concave portion, which is elongated in the longitudinal direction of the arm body. The arm main body has a portion that is bent (bent) in the longitudinal direction including the reinforcing portion.

This can further increase the strength of the arm body in the longitudinal direction including the leading end portion for hooking the yarn, and can improve the durability of the traverse arm (i.e., increase the service life).

In the traverse arm, each of the layers is preferably formed by containing carbon fibers and an epoxy thermosetting resin.

This enables the arm body to be easily formed.

In the traverse arm, preferably, the carbon fiber is a long fiber.

This can enhance the strength of the carbon fibers in the fiber direction.

According to a second aspect of the present invention, there is provided a winding unit having the following structure. That is, the winding unit includes a traverse arm, a traverse driving section, and a winding driving section. The traverse driving section drives the traverse arm so as to reciprocate the traverse arm. The winding driving section winds the yarn traversed by the traverse arm.

Thus, the winding unit having the traverse arm which is light and excellent in durability can be configured.

According to a third aspect of the present invention, there is provided a yarn winding machine comprising a plurality of winding units.

Thus, the yarn winding machine capable of reducing the frequency of replacing the traverse arm can be configured.

According to the 4 th aspect of the present invention, there is provided the following method for manufacturing an arm body of a traverse arm. That is, the arm body is provided to a traverse arm for guiding the yarn. The method for manufacturing the arm body of the traverse arm includes a 1 st step and a 2 nd step. In the first step 1, a plurality of prepreg sheets including carbon fibers having a fiber direction aligned in one direction are stacked so that the fiber directions of at least two of the prepreg sheets are different from each other. In the 2 nd step, the prepreg sheet laminate is press-molded.

This makes it possible to easily form a lightweight and strong traverse arm and to ensure a balance of anisotropy in mechanical strength.

Drawings

Fig. 1 is a schematic front view of an automatic winder according to an embodiment of the present invention.

Fig. 2 is a schematic front view of the winder unit.

Fig. 3 is a partial side view showing a state in the vicinity of the traverse device.

Fig. 4A is a perspective view showing the structure of the boom of embodiment 1.

Fig. 4B is a perspective view showing a plurality of layers constituting the traverse main body.

Fig. 5 is a perspective view showing the structure of the sheet stacked body.

Fig. 6 is a schematic view showing press forming.

Fig. 7 is a perspective view showing the structure of a sheet stack constituting the traverse arm according to embodiment 2.

Detailed Description

Next, embodiments of the present invention will be described with reference to the drawings. First, the structure of an automatic winder (yarn winding machine) 1 according to the present embodiment will be described with reference to fig. 1 and the like. In the present specification, "upstream" and "downstream" refer to upstream and downstream in the running direction of the yarn when the yarn is wound.

The automatic winder 1 shown in fig. 1 includes a plurality of winder units (winding units) 1O arranged in a row.

In each winding unit 10, the yarn 20 unwound from the yarn supplying bobbin 21 is wound around the winding bobbin 22 for winding the yarn 20 while being traversed (traverse), thereby forming a package 30. As shown in fig. 2, each winder unit 10 mainly includes a unit control unit 50, a yarn feeder 11, a yarn unwinding assisting device 12, a tension applying device 13, a yarn splicing device 14, a yarn monitoring device 15, and a winding unit 16, which are arranged in this order from upstream to downstream.

The unit control unit 50 includes, for example, a CPU and a ROM, and the CPU controls each part of the winder unit 10 by executing a program described in the ROM.

The yarn supplying portion 11 holds a yarn supplying bobbin 21, which is supplied from a yarn supplying bobbin conveying system or a magazine type bobbin supplying device, not shown, at a predetermined position.

The yarn unwinding assisting device 12 includes a regulating member 40 formed in a substantially cylindrical shape and capable of covering the core tube of the yarn supplying bobbin 21. The regulating member 40 is provided so as to be movable in the axial direction of the yarn supplying bobbin 21 in a direction of moving closer to or away from the yarn supplying bobbin 21. The regulating member 40 connects the balloon formed on the upper portion of the yarn supplying bobbin 21 by the centrifugal force of the yarn 20 unwound from the yarn supplying bobbin 21, and regulates the balloon to an appropriate size. In this way, the yarn unwinding assisting device 12 assists the unwinding of the yarn 20 from the yarn supplying bobbin 21 by the regulating member 40.

The tension applying device 13 applies a predetermined tension to the running yarn 20. The tension applying device 13 may be configured as a gate type structure in which movable comb teeth are arranged with respect to fixed comb teeth, for example. The tension applying device 13 applies a constant tension to the wound yarn 20 by passing the yarn 20 while bending between the engaged comb teeth. The tension applying device 13 is not limited to the gate type structure, and may be a disk type structure, for example.

The yarn joining device 14 joins the yarn 20 captured from the yarn supplying bobbin 21 side (lower yarn) and the yarn 20 captured from the package 30 (upper yarn) when the yarn is cut by the cutter 39 when the yarn defect is detected by the yarn monitoring device 15 described later, or when the yarn is cut while the yarn 20 on the yarn supplying bobbin 21 is being unwound. The yarn splicing device 14 can use, for example, a splicing device that splices yarn ends with each other by a swirling air flow, a mechanical knotter, or the like.

The yarn splicing device 14 is provided with a lower yarn catching member 25 for catching the yarn end on the yarn supplying bobbin 21 side and guiding the yarn end to the yarn splicing device 14, and an upper yarn catching member 26 for catching the yarn end on the package 30 side and guiding the yarn end to the yarn splicing device 14, respectively, on the upstream side and the downstream side.

The yarn monitoring device 15 monitors the quality (thickness) and the like of the running yarn 20 by a light transmission sensor, and detects a yarn defect (a portion where the thickness and the like are abnormal, and the like) included in the yarn 20. A cutter 39 for cutting the yarn 20 immediately when the yarn monitoring device 15 detects a yarn defect is provided in the vicinity of the yarn monitoring device 15. The yarn monitoring device 15 may be formed of, for example, a capacitance sensor.

The winding section 16 mainly includes a cradle 23, a traverse device 27, and a contact roller 29, and winds the yarn 20 around the winding bobbin 22 while traversing the yarn to form a package 30.

The cradle 23 detachably holds the winding bobbin 22 (package 30) and is configured to be rotatable in a direction of approaching and separating from the contact roller 29. By the rotation of the cradle 23, an increase in the yarn layer diameter of the package 30 accompanying the winding of the yarn 20 onto the winding bobbin 22 can be absorbed. That is, even if the diameter of the yarn layer of the package 30 changes due to the winding of the yarn 20, the outer peripheral surface of the package 30 can be appropriately brought into contact with the contact roller 29.

A package driving motor (winding driving unit) 41, for example, a servo motor is attached to the cradle 23. The yarn 20 is wound around the outer peripheral surface of the winding bobbin 22 (package 30) by rotationally driving the winding bobbin 22 (package 30) by the package driving motor 41.

The rotation shaft of the package drive motor 41 is connected to the winding bobbin 22 so as not to rotate relative thereto when the winding bobbin 22 is supported by the cradle 23 (so-called direct drive system). The package driving motor 41 is electrically connected to the unit control section 50, and the unit control section 50 can control the rotation speed and the rotation direction of the package driving motor 41.

The traverse device 27 is configured as an arm type traverse device. The traverse device 27 includes the traverse arm 6 and a traverse arm drive motor (traverse drive section) 60. The winding section 16 winds the yarn 20 into the package 30 while traversing the yarn 20 via the traverse device 27.

The traverse arm 6 is formed to be elongated and configured to be able to hold the yarn 20 at its leading end. As shown in fig. 3, the traverse arm 6 is attached to a drive shaft (rotation shaft) 60a of the traverse arm drive motor 60 via the attachment member 31. Therefore, the traverse arm 6 can rotate together with the drive shaft 60 a.

The traverse arm driving motor 60 is constituted by a servomotor, for example. The traverse arm driving motor 60 drives the traverse arm 6 to reciprocate through the driving shaft 60 a. The traverse arm driving motor 60 is electrically connected to the unit control section 50, and the unit control section 50 reciprocally and rotationally drives the traverse arm driving motor 60 in conjunction with the package driving motor 41, thereby traversing the yarn 20 wound into the package 30 at a predetermined skew angle.

The contact roller 29 is rotatably supported and configured to be contactable with the outer peripheral surface of the winding bobbin 22 (package 30) from below. The contact roller 29 can support at least a part of the weight of the winding bobbin 22 (package 30).

In this way, the traverse device 27 reciprocates the traverse arm 6 using the traverse arm driving motor 60 in a state where the yarn 20 is hooked at the tip of the traverse arm 6, thereby reciprocating the tip of the traverse arm 6 in the winding width direction of the package 30 and traversing the yarn 20 on the surface of the package 30. Thus, the winding section 16 winds the yarn 20 around the winding bobbin 22 (package 30) while traversing the yarn at a predetermined winding width and a predetermined speed, and forms a yarn layer formed on the outer peripheral surface of the winding bobbin 22 (package 30) at a desired density.

Next, the traverse arm 6 of the present embodiment will be described in detail with reference to fig. 4A and 4B.

As shown in fig. 4A, the traverse arm 6 is composed of an arm main body 61 and a guide member 62.

The arm body 61 is made of Carbon Fiber Reinforced Plastic (CFRP). The arm main body 61 is manufactured by a 1 st step of stacking five prepreg sheets 80 and a 2 nd step of heating and press-molding the sheet laminate 8 obtained thereby.

Each prepreg sheet 80 is a so-called CFRP sheet, and is configured by impregnating a plurality of carbon fibers with a liquid uncured epoxy thermosetting resin. The carbon fibers contained in the prepreg sheet 80 are long fibers. In the prepreg sheet 80, the carbon fibers are aligned in a predetermined linear direction and in parallel. By heating the prepreg sheet 80, the resin is cured in a state where the carbon fibers are impregnated with the resin, and the carbon fibers and the resin can be integrated. In the following description, the direction in which the carbon fibers are oriented is sometimes referred to as a fiber direction.

In the following description, the 2 nd prepreg sheet 80 from the top in fig. 5 may be referred to as the 1 st sheet 81, the 3 rd as the 2 nd sheet 82, and the 4 th as the 3 rd sheet 83. The uppermost sheet may be referred to as a 4 th sheet 84, and the lowermost sheet may be referred to as a 5 th sheet 85. The direction in which these sheets overlap is the thickness direction of the arm main body 61. In the sheet laminate 8, five prepreg sheets 80 are arranged in an overlapping manner in the order of the 4 th sheet 84, the 1 st sheet 81, the 2 nd sheet 82, the 3 rd sheet 83, and the 5 th sheet 85 from one side in the thickness direction. That is, the sheet stacked body 8 is formed by stacking five prepreg sheets 80 in the order of the 4 th sheet 84, the 1 st sheet 81, the 2 nd sheet 82, the 3 rd sheet 83, and the 5 th sheet 85.

As shown in fig. 5, the fiber directions of the carbon fibers of the 1 st, 3 rd, 4 th and 5 th sheets 81, 83, 84 and 85 of the five prepreg sheets 80 are parallel to each other, the fiber direction of the carbon fibers of the 2 nd sheet 82 is perpendicular to the fiber directions of the carbon fibers of the 1 st, 3 rd, 4 th and 5 th sheets 81, 83, 84 and 85, and the numerical value of the angle described in fig. 5 and the like indicates how much the carbon fibers of the prepreg sheet 80 are oriented in which direction with the longitudinal direction of the arm body 61 as a reference, wherein, when the angle is α, -90 ° < α ≦ 90 °.

As shown in fig. 6, the sheet laminate 8 in which five prepreg sheets 80 are stacked in this manner is sandwiched between molds 100 arranged to face each other. Concave or convex portions corresponding to the shapes of the bent portions 69 and the reinforcing portions 70 described later are formed on the parting surfaces of the pair of dies 100. The sheet laminated body 8 is disposed with respect to the mold 100 such that the fiber direction (i.e., the direction at an angle of 0 °) of the carbon fibers in the 1 st sheet 81, the 3 rd sheet 83, the 4 th sheet 84, and the 5 th sheet 85 coincides with the longitudinal direction of the arm main body 61.

The sheet laminate 8 is pressed through the mold 100 while at least one of the pair of molds 100 is heated, and thereby the thermosetting resin is cured in a state impregnated with the carbon fibers. By this heating press forming, the arm main body 61 can be formed to have a shape that is a replica of the divided surface of the mold 100.

In correspondence with the sheet laminate 8 being constituted by five prepreg sheets 80, the arm main body 61 includes five layers 90 as shown in fig. 4B. Fig. 4B is an enlarged view of a portion indicated by a small circle with a broken line in fig. 4A. The layer 90 formed from the 1 st sheet 81 corresponds to the 1 st layer 91, the layer 90 formed from the 2 nd sheet 82 corresponds to the 2 nd layer 92, and the layer 90 formed from the 3 rd sheet 83 corresponds to the 3 rd layer 93. The layer 90 formed of the 4 th sheet 84 corresponds to the 4 th layer 94, and the layer 90 formed of the 5 th sheet 85 corresponds to the 5 th layer 95. The five layers 90 are integrated by hot press forming.

The thermosetting resin used for the prepreg sheet 80 is not limited to the epoxy resin, and various thermosetting resins can be used. However, when a fast-curing resin is used as the thermosetting resin, since the heating time for curing can be shortened, productivity can be improved, and cost reduction can be achieved.

In the arm main body 61 formed as described above, the carbon fibers of the 1 st layer 91, the 3 rd layer 93, the 4 th layer 94, and the 5 th layer 95 are oriented at 0 ° with respect to the longitudinal direction of the arm main body 61. On the other hand, the carbon fibers of the 2 nd layer 92 are oriented at 90 ° with respect to the length direction of the arm main body 61.

As a result, a large proportion of the carbon fibers are oriented in a manner along the length direction of the arm main body 61. In general, in a fiber-reinforced plastic in which the fiber direction is aligned in one direction, the strength in the fiber direction is greatly improved as compared with the strength in a direction different from the fiber direction by 90 °. By this anisotropy, good mechanical properties can be achieved particularly in the longitudinal direction of the arm main body 61.

In the 4 th layer 94 and the 5 th layer 95 located on the outer side in the thickness direction of the arm main body 61 susceptible to the external force, the fiber direction of the carbon fiber is oriented in a direction of 0 ° with respect to the longitudinal direction of the arm main body 61 (i.e., the longitudinal direction). Therefore, the strength and the bending rigidity in the longitudinal direction of the arm body 61 can be further improved.

In the 2 nd layer 92 located at the center in the thickness direction among the five layers 90, the fiber direction of the carbon fibers is different from the fiber direction of the carbon fibers of the other layers 90. Specifically, the fiber direction of the carbon fibers of the 2 nd layer 92 is oriented in a direction of 90 ° with respect to the longitudinal direction of the arm main body 61 (i.e., the width direction of the arm main body 61). This ensures a constant strength in the width direction of the arm body 61, and achieves a well-balanced mechanical strength.

As shown in fig. 4A, the arm main body 61 formed as described above includes a base end portion 63, an intermediate portion 64, and a tip end portion 65. The arm main body 61 is formed in a tapered shape that gradually narrows as it goes away from the base end portion 63 when viewed from the thickness direction.

The base end portion 63 is formed with a shaft hole 66, a passage hole 67, and a fixing hole 68.

The shaft hole 66 is a hole through which the driving shaft 60a of the traverse arm driving motor 60 can pass, and is formed in a circular hole shape.

The passage hole 67 is configured as a hole for passing an unillustrated key for keying the drive shaft 60a of the traverse arm drive motor 60 to the mounting member 31 described later.

The fixing holes 68 are holes for attaching the mounting member 31, and a plurality of holes are formed. The mounting member 31 is configured as a cylindrical boss-shaped member, and is fixed to be non-rotatable by being keyed to the drive shaft 60 a. The mounting member 31 has a screw hole, not shown. The mounting member 31 can be fixed to the arm body 61 by inserting a screw as a fixing member into each of the fixing holes 68 and tightening the screw into the threaded hole of the mounting member 31. As a result, the arm main body 61 (in other words, the traverse arm 6) rotates integrally with the drive shaft 60 a.

The intermediate portion 64 is located between the base end portion 63 and the tip end portion 65, and occupies most of the arm main body 61. The intermediate portion 64 is formed so as to gradually narrow in width as it approaches from the base end portion 63 side to the tip end portion 65 when viewed from the thickness direction of the traverse arm 6. The longitudinal direction of the arm main body 61 in the present invention is a direction along a line connecting the base end portion 63 and the tip end portion 65.

In the arm main body 61, a bent portion 69 is formed between the intermediate portion 64 and the tip end portion 65. As shown in fig. 3, the bent portion 69 is disposed at a middle portion of the arm main body 61, and the longitudinal direction of the arm main body 61 changes at this portion. The bending direction at the bent portion 69 is a direction in which the leading end portion 65 approaches the contact roller 29. This can shorten the length of the yarn 20 from the leading end 65 of the traverse arm 6 to the contact with the contact roller 29, and can stabilize the operation of the yarn 20, thereby improving the quality of the package 30 to be formed.

The front end portion 65 is inclined with respect to the longitudinal direction of the intermediate portion 64 by the bending at the bent portion 69. The front end portion 65 is formed in a hook shape, and a yarn hooking groove 65a is formed at the hook portion. The yarn hooking groove 65a is formed linearly in a direction along the longitudinal direction of the distal end portion 65. The side of the yarn hooking groove 65a close to the base end 63 of the arm main body 61 is open.

The traverse arm 6 hooks the yarn 20 so as to be positioned in the yarn hooking groove 65a of the tip portion 65. As the traverse arm 6 reciprocates, the yarn 20 caught in the yarn catching groove 65a traverses the winding bobbin 22 (package 30).

The guide member 62 is disposed so as to cover the inner wall surface of the yarn hooking groove 65 a. The guide member 62 is fixed to the tip end portion 65 of the traverse arm 6 by an adhesive or the like. The guide member 62 is formed of a material having excellent wear resistance, such as ceramic. By providing the guide member 62 in the contact portion with the yarn 20 in this manner, the rigidity and wear resistance of the contact portion can be improved.

A reinforcing portion (reinforcing portion) 70 is formed in the arm main body 61. The reinforcing portion 70 is formed to be elongated similarly to the arm main body 61, and is disposed so as to straddle both the intermediate portion 64 and the distal end portion 65. The reinforcing portion 70 is formed in such a manner that the widthwise middle portion of the arm main body 61 is convex toward one side in the thickness direction (concave when viewed from the opposite side in the thickness direction).

The reinforcing portion 70 is formed to have a narrower width as it approaches the distal end portion 65, similarly to the arm main body 61. The reinforcing portion 70 is formed so that the amount of projection or depression in the thickness direction of the arm main body 61 decreases as the distance from the distal end portion 65 decreases.

A cross-sectional profile 61a of the arm main body 61 is shown by a dashed-dotted line in fig. 4A. In this way, the reinforcing portion 70 is formed so that a cross section (cross section) orthogonal to the longitudinal direction of the arm main body 61 is arcuate (semicircular). This effectively improves the rigidity of the arm main body 61 with a simple shape.

Further, since the arm main body 61 is curved in the curved shape including the reinforcement portion 70 due to the curved portion 69, the mechanical strength of the portion of the curved portion 69 can be effectively increased, and deformation, breakage, or the like can be prevented.

As described above, the traverse arm 6 of the present embodiment guides the yarn 20. The traverse arm 6 includes an arm main body 61. The arm main body 61 is formed by integrating a plurality of layers 90 made of carbon fiber reinforced plastic including carbon fibers aligned in a fiber direction which is a predetermined linear direction. The plurality of layers 90 are stacked in the thickness direction of the arm main body 61. The fiber direction of the 2 nd layer 92 in the plurality of layers 90 is different from the fiber direction of the other layers.

This makes it possible to easily realize the lightweight and strong boom 6. In addition, the traverse arm 6 can have appropriate anisotropy in mechanical strength.

In the traverse arm 6 of the present embodiment, the arm main body 61 is formed to be elongated. The number of layers 90 stacked in the thickness direction of the arm main body 61 is five (odd number). The fiber direction of the 2 nd layer 92 positioned at the center among the plurality of stacked layers 90 coincides with the width direction of the arm main body 61.

This can improve the strength of the arm body 61 in the width direction.

In the traverse arm 6 of the present embodiment, the plurality of layers 90 includes the 1 st layer 91, the 2 nd layer 92, and the 3 rd layer 93. The 2 nd layer 92 is laminated on the 1 st layer 91. The 3 rd layer 93 is laminated on the 2 nd layer 92 on the opposite side of the 1 st layer 91. The fiber direction of the 1 st layer 91 and the fiber direction of the 3 rd layer 93 coincide with the longitudinal direction of the arm main body 61. The fiber direction of the 2 nd layer 92 coincides with the width direction of the arm main body 61.

This ensures strength in the width direction of the arm body 61 to some extent, and ensures high strength in the longitudinal direction.

In the traverse arm 6 of the present embodiment, the arm body 61 is formed with a reinforcing portion 70 formed of a convex portion, which is elongated in the longitudinal direction of the arm body 61. The arm main body 61 has a portion bent in the longitudinal direction including the reinforcing portion 70.

This can further increase the strength of the arm main body 61 in the longitudinal direction including the distal end portion 65 for catching the yarn 20, and can improve the durability (i.e., increase the service life) of the traverse arm 6.

In the traverse arm 6 of the present embodiment, each layer 90 is formed of carbon fibers and an epoxy thermosetting resin.

This enables the arm body 61 to be easily formed.

In the traverse arm 6 of the present embodiment, the carbon fiber is a long fiber.

This can enhance the strength of the carbon fibers in the fiber direction.

Next, embodiment 2 will be explained. Fig. 7 is a perspective view showing a structure of a sheet laminated body 8x for manufacturing the arm main body 61 in the traverse arm 6 according to embodiment 2. In the description of the present embodiment, the same or similar components as those of the above-described embodiment are denoted by the same reference numerals in the drawings, and the description thereof may be omitted.

In the traverse arm 6 of the present embodiment, the shape of the arm main body 61 is substantially the same as that shown in fig. 4A. However, in manufacturing the arm main body 61, as shown in fig. 7, a sheet laminate 8x in which seven prepreg sheets 80, not five, are laminated is used. In the following description, the 3 rd prepreg sheet 80 from the top in fig. 7 may be referred to as the 1 st sheet 81, the 4 th sheet as the 2 nd sheet 82, and the 5 th sheet as the 3 rd sheet 83. The 2 nd sheet from the top is sometimes referred to as a 4 th sheet 84, the 2 nd sheet from the bottom is sometimes referred to as a 5 th sheet 85, the uppermost sheet is sometimes referred to as a 6 th sheet 86, and the lowermost sheet is sometimes referred to as a 7 th sheet 87.

Corresponding to the sheet laminate 8x being composed of seven prepreg sheets 80, although not shown in detail, the arm main body 61 includes seven layers 90. The layer 90 formed from the 1 st sheet 81 corresponds to the 1 st layer, the layer 90 formed from the 2 nd sheet 82 corresponds to the 2 nd layer, and the layer 90 formed from the 3 rd sheet 83 corresponds to the 3 rd layer. The layer 90 formed of the 4 th sheet 84 corresponds to the 4 th layer, and the layer 90 formed of the 5 th sheet 85 corresponds to the 5 th layer. The layer 90 formed of the 6 th sheet 86 corresponds to the 6 th layer, and the layer 90 formed of the 7 th sheet 87 corresponds to the 7 th layer.

In the present embodiment, the 6 th and 7 th layers are outermost layers 90. The 4 th layer is laminated on the 1 st layer on the opposite side of the 2 nd layer. The 5 th layer is laminated to the 3 rd layer on the opposite side of the 2 nd layer. That is, the 4 th layer is adjacent to the 1 st layer on the opposite side of the 2 nd layer. The 5 th layer is adjacent to the 3 rd layer on the opposite side of the 2 nd layer.

The fiber direction of the carbon fiber of the 6 th layer and the fiber direction of the carbon fiber of the 7 th layer are oriented at an angle of-45 ° with respect to the longitudinal direction of the arm main body 61. The fiber direction of the carbon fiber of the 4 th layer and the fiber direction of the carbon fiber of the 5 th layer are oriented at 45 ° with respect to the longitudinal direction of the arm main body 61.

The traverse arm 6 configured as described above has excellent torsional rigidity and strength in the longitudinal direction, and can be made lightweight (for example, the weight of less than 10 g in the traverse arm 6 that realizes a traverse width of about 6 inches). In other words, the traverse arm 6 having a small moment of inertia can be configured, and the load on the traverse arm drive motor 60 can be reduced even when reciprocating rotational driving is performed at high speed.

The arm main body 61 of the present embodiment includes a layer 90 in which the fiber direction of carbon fibers is oriented in the directions of-45 °, and 90 ° with respect to the longitudinal direction of the arm main body 61. Therefore, the impact resistance of the yarn 20 against the traverse can be improved.

As described above, in the traverse arm 6 of the present embodiment, the plurality of layers 90 includes the 1 st layer obtained from the 1 st sheet 81, the 2 nd layer obtained from the 2 nd sheet 82, the 3 rd layer obtained from the 3 rd sheet 83, the 4 th layer obtained from the 4 th sheet 84, and the 5 th layer obtained from the 5 th sheet 85. The 4 th layer is laminated on the 1 st layer on the opposite side of the 2 nd layer. The 5 th layer is laminated to the 3 rd layer on the opposite side of the 2 nd layer. In both the 4 th layer and the 5 th layer, the fiber direction is inclined at an angle of 30 ° or more and 60 ° or less (specifically, 45 °) with respect to the fiber direction of the 1 st layer.

This can ensure high strength in the longitudinal direction of the arm body 61, and can improve torsional rigidity.

While the preferred embodiments of the present invention have been described above, the above configuration can be modified as follows, for example.

Instead of the tension applying device 13, a yarn accumulating device that accumulates the yarn 20 by winding the yarn 20 around the yarn accumulating roller may be provided.

The shape of the guide member 62 is not particularly limited, but is preferably a compact shape covering the inner wall of the yarn hooking groove 65a that contacts the yarn 20. This makes it possible to reduce the weight of the guide member 62.

The arm main body 61 may be made of glass fiber, ceramic fiber, aramid fiber, ultra-high molecular weight polyethylene, or the like, in addition to carbon fiber. However, carbon fiber is preferably used from the viewpoint of weight reduction.

The fiber direction of the carbon fibers in each layer is not limited to the above-described direction, and can be appropriately changed as necessary. However, from the viewpoint of torsional rigidity and the like, it is preferable that the angle formed between the fiber direction of the 4 th layer and the fiber direction of the 1 st layer is 30 ° or more and 60 ° or less in both the 4 th layer and the 5 th layer. The fiber direction of the 6 th layer may be symmetrical or asymmetrical to the fiber direction of the 4 th layer with respect to the fiber direction of the 1 st layer. The fiber direction of the 7 th layer can be either symmetrical or asymmetrical with the fiber direction of the 5 th layer with respect to the fiber direction of the 1 st layer.

The arm main body may further include a layer made of only resin in addition to the layer 90 made of the prepreg sheet 80 containing carbon fibers.

The prepreg sheet 80 is configured by impregnating a plurality of carbon fibers with a liquid uncured epoxy thermosetting resin, but is not limited to this configuration. A thermoplastic resin can also be used instead of the thermosetting resin.

Claims (13)

1. A traverse arm for guiding a yarn, the traverse arm being characterized in that,

the arm body is formed by integrating a plurality of layers made of carbon fiber reinforced plastic, the carbon fiber reinforced plastic comprises carbon fibers arranged along a fiber direction which is a predetermined linear direction,

a plurality of the layers are laminated in a thickness direction of the arm main body,

the fiber direction of at least two of the layers in the plurality of layers is different.

2. The traverse arm of claim 1,

the arm main body is formed to be elongated,

the number of the layers stacked in the thickness direction of the arm main body is an odd number,

the fiber direction of a layer located at the center in the thickness direction among the plurality of stacked layers coincides with the width direction of the arm main body.

3. The traverse arm of claim 1,

the plurality of layers including a 1 st layer, a 2 nd layer laminated on the 1 st layer, and a 3 rd layer laminated on the 2 nd layer on the opposite side of the 1 st layer,

the fiber direction of the 1 st layer and the fiber direction of the 3 rd layer are aligned with the longitudinal direction of the arm main body, and the fiber direction of the 2 nd layer is aligned with the width direction of the arm main body.

4. The traverse arm of claim 2,

the plurality of layers including a 1 st layer, a 2 nd layer laminated on the 1 st layer, and a 3 rd layer laminated on the 2 nd layer on the opposite side of the 1 st layer,

the fiber direction of the 1 st layer and the fiber direction of the 3 rd layer are aligned with the longitudinal direction of the arm main body, and the fiber direction of the 2 nd layer is aligned with the width direction of the arm main body.

5. The boom of claim 3,

the plurality of layers further comprises:

a 4 th layer laminated on the 1 st layer on the opposite side of the 2 nd layer; and

a 5 th layer laminated on the 3 rd layer on the opposite side of the 2 nd layer,

in both the 4 th layer and the 5 th layer, the fiber direction thereof is inclined at an angle of 30 ° or more and 60 ° or less with respect to the fiber direction of the 1 st layer.

6. The boom of claim 4,

the plurality of layers further comprises:

a 4 th layer laminated on the 1 st layer on the opposite side of the 2 nd layer; and

a 5 th layer laminated on the 3 rd layer on the opposite side of the 2 nd layer,

in both the 4 th layer and the 5 th layer, the fiber direction thereof is inclined at an angle of 30 ° or more and 60 ° or less with respect to the fiber direction of the 1 st layer.

7. The boom of claim 5,

in both the 4 th layer and the 5 th layer, the fiber direction of the layers makes an angle of 45 ° with the fiber direction of the 1 st layer.

8. The traverse arm of claim 6,

in both the 4 th layer and the 5 th layer, the fiber direction of the layers makes an angle of 45 ° with the fiber direction of the 1 st layer.

9. The traverse arm according to any of claims 1 to 8,

a reinforcing portion formed of a convex portion or a concave portion is formed on the arm body to be elongated in a longitudinal direction of the arm body,

the arm main body has a portion bent in a longitudinal direction including the reinforcing portion.

10. The traverse arm of claim 9,

each of the layers is formed by containing carbon fibers and an epoxy thermosetting resin.

11. The traverse arm of claim 10,

the carbon fibers are long fibers.

12. A winding unit is characterized by comprising:

the traverse arm according to any of claims 1 to 11;

a traverse driving section for driving the traverse arm to reciprocate; and

and a winding driving section for winding the yarn traversed by the traverse arm.

13. A yarn winding machine is characterized in that,

a plurality of the winding units according to claim 12 are provided.

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