JP6977407B2 - Drums, spools and drum manufacturing methods - Google Patents

Description

The present invention relates to a drum, a bobbin winder, and a method for manufacturing a drum.

As a conventional drum, for example, the apparatus described in Patent Document 1 is known. The drum described in Patent Document 1 is formed with a groove portion and other portions as an integral body of an iron-based metal and having an extremely thin wall thickness.

Japanese Unexamined Patent Publication No. 61-69670

As described above, the drum is made of an iron-based metal such as cast iron. Therefore, the drum may be rusted. When rust occurs in the twill groove, a defect occurs in the thread in contact with the rust, and the thread quality may deteriorate. Therefore, the drum is required to suppress the generation of rust.

One aspect of the present invention is to provide a drum, a bobbin winder, and a method for manufacturing a drum capable of suppressing the generation of rust.

The drum according to one aspect of the present invention includes a metal drum body having a groove on the peripheral surface, and at least a phosphoric acid layer added to the groove wall surface of the groove.

In the drum according to one aspect of the present invention, a phosphoric acid layer is added to at least the groove wall surface of the groove. The phosphoric acid layer has excellent rust prevention properties. Therefore, in the drum, the generation of rust can be suppressed by adding the phosphoric acid layer to the groove wall surface of the groove. As a result, for example, it is possible to prevent the yarn from coming into contact with rust, so that it is possible to prevent the yarn quality from deteriorating.

In one embodiment, at least a nitride layer formed on the groove wall surface of the drum body may be provided, and the phosphoric acid layer may be added on the nitride layer. The surface hardness can be ensured in the nitrided layer formed by the nitriding treatment. Therefore, in the drum, by forming a nitrided layer between the drum body and the phosphoric acid layer, wear resistance, fatigue resistance, corrosion resistance, heat resistance and the like can be ensured.

In one embodiment, the nitride layer may be formed over the entire peripheral surface of the drum body. With this configuration, wear resistance and the like can be ensured on the peripheral surface of the drum body.

In one embodiment, the peripheral surface of the drum body includes an outer peripheral surface which is a circumferential surface, a side surface, and a groove wall surface, and the thickness of the phosphoric acid layer is larger on the groove wall surface than on the outer peripheral surface. May be good. With this configuration, the occurrence of rust on the groove wall surface can be further suppressed.

In one embodiment, the phosphoric acid layer may not be added to the outer peripheral surface. Since the outer peripheral surface comes into contact with the surface of the package, this contact suppresses the generation of rust. The nitrided layer formed by the nitriding treatment has a better appearance than the phosphoric acid layer. Therefore, it is possible to enhance the rust preventive action of the groove wall surface where rust is likely to occur and maintain a good appearance of the drum.

In one embodiment, the phosphoric acid layer may have a composition containing manganese. A phosphoric acid layer having a composition containing manganese has a higher hardness than a layer having a composition containing other raw materials. Therefore, in the drum, the wear resistance can be further improved.

In one embodiment, the phosphoric acid layer may have a composition containing zinc. The phosphoric acid layer containing zinc has excellent rust resistance. Therefore, in the drum, the rust prevention property can be further improved.

In one embodiment, the surface roughness Ra of the phosphoric acid layer may be 1.0 or less. In this configuration, it is possible to prevent the yarn from having a defect (damage to the yarn Y, etc.) due to the phosphoric acid layer in contact with the yarn. Therefore, deterioration of yarn quality can be suppressed.

The yarn winder according to one aspect of the present invention includes a yarn feeder for supplying yarn and a winder having the above-mentioned drum and winding the yarn.

In the bobbin winder according to one aspect of the present invention, the winder has the drum. Therefore, it is possible to suppress the occurrence of rust on the drum of the bobbin winder.

In the method for manufacturing a drum according to one aspect of the present invention, in a metal drum body having a groove on the peripheral surface, a phosphoric acid layer is added to at least the groove wall surface of the groove.

In the method for manufacturing a drum according to one aspect of the present invention, a phosphoric acid layer is added to at least the groove wall surface of the groove. The phosphoric acid layer has excellent rust prevention properties. Therefore, in the drum manufacturing method, the generation of rust on the drum can be suppressed by adding the phosphoric acid layer to the groove wall surface of the groove. As a result, for example, it is possible to prevent the yarn from coming into contact with rust, so that it is possible to prevent the yarn quality from deteriorating.

According to one aspect of the present invention, the occurrence of rust can be suppressed.

FIG. 1 is a diagram showing a configuration of a bobbin winder according to an embodiment. FIG. 2 is a view of the drum according to the embodiment as viewed from one side of the peripheral surface. FIG. 3 is a view of the peripheral surface of the drum as viewed from the other side. FIG. 4 is a diagram showing a cross-sectional configuration of the drum.

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 are designated by the same reference numerals, and duplicate description will be omitted.

As shown in FIG. 1, each winding unit (thread winding machine) 1 of the automatic winder includes a unit control unit 3, a thread feeding device 5, and a winding device 7.

The unit control unit 3 controls the operation of the take-up unit 1. The unit control unit 3 includes, for example, a CPU and a ROM. A program for controlling each configuration of the take-up unit 1 is stored in the ROM. The CPU executes the program stored in the ROM.

The thread feeding device 5 is a support mechanism that supports the thread feeding bobbin SB mounted on the transport tray (not shown) at a predetermined position. As a result, the thread Y is unwound from the thread feeding bobbin SB, and the thread Y is pulled out from the thread feeding bobbin SB. As a result, the yarn feeder 5 supplies the yarn Y. The yarn feeding device 5 is not limited to the transport tray type, and may be, for example, a magazine type. Further, when the package P is formed from the package P as described above, the yarn feeder 5 may be a support mechanism that supports the package P at a predetermined position.

The take-up device 7 includes a cradle 8 and a twill swing drum 9. The cradle 8 has a pair of rotary supports (not shown). The cradle 8 rotatably supports the take-up bobbin WB (or package P) by sandwiching the take-up bobbin WB with the rotation support portion. The cradle 8 can be switched between a state in which the supporting package P is in contact with the twill swing drum 9 and a state in which the package P is separated from the twill swing drum 9.

The twill swing drum 9 traverses the thread Y on the surface of the package P and rotates the package P. The twill swing drum 9 is rotationally driven by a drum drive motor (not shown). The operation of the drum drive motor is controlled by the unit control unit 3. By changing the rotation speed of the twill swing drum 9, the winding speed of the thread Y can be changed. That is, in the take-up unit 1, the unit control unit 3 controls the rotation speed of the drum drive motor to control the take-up speed of the yarn Y.

With the outer circumference of the package P in contact with the twill swing drum 9, the package P is driven to rotate by rotationally driving the twill swing drum 9. Further, a spiral twill groove 22 (see FIGS. 2 and 3) is formed on the outer peripheral surface of the twill swing drum 9. The thread Y unwound from the thread feeding bobbin SB is wound around the surface of the package P while being traversed by a twill groove with a constant width. As a result, the package P having a constant winding width can be formed.

Each take-up unit 1 has an unwinding assisting device 10, a tension applying device 11, and a tension detecting device 12 in this order from the yarn feeding device 5 side in the yarn traveling path between the yarn feeding device 5 and the winding device 7. A thread splicing device 13 and a thread monitoring device 14 are provided. A first capture guide device 15 and a second capture guide device 16 are arranged in the vicinity of the thread joining device 13.

The unwinding assisting device 10 includes a regulating member 17 that can cover the core tube of the thread feeding bobbin SB. The regulating member 17 has a substantially cylindrical shape, and is arranged so as to come into contact with a balloon formed on the upper portion of the thread layer of the thread feeding bobbin SB. The configuration of the unwinding assist device 10 is not limited to this.

The tension applying device 11 applies a predetermined tension to the traveling thread Y. The tension detecting device 12 detects (measures) the tension of the traveling yarn Y between the yarn feeding device 5 and the winding device 7. The tension detection device 12 outputs a tension measurement signal indicating a measured value of the tension of the thread Y to the unit control unit 3.

When the yarn Y is split between the yarn feeder 5 and the take-up device 7 for some reason, the yarn joining device 13 has a yarn Y (bobbin thread) on the yarn feeder 5 side and a take-up device. Thread Y (upper thread) on the 7 side and thread splicing are performed. In the present embodiment, the yarn splicing device 13 is configured as an air-type splicer device in which yarn ends are twisted together by a swirling air flow generated by compressed air. The thread splicing device 13 may be a disc-type splicer device, a piecer using a seed thread, or a knotter for mechanically tying the threads.

The thread monitoring device 14 monitors the state of the thread Y traveling on the thread path, and detects the presence or absence of a thread defect based on the monitored information. When a thread defect is detected, a thread defect detection signal is output to the unit control unit 3. The thread monitoring device 14 is provided with a cutter 18 for cutting the thread Y. The cutter 18 is operated by the thread monitoring device 14. The cutter 18 may be provided in the vicinity of the thread monitoring device 14.

The first catching guide device 15 catches the needle thread when the thread Y is in a split state. The first capture guide device 15 is rotatable (movable) from the standby position on the yarn feeder 5 side (solid line in FIG. 1) to the capture position on the take-up device 7 side (chain line in FIG. 1). The first catching guide device 15 catches the needle thread at the catching position and returns to the standby position to guide the needle thread to the thread joining device 13. The configuration and operation for guiding the needle thread to the thread joining device 13 are not limited to this.

The second capture guide device 16 can swivel (move) from the standby position on the yarn feeder 5 side (solid line in FIG. 1) to the capture position on the take-up device 7 side (chain line in FIG. 1). Possible). The second catching guide device 16 catches the bobbin thread and guides it to the thread joining device 13. The configuration and operation of guiding the bobbin thread to the thread splicing device 13 are not limited to this.

As described above, the take-up unit 1 winds the thread Y around the take-up bobbin WB to form the package P. During the thread splicing operation in the thread splicing device 13, the thread Y on the take-up device 7 side is captured by the first capture guide device 15, and the thread Y on the thread feeder 5 side is captured by the second capture guide device 16. Be captured. The thread Y captured by the first capture guide device 15 and the second capture guide device 16 is guided to the thread joint device 13. At this time, the thread Y is located in the slit of the thread monitoring device 14. The thread splicing device 13 splices the introduced thread Y. The configuration for guiding the thread Y to the thread joining device 13 is not limited to this.

Subsequently, the twill swing drum 9 of the winding device 7 will be described in detail. As shown in FIGS. 2 and 3, the twill swing drum 9 includes a drum body 20 having a substantially cylindrical shape. The drum body 20 is formed of a metal such as iron (Fe) using a molding die.

An opening (not shown) having a circular cross section formed at the time of die cutting at the time of molding is formed in the central portion of the drum main body 20. One end side of the opening is tapered so as to widen the hem toward one side surface 21a in the axial direction of the drum body 20, and the other end side of the opening has a hem toward the other side surface 21b. It has become widespread. The shape of the opening is not limited to the tapered shape, and a columnar or barrel-shaped opening can also be adopted.

The above-mentioned twill swing groove 22 is formed on the peripheral surface 20f of the drum main body 20. As shown in FIGS. 2 and 3, the twill swing groove 22 has a groove portion 22a that guides the thread Y (see FIG. 1) toward one end in the axial direction of the drum body 20 when the twill swing drum 9 rotates. A groove portion 22b that guides the thread Y to the other end side, and a groove portion 22c that reverses the guide direction of the thread Y are included. The groove portion 22a, the groove portion 22b, and the groove portion 22c are formed so as to draw an endless track on the drum main body 20. The cross-sectional shape of the twill groove 22 is appropriately designed in consideration of the degree of catching of the thread Y.

As shown in FIG. 4, the twill swing drum 9 includes a nitride layer 30 and a phosphoric acid layer 32.

The nitriding layer 30 is a layer formed by nitriding treatment. The nitrided layer 30 is formed on the peripheral surface 20f of the cylindrical drum body 20. The peripheral surface 20f of the cylindrical drum body 20 is composed of an outer peripheral surface 21 which is a circumferential surface, side surfaces 21a and 21b, and a groove wall surface 23 of the twill groove 22. The nitriding treatment is a treatment for hardening the metal surface. As the nitriding treatment method, gas nitriding, gas nitrocarburizing, salt bath nitriding, plasma (ion) nitriding and the like can be used. The thickness of the nitrided layer 30 is appropriately designed. By forming the nitrided layer 30, at least one of wear resistance, fatigue resistance, corrosion resistance, and heat resistance can be improved in the twill swing drum 9.

The phosphoric acid layer 32 is a crystalline phosphate film. The phosphoric acid layer 32 is added on the nitrided layer 30 formed on the groove wall surface 23 of the twill groove 22. In the present embodiment, the phosphoric acid layer 32 is not added on the nitrided layer 30 formed on the outer peripheral surface 21 of the drum main body 20. It should be noted that the fact that the phosphoric acid layer 32 is not added may include that it is not substantially added. That is, a part of the material forming the phosphoric acid layer 32 may be slightly present on the nitrided layer 30. The phosphoric acid layer 32 is formed by a phosphate treatment (lubrite treatment). Phosphate treatment includes, for example, washing (washing step), rinsing (washing step), phosphate treatment bath (treatment step), rinsing (washing step) and drying (drying) of the object surface forming the phosphoric acid layer 32. Step) may be included.

In the present embodiment, the phosphoric acid layer 32 may be a manganese phosphate film (composition containing manganese). The main component of the manganese phosphate film is hureaulite _{(Mn 5 (PO 3 (OH} )) 2 (PO 4) 2 · 4H 2 O). The manganese phosphate film is formed by precipitating manganese after being treated with a treatment liquid containing phosphate ions and manganese ions as main components in the above treatment step. The thickness of the manganese phosphate film is, for example, 5 μm to 15 μm.

In the present embodiment, the phosphoric acid layer 32 may be a manganese phosphate film (composition containing zinc). Main component of the zinc phosphate coating is hopeite _{(Zn 3 (PO 4) 2} · 4H 2 O) and phosphophyllite _{(Zn 2 Fe (PO 4)} 2 · 4H 2 O). The zinc phosphate film is formed by treating with a treatment liquid containing phosphate ions and zinc ions as main components in the above treatment step and precipitating zinc. The thickness of the zinc phosphate film is, for example, 2 μm to 3 μm.

The surface roughness Ra (arithmetic mean roughness: JIS B 0601: 2001) of the phosphoric acid layer 32 is preferably 1.0 or less. The surface roughness Ra of the phosphoric acid layer 32 is appropriately set according to the type of the yarn Y and the like.

Subsequently, a method for manufacturing the twill swing drum 9 will be described. First, the drum body 20 is formed by casting. Subsequently, the nitride layer 30 is formed on the outer peripheral surface 21 of the drum main body 20, on the side surfaces 21a and 21b, and on the groove wall surface 23 of the twill groove 22. The nitrided layer 30 is formed on the outer peripheral surface 21, the side surfaces 21a, 21b of the drum main body 20, and the groove wall surface 23 of the twill groove 22 by, for example, gas nitriding treatment.

Subsequently, the phosphoric acid layer 32 is added. The phosphoric acid layer 32 is added on the nitrided layer 30 by the above method. As a result, the phosphoric acid layer 32 is added on the nitrided layer 30 formed on the outer peripheral surface 21 of the drum main body 20 and the groove wall surface 23 of the twill groove 22. Subsequently, for example, the phosphoric acid layer added on the nitrided layer 30 formed on the outer peripheral surface 21 of the drum main body 20 is removed by buffing. As described above, the twill swing drum 9 is manufactured.

As described above, in the twill swing drum 9 according to the present embodiment, the phosphoric acid layer 32 is added to the groove wall surface 23 of the twill swing groove 22. The phosphoric acid layer 32 is excellent in rust prevention. More specifically, the phosphoric acid layer 32 is a crystalline film and has a denseness. Therefore, pinholes and the like are less likely to be formed in the phosphoric acid layer 32 as compared with, for example, Ni plating. As a result, it is possible to prevent the metal drum body 20 from coming into contact with water or the like through the pinhole, and thus it is excellent in rust prevention. Therefore, in the twill swing drum 9, the generation of rust can be suppressed by adding the phosphoric acid layer 32 to the groove wall surface 23 of the twill swing groove 22. As a result, for example, it is possible to prevent the yarn from coming into contact with rust, so that it is possible to prevent the yarn quality from deteriorating.

The twill swing drum 9 according to the present embodiment includes at least a nitride layer 30 formed on the groove wall surface 23 of the drum main body 20. The phosphoric acid layer 32 is added on the nitrided layer 30. The surface hardness of the nitrided layer 30 formed by the nitriding treatment can be ensured. Therefore, in the twill swing drum 9, by forming the nitrided layer 30 between the drum body 20 and the phosphoric acid layer 32, wear resistance, fatigue resistance, corrosion resistance, heat resistance, and the like can be ensured. ..

In the twill swing drum 9 according to the present embodiment, the nitrided layer 30 is formed over the entire peripheral surface 20f of the drum main body 20. With this configuration, wear resistance and the like of the peripheral surface 20f of the drum main body 20 can be ensured.

In order to secure wear resistance and rust prevention by forming a plating layer on the surface like a conventional drum, a plating layer is formed on the drum body and the strength of the plating layer is improved by heat treatment. There is. In this case, the manufacturing cost is high. Since it is not necessary to perform heat treatment or the like on the twill swing drum 9 according to the present embodiment, it is possible to reduce the manufacturing cost.

In the twill swing drum 9 according to the present embodiment, the peripheral surface 20f of the drum main body 20 includes an outer peripheral surface 21 which is a circumferential surface, side surfaces 21a and 21b, and a groove wall surface 23. The thickness of the phosphoric acid layer 32 is larger on the groove wall surface 23 than on the outer peripheral surface 21. In this embodiment, the phosphoric acid layer 32 is not added to the outer peripheral surface 21. As a result, the slipperiness of the peripheral surface 20f of the drum body 20 can be ensured. Therefore, in the twill swing drum 9, it is possible to prevent the peripheral surface 20f of the drum body 20 from adversely affecting the surface of the package P. Since the peripheral surface 20f of the drum body 20 is always in contact with the package P, rust is unlikely to occur. Therefore, in the twill swing drum 9, it is possible to suppress the generation of rust on the peripheral surface 20f without forming the phosphoric acid layer on the peripheral surface 20f of the drum main body 20.

Further, when the phosphoric acid layer 32 is formed on the peripheral surface 20f of the drum body 20, after many years of use, the phosphoric acid layer 32 may decrease due to contact with the package P, and the appearance of the drum body 20 may change. .. In the twilling drum 9, since the phosphoric acid layer 32 is not formed on the peripheral surface 20f of the drum body 20 with which the package P is in contact, the appearance cannot be changed. Therefore, in the twill swing drum 9, it is possible to prevent the user from feeling a sense of discomfort.

In the twill swing drum 9 according to the present embodiment, the phosphoric acid layer 32 may have a composition containing manganese. The phosphoric acid layer 32 having a composition containing manganese has a higher hardness than the layer having a composition containing other raw materials. Therefore, in the twill swing drum 9, the wear resistance can be further improved.

In the twill swing drum 9 according to the present embodiment, the phosphoric acid layer 32 may have a composition containing zinc. The phosphoric acid layer 32 containing zinc is excellent in rust prevention. Therefore, in the twill swing drum 9, the rust prevention property can be further improved.

In the twill swing drum 9 according to the present embodiment, the surface roughness Ra of the phosphoric acid layer 32 is 1.0 or less. In this configuration, it is possible to prevent the yarn from having a defect (damage to the yarn Y, etc.) due to the phosphoric acid layer 32 that is in direct contact with the yarn Y. Therefore, in the take-up unit 1, deterioration of yarn quality can be suppressed.

Although the embodiments of the present invention have been described above, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof.

In the above embodiment, the twill swing drum 9 has been described as an example as a drum having a groove on the peripheral surface. However, the drum is not particularly limited as long as a groove is formed on the peripheral surface. For example, the drum may be grooved at predetermined intervals in the circumferential direction.

In the above embodiment, the embodiment in which the phosphoric acid layer 32 is added to the groove wall surface 23 of the twilling groove 22 on the peripheral surface 20f of the twilling drum 9 has been described as an example. However, the phosphoric acid layer may also be added on the nitrided layer 30 formed on the outer peripheral surface 21 of the drum body 20. In this case, the thickness of the phosphoric acid layer is preferably larger on the groove wall surface than on the outer peripheral surface. Further, the phosphoric acid layer 32 may be added to the side surfaces 21a and 21b of the drum main body 20.

In the above embodiment, the embodiment in which the nitrided layer 30 is formed between the groove wall surface 23 of the twill groove 22 of the twill swing drum 9 and the phosphoric acid layer 32 has been described as an example. However, the nitrided layer may not be formed or another layer may be formed between the groove wall surface 23 of the twill groove 22 of the twill swing drum 9 and the phosphoric acid layer 32. In addition to the nitrided layer, another layer may be formed.

In the above embodiment, the embodiment in which the phosphoric acid layer 32 has a composition containing manganese phosphate or zinc phosphate has been described as an example. However, the phosphoric acid layer 32 may have a composition containing other materials.

In the above embodiment, the embodiment in which the twill swing drum 9 is used for the winding unit 1 of the automatic winder has been described as an example. However, the twill swing drum may be used in a thread winder such as a spinning machine.

1 ... Winding unit (thread winder), 5 ... Thread feeder, 7 ... Winding device, 9 ... Twill swing drum, 20 ... Drum body, 22 ... Twill swing groove, 30 ... Nitride layer, 32 ... Phosphoric acid layer , Y ... thread.

Claims (9)

A metal drum body with grooves formed to draw an endless track on the peripheral surface,
With at least a phosphoric acid layer added to the groove wall surface of the groove ,
The peripheral surface of the drum body includes an outer peripheral surface which is a circumferential surface, a side surface, and a groove wall surface.
The thickness of the phosphoric acid layer is larger on the groove wall surface than on the outer peripheral surface , the drum. At least a nitride layer formed on the groove wall surface of the drum body is provided.
The drum according to claim 1, wherein the phosphoric acid layer is added on the nitrided layer. The drum according to claim 2, wherein the nitrided layer is formed over the entire peripheral surface of the drum body. The drum according to any one of claims 1 to 3, wherein the phosphoric acid layer is not added to the outer peripheral surface. The drum according to any one of claims 1 to 4 , wherein the phosphoric acid layer has a composition containing manganese. The drum according to any one of claims 1 to 4 , wherein the phosphoric acid layer has a composition containing zinc. The drum according to any one of claims 1 to 6 , wherein the surface roughness Ra of the phosphoric acid layer is 1.0 or less. A yarn feeder that supplies yarn and
A thread winder comprising the drum according to any one of claims 1 to 7 and comprising a winding device for winding the thread. A metal drum body having a groove formed so as to draw an endless track on the peripheral surface, wherein the peripheral surface includes an outer peripheral surface which is a circumferential surface, a side surface, and a groove wall surface of the groove. In the drum body
A method for manufacturing a drum, in which the phosphoric acid layer is added so that the thickness of the phosphoric acid layer is larger on the groove wall surface than on the outer peripheral surface.

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