CN107954259B

CN107954259B - Yarn winding device

Info

Publication number: CN107954259B
Application number: CN201710917235.0A
Authority: CN
Inventors: 阵山达夫
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 2016-10-18
Filing date: 2017-09-30
Publication date: 2021-03-02
Anticipated expiration: 2037-09-30
Also published as: JP2018065637A; EP3375743A1; EP3312119A1; CN107954259A; EP3312119B1

Abstract

The present invention relates to a yarn winding device. The magnitude of the braking force applied to the package is changed as needed during deceleration of the package. The winding unit includes a brake device having a brake shoe for braking the package, a working chamber for operating the brake shoe, and an air pressure variable section for changing a pressure of a fluid supplied to the working chamber. The air pressure variable unit includes an electromagnetic valve disposed between the supply port and the working chamber, an electromagnetic valve disposed between the working chamber and the exhaust port, and an air pressure control unit for independently opening and closing the electromagnetic valve and the electromagnetic valve. When the solenoid valve is opened and closed, the pressure of the fluid supplied to the working chamber increases. When the solenoid valve is closed and opened, the pressure is reduced. If both solenoid valves are closed, the pressure is kept constant. Therefore, the pressure can be adjusted as needed, and the magnitude of the braking force applied to the package can be changed as needed.

Description

Yarn winding device

Technical Field

The present invention relates to a yarn winding device.

Background

Japanese patent application laid-open No. 2016 and 78995 discloses a yarn winding device that winds a yarn supplied from a yarn supplying portion around a winding bobbin to form a package. Specifically, the configuration is shown in which the yarn winding device includes a contact roller that rotates while contacting the package edge to rotate the package, and a roller driving source that drives the contact roller. Further, a structure for directly braking the rotation of the package is disclosed.

The yarn winding device includes: a rotating stand that rotates integrally with the winding bobbin, a package brake that brakes the rotating stand by the pressure of compressed air, an electromagnetic valve that switches the supply and stop of compressed air to the package brake, and a control unit that opens and closes the electromagnetic valve. The package brake includes a brake piston for braking rotation of the rotary holder, and a housing forming a working chamber for supplying compressed air. In a state where the compressed air is not supplied, the brake does not act on the package, and the package can freely rotate. When the control unit controls the electromagnetic valve to supply compressed air to the working chamber, the brake piston moves to contact the rotating holder, and the package is decelerated by frictional resistance generated between the brake piston and the rotating holder.

Further, japanese patent application laid-open No. 2010-37083 discloses a yarn winding device including a package brake, an electromagnetic valve, and a control unit similar to those of japanese patent application laid-open No. 2016-78995. The control unit controls the solenoid valve to alternately repeat the supply and discharge of the compressed air.

This produces an effect called pumping brake (pumping brake), and a slow braking force is applied to the package to stop the rotation of the package. The ratio of the open time to the close time of the electromagnetic valve is constant during a period from the start of deceleration of the package to the stop of the package.

There is a demand for further complicating the deceleration of the package while monitoring the amount of yarn in the package, the change in the peripheral speed of the package, and the like. However, the yarn winding device described in japanese patent application laid-open No. 2016 and 78995 cannot freely control the pressure in the working chamber because the supply and stop of the compressed air are switched only by the solenoid valve.

The yarn winding device described in jp 2010-37083 a can change the pressure in the working chamber by alternately repeating the supply and stop of the compressed air, but the ratio of the opening time and the closing time of the electromagnetic valve does not change during the deceleration of the package. In other words, the pressure in the working chamber cannot be changed to an arbitrary value during deceleration.

Disclosure of Invention

The present invention aims to adjust the pressure of the fluid supplied to the working chamber to an arbitrary level at any time during deceleration of the package, and to change the magnitude of the braking force applied to the package at any time.

A yarn winding device according to a first aspect of the present invention is a yarn winding device for winding a yarn around a winding bobbin from a yarn supplying portion capable of supplying the yarn to form a package, and includes a braking device including a braking portion for braking rotation of the package, a working chamber for operating the braking portion by a pressure of a fluid inside the braking portion, and a fluid pressure variable portion for changing a pressure of the fluid supplied to the working chamber, the fluid pressure variable portion including a first valve disposed between a fluid supply port connected to a fluid supply source and the working chamber, a second valve disposed between the working chamber and a fluid discharge port, and a fluid pressure control portion for independently opening and closing the first valve and the second valve.

In the present invention, the first valve is a valve for supplying fluid from the fluid supply port to the working chamber, and the second valve is a valve for discharging fluid in the working chamber to the fluid discharge port. When the first valve is opened and the second valve is closed, the pressure of the fluid supplied to the working chamber increases. When the first valve is closed and the second valve is opened, the pressure is decreased. Further, since these valves are independently operated by the fluid pressure control unit, the pressure can be kept constant by closing both valves. With the above configuration, the pressure of the fluid supplied to the working chamber can be adjusted to an arbitrary level at any time during deceleration of the package. Therefore, the magnitude of the braking force applied to the package can be changed as needed.

In the yarn winding device according to the second aspect of the invention, the brake device further includes a pressure detection unit that detects a pressure of the fluid supplied from the fluid pressure variable unit to the working chamber, and the fluid pressure control unit controls the first valve and the second valve based on a value detected by the pressure detection unit so that the pressure of the fluid supplied to the working chamber becomes an instruction pressure.

The fluid pressure control unit controls the first valve and the second valve such that the pressure of the fluid supplied to the working chamber becomes the indicated pressure, based on the value detected by the pressure detection unit. Therefore, the braking force acting on the package can be changed by adjusting the pressure as indicated by the instruction pressure.

In the yarn winding device according to the third aspect of the invention, the instruction pressure is sequentially inputted to the fluid pressure control unit from the outside.

In the present invention, the instruction pressure is sequentially input to the fluid pressure control portion from the outside. That is, the magnitude of the instruction pressure can be changed at any time during the deceleration of the package. Therefore, the magnitude of the braking force applied to the package can be changed as needed according to the situation.

In the yarn winding device according to a fourth aspect of the present invention, in addition to any one of the first to third aspects of the present invention, the brake device further includes a supply switching valve disposed between the first valve of the fluid pressure variable portion and the working chamber, and a supply control portion that controls opening and closing of the supply switching valve.

The supply and non-supply of the fluid from the fluid pressure variable portion to the working chamber are switched by opening and closing the supply switching valve. Therefore, the pressure of the fluid supplied from the fluid pressure variable portion can be further changed, and the fluid can be supplied to the working chamber. Therefore, the braking force applied to the package can be more finely changed.

In the yarn winding device according to a fifth aspect of the present invention, the supply control unit alternately repeats opening and closing of the supply switching valve.

By alternately repeating the opening and closing of the supply switching valve, the supply and non-supply of the fluid to the working chamber are alternately repeated. Thus, the pressure of the fluid supplied to the working chamber is lower than the pressure of the fluid supplied from the fluid pressure variable portion. Therefore, a braking force can be applied to the package more slowly than in the case of using only the fluid pressure variable portion.

In the yarn winding device according to a sixth aspect of the present invention, the supply control unit changes at least one of an open time and a closed time of the supply switching valve.

Since at least one of the opening time and the closing time of the supply switching valve is changed by the supply control unit, the pressure of the fluid supplied from the fluid pressure variable unit to the working chamber can be adjusted. Therefore, the braking force applied to the package can be more finely changed.

A yarn winding device according to a seventh aspect of the present invention is a yarn winding device for winding a yarn around a winding bobbin from a yarn supplying section for supplying the yarn to form a package, the yarn winding device including a braking section for braking rotation of the package, a working chamber for operating the braking section by fluid pressure inside the braking section, a supply switching valve disposed between a fluid supply port connected to a fluid supply source and the working chamber, and a supply control section for controlling opening and closing of the supply switching valve, wherein the supply control section alternately repeats opening and closing of the supply switching valve while changing at least one of an open time and a closed time of the supply switching valve.

The supply switching valve is alternately opened and closed repeatedly, and the supply and non-supply of the fluid to the working chamber are alternately repeated. Therefore, the pressure of the fluid supplied to the working chamber is lower than the pressure of the fluid supply source. Further, by changing at least one of the opening time and the closing time, the pressure of the fluid supplied to the working chamber can be adjusted to an arbitrary pressure at any time during deceleration of the package. Therefore, the braking force applied to the package can be changed as needed.

In the above-described first to seventh aspects of the invention, the yarn winding device according to an eighth aspect of the invention further includes: a contact roller that rotates by contacting with the package, a roller driving section that rotationally drives the contact roller, a package rotational speed detecting section that detects a rotational speed of the package, a contact roller rotational speed detecting section that detects a rotational speed of the contact roller, and a winding control section that controls the braking device and the roller driving section, when decelerating the package while maintaining the state in which the package is in contact with the contact roller and the yarn is being wound into the package, the winding control unit controls the braking device and the roller driving unit so that a difference between the peripheral speed of the package and the peripheral speed of the contact roller falls within a predetermined range, based on a detection result of the package rotation speed detecting unit and a detection result of the contact roller rotation speed detecting unit.

For example, at the time when the package is fully wound, the package may be decelerated while maintaining the state in which the yarn is being wound around the package while the package is in contact with the contact roller. At this time, if the difference in the peripheral speed between the package and the contact roller increases, there is a possibility that a jump, a disturbance in the surface layer of the package, or the like occurs. In the present invention, the pressure of the fluid supplied to the working chamber can be adjusted to an arbitrary pressure at any time during deceleration of the package, and the braking force acting on the package can be changed at any time, so that the difference in the peripheral speed between the package and the contact roller can be reduced, and the above-described problem can be prevented.

In addition to any one of the first to eighth aspects of the invention, a yarn winding device according to a ninth aspect of the invention includes: a yarn accumulating device which is disposed between the yarn supplying section and the package and accumulates the yarn supplied from the yarn supplying section; and a yarn joining device that is disposed between the yarn supplying section and the yarn accumulating device and that connects a yarn end on the yarn supplying section side to a yarn end on the yarn accumulating device side when the yarn between the yarn supplying section and the yarn accumulating device is not connected, wherein the winding control section controls the braking device and the roller driving section to decelerate the package and the contact roller when the yarn is joined by the yarn joining device.

When the yarn is not connected between the yarn supplying section and the yarn accumulating section due to yarn breakage or the like, the yarn accumulated in the yarn accumulating section is pulled out while the yarn joining device is performing yarn joining, and the package formation is continued. In this case, when the package is decelerated so that the yarn accumulated in the yarn accumulating device is not depleted in a state where the yarn is connected between the yarn accumulating device and the package, if a difference between the peripheral speed of the package and the peripheral speed of the contact roller increases, there is a possibility that a jump or a disturbance of the surface layer of the package occurs. In the present invention, the pressure of the fluid supplied to the working chamber can be adjusted to an arbitrary pressure at any time during deceleration of the package, and the braking force acting on the package can be changed at any time, so that the difference in the peripheral speed can be reduced, and the above-described problem can be prevented.

In the yarn winding device according to a tenth aspect of the present invention, in addition to any one of the first to ninth aspects of the present invention, the braking device changes the pressure of the fluid supplied to the working chamber such that the smaller the amount of yarn in the package, the smaller the braking force acting on the package.

The lighter the package is, the smaller the braking force acting on the package can be. Therefore, excessive deceleration of the package can be prevented.

Drawings

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

Fig. 2 is a block diagram showing an electrical configuration of the automatic winder.

Fig. 3 is a schematic side view of the winding unit.

FIG. 4 is a front view of the package forming section.

Fig. 5 is a block diagram of the brake apparatus.

Fig. 6 is a sectional view of the brake cylinder and its surrounding structure.

Fig. 7 is a graph showing a temporal change in the pressure of the compressed air supplied to the working chamber by the air pressure variable portion.

Fig. 8 is a flowchart showing a series of processing when a yarn break or the like occurs.

Fig. 9 is a graph showing a temporal change in the pressure of the compressed air supplied to the working chamber.

Fig. 10 is a block diagram of a brake device according to a modification.

Fig. 11 is an explanatory diagram showing timing of opening and closing of the solenoid valve.

Fig. 12 is a block diagram of a brake device according to another modification.

Fig. 13 is an explanatory diagram showing a temporal change in the pressure of the compressed air.

Fig. 14 is a block diagram of a brake device according to another modification.

Fig. 15 is a schematic side view of a winding unit according to another modification.

Detailed Description

Next, an embodiment of the present invention will be described with reference to fig. 1 to 9. As shown in fig. 1, the direction in which the plurality of winding units are arranged is the left-right direction, and the direction in which gravity acts is the up-down direction. The direction orthogonal to the left-right direction and the up-down direction is referred to as the front-back direction.

Brief structure of automatic winder

First, a schematic configuration of the automatic winder 1 will be described with reference to fig. 1 and 2. Fig. 1 is a front view of an automatic winder 1 according to the present embodiment. Fig. 2 is a block diagram showing an electrical configuration of the automatic winder 1. The automatic winder 1 includes a plurality of winding units 2 (yarn winding devices of the present invention), a doffing device 3, a control device 4, and the like.

The plurality of winding units 2 are arranged side by side in the left-right direction, and each wind the yarn Y unwound from the yarn supplying bobbin Bk onto a winding bobbin Bm (a winding bobbin of the present invention) to form a package 100. The doffing device 3 is disposed above the plurality of winding units 2 and is configured to be movable in the left-right direction. Upon receiving the full-package signal from the winding unit 2, the doffer 3 moves upward of the winding unit 2 to perform operations such as removal of the full-package 100 and attachment of the empty winding bobbin Bm to the winding unit 2. As shown in fig. 2, the control device 4 is electrically connected to a unit control unit 15 (a winding control unit of the present invention) of the winding unit 2 and a control unit (not shown) of the doffing device 3, which will be described later, and performs communication with these control units.

Winding unit

Next, the structure of the winding unit 2 will be described with reference to fig. 2 to 4. Fig. 3 is a schematic side view of the winding unit. Fig. 4 is a front view of the package forming section 12 described later. As shown in fig. 2 and 3, the winding unit 2 includes: a yarn supplying section 11, a package forming section 12, a yarn accumulating section 13, a yarn joining device 33, a clearer 36, a unit control section 15, and the like, which are disposed between the yarn supplying section 11 and the yarn accumulating section 13.

Yarn feeding part

The yarn supplying portion 11 is configured to supply the yarn Y wound around the yarn supplying bobbin Bk, and is disposed at a lower end portion of the winding unit 2. As shown in fig. 3, the yarn supplying portion 11 mainly includes a yarn supplying bobbin supporting portion 21.

The yarn supplying bobbin support portion 21 supports the yarn supplying bobbin Bk in a substantially upright state. The yarn supplying bobbin support portion 21 is configured to be able to discharge an empty yarn supplying bobbin Bk. When the empty yarn supplying bobbin Bk is discharged, a new yarn supplying bobbin Bk is supplied to the yarn supplying bobbin supporting portion 21 from a bobbin supplying device not shown.

Package forming section

The package forming section 12 is for winding the yarn Y around the winding bobbin Bm to form the package 100, and is disposed at the upper end of the winding unit 2. As shown in fig. 3 and 4, the package forming section 12 includes a cradle 51 (support section of the present invention), a traverse drum 52 (contact roller of the present invention), a brake device 53, and the like.

As shown in fig. 4, the cradle 51 has a pair of

cradle arms

51a, 51 b. The

swing arms

51a and 51b are supported to be rotatable about the shaft 54 and rotatable in a direction approaching or separating from the traverse drum 52.

Bobbin holders 56 and 57 for rotatably holding the winding bobbin Bm are attached to the ends of the

cradle arms

51a and 51 b. The bobbin holders 56, 57 have holder

main bodies

58, 59 fitted to the ends of the winding bobbin Bm in the rotation axis direction, respectively. In the present embodiment, the cradle 51 is configured to be able to mount a tapered winding bobbin Bm. The holder

main bodies

58 and 59 are fitted to the large-diameter side end and the small-diameter side end of the winding bobbin Bm, respectively, and rotate integrally with the winding bobbin Bm.

A brake cylinder 60 described later is built in the bobbin holder 56. A package rotation speed sensor 61 (a package rotation speed detecting section of the present invention) is disposed near the bobbin holder 57, detects the rotation speed of the package 100, and outputs the detected rotation speed to the unit control section 15.

The traverse drum 52 is rotationally driven by a drum drive motor 62 (a roller drive section of the present invention). The traverse roller 52 rotates in a state where the package 100 is in contact with the traverse roller 52, and the winding bobbin Bm and the package 100 are driven to rotate.

A traverse groove 52a is formed on the outer peripheral surface of the traverse drum 52. The traverse drum 52 reciprocates (traverses) the yarn Y at a predetermined width by rotating the yarn Y while passing through the traverse groove 52 a.

A drum rotation speed sensor 63 (contact roller rotation speed detection unit of the present invention) is disposed in the vicinity of the traverse drum 52. The drum rotation speed sensor 63 detects the rotation speed of the traverse drum 52 and outputs the detected rotation speed to the unit control unit 15.

The braking device 53 is used to brake the rotation of the package 100. As will be described in detail later.

Yarn accumulating part

The yarn accumulating portion 13 is for temporarily accumulating the yarn Y unwound from the yarn supplying bobbin Bk, and is disposed below the package forming portion 12. As shown in fig. 3, the yarn accumulating section 13 mainly includes a yarn accumulating drum 41, a drum driving motor 42, a yarn guide member 43, and an upper yarn blowing-down device 44.

The yarn accumulating drum 41 is a substantially cylindrical member, and accumulates the yarn Y by winding the yarn Y around the outer peripheral surface thereof. The drum drive motor 42 rotationally drives the yarn accumulating drum 41. The yarn guide member 43 is a tubular member, and one end portion thereof is disposed to face an end portion in the rotation axis direction of the yarn accumulating drum 41. The yarn Y traveling from the yarn supplying portion 11 side travels inside the yarn guide 43 and is guided to the yarn accumulating drum 41. The upper yarn-blowing device 44 is disposed adjacent to the yarn guide member 43. The upper yarn blowing device 44 is connected to a compressed air source, and blows the yarn Y on the upper side (the yarn accumulating portion 13 side) during yarn joining described later.

When the drum drive motor 42 rotationally drives the yarn accumulating drum 41, the yarn Y is guided to the yarn accumulating drum 41 by the yarn guide member 43 and wound around the outer peripheral surface of the yarn accumulating drum 41. The wound yarn Y is drawn from the yarn accumulating drum 41 and wound into the package 100 by rotating the traverse drum 52 and the package 100 by the drum driving motor 62 of the package forming section 12. Since the yarn Y is stored in the yarn storage section 13 in this manner, for example, even when a yarn joining operation described below is performed, the yarn Y can be drawn out from the yarn storage section 13, and the winding operation of the yarn Y by the package forming section 12 can be continued.

Yarn splicing device

As shown in fig. 3, the yarn joining device 33 is disposed between the yarn supplying portion 11 and the yarn accumulating portion 13. The yarn joining device 33 is used to join the yarn Y on the yarn supplying section 11 side (hereinafter, referred to as a lower yarn Y1) and the yarn Y on the yarn accumulating section 13 side (hereinafter, referred to as an upper yarn Y2) when the yarn Y between the yarn supplying section 11 and the yarn accumulating section 13 is in an unconnected state. When the yarn Y is in an unconnected state, there are a case where the yarn is broken by tension, a case where the yarn is cut by the occurrence of a yarn defect, a case where the yarn supplying bobbin Bk is replaced, and the like. As the yarn joining device 33, for example, a compressed air type device can be used. The yarn joining device 33 blows compressed air to the lower yarn Y1 and the upper yarn Y2 to temporarily separate both ends, and then blows compressed air again to both ends to wind the ends together to join the yarns.

Yarn cleaner

As shown in fig. 3, the clearer 36 is disposed between the yarn supplying portion 11 and the yarn accumulating portion 13. The yarn clearer 36 monitors the thickness and the like of the yarn Y to detect a yarn defect. A not-shown cutter for cutting the yarn Y is disposed near the clearer 36. When a yarn break occurs or a bobbin is replaced, the yarn clearer 36 detects the absence of the yarn Y and outputs a detection signal to the unit control unit 15. When a yarn defect is detected, the cutter immediately cuts the yarn Y, and the clearer 36 outputs a detection signal to the unit control unit 15.

Structure between yarn feeding part and yarn accumulating part

The winding unit 2 includes various devices between the yarn supplying portion 11 and the yarn accumulating portion 13, in addition to the yarn joining device 33 and the clearer 36. As shown in fig. 3, the yarn unwinding assisting device 22, the lower yarn blowing-up device 31, the upper yarn catching device 32, the lower yarn catching device 34, the tension applying device 35, and the like are arranged in this order from the lower side toward the upper side. In the present embodiment, the yarn joining device 33 is disposed between the upper yarn catching device 32 and the lower yarn catching device 34, and the clearer 36 is disposed above the tension applying device 35.

The yarn unwinding assisting device 22 is disposed above the yarn supplying portion 11. The yarn unwinding assisting device 22 includes a regulating member 23, and suppresses the expansion of the yarn Y due to a centrifugal force at the time of unwinding by bringing the regulating member 23 into contact with the yarn Y unwound from the yarn supplying bobbin Bk from above.

The lower yarn blowing device 31 is connected to a compressed air source to blow the lower yarn Y1. The upper yarn catching device 32 is connected to a negative pressure source, and attracts and catches the upper yarn Y2. The lower yarn catching device 34 is connected to a negative pressure source, and sucks and catches the lower yarn Y1 blown up by the lower yarn blowing device 31. The tension applying device 35 has, for example, fixed comb teeth and movable comb teeth, and applies a predetermined tension to the yarn Y.

In addition, a tubular yarn guide member 38 is disposed in the vertical direction from the position where the upper yarn catching device 32 is disposed to the position where the upper yarn blowing device 44 is disposed. The upper end opening of the yarn guide member 38 faces the upper yarn doffing device 44, and the lower end opening faces the upper yarn catching device 32. A slit, not shown, is provided in the longitudinal direction in the side wall of the yarn guide member 38.

When the yarn is cut by the clearer 36, the yarn joining operation is performed by the yarn joining device 33, the yarn accumulating portion 13, and the like as follows. First, the rotation of the drum drive motor 42 of the yarn accumulating section 13 is stopped, and the yarn accumulating drum 41 is stopped. The lower yarn catching device 34 sucks and catches the lower yarn Y1 formed by the yarn cutting of the yarn clearer 36, and guides the lower yarn Y1 to the yarn joining device 33. Further, the upper yarn blowing device 44 draws the upper yarn Y2 attached to the surface of the yarn accumulating drum 41 and blows it down toward the yarn guide member 38. The upper yarn Y2 blown down is guided from the opening at the upper end to the opening at the lower end of the yarn guide member 38. The upper yarn catching device 32 sucks and catches the yarn end of the upper yarn Y2, and the upper yarn Y2 is taken out from the slit of the yarn guide member 38 and guided to the yarn joining device 33. The yarn joining device 33 connects the guided lower yarn Y1 with the upper yarn Y2.

Unit control unit

The Unit control Unit 15 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The unit control unit 15 controls each unit by the CPU based on a program stored in the ROM. Specifically, the reception of signals from the yarn clearer 36, the drum rotation speed sensor 63, the package rotation speed sensor 61, the air pressure variable section 71 described later, and the like, and the operations of the yarn unwinding assisting device 22, the yarn splicing device 33, the drum drive motor 42, the drum drive motor 62, the air pressure variable section 71, and the like are controlled.

Detailed construction of brake device

Next, a detailed configuration of the braking device 53 of the package forming section 12 will be described with reference to fig. 4 to 6. Fig. 5 is a schematic diagram showing the brake device 53. Fig. 6 is a schematic cross-sectional view of brake cylinder 60 and its peripheral structure. As shown in fig. 5, the brake device 53 includes a brake cylinder 60, an air pressure variable portion 71 (a fluid pressure variable portion according to the present invention) for changing the pressure of compressed air supplied to a working chamber 76 of the brake cylinder 60 described later, a pressure gauge 86 (a pressure detecting portion according to the present invention), and the like.

As described above, the brake cylinder 60 is built in the bobbin bracket 56. As shown in fig. 6, brake cylinder 60 includes a housing 72, a bearing sleeve 73, a rotation support portion 74, and the like.

The housing 72 is attached to the distal end portion of the rocker arm 51 a. The bearing sleeve 73 is fitted to the housing 72 so as to be movable and non-rotatable, and a brake shoe 75 (brake unit of the present invention) is provided at a distal end thereof. A working chamber 76 is formed by the inner wall of the housing 72 and the bearing sleeve 73. The working chamber 76 has an opening and is configured to be able to supply compressed air. A spring 77 for biasing the bearing sleeve 73 toward the holder main body 58 is disposed between the housing 72 and the bearing sleeve 73.

The rotation support portion 74 is provided inside the bearing sleeve 73. A shaft 78 is attached to the holder main body 58, and the rotation support portion 74 rotatably supports the shaft 78. A spring 79 for biasing the rotation support portion 74 toward the holder main body 58 is disposed between the bearing sleeve 73 and the rotation support portion 74.

The air pressure variable portion 71 is used to change the pressure of the compressed air supplied to the working chamber 76 of the brake cylinder 60. As shown in fig. 5, the air pressure variable portion 71 includes an electromagnetic valve 81 (a first valve of the present invention), an electromagnetic valve 82 (a second valve of the present invention), an air pressure control portion 83 (a fluid pressure control portion of the present invention), and the like.

The

solenoid valves

81, 82 are both normally closed type two-way solenoid valves. The solenoid valve 81 is disposed between a supply port 84 (a fluid supply port of the present invention) connected to a supply source of compressed air (a fluid supply source of the present invention) and the working chamber 76. The inlet side of the solenoid valve 81 is connected to the supply port 84, and the outlet side is connected to the working chamber 76 and the outlet side of the solenoid valve 82. The solenoid valve 82 is disposed between the working chamber 76 and an exhaust port 85 (a fluid discharge port of the present invention) connected to the outside. The inlet side of the solenoid valve 82 is connected to the working chamber 76 and the outlet side of the solenoid valve 81, and the outlet side is connected to an exhaust port 85. The air pressure control unit 83 opens and closes the solenoid valve 81 and the solenoid valve 82 independently. The air pressure control unit 83 receives an instruction pressure from, for example, the unit control unit 15.

The solenoid valve 81 switches between supplying compressed air from the supply port 84 to the working chamber 76 and shutting off the compressed air from the working chamber 76. The solenoid valve 82 switches whether to discharge the compressed air to the exhaust port 85 or to block the compressed air from the exhaust port 85. When the solenoid valve 81 is opened and the solenoid valve 82 is closed, the compressed air flows as indicated by the solid arrow in fig. 5, and the compressed air is supplied from the supply port 84 to the working chamber 76, so that the pressure of the compressed air in the working chamber 76 is increased. Further, when the solenoid valve 81 is closed and the solenoid valve 82 is opened, the compressed air flows as indicated by the broken line arrow in fig. 5, and the compressed air is discharged from the working chamber to the exhaust port 85, whereby the pressure is decreased. Since the

solenoid valves

81 and 82 are independently operated by the air pressure control unit 83, both the

solenoid valves

81 and 82 are closed, so that the compressed air is not supplied and is not discharged, and the pressure is kept constant.

The pressure gauge 86 is disposed between the solenoid valve 81 and the working chamber 76, detects the pressure of the compressed air supplied to the working chamber 76, and outputs the detected pressure to the air pressure control unit 83. The air pressure control unit 83 controls the

electromagnetic valves

81 and 82 based on the detection value of the pressure gauge 86 so that the pressure becomes the instruction pressure.

The temporal change in the pressure by the air pressure variable portion 71 will be described with reference to fig. 7. In fig. 7, the initial pressure is P0. The command pressure is sequentially input to the air pressure control unit 83 from the unit control unit 15 and the like. At time T0, when P1, which is larger than P0, is inputted as the instruction pressure from the unit controller 15 or the like, for example, the air pressure controller 83 opens the solenoid valve 81, closes the solenoid valve 82, and increases the pressure to P1. At time T1, when P2, which is lower than P1, is input as the instruction pressure, the air pressure controller 83 closes the solenoid valve 81, opens the solenoid valve 82, and lowers the pressure to P2. When another instruction pressure is input at time T2, the air pressure control unit 83 controls the

solenoid valves

81 and 82 in the same manner to change the pressure. In this way, the pressure of the compressed air supplied to the working chamber 76 is adjusted by the air pressure changing unit 71 to any pressure equal to or lower than the pressure Pmax of the compressed air of the supply source as needed.

With the above configuration, the bearing sleeve 73 moves in the rotation axis direction of the winding bobbin Bm in accordance with the pressure of the compressed air supplied to the working chamber 76. That is, the bearing sleeve 73 moves toward the holder main body 58 closer to the bobbin holder 56 when the pressure is increased, and moves away from the holder main body 58 when the pressure is decreased. In a state where compressed air is not supplied to the working chamber 76 or a state where low-pressure compressed air is supplied to the extent that the brake shoe 75 does not contact the holder main body 58, the holder main body 58 is not braked and can freely rotate relative to the bearing sleeve 73. At this time, the holder main body 58 is biased toward the winding bobbin Bm side by the

springs

77 and 79 and the low-pressure compressed air via the shaft 78. Thereby, the winding bobbin Bm is rotatably held.

On the other hand, when high-pressure compressed air is supplied to the working chamber 76, the bearing sleeve 73 moves toward the holder main body 58, and the brake shoe 75 comes into contact with the holder main body 58. Thereby, frictional resistance between the brake shoe 75 and the holder main body 58 is generated to brake the rotation of the holder main body 58, and the winding bobbin Bm and the package 100 rotating integrally with the holder main body 58 are decelerated. The magnitude of the braking force for decelerating the rotation of the package 100 changes in accordance with the magnitude of the frictional force generated between the brake shoe 75 and the holder main body 58, and the magnitude of the frictional force changes in accordance with the pressure of the compressed air in the working chamber 76.

As described above, the pressure of the compressed air supplied to the working chamber 76 can be adjusted to any pressure equal to or lower than the pressure of the compressed air of the supply source as needed by the air pressure variable portion 71. Therefore, the magnitude of the braking force applied to the package 100 can be changed as needed.

Further, based on the detection value of the pressure gauge 86, the air pressure control unit 83 controls the

solenoid valves

81 and 82 so that the pressure of the fluid supplied to the working chamber 76 becomes the instruction pressure. Therefore, the pressure can be adjusted as indicated, and the braking force acting on the package 100 can be changed.

The instruction pressure is sequentially input to the air pressure control unit 83 from the unit control unit 15 or the like, and the magnitude of the instruction pressure can be changed at any time during the deceleration of the package 100. Therefore, the magnitude of the braking force applied to the package 100 can be appropriately changed according to the situation.

As described above, the brake device 53 of the present embodiment can freely control the pressure in the working chamber 76 to an arbitrary pressure by changing the pressure of the compressed air supplied from the air pressure variable portion 71 to the working chamber 76. By using the braking device 53 described above, it is possible to perform appropriate deceleration in accordance with a situation such as a change in the peripheral speed of the package 100 when decelerating the package 100, and it is possible to suppress, for example, a decrease in the quality of the package 100. As an example thereof, control for decelerating the package 100 when a yarn break or the like occurs is described below.

As described above, the winding unit 2 includes the yarn accumulating portion 13, and can perform yarn joining while continuing the winding operation of the yarn Y by consuming the yarn Y accumulated in the yarn accumulating portion 13 even during yarn joining. However, in the event of a failed yarn joining, since there is a concern that the yarn Y stored in the yarn storage section 13 runs out, the package 100 is decelerated at the time of yarn joining to perform control for suppressing consumption of the yarn Y in the yarn storage section 13.

At this time, the winding speed of the package 100 is decelerated as quickly as possible, but if the deceleration is too rapid, the yarn on the surface layer of the package 100 is damaged or a jump occurs due to the sliding between the traverse roller 52 and the package 100, which leads to a decrease in package quality. Therefore, the pressure in the working chamber 76 is controlled by the braking device 53 in the following manner, so that the package 100 is decelerated appropriately so that the package quality is not lowered as much as possible.

A series of control of a unit control section when yarn breakage or the like occurs

A series of control including the deceleration process of the package 100 by the unit control section 15 when a yarn break occurs will be described below with reference to fig. 8 and 9.

First, the unit control section 15 drives the drum drive motor 62 to rotate the traverse drum 52 in a state where the package 100 is in contact with the traverse drum 52, and winds the yarn Y around the package 100. The low-pressure compressed air is supplied to the working chamber 76 of the brake cylinder 60, and the package 100 is not braked. In other words, the peripheral speed of the package 100 is substantially equal to the peripheral speed of the traverse roller 52. The unit control unit 15 controls the drum drive motor 42 to rotate the yarn accumulating drum 41, and keeps the amount of accumulated yarn Y in the yarn accumulating unit 13 at an appropriate amount. The yarn winding operation in this state is hereinafter referred to as a normal winding operation. The peripheral speed of the package 100 and the traverse roller 52 in the normal winding operation is, for example, 1500 m/min.

In the case where the yarn Y between the yarn supplying portion 11 and the yarn accumulating portion 13 is not connected due to the occurrence of yarn breakage, yarn cutting, bobbin replacement, or the like during the normal winding operation, a signal of the occurrence of yarn breakage or the like is output from the yarn clearer 36 and input to the unit control portion 15 as shown in fig. 8 (S101). At this time, the winding unit 2 of the present embodiment draws the yarn Y from the yarn accumulating portion 13 while performing a yarn joining process described later, and continues winding the yarn Y into the package 100. However, at this time, a deceleration process of decelerating the package 100 and the traverse drum 52 to slow the winding speed of the yarn is performed in parallel with the yarn joining process so that the yarn Y stored in the yarn storage section 13 is not depleted (S102).

The deceleration processing will be described in detail. When continuing the winding of the yarn Y into the package 100 while performing the yarn joining process, the unit control section 15 needs to decelerate the package 100 and the traverse drum 52 so that the yarn Y stored in the yarn storage section 13 is not depleted, and temporarily slow down the winding speed of the yarn Y. Specifically, the peripheral speed of the package 100 and the traverse drum 52 needs to be reduced from 1500m/min to 300m/min, for example.

The unit control section 15 reads the target circumferential speed of the traverse drum 52, controls the drum drive motor 62, and starts deceleration of the traverse drum 52. At the same time, the unit control unit 15 reads the command pressure at the start of deceleration and outputs the command pressure to the air pressure variable unit 71. The air pressure control unit 83 supplies compressed air to the working chamber 76 based on the input instruction pressure, and starts deceleration of the package 100.

During the deceleration of the package 100 and the traverse drum 52, the unit control section 15 calculates a difference (slip amount) between the peripheral speed of the package 100 and the peripheral speed of the traverse drum 52 at any time. The circumferential speed of the traverse drum 52 is calculated based on the detection result of the drum rotation speed sensor 63 and the diameter of the traverse drum 52 stored in advance in the ROM or the like. The peripheral speed of the package 100 is controlled based on the detection result of the package rotation speed sensor 61 and the detection result of the drum rotation speed sensor 63. More specifically, at the start of deceleration, the ratio of the detection result of the package rotational speed sensor 61 to the detection result of the drum rotational speed sensor 63 is determined. In the case of this ratio, the peripheral speed of the package 100 is assumed to be equal to the peripheral speed of the traverse drum 52, and the deceleration control is performed based on this ratio in consideration of the slip amount.

Fig. 9 is a graph showing an example of a temporal change in the pressure of the compressed air supplied to the working chamber 76 after the start of deceleration of the package 100. The pressure P0 at the initial stage, i.e., before the start of deceleration, is the low pressure. The pressure after the start of the deceleration process is higher than P0. During the deceleration process, the unit control unit 15 sequentially outputs the instruction pressure to the air pressure control unit 83, and controls the air pressure variable unit 71 so that the slip amount falls within a predetermined range as needed. That is, if the deceleration of the package 100 is excessive, the instruction pressure is decreased to weaken the deceleration, and if the deceleration of the package 100 is insufficient, the instruction pressure is increased to strengthen the deceleration. The air pressure varying unit 71 can adjust the pressure to an arbitrary pressure equal to or lower than Pmax as needed, and thus the above control can be performed.

The magnitude of the indicated pressure may also vary depending on the amount of yarn in the package 100. When the package 100 is light, if the braking force by the braking device 53 is too large, the package 100 may be decelerated too much. As described above, the unit control portion 15 outputs the instruction pressure so that the slip amount converges to the predetermined range. Therefore, when the package 100 is light, the entire instruction pressure is reduced (see fig. 9 (a)). Conversely, when the package 100 is heavy, the entire instruction pressure increases (see fig. 9 (b)). Based on the instruction pressure, the air pressure control unit 83 changes the pressure so that the smaller the yarn amount, the smaller the braking force acting on the package 100.

The control unit control section 15 for controlling the slippage determines whether or not the winding speed of the yarn Y into the package 100 reaches the target value while performing the slippage described above. When the peripheral speed of the package 100 reaches the target value, the unit control section 15 maintains the peripheral speed. If the peripheral speed of the package 100 does not reach the target value, the deceleration process is continued.

When the depletion of the yarn Y in the yarn accumulating portion 13 can be expected even if the above-described deceleration process is performed, the unit control portion 15 controls the braking device 53 and the drum drive motor 62 to stop the package 100 and the traverse drum 52.

In parallel with the above-described deceleration process, the unit control section 15 performs a yarn splicing process. The unit control unit 15 controls the drum drive motor 42 to stop the yarn accumulating drum 41. Then, as described above, the unit controller 15 controls the yarn joining device 33 to guide the lower yarn Y1 and the upper yarn Y2 to the yarn joining device 33 to join the yarns. During the yarn joining process, the unit control section 15 also drives the drum drive motor 62 to rotate the traverse drum 52 and the package 100, draws the yarn Y from the yarn accumulating section 13, and continues winding the yarn Y into the package 100. However, at this time, since the yarn accumulating drum 41 is stopped, the amount of accumulated yarn Y is reduced.

Next, the unit control portion 15 controls the drum drive motor 42 to rotate the yarn accumulating drum 41, and starts accumulating the yarn Y in the yarn accumulating portion 13 again. In order to increase the yarn Y of the reduced yarn accumulating portion 13 as rapidly as possible, the unit control portion 15 accelerates the yarn accumulating drum 41 to rotate at a rotation speed higher than that in the normal winding operation (S103). Finally, the unit control section 15 controls the drum drive motor 62 to accelerate the traverse drum 52 and return the winding speed of the yarn Y to the speed in the normal winding operation (S104). At this time, the rotation speed of the yarn accumulating drum 41 is also returned to the rotation speed in the normal winding operation.

As described above, in the present invention, the pressure of the compressed air supplied to the working chamber 76 can be adjusted to an arbitrary pressure as needed during deceleration of the package 100, and the braking force acting on the package 100 can be changed as needed. Therefore, when the package 100 and the traverse drum 52 are decelerated from a state in which the package 100 and the traverse drum 52 are in contact with each other and the yarn is connected to wind the yarn Y, the traverse drum 52 follows the package 100 while decelerating at the maximum efficiency, and the difference in the peripheral speed between the package 100 and the traverse drum 52 can be reduced. Therefore, troubles such as jumping and yarn breakage can be prevented.

When the yarn between the yarn supplying portion 11 and the yarn accumulating portion 13 is disconnected due to yarn breakage or the like, the yarn Y accumulated in the yarn accumulating portion 13 is pulled out while the yarn joining is performed by the yarn joining device 33, and the formation of the package 100 is continued. In this case, when the package is decelerated so that the yarn accumulated in the yarn accumulating portion 13 is not depleted in a state where the yarn is connected between the yarn accumulating portion 13 and the package 100, if a difference between the peripheral speed of the package 100 and the peripheral speed of the traverse drum 52 increases, there is a possibility that a jump, a disturbance of the surface layer of the package, or the like occurs. In the present invention, the pressure of the compressed air supplied to the working chamber 76 can be adjusted to an arbitrary pressure at any time during the deceleration of the package 100, and the braking force acting on the package 100 can be changed at any time, so that the difference in the peripheral speed can be easily controlled, and the above-described problem can be prevented.

Further, the lighter the package 100 is, the smaller the braking force acting on the package 100 can be, and therefore, the excessive deceleration of the package 100 can be prevented.

Next, a modified example of the above embodiment will be described. Here, the same reference numerals are given to members having the same configurations as those of the above-described embodiment, and descriptions thereof are appropriately omitted.

(1) The structure of the brake device may be changed. In fig. 10, the brake device 91 includes an electromagnetic valve 87 (supply switching valve according to the present invention) and a supply control unit 88, instead of the air pressure varying unit 71 according to the above embodiment.

The solenoid valve 87 is a three-way solenoid valve of a normally closed type. The solenoid valve 87 is disposed between the solenoid valve 81 of the air pressure variable portion 71 and the working chamber 76. The supply port side of the solenoid valve 87 is connected to the outlet side of the solenoid valve 81 and the inlet side of the solenoid valve 82. The exhaust port side of the solenoid valve 87 is connected to the exhaust port 85. The cylinder port side of the solenoid valve 87 is connected to the working chamber 76. The supply control unit 88 controls on/off switching (opening/closing) of the electromagnetic valve 87. Timing data of opening and closing of the solenoid valve 87 is output from, for example, the unit control unit 15. When the solenoid valve 87 is energized (on state), the supply port side of the solenoid valve 87 is opened and the exhaust port side is closed, and compressed air flows as indicated by solid arrows in fig. 10, and compressed air is supplied from the supply port 84 to the working chamber 76. When the energization of the solenoid valve 87 is stopped (off state), the supply port side of the solenoid valve 87 is closed and the exhaust port side is opened, and the compressed air is made to flow as indicated by the broken line arrow in fig. 10, and the compressed air is discharged from the working chamber 76 to the exhaust port 85.

The temporal change in the pressure of the compressed air supplied to the working chamber 76 during the deceleration process will be described with reference to fig. 11. The ROM or the like of the unit control unit 15 stores a plurality of kinds of setting data for switching the opening/closing timing of the electromagnetic valve 87 at regular intervals. As an example, fig. 11 (a) shows a graph in which setting data in which an on state and an off state are alternately repeated twice for a certain period a and the on time (the on time of the present invention) is shorter than the off time (the off time of the present invention) is graphed. Similarly, fig. 11 (b) is a graph of setting data in which the on time is longer than the off time. When setting data such as (b) of fig. 11 is read, the pressure is likely to rise because the on time is longer than that of (a) of fig. 11. The time period a is, for example, a short time such as 0.1 second. Of course, the setting data is not limited to the above data. For example, the on-time and the off-time may also be equal. The first on-time and the second on-time may also be different. The number of iterations may not be two.

The unit control section 15 calculates the difference in the peripheral speeds of the package 100 and the traverse drum 52 as needed during the deceleration, and reads the optimum data among the setting data of the timing of switching the on/off of the electromagnetic valve 87 based on the difference in the peripheral speeds at that time. For example, as shown in fig. 11 (c), three types of setting data having different ratios of on-time to off-time are sequentially read. When the setting data is sequentially input from the unit control unit 15 to the supply control unit 88, the supply control unit 88 alternately repeats the opening and closing of the electromagnetic valve 87 while changing the on time and the off time based on the setting data. As a result, as shown in fig. 11 (d), the pressure changes with time at a pressure equal to or lower than the pressure Pmax. Therefore, although the pressure adjustment is not so fine as in the case of using the air pressure varying section 71, the pressure can be adjusted to an arbitrary level at any time by performing feedback based on the peripheral speed difference during deceleration of the package 100, unlike the control of the conventional pump gate. Therefore, the braking force applied to the package 100 can be changed as needed.

(2) The brake device may be additionally configured. In fig. 12, the brake device 92 further includes the solenoid valve 87 described above disposed between the solenoid valve 81 of the air pressure varying unit 71 and the working chamber 76, and the supply control unit 88. As for the flow of the compressed air by the air pressure variable portion 71, like fig. 5 described above, the solid line arrows indicate supply, and the broken line arrows indicate exhaust. The black arrows indicate supply, and the hatched arrows indicate exhaust, as flows of compressed air caused by opening and closing of the solenoid valve 87.

The temporal change in the pressure of the compressed air supplied to the working chamber 76 during the deceleration process will be described with reference to fig. 13. Fig. 13 (a) is a diagram showing a temporal change in the pressure of the compressed air supplied from the air pressure variable portion 71 (the pressure of the compressed air between the solenoid valve 81 and the solenoid valve 87). Fig. 13 (b) is a diagram in which setting data of the on/off switching timing of the solenoid valve 87 is graphed. The ratio of the on time to the off time and the variation thereof are the same as those in the case shown in fig. 11 (c) described above. In other words, in this modification, the on time and the off time of the electromagnetic valve 87 are fed back based on the difference in the peripheral speed between the package 100 and the traverse drum 52. When the setting data is sequentially input from the unit control unit 15 to the supply control unit 88, the supply control unit 88 alternately repeats the opening and closing of the electromagnetic valve 87 while changing the on time and the off time based on the setting data.

Fig. 13 (c) is a graph showing the result of the temporal change in the pressure of the compressed air supplied to the working chamber 76 by the solenoid valve 87. The double-dashed line indicates the pressure of the compressed air supplied from the air pressure variable portion 71 in fig. 13 (a). By alternately repeating the opening and closing of the solenoid valve 87, the pressure of the compressed air in the working chamber 76 becomes lower than the pressure of the compressed air supplied from the air pressure variable portion 71. Since the on time and the off time of the electromagnetic valve 87 are changed, the pressure of the compressed air supplied from the air pressure variable portion 71 to the working chamber 76 can be adjusted. Therefore, the braking force applied to the package 100 can be more finely changed.

In this modification, the ratio of the on time to the off time of the solenoid valve 87 may be constant during the deceleration process. The solenoid valve 87 may be a two-way solenoid valve that switches between supplying and shutting off the compressed air to the working chamber 76.

(3) A further brake configuration may also be used. In fig. 14, the brake device 93 includes an air pressure switching unit 94 instead of the air pressure variable portion 71 of the brake device 92 shown in fig. 12. The air pressure switching unit 94 is connected to the supply port 84. The air pressure switching means 94 is also connected to a supply port 95, and the supply port 95 is connected to a supply source of compressed air having a pressure lower than the pressure of the supply source of compressed air connected to the supply port 84. The air pressure switching means 94 is configured to be able to switch whether or not any one of the relatively high-pressure compressed air from the supply port 84 and the relatively low-pressure compressed air from the supply port 95 is supplied to the solenoid valve 87 side. The air pressure switching unit 94 is controlled by the unit control section 15. In fig. 14, when the compressed air is supplied from the supply port 84, the compressed air flows as indicated by the solid arrows. When the compressed air is supplied from the supply port 95, the compressed air flows as indicated by the arrows drawn with solid lines and hatched.

In the above configuration, for example, when a weak braking force acts on the package 100 by decelerating the package 100 having a small winding diameter and being light, the unit control unit 15 controls the air pressure switching unit 94 to switch the supply of the compressed air from the supply port 95. As described above, the supply control unit 88 controls the solenoid valve 87 and alternately repeats the on/off of the solenoid valve 87. Thus, although the pressure adjustment is not fine as in the case of using the air pressure variable portion 71, the pressure can be fine adjusted as compared with the case of using only the electromagnetic valve 87 as in the modification (1). The number of supply ports is not limited to two, and increasing the number thereof enables more precise pressure adjustment.

(4) In the braking devices 91 to 93, only one of the on time and the off time of the solenoid valve 87 may be changed.

(5) The

brake devices

53, 91, 92, 93 may not have the pressure gauge 86. For example, a table showing the relationship between the command pressure and the opening/closing timing of each solenoid valve may be stored in advance in the ROM of the unit control unit 15. Alternatively, a program for calculating the timing of the opening and closing based on the instruction pressure may be incorporated in the unit control unit 15 in advance.

(6) The instruction pressure may be input to the air pressure control unit 83 from the outside other than the unit control unit 15, such as the control device 4. Alternatively, the indicated pressure may be input by the operator.

(7) The air pressure variable unit 71 may not include the air pressure control unit 83, and the unit control unit 15 may control the air pressure variable unit 71 as the air pressure control unit. The brake devices 91 to 93 may not have the supply control section 88, and the unit control section 15 may control the solenoid valve 87 as the supply control section.

(8) During the deceleration process, the unit control section 15 may control the drum drive motor 62 together with the control of the brake device 53 so that the slip amount falls within a predetermined range, thereby finely adjusting the peripheral speed of the traverse drum 52.

(9) The package forming section 12 may include a lift cylinder (not shown) for rotating the cradle 51. That is, when the package 100 and the traverse drum 52 need to be abruptly stopped, the cradle 51 may be rotated to separate the package 100 from the traverse drum 52.

(10) A pivot angle sensor (not shown) that detects the pivot angle of the

cradle arms

51a and 51b and outputs the detected pivot angle to the unit control unit 15 may be attached to the shaft 54 of the cradle 51. That is, since the

swing arms

51a and 51b rotate in accordance with the package diameter and the detection result of the rotation angle sensor changes, the unit control section 15 may calculate the peripheral speed and the yarn amount of the package 100 based on the detection results of the rotation angle sensor and the package rotation speed sensor 61.

(11) The winding unit may not include the yarn accumulating portion 13. Fig. 15 shows the winding unit 10 without the yarn accumulating section 13. The winding unit 10 includes, as a structure for guiding the yarn Y to the yarn joining device 33, an upper yarn catching guide member 96 having a suction nozzle for sucking and catching the upper yarn Y2 on the package forming section 12 side, a lower yarn catching guide member 97 having a suction nozzle for sucking and catching the lower yarn Y1 on the yarn supplying section 11 side, and the like. During yarn joining, the lower yarn Y1 and the upper yarn Y2 are guided to the yarn joining device 33 by the upper yarn catching guide 96 and the lower yarn catching guide 97, respectively.

When the yarn splicing operation of the winding unit 10 is performed, the unit control section 15 controls the lift cylinder described in the modification (9) above to rotate the cradle 51, separates the package 100 from the traverse drum 52, and then stops the package 100 and the traverse drum 52. In this way, in the winding unit 10, the package 100 is not decelerated as in the above-described embodiment when the yarn is connected. However, for example, when the package 100 is fully wound, the package 100 and the traverse drum 52 may be decelerated while maintaining the state of the yarn Y being wound. In the above case, since the braking force applied to the package 100 can be freely adjusted, the amount of slippage can be reduced. Therefore, troubles such as jumping and yarn breakage can be prevented.

(11) The package 100 may be rotated by a structure other than the traverse roller 52. For example, the package 100 may be driven to rotate by rotating a contact roller without a traverse groove, and the yarn Y may be traversed by a traverse guide independent from the contact roller.

(12) The yarn joining device 33 is not limited to the compressed air type, and may be a mechanical type, for example.

(13) Fluid other than compressed air, such as oil, may be supplied to working chamber 76.

(14) The winding bobbin Bm is not limited to a cone type, and may be a bobbin type (cylindrical shape).

(15) The present invention is not limited to the winding unit 2, and can be applied to a yarn winding device such as a spinning unit (see, for example, japanese patent application laid-open No. 2013-253353). In this case, an air spinning device or the like that generates spun yarn corresponds to the yarn supplying portion 11.

Claims

1. A yarn winding device for winding a yarn around a winding bobbin from a yarn supplying section capable of supplying the yarn to form a package,

a brake device including a brake section for braking rotation of the package, a working chamber for operating the brake section by a pressure change of a fluid, and a fluid pressure changing section for changing a pressure of the fluid supplied to the working chamber,

the fluid pressure variable portion includes a first valve disposed between a fluid supply port connected to a fluid supply source and the working chamber, a second valve disposed between the working chamber and a fluid discharge port, and a fluid pressure control portion that opens and closes the first valve and the second valve independently.

2. The yarn winding device according to claim 1,

the brake device further includes a pressure detection unit that detects a pressure of the fluid supplied from the fluid pressure variable unit to the working chamber,

the fluid pressure control unit controls the first valve and the second valve such that the pressure of the fluid supplied to the working chamber becomes an instruction pressure, based on a value detected by the pressure detection unit.

3. The yarn winding device according to claim 2,

the instruction pressure is sequentially input to the fluid pressure control section from the outside.

4. The yarn winding device according to any one of claims 1 to 3,

the brake device further includes a supply switching valve disposed between the first valve of the fluid pressure variable portion and the working chamber, and a supply control portion that controls opening and closing of the supply switching valve.

5. The yarn winding device according to claim 4,

the supply control unit alternately repeats opening and closing of the supply switching valve.

6. The yarn winding device according to claim 5,

the supply control unit changes at least one of an open time and a closed time of the supply switching valve.

7. The yarn winding device according to any one of claims 1 to 3,

further provided with:

a contact roller which rotates by contacting with the package to rotate the package,

A roller driving part for driving the contact roller to rotate,

A package rotation speed detecting section for detecting a rotation speed of the package,

A contact roller rotational speed detection unit for detecting the rotational speed of the contact roller, and

a winding control part for controlling the braking device and the roller driving part,

when decelerating the package while maintaining a state in which the package is in contact with the contact roller and the yarn is being wound into the package, the winding control unit controls the braking device and the roller driving unit so that a difference between a peripheral speed of the package and a peripheral speed of the contact roller falls within a predetermined range, based on a detection result of the package rotational speed detection unit and a detection result of the contact roller rotational speed detection unit.

8. The yarn winding device according to claim 4,

further provided with:

A roller driving part for driving the contact roller to rotate,

9. The yarn winding device according to claim 5,

further provided with:

A roller driving part for driving the contact roller to rotate,

10. The yarn winding device according to claim 6,

further provided with:

A roller driving part for driving the contact roller to rotate,

11. The yarn winding device according to claim 7,

the disclosed device is provided with:

a yarn accumulating section that is arranged between the yarn supplying section and the package, and accumulates the yarn supplied from the yarn supplying section; and

a yarn joining device which is disposed between the yarn supplying section and the yarn accumulating section and which connects the yarn end on the yarn supplying section side and the yarn end on the yarn accumulating section side when the yarn is not connected between the yarn supplying section and the yarn accumulating section,

the winding control unit controls the braking device and the roller driving unit to decelerate the package and the contact roller when the yarn is spliced by the yarn splicing device.

12. The yarn winding device according to claim 8,

the disclosed device is provided with:

13. The yarn winding device according to claim 9,

the disclosed device is provided with:

14. The yarn winding device according to claim 10,

the disclosed device is provided with:

15. The yarn winding device according to any one of claims 1 to 3,

the braking device changes the pressure of the fluid supplied to the working chamber so that the smaller the amount of yarn of the package, the smaller the braking force acting on the package.

16. The yarn winding device according to claim 4,

17. The yarn winding device according to claim 5,

18. The yarn winding device according to claim 6,

19. The yarn winding device according to claim 7,

20. The yarn winding device according to claim 8,

21. The yarn winding device according to claim 9,

22. The yarn winding device according to claim 10,

23. The yarn winding device according to claim 11,

24. The yarn winding device according to claim 12,

25. The yarn winding device according to claim 13,

26. The yarn winding device according to claim 14,

27. A yarn winding device for winding a yarn around a winding bobbin from a yarn supplying section for supplying the yarn to form a package,

the apparatus includes a brake device having a brake section for braking rotation of the package, a working chamber for operating the brake section by fluid pressure inside the brake section, a supply switching valve disposed between a fluid supply port connected to a fluid supply source and the working chamber, and a supply control section for controlling opening and closing of the supply switching valve,

the supply control unit alternately repeats opening and closing of the supply switching valve while changing at least one of an opening time and a closing time of the supply switching valve,

the yarn winding device further includes a unit control unit and a contact roller that rotates the package by contacting the package,

the unit control unit is configured to calculate a circumferential speed difference between the package and the contact roller as needed during deceleration of the package and read optimum data among the setting data for switching the timing of turning on/off the supply switching valve based on the circumferential speed difference at that time,

the setting data is sequentially input from the unit control section to the supply control section,

the unit control unit performs feedback based on the peripheral speed difference during deceleration of the package, and adjusts the pressure to an arbitrary level as needed.

28. The yarn winding device according to claim 27,

further provided with:

a roller driving part for driving the contact roller to rotate,

29. The yarn winding device according to claim 28,

the disclosed device is provided with:

30. The yarn winding device according to claim 27,

31. The yarn winding device according to claim 28,

32. The yarn winding device according to claim 29,