CN110318126B

CN110318126B - Centrifugal spinning frame

Info

Publication number: CN110318126B
Application number: CN201910238267.7A
Authority: CN
Inventors: 佐藤江平; 富永直路; 宫田康广; 中村祐介; 槌田大辅
Original assignee: Toyota Industries Corp
Current assignee: Toyota Industries Corp
Priority date: 2018-03-28
Filing date: 2019-03-27
Publication date: 2021-12-03
Anticipated expiration: 2039-03-27
Also published as: EP3546626A1; JP7035705B2; CN110318126A; JP2019173215A; EP3546626B1

Abstract

The invention provides a centrifugal spinning frame. A centrifugal spinning machine is provided with: a tank (1) which has a downward opening (1a) and rotates; a yarn guide tube (5) which is inserted into the tank (1) through a mounting hole (1c) formed in the upper part of the tank (1) and guides the yarn (4) into the tank (1); and a yarn guide rail (6) which holds the yarn guide tube (5) and is movable in the lifting direction (D), wherein the yarn guide tube (5) is held by the yarn guide rail (6) via a yarn guide holder (7), and the holding force (P1) of the yarn guide tube holder (7) is smaller than the resistance (P2) applied to the yarn guide tube (5) by the contact of a winding portion (Y) formed by winding the yarn (4) around the yarn guide tube (5) and a non-lifting member. Thus, even when the yarn (4) is wound up on the yarn guide tube, the force generated when the yarn (4) wound on the yarn guide tube (5) contacts with another member can be alleviated.

Description

Centrifugal spinning frame

Technical Field

The present invention relates to a centrifugal spinning machine.

Background

As 1 type of spinning machine, a centrifugal spinning machine using a cylindrical tank is known. In a centrifugal spinning machine, a yarn drawn to a predetermined thickness is guided into a tank through a yarn guide tube while rotating the tank at a predetermined rotation speed, and the yarn is wound around the inner wall of the tank to form a cake. When the formation of the yarn cake is completed, the yarn is cut on the upstream side of the yarn guide tube, and then the bobbin is inserted into the can to rewind the yarn from the inner wall of the can to the bobbin.

In a conventional centrifugal spinning machine, as shown in fig. 7 (a), when a yarn 104 is wound around the inner wall of a tank 101 to form a cake C, the yarn 104 is wound around a yarn guide tube 105 as shown in fig. 7 (b). This phenomenon is referred to as "bobbin winding. When the yarn 104 is wound around the yarn guide tube 105, a wound portion Y of the yarn is formed outside the yarn guide tube 105. Therefore, when the yarn guide tube 105 is moved to avoid contact between the yarn guide tube 105 and the bobbin when the bobbin is inserted into the can after the formation of the yarn cake, as shown in fig. 7 (c), there is a possibility that: the winding portion Y of the yarn being wound around the yarn guide tube 105 is in contact with the rotating can 101. When the wound portion Y of the yarn comes into contact with the can 101, there is a possibility that the yarn guide tube 105 may be damaged by bending or the like.

In view of this, in the spinning machine described in patent document 1, air is blown from the tip end of the yarn guide tube, and the air flow near the tip end of the yarn guide tube is controlled, thereby preventing the yarn from being wound around the yarn guide tube.

Patent document 1: japanese examined patent publication No. 26-003129

However, even when the air flow near the tip end of the yarn guide tube is controlled as in the spinning machine of patent document 1, the yarn guide tube cannot be completely prevented from being wound up.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a centrifugal spinning machine capable of preventing damage to components even when a yarn guide tube of a yarn is wound up.

In order to solve the above problem, a centrifugal spinning machine according to the present invention includes: a can having a downward opening and rotating; a yarn guide tube inserted through the inside of the tank through a mounting hole formed in the upper portion of the tank, and guiding the yarn into the inside of the tank; and a guide rail for holding the yarn guide tube and movable in the lifting direction, wherein the yarn guide tube is held by the guide rail via a yarn guide tube holder, and the holding force of the yarn guide tube holder is smaller than the resistance applied to the yarn guide tube due to the contact of the wound portion formed by winding the yarn around the yarn guide tube and the non-lifting member.

Thus, even when the yarn guide tube is wound up, the force generated when the yarn wound around the yarn guide tube contacts another member can be relaxed, and the member can be prevented from being damaged.

Further, the yarn guide rail of the centrifugal spinning machine according to the present invention may hold the yarn guide tube by a frictional force generated between the yarn guide tube and the yarn guide tube holder.

Further, the yarn guide of the centrifugal spinning machine according to the present invention may have a concave portion, the yarn guide holder may have a convex portion engageable with the concave portion of the yarn guide, and the yarn guide rail may hold the yarn guide by engaging the concave portion of the yarn guide with the convex portion of the yarn guide holder.

Further, a yarn guide sensor may be provided to detect that the yarn guide is held by the yarn guide rail.

Further, a non-rotating portion that does not rotate relative to the yarn guide tube may be provided between the rotating tank and the yarn guide tube, and when the yarn guide tube is moved upward by the yarn guide rail in a state where the yarn is wound on the yarn guide tube due to the yarn being wound on the yarn guide tube, the yarn wound on the yarn guide tube may contact the non-rotating portion.

Further, the non-rotating portion may be a cylindrical bobbin guide provided between the tank and the bobbin, the bobbin may be accommodated in the bobbin guide so as to be movable in the vertical direction, a flange may be formed at an end of the bobbin guide, and in a state where the yarn is wound around the bobbin by winding up the bobbin, if the bobbin is moved upward by the bobbin guide rail, the yarn wound around the bobbin may contact the flange of the bobbin guide.

According to the centrifugal spinning machine of the present invention, even when the yarn guide tube is wound up, the damage of the component can be prevented.

Drawings

Fig. 1 is a schematic view showing an overall structure of a main shaft portion of a centrifugal spinning machine according to an embodiment of the present invention.

Fig. 2 is an enlarged cross-sectional view showing a vicinity of a lower end portion of a yarn guide of the centrifugal spinning machine shown in fig. 1.

Fig. 3 is an enlarged cross-sectional view of a contact portion between the yarn guide holder and the yarn guide of the centrifugal spinning machine shown in fig. 1.

Fig. 4 is a flowchart showing a flow of an operation of the centrifugal spinning machine shown in fig. 1.

Fig. 5 (a) to (c) are diagrams showing a process in which the yarn guide tube moves relative to the yarn guide rail and is separated from the yarn guide rail.

Fig. 6 is an enlarged cross-sectional view of an engagement portion between a yarn guide and a yarn guide holder of a centrifugal spinning machine according to another embodiment of the present invention.

Fig. 7 is a diagram showing a process of winding a yarn around a yarn guide tube of a conventional centrifugal spinning machine. Fig. 7 (a) is a diagram showing a state in which a yarn cake is formed on the inner wall of the can, fig. 7 (b) is a diagram showing a state in which a yarn guide tube on which a yarn is wound after the yarn cake is formed, and fig. 7 (c) is a diagram showing a state in which the yarn guide tube in a state in which the yarn is wound is moved upward.

[ description of reference ]

1 pot (non-lifting component), 1a opening, 1c mounting hole, 2a bearing (non-lifting component), 4 yarns, 5 yarn guide tubes, 6 yarn guide tube rails, 7 yarn guide tube holders, 8 yarn guide tube guides (non-rotating part, non-lifting component), 8b flange, 10 yarn guide tube sensors, main shaft part of 100 centrifugal spinning frame, D lifting direction, P1 holding force, P2 resistance, Y winding part.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

A schematic view of a spindle part 100 of a centrifugal spinning machine is shown in fig. 1. The spindle unit 100 of the centrifugal spinning machine is used by being arranged in a plurality on a machine base, not shown.

As shown in fig. 1, a spindle portion 100 of a centrifugal spinning machine has a tank 1 of a substantially cylindrical shape. The can 1 has a downwardly facing opening 1 a. Below the tank 1a bobbin 12 is arranged. The bobbin 12 can be lifted and lowered in the lifting and lowering direction D, that is, in the vertical direction, and when the bobbin 12 is lifted to the uppermost position, the bobbin 12 is accommodated in the tank 1.

A tank support 2 is mounted on the tank 1. A bearing 2a is provided inside the tank support portion 2. Further, a guide tube 8 is provided in a hollow portion inside the bearing 2 a. The yarn guide 8 is provided so as not to contact the bearing 2 a. The yarn guide 8 is formed into a substantially cylindrical shape, and

flanges

8a and 8b are formed at the upper end and the lower end of the yarn guide 8, respectively. As shown in fig. 2, the flange 8b at the lower end of the yarn guide 8 is disposed below the lower end of the bearing 2a of the tank support portion 2 and the upper surface 1b of the internal space of the tank 1. Further, the can 1 can rotate relative to the yarn guide 8 via the bearing 2 a. Further, the yarn guide tube 5 for guiding the yarn 4 into the tank 1 is housed in the yarn guide tube guide 8 so as to be movable in the lifting direction D. Further, since the bearing 2a and the yarn guide 8 are inserted into the can 1 through the mounting hole 1c formed in the upper portion of the can 1, the bearing 2a and the yarn guide 8 are provided between the yarn guide tube 5 and the can 1. As shown in fig. 1, the lower end of the yarn guide tube 5 protrudes into the can 1. A yarn discharge port 5b for discharging the yarn 4 is formed at the lower end of the yarn guide tube 5. The yarn guide tube 5 projects and extends from the upper end of the tank support portion 2.

Further, a guide seat rail 15 is provided on the tank support portion 2. The guide base 9 is attached to the guide base rail 15. The bobbin guide 8 is supported by the guide base 9 by the engagement of the flange 8a at the upper end of the bobbin guide 8 with the guide base 9.

The upper end portion of the yarn guide bobbin 5 is held by the yarn guide rail 6. A yarn guide holding hole 6a through which the yarn guide bobbin 5 is inserted is formed in the yarn guide rail 6. As shown in fig. 3, a gap is formed between the yarn guide tube 5 and the yarn guide tube holding hole 6 a. An annular yarn guide holder 7 is attached to the lower surface of the yarn guide rail 6 along the yarn guide holding hole 6 a. The yarn guide holder 7 is formed of resin. The yarn guide holder 7 holds the yarn guide tube 5 by a holding force P1. The holding force P1 is a frictional force generated between the yarn guide tube 5 and the yarn guide tube holder 7. That is, the yarn guide rail 6 holds the yarn guide 5 by the holding force P1 via the yarn guide holder 7. Further, by applying a force greater than the holding force P1 to the yarn guide tube 5, the yarn guide tube 5 can be moved relative to the yarn guide rail 6 in the lifting direction D. As shown in fig. 1, the yarn guide rail 6 is movable in the lifting direction D while holding the yarn guide 5. The upper limit of the height of the upper end 5a of the yarn guide tube 5 when the yarn guide tube 5 is lifted with the lifting of the yarn guide rail 6 is set to the upper limit height H.

A draft device 3 is provided above the guide rail 6, and the draft device 3 stretches the yarn to a predetermined thickness. Further, a yarn guide sensor 10 is provided between the draft device 3 and the yarn guide rail 6. The bobbin sensor 10 is a reflective optical sensor. The bobbin guide sensor 10 is provided such that the optical axis 10a is located at a position lower than the upper limit height H of the upper end 5a of the bobbin guide 5.

Further, a rack provided in a row with the spindle parts 100 of the plurality of centrifugal spinning machines is provided with a cart-type bobbin removing device 11, and the bobbin removing device 11 can move in a direction in which the spindle parts 100 of the centrifugal spinning machines are arranged side by side. The bobbin removing device 11 can grip and remove the bobbins 12 of the spindle part 100 of each centrifugal spinning machine by the robot arm 11 a.

The bobbin removing device 11 constitutes a bobbin retracting mechanism.

Next, the operation of the spindle unit 100 of the centrifugal spinning machine will be described with reference to fig. 4.

First, as shown in step S1 of fig. 4, a yarn cake is formed on the inner wall of the can 1. Specifically, as shown in fig. 1, in a state where the tank 1 is rotating at a high speed, the yarn 4 is guided into the tank 1 by the yarn guide tube 5, and the yarn 4 is discharged from the yarn discharge port 5b at the lower end of the yarn guide tube 5. The yarn 4 is subjected to a centrifugal force generated by the rotation of the tank 1, and the yarn 4 is pushed to the inner wall of the tank 1 to form a cake. At this time, the yarn guide 6 reciprocates in the lifting direction D, and thereby the position of the yarn discharge port 5b at the lower end of the yarn guide 5 is also moved to discharge the yarn 4, thereby forming a yarn cake.

Although the can 1 is rotating at a high speed, the guide tube guide 8 is stationary. Here, the bobbin guide 8 constitutes a non-rotating portion.

Next, as shown in step S2 of fig. 4, after the yarn cake is formed, the yarn guide rail 6 is raised. Then, as shown in step S3, it is determined whether or not the yarn guide tube 5 is detected by the yarn guide tube sensor 10. When the yarn guide sensor 10 detects that the yarn guide 5 is ascending together with the yarn guide rail 6, the yarn guide 5 is held by the yarn guide rail 6, and therefore it is determined that the yarn guide winding of the yarn 4 has not occurred. Then, the operation of the spindle part 100 of the centrifugal fine spinning machine is shifted to a step of rewinding the yarn 4 around the bobbin 12 as usual (step S4).

On the other hand, in step S3, when the yarn guide tube 5 is not detected by the yarn guide tube sensor 10, it is determined that the yarn guide tube winding of the yarn 4 has occurred. Specifically, as shown in fig. 5 (a), the yarn 4 is wound around the guide tube 5, and a yarn winding portion Y is formed on the outer periphery of the guide tube 5. Then, as shown in fig. 5 (b), when the yarn guide rail 6 and the yarn guide tube 5 are raised, the yarn winding portion Y comes into contact with the flange 8b at the lower end of the yarn guide tube 8, and a downward resistance P2 is generated to the yarn guide tube 5. When the resistance P2 becomes larger than the holding force P1 of the yarn guide rail 6 on the yarn guide tube 5, the upper end of the yarn guide tube 5 moves downward relative to the yarn guide tube holding hole 6a of the yarn guide rail 6 and separates as shown in fig. 5 (c). Therefore, when the yarn 4 is wound around the yarn guide tube 5, the yarn guide tube sensor 10 provided above the yarn guide tube guide rail 6 cannot detect the presence of the yarn guide tube 5. That is, the bobbin guide sensor 10 detects that the bobbin 5 is not held by the bobbin guide rail 6.

When the yarn guide tube of the yarn 4 is wound up in this manner, the bobbin removing device 11 grips the bobbin 12 with the robot arm 11a and removes it as in step S5 shown in fig. 4.

In the centrifugal spinning machine according to the present embodiment, the holding force P1 with which the yarn guide tube holder 7 provided on the yarn guide rail 6 holds the yarn guide tube 5 is smaller than the resistance P2 applied to the yarn guide tube 5 due to the contact between the winding portion Y formed on the yarn guide tube 5 and the non-elevating member. Therefore, since the guide tube 5 can be moved relative to the guide tube guide 6 in the lifting direction D by applying the resistance P2 to the guide tube 5, a force generated by contact between the winding portion Y formed in the guide tube 5 and another member is alleviated. Therefore, even when the yarn guide tube 5 is wound up with the yarn 4, the damage of the components of the main shaft part 100 of the centrifugal spinning machine can be prevented.

In this embodiment, the non-elevating members are the tank 1, the bearing 2a, and the guide 8.

The yarn guide 5 is held by the yarn guide rail 6 by a frictional force generated between itself and the yarn guide holder 7. Accordingly, even when the yarn guide tube 5 is held with a simple structure and the resistance P2 equal to or greater than the predetermined value is applied to the yarn guide tube 5, the yarn guide tube 5 can be easily moved relative to the yarn guide rail 6 in the vertical direction.

Further, the bobbin guide sensor 10 detects whether or not the bobbin 5 is held by the bobbin guide rail 6. Accordingly, if the yarn guide tube 5 is detected to move downward relative to the yarn guide tube guide rail 6 and to be separated from the yarn guide tube guide rail 6, it can be determined that the yarn 4 is wound on the yarn guide tube 5.

When the yarn 4 is wound up on the yarn guide tube 5, the yarn winding portion Y of the yarn guide tube 5 contacts the flange 8b at the lower end of the yarn guide tube guide 8, which is a non-rotating portion. Therefore, the force generated by the contact can be reduced as compared with the case where the winding portion Y of the yarn contacts the rotating member such as the can 1.

When it is determined that the yarn 4 is wound up on the yarn guide tube 5, the yarn guide tube 5 can be moved relative to the yarn guide rail 6 in the lifting direction D, and therefore the yarn guide tube 5 may contact the bobbin 12. Therefore, the bobbin removing device 11 removes the bobbin 12 to prevent contact between the yarn guide tube 5 and the bobbin 12.

Further, the bobbin guide sensor 10 may detect that the bobbin 5 moves downward relative to the bobbin guide rail 6 and separates from the bobbin guide rail 6, and then display a warning to manually remove the bobbin 12. Further, the bobbin 12 is laid down in the lateral direction and retracted without removing the bobbin 12, whereby the contact between the yarn guide tube 5 and the bobbin 12 can also be prevented.

In the present embodiment, the yarn guide tube 5 is held by the yarn guide rail 6 by the frictional force generated between itself and the yarn guide tube holder 7, but the method of holding the yarn guide tube 5 is not limited to this.

For example, as shown in fig. 6, a concave portion 13 may be formed on the outer periphery of the yarn guide tube 5, and the yarn guide tube 5 may be held with respect to the yarn guide rail 6 by engagement between the concave portion 13 and the convex portion 14 of the yarn guide tube holder 7. Further, by forming a convex portion on the outer periphery of the yarn guide bobbin 5 and forming a concave portion on the yarn guide bobbin holder 7, the yarn guide bobbin 5 may be held with respect to the yarn guide rail 6 by engagement between the convex portion of the yarn guide bobbin 5 and the concave portion of the yarn guide bobbin holder 7.

The holding force P1 for holding the yarn guide 5 on the yarn guide rail 6 may be a magnetic force of a magnet or an elastic force of a spring member.

When the yarn guide holder is a spring member, the yarn guide sensor detects the operation of the yarn guide holder, and determines whether or not the yarn guide 5 is detached from the yarn guide rail 6 and moves downward.

The yarn guide sensor 10 is not limited to a reflection-type optical sensor, and may be a transmission-type optical sensor or a contact-type sensor.

The bobbin guide sensor 10 may be directly attached to the bobbin guide rail 6 in the vicinity of the bobbin holding hole 6 a.

Further, the flange 8b may not be provided at the lower end of the guide bobbin guide 8, and the yarn winding portion Y of the guide bobbin 5 may be in direct contact with the lower end of the guide bobbin guide 8 having no flange.

In addition, when the bearing 2a has an inner ring in a stationary state and an outer ring that rotates relative to the inner ring, a non-rotating portion with which the yarn winding portion Y of the yarn guide tube 5 contacts may be an inner ring of the bearing 2 a.

Even when the yarn guide 8 rotates together with the can 1, the yarn guide tube 5 moves downward relative to the yarn guide rail 6, and a force generated by contact between the yarn winding portion Y of the yarn guide tube 5 and the yarn guide tube 8 is sufficiently reduced.

In fig. 5 (c), the yarn guide tube 5 is separated from the yarn guide rail 6, but the present invention is not limited to this, and even if the yarn guide tube 5 does not separate from the yarn guide rail 6, and the yarn guide tube 5 moves downward relative to the yarn guide rail 6, a force generated by contact between the yarn winding portion Y and the yarn guide 8 is alleviated.

Claims

1. A centrifugal spinning frame is characterized in that,

the disclosed device is provided with:

a can having a downwardly facing opening and rotating,

a yarn guide tube inserted through an attachment hole formed in an upper portion of the tank into the tank to guide the yarn into the tank; and

a guide rail for holding the yarn guide tube and capable of moving in the lifting direction,

the yarn guide is held by the yarn guide rail so as to be movable in a downward direction relative to the yarn guide rail via a yarn guide holder when a downward resistance is generated to the yarn guide,

the holding force of the yarn guide tube holder is smaller than the resistance force applied to the yarn guide tube due to the contact of the winding portion formed by winding the yarn on the yarn guide tube with the non-elevating member.

2. A centrifugal spinning frame according to claim 1,

the yarn guide rail holds the yarn guide tube by a frictional force generated between the yarn guide tube and the yarn guide tube holder.

3. A centrifugal spinning frame according to claim 1,

the yarn guide tube is provided with a concave part,

the yarn guide holder has a convex portion engageable with the concave portion of the yarn guide,

the yarn guide rail holds the yarn guide by engaging the concave portion of the yarn guide with the convex portion of the yarn guide holder.

4. A centrifugal spinning machine according to any one of claims 1 to 3,

the yarn guide device is provided with a yarn guide tube sensor for detecting that the yarn guide tube is held by the yarn guide tube guide rail.

5. A centrifugal spinning machine according to any one of claims 1 to 3,

a non-rotating portion that does not rotate relative to the yarn guide tube is provided between the rotating can and the yarn guide tube,

when the yarn guide rail moves the yarn guide tube upward in a state where the yarn is wound around the yarn guide tube due to the winding of the yarn guide tube, the yarn wound around the yarn guide tube comes into contact with the non-rotating portion.

6. A centrifugal spinning frame according to claim 5,

the non-rotating portion is a cylindrical yarn guide provided between the tank and the yarn guide,

the yarn guide tube is accommodated in the interior of the yarn guide tube so as to be movable in the lifting direction,

a flange is formed at the end part of the yarn guide tube guide,

when the yarn guide rail moves the yarn guide tube upward in a state where a winding portion is formed by winding the yarn around the yarn guide tube, the winding portion comes into contact with the flange of the yarn guide tube.