JP2000072330A - Yarn filament body guide roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guide roller that is little in rotational variations, possible for a stable high-speed rotation and excellent in maintainability. SOLUTION: This guide roller is composed of a shaft body 2 loosely fitted in a roller 1 provided with a yarn filament body guide groove 1a, two thrust members 3 and 4 installing each clearance 6 at both sides of this roller 1 and consisting of respective porous bodies set up each, two cover members 9 and 10 surrounding these thrust members 3 and 4, and a sealing member 7 set up in space between the thrust members 3, 4 and the cover members 9 and 10. In this constitution, the shaft body 2, these thrust members 3, 4 and cover members 9 and 10 are integrally locked by a locking screw 11, and then each clearance width of the roller 1 and the thrust members 3 and 4 is made adjustable so as to gradually expand or contract it toward an opening part of the clearance 6 from the shaft body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide roller of a gas bearing type for guiding a filament such as a thread or a drawn wire in a manufacturing process of a fiber or a drawn wire.

[0002]

2. Description of the Related Art For example, in a fiber manufacturing process, a yarn processing speed is 3000 m / min to 5000 m in a spinning process.
/ M and the stretching step are as fast as 300 m / min to 1000 m / min, and the processing speed has been further increased in recent years.

[0003] By the way, most of the guides for guiding the running of the yarn are fixed type guides. However, the fixed type guide has too much frictional resistance with the yarn, so that the damage to the yarn is small. This was a major factor in lowering yarn quality. Also, with the diversification of yarn varieties, the number of single yarns (the number of filaments constituting the yarn) tends to increase, and as a result, the thickness per single yarn becomes thinner. And the frictional resistance of the yarn had a greater effect on the yarn quality.

[0004] Therefore, in order to reduce the frictional resistance with the yarn and improve the yarn quality, a rotary type guide roller using a bearing is also used. When the yarn is guided at such a high speed, the rotation is suppressed by the seizure of the roller, and the friction coefficient between the roller and the yarn increases.As a result, the damage to the yarn gradually increases, and finally the roller is seized. There was a problem that it would not work.

Therefore, as a guide roller for remedying such a defect, a roller using a gas bearing instead of the rolling bearing has been proposed.

FIG. 6 shows the structure of a conventional guide roller of the gas bearing type. Reference numeral 21 denotes a roller having a thread-shaped guide groove 21a, 22 denotes a shaft loosely fitted to the roller 21, and 23 and 24. Are two thrust members provided with gaps 26 on both side surfaces of the roller 21, respectively.
The outside of each of the thrust members 23 and 24 is a cover member 2.
7, 28, respectively. Then, a fluid, for example, air is ejected from a fluid ejection port 22a formed on the outer peripheral surface of the shaft body 22 to form a hydrostatic fluid film with the roller 21, and the roller 21 is rotatably supported. A part of the fluid ejected from the fluid ejection port 22a is transferred to the gap 2 between the roller 21 and the thrust members 23 and 24.
6, and a thrust groove 23b, 24b formed in the inner surface of each thrust member 23, 24 on the roller side forms a hydrostatic fluid film, thereby restricting the movement of the roller 21 in the thrust direction. I was

[0007] Such a gas bearing type guide roller can be used even if the yarn is guided at a high speed as described above.
There is an advantage that high-quality yarn can be provided without seizure.

[0008]

However, the guide roller shown in FIG. 6 has high rigidity in the radial direction, but the thrust direction is such that the roller 21 and the thrust member 2 at the time of assembly are in the thrust direction.
If the management of the gap 26 between the rollers 2 and 3 is not appropriate,
The static pressure fluid film formed in the gap 26 between the first member 1 and the thrust members 23 and 24 becomes non-uniform, and when a thrust load is applied, the rotational characteristics of the roller 21 become unstable, and when it is severe, a severe vibration called a pneumatic hammer occurs. When the roller 21 comes in contact with one of the thrust members 23 and 24, the roller 21 comes into contact with the surface and the rotation speed of the roller 21 rapidly decreases, and the sliding resistance between the roller 21 and the yarn increases. The yarn quality was degraded, and the roller 21 sometimes did not rotate in severe cases.

Further, in manufacturing such a guide roller, each member such as the roller 21, the shaft body 22, and the thrust members 23 and 24 is processed with high precision, and the roller 21 and the thrust members 23 and 24 are formed with high precision. If the gap 26 is not sufficiently managed, stable rotation characteristics of the roller 21 cannot be obtained, so that it takes time and effort to manufacture the guide roller, and the manufacturing cost increases. In addition, such a guide roller requires regular maintenance, and must be disassembled and assembled each time. Therefore, it is difficult to operate the guide roller unless a skilled person.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above problems and to provide a guide roller which has a small rotation variation of the roller, is capable of stable high-speed rotation, and is excellent in maintenance.

[0011]

SUMMARY OF THE INVENTION In view of the above problems, the present invention is directed to a roller having a thread-shaped guide groove, a shaft loosely fitted to the roller, Thrust members provided with gaps on both side surfaces of the roller, and a cover member surrounding each of the thrust members,
A seal member disposed between the thrust member and the cover member, and a fixing screw for integrally fixing the shaft, each thrust member, and each cover member are provided on the outer peripheral surface of the shaft. A fluid is ejected from a fluid ejection port to form a hydrostatic fluid film in a gap between the roller and the shaft, and a fluid is ejected from a fluid ejection port provided on an inner surface of the thrust member to form a fluid between the roller and the thrust member. A guide roller that rotatably supports the roller by forming a hydrostatic fluid film in the gap, and that the thrust member is configured to be deformable, and that the roller and the roller are fixed according to the degree of tightening of the fixing screw. The gap width of the thrust member can be adjusted so as to gradually increase or decrease from the shaft body toward the gap opening.

According to a second aspect of the present invention, a recess is formed in the center of the outside of the thrust member so as to be deformable, and the gap width between the roller and the thrust member is controlled by the degree of tightening of the fixing screw. It is characterized in that it can be adjusted so as to be gradually reduced from the body toward the gap opening.

According to a third aspect of the present invention, a recess is formed in the center of the inside of the thrust member so as to be deformable, and the width of the gap between the roller and the thrust member is controlled by the degree of tightening of the fixing screw. It is characterized in that it can be adjusted so as to gradually expand from the body toward the gap opening.

The invention according to a fourth aspect is characterized in that the thrust member is formed of a porous body, and pores opened on the inner surface of the thrust member are fluid injection ports.

The invention according to claim 5 is characterized in that the shaft body is formed of a porous body, and pores opened on the outer peripheral surface of the shaft body are fluid injection ports.

[0016]

Embodiments of the present invention will be described below.

FIG. 1 is a view showing a guide roller for a thread according to the present invention, wherein FIG. 1 (a) is a perspective view, FIG. 1 (b) is a longitudinal sectional view, and FIG.
1 is an exploded perspective view showing the guide roller of FIG. 1, and 1 is a cylindrical roller provided with a thread guide groove 1 a on the outer peripheral surface.
Is a cylindrical shaft that is loosely fitted in the inner hole of the roller 1;
Reference numeral 4 denotes a disk-shaped thrust member made of a porous body disposed on each side surface of the roller 1 with a gap 6 provided therebetween. Reference numeral 9 denotes a first cover member surrounding one thrust member 3;
0 is a second cover member surrounding the other thrust member 4, 11 is the first cover member 9, the thrust member 3,
It is a fixing screw for integrally fixing the shaft 2, the thrust member 4, and the second cover member 10.

The first cover member 9, the thrust members 3, 4 and the shaft 2 are provided with fluid supply holes 2c, 3c, 4c, 9c for supplying a fluid in the axial direction, respectively.
The shaft body 2 is provided with a fluid introduction hole 2b communicating from the fluid supply hole 2c to the outer peripheral surface, and the outlet of the fluid introduction hole 2b serves as a fluid ejection port 2a. Then, a fluid is ejected from the fluid ejection port 2a, and a static pressure fluid film is formed in a gap 5 between the roller 1 and the roller 1 so that the roller 1 is rotatably supported. The shaft 2 is a roller 1
It is configured to be slightly longer than the width of.

In the center of the outside of the thrust members 3 and 4, circular recesses 3 larger than the cross-sectional area of the shaft body 2 are provided.
a and 4a are formed, and O-rings are interposed as seal members 7 between the first cover member 9 and the thrust member 3 and between the second cover member 10 and the thrust member 4, respectively. Fluid supply hole 9 of cover member 9
c prevents the fluid supplied from c from leaking between the first cover member 9 and the thrust member 3 and from between the second cover member 10 and the thrust member 4.
The fluid is ejected from pores (fluid ejection ports) opened on the inner surface of the roller 1 to form a static pressure fluid film in the gap 6 with the roller 1.

When the fixing screw 11 is temporarily fixed, the gap 6 between the roller 1 and the thrust members 3 and 4 is formed to have a substantially constant width as shown in FIG. When tightened, the center of the thrust members 3 and 4 is pushed by the shaft body 2 as shown in FIG. 1B, and as a result, the peripheral edges of the thrust members 3 and 4 are covered with the first cover member 9 and the second cover member 10. As a result, the gaps between the roller 1 and the thrust members 3, 4 are gradually reduced from the shaft body 2 toward the gap opening.

Thus, when the thread is guided by the guide roller of the present invention, the roller 1 rotates smoothly, and the thread can be guided at a high speed. Further, even if the roller 1 comes into contact with the thrust members 3 and 4 at any time, the roller 1 comes into contact with a point or a line instead of a surface as in the related art, so that a reduction in the rotation speed of the roller 1 and uneven rotation can be suppressed as much as possible. .

In the guide roller of the present invention, the degree of expansion of the gap width between the roller 1 and the thrust members 3 and 4 can be easily controlled by adjusting the tightening force of the fixing screw 11. The gap 6 between the roller 1 and the thrust members 3 and 4 can be easily managed so as to obtain a large thrust rigidity.

Further, the guide roller of the present invention does not require strict dimensional accuracy of the roller 1, the shaft body 2, and the thrust members 3 and 4, and also requires high-precision assembly management during manufacturing and maintenance. Since it is unnecessary, it can be easily manufactured and maintained even by non-experts.

The diameter of the recesses 3a, 4a formed in the thrust members 3, 4 is preferably formed to be larger than the cross-sectional area of the shaft 2, so that the gap 6 is controlled by the deformation of the thrust members 3, 4. This can be easily performed by the fixing screw 11. The recesses 3a of the thrust members 3, 4
The thickness of the 4a (the distance from the bottom surface of the concave portions 3a, 4a to the inner surface of the roller 1) is preferably 5 mm or less from the viewpoint of facilitating deformation. However, if the thickness is too thin, it is difficult to maintain the strength, and it is difficult to maintain a controlled degree of deformation. Therefore, the lower limit is preferably 1 mm or more.

The width of the gap 5 between the roller 1 and the shaft body 2 and the width of the gap 6 between the roller 1 and the thrust members 3 and 4, which influence the rotation characteristics (rotational variation and load resistance) of the roller 1, are 5 to 20 μm, respectively. It is desirable to manage it. The gap 6 between the roller 1 and the thrust members 3, 4 may be managed at the narrowest point.

Further, the thrust members 3 and 4 are formed of a porous material, and the pores opened on the inner surface on the roller 1 side are used as fluid injection ports, and a static pressure is applied to a gap 6 between the roller 1 and the thrust members 3 and 4. A fluid film is formed. For that reason,
Since the fluid can be ejected almost uniformly from the inner surfaces of the thrust members 3 and 4, the rigidity of the roller 1 in the thrust direction can be increased, thereby preventing the roller 1 from vibrating and preventing the occurrence of a pneumatic hammer. Can be.

As the porous body constituting such thrust members 3 and 4, those having an average particle diameter of 5 μm or less and an average pore diameter in the range of 0.4 to 2 μm are good, and are in these ranges. The use of the porous body can effectively prevent the occurrence of the nematic hammer as described above.

Among the members constituting the guide roller, the roller 1 may be such that the guide groove 1a slides on the thread, the inner surface slides on the shaft 2, and the side surfaces slide on the thrust members 3 and 4, respectively. Because it has high rigidity and excellent wear resistance, it is necessary to manufacture it with a material having a small specific gravity in order to rotate at high speed, for example, alumina, titania,
Ceramics containing silicon carbide, silicon nitride, zirconia, or the like as a main component can be used.

Further, since the shaft 2 and the thrust members 3 and 4 which slide on the roller 1 are members that greatly affect the rotational accuracy of the roller 1, they can be processed with high precision and have excellent wear resistance. It is preferable to use ceramics containing alumina, titania, silicon carbide, silicon nitride, zirconia, or the like as a main component.

Further, each of the cover members 9 and 10 only needs to have mechanical strength for forming a bearing, and is made of stainless steel,
A metal material such as aluminum or brass can sufficiently function.

Next, another embodiment of the present invention will be described.

FIG. 4 shows the shaft 2 of the guide rollers shown in FIG.
Is formed of a porous material. In this way, by forming the shaft body 2 also from a porous body, the pores opened on the outer peripheral surface of the shaft body 2 can be used as the fluid ejection ports, and the fluid can be uniformly ejected toward the roller 1. Therefore, a uniform static pressure fluid film can be formed, and the rotation of the roller 1 can be further smoothed.

FIG. 5 shows the guide rollers of FIG. 1 in which recesses 3a and 4a formed in the thrust members 3 and 4 are provided at the center of the inside. The thrust members 3 and 4 are tightened by fixing screws 11. Is deformed outward, and the width of the gap between the roller 1 and the thrust members 3 and 4 is adjusted
From the opening toward the gap opening.

Even with such a structure, even if the roller 1 slides on the thrust members 3 and 4 at some time, the roller 1 can contact not a surface but a point or a line.
A reduction in the rotation speed and uneven rotation of the roller 1 can be suppressed as much as possible, and the gap between the roller 1 and the thrust members 3 and 4 can be increased by adjusting the tightening amount of the fixing screw 11 so as to obtain a large thrust rigidity. Can be easily controlled.

In the case of the guide roller shown in FIG. 5, if the tightening force of the screw 11 is increased due to its structural problem, the distance between the roller 1 and the thrust members 3, 4 becomes too large from the inside to the outside. For the material of the shaft 2, it is preferable to use glass or a metal material having a lower rigidity (Young's modulus) than ceramics, or to use a porous material such as ceramics or sintered metal. The shaft body 2 is slightly contracted by the tightening force of the fixing screw 11, and it is possible to prevent the gap between the roller 1 and the thrust members 3, 4 from becoming too large.

In order to effectively deform the peripheral edges of the thrust members 3 and 4, it is necessary that the diameters of the recesses 3a and 4a formed in the thrust members 3 and 4 be smaller than the sectional area of the shaft body 2. Further, by reducing the hole diameters of the recesses 3a and 4a and increasing the tightening force of the screw 11, the degree of contraction of the shaft body 2 can be increased. As a result, the roller 1 and the thrust member 3, 4 can be easily managed.

The recesses 3a, 4 of the thrust members 3, 4
The thickness of a (the distance from the bottom surface of the recesses 3a, 4a to the inner surface on the roller side) is preferably in the range of 1 to 5 mm from the viewpoint of easy deformation and strength maintenance as in FIG.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A thread-shaped guide roller as shown in FIGS. 1 and 4 was trial-produced, attached to a draw false twister used in a fiber production process, and 5 kg / cm ² of compressed air was supplied to the guide roller. The processing speed of the yarn is 800 m / min, the polyester filament yarn is processed under the condition of 150 d / 48 f, and the rotation speed of the roller 1 at that time is 1000
It was checked whether it was 0 rpm or more.

The rollers 1, shafts 2, and thrust members 3 and 4 constituting each guide roller have a purity of 99.
It was formed of about 5% alumina ceramics, and the dimensions of each member were as follows.

The outer diameter of the roller 1 is 36 m, the inner diameter is 15 mm, the wall thickness is 20 mm, the outer diameter of the shaft 2 is 14.980 mm, and the length is 2
0.020 mm, outer diameter of thrust members 3 and 4 30 mm,
The wall thickness is 5 mm, the diameter of the recesses 3a and 4a of the thrust members 3 and 4 is 20 mm, and the wall thickness is 3 mm (however, in the structure of FIG. 4, the diameter of the recesses 3a and 4a of the thrust members 3 and 4 is 12.5 mm).
And In this case, when the gap 5 between the roller 1 and the shaft body 2 and the gap 6 between the roller 1 and the thrust members 3 and 4 were temporarily fixed, each had a gap width of 10 μm, and was adjusted by tightening the fixing screw 11.

As a result, each of the guide rollers 125
A number of times of about 00 rpm was obtained, and it was possible to rotate smoothly without uneven rotation or vibration.

[0042]

As described above, according to the present invention, a roller having a guide groove for a thread-like body, a shaft body loosely fitted to the roller, and a gap are provided on both side surfaces of the roller. The thrust member, the cover member surrounding each of the thrust members, the seal member disposed between the thrust member and the cover member, the shaft body, each thrust member, and each cover member are integrally formed. A fixing screw for fixing, a fluid is ejected from a fluid ejection port provided on an outer peripheral surface of the shaft to form a hydrostatic fluid film in a gap between the roller and the shaft, and an inner surface of the thrust member is formed. A guide roller configured to rotatably support the roller by ejecting a fluid from a fluid ejection port provided to form a hydrostatic fluid film in a gap between the roller and the thrust member, wherein the thrust member is deformed. And the gap width between the roller and the thrust member can be adjusted so as to gradually expand or contract from the shaft body toward the gap opening depending on the degree of tightening of the fixing screw. When the thread is guided by the guide roller, the roller rotates smoothly and can guide the thread at a high speed. Also, even if the roller comes into contact with the thrust member, it can be a point or a line contact instead of a surface contact as in the past, so that the rotation speed of the roller can be reduced and uneven rotation can be suppressed as much as possible. The sliding resistance between the thread and the roller is reduced as much as possible, and a high-quality thread can be stably provided.

In particular, the present invention is configured such that a concave portion is formed at the center of the outside of the thrust member or a concave portion is formed at the center of the inside of the thrust member so as to be deformable. By adjusting the amount of tightening, the width of the gap between the roller and the thrust member can be easily managed, and assembly and maintenance can be performed by a non-expert.

Further, according to the present invention, the thrust member is formed of a porous body, and the pores opened on the inner surface of the thrust member are used as the fluid injection ports. Pneumatic hammer can be prevented by preventing vibration.

Further, according to the present invention, a uniform static pressure fluid film is formed because the shaft body is formed of a porous body, and pores opened on the outer peripheral surface of the shaft body are used as fluid injection ports. Thus, vibration and rotation unevenness of the roller can be further reduced.

Thus, by using the guide roller of the filamentous material according to the present invention as a guide roller in the fiber manufacturing process, the frictional resistance due to the sliding between the yarn and the roller is greatly reduced, and the damage to the yarn is reduced. In addition, since the frictional resistance is small and stable, the fluctuation of the yarn tension during the running of the yarn is also reduced, so that a high quality yarn can be manufactured and the processing speed of the yarn can be further increased.

[Brief description of the drawings]

FIG. 1A is a perspective view showing an example of a thread-shaped guide roller according to the present invention, and FIG. 1B is a longitudinal sectional view thereof.

FIG. 2 is an exploded perspective view of the guide roller shown in FIG.

FIG. 3 is a longitudinal sectional view showing a state at the time of assembling the guide roller shown in FIG. 1;

FIG. 4 is a longitudinal sectional view showing another example of the thread-shaped guide roller according to the present invention.

FIG. 5 is a vertical cross-sectional view showing another example of the thread-shaped guide roller according to the present invention.

FIG. 6 is a longitudinal sectional view showing a conventional guide roller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Roller 2 ... Shaft 2a ... Fluid ejection port 2b ... Fluid introduction hole 2c ... Fluid supply hole 3, 4 ... Thrust member 3a, 4a ... Depression of thrust member 3c, 4c: fluid supply hole 5: gap between roller and shaft 6: gap between roller and thrust member 7: seal member 9: first cover member 10 ... Second cover member 11: fixing screw

Claims (5)

[Claims] A roller provided with a guide groove of a thread, a shaft loosely fitted to the roller, thrust members provided with gaps on both side surfaces of the roller, and each of the thrust members. A surrounding cover member, a seal member disposed between the thrust member and the cover member, the shaft body,
Each thrust member and a fixing screw for integrally fixing each cover member, and a fluid is ejected from a fluid ejection port provided on an outer peripheral surface of the shaft body, and a hydrostatic fluid is injected into a gap between the roller and the shaft body. The roller is rotatably supported by forming a film and ejecting a fluid from a fluid ejection port provided on the inner surface of the thrust member to form a hydrostatic fluid film in a gap between the roller and the thrust member. A guide roller, wherein the thrust member is configured to be deformable,
A thread-like body characterized in that the gap width between the roller and the thrust member can be adjusted so as to gradually increase or decrease from the shaft body toward the gap opening by the degree of tightening of the fixing screw. Guide rollers. 2. A thrust member is formed so as to be deformable by forming a concave portion at an outer center thereof, and the gap width between the roller and the thrust member is changed from the shaft body to the gap opening by the degree of tightening of the fixing screw. 2. The thread-shaped guide roller according to claim 1, wherein the guide roller is configured to be adjustable so as to gradually decrease in length. 3. A thrust member is formed so as to be deformable by forming a concave portion in the center of the inside thereof, and the gap width between the roller and the thrust member is changed from the shaft body to the gap opening by the degree of tightening of the fixing screw. 2. The thread-shaped guide roller according to claim 1, wherein the guide roller is configured to be adjustable so as to gradually increase in length. 4. The guide for a thread-like body according to claim 1, wherein said thrust member is formed of a porous body, and pores opened on the inner surface of said thrust member are used as fluid injection ports. roller. 5. The thread-like body according to claim 1, wherein said shaft body is formed of a porous body, and pores opened on the outer peripheral surface of said shaft body are used as fluid injection ports. Guide roller.