JPH05201618A - Thread passage roller - Google Patents

Abstract

PURPOSE:To improve the productivity and the quality of a fiber product by enabling a long term running without the necessity of a disassembly and maintenance. CONSTITUTION:A rotary support shaft 20 supporting a threading roller 2 and the bearings 6, 8, 10A, 10B of tree rollers respectively is made of a hollow pipe, through which a seal gas is supplied inside of the threading roller 2. The seal gas in the threading roller 2 penetrates respective bearings in an axial direction so as to flow outside, meantime, flows out through ring shaped clearances G1, G2 in a radial direction and outside direction. Thereby, a wool feather, another foreign material, moisture and the like piled up on this part are taken out and removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention guides a large number of yarns through a treatment line when continuously treating a large number of yarns in an atmosphere containing dust or water. It relates to a yarn path roller for. INDUSTRIAL APPLICABILITY The yarn path roller of the present invention is particularly suitable for use in a carbon fiber production line, for example, in a firing process, for guiding a large number of carbon fibers in parallel to a firing furnace in an inert atmosphere.

[0002]

2. Description of the Related Art For example, a large number of infusibilized or pre-carbonized carbon fibers (strands) are arranged in parallel and guided by yarn path rollers arranged at the inlet side and the outlet side of a firing furnace. It is fired by continuously passing through a firing furnace in an inert atmosphere. An example of a yarn path roller is shown in FIG.

Briefly described, a yarn path roller 1A used in a conventional heat treatment line is a yarn passing roller 2 and a free roller 4 (4 provided adjacent to a side portion of the yarn passing roller 2).
A, 4B).

The threading roller 2 has threading cylindrical bodies 2a each having a predetermined outer diameter through bearings 6 and 8 arranged on the inner peripheral portion of a flange portion 2b integrally fixed on both sides thereof. The rotary support shaft 20 is rotatably supported on the rotary support shaft 20. On the surface of the threaded cylindrical body 2a, a large number of guide grooves 2c for guiding a large number of carbon fibers in parallel are formed in parallel as necessary.

Further, the free roller 4 (4A, 4B) holds the carbon fiber tip used for threading these carbon fibers first through the firing furnace prior to the firing treatment of the carbon fibers. A bearing 10 for guiding the tow rope of the carrier bar, which is arranged on the inner periphery of the bearing.
The rotary support shaft 20 is rotatably supported via (10A, 10B). A guide groove 4a for guiding the pulling rope is formed on the circumferential surface of each free roller 4, and the diameter of the bottom of the groove 4a is substantially the same as the diameter of the bottom of the guide groove 2c of the threading roller 2. Are the same.

In the yarn guide roller 1A, each free roller 4 can rotate relative to the yarn passing roller 2, but the rotation support shaft 20 cannot move in the axial direction. Each bearing 6, 8, 10 (10A, 10B) has a suitable spacer 22, 24 and stop ring 26, 28, 32, 34.
The rotary support shaft 20 is positioned in a normal manner.

In the heat treatment of carbon fiber, after the carbon fiber has been passed through the firing furnace, the carrier bar is removed from the tow rope, and the carbon fiber is also removed from the carrier bar and wound on the winding drum. Taken. When the firing step is started, the carbon fibers are taken up while a predetermined tension is applied by a plurality of feed rollers and the like, and are wound on a winding drum.

Further, if the tow rope with the carrier bar removed is kept in a state of being stopped in the firing furnace during the firing process, the heated portion in the firing furnace is locally deteriorated, so that the firing rope is fired. The free roller 4 is supported and guided so as not to stagnate in the furnace, and the auto-reverse operation is performed at a slight speed, that is, the reciprocating motion is performed between the sending side drum and the winding side drum.

[0009]

The yarn guide roller 1A having such a structure operates extremely favorably at first, but if the operation is continued for a while, the fluff of carbon fiber, dust, and other foreign matter generated from the firing line. However, it is often found that the toner adheres to the end surface of the yarn path roller 1A or the side surfaces of the bearings 6, 8, 10 (10A, 10B) and induces roller rotation failure. Such poor rotation of the yarn path roller 1A further induces the generation of fluff on the carbon fiber, resulting in a marked deterioration of the quality of the carbon fiber product.

In order to solve this problem, the present inventors have tried to use a shield type bearing as the bearings 6, 8, 10 (10A, 10B). That is, the threading roller 2 is provided with a one-sided shield bearing whose outer surface is sealed,
Although both shield bearings are used for the free roller 4, even with this configuration, the yarn path roller 1A causes a rotation failure in about 1 to 2 months, and therefore the operation is stopped and disassembled for maintenance. And the removal of foreign substances was forced. like this,
The disassembly and maintenance of the yarn path roller 1A significantly reduces the carbon fiber productivity.

Further, the shield type bearings 6, 8, 10
Sealing materials such as oil seals and dust seals were installed adjacent to (10A, 10B). In this case, the problem of poor rotation due to fluff entering the bearing could be solved, but the resistance due to the sealing material itself is large, so the yarn path that rotates with a low rotational force. There was a problem that the roller stopped due to the resistance of the sealing material.

Therefore, an object of the present invention is to provide a yarn guide roller which can be operated for a long period of time without requiring disassembly and maintenance, and can improve the productivity and quality of textile products. is there.

[0013]

The above objects are achieved by a yarn path roller according to the present invention. In summary, the invention relates to a yarn path roller comprising a threading roller for guiding a large number of fibers and a free roller arranged adjacent to the sides of the threading roller so as to be relatively rotatable. The threading roller and the free roller are rotatably supported by a rotary support shaft, which is a hollow tube, via a shield bearing, and the inside of the threading roller is supplied with a shield gas through the hollow tube. The shield gas is allowed to flow from the inside of the threading roller to the outside through the bearings of the threading roller and the free roller in the axial direction, and at the same time, the end surface of the threading roller and the threading roller are The yarn guide roller is characterized in that an annular gap formed between the end surfaces of adjacent free rollers is caused to flow outward in the radial direction.
When a plurality of free rollers are arranged side by side, the seal gas flows radially outward through the annular gap formed between the two free rollers.

According to another aspect of the invention, the free roller can be dispensed with, and accordingly, according to the invention, in a yarn path roller with a threading cylinder for guiding a large number of fibers, said roller The threading cylinder is rotatably supported on a rotary support shaft, which is a hollow tube, through a shield bearing, and a shielding gas is supplied to the inside of the threading cylinder through the hollow tube. There is provided a yarn path roller characterized in that the shield gas is made to flow from the inside of the threading cylindrical body through the bearing in the axial direction to the outside.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A yarn path roller according to the present invention will be described below in more detail with reference to the drawings.

Referring to FIG. 1, one embodiment of a yarn path roller 1 constructed in accordance with the present invention is illustrated. In the present embodiment, the yarn guide roller 1 is used for a carbon fiber heat treatment line, and therefore, as in the conventional case, the yarn passing roller 2 is used.
And a pair of free rollers 4 (4A, 4B) arranged adjacent to the side of the threading roller 2 on the left and right sides. The number of free rollers 4 provided is not limited to this, and any number can be provided as desired.

The threading roller 2 has threading cylindrical bodies 2a each having a predetermined outer diameter through bearings 6 and 8 arranged on the inner peripheral portion of a flange portion 2b integrally fixed on both sides thereof. The rotary support shaft 20 is rotatably supported on the rotary support shaft 20. On the surface of the threading cylindrical body 2a, for example, 50 to 100 guide grooves 2c for guiding a large number of carbon fibers in parallel are formed in parallel and at equal intervals (pitch). Of course, the guide groove 2c may be formed as one continuous groove without being formed individually.

Further, each free roller 4 is similar to the conventional one.
The rotary support shaft 20 is rotatably supported by the bearing 10 (10A, 10B) arranged on the inner peripheral portion thereof. A guide groove 4a for guiding a tow rope made of, for example, a carbon fiber braid is formed on the circumferential surface of each free roller 4, and the diameter of the bottom of the groove 4a is the guide groove 2c of the threading roller 2. Is substantially the same as the diameter of the bottom part of the.

In this embodiment, the bearings 6, 8 and 10 (10) of the threading roller 2 and the free roller 4 (4A, 4B) are also used.
A, 10B) is not limited to this, but the thread roller 2 is provided with one-sided shield bearings 6 and 8 with the outer side sealed, and each free roller 4 is provided with both shield bearings 10 (10A). 10B) was used. More specifically, in this embodiment, the single-shield bearings 6 and 8 are JIS standard (JIS B 1513) roller bearing 6004Z.
As the double shield bearing 10 (10A, 10B),
JIS standard (JIS B 1513) roller bearing 60
04ZZ was used. In such a shield bearing, the seal plate is not in contact with the inner ring, the grease does not leak from the inside, and the bearing friction is extremely low.
It is suitable. On the other hand, in the present invention, for example, in a completely sealed hermetic bearing such as the JIS standard (JIS B 1513) roller bearing 6204DD, the seal plate is in contact with the inner ring, and the bearing friction is large from the beginning. , Not preferable.

With the yarn path roller 1, each free roller 4
Can rotate relative to the threading roller 2, but the rotation support shaft 20 cannot be moved in the axial direction, so that each bearing has appropriate spacers 22, 24 and a retaining ring 2.
The rotary support shaft 20 is mounted at a predetermined position by 6, 28, 32 and 34.

According to the present invention, the rotary support shaft 20 carrying the bearings of the threading roller 2 and each free roller 4 is a hollow tube. In this embodiment, one end of the hollow tube 20, that is, the right end in the drawing is closed, and the other end is connected with the connector 4.
The seal gas supply line 42 is connected via 0. The connector 40 may be a rotary joint. In this case, if the bearing fails for some reason and the yarn guide roller 1 does not rotate properly, the hollow tube 20 itself can be rotated by the rotary joint, and the yarn guide roller 1 continues to rotate. can do.

Further, according to the present invention, a plurality of ventilation holes 20 are provided in the portion of the hollow tube 20 located inside the threading roller 2.
a is provided, and the seal gas is supplied into the threading roller 2 through the ventilation hole 20a.

Next, the operation of the yarn path roller 1 having the above construction will be described.

For example, a seal gas such as air or nitrogen gas is passed through a check valve 44, a drain-extracting micro filter (0.3 μm filter) 46, a pressure reducing valve 48, a pressure gauge 50, etc. to clean a predetermined pressure. After being made into a gas flow, it is supplied from the supply manifold 52 to each of the supply pipe lines 42, and then flows into the hollow pipe 20 through the connection tool 40.

The seal gas in the hollow pipe 20 is ventilated through the vent hole 20.
It flows into the inside of the yarn passing roller 2 from a, and the inside of the yarn passing roller 2 is pressurized to a predetermined pressure. As will be better understood by referring also to FIG. 2 (which shows a part of the left-hand part in the drawing of the yarn path roller 1), the sealing gas in the threading roller 2 has the bearings 6, 10A as described above. Since it is not a completely sealed type, it passes through the gap between the seal plate and the inner ring, penetrates the bearings 6, 10A in the axial direction, and flows out to the outside of the threading roller 2.

The seal gas flowing from the inside of the threading roller 2 through the bearing 6 in the axial direction is formed between the outer end surface of the threading roller and the end surface of the free roller adjacent to this end surface. It flows outward in the radial direction through the annular gap G ₁ . At this time, due to the flow of the seal gas, fluff, other foreign matter, water and the like accumulated on the outer surface of the bearing 6 and the annular gap G ₁ are carried outward in the radial direction and removed. The flow velocity of the seal gas flowing through the annular gap G ₁ is 0.2 to 2 m / sec, usually about 0.5 m / sec.

The seal gas is normally continuously supplied to the threading roller 2
It is supplied to the inside, and therefore, the flow of the seal gas in the radial outward direction is constantly generated, and fluff or the like is prevented from entering the inside through the annular gap G ₁ to the bearing portion. To be prevented. Further, the seal gas can be intermittently supplied if necessary.

A part of the seal gas flowing out from the inside of the threading roller 2 through the bearing 6 axially penetrates the bearing 10A of the free roller 4A and flows out of the free roller 4A. This seal gas flow causes the bearing 10A
The fluff and other foreign matter accumulated on the outer side surface of the free roller 4A and the outer end surface of the free roller 4A are blown away and removed. Further, by continuously supplying the seal gas, an outward flow of the seal gas through the bearing 10A is constantly generated, and fluff or the like is generated on the outer surface of the bearing 10A and the outer end surface of the free roller 4A. Are prevented from accumulating on the surface.

Similarly, at the right side portion of the yarn path roller 1 in the drawing, the seal gas flowing into the inside of the yarn passing roller 2 passes through the bearing 8 of the yarn passing roller 2 and the bearing 10B of the free roller 4B, respectively. The free roller 4 penetrates in the axial direction.
While flowing out to the outside of B, the annular gap G ₂ formed between the outer end surface of the threading roller 2 and the end surface of the free roller 4B adjacent to this end surface also flows to the outside in the radial direction. .. Due to such a flow of the seal gas, fluff and other foreign matters accumulated on the side surfaces of the bearings 8 and 10B and the annular gap G ₂ are carried outward in the radial direction and removed.

Further, by continuously supplying the seal gas, the flow of the seal gas in the radial outward direction is always generated, and the fluff or the like flows inward through the annular gap G ₂ into the bearing portion. To the side surface of the bearing and the outer end surface of the free roller are also prevented from being accumulated.

In the present invention, a plurality of free rollers 4 may be arranged side by side if necessary, but in this case, the seal gas is formed in an annular shape formed between the two free rollers. It flows out through the gap to the outside in the radial direction,
The fluff and other foreign substances accumulated in the annular gap are carried outward in the radial direction and removed.

As a result of actually using the yarn path roller 1 having the above-described configuration shown in FIG. 1 in a carbon fiber firing line, the conventional FIG.
The yarn path roller 1A having the structure shown in FIG.
Of the 17 rollers, 17 rollers were in poor rotation and had to be stopped and disassembled for maintenance, whereas the yarn guide roller 1 of the present invention was 18 All of the rollers worked well without the need for overhaul.

In the above embodiment, the yarn path roller 1 of the present invention.
Has been described in connection with the firing treatment step of carbon fiber, but it can be used in other treatment steps, and further, it can be suitably used as a yarn guide roller in various treatment steps of other fibers. it can.

For example, the yarn path roller 1 of the present invention can be used for a line for cleaning carbon fibers and other various yarns, but in this case, the free yarn required in the above embodiment is not required. The rollers 4A, 4B are not always necessary. That is, in this embodiment, the yarn passing roller 1 is only the yarn passing roller 2, that is, the yarn passing cylindrical body 2a having a predetermined outer diameter is provided on both sides of the flange portion 2b integrally fixed. It is configured to be rotatably supported on a rotary support shaft 20 of a hollow tube via bearings 6 and 8 arranged on the inner peripheral portion.
Therefore, the shield gas supplied through the hollow tube 20 penetrates the bearings 6 and 8 in the axial direction from the inside of the threaded cylindrical body 2a and flows out to the outside.
Moisture and the like accumulated on the outer surface of 8 and the outer end surface of the flange portion 2b are blown away.

[0035]

EFFECTS OF THE INVENTION The yarn path roller according to the present invention configured as described above enables long-term operation without requiring disassembly and maintenance, and achieves improvement in productivity and quality of textile products. You can

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a yarn path roller according to the present invention.

FIG. 2 is a partially enlarged vertical sectional view of the yarn path roller according to the present invention shown in FIG.

FIG. 3 is a vertical cross-sectional view of a conventional yarn path roller.

[Explanation of symbols]

1 thread guide roller 2 threading roller 4 (4A, 4B) free roller 6, 8 single shield bearing 10 (10A, 10B) double shield bearing 20 rotary support shaft (hollow tube) 20a vent hole

Claims (2)

[Claims] 1. A threading roller for guiding a large number of fibers,
In a yarn path roller provided with a free roller arranged adjacent to a side portion of the threading roller so as to be relatively rotatable, the threading roller and the free roller are hollow tubes, and a shield bearing is provided on a rotation support shaft. Is rotatably supported via
A shield gas is supplied to the inside of the threading roller through the hollow tube, and the shield gas is passed through the threading roller and the free roller bearings from the inside of the threading roller in the axial direction. While letting it flow to the outside,
A yarn guide roller, characterized in that an annular gap formed between an end face of the yarn passing roller and an end face of a free roller adjacent to the yarn passing roller is caused to flow outward in a radial direction. 2. A yarn path roller provided with a threading cylindrical body for guiding a large number of fibers, wherein the threading cylindrical body is rotatably supported by a rotary support shaft which is a hollow tube via a shield bearing. Further, a shield gas is supplied to the inside of the threading cylinder through the hollow tube, and the shield gas is passed from the inside of the threading cylinder to the outside in the axial direction through the bearing. A yarn path roller that is characterized by causing it to flow out.