JPS6257725B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a top roller with an improved stop spring.

A conventional top roller using a needle is constructed as shown in FIG. In FIG. 1, 1 is an arbor, 2 is a rotation cell, and 3 is a support ring. This support ring 3 is made of an elastic material, such as nylon (registered trademark), and is attached to the outside of the rotation part support part 1' of the arbor 1. , so as to contact each other between the arbor stepped portion and the first thrust ring 4;
It is provided. The support ring 3 has flange portions 3', 3'' at both ends, and both flange portions 3', 3'' fit into grooves 2' and recesses 2'' provided in the inner peripheral wall of the rotating cell, respectively. The bearing ring 3 further has an inner flange part 3 on the inner side of the end in contact with the stepped part of the arbor, and its inner peripheral surface (the axial length is generally about 1.4 mm) supports the rotating part of the arbor. The portion of the bearing ring that is in contact with the outer peripheral surface of the rotating part 1', excluding the inner flange part 3, has a gap g between its inner peripheral surface and the outer peripheral surface of the rotating part support part 1' of the arbor. This is because when attaching and detaching the arbor 1 and the rotation cell 2, the end with the flange portion 3' is bent inward to separate the flange portion 3' and the corresponding groove 2'. mating,
This is to make it easier to leave. The axial length of gap g is typically about 4.6 mm. A retainer 6 is placed between the first thrust ring 4 and the second thrust ring 7.
The second thrust ring 7 is in contact with a collar ring 8 (made of chrome molybdenum steel (SCM-415)) that receives the thrust load of the needle 5, and the second thrust ring 7 is made of chrome molybdenum steel (SCM-415). -70CM) is fixed to the rotating part support part 1' of the arbor. In addition, 10 is the arbor ring to prevent wind lint.
11 is a rubber tip, 1 is integrally formed with
2 is an oil supply groove, and 13 is a cap.

The conventional top roller configured as above is
In order to make the rotation cell 2 detachable, a gap g is provided between the inner peripheral surface of the flange portion 3' of the support ring 3 and the rotation part support portion 1' of the arbor 1, and the axial length of the support ring 3 is It was necessary to increase the length of the support ring 3 to provide elasticity in the direction of deflection.

On the other hand, the distance A between the centers of the two rotating cells 2 and 2a at both ends of the arbor 1 is determined to be equal to the spindle gauge of the spinning machine (generally 75 mm), so if the support ring 3 is lengthened, the needle 5 and the axial center of the rotating cells 2, 2a do not match, and the rotation of the rotating cells 2, 2a becomes unstable due to the bias of the load on the needle 5, and uneven wear occurs on the needles and retainers. It was hot. In addition, when the support ring 3 is lengthened, the length of the rotating part support part of the arbor becomes longer.
On the other hand, since the length of the rotating cell remains the same, the space inside the rotating cell becomes narrower, and therefore the amount of grease, etc. can be reduced. Furthermore, even if grease or the like is applied around the needle 5, the axial length of the contact area between the inner circumferential surface of the inner flange 3 of the support ring 3 and the outer circumferential surface of the rotating part support portion 1' of the arbor 1 is short and Since this cannot be made long, grease, etc. will seep through the contact area, resulting in insufficient lubrication. Therefore, a special lubrication groove for needle lubrication is provided in the part of the rotating part support part 1' of the arbor 1 that faces the needle. However, it also had the drawbacks of a complicated structure and high production costs.

In order to eliminate the drawbacks of the conventional example, the present invention has a flange portion that contacts the stepped portion of the arbor and fits into the inner circumferential wall groove of the rotation cell, and the rotating portion of the arbor is provided on the entire inner circumferential surface of the annular portion. By providing a stop ring that is in contact with the outer peripheral surface of the support, even though the axial length of the stop ring is short, oil leakage is prevented, oil is retained well, and the axial length of the stop ring is extended. In other words, to provide a top roller which can avoid elongation of the rotary part support part, eliminate the need to provide an oil supply groove in the rotary part support part, and prevent the infiltration of fluff.

Next, an embodiment of the present invention will be described with reference to FIG.

In this embodiment, a stop ring 14 is provided between the stepped part 1'' of the arbor 1 and the first thrust ring 4, and the stop ring 14 is connected to the annular part 1''.
4'' and a flange portion 14' provided at one end of the flange portion 14', which is made of elastic and wear-resistant synthetic resin such as nylon. Groove 2' provided in
The entire inner circumferential surface of the annular part 14'' is in contact with the outer circumferential surface of the rotary part support part 1' of the arbor 1.Flanges are provided at both ends of the annular part 14''. Correspondingly, grooves or recesses may be provided on the inner wall surface of the rotation cell.

The length of the stop ring 14 in the axial direction is approximately 3 mm, but since the entire inner circumferential surface of the annular portion 14'' is in contact with the outer circumferential surface of the rotating part support portion 1', the length of the contact portion is 1.4 mm compared to the conventional one. mm, and the amount of grease seeping out is much smaller (the increase in length of the contact part by 1.6 mm makes it significantly more effective).Therefore, a lubrication groove is provided in the rotating part support 1'. Further, since the rotating part support part of the arbor 1 does not have to be long, it is easy to design the needle 5 so that the longitudinal center thereof coincides with the axial length center of the rotating cell 2. Become.

In the present invention, since the gap g is not provided as in the conventional example shown in FIG. When the surface 2 is formed and the rotation support part 1' of the arbor is pushed into the rotation cell 2, the flange part 14' of the stop ring 14 is inserted while contracting due to its elasticity.
When it reaches the position of groove 2', it is fitted into the groove.

Next, FIG. 3 shows another embodiment of the present invention, in which the same reference numerals as in FIG. , 16 are mounted between the collar ring 8 and the stop ring 14 via a spacer 19.

This embodiment is exactly the same as the previous embodiment, and the grease inserted from the oil supply hole 13' of the cap 13 is supplied to the ball 17 through between the balls 18, and there is no possibility of oil leaking to the outside of the stop ring 14. do not have.

In each of the above embodiments, the cap 13 is provided with the oil supply hole 13';
The oil supply hole is eliminated to make it a sealed type, and the rotation cell 2 is installed in advance.
If a sufficient amount of grease is sealed in the internal bearing part, the intrusion of fluff can be completely prevented, and an oil-free top roller can be provided. Furthermore, if a groove is provided in the rotating part support part 1' of the arbor 1 and the balls 17 and 18 are inserted,
Spacer 19 is not required.

As described above, the present invention has the following excellent effects.

(1) The entire inner circumferential surface of the annular portion 14'' of the stop ring 14 is in contact with the outer circumferential surface of the rotating part support portion 1' of the arbor 1, and the outer circumferential edge of the flange portion 14' is in contact with the groove on the inner wall surface of the rotating cell. 2', so even if the length of the stop ring in the axial direction is short, oil leakage to the outside of the stop ring can be prevented.
It is not necessary to increase the length of the .

(2) Since the length of the rotating part support part 1' of the arbor 1 does not have to be particularly long, the center of the axial length of the rotating part support part should be aligned with the center of the axial length of the rotating cell. Therefore, uneven wear of both can be prevented.

(3) Since the length of the rotating part support part 1' of the arbor 1 does not need to be particularly long, it is possible to increase the space between the rotating part 2 and the rotating part support part 1', increasing the amount of oil supplied. On the other hand, in conjunction with the prevention of oil leakage mentioned in item (1) above, grease etc. can be sufficiently retained in the rotating cell 2 for a long time, and a lubrication groove etc. can be provided in the rotating part support part 1'. There is no need to provide one.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of a conventional top roller.
FIGS. 2 and 3 are partial cross-sectional views of embodiments of the present invention. 1... Arbor, 2... Rotating cell, 4, 7... Thrust ring, 5... Needle, 6... Retainer, 8... Collar ring, 9... Retaining ring, 10... Tsubame ring, 1
1... Rubber tip, 13... Cap, 14... Stop ring, 15, 16... Retainer, 17, 18...
Ball, 19...Spacer.

Claims (1)

[Claims] 1. A stop ring made of an elastic material consisting of an annular part and a flange part provided at one end thereof is attached to the stepped part, the rotation cell, and the arbor rotating part support part so that the other end of the stop ring contacts the stepped part of the arbor. and a thrust ring or retainer that holds the needle or ball between the annular parts, and the inner circumferential surface of the annular part is brought into full contact with the outer circumferential surface of the arbor rotating part support part, and the outer circumferential edge of the flange part is A top roller, characterized in that the top roller is tightly fitted into a groove provided in an inner circumferential wall of the rotation cell.