JPH0397837A - Rolling bearing for supporting roll in molten plating bath and supporting device thereof - Google Patents

Abstract

PURPOSE:To support a rolling bearing to a supporting arm as easily fitting/ removing by fitting, etc., a supporting block between one pair of outer part projections formed at outer circumferential face of a supporting bracket of the rolling bearing. CONSTITUTION:The rolling bearing 9 is constituted of an inner ring 10, outer ring 11, plural rolling bodies 12 arranged in inner circumferential face of the outer ring 11 and the supporting bracket 14 fixed at outside of the outer ring 11. One pair of the outer part projections 17 are formed at both end parts of outer circumference in the supporting bracket 14. A supporting part 21 is formed at lower end part of the supporting arm 8 for supporting the rolling bearing 9, and upper edge and inside edge in the supporting part 21 are made to first and second supporting edges 19, 20 mutually crossed at the right angle. The supporting blocks 22, 23 are fixed to these supporting edges 19, 20. The supporting blocks 22, 23 are fitted between one pair of the outer part projections 17 to support the rolling bearing 9 on the supporting part 21 in the supporting arm 8. By this method, the rolling bearing 9 can support a roll at a low force.

Description

[Detailed Description of the Invention] (Industrial Application Field) A rolling bearing (cylindrical roller bearing, ball bearing, spherical roller bearing, etc.) for supporting rolls in a hot-dip plating bath and its support device according to the present invention It is incorporated into a plating processing apparatus for continuously applying hot-dip plating to the surface of a steel plate, and is used to rotatably support a roll for guiding the steel plate or pressing molten metal onto the steel plate.

(Prior art) When forming a plating layer of another metal on a metal surface, in addition to plating by electrochemical treatment, a so-called plating method is used in which the core metal is immersed in a plating bath in which the other metal mentioned above is melted. Plating treatment using a hot-dip plating bath is widely practiced.

When galvanizing the surface of a long steel plate using such a hot-dip plating bath, for example, it is carried out using an apparatus as shown in FIG.

That is, a steel plate 1 sent out from an uncoiler (not shown) is introduced into a plating tank 4 in which molten zinc 3 is stored while being guided by appropriate conveyance rollers 2, 2, and then guided by guide rollers 5 provided in the plating tank 4. The steel plate 1 with the molten zinc 3 adhered to the surface thereof is folded back and taken out of the plating tank 4. The plated steel sheet 1a that has been taken out is cooled and solidified to remove zinc adhering to its surface, and then wound into a recoiler (not shown). Further, a pair of pressing rollers 6, 6 are provided just before the steel plate 1 comes out of the molten zinc 3, and the molten zinc 3 is pressed so as to be imprinted on both sides of the steel plate 1 by both pressing rollers 6, 6. 3 and the steel plate 1 is improved.

As mentioned above, while immersed in hot molten zinc 3,
The guide roller 5 and pressing rollers 6, 6, which rotate while guiding the steel plate 1 or pressing the steel plate 1, are attached to the tips of support arms 7, 8, respectively, via sliding bearings or rolling bearings. It is rotatably supported.

(Problem to be Solved by the Invention) However, since the bearing for rotational support is installed in high-temperature molten zinc 3, when a sliding bearing is used as the bearing, it suffers from severe wear and requires maintenance such as replacing the bearing. It is inevitable that the work will become troublesome.

In addition, when a sliding bearing is used as a bearing for rotational support, the torque required to rotate the guide roller 5 and the pressing rollers 6, 6 becomes large, and the force for winding up the steel plate 1a alone is not enough to support each roller 5. , 6 are difficult to rotate sufficiently, each roller 5, 6 is rotated in synchronization with the feeding of the steel plates 1, 1a.
A mechanism for rotationally driving the plating process is required, which inevitably complicates the structure of the plating processing equipment.

In order to eliminate such inconvenience, the Utility Model 61-90852
JP-A No. 1-159359 describes a structure in which a roller provided in a plating tank is rotatably supported by a rolling support.

However, the end of the support arm of the bird that supports the roller in the plating bath containing molten zinc, etc., is not structured to be equipped with a rolling bearing like in general machinery, so if it is left as it is, it will not be equipped with a rolling bearing. cannot be supported by

In other words, even if a support structure using rolling bearings is adopted,
In order to easily maintain and manage rolling bearings and rollers that are exposed to high temperatures, it is necessary to be able to easily attach and detach rolling bearings and rollers, but conventional products have not met this requirement. There was no structure.

The rolling bearing for supporting rolls in a hot-dip plating bath and its supporting device of the present invention were conceived in view of the above-mentioned circumstances.

(Means for Solving the Problems) Among the rolling bearing for supporting rolls in a hot-dip plating bath and its support device of the present invention, the rolling bearing has a shaft protruding from the end face of a roll provided in a hot-dip plating bath that is fitted inside the rolling bearing. between an inner ring rotating together with the roll, an outer ring provided concentrically with the inner ring, an inner raceway provided on the inner periphery of the outer ring, and an outer raceway provided on the outer periphery of the inner ring. It consists of a plurality of rolling elements provided and a support bracket fixed to the outer ring, and a pair of outward flange-shaped outward protrusions extending all the way around is formed at both ends of the outer peripheral surface of the support bracket. It is made up of things.

Further, the support device includes a rolling bearing configured as described above,
It consists of a support arm for supporting the rolling bearing, and a band for inseparably connecting the support arm and the rolling bearing. Second and second support blocks respectively fixed to first and second support edges that intersect with each other and formed on the support ends of the support arms are attached to the outer circumferential surface of the support bracket constituting the rolling bearing. The middle part of the band, which is fitted between the pair of outer protrusions formed and whose both ends are fixed to the support arm, is on the opposite side from the first and second support blocks. In this case, it fits between the pair of outer protrusions.

(Function) In the case of the rolling bearing for supporting rolls in a hot-dip plating bath and its supporting device of the present invention configured as described above, there are grooves between a pair of outer protrusions formed on the outer peripheral surface of the support bracket. By fitting the first and second support blocks, and fitting the middle part of the band whose both ends are fixed to the support arms between the pair of outer protrusions, the rolling bearing for supporting the roller can be installed. It is possible to securely support the end of the support arm.

By regulating the mounting direction of the rolling bearing, when the rolling bearing is mounted on the tip of the support arm, the load applied to the roller is transferred to the first and second support blocks. , it can be supported reliably by the second support 3.

Also, by attaching and detaching the end of the band to the supporting arm,
The rolling bearing can be easily attached to and removed from the support arm, making maintenance work for the rolling bearing and rollers easier.

(Example) Next, the present invention will be explained in more detail while explaining the illustrated embodiment.

1 and 2 show a first embodiment of the present invention, with FIG. 1 being a side view and FIG. 2 being a cross-sectional view taken along the line AA in FIG.

In the illustrated embodiment, a pressure roller 6 provided in a hot-dip plating bath is rotatably supported by a rolling bearing 9 at the lower end of a support arm 8.

The rolling bearing 9 includes an inner ring 10, an outer ring 11 provided concentrically with the inner ring 10, an inner raceway provided on the inner peripheral surface of the outer ring 11, and an outer raceway provided on the outer peripheral surface of the inner ring 10. It consists of a plurality of rolling elements 12.12 which are provided between the outer ring 11 and the outer ring 11, and which are held by a retainer 13, and a support bracket 14 which is fixed to the outside of the outer ring 11. Among the parts, inner ring 10, outer ring 11, rolling element 1
2 and 12 are each made of a material conventionally used as a material for bearings that require heat resistance, such as sintered metal, and the retainer 13 and support bracket 14 are each made of stainless steel or the like. It will be done.

An inward flange-shaped inner protrusion 15 is provided at one end of the inner circumferential surface of the support bracket 14 (the left end in FIG. 2), and when the outer ring 11 is fitted inside the support bracket 14, One end surface (the left end surface in FIG. 2) of the outer ring 11 is abutted against the inner surface of the inner protrusion 15. Further, the other end surface of the outer ring 11 is opposed to the inner surface of a stop ring 16 which is engaged with the inner periphery and other end of the support bracket 14. As a result, the support bracket 14 is inseparably connected to the outside of the outer ring 11, and
1 and the support bracket 14 can now be handled as one.

As described above, on both ends of the outer circumferential surface of the support bracket 14 fixedly installed on the outside of the outer ring 11, there are outward flange-shaped outward protrusions 17 extending around the entire circumference of the support bracket 14.
, 17 are formed as a pair. Further, on the outer circumferential surface of the support bracket 14, a portion 18 located between the pair of outer protrusions 17, 17 forms a cylindrical surface parallel to the center @a of the rolling bearing 9.

On the other hand, a substantially L-shaped support part 21 is formed at the lower end of the support arm 8 for supporting the rolling bearing 9 configured as described above, and the upper edge and inner edge of this support part 21 are formed. are the first and second support edges 19 and 20 that are orthogonal to each other.

Second and second support blocks 22 and 23 are fixed to the first and second support greens 19 and 20, respectively.

The width dimension W of each of these support blocks 22 and 23 is determined by a pair of outer protrusions 1 formed on the outer peripheral surface of the support bracket 14.
Slightly smaller than the interval W between 7 and 17<(w<W)L
/ing.

When the rolling bearing 9 is supported by the support part 21 provided at the lower end of the support arm 8, the first and second support blocks 22, 23 are connected to the pair of outer protrusions 17, 1
Insert it between 7.

In the case of the embodiment shown in FIG. 2, the top surface of the first support block 22 (although not shown,
(The same applies to the inner surface of), which forms a cylindrical convex surface.

Furthermore, both upper and lower ends of a band 24 made of stainless steel or the like are fixed to both upper and lower ends of the support part 21 provided at the lower end of the support arm 8 by suitable means such as screws. The intermediate portion of the band 24 fits between the pair of outer protrusions 17, 17 on the opposite side of the first and second support blocks 22, 23, and the rolling bearing 9 This prevents the support arm 8 from falling off the support section 21 provided at the lower end thereof. However, when the pressure roller 6 is used, a rolling bearing 9 is attached to the first and second support blocks 22, 23 on the pressure roller 6, as shown by arrow b in FIG. 1, based on the tension of the steel plates 1, 1a. A pressing force is applied to the band 24, and no load is applied to the band 24. Therefore, it is sufficient for the band 24 to have enough strength to prevent the rolling bearing 9 from falling off when not in use.

The end of the pressing roller 6 is rotatably supported by the rolling bearing 9 which is constructed as described above and is supported by the support portion 21 provided at the lower end of the support arm 8 as described above.

That is, the shaft 25 protruding from the center of the end surface of the pressure roller 6 is
The outer edge of a short cylindrical spacer 26 is inserted into the inside of the inner ring 10 constituting the rolling bearing 9 and fitted onto the base end of the shaft 25, and the end of the shaft 25 is fitted onto the outer edge of the spacer 26. bolt 27
, 27 are fixed to this shaft 25, and the inner ring 10 is strongly clamped between the inner edge of a bottomed short cylindrical presser 28, and the shaft 25 is fixed inside the inner ring 10. There is.

The rolling bearing for supporting rolls in a hot-dip plating bath and its support device according to the present invention are configured as described above, so that support for the pressure roller 6 (the same applies to the guide roller 5) in a hot-dip plating bath is possible. It can be done reliably and maintenance work can be done easily.

That is, when the shaft 25 provided at the end of the pressure roller 6 is rotatably supported at the lower end of the support arm 8, the shaft 25 provided at the end of the pressure roller 6 is rotatably supported by the The first and second support blocks 22, 23 are fitted between the pair of outer protrusions 17, 17.

In this state, the pressure roller 6 is supported by the support portion 21 at the lower end of the support arm 8 via the rolling bearing 9.
In this state, when the rolling bearing 9 is not in use, the rolling bearing 9 is
1, so both ends are attached to the support part 21.
The intermediate portion of the band 24 fixed to both upper and lower ends of the band 24 is also fitted between the pair of outer protrusions 17, 17.

As a result, the rolling bearing 9 that supported the pressure roller 6 is prevented from moving away from the support section 21, and the rolling bearing 9 can be reliably supported with respect to the support section 21.

As described above, the mounting direction of the rolling bearing 9 on the support portion 21 is determined by the direction in which the pressure roller 6 is attached as the pressure roller 6 is used.
As shown by arrow b in FIG. 1, the rolling bearing 9 is attached to the support part 21 in order to restrict the force applied in the direction of pressing the rolling bearing 9 to the first and second support blocks 22 and 23. In this state, the load applied to the pressure roller 6 is transferred to the support portion 21 via the first and second support blocks 22 and 23.
It is reliably supported by the first and second support edges 19 and 20 of the. In this case, no load is applied to the band 24.

In addition, when performing maintenance work such as replacing the rolling bearing 9 or inspecting the pressing roller 6, the upper and lower ends of the band 24 are attached to and detached from the support part 21 of the support arm 8, thereby removing the rolling bearing 9 and the pressure roller 6. The pressure roller 6 supported by the rolling bearing 9 can be easily attached to and detached from the support portion 21.

In this way, when attaching and detaching the press roller 6, the press roller 6 cannot be kept in a horizontal state, and the center line C of the rolling bearing 9 provided around the shaft 25 may be inclined with respect to the vertical line. However, in the case of the embodiment shown in Fig. 2, the upper surface of the first support block 22 is rounded to a cylindrical convex surface.
Even if the rolling bearing is tilted to some extent as described above, the load is reliably supported by the support block 22, and no unnecessary stress (edge load) is applied to the rolling bearing 9.

In this way, in order to ensure that the load is supported by the support block 22 and to prevent excessive stress from being applied to the rolling bearing 9, the upper surface of the first support block 22 is made to have a cylindrical convex surface. Instead (or the first support block 22
The upper surface is a cylindrical convex surface), and as in the second example shown in FIG. Article 17, 17
The portion 18 located in between can also be made into a spherical convex surface. Furthermore, in the illustrated embodiments, a support bracket 14, which is made separately from the outer ring 11, is fixed to the outside of the outer ring 11 constituting the rolling bearing 9.
and the support bracket 14 may be integrally formed.

In the illustrated embodiment, a general cylindrical roller bearing is shown as the rolling bearing, but ball bearings, spherical roller bearings, etc. can also be used as the rolling bearing that constitutes the present invention. . In this case, if a spherical roller bearing is used as the rolling bearing, there is no need to incorporate an alignment mechanism between the support bracket 14 and the first and second support blocks 22 and 23. That is, when a spherical roller bearing is used, the portion 18 between the outer protrusions 17, 17 of the support bracket 14 is a mere cylindrical surface, and the first and second support blocks 22, 2
It is also possible to make the top surface or side surface of 3 a flat surface.

(Effects of the Invention) The rolling bearing for supporting rolls in a hot-dip plating bath of the present invention and its support device operate as described above.
Rolling bearings, which are more durable than sliding bearings and can support the rolls with less force, are used for the support arms.
It can be supported reliably and easily attached and detached.

Therefore, it is possible to reduce the number of maintenance and inspection operations of the plating processing apparatus using the molten plating bath, and to make the operation itself easier.

[Brief explanation of drawings]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a side view, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a second embodiment of the present invention. A sectional view similar to FIG. 2, showing
The figure is a schematic longitudinal sectional side view showing an example of a plating processing apparatus using a hot-dip plating bath. 1, 1a: Wi plate, 2: Conveyance roller, 3: Molten zinc, 4
: plating tank, 5: guide roller, 6: pressure roller, 7,
8: Support arm, 9: Rolling bearing, 10: Inner ring, 11: Outer ring, 12: Rolling element, 13: Cage, 14: Support bracket, 15: Inner protrusion, 16: Stop zone, l7: Outer protrusion Article, 18: Part, 19: First support edge, 20: Second support edge, 21: Support portion, 22; First support block, 2
3: Second support block, 24: Band, 25 axis, 26
: Spacer, 27: Bolt, 28: Holder. Patent applicant Hiki Seiko Co., Ltd. agent Kinzo Koyama (and 1 other person) -241-

Claims (9)

[Claims] (1) An inner ring that rotates together with the roll by fitting a shaft protruding from the end face of a roll provided in a hot-dip plating bath, an outer ring provided concentrically with this inner ring, and an outer ring provided on the inner circumferential surface of this outer ring. It consists of a plurality of rolling elements provided between an inner raceway and an outer raceway provided on the outer circumferential surface of the inner ring, and a support bracket fixed to the outer ring, and both ends of the outer circumference of the support bracket. A rolling bearing for supporting rolls in a hot-dip plating bath, in which a pair of outward flange-shaped outward protrusions extending over the entire circumference is formed. (2) The support bracket is externally fixed to the outer ring.
The rolling bearing for supporting rolls in a hot-dip plating bath according to claim 1. (3) The rolling bearing for supporting rolls in a hot-dip plating bath according to claim 1, wherein the support bracket is integrally formed with the outer ring. (4) The part of the outer peripheral surface of the support bracket located between the pair of outward protrusions forms a cylindrical surface parallel to the axis;
A rolling bearing for supporting rolls in a hot-dip plating bath according to any one of claims 1 to 3. (5) In the hot-dip plating bath according to any one of claims 1 to 3, a portion of the outer circumferential surface of the support bracket located between the pair of outward protrusions forms a spherical convex surface. Rolling bearings for supporting rolls. (6) The rolling bearing for supporting rolls in a hot-dip plating bath according to any one of claims 1 to 5, wherein the inner ring, the outer ring, and the plurality of rolling elements are each made of sintered metal. (7) The rolling bearing for supporting rolls in a hot-dip plating bath according to any one of claims 1 to 6, a support arm for supporting the rolling bearing, and the supporting arm and the rolling bearing inseparably coupled. first and second support blocks fixed to mutually intersecting first and second support edges formed at the support end of the support arm constitute the rolling bearing. The intermediate portion of the band, which is fitted between a pair of outward protrusions formed on the outer circumferential surface of the support bracket and whose both ends are fixed to the support arm, is connected to the first and second bands. A support device for a rolling bearing for supporting a roll in a hot-dip plating bath, which is fitted between the pair of outer protrusions on the opposite side of the support block. (8) The roll support in a hot-dip plating bath according to claim 7, wherein the portions of the surfaces of the first and second support blocks that come into contact with the outer peripheral surface of the support bracket form a cylindrical convex surface. Support device for rolling bearings. (9) The support device for a rolling bearing for supporting a roll in a hot-dip plating bath according to claim 7, wherein the portions of the surfaces of the first and second support blocks that come into contact with the outer peripheral surface of the support bracket are flat surfaces.