JP2000119830A - Sink roll for hot dip plating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a plated steel sheet of high quality free from defects at a low cost by dipping and fixing a sink roll round which a steel sheet to be plated is wound into a hot dip zinc bath and jetting hot dip zinc from plural nozzles provided on the circumferential wall outwardly. SOLUTION: A cylindrical sink roll 1 round which a steel sheet (x) is wound is dipped into a zinc bath 3 and is supported by a pair of supporting frames 5 in the end face 10a. The lower half part of the circumferential wall 10 of the sink roll 1 is penetratingly provided with plural slit-shaped nozzles 11 elongating in the axial length direction, and an impeller 12 composed of a shaft 12a and a vane 12b is rotatably incorporated coaxially. This impeller 12 is rotated by a driving device arranged at the outside of the plating tank via a joint part 22 provided on the end part of the shaft 12a penetrating the boss part of the frame 5. In this way, the zinc bath 3 is sucked from an inflow port 10b, is pressurized and is jetted from the nozzles 11 to float up the steel sheet (x), and it is run without being brought into contact with the sink roll 1 to prevent the generation of defects such as abrasions or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sink roll (roll in bath) in which a steel sheet is wound and immersed in a metal bath in a continuous hot-dip galvanizing line for galvanizing or the like.

[0002]

2. Description of the Related Art In a continuous galvanizing line for continuously galvanizing long steel plates, a sink roll 1 "is used together with a plating bath (pot) 2 as shown in FIG. The sink roll 1 ″ is a cylindrical roll wound around a steel sheet x and immersed in the zinc bath 3 as shown in the figure. Bathtub 2
In such a plating line having the above, the steel sheet x sent out from an upstream reel (not shown) is subjected to a heat treatment while removing an oxide film in an immediately preceding annealing furnace 4, and then, as shown in the figure, a sink roll 1 ″ is formed. Through the zinc bath 3 in the bathtub 2 to adhere a zinc coating to the surface of the steel plate x. Air is blown from the air knife (not shown) on the bath surface of the zinc bath 3 on the steel plate x. After that, the steel sheet x is cooled and wound on a downstream reel (not shown).

[0003] As shown in Fig. 6, the sink roll 1 "is rotatably supported by a support frame 5 via a bearing 6. In order to newly wind a steel plate x or perform maintenance. The sink roll 1 "is rotatable in order to prevent the surface of the steel sheet x from being damaged by rotating it at an appropriate speed. . That is, the surface (peripheral surface) of the peripheral wall 10 "of the sink roll 1"
And the surface of the steel sheet x are in contact with each other, so that the sink roll 1 ″
The surface of the steel sheet x is prevented from being scratched by smoothing the peripheral surface of the steel plate x and rotating the sink roll 1 "so that there is no difference between the peripheral speed and the feed speed of the latter. As a means for making the peripheral speed of the roll 1 "coincide with the feed speed of the steel sheet x, the sink roll 1" is rotated along with the contacting steel sheet x, or a driving means (not shown) is separately provided. Provided, connected to the sink roll 1 ", and the rotation speed is controlled accordingly. Supporting a sink roll via a frame and a bearing as shown in FIG.
No. 055.

[0004]

In the above-mentioned conventional sink roll, a defect may also occur on the surface of the steel sheet when the sink roll is used for a long time. This is because abrasion of the bearing or the like causes the rotation of the sink roll to be not smooth or the peripheral surface of the sink roll to be not smooth, thereby causing abrasion on the surface of the steel plate.

The reason why the peripheral surface of the sink roll is not smooth is because the peripheral surface of the sink roll is alloyed because it is immersed in a zinc bath at a high temperature exceeding 400 ° C. for a long time. In particular, when a small amount of aluminum is added to the zinc bath to improve the adhesion of the plating layer to the steel sheet surface, the metal layer easily adheres to the sink roll, and the smoothness of the peripheral surface is short. May be impaired.

[0006] In order to prevent the occurrence of defects on the surface of the steel sheet, it is sufficient to replace the bearing and the sink roll as soon as possible. However, if the frequency is increased, the production cost of the plated steel sheet will be considerably increased. In order to replace bearings and sink rolls, the operation of the plating line must be stopped,
This is because it is necessary for the worker to perform a considerable amount of work, and it is naturally necessary to prepare replacement parts.

[0007] The claimed invention provides a sink roll for hot-dip coating which does not damage the surface of a steel sheet even if it is used for a long time without replacement, thereby producing a low-cost and high-quality plated steel sheet. To make it possible.

[0008]

According to a first aspect of the present invention, there is provided a sink roll for hot-dip plating, wherein a steel sheet is wound around the steel roll for plating and immersed in a molten metal bath. A plurality of nozzles are provided above, and the same molten metal is jetted outward from the nozzles in the molten metal bath (therefore, between the peripheral surface of the sink roll and the steel plate).

In this sink roll, the molten metal ejected outward from the nozzle exerts a force on the steel plate in a direction away from the peripheral wall of the sink roll, thereby preventing the peripheral surface from contacting the steel plate. In other words, the molten metal ejected from the nozzle causes the steel plate to float, so to speak,
A fluid (molten metal) film is formed between the steel plate and the peripheral surface of the sink roll.

If the contact between the peripheral surface of the sink roll and the surface of the steel sheet is prevented in this way, even if the bearing is worn as described above or the surface roughness of the sink roll increases, the No defects such as scratches occur on the surface. As long as there is no defect in the steel sheet, it can be used continuously for a long time without replacing the sink roll and the bearing, so that the manufacturing cost of the plated steel sheet can be significantly reduced.

The sink roll according to the second aspect is characterized in that the peripheral wall includes a circular arc surface at a lower portion and does not rotate. The arc surface refers to a part of a cylindrical surface, and is a curved surface that becomes a complete cylindrical surface only when continuous over 360 °. Since the steel sheet is wound, the radius of the arc surface should be determined in consideration of the material and thickness of the plated steel sheet. In addition, the above-mentioned sink rolls include those other than cylindrical rolls generally called “rolls”, but in order to match the names with conventional rolls having a common basic function, “sink rolls” are used. ".

Since the sink roll of the first aspect does not contact the steel plate as described above, there is no inconvenience even if the sink roll rotates at any speed around the central axis as long as it has a cylindrical peripheral wall. However, if the peripheral wall is not rotated as in the second aspect, the structure of the sink roll is simplified in various aspects. For example, a) means for rotating the peripheral wall becomes unnecessary, b) if the peripheral wall does not rotate, the steel plate will be wound around only a specific part of it,
The peripheral wall does not need to be cylindrical and it is sufficient to provide an arcuate surface at the lower part as described above.c) Since the steel plate is wound around only a specific portion on the peripheral wall, the above-described nozzle is connected to the peripheral wall. It suffices if only the section is provided. In addition,
The reason why the cylindrical surface is formed in the portion including the lower portion of the peripheral wall of the sink roll is that the steel plate is wound around the lower portion of the sink roll and fed while being bent in an arc shape as shown in FIG. That is, by providing an arc surface having an appropriate radius at an appropriate portion below the sink roll, contact between the steel plate and the sink roll can be easily prevented, and forcibly bending the steel plate can be avoided.

[0013] The sink roll according to claim 3 further comprises:
An impeller for sending molten metal to the nozzle is built in the peripheral wall. The impeller rotates inside the peripheral wall and functions as an impeller (rotating body) in a centrifugal pump, a vane pump, a gear pump, an axial flow pump, or the like.

In order to eject the molten metal from the nozzle, a pump for applying pressure to the metal is required, and the pump may be disposed anywhere. However, it is optimal that the impeller is built in the peripheral wall as in the case of the sink roll according to the third aspect of the present invention, and that the pump is constituted by the impeller and the peripheral wall corresponding to the pump casing.

The reason why the construction relating to the pump is optimally as described in claim 3 is as follows. A) Since high-temperature molten metal is treated as a fluid, with a general-purpose pump, the internal rotating body and casing
Or, if a dimensional change due to corrosion, wear, alloying or the like is received, the original function may not be exhibited immediately. However, since the sink roll is a large member having a length comparable to the width of the steel sheet and a considerable radius (a radius that does not cause undesired deformation of the steel sheet even if the steel sheet is bent along the length), the inside of the inside thereof If an impeller is provided, a considerably large pump having a large impeller built in a large casing can be constructed. If the casing is large, even if the casing or the impeller suffers some erosion or corrosion due to contact with the molten metal, its function is less likely to be impaired.

B) Even if a large pump is constructed as described above, the pump is provided inside the sink roll and does not occupy any other unique space. for that reason,
In or near the plating bath, there is no inconvenience in equipment arrangement such as an obstacle to the feeding of the steel sheet or the elevation of the sink roll.

C) Since the molten metal to which pressure is applied is ejected from the nozzle on the peripheral wall, the distance from the pump composed of an impeller or the like to the supply destination of the fluid (molten metal) is extremely close, and piping is provided between them. There is no need to provide any other means. Therefore, it is more advantageous in terms of energy efficiency and equipment cost than a case where a pump is provided in another part.

The sink roll of the present invention is supported by a bearing penetrating the side wall of the plating bath, and is disposed so as to be able to advance and retreat on the same axis as the sink roll at the time of immersion (that is, on the extension of the axis of the impeller). The impeller is driven by a drive source provided outside the bath tub through a drive shaft provided and a joint portion that detachably connects the drive shaft. In order to prevent the molten metal in the bathtub from leaking from the periphery of the bearing or the drive shaft supported by the bearing penetrating the side wall of the bathtub, appropriate sealing means having no thermal problem or the like should be provided in the corresponding portion. Deploy.

With such a sink roll, the impeller can be driven extremely efficiently and smoothly.
The cleanliness of the molten metal is easily maintained. The reason is as follows. That is, 1) The rotational driving force generated by the drive source (motor or the like) is transmitted to the impeller via the drive shaft and the joint portion arranged on the same axis as the impeller as described above, and the position of the rotational shaft and There is no intervening gear or chain that changes direction. Therefore, the impeller can be efficiently driven, and can be smoothly rotated at a high speed. When the rotation performance of the impeller is high as described above, the ejection of the molten metal from the nozzle can be stabilized at a high level, and the above-described floating of the steel plate can be smoothly maintained.

2) The impeller can be driven without using gears or chains that operate vertically across the bath surface. Therefore, there is no danger of impurities (dross) floating on the bath surface getting caught in the bath as the impeller is driven.
If the dross on the bath surface is not involved in the bath, the molten metal bath in the bathtub can be kept long and clean.

3) Lifting and lowering of the sink roll for maintenance or the like can be easily performed by operating only the sink roll separately from the drive shaft and the drive source (motor or the like). This is because the drive shaft can move forward and backward in the axial direction and the joint portion can be separated from the drive shaft, so that the drive shaft and the drive source can be separated from the sink roll that moves up and down.

According to a fifth aspect of the present invention, in the sink roll, a space is formed in the peripheral wall where the molten metal does not flow, which is separated from the built-in portion of the impeller, and the impeller driving means is provided in the space. It is characterized by being arranged. The driving means here means a gear, a chain, a belt, or the like. However,
A motor or the like serving as a driving source may be arranged in the space together with these driving means.

In the peripheral wall of the sink roll, it is easy to form a space in which the molten metal does not flow, which is separated from the built-in portion of the impeller, through an appropriate shaft sealing means or the like. According to the fifth aspect of the present invention, since the driving means for the impeller is disposed in the space formed as described above, there is no possibility that the driving means will be inconvenienced by contact with the molten metal. Therefore, as the driving means, those having general specifications used in the atmosphere can be adopted, and the sink roll can be formed at low cost. In addition, since the chain does not cross the bath surface up and down with the drive of the impeller even in this sink roll, dross on the bath surface does not get caught in the bath, and therefore the molten metal bath in the bath tub is removed. You can keep it clean for a long time. When the above-mentioned space into which the molten metal does not flow is a space that is open at the top (a space having an opening above the bath surface), it is also possible to arrange a drive source above that space. On the other hand, if the space is a closed space, it is necessary to arrange a motor or the like as a drive source in the space.

[0024]

1 and 2 show a first embodiment of the present invention. FIG. 1A shows FIGS.
(A) is a side sectional view showing a new sink roll 1 in place of the sink roll 1 ″ shown in FIG. 1 (a), and FIG. 2 is a front view showing driving means and the like for the sink roll 1 of FIG.

The sink roll 1 ″ shown in FIGS. 5 and 6
Similarly to the above, the sink roll 1 is one means for applying galvanization to the steel sheet x. That is, as shown in FIG. 1, it is supported by a pair of support frames 5 and immersed in a zinc bath 3 (containing slightly molten aluminum) of a plating bath 2 with a steel sheet x wound thereon. The peripheral wall 10 of the sink roll 1 is formed in a cylindrical shape having a radius of 10 cm or more in order to smoothly bend the steel sheet x so as not to cause permanent deformation such as wrinkles.

Although the steel sheet x is wound around and guided, the sink roll 1 is configured so that the surface of the steel sheet x does not contact the surface (peripheral surface) of the peripheral wall 10. That is, the sink roll 1 is configured as follows.

A) The peripheral wall 10 is, as shown in FIG.
Is attached so that it does not rotate. The reason why the peripheral wall 10 is not rotated is that it is not necessary to rotate the peripheral wall 10 as long as it does not contact the steel plate x. The support member 1 attached to the end face 10 a of the peripheral wall 10 is attached to the frame 5.
0c is fixedly connected to the front end of the frame 5. Members immersed in the bathtub 2, such as the peripheral wall 10, the frame 5, and an impeller 12 and a drive shaft 21, which will be described later, are formed of a metal having excellent durability against molten zinc, for example, a stainless alloy.

B) A plurality of nozzles 11 are formed in the lower half of the peripheral wall 10 where the steel sheet x is hung. This is because molten zinc is ejected outward from the inside of the peripheral wall 10 through them, and the steel sheet x is floated outward from the peripheral wall 10 by the pressure of the ejected bath liquid. Each nozzle 11 is shown in FIG.
As shown in the figure, the shape is a slit shape extending in the axial direction of the sink roll 1, and the cylindrical peripheral wall 10 is penetrated inside and outside. The reason why the nozzle 11 is formed only in the lower half of the peripheral wall 10 is that the steel plate x
Is applied only to the lower half.

C) The rotating impeller 1 is provided inside the peripheral wall 10.
2 built-in. By applying pressure, the molten zinc in the peripheral wall 10 is ejected outward from the nozzle 11. The impeller 12 includes a shaft 12a and a vane 12b extending radially around the shaft 12a.
As shown in FIG. 1B, both ends of 2a are rotatably supported by passing them through a boss at the tip of the frame 5.

D) The impeller 12 is driven as shown in FIG.
Sink roll 1 at the time of dipping through the side wall of plating bath 2
And a drive shaft 21 (connected to a drive source (not shown) provided outside the bathtub 2) provided on the same axis. This is because such a driving means is optimal in that the force for rotating the impeller 12 is efficiently transmitted along one axis. In order to enable the sink roll 1 to move up and down, the drive shaft 21 is arranged so as to be able to advance and retreat in the axial direction, and the end of the drive shaft 21 and the end of the shaft 12a of the impeller 12 are moved in the axial direction. Are connected by a dog clutch-shaped joint portion 22 which can be separated and connected. The drive shaft 21 is supported by a bearing 23 attached to the side wall of the bathtub 2, but the bearing 23 is immersed in water for the purpose of preventing molten zinc from leaking from a gap between the drive shaft 21 and the shaft house 23. Cooling. By cooling the bearing 23, the molten zinc that enters the gap is solidified (or made into a semi-molten state) to prevent leakage of the molten zinc. In order to cool the bearing 23, a water jacket 23a is formed inside the bearing 23, and cooling water is caused to flow therethrough by the cooling means 24. The cooling means 24 includes a pump 24a, a filter 24d and a tank 24e.
And the like are connected to the jacket 23a via a supply pipe 24b and a reflux pipe 24c.

The sink roll 1 configured as above is
As shown in FIG. 2, the steel plate x is wound around and immersed in the zinc bath 3 in the bathtub 2, and the impeller 12 is rotated by the drive shaft 21 for use. When the impeller 12 rotates, molten zinc flows into the peripheral wall 10 from an inlet 10b provided on the end face of the peripheral wall 10 as shown in FIG. Erupts from When the molten zinc is ejected from the nozzle 11 in this manner, the wound steel plate x is pushed outward, and FIG.
Floating on the peripheral surface of the peripheral wall 10 as described above, contact between the steel plate x and the peripheral wall 10 is prevented. When the steel sheet x is fed in the longitudinal direction in such a state, a galvanized steel sheet having excellent surface properties is manufactured regardless of the state of the peripheral surface of the sink roll 1.

3 and 4 show a second embodiment of the present invention. FIG. 3 is a perspective view of the sink roll 1 ′ partially seen through, and FIG. 4A is a side cross-sectional view of the sink roll 1 ′ (a-a cross section in FIG. 4B). FIG. 4B is a front sectional view of the same sink roll 1 ′ (a sectional view taken along line bb in FIG. 4A).

This sink roll 1 ′ is also used in the continuous galvanizing line in the same manner as the sink roll 1 ″ in FIG.
And immersed in the zinc bath 3.
In addition to the point that the peripheral wall 30 is attached so as not to rotate beyond the end of the frame 5 'as shown in FIG. 3, a plurality of nozzles 31 for ejecting molten zinc are formed in the lower part of the peripheral wall 30 as shown in FIG. This is common to the sink roll 1 shown in FIG. 1 and the like in many respects, such as the fact that the rotating impeller 32 is built in the peripheral wall 30.

However, the sink roll 1 'in FIGS. 3 and 4 differs from the sink roll 1 in the following points. A) The peripheral wall 30 is formed in a box shape having an arc surface 30a only at a lower portion. The arc surface 30a is formed in the lower part so that the steel sheet x is smoothly bent along the curved surface and is smoothly fed without wrinkles or the like. Since the sink roll 1 'does not rotate,
The other parts of the peripheral wall 30 are shown in FIG.
As described above, an arbitrary shape can be obtained on condition that a certain distance or more is taken from the path of the steel sheet x. In the sink roll 1 ', the peripheral wall 30 has an enlarged upper portion so as to have a large internal volume so that driving means for the impeller 32 can be built-in as described later.

B) Inside the peripheral wall 30 formed in a box shape,
A space 30c which is separated from the built-in space 30b of the impeller 32 and into which the molten zinc does not flow is formed. Both spaces 30b
As shown in FIG. 4, the space between 30c is partitioned by a partition wall 34, and a heat-resistant seal member 34a is attached to a portion of the impeller 32 through which the shaft 32a passes. In order to allow the molten zinc to smoothly flow into the built-in space 30b of the impeller 32, a rectangular tubular inlet 30d is also provided in the peripheral wall 30.

C) The driving means and the driving source of the impeller 32 are, as shown in FIG.
0c. The shaft 32a of the impeller 32 is
It is rotatably supported by a bearing 41 provided in the space 30c, and all of the gears 42, 43, and 44 serving as driving means are mounted in the space 30c. The motor 45 as a drive source is also arranged in the same space 30c. Peripheral wall 30
Is not immersed in the zinc bath 3, so a fan or the like (not shown) is provided near the upper end to introduce outside air.
This has the effect of lowering the ambient temperature of the motor 45.

In the sink roll 1 'as well, when the motor 45 is started to rotate the impeller 32, the inlet 3
0d, molten zinc flows into the space 30b, and the impeller 32
And is ejected from each nozzle 31. When the molten zinc is ejected in this way, as shown in FIG.
To prevent the steel plate x from contacting the peripheral wall 30. If such a state is maintained during the feeding of the steel sheet x, it becomes possible to smoothly manufacture a galvanized steel sheet having excellent surface properties regardless of the state of the peripheral surface of the sink roll 1 '.

As described above, two embodiments of the present invention have been introduced. However, it is possible to implement the claimed invention in other embodiments. For example, the nozzles formed on the peripheral wall do not have to be slit-shaped as shown in FIG. 1 and the like, and it is preferable that a large number of nozzles having circular holes are scattered on the peripheral wall. If the range of the opening nozzle can be adjusted to the width of the steel sheet so that the nozzle does not protrude in the width direction from the steel sheet to be wound, the steel sheet can be efficiently floated on the peripheral wall. In the above description, the sink roll immersed in a hot-dip zinc bath for galvanizing has been described. However, in order to perform plating of tin (tin) or aluminum instead of galvanizing, a metal such as hot tin or molten aluminum is used. It is of course possible to implement the invention as a structure of a sink roll immersed in a bath.

[0039]

The sink roll for hot-dip plating according to the first aspect has the following effects. 1) Since the contact between the peripheral surface of the sink roll and the surface of the steel plate is prevented, even if the surface roughness of the sink roll increases,
Thereby, defects such as scratches do not occur on the surface of the steel sheet. Therefore, it is possible to manufacture a high quality plated steel sheet.

2) According to the above 1), since the sink roll can be used continuously for a long time, it is possible to considerably reduce the production cost of the plated steel sheet.

The sink roll according to the second aspect of the present invention further has the following features: (3) Since the peripheral wall is not rotated, a means for rotation is not required, and the shape of the peripheral wall and the arrangement of the nozzles are free. Becomes easier. Thereby, it is also possible to reduce the manufacturing cost.

In the case of the sink roll according to the third aspect, 4) By incorporating the impeller in the peripheral wall, a large-sized impeller can be used, so that the pump function is deteriorated due to contact with the molten metal. Hard to do.

5) The pump for the molten metal is provided inside the sink roll and does not occupy any other inherent space, which is convenient in terms of equipment arrangement.

6) The distance from the pump constituted by the impeller and the like to the supply destination of the molten metal is extremely close, and there is no need to provide piping or the like therebetween, which is advantageous in terms of energy efficiency and equipment cost.

In the case of the sink roll according to the fourth aspect, particularly, 7) regarding the rotation of the impeller, the driving efficiency is high and smooth rotation at high speed can be realized. Therefore, the effect of preventing contact between the peripheral surface of the sink roll and the surface of the steel plate is high.

8) Since there is no danger of impurities (dross) floating on the bath surface being caught in the bath as the impeller is driven, the molten metal bath in the bath tub can be kept long and clean.

9) Lifting and lowering of the sink roll for maintenance and the like can be easily performed while being separated from the drive shaft and the drive source (motor or the like).

According to the fifth aspect of the present invention, in particular, 10) Since the driving means for the impeller is arranged in a space where the molten metal does not flow in the peripheral wall of the sink roll, a driving means having a general specification can be used. It can be used, thus reducing the manufacturing cost of the sink roll.

11) Since there is no danger of dross on the bath surface getting caught in the bath when the impeller is driven, the molten metal bath in the bath tub can be kept long and clean.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention;
FIG. 1A is a side view of the sink roll 1 (a sectional view taken along line aa in FIG. 1B), and FIG. 1B is a front view (a part of which is shown in a sectional view).

FIG. 2 is a front view showing driving means and the like for the sink roll 1 of FIG.

FIG. 3 is a view showing another embodiment of the present invention, which is different from FIG. 1, and is a perspective view of a sink roll 1 ′ partially seen through.

4 (a) is a cross-sectional view (a-a cross-sectional view in FIG. 4 (b)) of the sink roll 1 ′ of FIG. 3, and FIG. 4 (b) is the same sink roll. FIG. 5 is a cross-sectional view (a cross-sectional view taken along the line bb in FIG. 4A) of 1 ′.

FIG. 5 is a side view schematically showing a sink roll 1 ″ and a plating bath 2 in a continuous galvanizing line.

FIG. 6 is a front view showing a conventional sink roll 1 ″.

[Explanation of symbols]

 1 ・ 1 ′ ・ 1 ″ sink roll 2 plating bath 10.30 peripheral wall 11.31 nozzle 12.32 impeller 30c space (space in which molten metal does not flow)

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 13, 1999 (1999.8.1)
3)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

The sink roll for hot-dip plating according to the first aspect of the present invention is a method in which a steel plate is wound around a hot-dip metal bath for plating, and is immersed in a molten metal bath .
A configuration in which multiple nozzles are provided on the peripheral wall around which the steel sheet is wound, and the same molten metal is ejected outwardly from the nozzles (therefore, between the peripheral surface of the sink roll and the steel sheet) in the molten metal bath. It is characterized by.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011] The sink roll according to claim 1 further comprises:
An impeller that sends the molten metal to the nozzle in the above peripheral wall
Also features a built-in. An impeller is a part of the surrounding wall
Centrifugal pump, vane pump, gear
As an impeller (rotating body) in pumps and axial flow pumps
What works.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

In order to eject molten metal from the above nozzle,
Requires a pump to apply pressure to the metal.
Yes, the pump can be placed anywhere.
No. However, as in the case of the sink roll of claim 1, the peripheral wall
Built-in impeller inside, the impeller and pump casing
And the surrounding wall corresponding to
It is best to place it.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

[0013] The structure relating to the pump is described in this claim 1.
The reason why it is optimal to do so is as follows. You
That is, a) a general-purpose pump for handling hot molten metal as a fluid
In the pump, the internal rotating body and casing are slightly eroded,
Or undergo dimensional changes due to corrosion, wear, alloying, etc.
As a result, the original function may not be exhibited immediately. I
However, the sink roll has a length equal to the width of the steel plate
Significant radius (convenient for bending steel plate along it
Large part having a radius that does not cause large deformation)
Because it is a material, if you install an impeller inside it,
Quite large port with a large impeller built in the casing
Pumps can be configured. If large, molten metal
Contact with the casing may cause some melting of the casing and impeller.
Even if it is damaged or corroded, its function may be impaired.
This is small.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

B) A large pump is constructed as described above.
Even so, the pump is located inside the sink roll.
It does not occupy any other unique space. for that reason,
In or near the plating bath, feed or shrink the steel sheet.
Inconvenience in equipment arrangement such as hindrance to lifting
Never invite.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

C) pressurized molten metal with a nozzle on the peripheral wall
Port, which is composed of impellers, etc.
From the pump to the supply destination of the fluid (molten metal)
Also, there is no need to provide piping or the like between them. Accordingly
Energy efficiency compared to providing a pump in other parts.
This is advantageous in terms of rate and equipment cost.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

[0016] The sink roll according to the second aspect is the above-mentioned sink roll.
The peripheral wall shall not rotate, including an arc surface at the bottom.
It is also characterized by that. An arc surface is a part of a cylindrical surface.
A complete cylinder for the first time over 360 °
A curved surface. Because the steel plate is wound around,
The radius of the arc surface is determined in consideration of the material and thickness of the plated steel sheet.
Should be turned on. In addition, the sink roll described above
Includes not only cylindrical ones, which are generally called "rolls"
It will be rare, but the conventional
In order to match the name of the
And

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

[0017] The sink roll according to claim 1 is as described above.
Since it does not come into contact with a steel plate, it has a cylindrical peripheral wall.
Above is inconvenient to rotate at any speed around the central axis
There is no. However, as in the case of the second aspect, the peripheral wall is rotated.
If you do not want to turn it, the structure of the sink roll in various aspects
Becomes easier. For example, a) a hand to rotate the peripheral wall
No step is required.b) If the peripheral wall does not rotate,
Because the steel plate will be wound around only certain parts,
It is not necessary to make the peripheral wall cylindrical, and a circle
It is sufficient to provide an arc surface.c) Again, a specific part on the peripheral wall
Since the steel plate is wound around the nozzle,
It is sufficient if it is provided only on a part of the wall. Note that
A cylindrical surface is formed on the part of the peripheral wall of the crawl including the lower part
What is necessary is to wind the steel sheet around the bottom of the sink roll as shown in Fig. 5.
This is because they are sent while being bent in an arc shape.
In other words, the right radius at the right bottom of the sink roll
The steel sheet and the sink roll
Can be easily prevented from coming into contact with
It can be avoided.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

The sink roll according to the third aspect is supported by bearings penetrating the side wall of the plating bath and is disposed so as to be able to advance and retreat on the same axis as the sink roll when immersed (that is, on the extension of the axis of the impeller). The impeller is driven by a drive source provided outside the bath tub through a drive shaft provided and a joint portion that detachably connects the drive shaft. In order to prevent the molten metal in the bathtub from leaking from the periphery of the bearing or the drive shaft supported by the bearing penetrating the side wall of the bathtub, appropriate sealing means having no thermal problem or the like should be provided in the corresponding portion. Deploy.

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

According to a fourth aspect of the present invention, there is provided a sink roll, wherein a space is formed in the peripheral wall so as to prevent molten metal from flowing in from a built-in portion of the impeller, and a driving means for the impeller is provided in the space. It is characterized by being arranged. The driving means here means a gear, a chain, a belt, or the like. However,
A motor or the like serving as a driving source may be arranged in the space together with these driving means.

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

In the peripheral wall of the sink roll, it is easy to form a space in which the molten metal does not flow, which is separated from the built-in portion of the impeller, through an appropriate shaft sealing means or the like. In the sink roll according to the fourth aspect of the present invention, since the driving means for the impeller is disposed in the space formed as described above, there is no possibility that the driving means may be inconvenienced by contact with the molten metal. Therefore, as the driving means, those having general specifications used in the atmosphere can be adopted, and the sink roll can be formed at low cost. In addition, since the chain does not cross the bath surface up and down with the drive of the impeller even in this sink roll, dross on the bath surface does not get caught in the bath, and therefore the molten metal bath in the bath tub is removed. You can keep it clean for a long time. When the above-mentioned space into which the molten metal does not flow is a space that is open at the top (a space having an opening above the bath surface), it is also possible to arrange a drive source above that space. On the other hand, if the space is a closed space, it is necessary to arrange a motor or the like as a drive source in the space.

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction contents]

Further, 3) the impeller is built in the peripheral wall.
And allows the use of large impellers and therefore molten metal
Of the pump function due to contact with the metal
No.

[Procedure amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction contents]

4) The pump for the molten metal is
It is located inside and does not take up any other unique space.
This is convenient in terms of equipment arrangement.

[Procedure amendment 15]

[Document name to be amended] Statement

[Correction target item name] 0043

[Correction method] Change

[Correction contents]

5) Is the pump composed of an impeller or the like
Is very close to the supply of molten metal,
Energy efficiency and equipment costs
It is advantageous in regard to this.

[Procedure amendment 16]

[Document name to be amended] Statement

[Correction target item name] 0044

[Correction method] Change

[Correction contents]

In the case of the sink roll according to the second aspect, furthermore,
A, 6) it does not rotate the peripheral wall, unnecessary means for rotation
And the shape of the peripheral wall and the nozzle arrangement become free.
The configuration of the crawl becomes easy. As a result, manufacturing costs
Can be lowered.

[Procedure amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0045

[Correction method] Change

[Correction contents]

In the case of the sink roll according to the third aspect , particularly, 7) in terms of rotating the impeller, it is possible to realize high driving efficiency and smooth rotation at high speed. Therefore, the effect of preventing contact between the peripheral surface of the sink roll and the surface of the steel plate is high.

[Procedure amendment 18]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction contents]

In the case of the sink roll according to the fourth aspect of the present invention, particularly, 10) since the driving means for the impeller is arranged in a space where the molten metal does not flow in the peripheral wall of the sink roll, a driving means having a general specification can be used. It can be used, thus reducing the manufacturing cost of the sink roll.

Claims (5)

[Claims] 1. A sink roll wound with a steel sheet for plating and immersed in a molten metal bath, the sink roll having a plurality of nozzles on a peripheral wall around which the steel sheet is wound, and having a plurality of nozzles. A sink roll for hot-dip plating characterized by ejecting the same molten metal outward from those nozzles. 2. The sink roll for hot-dip plating according to claim 1, wherein the peripheral wall includes a circular arc surface at a lower portion and does not rotate. 3. The sink roll for hot-dip plating according to claim 1, wherein an impeller for sending molten metal to a nozzle is built in the peripheral wall. 4. A drive shaft which is supported by a bearing penetrating the side wall of the plating bath and which is disposed on the same axis as the sink roll at the time of immersion so as to be able to advance and retreat, and is detachably connected to the drive shaft. The sink roll for hot-dip plating according to claim 3, wherein the impeller is driven by a drive source provided outside the bathtub via the joint. 5. A space in which the molten metal does not flow, which is separated from the built-in portion of the impeller, is formed in the peripheral wall, and a driving means for the impeller is disposed in the space. The sink roll for hot-dip plating according to claim 3.