JPH0320420A - Variable crown type carrying roll - Google Patents

Abstract

PURPOSE:To improve the responsiveness at the time of varying the roll crown quantity by adjusting pressure of fluid packed in inner part of a pressurized chamber arranged along inner wall of roll barrel part of an elastic cylindrical body and varying the diameter of roll barrel part in the axial direction. CONSTITUTION:In the inner part of the roll barrel part 1 composed of the elastic cylindrical body, the cylinder 4 for forming pressurizing chamber 3 is set on the concen tric axis. The pressurizing chamber 3 is divided into sectional chambers 6, 7 with a parting wall 5. The cylinder 4 provides plural through holes 8 opening to the roll barrel part 1 side and the pressure in the sectional chambers 6, 7 is added to the roll barrel part 1. Guide pipes 9a, 9b inserted into the sectional chambers 6, 7 through shaft centers of roll shafts 2a, 2b, respectively, are connected and the fluid is led forcedly therefrom. The guide pipes 9a, 9b are connected to a fluid source 12 through a changeover unit 10 and pressur adjusting unit 11. By adjusting the fluid pressure, the volume of pressurizing chamber 3 is increased/decreased and the diameter of roll barrel part 1 is varied in the axial direction to make the roll crown variable. The pressure to the sectional chambers 6, 7 can be independently adjusted and the diameters at center part and edge parts of roll barrel part 1 can be independently adjusted.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is applicable to continuous processing lines for strips, such as continuous annealing lines for copper strips, surface treatment lines typified by hot-dip plating, etc. This invention relates to a conveyance roll used for.

In the continuous processing line for the above-mentioned strips (hereinafter, the strip will be explained as an example), meandering of the copper strip tends to occur during transportation, mainly due to poor shape of the copper strip, and it is important to control this meandering stably. Indispensable for operations.

(Prior art) Regarding the meandering control of the tuning belt, for example, Japanese Patent Application Laid-Open No. 63-610
No. 4, No. 6105, and No. 6106 disclose methods using tires, disks, and jets, respectively, but the contact area with the steel strip is small, the copper strip is easy to slip, and the steel strip Depends on defective shape, etc.
Its control ability is still insufficient. On the other hand, if a centering function of the copper strip is added to the conveyor roll, that is, a crown is added to the conveyor roll,
Meandering can be stably corrected. However, since the meandering of the copper strip varies depending on the material, shape, size, processing conditions, etc. of the copper strip, it cannot be handled with a fixed crowned roll. Therefore, various proposals have been made regarding a conveyance roll that has a centering function that can cope with various meanderings by changing the crown of the conveyance roll.

Namely, Utility Model No. 55-172359, Utility Model No. 55-1
No. 7472, JP-A-56-150125, JP-A No. 61-2
No. 10129 and Japanese Patent Publication No. 63-39648.

(Problem B that the invention seeks to solve) However, in all of the above rolls, the mechanism for changing the crown is complicated and takes up installation space, and the problem remains that the amount of crown variation is small. The majority of cases have low responsiveness.

It is an object of the present invention to propose a transport roll that has a simple mechanism, does not take up much installation space, has high responsiveness when changing the amount of crown, and has a large amount of change.

(Means for Solving the Problems) The present invention provides a roll that controls the conveyance of a strip in a continuous processing line for strips, and includes a roll cylinder made of an elastic cylinder and a pressurizing chamber that supports the inner wall of the roll cylinder. In addition, the pressurization chamber is made up of a variable crown conveyor roll consisting of multiple chambers divided by partition walls and means for adjusting the pressure of the fluid filled in each chamber, and in particular, the pressurization chamber is supported at the center of the roll cylinder by a partition wall of a diaphragm. This is a variable crown type conveyor roll that is divided into an inner chamber that supports the roll body and an outer chamber that supports the roll body end.

Here, the elastic cylindrical body is a cylindrical body made of a material that has both appropriate elasticity and rigidity.For example, if you want to increase the amount of change in roll crown, use rubber with steel cord (the same structure as a radial tire can be applied). On the other hand, when rigidity is required when the amount of roll crown is extremely small or when used in a high temperature atmosphere, it is advantageous to use a thin metal plate such as stainless steel (used within the elastic limit of metal).

Also, the fluid filled in each chamber of the pressurized chamber is the material of the partition wall! (diaphragm model) and operating temperature, or the design of the transport roll itself, but if the gas is used in the processing line to which this transport roll is applied, it will be safe even in the event of a leak. It is harmless and convenient.

(Function) The conveying roll of the present invention adjusts the pressure of the fluid filled inside the pressurizing chamber provided along the inner wall of the roll body, that is, the elastic cylindrical body, and increases or decreases the volume of the pressurizing chamber.
The roll crown is made variable by changing the diameter of the roll cylinder in its axial direction. In particular, since the fluid pressure to each chamber constituting the pressurized chamber can be adjusted independently, for example, the diameter between the center of the roll cylinder and the end of the roll cylinder, or the diameter of each roll cylinder end can also be adjusted independently, making it possible to adjust the variable width of the roll crown. It can be expanded further.

(Example) Fig. 1 shows a preferred example of the variable crown conveying roll according to the present invention.

In the figure, reference numeral 1 denotes a roll cylinder made of an elastic cylindrical body, and flanged roll shafts 2a and 2b are fitted into the openings of this roll cylinder 1 to secure the outer shell of the transport roll.

On the other hand, inside the roll cylinder 1, a cylinder 4 in the form of a pressurizing chamber 3 is disposed coaxially with the roll cylinder 1 inside a cylindrical body that contacts the inner wall of the cylinder 1, and this pressurizing chamber 3 is connected to the partition wall 5. two compartments 6,
It is divided into 7. Furthermore, the cylinder 4 is provided with a large number of through holes 8 that open toward the roll cylinder 1 side, so that the pressure in the compartments 6 and 7 can be applied to the roll cylinder 1.

Further, an introduction pipe 9a inserted from the outside through the axis of the roll shaft 2a is connected to the compartment 6, and an introduction pipe 9b inserted through the axis of the roll shaft 2b is similarly connected to the compartment 7. and pressurize fluid into the respective compartments from each inlet tube.

These introduction pipes 8 and 9 are connected to a fluid source 12 via a switching unit 10 and a pressure adjustment unit 11. Note that the switching unit IO is responsible for switching the compartment into which fluid is pressurized, and the pressure adjustment unit 11 is responsible for adjusting the fluid pressure manually.

If the above-mentioned conveyance roll is used, for example, if the strip plate 13 moves toward the A side as shown in Fig. 2, it is only necessary to correct the strip plate 13 by moving it to the B side, depending on the meandering amount and meandering speed of the strip plate. Based on this, the fluid pressure in the compartment 7 is increased, the roll crown is changed, the strip is moved to the B side, and the meandering is corrected.

If the centering function of the roll is particularly important, it is advantageous to increase the diameter of the cylinder 4 at the middle part and provide a crown in advance, as shown in FIG. In other words, if the fluid pressure in the compartment 7 is increased when the strip plate 13 moves toward the A side as shown in FIG. 2, the meandering can be corrected more efficiently as shown in FIG. can.

Back encirclement 1 Another embodiment according to the invention is shown in FIG.

In this example, a pressurizing chamber 3 forming an annular shape inside the roll cylinder 1 along its inner wall is partitioned by a small-diameter cylinder 4 disposed coaxially with the roll cylinder 1, and this pressurizing chamber 3 is further divided by a partition wall of a diaphragm. 5 into an inner chamber 6a and outer chambers 7a and 7b. The partition wall 5 is basically made of an elastic body made of the same material as the roll cylinder, and its both edges are fixed to the cylinder 4, and the middle part is fixed to the inner wall at the center of the roll r+i.

Further, an introduction pipe 9C inserted from the outside through the axis of the roll shaft 2a is connected to the inner chamber 6a, and similarly the outer chambers 7a and 7b are connected to each other.
The introduction pipes 9d are connected to each other through the partition tube 4, and each introduction pipe 9
Pressure fluid into the inner chamber 6a and outer chambers 7a and 7b from c and 9d. These introduction pipes 9c and 9d are connected to a fluid source 15 via a rotary coupler 14, and are supplied with fluid from there.

Furthermore, each introduction pipe 9C, 9d between the rotary coupler 14 and the fluid source 15 includes a pressurizing valve 16 and its operating unit l.
7. A pressure reducing valve 18, its operating unit 19 and a pressure sensor 20 are attached, respectively. Each operating unit 17, 19 opens and closes the pressurizing valve 16 and the pressure reducing valve 17 according to a command from the controller 21, and adjusts the fluid pressure in the inner chamber 6a and the outer chambers 7a, 7b. Furthermore, the measurement results from the pressure sensor 20 and the meandering sensor 22 are input to the controller 2l, and the fluid pressure is adjusted based on this information.

For example, the fluid pressure P in the inner chamber 6a. and the fluid pressure PR of the outer chambers 7a and 7b as P. When ξP2 is set, the roll crown shown in Fig. 6(a) is obtained, and then the fluid pressure is adjusted to make P+>h
By doing so, the roll crown can be changed as shown in FIG. 2(b).

Further, FIG. 7 shows an example in which the fluid pressures in the outer chambers 7a and 7b of the pressurizing chamber 3 of the conveying roll shown in FIG. 5 are adjusted independently. That is, as shown in the drawing, the inside of the cylinder 4 is divided into two chambers by a partition wall 23, and an introduction pipe 9e is newly inserted from the roll shaft 2b, and fluid is pressurized into the outer chambers 7a and 7b from the separate introduction pipes. With this structure, the fluid pressures in the inner chamber 6a, outer chambers 7a and 7b can be adjusted, and the fluid pressure PI in the inner chamber 6a, the fluid pressure P2 in the outer chamber 7a, and the fluid pressure P in the outer chamber 7b, For example, as shown in Figure 8,
It can be adjusted to P, >P, >p. FIG. 9 shows an installation example in which the above-mentioned conveyance roll is applied to a 180° wrapping point, and the wrapping angle may be 45'', 90'', or the like.

(Effects of the invention) This invention can be applied in place of conventional conveyor rolls, so there is no need to add new equipment.
It is possible to stably control the meandering of the strip according to various conditions. Furthermore, since the roll circumferential speed and the sheet passing speed are the same, it is possible to eliminate quality defects caused by slippage between the strip and the roll, which has been a problem with conventional rolls of this type.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a preferred example of the conveyance roll according to the present invention, FIG. 2 is an explanatory diagram showing changes in the amount of crown of the roll, and FIG. 3 is a schematic diagram showing a modification of the conveyance roll of FIG. 1. Fig. 4 is an explanatory diagram showing changes in the amount of crown of the roll, Fig. 5 is a schematic diagram showing another preferred example of a conveying roll according to the present invention, and Figs. 6(a) and (b) are illustrations of changes in the amount of crown of the roll. Fig. 7 is a schematic diagram showing a modification of the transport roll shown in Fig. 5; Fig. 8 is an explanatory diagram showing changes in the crown amount of the roll; Fig. 9 shows an example of installation of the transport roll. This is a schematic diagram. 1... Roll IFI 2a, 2b...
・Roll shaft 3...Pressure chamber 4...Cylinder 5...Partition wall 6, 7...Divided chamber 6a
...Inner room 7a, 7b...Outer room 8
...Through holes 9a to 9e...Introduction pipe 1
0...Switching unit l1...Pressure adjustment unit 12. 15...Fluid source 13...Strip plate 14...Rotary coupler l6...Pressure valve 1
7. 19...Operation unit} 1B...Pressure reducing valve 20...Pressure sensor 2l...Controller 22
... Meandering sensor 23 ... Partition wall Fig. 2 Fig. 3 Fig. 4 Fig. 1 Fig. 5 Fig. 6 ja) (b) Yu Fig. 7

Claims (1)

[Scope of Claims] 1. A roll that controls the conveyance of strips in a continuous processing line for strips, comprising a roll cylinder made of an elastic cylindrical body and a pressurizing chamber that supports the inner wall of the roll cylinder, and the pressurizing chamber This is a variable-crown conveyor roll consisting of multiple chambers partitioned by partition walls and means for adjusting the pressure of the fluid filled in each chamber. 2. A roll that controls the conveyance of strips in a continuous processing line for strips, and is equipped with a roll body made of an elastic cylindrical body and a pressurizing chamber extending annularly along the inner wall of this roll barrel, and the pressurizing chamber is formed by a diaphragm. A variable crown conveyor roll comprising an inner chamber supporting the center of the roll cylinder and an outer chamber supporting the end of the roll cylinder, which are partitioned by partition walls, and means for adjusting the pressure of fluid filled in the inner chamber and the outer chamber.