JP2021116452A - Seal box and method for manufacturing plating metal plate using the same - Google Patents

Abstract

To provide a seal box capable of reducing the open time of a work opening even when an operator draws dross by himself/herself and preventing the yield of a plating metal plate from being reduced, and a method for manufacturing a plating metal plate using the same.SOLUTION: A seal box 1 surrounding the periphery of a metal strip 3 pulled from a molten metal bath 2 comprises: a main body 10 including a work opening 10a for drawing dross from the molten metal bath 2; an opening/closing member 11 for opening and closing the work opening 10a; a drive unit 12 for moving the opening/closing member 11; and an input device 13 for inputting a signal 13a into the drive unit 12. An opening signal is included in the signal 13a, and the drive unit 12 moves the opening/closing member 11 to a predetermined position so as to open the work opening 10a when detecting the opening signal from the input device 13.SELECTED DRAWING: Figure 1

Description

The present invention relates to a seal box surrounding a metal band pulled up from a molten metal tank and a method for manufacturing a plated metal plate using the seal box.

In the continuous hot-dip plating line, for the purpose of improving the appearance skin, the metal band pulled up from the hot-dip metal tank is surrounded by a seal box to isolate the internal atmosphere of the seal box from the external atmosphere.

Examples of this type of seal box that have been conventionally used include the configurations shown in Patent Document 1 and the like below. That is, in the conventional configuration, a work port is provided in the main body of the seal box, and the dross can be pumped from the molten metal tank through this work port. Normally, the work opening is closed by an opening / closing member for ensuring airtightness. The work of pumping the dross is performed after the opening / closing member is moved by the operator's manual work such as hoisting by a manual winch mechanism to completely open the work opening.

Japanese Unexamined Patent Publication No. 2012-107322

The important point of the work of drawing up the dross is to shorten the opening time of the work opening as much as possible. When the work of pumping the dross is being performed, that is, when the work opening is open, outside air flows into the seal box from the work opening. The inflow of outside air causes a poor appearance of the plated metal plate. By shortening the opening time of the work opening, it is possible to suppress the occurrence of a defective appearance portion and suppress a decrease in the yield of the plated metal plate.

In the conventional seal box as described above, the opening / closing member is driven by the manual operation of the operator. When the operator performs the work of drawing the dross by himself / herself, the dross cannot be taken out while the work opening is being opened, and the opening time of the work opening becomes long. If the work of pumping the dross is performed by a plurality of operators, the opening of the work opening and the pumping of the dross can be performed at the same time, and the opening time of the work opening can be shortened. However, when a plurality of operators are engaged in the work of pumping the dross, the number of operators who can be engaged in other work is reduced, which may cause a deterioration in the quality of the plated metal plate.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to shorten the opening time of the work opening even when the operator performs the work of drawing up the dross by himself, and plating. It is an object of the present invention to provide a seal box capable of suppressing a decrease in the yield of a metal plate and a method for manufacturing a plated metal plate using the seal box.

The seal box according to the present invention is a seal box that surrounds a metal band pulled up from a molten metal tank, and opens and closes a main body having a work port for drawing dross from the molten metal tank and a work port. It includes an opening / closing member for operating, a driving device for moving the opening / closing member, and an input device for inputting a signal to the driving device. The signal includes an open signal, and the driving device is an input device. When the opening signal from is detected, the opening / closing member is moved to a predetermined position so as to open the work opening.

The plated metal plate manufacturing method according to the present invention is a plated metal plate manufacturing method for manufacturing a plated metal plate using the above-mentioned seal box, and after inputting an open signal from an input device to a drive device, it is opened and closed by the drive device. Includes starting the work of pumping dross when the member is being moved.

According to the seal box of the present invention, when the drive device detects an open signal from the input device, the opening / closing member is moved to a predetermined position so as to open the work opening. Even so, the opening time of the work opening can be shortened, and a decrease in the yield of the plated metal plate can be suppressed. Further, according to the plated metal plate manufacturing method using the seal box of the present invention, after inputting an open signal from the input device to the drive device, the work of drawing up the dross when the opening / closing member is moved by the drive device is started. Therefore, even when the operator performs the work of pumping the dross by himself / herself, the opening time of the work opening can be shortened and the decrease in the yield of the plated metal plate can be suppressed.

It is a perspective view which shows the seal box by embodiment of this invention. It is explanatory drawing which shows the operation of the drive device of FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to each embodiment, and the components can be modified and embodied without departing from the gist thereof. In addition, various inventions can be formed by appropriately combining the plurality of components disclosed in each embodiment. For example, some components may be removed from all the components shown in the embodiments. Furthermore, the components of different embodiments may be combined as appropriate.

FIG. 1 is a perspective view showing a seal box 1 according to an embodiment of the present invention. The seal box 1 shown in FIG. 1 is a box body that surrounds the metal band 3 pulled up from the molten metal tank 2. In the hot-dip metal tank 2, for example, hot-dip metal 2a for performing hot-dip metal plating such as hot-dip galvanizing or alloyed hot-dip galvanizing is stored. The molten metal 2a can be an Mg-containing alloy such as a Zn—Al—Mg alloy. The metal strip 3 can be, for example, a steel plate or the like.

After the metal band 3 is immersed in the molten metal 2a in the molten metal tank 2, the metal band 3 is pulled up from the molten metal tank 2 so that the surface of the metal band 3 is coated with the molten metal 2a. After the metal band 3 is pulled up from the molten metal tank 2, the molten metal 2a adhering to the surface of the metal band 3 is solidified to obtain a plated metal plate having a plating layer on the surface.

Although not shown, a gas nozzle for blowing the wiping gas onto the surface of the metal band 3 pulled up from the molten metal tank 2 is arranged in the seal box 1. By blowing the wiping gas onto the surface of the metal band 3, the amount of molten metal 2a adhering to the surface of the metal band 3 is adjusted. For example, by using an inert gas such as nitrogen gas as the wiping gas, the oxygen concentration in the seal box 1 can be lowered, and the molten metal 2a adhering to the surface of the metal band 3 immediately after being pulled up from the molten metal tank 2 is formed. It can prevent oxidation.

The seal box 1 of the present embodiment includes a main body 10, an opening / closing member 11, a driving device 12, and an input device 13.

The main body 10 is a box body having a work port 10a for performing a work of drawing dross from the molten metal tank 2. In FIG. 1, the work port 10a is closed by the opening / closing member 11. The side wall of the main body 10 provided with the work port 10a is referred to as a front wall 10b. The work port 10a extends from the lower end of the front wall 10b.

As is well known, dross is a product produced by passing a metal band 3 through a molten metal 2a. If the dross accumulates in the seal box 1, the dross may adhere to the surface of the metal band 3 and cause a poor appearance of the plated metal plate. Through the work port 10a, the work of pumping the dross floating on the surface of the molten metal 2a can be performed. More specifically, the floor surface 4 around the seal box 1 of the present embodiment is provided with a floor surface opening 4a provided in accordance with the work opening 10a. When the work opening 10a is open, a longitudinal instrument is inserted into the seal box 1 through the work opening 10a, and the dross in the seal box 1 is collected in the floor opening 4a and collected in the floor opening 4a. You can get the dross.

The opening / closing member 11 is a member for opening / closing the work port 10a. The opening / closing member 11 of the present embodiment is a seat member whose upper end is fixed to the front wall 10b above the work opening 10a.

The drive device 12 is a device for moving the opening / closing member 11 so as to open / close the work port 10a. The drive device 12 of the present embodiment is composed of an electric winch having a winch main body 120 and a connecting body 121. The winch main body 120 is configured so that a connecting body 121 such as a steel rope can be electrically wound and unwound. The winch main body 120 of the present embodiment is fixed to the upper portion of the front wall 10b. However, the place where the winch main body 120 is arranged is arbitrary, for example, the winch main body 120 is fixed to a structure different from the main body 10. The connecting body 121 extends from the winch main body 120 and is guided downward by being wound around a pulley 122 arranged on the side of the winch main body 120 and above the opening / closing member 11. The tip of the connecting body 121 is fixed to the lower end of the opening / closing member 11. The connecting body 121 of the present embodiment is fixed to the lower end portion of the opening / closing member 11 at both side portions in the width direction of the opening / closing member 11. When the winch body 120 winds up the connecting body 121, the lower end portion of the opening / closing member 11 is lifted and the work opening 10a is opened. On the other hand, when the winch body 120 extends the connecting body 121, the lower end portion of the opening / closing member 11 falls due to its own weight, and the work opening 10a is closed.

The input device 13 is a device for inputting the signal 13a to the drive device 12. The input device 13 inputs the signal 13a to the drive device 12 according to the operation of the operator. The signal 13a input from the input device 13 to the drive device 12 includes an open signal, a close signal, and a stop signal.

Next, FIG. 2 is an explanatory diagram showing the operation of the drive device 12 of FIG. FIG. 2A shows a state in which the work opening 10a is closed due to the opening / closing member 11 hanging down due to its own weight. FIG. 2B shows a state in which the work opening 10a is opened by lifting the lower end portion of the opening / closing member 11 by the driving device 12.

As shown in FIG. 2A, when the drive device 12 detects an open signal from the input device 13 in a state where the work port 10a is closed by the opening / closing member 11, the drive device 12 opens the work port 10a. The opening / closing member 11 is moved to a predetermined position so as to open. That is, once the operator operates the input device 13 and inputs the open signal to the drive device 12, the drive device 12 moves the opening / closing member 11 to a predetermined position without maintaining the operation of the input device 13. Although not limited, the drive device 12 can move the opening / closing member 11 until the hanging portion 11a of the opening / closing member 11 is located above the work opening 10a as shown in FIG. 2B. The amount by which the drive device 12 lifts the lower end of the opening / closing member 11 is such that the driving device 12 lifts the lower end of the opening / closing member 11 to prevent a load from being generated on the upper end of the opening / closing member 11 fixed to the front wall 10b. It can be less than or equal to the height and width of the opening / closing member 11.

When the drive device 12 detects a closing signal from the input device 13 in a state where the work port 10a is open as shown in FIG. 2B, the drive device 12 is determined to close the work port 10a. Move the opening / closing member to the position. That is, once the operator operates the input device 13 and inputs the closing signal to the drive device 12, the drive device 12 moves the opening / closing member 11 to a predetermined position without maintaining the operation of the input device 13. Although not limited, the drive device 12 can move the opening / closing member 11 by its own weight until the opening / closing member 11 completely hangs down as shown in FIG. 2A.

When the drive device 12 detects a stop signal from the input device 13 while moving the opening / closing member 11, the driving device 12 stops the movement of the opening / closing member 11 and holds the position of the opening / closing member 11.

Next, a method for manufacturing a plated metal plate for manufacturing a plated metal plate using the seal box of the present embodiment will be described. First, as shown in FIG. 1, the metal band 3 is passed through the molten metal 2a in the molten metal tank 2 in a state where the metal band 3 pulled up from the molten metal tank 2 is surrounded by the seal box 1, and the metal plating metal is plated. Manufactures boards.

During the production, the operator operates the input device 13 at the timing when the dross is accumulated in the seal box 1, and the open signal is input from the input device 13 to the drive device 12. After inputting the open signal to the drive device 12, when the opening / closing member 11 is moved by the drive device 12, the work of drawing the dross is started without waiting for the work opening 10a to be completely opened. As a result, even when the operator performs the work of pumping the dross by himself / herself, the opening time of the work port 10a can be shortened, and the decrease in the yield of the plated metal plate can be suppressed.

Further, for example, at the timing when most of the dross in the seal box 1 is collected in the floor opening 4a, the operator operates the input device 13 to input a closing signal from the input device 13 to the drive device 12. After inputting the closing signal to the driving device 12, when the opening / closing member 11 is moved by the driving device 12, the work of drawing the dross is continued without waiting for the work port 10a to be completely closed. More specifically, the dross is attracted to the floor opening 4a even while the work opening 10a is closed. As a result, the dross in the seal box 1 can be collected more reliably, and the possibility that the dross collected in the floor opening 4a returns to the seal box 1 can be reduced.

According to the seal box 1 as in the present embodiment, when the drive device 12 detects the open signal from the input device 13, the drive device 12 moves the opening / closing member 11 to a predetermined position so as to open the work port 10a, so that the dross is reduced. Even when the operator performs the pumping work by himself / herself, the opening time of the work port 10a can be shortened, and the decrease in the yield of the plated metal plate can be suppressed.

Further, when the drive device 12 detects the closing signal from the input device 13, the opening / closing member 11 is moved to a predetermined position so as to close the work port 10a, so that the dross in the seal box 1 can be collected more reliably. At the same time, the possibility that the collected dross will return to the inside of the seal box 1 can be reduced.

Similarly, according to the plated metal plate manufacturing method using the seal box 1 as in the present embodiment, after the open signal is input from the input device 13 to the drive device 12, the opening / closing member 11 is moved by the drive device 12. Since the work of pumping the dross is started while the work is being performed, the opening time of the work opening 10a can be shortened and the decrease in the yield of the plated metal plate can be suppressed even when the work of pumping the dross is performed by one person.

Further, after the closing signal is input from the input device 13 to the drive device 12, the work of drawing up the dross while the opening / closing member 11 is being moved by the drive device 12 is continued, so that the dross in the seal box 1 can be more reliably performed. It can be collected and the risk of the collected dross returning to the seal box 1 can be reduced.

In the embodiment, the opening / closing member 11 is described as a seat member, but the opening / closing member is, for example, an open door that can rotate around a shaft portion provided on the side of the work opening, or a work opening. It may be composed of other members such as a sliding door that can slide along a rail provided above or below the.

Further, in the embodiment, the drive device 12 is described as an electric winch, but the drive device may be configured by other devices such as a hydraulic winch, a pneumatic winch, or a plunger.

1 Seal box 2 Molten metal tank 2a Molten metal 3 Metal band 10 Main body 10a Work port 11 Opening and closing member 12 Drive device 13 Input device 13a Signal

Claims (4)

A seal box that surrounds a metal band pulled up from a molten metal tank.
A main body having a work port for drawing dross from the molten metal tank, and
An opening / closing member for opening / closing the work port and
A drive device for moving the opening / closing member and
The drive device is provided with an input device for inputting a signal.
The signal includes an open signal.
When the drive device detects the open signal from the input device, the drive device moves the opening / closing member to a predetermined position so as to open the work opening.
Seal box. The signal includes a closing signal and
When the driving device detects the closing signal from the input device, the driving device moves the opening / closing member to a predetermined position so as to close the work opening.
The seal box according to claim 1. A method for manufacturing a plated metal plate, which manufactures a plated metal plate using the seal box according to claim 1 or 2.
After inputting the open signal from the input device to the drive device, the operation of pumping the dross is started when the opening / closing member is moved by the drive device.
Plated metal plate manufacturing method. Further comprising continuing the work of pumping the dross when the opening / closing member is being moved by the driving device after the closing signal is input from the input device to the driving device.
The plated metal plate manufacturing method according to claim 3, wherein claim 2 is cited.

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