JP2945299B2 - How to replace the sink roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for replacing a sink roll.

[0002]

2. Description of the Related Art In a pre-treatment of surface treatment such as a hot-dip galvanizing treatment or a chromate treatment, and in a descaling treatment prior to a cold working, a steel sheet is introduced into a treatment bath and immersed in a bath. Is performed. In each of the above-mentioned processes, for example, the pre-treatment of the hot-dip galvanizing process, as the amount of treatment increases, the surface of the sink roll provided in the treatment bath becomes worn, and problems such as scratches at the edges of the steel plate occur. Therefore, it is necessary to periodically replace the sink roll installed in the processing bath.

[0003]

As described above, in various treatment baths, it is necessary to periodically replace the sink rolls installed in the baths. 4 hours, a total of 8 hours, which leaves a problem in terms of productivity.

[0004] The present invention advantageously solves the above-mentioned problem, and the replacement of the sink roll can be completed more quickly and easily than in the past, so that the productivity can be greatly improved.
The purpose is to propose a new sink roll replacement method.

[0005]

That is, the present invention provides:
When exchanging the sink roll installed in the processing bath, first, when removing the sink roll from the processing bath, a transport device having a skid capable of moving up and down and moving horizontally is provided in the bath after draining, The skid is mounted under the sink roll so that the horizontal movement direction of the skid is aligned with the axial direction of the sink roll, and the skid is raised to support the drive-side end of the roll body of the roll, while the operation side For the roll, the roll neck of the roll is suspended and supported outside the tank, and then, while maintaining the horizontal level, the operation side is moved until at least half of the roll drum comes out of the tank. Like the operation side end, the entire roll is guided outside the tank while being suspended and supported outside the tank, while the sink roll is recharged into the processing bath. A method of replacing the sink roll, characterized in that proceed in the reverse procedure.

Hereinafter, a procedure for replacing a sink roll according to the present invention will be described in comparison with a conventional procedure. Fig. 1 (a), (b)
Next, the installation state of the sink roll is shown by a front view and a side view using a pretreatment tank of hot-dip galvanizing as a typical example. In the figure, reference numeral 1 denotes a bathtub main body, and reference numeral 2 denotes a sink roll installed in the bathtub. 3 is a bearing, 4 is a deflector roll, 5 is an electrode, 6 is an upper inspection window, and 7 is a lower inspection window. Conventionally, when taking out the sink roll 2 from the above-mentioned bathtub, as shown in FIG. 2 (a), a wire 8 is inserted from the upper inspection window 6 and a roll neck on the driving side A of the roll 2 is hung. Lower, other operating side B
About the wire 8 attached to the trolley 9 outside the tank
After hanging the roll neck and removing the bearing 3 and the extraction hole flange 17 to secure a space for taking out the sink roll 2, as shown in FIG. 2 (b), while pressing the roll end from the drive side, The roll body and the roll neck, which have come out, are taken out of the tank while being suspended and supported by the wire 8 in sequence, and then transported to a predetermined place by, for example, the moving carriage 10 or the like. When the sink roll 2 was to be re-installed, the sink roll 2 was installed in the tank in a procedure reverse to the above procedure.

In the above-described conventional replacement method, the suspension in the tank is performed by the wire 8 hanging from the upper inspection window 6 in the upper part of the tank. And the electrode 5 are arranged, and the space for moving the wire 8 is extremely narrow and limited. Therefore, taking out the roll using the wire 8 is extremely complicated, and as a result, as described above, it takes as long as about eight hours. It took a long exchange time.

On the other hand, in the present invention, the transfer device as shown in FIG. 3 is used instead of the suspension in the bath, so that the operation of moving the roll in the bathtub becomes extremely simple, and as a result, the replacement time is reduced. This has enabled a significant reduction. In FIG. 3, reference numeral 11 is a skid, 12 is a hydraulic cylinder, 13 is a hydraulic pump, 14a and 14b are guides, 15a and 15b are guide rails, and 16a and 16b are bearing rollers.

According to the present invention, when taking out the sink roll, first, the above-mentioned transport device is moved to the lower inspection window 7.
As shown in FIG. 4 (a), the roll body end on the driving side of the sink roll 2 is supported as shown in FIG.
By moving the skid 11 up and down by the hydraulic cylinder 12, its support can be performed very easily. At this time, the upper surface of the skid 11
By providing the letter-shaped recess, the axis of the roll can always be positioned directly above the center axis of the skid, and further, there is no possibility that the roll will roll down during movement. Further, the guide rails 15a and 15b need to be installed so as to be parallel to the axial direction of the sink roll. However, if the bearing rollers 16 are used as the rollers, the rail parallelism at the time of installation is somewhat poor. Also, the skid 11 can be moved without any problem. As shown in FIG. 4 (b), after the sink roll is moved until at least half of the roll drum comes out of the tank by using the above-described transfer device, the treatment may be performed in the same procedure as the conventional method ( FIG. 4 (c)).

[0010] As described above, by using the above-described transport device as the means for transporting the sink roll in the tank, the sink roll can be guided to the outside of the tank very easily as compared with the case of suspending and supporting by a wire. As a result, the time required for replacement was 2 hours for removal and 2 hours for re-installation, a total of 4 hours, and the processing time could be reduced by half compared to the conventional case.

In the above example, regarding the operation side,
Although the case of hanging by a wire has been shown as in the conventional case, a further reduction in time can be expected by using the transfer device according to the present invention as in the case of the inside of the tank. In the above example, the transport device is used only in the bathtub, but the moving space of the roll is large,
If the guide rail of the transfer device can be extended outside the bathtub, it goes without saying that it is more advantageous to shorten the replacement time.

[0012]

EXAMPLE Using the conventional method shown in FIG. 2 and the method of the present invention shown in FIG. 4, the sink roll in the hot dip galvanizing pretreatment tank shown in FIG. 1 was replaced. As a result, in the conventional method, it took 4 hours to remove the roll and 4 hours to attach, but in the present invention, it took 2 hours to remove and 2 hours to attach.
Time and required time were reduced by half.

[0013]

As described above, according to the present invention, as a means for moving the sink roll in the tank, a transfer device having a skid capable of vertical movement and horizontal movement is utilized, so that the replacement time of the sink roll can be reduced as compared with the conventional case. As a result, the productivity can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a front view and a side view showing an installation state of a sink roll in a hot dip galvanizing pretreatment tank.

FIG. 2 is a diagram showing a procedure for replacing a sink roll according to a conventional method.

FIG. 3 is an overall view of a transfer device according to the present invention.

FIG. 4 is a diagram showing a procedure for replacing a sink roll according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub body 2 Sink roll 3 Bearing 4 Deflector roll 5 Electrode 6 Upper inspection window 7 Lower inspection window 8 Wire 9 Trolley 10 Moving trolley 11 Skid 12 Hydraulic cylinder 13 Hydraulic pump 14 Guide 15 Guide rail 16 Bearing roller 17 Pull-out hole flange

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) C23C 2/00-2/40

Claims (1)

(57) [Claims] When replacing a sink roll installed in a processing bath, first, when taking out the sink roll from the processing bath, a transfer device having a skid capable of moving up and down and moving horizontally is drained. In the bath tub, the horizontal movement direction of the skid is aligned with the axial direction of the sink roll and inserted under the sink roll, and the skid is raised to support the drive side end of the roll body of the roll. On the other hand, on the operating side, the roll neck portion of the roll is suspended and supported outside the tank, and then, while maintaining the horizontal level, moved to the operating side until at least half of the roll drum comes out of the tank, and then the skid is moved. As in the case of the operation side end, the entire roll is guided outside the tank while being suspended and supported outside the tank. At the time of charging, replacing the sink roll, characterized in that proceed in the reverse procedure.