JPH0626382Y2 - Liquid wiping device with gas - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an apparatus for wiping a liquid attached to a strip with a gas even if the strip width changes during wiping.

(Prior Art) Generally, a squeeze roll made of rubber is used to remove the treatment liquid adhering to the strip after the strip has been degreased, pickled, and treated in a metal strip treatment line. Is. However, if the rubber squeeze roll is used for a certain period of time, the surface will deteriorate due to corrosion by the treatment liquid and friction with the strip.
It needs to be replaced on a regular basis and is expensive. For this reason, in recent years, in some cases, the treatment liquid adhering to the strip is wiped with a gas.

As a conventional method for this, as shown in FIG. 3, the strip 3 is raised by the deflector rolls 4 and 4a on the outlet side of the processing tank 2 containing the processing liquid 1,
This is a method in which a pair of nozzles 6 and 6a each having a slit-shaped ejection port 5 are arranged on both sides of the rising portion, and air is ejected to the strip 3 to wipe the treatment liquid adhering to the strip 3.

When the treatment liquid is wiped by this method, if the air jetted from the jet port 5 is uniform in the entire width direction, the treatment liquid flows in the edge direction of the strip 3 and the treatment liquid at the edge portion cannot be sufficiently wiped. Problems such as taking out the liquid and coloring occur. For this reason, as shown in FIG. 4, the ejection port 5 has a wide gap on both end sides corresponding to the edge portion of the strip 3 to lengthen the wiping time.

(Problems to be solved by the invention) By the way, when a strip is treated with a solution on a strip treatment line, strips of various widths are continuously passed through, but the nozzles have the above-mentioned both end sides as described above. If there is only one pair of ejection openings each having a wide gap, the treatment liquid at the edge portion cannot be sufficiently wiped when the width of the strip changes.

The present invention provides a liquid wiping device using a gas, which solves the problem of the relationship between the change in strip width and defective wiping of the edge portion.

(Means for Solving the Problems) In the present invention, a plurality of jet nozzles having different shapes are formed in a pair of nozzles that are arranged to face each other, and the nozzles are covered with a cover so that only the jet nozzles on the facing surface are exposed. The injection port used can be switched by rotating the nozzle.

That is, the present invention provides a wiping device in which a plurality of slit-shaped gas injection ports having wide gaps on both end sides and different distances between the wide gap portions are formed at intervals in the circumferential direction. The two hollow rolls facing each other in parallel,
In addition to rotatably supporting the hollow shaft, an inner cylindrical cover that is in close contact with the hollow roll is placed on the outer periphery of each hollow roll, and only one injection port of the hollow roll is exposed on the facing surface side of each cover. It is configured by providing a releasing portion that allows the release.

(Operation) In this wiping device, since the hollow roll is rotatably supported by the hollow shaft, when the hollow roll is rotated,
Any of the injection holes formed in the hollow roll can be opposed. In addition, the cover of the hollow roll is in close contact with the hollow roll except for the facing surface, and only the facing surface serves as the opening portion.Therefore, if gas is supplied from the hollow shaft, the gas is jetted only from the jet port located in the opening portion. To be done.

Therefore, the hollow rolls are arranged so as to be on both sides of the strip raised from the outlet side of the processing tank as in the conventional case,
When the strip width changes, it is possible to switch to the injection port corresponding to the strip width by rotating the hollow roll.

(Embodiment) FIG. 1 is a cross-sectional view of a wiping device of the present invention.
The figure shows a front view of the left side portion of FIG. 1 as viewed from the strip 3 side. The strip 3 is raised by two deflector rolls 4 and 4a having different heights arranged on the outlet side of the processing bath 2 containing the processing liquid 1 as in the conventional case. Hollow rolls 7 and 7a are arranged on both sides of the rising portion of the strip 3, and they are mounted on frames 9 and 9a by rotating shafts 8 and 8a. The hollow rolls 7 and 7a are provided with slit-shaped injection ports 5 having wide gaps on both end sides, and four wide portions on both end sides having different lateral distances are formed at intervals of 90 degrees in the circumferential direction. Has been done.

The rotating shafts 8 and 8a have a muck portion on the frame 9a side, and a gear 10 is fixed to a portion on the frame 9a side outside the frame 9a. The gear 10 engages with the gear 10a of the motor 11. Have been combined. On the other hand, the rotary shaft 8,
A portion of 8a on the frame 9a side is hollow, and a rotary joint 12 is fitted to a portion of the frame 9 on the frame 9 side outside the frame 9 so that compressed air is supplied from there.

Endless belts 13 and 13a having a width wider than the longest injection port 5 formed in the hollow rolls 7 and 7a are arranged on the side opposite to the facing surfaces of the hollow rolls 7 and 7a, and inside of the respective endless belts 13 and 13a. The winding rolls 14 and 14a are inserted in. These winding rolls 14 and 14a are arranged above and below the hollow rolls 7 and 7a, respectively.
The hollow rolls 7 and 7a are rotatably mounted on the strip 3 side of the center plane parallel to the strips 3 of the hollow rolls 7 and 7a and are in close contact with the hollow rolls 7 and 7a.
On the opposite side of the hollow rolls 7 and 7a from the strip 3, tension rolls 15 and 15a are attached to the endless belts 13 and 13a.
Is placed inside and applies tension to the endless belts 13 and 13a. Due to this tension, in the case of the hollow roll 7, the endless belt 13 existing between the two winding rolls 14 passes from the position of the winding roll 14 on the upper side to the lower side of the hollow roll 7 via the side opposite to the strip 3. Winding roll 1
It is wound up to position 4. Therefore, the endless belt 13 is in close contact with the hollow roll 7 and seals the four injection ports 5 other than those directed to the strip 3. Similarly, in the case of the hollow roll 7a, if the endless belt 13a existing between the two winding rolls 14a is one of the four injection ports 5 of the hollow roll 7a other than the one that faces the strip 3. Seal tightly.

Although FIG. 2 shows only the portion on the left side of the strip 3 in FIG. 1, the portion on the right side is also symmetrical about the strip 3.

In this wiping device, when the motor 11 is operated, the hollow rolls 7 and 7a are rotated by the gear 10,
Any of the different injection ports 5 formed in the hollow rolls 7 and 7a can be moved to the facing surface side of the hollow rolls 7 and 7a. When the hollow rolls 7 and 7a rotate, the endless belts 13 and 13a also rotate. Also, the hollow rolls 7, 7
The injection port 5 which is not located on the opposite surface side of a is the endless belt 1
The gas supplied from the rotary joint 12 is jetted only from the facing jet port 5 because it is hermetically sealed with the nozzles 3 and 13a.

Therefore, the type of the ejection port 5 can be changed according to the width change of the strip 3.

(Effect of the Invention) As described above, in the wiping device of the present invention, two hollow rolls each having a plurality of different injection holes formed in the circumferential direction are opposed to each other, and only the opposed surface side injection ports of each hollow roll are arranged. Since the inner cylindrical cover having a release part that can be released is adhered to the hollow roll, the strip width can be easily changed in the continuous strip processing line even if the strip width changes during the treatment with the solution. It is possible to switch to the injection port corresponding to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 show an embodiment of a wiping device according to the present invention. FIG. 1 is a cross-sectional view of the wiping device, and FIG. It is the one side front view which looked at the left side part of the figure from the strip 3 side. 3 and 4 show a conventional wiping device. FIG. 3 is a cross-sectional view and FIG. 4 is a front view on one side as seen from the strip 3 side. 1 ... Treatment liquid, 2 ... Treatment tank, 3 ... Strip, 4, 4a ...
Deflector roll, 5 ... Injection port, 6, 6a ... Nozzle,
7, 7a ... Hollow roll, 8, 8a ... Rotating shaft, 9, 9a ...
Frame 10, 10a ... Gear, 11 ... Motor, 12
… Rotary joints, 13, 13a… Endless belts,
14, 14a ... Winding roll, 15, 15a ... Tension roll,

Claims (1)

[Scope of utility model registration request] 1. A hollow roll having a plurality of slit-shaped gas injection ports having wide gaps on both end sides and having different distances between the wide gaps formed at intervals in the circumferential direction. While facing each other in parallel and rotatably supported by a hollow shaft, an inner cylindrical cover that is in close contact with the hollow roll is arranged on the outer periphery of each hollow roll, and one hollow roll is provided on the facing surface side of each cover. A wiping device for a liquid by a gas, which is provided with a release part that exposes only the injection port of.