JPH08120486A - Electrolytic treating vessel - Google Patents

Abstract

PURPOSE: To provide an electrolytic treating vessel having a sealing member which prevents the meshing of the contact parts of the sealing member into the spacing from a treating vessel body when electrodes are moved and is hardly damaged in spite of long-term use. CONSTITUTION: The sealing member 7 is a tubular hollow seal consisting of an elastic material, such as electrolyte resistant rubber or resin, and the front end 7a in contact with the electrodes 2, 3 is formed in the thick part having a semicircular shape in section. The thickness of the front end 7a is set slightly thicker than the spacing S of an opening 1c and the side walls 3a, 3a of the electrodes 2, 3. The hollow part 7b connected integrally at the front end 1c has thin sealing walls having a uniform thickness. The base end side of the sealing member 7 is fitted into an annular groove 6 and the base end surface of the sealing member 7 is fixed by adhesion, etc., to the perpendicular wall of the annular groove 6. One end of an introducing pipe 7c for pressurized air communicating to the hollow part 7b is connected to the base end of the sealing member 7 and the other end of the introducing pipe 7c is connected to the pressurized air source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic treatment tank mainly used for electrolytic treatment such as various electroplating of strips (band-shaped iron plates), and more particularly to improvement of a seal member used in the electrolytic treatment tank. Is.

[0002]

2. Description of the Related Art As a prior art of this type of electrolytic treatment tank, there is one disclosed in Japanese Patent Laid-Open No. 63-140100. As shown in FIG. 5, in this electrolytic treatment tank, openings 52, 52 corresponding to the electrodes 53 are respectively provided at the central portions of the upper and lower surfaces of a vertically symmetrical electrolytic treatment tank body 51, and electrodes ( 53 is also loaded. The upper and lower electrodes 53 are supported by a supporting device 54 such as a jack or a hydraulic cylinder so that they can approach and separate from the strip A. Further, a seal member 55 is interposed between the opening 52 and the peripheral portion of the electrode 53 to prevent the electrolytic solution B from leaking. Reference numeral 57 in the drawing denotes an electrolyte injection nozzle,
Reference numeral 58 is an energizing roll (also called a conductor roll).

By the way, the seal member 55 is shown in FIG.
As shown in (a), a tubular hollow seal for introducing pressurized air into the inside is used, and the opening 52 of the processing bath main body 51 is
In an annular groove 56 of U-shaped cross section formed on the inner peripheral wall of
The seal member 55 is fitted. Then, by introducing pressurized air from the base 59, the seal member 55 expands, and the tip end surface of the seal member 55 contacts the side wall of the electrode 53. In addition, a hollow seal member 55 having a semi-cylindrical cross section, a substantially rectangular cross section, or the like is also used, but all of them are uniform and thin inflatable seals.

[0004]

However, the electrolytic treatment tank using the seal member described in the above publication has the following disadvantages. That is, since the inflatable seal is used, the electrode 5
3 has a large sliding resistance when moved, and the seal member 5
The contact part 5 may be closely attached to the side wall of the electrode 53 and may be caught in the gap between the main body 51 and the electrode 53 as shown in FIG. 6B.
Therefore, the seal member 55 is easily damaged and has a very short life.

Trouble of pressurized air source and seal member 5
When the pressurized air in the seal member 55 escapes due to breakage of the seal member 55 and the seal member 55 contracts, a gap is created between the inner wall of the opening 52 and the peripheral edge of the electrode 53 as shown in FIG. The electrolytic solution B inside may leak out.

The present invention has been made in view of the above points, and when the electrode is moved, the contact portion of the seal member does not get caught in the gap between the main body of the processing tank and the seal is not easily damaged even when used for a long period of time. It is an object of the present invention to provide an electrolytic treatment tank provided with a member, and in addition to the above object, the invention can prevent leakage of an electrolytic solution even when pressurized air in the seal member escapes. Is intended.

[0007]

In order to achieve the above object, the electrolytic treatment tank of the present invention comprises a) an electrode and a treatment tank main body having an opening having a shape corresponding to the electrode, wherein the electrode is In an electrolytic treatment tank configured to be movable with respect to the treatment tank main body so that the gap between the strip in the treatment tank can be changed, b) an annular shape having a U-shaped cross section on the inner peripheral wall of the opening of the treatment tank main body. A groove is formed, and a hollow portion into which pressurized air can be introduced is formed in the annular groove, and the tip end portion that comes into contact with the electrode is made thick and is formed of an electrolytic solution-resistant elastic material with an arc-shaped cross section. A pressurizing seal member is fitted with a part of the tip portion protruding.

According to a second aspect of the present invention, there is provided a) an electrode and a processing bath main body having an opening having a shape corresponding to the electrode, so that the electrode can change a gap between the electrode and a strip in the processing bath. In the electrolytic treatment bath configured to be movable with respect to the treatment bath main body, c) forming an annular groove having a U-shaped cross section on the inner peripheral wall of the opening of the treatment bath main body, and applying pressure to the annular groove. A pressure-type seal member made of an elastic material resistant to an electrolytic solution, which has a hollow portion into which air can be introduced and which has a lip-shaped distal end portion that comes into contact with the electrode and is projected in a direction to receive the electrolytic solution, is provided at the distal end portion. May be projected and fitted.

According to a third aspect of the present invention, U-grooves are formed in the side walls of the processing tank body which face each other, and both ends of the shaft of the current-carrying roll are vertically movably inserted into the U-grooves. Is rotatably supported via a bearing, a U-shaped continuous U-shaped seal groove is formed on the inner surface of a U-shaped spacer integrally mounted on the inner surface of the bearing, and the seal member is sealed by the seal. It can be fitted in the groove.

[0010]

According to the electrolytic treatment tank of the present invention having the above structure, when the pressurized air is introduced into the hollow portion of the seal member, the seal member expands and the thick tip portion comes into contact with the side wall of the electrode. And seal. In this state, for example, when the electrode is moved to change the distance between the electrode and the strip, since the tip of the seal member that comes into contact with the electrode is formed in an arc shape, sliding due to the movement of the electrode The resistance is low and therefore the driving force required to move the electrodes is reduced. Further, when the electrode is moved, the tip of the seal member that comes into contact with the electrode tends to be pulled in the moving direction of the electrode, but since the tip is formed thick, it hardly deforms, and thus the main body The seal member does not get caught in the gap with the electrode.

Also according to the electrolytic treatment tank of claim 2, by introducing pressurized air into the hollow portion of the seal member,
The seal member expands and the lip-shaped tip portion contacts the side wall of the electrode to seal it. When the electrode is moved in this sealed state, only the corner of the lip-shaped tip of the seal member is pressed against the side wall of the electrode, so the sliding resistance due to the movement of the electrode is small and the electrode In addition to reducing the driving force required for movement, the lip-shaped tip is hardly deformed to the extent that it slightly bends in the direction of movement of the electrode, and the seal member may get caught in the gap between the processing tank body and the electrode. Absent.

When the pressurized air in the hollow portion of the seal member escapes and the seal member contracts due to a failure of the pressurized air source or the like, (the weight of) the electrolytic solution in the main body of the processing tank is lip-shaped. Is pressed against the side wall of the electrode, and the electrolytic solution is held in the concave portion formed by the main body portion of the seal member and the lip-shaped tip portion, and leakage from the processing tank is prevented.

In the electrolytic treatment tank according to the third aspect, the surface of the roll can be easily cleaned by pulling up the energizing roll in a state where the electrolytic solution is discharged.

[0014]

Embodiments of the electrolytic treatment tank of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a part of an electrolytic treatment tank according to this embodiment, and FIG. 2 is a sectional view showing an embodiment of a seal member used in the electrolytic treatment tank of FIG. 2) shows an expanded state, and FIG. 2B shows a contracted state.

As shown in FIG. 1, the electrolytic treatment tank main body 1 is provided with a bottom plate 1a and a top plate 1b symmetrically with a vertical center line therebetween, and the bottom plate 1a and the top plate 1b are opposed to each other. Openings 1c corresponding to the electrodes 2 and 3 are provided at the respective positions. The upper and lower electrodes 2 and 3 are supported in parallel with each other by hydraulic cylinders 4 and 5, and the electrodes 2 and 3 for the strip A are
The distance of 3 can be changed via the hydraulic cylinders 4 and 5. In this example, the electrodes 2 and 3 and the opening 1c are rectangular (square) viewed from above. In the processing tank body 1, the electrolytic solution B is stored up to near the top plate 1b. An annular groove 6 having a U-shaped cross section is formed in the inner peripheral wall of each opening 1c of the bottom plate 1a and the top plate 1b, and a seal member 7 is fitted therein.

As shown in FIG. 2, the seal member 7 is a tube-shaped hollow seal made of an elastic material such as rubber or resin resistant to electrolytic solution, for example, NBR (nitrile butadiene rubber) or SBR (styrene butadiene rubber). Electrode 2
The tip portion 7a that contacts 3 (FIG. 1) is formed in a thick portion having a semicircular cross section. In particular, NBR and SBR are suitable for use in the electrolytic solution B because they have excellent insulating properties. The thickness of the tip portion 7a is set to be slightly thicker than the gap S between the opening 1c and the side walls 2a and 3a of the electrodes 2 and 3 (FIG. 1),
The hollow portion 7b integrally connected to the tip portion 1c is provided with a thin and uniform thickness seal wall, and the tip portion 7 of the seal wall is formed.
The vicinity of the connecting portion with a is bent inward in a normal state (contracted state) as shown in FIG. The base end side of the seal member 7 is fitted into the annular groove 6, the base end surface of the seal member 7 is fixed to the vertical wall of the annular groove 6 by adhesion, and the base end of the seal member 7 is provided in the hollow portion 7b. One end of an introducing pipe 7c for communicating pressurized air is connected, and the other end of the introducing pipe 7c is connected to a pressurized air source (not shown).

In this example, as shown in FIG. 2A, the thickness of the tip portion 7a is set so that the side walls 2a and 3a of the electrodes 2 and 3 (FIG. 1) and the opening 1 are formed.
By forming the gap a little thicker (about 10 mm) from the inner peripheral wall of c, the side wall 2a is formed on the tip portion 7a of the seal member 7.
The tip portion 7a of the seal member 7 is prevented from being deformed in the moving direction when the electrodes 2 and 3 are moved in the vertical direction while the 3a is in contact. The thickness of the seal wall of the hollow portion 7b is normally 2 to 3 mm.

According to the electrolytic treatment tank provided with the seal member 7 thus formed, when the electrodes 2 and 3 are moved toward and away from the strip A by the hydraulic cylinders 4 and 5, the electrodes 2 and 3 are separated. The sliding resistance between the side walls 2a and 3a and the tip portion 7a of the seal member 7 is reduced, and the hydraulic cylinder 4 and
The driving force of 5 can be reduced. This is because the tip of the tip portion 7a is formed into an arc surface. Further, since a part of the tip end portion 7a of the seal member 7 is always inserted into the annular groove 6, it is hardly deformed when the electrodes 2 and 3 are moved, and therefore, unlike the conventional case, the electrodes 2 and 3 are not deformed. Side wall 2
The seal member 7 does not get caught in the gap between the a. 3a and the inner peripheral wall of the opening 1c.

3A and 3B are sectional views showing another embodiment of the seal member. FIG. 3A shows an expanded state and FIG. 3B shows a contracted state. The seal member 7'of this embodiment is shown in FIG.
As shown in (b), a lip-shaped portion (lip-shaped tip portion) 7d having a thickness larger than that of the hollow portion 7b 'is provided on the tip surface of the hollow portion 7b' having a rectangular cross section corresponding to the opening cross section of the annular groove 6. The main body 1 is inclined and formed integrally with the main body 1. Further, as shown in FIG. 3B, the upper half of the upper surface of the hollow portion 7b ′, the vertical surface on the proximal end side and the lower surface are bonded to the inner surface of the annular groove 6, respectively, and the pressurized air in the hollow portion 7b ′ is Even in the removed state, the electrolytic solution B in the processing tank main body 1 is filled with the lip portion 7d and the hollow portion 7b '.
The concave portion 7e formed by the portion close to the tip of the electrode is received and held to prevent leakage of the electrolytic solution B.
On the other hand, in the expanded state in which pressurized air is introduced into the hollow portion 7b ', the tip corner portion of the lip-shaped portion 7d has the side wall 2a of the electrode 2.3.
Pressed by 3a, the gap between the opening 1c and the electrodes 2 and 3 is sealed to surely prevent leakage of the electrolytic solution B in the processing bath main body 1. The thickness of the seal wall of the hollow portion 7b 'is normally 2 to 3 mm as in the above embodiment, and the thickness of the lip portion 7d is 5 mm in this example.

Even in the electrolytic treatment tank having the seal member 7'of the second embodiment formed as described above, the side walls 2a and 3a of the electrodes 2 and 3 and the lip-shaped portion are moved when the electrodes 2 and 3 are moved. 7
Because the sliding resistance between the hydraulic cylinders 4 and 5 is small.
It is possible to reduce the moving force of the electrodes 2 and 3 due to. Also electrode 2
Since the lip-shaped portion 7d is bent in the moving direction when the electrode 3 is moved, the side walls 2a and 3a of the electrode 2 and 3 and the opening 1c.
The seal member 7'does not get caught in the gap with the inner peripheral wall of the. Further, even when the pressurized air is released, the electrolytic solution B can be held by the seal member 7 ′ as described above, and therefore, even if a failure of the pressurized air source occurs, the electrolytic solution from the inside of the processing tank main body 1 can be retained. Leakage of B is prevented.

FIG. 4 shows an example in which the use position of the seal member 7 (or 7 ') is different. As shown in (a) and (c) of the figure, the energizing rolls 8 and 9 are arranged in parallel in the electrolytic solution B in the processing tank main body 1 in the vertical direction. The lower energizing roll 9 is rotatably disposed between the opposing side walls of the processing bath main body 1, and the U groove 1e is formed on the opposing side walls of the processing bath main body 1 as shown in FIG. The energizing roll 8 is placed in the U groove 1e.
Both ends of the shaft 8a are vertically movably inserted. Axis 8
Both ends of a are rotatably supported by bearings 8b, respectively, and U-shaped spacers 8c integrally mounted on the inner surface of the bearing 8b.
Seal groove 8 with a U-shaped cross section that is continuous in a U shape on the inner surface of the
d is formed, and the seal member 7 shown in the above embodiment is formed therein.
(Or 7 ') is attached. In this example, the bearings 8b at both ends of the energizing roll 8 are connected to the hydraulic cylinders 10 and 10 respectively.
The hydraulic roller 10 lifts the current-carrying roll 8 while the electrolyte B is discharged, so that the roll surface can be easily cleaned.

[0023]

As is apparent from the above description,
The electrolytic treatment tank of the present invention has the following excellent effects.

(1) In the electrolytic treatment tank of claims 1 and 2,
When the electrode is moved, the sliding resistance between the electrode and the seal member is small, and the driving force required to move the electrode is reduced.
Further, when the electrode is moved, the seal member does not get caught in the gap between the main body and the electrode, and is not easily damaged, so that it can be used for a long period of time.

(2) In the electrolytic treatment tank according to claim 2, the above
In addition to the effect of (1), there is an effect that the leakage of the electrolytic solution can be prevented even if the pressurized air in the seal member escapes due to a failure of the pressurized air source or the like.

(3) In the electrolytic treatment tank of the third aspect, the surface of the roll can be easily cleaned by pulling up the energizing roll.

[Brief description of drawings]

FIG. 1 is a sectional view showing a part of an electrolytic treatment tank according to an embodiment of the present invention.

2 is a sectional view showing an embodiment of a seal member used in the electrolytic treatment tank of FIG. 1, FIG. 2 (a) showing an expanded state, and FIG.
Represents the contracted state, respectively.

3 is a cross-sectional view showing another embodiment of the seal member, and FIG.
3A shows an expanded state, and FIG. 3B shows a contracted state.

FIG. 4 shows another example of use of the seal member 7 (or 7 ′), and FIG. 4 (a) is a plan view of an energizing roll portion,
4B is a sectional view taken along the line bb of FIG. 4A, and FIG. 4C is a front sectional view of the energizing roll portion.

FIG. 5 is a partial cross-sectional view of an electrolytic treatment tank provided with a conventional seal member.

FIG. 6 is an enlarged sectional view showing a conventional seal member and its periphery (a part of an electrolytic treatment tank), FIG. 6 (a) shows an expanded state of the seal member, and FIG. 6 (b) shows an electrode. 6C shows the moving state, and FIG. 6C shows the contracted state of the seal member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrolysis treatment tank main body 1c Opening 2/3 Electrode 4/5 Hydraulic cylinder 6 Annular groove 7/7 'Sealing member 7a Tip part 7b Hollow part 7d Lip-shaped part 8 Energizing roll 8b Bearing 8c Spacer 8d Seal groove A strip B Electrolyte

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Soichiro Ueda Inventor Soichiro Ueda 9-30 Wakamatsucho, Nagata-ku, Kobe-shi, Hyogo Inside Rokuryo Rubber Co., Ltd. (72) Hideki Nakamura Wakamatsu-cho, Nagata-ku, Kobe-shi, Hyogo 9-1-30 Rokuryo Rubber Co., Ltd.

Claims (3)

[Claims] 1. An electrode and a processing bath main body provided with an opening having a shape corresponding to the electrode, and the electrode is moved with respect to the processing bath main body so that a gap between the electrode and a strip in the processing bath can be changed. In an electrolytic treatment tank configured to be possible, an annular groove having a U-shaped cross section is formed on the inner peripheral wall of the opening of the processing tank body, and in the annular groove, there is a hollow portion into which pressurized air can be introduced, and It is characterized in that a pressure-type sealing member made of an electrolyte-resistant elastic material having a thickened tip portion in contact with the electrode and having an arc-shaped cross section is fitted with a part of the tip portion protruding. Electrolytic treatment tank. 2. An electrode and a processing bath main body provided with an opening having a shape corresponding to the electrode, and the electrode is moved with respect to the processing bath main body so that a gap between the electrode and a strip in the processing bath can be changed. In an electrolytic treatment tank configured to be possible, an annular groove having a U-shaped cross section is formed on the inner peripheral wall of the opening of the processing tank body, and in the annular groove, there is a hollow portion into which pressurized air can be introduced, and A pressurizing seal member made of an elastic material having electrolytic solution resistance, which is formed in a lip shape at a tip end contacting with the electrode and which is projected in a direction for receiving an electrolytic solution, is fitted with the tip end protruding. Electrolytic treatment tank. 3. U-grooves are formed in opposite side walls of the main body of the processing tank, and both ends of the shaft of the energizing roll are vertically movably inserted into the U-grooves, and both ends of the shaft are rotated through bearings. The seal member having a U-shaped cross section continuous in a U shape is formed on the inner surface of a U-shaped spacer that is movably supported and integrally mounted on the inner surface side of the bearing, and the seal member according to claim 1 or 2 is formed. The electrolytic treatment tank according to claim 1, which is fitted in the seal groove.