JP3366193B2 - Sealing equipment in surface treatment equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies a treatment liquid to the inside of a tubular portion of a work having a tubular portion such as a cylinder block of an engine to perform a surface treatment on the inner peripheral surface of the tubular portion. The present invention relates to a surface treatment apparatus, which relates to a sealing device that seals the cylindrical portion during surface treatment.

[0002]

2. Description of the Related Art Conventionally, a cylinder block is supported as a device for performing a surface treatment on an inner peripheral surface of a cylindrical portion of a work having a cylindrical portion, for example, a device for plating a cylinder bore peripheral surface of an engine cylinder block. Installed in the cylinder bore, the electrode is placed in the cylinder bore, and while the opening of the cylinder bore is closed, the plating solution is supplied into the cylinder bore to allow the plating solution to flow and the gap between the electrode and the cylinder bore peripheral surface. There is known an apparatus in which high-speed electroplating is carried out by applying a high current (see, for example, JP-A-5-22589).

In this type of apparatus, as disclosed in the above publication, the cylinder block is installed on the work support part with the head side facing downward so that the head side opening of the cylinder bore is supported. In this installation state, the plating solution is supplied with the upper opening of the cylinder bore sealed with a lid etc., but the upper side of the cylinder block in the above installation state is the crankcase. Etc. exist and have a complicated shape,
It is difficult to achieve sealing only by covering the lid from above, which may lead to overflow of the plating solution.

Therefore, for example, Japanese Patent Laid-Open No. 7-118891
As shown in the publication, a jig or the like connected to a cylinder block is provided with a radially expandable / contractible seal member and a means for expanding the seal member, and the cylinder block is mounted on a work supporting portion on the head side. With the seal member installed in the cylinder bore and the seal member inserted into the cylinder bore, the seal member is expanded to make close contact with the circumferential surface of the cylinder bore, thereby sealing the upper opening of the cylinder bore. It has been known.

[0005]

By the way, the sealing member in this type of sealing device is sufficiently smaller than the inner diameter of the tubular portion so as to be easily inserted into and removed from the tubular portion when not sealed, while the sealing member is sealed. At times, it is required to have a sufficient expansion allowance so as to ensure close contact with the inner peripheral surface of the tubular portion. Further, the reliability of the expansion / contraction operation and the shape retention in a state of being expanded and in close contact with the inner peripheral surface of the tubular portion are required for achieving the sealing function and the like. In order to further enhance the function required for such a seal member,
There was room for improvement.

In view of the above circumstances, the present invention allows the sealing member to have a sufficient expansion allowance, enhances the sealing function by satisfying the certainty of the expansion / contraction operation and the shape retention in the expanded state. Moreover, it is an object of the present invention to provide a sealing device in a surface treatment device in which a sealing member can be easily manufactured.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a processing liquid is supplied to the inside of a cylindrical portion while a workpiece having the cylindrical portion is installed on a work supporting portion, and a surface is formed on the inner peripheral surface of the cylindrical portion. A sealing device, which is provided in a surface treatment device for performing a treatment, is located inside an opening of a cylindrical portion of the workpiece at the time of surface treatment, and seals the opening. A seal member having a lower end portion capable of expanding and contracting, and a seal pressing member facing the lower end portion of the seal member and capable of moving relative to the seal member in the contact and separation directions. Has a hollow frustoconical main part formed of an elastic material and a large number of bone fragments extending in the up-down direction along the outer peripheral surface of the main part.
At the lower end of the peripheral wall of the
Parts are connected, and an annular mounting is provided between the outer peripheral edge and the peripheral wall.
A groove is formed, and in a state in which each of the bone pieces is arranged at predetermined intervals in the circumferential direction of the main portion, the lower end portion of each bone piece is fitted and fixed in the mounting groove. Is.

According to this structure, the seal member can be expanded and contracted in an umbrella shape with a sufficient expansion margin, and a large number of bone pieces are arranged along the outer peripheral surface of the main portion, so that the expansion and contraction operation can be performed. Satisfaction with certainty, shape retention in an expanded state, etc. is achieved, and the sealing function for the inner peripheral surface of the tubular portion is excellently exhibited. Moreover, since each of the bone pieces is fitted and fixed in the mounting groove formed in the main portion, a seal member in which the main portion and the bone pieces are integrated is easily produced.

In this sealing device, the seal member is attached to the seal holding member by sandwiching the upper end of the main portion from both upper and lower sides with a mounting member fastened to the seal holding member. It is preferable that a deformation restricting spacer is interposed between the seal holding member and the mounting member on the inner peripheral side of the upper end of the.

With this configuration, the seal member can be easily attached to the seal holding member, and when the upper end of the main portion of the seal member is sandwiched between the seal holding member and the attaching member, the spacer is interposed. By being mounted, the situation in which the upper end of the main portion of the seal member is excessively compressed and the seal member is deformed is prevented.

Further, a correction ring, which is formed in a ring shape from a hard material and has a radial groove that engages with each of the bone pieces, is fitted around the outer periphery of the upper end portion of the seal member. It is preferable.

With this configuration, the positional relationship between the bone fragments is properly maintained by the correction ring, and good shape retention in the expanded state is maintained.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a surface treatment apparatus to which the present invention is applied, and FIGS. 2 and 3 show an embodiment of a sealing device. In the figure, a plating apparatus is shown as a surface treatment apparatus. This plating apparatus uses a cylinder block 1 of an engine as a work, and a cylinder 1a which is a cylindrical portion.
The inner peripheral surface of the is plated with nickel or the like. The illustrated work is a cylinder block 1 of a four-cylinder engine, which has four cylinders 1a.
Has one end opening to the head-side end surface of the cylinder block 1 and the other end opening to the crankcase-side space of the cylinder block 1. Also, on the partition walls located on both sides of each cylinder opening on the crankcase side,
An edge portion 1b protruding inward is formed.

The cylinder block 1 is carried by a work carrying means (not shown), and is sent to a plating apparatus through pretreatment by various pretreatment apparatuses. Then, in the plating apparatus, the cylinder block 1 is installed on the plating apparatus main body (processing apparatus main body) 2, and the cylinder block 1 is fixed by the auxiliary device 20 for mounting the seal and fixing the work. In the sealed state, the inner peripheral surface of the cylinder 1a is electroplated, and in particular, high speed plating is performed by flowing a high current while flowing a plating solution. The specific structure of the plating apparatus is as follows.

A work supporting portion 3 is provided on a base 4 of the plating apparatus main body 2, and the work supporting portion 3 has the cylinder block 1 with its head side facing downward (when mounted on a vehicle. The head side opening of each cylinder 1a is closed by the work supporting portion 13 as compared with the cylinder 1a.

In the work supporting portion 3, a passage 5 for flowing a plating solution which extends in the lateral direction (the same direction as the cylinder row direction) is formed, and the passage 5 communicates with the upper surface of the work supporting portion 3. An opening 6 to be opened is formed, and a seal portion (not shown) is provided around the opening 6,
In the state where the cylinder block 1 is supported by the work supporting portion 3 as described above, the lower opening portion (head side opening portion) of each cylinder 1a and the opening portion 6 are aligned, and the peripheral portion thereof is sealed. It has become.

Further, the plating apparatus main body 2 is provided with electrodes 7 also functioning as flow path forming members at positions corresponding to the cylinders 1a of the cylinder block 1. This electrode 7 is
It has an inner cylinder part 8 made of a metal pipe and an outer cylinder part 9 made of a porous metal plate or the like, and a pellet storage part 10 is formed between the inner and outer cylinder parts 8 and 9, and the pellet storage part 10 is plated. A large number of pellets 11 made of nickel as a material are stored. A cover 8a made of a porous metal plate or the like is attached to the upper end of the inner cylindrical portion 8.

The electrode 7 is connected to a holder 12 attached to the base 4, penetrates through the passage 5, and protrudes upward from the opening 6. When the cylinder block 1 is installed on the work supporting part 3, the electrode 7
Rushes into each cylinder 1a of the cylinder block 1 from the head side, the upper end of the electrode 7 reaches the vicinity of the upper opening of the cylinder 1a, and is fixed between the outer peripheral surface of the electrode 7 and the inner peripheral surface of the cylinder 1a. A gap is maintained. As a result, in each cylinder 1a of the cylinder block 1, the flow paths 14 and 15 that communicate with each other at the upper portion are formed inside the inner cylindrical portion 8 of the electrode 7 and outside the outer cylindrical portion 9 of the electrode 7, and the outer flow The passage 15 communicates with the passage 5.

Further, the holder 12 and the work supporting portion 3
A passage 16 for introducing a plating solution is formed over the passage, and a passage 14 inside the inner cylindrical portion 8 of the electrode 7 communicates with this passage 16. A plating solution introducing pipe 17 communicating with the passage 16 is connected to a lower portion of the base 4.

Although not shown in the drawing, a plating solution supply / discharge system for the plating apparatus main body 2 is supplied from the plating solution storage tank to a passage 16 from the plating solution introduction pipe 17 through a pump, a plating solution supply pipe, and the like. After being sent in and passing through the flow paths 14 and 15, it is collected from the passage 5 into the plating solution storage tank via the plating solution recovery pipe. Although not shown in the drawing, the electric system also includes the electrode 7
Is connected to the plus side of the power circuit, while the cylinder block 1 is connected to the minus side of the power circuit, a voltage is applied between the electrode 7 and the cylinder block 1.

Further, the auxiliary device 20 is provided with a frame (not shown) which is movable between a predetermined operating position above the plating device main body 2 and a retracted position which does not interfere with the loading and unloading of the work. Along with this, the movable plate 21 is attached to the frame so that it can be moved up and down.
And a cylinder 22 that drives this movable plate 21,
A lower plate 24 connected below the movable plate 21 via a connecting rod 23 is provided. The cylinder block 1 installed on the work supporting portion 3 of the plating apparatus body 2 can be pressed and fixed from above.

In this embodiment, the auxiliary device 20 is equipped with a sealing device 30. The sealing device 30 includes a seal member 31 whose upper end is attached to a seal holding member 35 and whose lower end side can be expanded and contracted, and a seal pressing member 37 for expanding and expanding the seal member 31.

The seal holding member 35 is formed in a columnar shape, and its upper end is attached to the lower plate 24 of the auxiliary device 20, and a screw hole 35a is formed in the lower portion of the seal holding member 35. And this screw hole 3
A mounting member 36 having a screw shaft 36a corresponding to 5a and a plate-shaped portion 36b is fastened to the seal holding member 35, and a seal member is provided between the lower end of the seal holding member 35 and the plate-shaped portion 36b of the mounting member 36. The upper end of 31 is clamped. A through hole is formed in the central portions of the seal holding member 35 and the mounting member 36.

Further, the seal pressing member 37 is formed in a substantially disc shape having an annular protruding portion 37a on the upper surface of the peripheral portion, is located below the sealing member 31, and the protruding portion 37a faces the lower end of the sealing member 31. is doing. The lower end of a rod 38 is connected to the central portion of the seal pressing member 37.
Extends upward through the through holes of the attachment member 36 and the seal holding member 35, and the upper end portion thereof is connected to an air cylinder 39 for seal operation attached to the movable plate 21 of the auxiliary device 20.

Below the seal pressing member 37, a plate 40 for closing the pellet accommodating portion 10 of the electrode 7 is attached.

4 to 6 specifically show the structure of the seal member 31. As shown in these figures, the seal member 31 includes a hollow truncated cone-shaped main portion 32 made of an elastic material such as rubber, and a large number of bone pieces 33 arranged on the outer peripheral surface side of the main portion 32. It consists of and.

At the upper end of the peripheral wall 32a of the main portion 32, a disc-shaped portion 32b having a through hole 32c at the center is formed continuously, and the screw shaft 36a of the mounting member 36 is provided inside the through hole 32c. The disk-shaped portion 32b with the
Are sandwiched between the seal holding member 35 and the mounting member 36. A spacer 41 for restricting deformation is fitted in the through hole 32c. This spacer 41
When the mounting member 36 is fastened to the seal holding member 35 and the disc-shaped portion 32b is sandwiched between them,
The compression of the disk-shaped portion 32b is regulated by interposing the seal holding member 35 and the mounting member 36 to regulate the distance between them.

At the lower end of the peripheral wall 32a, an outer peripheral edge portion 32d bent outwardly is formed continuously, and an annular mounting groove 32e is provided between the outer peripheral edge portion 32d and the peripheral wall 32a.
Are formed. Further, each of the bone pieces 33 is formed of a hard material such as metal into a rod shape, extends in the generatrix direction along the peripheral wall 32a of the main portion 32, and is arranged at predetermined intervals in the circumferential direction, and the lower end portion thereof is the above-mentioned. It is fitted and fixed in the mounting groove 32e.

The seal member 31 having such a structure expands and contracts according to the operation of the seal pressing member 37 with respect to the seal member 31 in the contacting and separating direction as described later, and seals the inner peripheral surface of the cylinder 1a during expansion. The function is exhibited well, and the manufacturing and the mounting can be easily performed.

That is, when the seal member 31 is manufactured,
The main portion 32 is integrally molded into the predetermined shape as described above, and each bone piece 33 is fitted into the mounting groove 32e formed in the lower portion of the seal member 31 and fixed to the main portion 32, thereby adhering to each other. The seal member 31 in which the main portion 32 and the bone piece 33 are integrated is easily manufactured without the need. Further, when the seal member 31 is attached to the seal holding member 35, the attachment member 36 is fastened to the seal holding member 35 with the disc-shaped portion 32b of the seal member 31 sandwiched between them. The seal member 31 is easily attached. In this case, if the spacer 41 for deformation regulation is interposed between the seal holding member 35 and the mounting member 36, the disc-shaped portion 32b of the seal member 31 is over-compressed, and the seal member 31 is accordingly removed. It prevents the situation of being constantly deformed.

A correction ring 42 is fitted on the outer periphery of the upper portion of the seal member 31. As shown in FIG. 7, the correction ring 42 is formed of a hard material such as metal in an annular shape, and grooves 42a that engage with the bone pieces 33 are radially arranged on the inner peripheral surface of the correction ring 42.
Reference numeral 43 denotes a spring mounted on the seal holding member 35, and the correction ring 42 is urged downward by the spring 43 via the cylindrical body 44, so that the seal member 31 is normally in a predetermined reduced diameter state. It is designed to be kept at.

According to the sealing device having the above structure,
In the plating process, first, the cylinder block 1 is installed on the work supporting portion 3 of the plating apparatus main body 2 with the head side facing downward, and the auxiliary device 20 is located above the cylinder block 1 in a predetermined operating position. In this state, the movable plate 21 and the lower plate 24 are lowered by driving the cylinder 22, so that the seal holding member 3
5, the seal member 31, the seal pressing member 37, and the like descend and project into the cylinder 1a, and the seal member 31 is positioned near the upper opening of the cylinder 1a in a reduced diameter state (see FIG. 2).

In this state, by driving the air cylinder 39 for sealing operation, the seal pressing member 37 is pulled up via the rod 38, and the seal pressing member 3 is pulled up.
The projecting portion 37a of the peripheral portion of 7 abuts against the lower end of the seal member 31 and presses it. Since the seal member 31 can be expanded and contracted on the lower end side like an umbrella with a sufficient expansion margin, it is expanded radially outward as it is pressed from below by the seal pressing member 37, and the outer periphery of the lower end is expanded. The portion comes into close contact with the inner peripheral surface of the cylinder 1a to seal the upper opening of the cylinder 1a (see FIG. 3).

In this case, since the seal member 31 is composed of the main portion 32 made of an elastic material and the many bone pieces 33, when it is pressed by the seal pressing member 37, it is crushed irregularly. No deformation will occur. Further, a correction ring 42 having a groove 42a that engages with each bone piece 33 is externally fitted on the upper portion of the seal member 31, and the correction ring 42 is
Since each bone piece 33 is kept at a constant interval on the upper side of the seal member 31, the interval between the bone pieces 33 is prevented from changing unevenly when the seal member 31 is expanded, and the entire circumference is made uniform. To be extended.

Therefore, the reliability of the expansion / contraction operation and the shape retention in the expanded state are secured, and the upper opening of the cylinder 1a can be well sealed.

After the sealing is thus performed by the sealing device, the plating solution is supplied into the cylinder 1a,
High-speed plating is performed with the plating solution flowing between the electrode 7 and the inner peripheral surface of the cylinder 1a. At this time, since the sealing is performed well as described above, the overflow of the plating solution is reliably prevented. In addition, since the pellet storage portion 10 of the electrode 7 is closed by the plate 40 provided below the seal member 31, the pellet 11 in the pellet storage portion 10 is covered with the flow paths 14, 1 during plating.
It is prevented to jump out to 5.

After the plating process is completed, the supply of the plating solution is stopped, and then the sealing device 30 is returned from the sealed state shown in FIG. 3 to the non-sealed state shown in FIG. The seal holding member 35, the seal member 31, the seal pressing member 37, etc. are pulled out upward from the cylinder 1a, and the auxiliary device 20 is moved to the retracted position, and then the cylinder block 1 is carried out.

The specific structure of the sealing device of the present invention and the surface treatment device having the same is not limited to the above-described embodiment, but various modifications can be made.

For example, in the above embodiment, the auxiliary device 20 is equipped with the seal device 30, but the seal holding member 3 is used.
5, the seal unit having the seal member 31, the seal pressing member 37 and the like is held on the upper end portion of the electrode 7, and the rod connected to the seal pressing member 37 is projected upward to operate the rod from the outside. You may get it. Alternatively, cylinder block 1 (workpiece)
You may make it provide the sealing device in the jig mounted | worn with.

Further, in each of the above-mentioned embodiments, the structure of the present invention is applied to a plating apparatus, but it may be applied to a pretreatment apparatus for performing various pretreatments for plating, and to a pretreatment apparatus which does not require an electrode. When applied, a simple tubular flow path constituent member may be provided so as to project from the work supporting portion instead of the electrode.

[0041]

According to the seal device of the present invention, the seal holding member has the upper end portion attached to the seal holding member, and the lower end side thereof can be expanded and contracted. And a seal pressing member that is relatively movable to each other, the seal member having a hollow truncated cone-shaped main portion formed of an elastic material and a large number of bone fragments along the outer peripheral surface of the main portion. Therefore, the seal member can be brought into close contact with the inner peripheral surface of the cylindrical portion of the workpiece to seal the opening, and in particular, the reliability of the expansion / contraction operation of the seal member and the shape retention in the expanded state can be ensured. It is possible to secure and improve the sealing function. Moreover, since each of the bone pieces is fitted and fixed in the mounting groove formed in the main portion, the seal member can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a sectional view showing an entire plating apparatus provided with a sealing device according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a state of the sealing device before sealing.

FIG. 3 is an enlarged cross-sectional view showing a sealed state of the sealing device.

FIG. 4 is a plan view of a seal member in the seal device.

FIG. 5 is a sectional view of the seal member.

FIG. 6 is an enlarged cross-sectional view of a main part in a state where the seal member is attached to a seal holding member.

FIG. 7 is a plan view of a straightening ring.

[Explanation of symbols]

1 cylinder block 1a Cylinder (cylindrical part) 2 Plating equipment body 3 Work support 7 electrodes 30 sealing device 31 Seal member 32 Main part of seal member 33 bone fragments 35 Seal holding member 36 Mounting member 37 Seal holding member 41 Spacer 42 Straightening ring

Continuation of front page (56) References JP-A-8-199390 (JP, A) JP-A-8-92789 (JP, A) JP-A-8-209384 (JP, A) JP-A-8-144082 (JP , A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C25D 7/04 C25D 7/00

Claims (3)

(57) [Claims] 1. A surface treatment apparatus for supplying a treatment liquid to the inside of the cylindrical portion to perform a surface treatment on the inner peripheral surface of the cylindrical portion in a state where a workpiece having the cylindrical portion is installed on a work supporting portion. The sealing device is located inside the opening of the cylindrical portion of the work and seals the opening during the surface treatment.The seal holding member has the upper end attached and the lower end expands and contracts. The seal member includes a seal member that is made possible and a seal pressing member that faces the lower end portion of the seal member and that can move relative to the seal member in the contact and separation directions. The seal member is made of an elastic material. It has a hollow truncated cone-shaped main portion and a large number of bone fragments extending in the vertical direction along the outer peripheral surface of the main portion, and is folded back at the lower end of the peripheral wall of the main portion.
The outer peripheral edge that is bent outward in a sine-like shape is formed continuously, and the outer peripheral edge is formed.
An annular mounting groove is formed between the portion and the peripheral wall, in a state in which the bone fragments are arranged at predetermined intervals in the circumferential direction of the main portion,
A sealing device in a surface treatment device, wherein a lower end portion of each bone piece is fitted and fixed in the mounting groove. 2. The seal member is attached to the seal holding member by sandwiching the upper end of the main part from the upper and lower sides of the seal holding member and a mounting member fastened thereto, and the upper end of the seal member. The sealing device in the surface treatment apparatus according to claim 1, wherein a spacer for restricting deformation is interposed between the seal holding member and the mounting member on the inner peripheral side of the part. 3. A correction ring, which is annularly formed of a hard material and has a groove for engaging each of the bone pieces, is externally fitted to the outer periphery of the seal member in the vicinity of the upper end of the seal member. The sealing device in the surface treatment device according to claim 1 or 2.