JPH07138795A - Surface treating device - Google Patents

Abstract

PURPOSE:To provide the surface treating device which is capable of forming plating layers of uniform thin films on the surfaces of long-sized and thin metallic pipes and has high productivity and decreased troubles. CONSTITUTION:Plural work holders 2 which hold and immerse the works 10 into the treating liquids of treating liquid tanks 1 and move the works so as to circulate the works successively in synchronization between the plural treating liquid tanks 1 by moving devices 3 are disposed. Chucking parts 21, 22 which are in common use as electrodes for holding the long-sized works 10 in a horizontally laid down state, driving transmission section 24 for rotationally driving the chucking parts housed in a sealing box 26 and sliding contact parts 25 electrically connected to the chucking parts are disposed at these work holders 2. The works 10 are immersed and held in the treating liquids in the treating liquid tanks 1 and while the chucking parts 21, 22 are rotated in this state via the driving power transmission parts 24 by the rotational driving devices 4 for the chucking parts, the works 10 are surface treated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment device used for electrolytic degreasing treatment, plating treatment, etc., and particularly to a surface of a long thin metal pipe such as a heat collecting pipe used for a solar water heater. The present invention relates to a surface treatment apparatus suitable for forming a thin thin film plating layer.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for surface-treating a long tubular or rod-shaped object to be treated, electrolytic degreasing treatment and plating are carried out in a state where a large number of long objects to be treated are lined up vertically in a vertically hanging apparatus. 2. Description of the Related Art A surface treatment apparatus is used in which a treatment liquid is sequentially transferred to a treatment liquid tank and a required treatment is performed. In the case of this device, it is necessary to hold the object to be processed at a predetermined distance from the electrode member serving as the anode disposed in the processing solution in the processing solution tank, and to configure each material to be processed as the cathode. The surface treatment is performed. By the way, in the case of the above-mentioned conventional apparatus, since the depth of the treatment liquid tank and the vertical suspension device must be equal to or longer than the length of the object to be treated, when the object to be treated is long, the surface treatment apparatus itself is In addition to being a large size, it can be used for lifting and lowering the workpieces and attaching / detaching the workpieces to / from the vertical suspension device when the workpieces are sequentially transferred to multiple processing liquid tanks by the vertical suspension device for surface treatment. There is a problem in that it takes time and productivity is reduced. In addition, when the object to be processed is hung vertically in the processing liquid, the greater the depth of water, the greater the pressure applied to the surface of the object to be processed. Objects may be deformed. In addition, the distance between the electrode member and the object to be processed differs depending on the position of the surface of the object to be processed, and is easily affected by the gas generated during the plating process, which is long and thin such as a heat collecting tube used in a solar water heater. It was difficult to form a uniform thin film plating layer on the surface of the metal tube.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the conventional surface treatment apparatus described above, and a uniform thin film is formed on the surface of a long and thin metal tube such as a heat collecting tube used in a solar water heater. It is possible to form a plating layer and high productivity,
It is an object of the present invention to provide a surface treatment device with few failures.

[0004]

In order to achieve the above object, the first aspect of the present invention comprises a plurality of processing liquid tanks arranged in series,
A plurality of workpiece holders for holding the workpiece and immersing the workpiece in the treatment liquid of the treatment liquid tank, and moving so as to sequentially circulate between the plurality of treatment liquid tanks; In a surface treatment apparatus comprising a moving device for moving the object holder so as to circulate in synchronization in order between the processing liquid tanks,
The workpiece holder is a chuck portion that also serves as an electrode for holding a long workpiece in a recumbent state, a driving force transmitting portion that rotationally drives the chuck portion, the driving force transmitting portion and the chuck portion. The gist of the present invention is to include a sliding contact portion electrically connected to the sealing box for accommodating the driving force transmitting portion and the sliding contact portion from the processing liquid.

A second aspect of the present invention is characterized in that, in the surface treatment apparatus according to the first aspect of the present invention, treatment liquid tanks for performing the surface treatment with the same treatment liquid are arranged adjacent to each other.

Further, in the third aspect of the present invention, in the surface treatment apparatus according to the first or second aspect of the present invention, the surface of the rotating shaft that connects the chuck portion and the driving force transmitting portion that rotationally drives the chuck portion is made of a resin material. The point is to cover it.

The fourth aspect of the present invention is the surface treatment apparatus according to the first, second or third aspect of the present invention, wherein an annular electrode having a radial cut is provided on the inner periphery of the chuck portion which is easily deformed by an external force. The main point is the establishment.

[0008]

According to the surface treatment apparatus of the present invention, the plurality of treatment object holders holding the treatment object are sequentially circulated in synchronization between a plurality of treatment liquid tanks arranged in series by a moving device. While moving as shown in the table, the moving device lowers the object-to-be-processed holder at the position of each processing solution tank, immerses the held object to be processed in the processing solution in the processing solution tank, and performs the required surface treatment. When the surface treatment in the treatment liquid tank is completed, the object to be treated holder is moved up by the moving device to move the object to be treated holder to the treatment liquid tank in the next step. At this time, while holding the workpiece in a recumbent state by the chuck portion that also serves as the electrode (cathode) of the workpiece holder, the chuck portion rotation drive device rotates the chuck portion through the driving force transmitting portion. Thus, it is possible to eliminate unevenness in the treatment caused by the gap between the electrode member and the object to be treated depending on the position of the surface of the object to be treated, and to form a uniform thin film plating layer on the surface. In addition, the drive force transmission part that rotationally drives the chuck part and the sliding contact part electrically connected to the chuck part are housed in the seal box, and the drive force transmission part and the sliding contact part are isolated from the processing liquid and the surface is isolated. The treatment prevents the plating metal from depositing on the surfaces of the driving force transmitting portion and the sliding contact portion.

Further, since the time required for the surface treatment of the object to be treated is largely different in the respective treatment liquid tanks, the treatment liquid tanks for performing the surface treatment with the same treatment liquid having a long treatment time such as plating treatment are adjacent to each other. By disposing it, the processing time is lengthened without affecting the processing time in another processing liquid tank.

Further, by covering the surface of the rotary shaft connecting the chuck part and the driving force transmitting part for rotationally driving the chuck part with a resin material, wear of the sealing surface, corrosion of the rotary shaft,
Prevents the deposition of plating on the surface of the rotating shaft and maintains the sealing performance.

Further, by disposing an annular electrode having a radial notch on the inner periphery thereof which is easily deformed by an external force, the chuck portion is deficient in surface treatment due to poor contact between the object and the electrode and the object to be treated. Prevent damage to things.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the surface treatment apparatus according to the present invention will be described below based on the illustrated embodiments. The surface treatment apparatus holds the treatment liquid tank 1 and the treatment object 10 so as to immerse the treatment object 10 in the treatment liquid of the treatment liquid tank 1 and move so as to circulate through the treatment liquid tank 1 in order. The object holding member 2, a moving device 3 for moving the object holding member 2 so as to sequentially circulate in the treatment liquid tank 1, and a chuck rotation driving device 4.

The treatment tank 1 is formed by connecting a plurality of treatment liquid tanks containing various treatment liquids for surface treatment of the object 10 to be treated. In the present embodiment, the electrolytic degreasing tank 11,
Washing tanks 12a and 12b, activated acid tank 13, chrome plating tanks 14a and 14b, plating solution recovery tank 15, washing tank 16a,
Although the treatment liquid layers are arranged in series in the order of 16b, the arrangement of the treatment liquid tank and the like can be appropriately changed according to the content of the surface treatment. In addition, the washing furnace 16a, 16b is followed by a drying furnace 17
To arrange.

In this case, as for the processing steps such as the chrome plating tanks 14a and 14b for performing the plating processing, which require a longer time for the surface treatment of the object to be treated than the other processing liquid tanks, the same type of processing solution is used. By arranging the treatment liquid tanks consisting of 2 adjacent to each other, the treatment time can be lengthened without affecting the treatment time in the other treatment liquid tanks.

Further, an electrode (anode) 5 is provided in the processing liquid tank 1.
1, 52a, 52b are provided, one end of which is used as a power source (not shown) and the other end of which is electrolytic degreasing bath 11 and chrome plating bath 14
It is connected to an electrode member (anode) (not shown) arranged in the treatment liquids a and 14b.

As the electrode member (anode), a plurality of, for example, four electrode members (anodes) are formed on the processed material 10 so as to surround the processed material 10 with a plated metal having substantially the same length as the processed material 10. Although arranged in parallel, in this case, the chuck portion 2 also serves as an electrode (cathode) for the distance between the electrode member (anode) and the object to be treated.
It is desirable to dispose so that the distance becomes smaller as the distance from the terminals 1 and 22 increases. As a result, it is possible to eliminate unevenness in the treatment of the object to be treated in the longitudinal direction and form a uniform thin film plating layer on the surface.

The object holder 2 holds the object 10 to be dipped in the treatment liquid in the treatment liquid tank 1 and moves by the moving device 3 so as to sequentially circulate between the plurality of treatment liquid tanks 1. The object holder frame 2a, the carrier holding portion 2b fixed to the center of the upper surface of the object holder frame 2a, and the pressing members 32c of the moving device 2 fixed to both ends of the upper surface, which will be described later, are pressed. A pressing plate 2c, a slide bush 2d that slides on a pedestal 31a of a moving device 3 (described later) fixed to both ends of the lower surface of the workpiece holder frame 2a, and a long workpiece 10 lying down. A chuck portion 21 also serving as an electrode to be held, a chuck portion 22 having an electrode 23, a driving force transmission portion 24 composed of a gear 24e and the like, and a sliding contact portion electrically connected to the chuck portions 21 and 22. 25, the driving force transmission unit 24 and A seal box 26 for accommodating the sliding contact portion 25 is used. The chuck rotation drive device 4 interposes the driving force transmission portion 24 by the chuck rotation drive device 4 in a state where the workpiece 10 is immersed and held in the processing liquid in the processing liquid tank 1. Chuck part 21,
22 is configured to be rotatable. The number of the workpiece holders 2 to be circulated is not particularly limited, but in order to efficiently perform the surface treatment, the number of treatment liquid tanks is set to the number of standbys (typically 1 to 2) at the detachable mount 62 or the like. It is the added number.

The chuck portion 21 comprises a chuck portion main body 21a fixed to the rotary shaft 24c of the driving force transmitting portion 24 and a fixing metal fitting 21b, and the fixing metal fitting 21b is the object 1 to be processed.
It is desirable that 0 can be easily attached and detached in a short time. In the case where the object to be processed 10 is the heat collecting tube used in the solar water heater shown in FIG. 8, the object to be processed is prevented in order to prevent deformation of the object to be processed due to water pressure and intrusion of the processing liquid into the object to be processed. The object 10 to be processed is chucked by the chuck part 2 with the stopper 10c made of rubber or synthetic resin being provided in the opening 10a of the object 10.
Fixed to 1.

The chuck portion 22 has a fitting portion 22a fixed to the rotary shaft 24c of the driving force transmitting portion 24, and the fitting portion 22a is provided with a radial notch 23a which is easily deformed by an external force. The provided annular electrode 23 is arranged. The ring-shaped electrode 23 is a consumable item and is fixed to the chuck portion 22 by a screw 22b so that it can be easily replaced when damaged. In this case, it is desirable that the annular electrode 23 is pre-pressed so as to follow the shape of the end portion 10b of the object to be processed 10, and in order to prevent contact failure between the object to be processed and the electrode, After mounting the end portion 10b of the workpiece 10 on the annular electrode 23,
The circumference of the annular electrode 23 may be fixed with a resin band or the like. When the material of the object to be processed 10 is a material having good conductivity such as copper, the annular electrode 23 is omitted,
The end portion 10b of the object to be processed 10 may be configured to be slidably supported by the fitting portion 22a. On the other hand, the object to be processed 1
When the material of No. 0 is a substance having poor conductivity such as stainless steel, the annular electrode 23 is provided to prevent surface treatment failure and damage to the object due to poor contact between the object and the electrode. It is desirable to do.

The rotating shaft 24c is covered with a resin material 24d in order to prevent wear of the sealing surface, corrosion of the rotating shaft, and deposition of plating on the surface of the rotating shaft, and to maintain the sealing performance. A ring 26b made of polytetrafluoroethylene is slidably attached to the surface of a ring 26a made of ceramics, which is tightly fixed to the surface of 26, by a mechanical seal urged by a spring 26d.
An O-ring 26c is provided at a sliding contact portion of the resin material 24d that covers the surface of the rotating shaft 24c. The resin material 24d may be a heat-converging resin or another resin material. Further, the resin material 24d is not limited to the sliding contact portion between the rotary shaft 24c and the seal box 26, but may be contacted with the processing liquid. It is desirable to dispose all the surfaces to be covered. In this case, an O-ring 24f is provided at the fitting portion between the chuck portions 21 and 22 and the rotary shaft 24c to prevent plating metal from depositing at the fitting portion between the chuck portions 21 and 22 and the rotary shaft 24c. To do.

The driving force transmitting portion 24 is a sprocket 24a which receives a driving force from the driving chain 4b of the chuck rotation driving device 4, the driving force transmitting portion 24 of one seal box 26 and the driving force transmitting portion of the other seal box 26. Driving force transmission shaft 24b for interlocking 24, chuck portions 21 and 22
The rotary shaft 24c is connected to the rotary shaft 24c, and the driving force from the drive chain 4b is transmitted to the rotary shaft 24c. The rotary shaft 24
The bearing c is rotatably supported by a bearing 24g provided in the seal box 26.

The sliding contact portion 25 electrically connects the electrode (cathode) 53 arranged in the processing liquid tank 1 and the rotating shaft 24c.

In this embodiment, the seal box 26 containing the driving force transmitting portion 24 and the sliding contact portion 25 is contained.
Are provided on both sides of the workpiece holder 2, but when the material of the workpiece 10 is a highly conductive substance such as copper, only one chuck portion 21 is energized and the other chuck portion 21 is energized. 22
May be configured so that the end portion 10b of the object to be processed 10 can be slidably supported. In this case, the seal box 26 may be provided only on the chuck portion 21 side.

The moving device 3 includes an up-and-down moving platform 31 for vertically moving the workpiece holder 2 on the treatment liquid tank 1, and the workpiece holder 2 attached to and detached from the starting platform 61 in sequence. The feeding device 32 for moving the pedestal 62 forward, and the workpiece 10 whose surface treatment has been completed on the detachable pedestal 62 are separated from the workpiece holder 2 and a new workpiece holder on which a new workpiece 10 is mounted is attached. The body 2 is composed of a transport carrier 33 that transports the body 2 from the removable mount 62 to the start mount 61.

In the vertical moving mount 31, the mount 31a is fixed to the slide metal 31b which slides on the guide rail 3b fixed to the vertical frame 3a, and the lift chain 31c fixed to the slide metal 31b is driven by the motor 31d. The gantry 31a is configured to move up and down. The slide metal 31 of the lift chain 31c
A balance weight 31e is arranged on the other end side of b. Then, when the vertically movable pedestal 31 is in the raised position, the slide bushes 2d fixed to both ends of the lower surface of the workpiece holder frame 2a of the workpiece holder 2 are placed on the pedestal 31a and slide on it. To configure.

The feed device 32 supports a T bar 32a horizontally slidably on a T bar guide 3c fixed to a vertical frame 3b, and a T bar driving device 32b arranged on the vertical frame 3b is driven by a motor 32d. By doing T
The bar 32a is configured to slide horizontally. Then, when the vertically movable platform 31 is in the raised position, the T bar 32
The pressing members 32c fixed to a press the pressing plates 2c fixed to both ends of the upper surface of the workpiece holder frame 2a to move the workpiece holder 2 from the start mount 61 to the processing liquid tank 1 and the detachable mount 62. Move forward synchronously in order.

The carrier 33 is an upper horizontal frame 3d.
The workpiece holder 2 is suspended from a guide rail 3e fixed to the workpiece and is moved along the guide rail 3e by a driving device (not shown), so that the workpiece holder 2 can be attached to and detached from the platform 6.
A carrier carrier main body 33a that moves along the guide rails 3e from the position 2 to the start frame 61, a support column 33b having a guide rail vertically extending from the carrier carrier main body 33a, and a drive device along the guide rails (Fig. From the slide metal 33c that slides by (not shown) and the engagement piece 33d for locking the transport carrier holding portion 2b that is fixed to the slide metal 33c and is fixed to the center of the upper surface of the workpiece holder frame 2a. Constitute.

The chuck rotation drive device 4 includes sprockets 4a disposed at both upper ends of the processing liquid tank 1 which is rotationally driven by a motor (not shown), and both sprockets 4a.
It is composed of a drive chain 4b that is bridged in between. In addition,
The chuck rotation driving device 4 may be configured to drive the chucks 21 and 22 for each of the transported object holders 2 by disposing an electric motor or the like in each seal box 26.

In order to carry out the surface treatment of the object 10 made of a long and thin metal tube such as a heat collecting tube used for a solar water heater by the surface treating apparatus constructed as described above, The plurality of treatment object holders 2 holding the object 10 in a recumbent state are moved by the moving device 3 so as to sequentially circulate through the plurality of treatment solution tanks 1 arranged in series, and each treatment solution tank is moved. At the position of 1, the object holder 2 is lowered by the moving device 3 and the held object 10 is immersed in the treatment liquid in the treatment liquid tank 1 to perform the required surface treatment, and the treatment liquid tank concerned. When the surface treatment in 1 is completed, the moving device 3 raises the object-to-be-treated holding body 2 and moves the object-to-be-treated holding body 2 so as to circulate in the processing liquid tank 1 of the next step in order in synchronization. . When the object to be processed 10 is a heat collecting tube or the like used in the solar water heater shown in FIG. 8, in order to prevent deformation of the object to be processed due to water pressure and intrusion of the processing liquid into the object to be processed, The object to be processed 10 is fixed to the chuck portion 21 in a state where the opening 10a of the object to be processed 10 is provided with the plug 10c formed of rubber or synthetic resin. Then, all the surface treatments are completed, and the object-to-be-held 2 which has reached the detachable mount 62
Separates the object 10 to be processed whose surface treatment is completed from the object holder 2 on the detachable mount 62. It should be noted that the object to be processed holder 2 obtained by separating the object to be processed 10 is a new object to be processed 1
After mounting 0, the carrier frame 33 is used to attach and detach the platform 62.
Is conveyed to the start stand 61 and is circulated for use.

At this time, the electrode (cathode) of the workpiece holder 2
While holding the object to be processed 10 in a recumbent state by the chuck portions 21 and 22 which also function as the chuck portions, the chuck portion rotation drive device 4
The chuck parts 21, 22 via the driving force transmission part 24.
By rotating the, the unevenness of the process caused by the distance between the electrode member (anode) and the object to be processed differs depending on the position of the surface of the object to be processed, while suppressing the influence of the gas generated during plating, A uniform thin film plating layer is formed on.

Further, since the time required for the surface treatment of the object to be treated 10 is largely different in each treatment liquid tank 1, by disposing the treatment liquid tanks having a long treatment time such as the plating treatment adjacently, the same kind of treatment liquids can be provided. Prolong the treatment time with the treatment liquid.

Further, a driving force transmitting portion 24 for rotationally driving the chuck portions 21, 22 and a sliding contact portion 25 electrically connected to the chuck portion 24 are housed in a seal box 26.
Surface treatment is performed by immersing the seal box 26 in the treatment liquid in the treatment liquid tank 1.

Further, by covering the surface of the rotary shaft 24c, which connects the chuck parts 21 and 22 and the driving force transmitting part 24 for rotationally driving the chuck parts, with the resin material 24d, abrasion of the seal surface and rotation of the rotary shaft 24c are prevented. Corrosion and deposition of plating on the surface of the rotary shaft 24c are prevented, and the sealing performance is maintained.

Further, the chuck portion 22 is provided with the annular electrode 23 having the radial notches 23a which are easily deformed by the external force, thereby ensuring the contact between the workpiece 10 and the electrode.

[0035]

The surface treatment apparatus of the present invention is capable of forming a uniform thin film plating layer on the surface of a long and thin metal tube such as a heat collecting tube used in a solar water heater. The device itself can be made compact. In particular, by holding the object to be processed in a recumbent state by the chuck part that also serves as the electrode (cathode) of the object to be processed holder, the chuck part rotation drive device rotates the chuck part via the driving force transmission part. , Eliminates the unevenness of the process caused by the distance between the electrode member and the object to be processed depending on the position of the surface of the object to be processed, suppresses the effect of gas generated during the plating process, and forms a uniform thin film plating layer on the surface. Can be formed. Further, it is possible to prevent the plating metal from depositing on the surfaces of the driving force transmitting portion and the sliding contact portion, and reduce the breakdown of the device.

Further, according to the surface treatment apparatus of the second aspect of the present invention, it is possible to prolong the treatment time with the treatment liquid of the same type without affecting the treatment time in the other treatment liquid tank, and further improve the productivity. can do.

According to the surface treatment apparatus of the third aspect of the present invention, wear of the seal surface, corrosion of the rotary shaft, and deposition of plating on the surface of the rotary shaft are prevented, and good sealing performance is maintained. Device failures can be reduced.

Further, according to the surface treatment apparatus of the fourth aspect of the present invention, it is possible to prevent defective surface treatment and damage of the object to be treated due to poor contact between the object to be treated and the electrodes. Even if the material is a material having poor conductivity such as stainless steel, a uniform thin film plating layer can be formed on the surface of the object to be treated.

[Brief description of drawings]

FIG. 1 is a front view of a surface treatment apparatus of the present invention.

FIG. 2 is a side view of the surface treatment apparatus of the present invention.

FIG. 3 is a plan view of a treatment liquid tank of the surface treatment apparatus of the present invention.

FIG. 4 is a front view of a workpiece holder of the surface treatment apparatus of the present invention.

FIG. 5 is a diagram showing a chuck portion of a workpiece holder according to the present invention.

FIG. 6 is a diagram showing a chuck portion of a workpiece holder according to the present invention.

FIG. 7 is a diagram showing an example of a sealing surface of a rotary shaft of a workpiece holder according to the present invention.

FIG. 8 is a diagram showing an example of an object to be processed.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 treatment liquid tank 2 object to be treated holder 21 chuck part 22 chuck part 23 annular electrode 24 driving force transmitting part 24c rotating shaft 24d resin material 25 sliding contact part 26 seal box 3 moving device 4 chuck rotating drive device 10 object Treated product 10c stopper

Claims (4)

[Claims] 1. A plurality of processing liquid tanks arranged in series, and an object to be processed that holds the object to be processed and is immersed in the processing liquid in the processing solution tank, and circulates in sequence between the plurality of processing solution tanks. In the surface treatment apparatus, the surface treatment apparatus comprises: The object holder includes a chuck section that also serves as an electrode for holding a long object to be laid down, a driving force transmission section that rotationally drives the chuck section, and an electrical connection between the driving force transmission section and the chuck section. A surface treatment apparatus comprising: a seal box that accommodates a sliding contact portion connected to, and that isolates the driving force transmitting portion and the sliding contact portion from the treatment liquid. 2. A treatment liquid tank for performing a surface treatment with the same treatment liquid is arranged adjacent to each other.
The surface treatment device described. 3. The resin material covers the surface of a rotating shaft that connects the chuck portion and a driving force transmitting portion that rotationally drives the chuck portion, with a resin material. Surface treatment equipment. 4. The surface treatment apparatus according to claim 1, wherein the chuck portion is provided with an annular electrode having radial notches formed on an inner circumference thereof which is easily deformed by an external force. .