JP2011058024A - Surface treatment device for small article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface treatment device for a small article which performs treatment in a state where a treatment tank is revolved and is further rotated, where the number of revolutions and the number of rotations can be individually changed so as to improve the quality of products. <P>SOLUTION: The surface treatment device is equipped with: a revolution shaft 3; a revolution table 22 fixed to the revolution shaft 3; and a plurality of treatment tanks 21 arranged on the same circumference with a revolution axial center O1 as the center and capable of rotating via respective rotation shafts 32 to the revolution table 22. Each treatment tank 21 includes an anode 56 and a cathode part, further stores a treatment liquid and a workpiece, revolves the treatment tank 21 around the revolution shaft 3, and simultaneously rotates the same around the rotation shaft 32. The above device is further provided with: a driving motor 11 for revolution rotatively driving the revolution shaft 3; and a driving motor 24 for rotation rotatively driving the respective treatment tank 21 around the rotation shaft 32. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention is for small articles suitable for surface treatment of small articles (small parts) such as powder of 0.5 to 5000 μm, chip capacitors, diodes, connectors, reed switches, nails, bolts, nuts, washers and the like. The present invention relates to a surface treatment apparatus.

  As surface treatment for small articles, (1) electroplating treatment, (2) electroless plating treatment; for example, immersion plating treatment, chemical plating treatment, (3) composite plating treatment, chemical composite plating treatment, (4) electrodeposition coating Treatment: for example, anion electrodeposition coating treatment, cationic electrodeposition coating treatment, (5) pretreatment; for example, degreasing treatment, electrolytic degreasing treatment, barrel polishing treatment, alkali dipping washing treatment, pickling treatment, acid electrolysis treatment, chemical polishing Treatment, electrolytic polishing treatment, neutralization treatment, (6) post-treatment; for example, draining discoloration prevention treatment, water-soluble resin treatment, chromate treatment.

  FIG. 29 is an electroplating apparatus for small articles described in Patent Document 1, and a pair of treatment tanks (electrolysis tanks) 202 are respectively disposed on a revolution table 201 that rotates integrally with the revolution shaft 200 via a rotation shaft 203. It is supported so that it can rotate. Each processing tank 202 includes a cathode outer cylinder 210 and an anode inner cylinder (anode) 211. Each processing tank 202 stores a large number of small workpieces and an electrolyte from a supply pipe 212 or the like. Supplied. The pair of treatment tanks 202 are rotated while revolving and energized between the cathode outer cylinder 210 and the anode inner cylinder 211, thereby plating the workpiece surface. During the plating operation, the work in the treatment tank 202 is accumulated on the inner peripheral surface of the cathode outer cylinder 210 on the centrifugal force acting direction (arrow RCF) side by revolving the treatment tank 202 around the revolution axis 200. And the work is agitated by rotating around the rotation axis 203. Thereby, a uniform plating layer is formed on the surface of each workpiece.

  As a drive mechanism of the above-described conventional electroplating apparatus, a single drive motor 220 is provided, and the revolution shaft 200 is rotated through the belt transmission mechanism 221 and the primary gear mechanism 222 using the drive motor 200 as a drive source, In addition, each processing tank 202 is rotated from the revolution shaft 200 via the secondary gear mechanism 223.

  In addition to the above-mentioned Patent Document 1, there are apparatuses described in Patent Documents 2 and 3 below as surface treatment apparatuses having a structure that revolves while rotating the treatment tank during the surface treatment operation. Are revolved around the revolution axis by the same drive source, and are rotated around the revolution axis via a gear mechanism or a planetary gear mechanism.

Japanese Utility Model Publication No. 47-28909, JP 56-119799 A, JP-T-2006-509108

  In the conventional electrolytic plating apparatus of FIG. 29, when the work is pressed against the inner peripheral surface of the cathode outer cylinder 210 of the treatment tank (electrolysis tank) 202 by revolution, if the revolution speed is low, the centrifugal force is insufficient, As shown in FIG. 30, the workpiece W is not uniformly dispersed on the inner peripheral surface of the cathode outer cylinder 210, but is biased downward and has a non-uniform thickness. When the plating process is performed in this state, since the lower end portion (arrow B1 portion) has a large number of workpieces W, the current does not reach all the workpieces W and plating is difficult to be applied. On the other hand, since the work W is small at the upper end portion (in the vicinity of the arrow B2), current concentrates on the work W, plating is excessively applied, and the work W is aggregated. Therefore, in order to disperse the workpiece W with a uniform thickness within a predetermined range of the inner peripheral surface of the cathode outer cylinder 210, it is necessary to revolve at a high speed equal to or higher than a predetermined value, and to increase the size and specific gravity of the workpiece W. Accordingly, it is necessary to set the revolution speed.

  On the other hand, the purpose of rotating the treatment tank 202 is to prevent the workpieces from adhering like a bunch of grapes while plating the workpieces to a uniform thickness by stirring the workpieces as described above. Yes, it is necessary to slowly stir, and it is necessary to change the strength of stirring according to the strength (easy to break) and specific gravity of the workpiece. This change in strength of the stirring is adjusted by changing the rotation speed of the rotation.

  However, as shown in FIG. 29 and other conventional technologies, the revolution and rotation of the processing tank are performed by the same drive source, and the rotation shaft is driven from the revolution shaft via the gear mechanism or the planetary gear mechanism. A gear mechanism or the like is required, and it is difficult to individually change the revolution speed and the rotation speed to desired values.

(Object of invention)
An object of the present invention is to provide a small surface treatment apparatus for performing surface treatment such as plating in a state where the treatment tank is revolved and rotated, and the entire apparatus and the power transmission system are made compact and simplified, and the revolution speed and It is to provide a surface treatment apparatus in which the quality of surface treatment is improved by making it possible to easily and individually change the rotation speed according to the type of workpiece. Another object of the present invention is to facilitate the loading and unloading of workpieces, in particular, to facilitate the loading and unloading of fine workpieces, and to prevent leakage of workpieces and processing liquid during workpiece processing.

  In order to solve the above-described problems, the present invention provides a revolving shaft, a revolving table fixed to the revolving shaft and rotating integrally with the revolving shaft, and the same circumference centered on the revolving shaft core. A plurality of treatment tanks supported by a revolving table so as to be capable of rotating through respective rotation shafts, each of the treatment tanks having an anode and a cathode part, and containing a treatment liquid and a small work, and the plurality of treatments. In a small surface treatment apparatus for surface treating a small work in a treatment tank by revolving around the revolution axis and simultaneously rotating around the rotation axis, a revolution drive motor that rotationally drives the revolution shaft, and In addition to the revolution driving motor, each processing tank includes a rotation driving motor that rotationally drives each processing tank around a rotation axis.

  With the above configuration, the entire apparatus and the power transmission system can be made simple and compact, and the revolution speed and rotation speed can be freely set so that high-quality surface treatment can be performed according to the type of workpiece. And it can be set easily.

  In the above-described surface treatment apparatus for small items, the present invention may preferably employ the following configuration.

(1) A processing liquid passage provided in the revolution shaft as a processing liquid path from a processing liquid supply unit such as a liquid supply pump disposed outside the processing tank to each processing tank, and A plurality of liquid supply pipes connected to the outlet and reaching each processing tank, and an inlet of the processing liquid passage is connected to the processing liquid supply unit via a rotary joint, and an outlet of each of the liquid supply pipes is It is connected to an anode support member disposed on the rotation axis of each treatment tank.

  According to the above configuration, the processing liquid can be supplied from the revolution shaft to the processing tank through a substantially completely sealed supply path, and the processing liquid does not leak even if it rotates at high speed, so that the processing liquid is not wasted. Can be supplied efficiently. In particular, when processing micrometer-level fine particles as a workpiece, the specific gravity of the workpiece may not be significantly different from the specific gravity of the processing liquid. Even in this case, leakage of the processing liquid may occur by increasing the centrifugal force by increasing the revolution speed. Without generating, the work can be brought into uniform contact with the inner peripheral surface of the cylindrical body of the processing liquid.

(2) Each of the rotation shafts is rotatably supported by the revolving table and includes a rotation table, and the processing tanks are detachably attached to the rotation tables.

  According to the said structure, a workpiece | work can be supplied and taken out in the state which removed the processing tank from the autorotation table, and the efficiency of the loading and unloading work of a workpiece | work improves. In particular, in the work of taking in and out a fine work, it is possible to prevent the omission of the work and to easily take out the work adhered in the treatment tank with the treatment liquid even during unloading.

(3) The treatment tank includes a cylindrical main body having both ends opened in the direction of the rotation axis, a porous filter having pores that close each open end of the cylindrical main body and allow a treatment liquid to pass through. And a lid for sandwiching each porous filter between the end faces of the cylindrical main body.

  According to the above configuration, even when revolving at a high speed, there is no fear that a small work leaks from the processing tank, the loss of the work can be eliminated, and by adopting a porous body with a pore size of micron unit, It can easily handle micron level workpieces.

(4) A hole for discharging the processing liquid is formed in each of the lid bodies and the rotation table that supports the processing tank.

  According to the above configuration, since the drainage area from the filter or the like is increased, the drainage can be sufficiently drained even if a filter having a fine eye and a small drainage amount is used.

(5) The end portion in the rotation axis direction of the inner peripheral surface of the cylindrical main body is inclined toward the rotation axis side toward the outer side in the rotation axis direction.

  According to the said structure, it can prevent that a fine workpiece | work is clogged between the edge of the rotating shaft direction of the internal peripheral surface of a cylindrical main body, and a filter.

(6) The treatment tank includes a cylindrical main body that is open at both ends in the direction of the rotation axis, and a lid that closes each open end of the cylindrical main body. A discharge passage is provided for discharging the processing liquid in the tank in a direction substantially perpendicular to the rotation axis.

  According to the above configuration, it is possible to prevent clogging of fine workpieces compared to the case where a porous filter having intricate pores is provided, and even if clogged, it can be easily discharged by disassembling and cleaning. The clogging of the work in the passage can be removed.

(7) The cylindrical main body is formed in a cylindrical shape, and the inner peripheral surface of the cylindrical main body has an uneven shape.

  According to the said structure, when a workpiece | work is stirred by rotation of a processing tank, stirring of a workpiece | work is accelerated | stimulated by an uneven surface.

(8) The cylindrical main body is formed in a polygonal shape.

  According to the said structure, when a workpiece | work is stirred by rotation of a processing tank, stirring of a workpiece | work is accelerated | stimulated by the V-shaped surface formed in an adjacent surface.

(9) The cylindrical main body is formed of a conductive member, and the entire periphery can be energized as a cathode portion.

  According to the said structure, it becomes unnecessary to provide a cathode part separately by utilizing cylindrical main body itself as a cathode part.

(10) The cylindrical main body is formed of a non-conductive member, and a large number of power supply members made of a conductive material protrude from the inner peripheral surface of the cylindrical main body.

  According to the said structure, when stirring a workpiece | work by rotation of a processing tank, stirring of a workpiece | work is accelerated | stimulated by the convex-shaped part comprised by an electric power feeding member.

(11) Each of the power supply members is exposed on the outer peripheral surface of the cylindrical main body, and a power supply band that can come into contact with the outer exposed surface of the power supply member is disposed on the outer side in the revolving radius direction of the cylindrical main body. By this rotation, only the power supply member on the outer side in the revolving radius direction of the cylindrical main body is configured so as to be in contact with the power supply band and energized sequentially. Moreover, in this case, the anode disposed on the rotation axis side of the treatment tank can be energized only in a portion facing the outer side portion in the revolution radius direction of the cylindrical main body.

  According to the above configuration, only the portion on the centrifugal force acting direction side in contact with the workpiece is energized and the portion not in contact with the workpiece is not energized by the centrifugal force based on the revolution, so that the plating solution is not wasted. If a part that is not in contact with the workpiece is energized, plating deposits will grow on the part, which may peel off and mix with the workpiece, which may result in a defective product. Can be prevented.

(12) A plurality of guide wheels that are in contact with the outer peripheral surface of the processing tank are disposed around the processing tank at intervals around the axis of rotation.

  According to the above configuration, the processing tank rotates around the axis of rotation without rattling, and revolves without detaching from the revolving table or the like for high-speed revolution.

  In short, according to the present invention, the power transmission system can be made simple and compact, and according to the type of workpiece, the revolution speed and the rotational speed can be freely set so that a high-quality surface treatment can be performed, and It can be set easily.

BRIEF DESCRIPTION OF THE DRAWINGS It is the 1st Embodiment of this invention, Comprising: It is the whole perspective view of the electrolytic plating apparatus for small articles. FIG. 2 is an overall perspective view of the accessory electroplating apparatus shown in FIG. 1 with the upper half shroud removed. It is a longitudinal cross-sectional view of the electroplating apparatus for small objects of FIG. It is a perspective view of the principal part of FIG. It is a disassembled perspective view of a processing tank. It is a longitudinal cross-sectional view of a processing tank. It is an enlarged view of the VII part of FIG. It is an expansion perspective view of a processing tank. It is sectional drawing of the processing tank which shows the initial state in a loading process. It is sectional drawing of the processing tank at the time of a processing tank assembly completion in a loading process. It is sectional drawing, such as a rotation table before supply of a processing tank, and a liquid supply pipe. It is sectional drawing of the autorotation table after a processing tank attachment, a liquid supply pipe, and a processing tank. It is sectional drawing of the processing tank which shows the favorable state of the workpiece | work in plating operation. It is sectional drawing of the processing tank which shows the state with a bad workpiece | work in plating operation. It is the 2nd Embodiment of this invention, and is a perspective view of the principal part of an electroplating apparatus. It is a horizontal sectional view of the processing tank of FIG. It is the 3rd Embodiment of this invention, and is a perspective view of the cylindrical main body of a processing tank. FIG. 18 is a perspective view of the power feeding rod of FIG. 17. It is the 4th Embodiment of this invention and is a horizontal sectional view of a processing tank. It is the 5th Embodiment of this invention and is a perspective view of the cylindrical main body of a processing tank. It is the 6th Embodiment of this invention and is a disassembled perspective view of a processing tank. It is a 7th embodiment of the present invention and is an exploded perspective view of a processing tub. It is the 8th Embodiment of this invention and is a disassembled perspective view of a processing tank. It is a 9th embodiment of the present invention and is an exploded perspective view of a processing tub and a rotation table. It is a 10th embodiment of the present invention and is an exploded perspective view of a processing tub and a rotation table. It is 11th Embodiment of this invention and is sectional drawing of the principal part of an electroplating apparatus. It is a top view of the support plate of the apparatus of FIG. It is a perspective view which shows the modification of a cylindrical main body. It is a front view of a prior art example. It is a longitudinal cross-sectional schematic diagram of the processing tank in the operation | work of a prior art example.

[First Embodiment]
1 to 14 show an accessory electroplating apparatus according to a first embodiment of the present invention. The first embodiment will be described with reference to these drawings.

  FIG. 1 is a perspective view of the entire small-sized electroplating apparatus, which includes a vertically long rectangular frame frame 1, and a substantially horizontal substrate-and-drip pan 2 is provided at an upper and lower middle portion of the frame 1. Yes.

  Bearing devices 5 and 6 are fixed to the lower side of the drip pan 2 and the upper end portion of the gantry frame 1 via support frames 8 and 9, respectively. The shaft 3 is rotatably supported.

  In the lower half of the gantry frame 1, a revolution drive motor 11 and a liquid supply pump (schematic diagram) 13 as a processing liquid supply unit are disposed. The revolution drive motor 11 is driven by a belt transmission mechanism 14 and the revolution shaft 3. It is connected to the power transmission.

  An annular enclosure wall 17 is provided on the upper surface of the drip pan 2, and a cylindrical shroud 18 having an upper wall 18 a is provided, and main members of the surface treatment apparatus are accommodated in the shroud 18. Yes.

  FIG. 2 is a perspective view of the entire apparatus with the shroud 18 removed, and the drip pan 2 having the surrounding wall 17 has a function of collecting and discharging the processing liquid after use, and discharging the processing liquid. A discharge hole 20 is formed, and an annular inner enclosure wall 29 is also provided at the center.

  In the shroud 18 in the upper half of the gantry frame 1, a pair of processing tanks 21, a revolution table 22, a support plate 23, and a pair of rotation driving motors 24 for individually driving the processing tanks 21. And a pair of liquid supply pipes 25 for supplying the processing liquid into each processing tank 21.

  FIG. 3 is a longitudinal sectional view of the entire electrolytic plating apparatus. The revolving table 22 is fixed to the revolving shaft 3 by a key 26 so as to rotate integrally with the revolving shaft 3, and the support plate 23 is formed from the revolving table 3. It is arranged above a certain distance and is fixed to the revolution shaft 3 by a key 27 so as to rotate integrally with the revolution shaft 3.

  A central hole 28 through which the revolution shaft 3 passes is formed at the center of the drip pan 2, and the inner surrounding wall 29 is provided so as to surround the central hole 28. A conical drip-proof cover 30 is disposed above the inner surrounding wall 29, and this drip-proof cover 30 is fixed to the revolution shaft 3 to prevent the processing liquid from flowing into the central hole 28.

  On the revolution table 22, a pair of rotation shafts 32 parallel to the revolution shaft 3 are rotatably supported via bearings 33 on the same circumference around the revolution axis O <b> 1. A rotation table 34 is formed integrally with the rotation shaft 32 at the upper end of each rotation shaft 32, and each processing tank 21 is detachably fixed on each rotation table 34.

  Each rotation drive motor 24 is disposed at a position substantially corresponding to each rotation shaft 32, and is fixed to the lower surface of the revolution table 22. The output shaft of each rotation drive motor 24 is connected to each rotation shaft 32 through a joint. ing.

  The revolution shaft 3 is formed in a hollow cylindrical shape, and a treatment liquid passage (passage tube) 40 extending in the vertical direction along the revolution shaft core O1 is provided in the revolution shaft 3 and is used for the drive motor 24 for rotation. And an anode electric wire for electrolysis are arranged.

  A slip ring 41 for energization is provided below the revolution shaft 3, for example, on the outer periphery of the revolution shaft 3 portion between the drip pan 2 and the lower bearing device 6. The slip ring 41 has a well-known structure that allows energization between the rotating member and the fixed member. The slip ring 41 is fixed to the revolving shaft 3 and rotates integrally with the revolving shaft 3. The cathode and anode of the DC power source 35 for the rotation driving motor 24 and the cathode and anode of the DC power source 36 for electrolysis are connected to a plurality of connection terminals provided on the outer ring member. Has been. The anode and anode of the DC power source 35 for the rotation drive motor 24 and the anode of the DC power source 36 for electrolysis are connected to the electric wires in the revolution shaft 3 via the inner and outer ring members of the slip ring 41, and the DC power source 36 for electrolysis. The cathode is electrically connected to the revolution shaft 3 itself having conductivity.

  A liquid pipe 43 is connected to the lower end portion of the revolution shaft 3 through a rotary joint pipe 42, the liquid pipe 43 is connected to the liquid supply pump 13, and a suction port of the liquid supply pump 13 is a liquid pipe 44. Is connected to the treatment liquid recovery tank 12. That is, the processing liquid in the processing liquid recovery tank 12 is sucked by the liquid supply pump 13, and the processing liquid is supplied to the processing liquid passage 40 in the revolution shaft 42 through the liquid pipe 43 and the rotary joint pipe 42. Yes. Further, the discharge hole 20 of the drip pan 2 reaches the processing liquid recovery tank 12 through the drain pipe 45.

  FIG. 4 is a perspective view of the main part of the electrolytic plating apparatus. The processing liquid passage 40 in the revolution shaft 3 extends upward to a position higher than the support plate 23 and has a pair of processing liquid outlets at the upper end thereof. The liquid supply pipe 25 is connected to each processing liquid outlet.

  FIG. 5 is an exploded perspective view of the processing tank 21, and FIG. 6 is a longitudinal sectional view of the processing tank 21. In FIG. 5, a processing tank 21 includes a cylindrical tubular body 51 formed of a conductive metal, for example, stainless steel, a flat columnar (disc-shaped) upper filter 52 formed of a porous body, and a lower part. The side filter 53 includes a disk-shaped upper lid body 54 and a lower lid body 55 formed of a conductive metal, a bottomed cylindrical anode 56, and the like. A flange 51a having a plurality of bolt insertion holes 60 (only one lead wire is shown) is formed integrally with the cylindrical main body 51 at the upper and lower ends of the cylindrical main body 51, and the upper and lower filters 52, 53 and the upper and lower filters The lids 54 and 55 are also formed with bolt insertion holes 61 and 62 (only one lead wire is shown) at positions corresponding to the bolt insertion holes 60 of the flange 51a. The rotation table 34 and the lower lid 55 are provided with a plurality of bolt insertion holes 63 and 64 for fixing the lower lid 55 to the rotation table 34 at positions radially outward from the bolt insertion holes 62. Each is formed. The rotation table 34 is formed with a hole 65 for receiving a bolt head used for assembling the processing tank 21.

  In FIG. 6, the bottomed cylindrical anode 56 is insoluble, and a liquid pipe 67 that penetrates in the vertical direction and has conductivity is fixed to the upper wall 56a of the anode 56. The lower portion of the liquid pipe 67 extends downward to a position substantially corresponding to the lower end of the anode 56 and opens downward. The upper end of the liquid pipe 67 protrudes upward from the upper wall 56a of the anode 56, and A conductive connecting pipe 68 is connected to the upward projecting portion as an anode support member. The connecting pipe 68 protrudes upward through a hole formed in the center of the upper filter 52 and the upper lid 54.

  On the lower surface of the upper lid 54 and the upper surface of the lower lid 55, a positioning annular step having the same inner diameter as the outer diameter of each filter 52, 53 is provided in order to position the upper and lower filters 52, 53 at the same center. 54a and 55a are formed, and an annular positioning step having the same outer diameter as that of the lower lid 55 is provided on the upper surface of the rotating table 34 in order to position the lower lid 55 at the same center. A portion 34a is formed.

  The upper filter 52 is placed on the upper surface of the upper end flange 51 a of the cylindrical main body 51, the upper lid body 54 is placed on the upper surface of the upper filter 52, and the upper filter 52 is fitted into the annular step 54 a of the upper lid body 54. The upper filter 52 and the upper lid 54 are fastened together with the upper end flange 51a by bolts 70 and nuts 71 inserted through the bolt insertion holes 61 and 62 from below.

  The lower filter 53 is overlaid on the lower surface of the lower end flange 51 a of the cylindrical main body 51, and the lower lid body 55 is overlaid on the lower surface of the lower filter 53 and the lower side in the annular step portion 55 a of the lower lid body 55. The filter 53 is fitted, and the lower filter 53 and the lower lid body 55 are fastened together with the lower end flange 51a by bolts 70 and nuts 71 inserted through the bolt insertion holes 61 and 62 from above. A collar is fitted as a vertical spacer in the bolt insertion holes 61 of the upper and lower filters 52 and 53.

  In the processing tank 21 assembled with the bolts 70 and the nuts 71 as described above, the lower lid 55 is placed on the upper surface of the rotation table 34 and fitted into the annular step portion 34a. Is positioned on the same centerline O2 as the rotation shaft 32, and the processing tank 21 is constituted by bolts 73 and nuts 74 inserted into the bolt holes 63 and 64 (see FIG. 5) of the lower lid 55 and the rotation table 34. The rotary table 34 is detachably attached.

  FIG. 8 is a perspective view of a state in which the assembled processing tank 21 is fixed to the rotation table 34. As described above, the cylindrical main body 51, the upper and lower filters 52 and 53, and the upper and lower lid bodies 54 and 55. The processing tank 21 is configured by fastening the upper and lower bolts with a plurality of upper and lower bolts 70, and the processing tank 21 is mounted on the rotation table 34 with a plurality of bolts 73 and the like.

  FIG. 7 is an enlarged view of an arrow VII portion in FIG. 6, and a tapered surface 51 b that is reduced in diameter downward is formed at the lower end of the inner peripheral surface of the cylindrical main body 51.

  11 shows the state of the rotation table 34 and the liquid supply pipe 25 before the treatment tank is attached, and FIG. 12 shows the state where the treatment tank 21 is attached to the rotation table 34 and the treatment tank 21 and the liquid supply pipe 25 are connected. Is shown. In FIG. 11, a through hole 78 is formed in the support plate 23 on the same axis as the rotation axis O 2, and a conductive joint pipe 79 for processing liquid is rotated in the through hole 78. It is arranged in the same axis as the axis O2. The joint pipe 79 has an attachment piece 79 a integrally, and the attachment piece 79 a is fixed to the lower surface of the support plate 23 with a bolt 80 and a nut 81. The liquid supply pipe 25 is formed in an L shape, and each liquid supply pipe 25 extends substantially horizontally from the revolving shaft 3 to an upper position of each joint pipe 79, and at an upper position of the joint pipe 79. It is bent downward. Tapered female threaded portions 79b and 79c are formed at the upper and lower ends of the inner peripheral surface of the joint pipe 79, and the lower tapered tapered male threaded portion of the liquid supply pipe 25 is screwed into the tapered female threaded portion 79b at the upper end. Yes.

  In FIG. 12, a tapered male thread portion 68 a at the upper end portion of the connection pipe 68 of the anode 56 is screwed to the tapered female thread portion 79 c at the lower end of the joint tube 79.

The support plate 23 is fixed to the outer peripheral surface of the revolution shaft 3 via an insulating member 47, whereby an electrical connection is established between the outer peripheral surface of the revolution shaft 3 having conductivity and the conductive support plate 23. Is shut off.

A plurality of guide wheel support shafts 49 are fixed to the outer portion of the support plate 23 on the same circumference around the rotation axis O2, and the guide wheel support shafts 49 are parallel to the rotation axis O2. The guide wheels 48 are rotatably supported at the lower ends of the guide wheel support shafts 49. Each guide wheel 48 is in contact with the outer peripheral edge of the upper lid 54 of the processing tank 21 on the rotation table 34 so as to be able to roll, and guides the processing tank 21 that is rotating so as not to swing from the rotation axis O2. .

  A plurality of (for example, three) guide wheels 48 are arranged at intervals in the circumferential direction of the processing tank 21, but mainly receive the centrifugal force (arrow RCFC) due to the revolution of the processing tank 21 in FIG. 4. Thus, it arrange | positions in the centrifugal force action direction (RCF) side by revolution among the perimeters of the upper side cover body 54 of the processing tank 21. FIG.

[Electricity supply route]
The current path of the electrolysis cathode is briefly summarized as follows. In FIG. 3, the cathode portion of the electrolysis DC power source 36 → the slip ring 41 → the outer peripheral wall of the revolution shaft 3 → the revolution table 22 → the bearing 33 → the rotation table 34 → The lower lid 55 → the bolt 70 → the cylindrical main body 51.

  The energization path of the electrolysis anode can be summarized as follows. In FIG. 3, the anode part of the electrolysis DC power source 36 → the slip ring 41 → the electric wire inside the revolving shaft 3 → the electric wire outside the revolving shaft 3 → the support plate 23 → The joint pipe 79 → the connection pipe 68 → the anode 56.

  In FIG. 3, the energization path to the rotation drive motor 24 is the cathode and anode of the rotation DC power source 35 → the slip ring 41 → the electric wire for rotation in the revolution shaft 3 → the rotation for rotation outside the revolution shaft 3. These are the cathode part and the anode part of the drive motor 24 for rotation.

[Processing liquid supply system route]
The supply path of the processing liquid (plating liquid) can be briefly summarized as follows. In FIGS. 3 and 6, the liquid supply pump 13 → the liquid pipe 43 → the rotary joint pipe 42 → the processing liquid passage 40 in the revolving shaft 3 → the liquid supply. The pipe 25 → the joint pipe 79 → the connection pipe 68 → the liquid pipe 67 in the anode 56 → the inside of the cylindrical main body 51. Further, the drainage path is as follows: inside the cylindrical main body 51 of the processing tank 21 → the pores of the upper and lower filters 52 and 53 → the shroud 18 → the outer surrounding wall 17 → the drip pan 2 → the discharge hole 20 → the processing liquid recovery tank 12. Yes.

[Plating work and effects]
In the work preparation stage, the revolution speed of the treatment tank 21 by the revolution drive motor 11 and the revolution speed of the treatment tank 21 by each revolution drive motor 24 can be set independently, and the size of the workpiece to be plated is large. It is set according to the weight, specific gravity and the like. For example, the revolution speed N1 is set within a range of 80 rpm to 1000 rpm, and the rotation speed is significantly less than the revolution speed and is set within a range of 1 to 30 rpm. As shown in FIG. 13, the revolution speed N <b> 1 is set so that the workpiece W in the processing tank 21 is placed on the inner peripheral surface of the cylindrical main body 51 on the centrifugal force acting direction (RCF) side by centrifugal force based on revolution. It is necessary to set the value to be pressed with a substantially uniform thickness. On the other hand, the rotation speed N2 is sufficient as long as the work W in the processing tank 21 is stirred by the rotation. Therefore, the revolution speed N1 is about several tens to several hundred times as high as the rotation speed N2. Incidentally, when the revolution speed N1 is too small for the workpiece W having a certain size, weight and specific gravity, the thickness of the workpiece W pressed against the inner peripheral surface of the cylindrical main body 51 is not uniform as shown in FIG. become. Specifically, the thickness increases as it goes downward, making it difficult to perform surface treatment with uniform quality.

The procedure of the plating operation will be described.
(1) The work W is loaded by removing the treatment tank 21 from the rotation table 34 in FIGS. 2 and 3, and removing the upper lid 54 and the upper filter 52 from the cylindrical main body 51 as shown in FIG. In the state. That is, the upper end of the processing tank 21 is released, and a predetermined amount of work W is put into the cylindrical main body 51 from above.

  Thus, since the processing tank 21 is removed from the rotation table 34 and the work W is loaded in a state where the upper end is released, even if there is a small work W, the processing tank 21 can be completely and easily put into the processing tank 21 without leaking to the outside. Can be thrown in.

(2) Next, in FIG. 10, the anode 56 is inserted into the cylindrical main body 51, and the upper filter 52 and the upper lid body 54 are sequentially placed on the upper end flange 51 a of the cylindrical main body 51 and the connecting pipe of the anode 56. 68 protrudes upward from the center hole of the upper filter 52 and the upper lid 54. Then, the upper filter 52 and the upper lid 54 are fastened to the upper end flange 5a by a plurality of bolts 70 and nuts 71. Thereby, the workpiece W is sealed in the processing tank 21.

(3) The processing tank 21 in which the workpiece W is sealed is placed on an empty rotation table 34 as shown in FIG.

(4) In FIG. 12, after the processing tank 21 is placed on the revolving table 3, the lower lid 55 of the processing tank 21 is fastened to the rotation table 34 with a plurality of bolts 73 and nuts 74, and the anode 56 is The upper end male screw portion 68 a of the connection pipe 68 is lifted and connected to the lower end female screw portion 79 c of the joint pipe 79. As a result, the treatment liquid path is connected to the treatment tank 21, and at the same time, the electrolytic anode path is electrically connected to the anode 56 via the support plate 23 and the joint pipe 79. Furthermore, the path of the cathode for electrolysis is also electrically connected to the cylindrical main body 51 through the revolution shaft 3, the revolution table 22, the bearing 33, the rotation shaft 32, the rotation table 34, the lower lid 55, and the bolt 70. The

(5) In the above state, the revolution driving motor 11 and the respective rotation driving motors 24 are rotated at a predetermined number of rotations to rotate both the processing tanks 21 around the revolution axis O1 and at the same time the rotation axis O2. At the same time, the treatment tank 21 is plated through the treatment liquid passage 40 in the revolution shaft 3, each liquid supply pipe 25, each joint pipe 79, each connection pipe 68 and each liquid pipe 67 by the liquid supply pump 13. Supply liquid. Then, the surface of each workpiece W is plated by energizing between the anode 56 and the cylindrical body 51 of the cathode. The plating operation by such revolution and rotation is continuously performed for several hours to several tens of hours. As described with reference to FIG. 13, the state of the workpiece during the plating operation is pressed to the inner peripheral surface of the cylindrical main body 51 on the centrifugal force acting direction (RCF) side with a substantially uniform thickness by the centrifugal force due to revolution. At the same time, it is stirred by rotation. Thereby, a plating layer is formed on the surface of all the workpieces W with a uniform thickness.

(6) During the above plating operation, the plating solution from the liquid supply pump 13 is continuously supplied to the treatment tank 21 as described above, but the used plating solution is contained in the upper and lower filters 52 and 53. And are discharged outward from the outer circumferential surface of each filter 52, 53 in the circumferential direction.

(7) The plating solution discharged from the radially outer peripheral surfaces of the filters 52 and 53 collides with, for example, the inner peripheral surface of the shroud 18 and falls or flows down, accumulates in the drip pan 2 through the outer surrounding wall 17 and is discharged. It is recovered from the hole 20 to the treatment liquid recovery tank 12. In the treatment liquid recovery tank 12, the purified and regenerated plating solution is supplied again from the liquid supply pump 13 to the treatment tank 21.

  As described above, during the plating operation, the plating solution is pumped from the liquid supply pump 13 to the processing tank 21 in the sealed path, and the processing liquid is recovered from the shroud 18 through the drip pan 2 in the sealed path. Since it is collected in the tank 12, the plating solution can be supplied and discharged with little leakage even during the plating operation by high-speed rotation.

(8) When the plating operation is completed, the revolution and rotation of the treatment tank 21 are stopped, and at the same time, the supply of the plating solution is stopped, and the treatment tank 21 is removed from the rotation table 34 in the reverse procedure to the loading operation. Further, the upper lid 54 and the upper filter 52 are removed, and the workpiece W after the plating process is taken out.

  In this case, as in loading, all the workpieces 9 after the plating process in the processing tank 21 can be taken out easily and reliably.

(9) Moreover, in this embodiment, since the taper surface 51b is formed in the lower end of the inner peripheral surface of the cylindrical main body 51 as shown in FIG. 7, even if a fine workpiece is pressurized by centrifugal force, It is possible to prevent the workpiece W from entering between the cylindrical main body 51 and the lower filter 53, and to improve the yield of the workpiece.

(10) In this embodiment, as shown in FIG. 4, since the guide wheel 48 for guiding the outer periphery of the processing tank 21 is provided, even if the processing tank 21 revolves at high speed, the processing tank 21 rotates on its axis of rotation. Smooth rotation without detachment from the core O2.

[Second Embodiment]
15 and 16 show a second embodiment of the present invention. The difference from the first embodiment is the structure of the cylindrical main body 51 and the electrolysis cathode part of the treatment tank 21, and others. The structure is the same as that of the first embodiment, and the same components are denoted by the same reference numerals.

  In FIG. 16, the horizontal cross-sectional view of the processing tank 21 is made of a non-conductive material such as resin, and the cylindrical main body 51 has a large number of power supply members (made of conductive metal) ( 110) is attached. Each power supply member 110 is press-fitted into a semispherical outer portion 110 a protruding outward from the outer peripheral surface of the cylindrical main body 51 and an attachment hole formed in the cylindrical main body 51, and is inserted into the inner peripheral surface of the cylindrical main body 51. The shaft portions 110 b of the desired number of power supply members 110 out of all the power supply members 110 protrude inward from the inner peripheral surface of the cylindrical main body 51.

  An arc-shaped power feeding band 111 is arranged on the centrifugal force acting direction (RCF) side by the revolution of the processing tank 21, and power is supplied only to the power feeding member 110 in contact with the power feeding band 111. .

  The power feeding band 111 has a pair of support rods 112, and each support rod 112 is supported in the cylinder 113 movably in the centrifugal force acting direction (RCF) and in the opposite direction, and is processed by the biasing spring 114. It is biased toward the tank 12 side. Thereby, among the power supply members 110 of the treatment tank 21 that rotates in the direction of the arrow R, the power supply members 110 that pass through the centrifugal force acting direction (RCF) side sequentially come into contact with the power supply band 111 to supply power.

  The cylinder 113 that houses the support rod 112 and the urging spring 114 is fixed to a support bracket 118, and the support bracket 118 is supported by a support plate 23 as shown in FIG. It has become.

  As in this embodiment, the plating solution can be efficiently used by supplying power only to the power supply member 110 passing through the centrifugal force acting direction (RCF) side by revolution in the entire circumference of the rotating cylindrical main body 51. In addition to being able to be used effectively and effectively, compared to the first embodiment, it is possible to prevent plating deposition at unnecessary locations and to prevent quality degradation due to peeling of the deposited plating. It also saves energy costs.

  Further, in the present embodiment, since the shaft portion 110b of some of the power supply members 110 protrudes inward from the inner peripheral surface of the cylindrical main body 51, in the stirring action by the rotation of the processing tank 21, the inner side The protruding shaft portion 110b serves as a stirring protrusion, and the stirring function of the workpiece W is improved.

[Third Embodiment]
17 and 18 show a third embodiment of the present invention, which is a modification of the second embodiment. The cylindrical main body 51 is made of a non-conductive material such as a resin, and a plurality of vertically extending power supply rods (power supply members) 120 made of conductive metal are attached to the inner peripheral surface of the cylindrical main body 51. It has been. A large number of power supply rods 120 are arranged at predetermined intervals in the circumferential direction of the cylindrical main body 51. As shown in FIG. 18, an externally exposed portion 120a is formed at an intermediate portion in the vertical direction, and the externally exposed portion 120a. 17 is fitted into a mounting hole formed in the cylindrical main body 51, and protrudes outward from the outer peripheral surface of the cylindrical main body 51.

  The feeding band 121 and its supporting structure in an arc shape arranged in the centrifugal force acting direction (RCF) are the same as in the second embodiment.

  According to the embodiment, as in the second embodiment, the structure that feeds power only to the feeding rod 120 passing through the centrifugal force acting direction (RCF) side by revolution, out of the entire circumference of the cylindrical body 51 that rotates. Therefore, the plating solution can be used efficiently and effectively, plating deposition at unnecessary portions can be prevented, and deterioration of quality due to isolation of the deposited plating can be prevented. It also saves energy costs.

  Furthermore, since the inner peripheral surface of the cylindrical main body 51 is substantially uneven due to the large number of power supply rods 110 arranged in the cylindrical main body 51, the stirring action by the rotation of the treatment tank 21 is significantly improved.

[Fourth Embodiment]
FIG. 19 shows a fourth embodiment of the present invention, in which the energization is possible only in the range 56d on the centrifugal force acting direction (RCF) side of the entire circumference of the cylindrical anode 56, and the remaining range 56c is set as a non-conductor. Thus, the workpiece W accumulated on the centrifugal force acting direction (RCF) side can be efficiently plated. Other structures are the same as those of the first embodiment, for example.

[Fifth Embodiment]
FIG. 20 shows a fifth embodiment of the present invention. In the treatment tank 21 as in the first embodiment, the shape of the cylindrical main body 51, particularly the inner peripheral surface shape, is formed in a regular polygonal shape. It is. In the figure, the cylindrical main body 51 has a regular octagonal shape, but various polygonal shapes such as a regular pentagon and a regular hexagon can be employed.

  As described above, when the shape of the cylindrical main body 51 of the processing tank 21 is a regular polygonal shape, the work stirring performance due to the rotation of the processing tank 21 can be improved by the V shape between adjacent side surfaces.

[Sixth Embodiment]
FIG. 21 shows a sixth embodiment of the present invention, in which the shapes of the upper and lower lids 54 and 55 are improved in the treatment tank 21 as in the first embodiment. That is, holes 130 and 131 for discharging the processing liquid are formed in the upper and lower lids 54 and 55 and the rotation table 34.

  According to this embodiment, the processing solution such as the plating solution after use is released from the outer circumferential surface of the filters 52 and 53 in the radial direction, and also from above the upper filter 52 and below the lower filter 53. The plating solution discharge area increases. Thereby, for example, even if the filters 52 and 53 have a small pore diameter and the drainage amount is limited, a sufficient amount of drainage is possible.

[Seventh Embodiment]
FIG. 22 is a seventh embodiment of the present invention. As a drainage structure from the processing tank 21, instead of including the filter as in the first embodiment, the lower surface of the upper lid 54, Although not shown, a plurality of radial discharge grooves 140 are formed on the upper surface of the lower lid 55 as discharge paths.

  According to the embodiment, clogging is less likely to occur than when a filter for draining through complicated pores is provided, and even if clogging occurs, it can be easily disassembled and washed.

[Eighth Embodiment]
FIG. 23 shows an eighth embodiment of the present invention. As a drainage structure from the processing tank 21, a lower surface and a cylinder of the upper lid 54 are used instead of the filter as in the first embodiment. By sandwiching a plurality of thin plates 150 at intervals in the circumferential direction between the upper end flanges 51 a of the main body 51 and between the upper surface of the lower lid 55 and the lower end flange 51 a (not shown), A drainage passage is formed. Each thin plate 150 is formed in an annular shape like a washer, for example, and a mounting bolt 70 such as the upper lid 54 is inserted therethrough.

  According to this embodiment, as in the case of the seventh embodiment, clogging is less likely to occur than when a filter that drains through complicated pores is provided, and even if clogging occurs, it is easy to do. It can be disassembled and washed. Furthermore, the size of the drainage passage can be easily changed by changing the thickness of the thin plates 150 or the number of stacked sheets according to the size of the workpiece W.

  As a processing liquid discharge mechanism, a structure including upper and lower filters 52 and 54 as shown in FIG. 5 and FIG. 21 and the like, a structure forming a discharge groove 140 as shown in FIG. The structure of sandwiching the thin plate 150 as shown in FIG. 23 may be appropriately combined and used together.

[Ninth Embodiment]
FIG. 24 shows a ninth embodiment of the present invention. In the processing tank 21 as in the first embodiment, the structure in which the processing tank 21 is detachably attached to the rotation table 34 is different. . A so-called bayonet system is used to attach the treatment tank 21 to the rotation table 34.

  That is, a cylindrical peripheral wall 160 is formed on the upper surface of the rotating table 34, and a plurality of arc-shaped protrusions 161 are formed on the inner peripheral surface of the peripheral wall 160 at equal intervals in the circumferential direction. The arc-shaped projection 161 extends a certain length in the circumferential direction along the peripheral wall 160, and a stopper portion 161a that is bent downward is formed at one end in the circumferential direction. On the other hand, the lower lid 55 of the treatment tank 21 can be inserted from above between the circumferential directions of the protrusions 161, has an L-shaped cross section, and can be engaged with the protrusions 161 from below. A letter-shaped engagement protrusion 162 is formed.

  When the treatment tank 21 is fixed to the rotation table 34, the engaging protrusions 162 of the treatment tank 21 are inserted from above between the protrusions 161 of the rotation table 34, and the treatment tank 21 is rotated in the A direction to The outward horizontal portion of the mating protrusion 162 is engaged with the lower surface of the protrusion 161 of the rotation table 34 and is brought into contact with the stopper portion 161a.

  When removing the processing tank 21 from the autorotation table 34, an operation reverse to the above mounting operation is performed.

[Tenth embodiment]
FIG. 25 shows a tenth embodiment of the present invention. In the treatment tank 21 as in the first embodiment, the structure in which the treatment tank 21 is detachably attached to the rotation table 34 is different. . The lower end portion of the processing tank 21 is attached to the rotation table 34 in a so-called screw type.

  That is, the upper surface of the rotation table 34 is formed with a male screw portion 170 having the rotation axis O2 as an axis, and the lower surface of the lower lid 55 has a female screw hole (which can be screwed into the male screw portion 170). Hidden in the figure) is formed.

  When the treatment tank 21 is attached to the rotation table 34, the treatment tank 21 is rotated around the rotation axis O2 to screw the treatment tank 21 to the rotation table 34.

  When removing the processing tank 21 from the autorotation table 34, an operation reverse to the above attachment operation is performed.

[Eleventh embodiment]
FIG. 26 and FIG. 27 show an eleventh embodiment of the present invention. In the processing tank 21 as in the first embodiment, instead of providing a guide wheel as a mechanism for guiding the rotation of the processing tank 21. Further, a cylindrical guide projection 180 having a coaxial axis with the rotation axis O2 is formed on the upper surface of the central portion of the upper lid 54, and a guide arm 181 fixed to the revolution shaft 3 is fitted to the guide projection 180. The hole 181a is fitted. A retaining nut 182 is screwed onto the upper end portion of the guide protrusion 180, and the retaining arm 182 prevents the guide arm 181 from coming off.

  When the processing tank 21 is attached to and detached from the rotation table 34, the retaining nut 182 is removed and the guide arm 181 is removed from the guide protrusion 180 of the upper lid 54.

[Other embodiments]
(1) FIG. 28 shows a modification of the cylindrical main body 51. In each of the above embodiments, the cylindrical core of the cylindrical main body 51 is formed so as to coincide with the rotation axis O2. In the example, the cylindrical core C1 of the cylindrical main body 51 is inclined at a constant angle θ with respect to the rotation axis O2. When the cylindrical main body 51 of FIG. 28 is employed, the angle of the inner peripheral surface portion of the cylindrical main body 51 on which the work is pressed by the revolving centrifugal force during the processing operation is changed from −θ ° to + θ ° in accordance with the rotation. As the workpiece in the cylindrical main body 51 rotates, the upper part and the lower part flow with each other and the stirring is further promoted and uniform plating is performed. be able to.

(2) In each of the above embodiments, an insoluble member is used as the anode, but a soluble member can also be used.

(3) In each of the above embodiments, a single electrolytic plating apparatus is provided with a pair of processing tanks, but three or more processing tanks may be provided.

(4) In each of the above embodiments, the revolution shaft and the rotation shaft are arranged vertically, but the present invention is applied to a device in which the revolution shaft and the rotation shaft are arranged horizontally or inclined from the vertical. It is possible to apply

(5) The present invention is not limited to an electrolytic plating apparatus, and as described above, (a) electroless plating treatment; for example, immersion plating treatment, chemical plating treatment, (b) composite plating treatment, chemical composite Plating treatment, (c) electrodeposition coating treatment; for example, anion electrodeposition coating treatment, cationic electrodeposition coating treatment, (d) pretreatment; for example, degreasing treatment, electrolytic degreasing treatment, barrel polishing treatment, alkali dipping cleaning treatment, acid For surface treatment equipment for small articles intended for washing treatment, acid electrolysis treatment, chemical polishing treatment, electropolishing treatment, neutralization treatment, (e) post-treatment; for example, draining discoloration prevention treatment, water-soluble resin treatment, chromate treatment Applicable.

DESCRIPTION OF SYMBOLS 3 Revolving shaft 11 Revolution drive motor 12 Treatment liquid collection tank 13 Feed liquid pump (treatment liquid supply part)
DESCRIPTION OF SYMBOLS 14 Belt transmission mechanism 20 Discharge hole 21 Treatment tank 22 Revolving table 23 Support plate 24 Rotation drive motor 25 Liquid supply pipe 32 Rotation shaft 34 Rotation table 35 Rotation drive motor DC power supply 36 Electrolysis DC power supply 40 Treatment liquid path 41 Slip Ring 48 Guide wheel 51 Cylindrical body 52 Upper filter 53 Lower filter 54 Upper lid 55 Lower lid 56 Cylindrical anode 70 Bolt 71 Nut 73 Bolt 74 Nut 130, 131 Hole for discharging liquid 140 Discharge groove (discharge passage) Example)

Claims (14)

A revolving shaft, a revolving table fixed to the revolving shaft and rotating integrally with the revolving shaft, and arranged on the same circumference centering on the revolving shaft core and capable of rotating on the revolving table via the revolving shaft, respectively. A plurality of treatment tanks supported by each of the plurality of treatment tanks, each of the treatment tanks having an anode and a cathode portion, containing a treatment liquid and a small work, and rotating the plurality of treatment tanks around a revolution axis at the same time as rotating. In the surface treatment equipment for small items that surface-treats small workpieces in the treatment tank by rotating around the axis,
A revolution drive motor for rotationally driving the revolution shaft;
In addition to the revolution drive motor, a small surface treatment apparatus is provided with a rotation drive motor for rotating each treatment tank around a rotation axis for each treatment tank. The surface treatment apparatus for small articles according to claim 1,
Each processing tank connected to the processing liquid passage provided in the revolution shaft and the outlet of the processing liquid passage as a processing liquid path from the processing liquid supply unit disposed outside the processing tank to each processing tank. With a plurality of liquid supply pipes,
The inlet of the processing liquid passage is connected to the processing liquid supply unit via a rotary joint,
The outlet of each said liquid supply pipe | tube is a surface treatment apparatus for small articles connected to the anode support member arrange | positioned on the rotating shaft core of each processing tank. In the surface treatment apparatus for small articles according to claim 1 or 2,
Each of the rotation shafts is rotatably supported by the revolving table and includes a rotation table, and each processing table is detachably attached to each rotation table. In the surface treatment apparatus for small articles as described in any one of Claims 1 thru | or 3,
The treatment tank includes a cylindrical main body having both ends opened in the direction of the rotation axis, a porous filter having pores that close each open end of the cylindrical main body and allow a treatment liquid to pass through, and each porous body. A surface treatment apparatus for small articles, comprising: a lid for sandwiching a filter made between the end face of the cylindrical main body. In the surface treatment apparatus for small articles according to claim 4,
A surface treatment apparatus for small items, wherein a discharge hole for discharging a processing liquid is formed in each of the lids and the rotation table that supports the processing tank. In the surface treatment apparatus for small articles according to claim 4 or 5,
A surface treatment apparatus for small items, wherein an end portion of the inner peripheral surface of the cylindrical main body in the rotation axis direction is inclined outward toward the rotation axis direction. In the surface treatment apparatus for small articles as described in any one of Claims 1 thru | or 3,
The treatment tank includes a cylindrical main body that is open at both ends in the rotation axis direction, and a lid that closes each open end of the cylindrical main body,
The surface treatment apparatus for small articles provided with the discharge path which discharges | emits the process liquid in a process tank in a substantially orthogonal direction with the autorotation axis center on the internal peripheral surface of each cover body. In the accessory surface treatment apparatus according to any one of claims 4 to 7,
The surface treatment apparatus for small articles, wherein the cylindrical main body is formed in a cylindrical shape, and an inner peripheral surface of the cylindrical main body has an uneven shape. In the accessory surface treatment apparatus according to any one of claims 4 to 7,
The surface treatment apparatus for small articles, wherein the cylindrical main body is formed in a polygonal shape. In the surface treatment apparatus for small articles as described in any one of Claims 4 thru | or 9,
A surface treatment apparatus for small articles, wherein the cylindrical main body is formed of a conductive member and can be energized as a cathode portion on the entire periphery. In the surface treatment apparatus for small articles as described in any one of Claims 4 thru | or 9,
The cylindrical body is formed of a non-conductive member,
A surface treatment apparatus for small items, in which a large number of conductive material power supply members protrude from the inner peripheral surface of a cylindrical main body. The surface treatment apparatus for small articles according to claim 11,
Exposing each of the feeding members on the outer peripheral surface of the cylindrical body;
On the outer side of the revolving radial direction of the cylindrical body, a feeding band that can contact the outer exposed surface of the feeding member is arranged,
A small-sized surface treatment apparatus configured to energize only the power supply member on the outer side in the revolving radius direction of the cylindrical main body sequentially in contact with the power supply band by rotation of the treatment tank. The surface treatment apparatus for small articles according to claim 12,
A surface treatment apparatus for small articles, in which the anode disposed on the rotation axis side of the treatment tank is energized at a portion of the cylindrical body facing the outer side portion in the revolution radius direction. In the surface treatment apparatus for small articles according to any one of claims 1 to 13,
A surface treatment apparatus for small items, in which a plurality of guide wheels that are in contact with the outer peripheral surface of the treatment tank are arranged around the rotation axis at intervals around the treatment tank.

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