JP2008069461A - Barrel plating equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide barrel plating equipment where a stirring action by an electrode (cathode) at the tip part of each electrode lead wire is more remarkably exhibited, and the lead wire is made stable in a desired posture. <P>SOLUTION: Hollow support axes are horizontally fitted to a pair of holding members vertically parallel at prescribed intervals, and a barrel is freely rotatably fitted to both the support axes. A pair of lead wires each having an electrode at the edge part located in the barrel are freely rotatably held to each support axis. Each lead wire is composed of a round hard bar integrally having an axis part piercingly held to the axis core part of the corresponding support axis and a bending/lowering part formed in a state of continuously inclined with the tip lowered to the edge part projected into the barrel of the axis part, and each lead wire is held to the above support axis in such a manner that each electrode is held to a position leaned by a prescribed amount from the part directly below the rotary axis line of the barrel to the rotary direction of the barrel. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a barrel plating suitable for plating a small workpiece, for example, when plating the conductive piece of an object having a conductive piece attached to a part of a ceramic base having a length of 0.2 to 1 mm. It relates to the device.

For example, Patent Document 1 described later proposes a barrel plating apparatus configured as follows.
The barrel plating apparatus includes a barrel holding frame in which a pair of holding members that are parallel in a vertical state with a predetermined interval are connected by a plurality of connecting bars, and each holding member that is positioned on the same horizontal axis. Each hollow support shaft attached in a penetrating manner, a barrel rotatably attached to both the support shafts, a rotation transmission means for transmitting a rotational force to the barrel in the plating tank, and non-rotatable to each support shaft And a pair of lead wires having an electrode (cathode) at the end located in the barrel.
The lead wire is in a state where it is continuously inclined downward to the horizontal shaft portion of a predetermined length that is penetrated and held in the shaft center portion of the corresponding support shaft and the end portion of the shaft portion that protrudes into the barrel. It is comprised by the round bar which integrally has the formed bending-down part and the standing part bent upwards into the part which protruded to the side from the support shaft of the said shaft part.
The barrel is attached to the support shaft so as to be inclined by about 10 to 12 degrees in the vertical direction (vertical direction) with respect to the rotation axis.

The barrel plating apparatus throws a work group in which a dummy is mixed with an appropriate amount of work into the barrel, installs a barrel holding frame in a state where the barrel is submerged in the plating solution in the plating tank, and rotates the barrel The work is plated by energizing through the lead wires and electrodes.
Since the barrel is inclined by a predetermined amount in the direction perpendicular to the rotation axis, the work group reciprocates along the barrel within the barrel by the rotation of the barrel, and the tip of the bent-down portion of the lead wire. Agitated by contacting the directional part.
However, since the bent-down portion of each lead wire is inclined directly downward with respect to the rotation axis, and the electrode is positioned immediately below the rotation axis, the stirring action by the bent-down portion and the electrode is small.
In addition, since each lead wire is integrally formed with a rising portion bent upward to a portion protruding from the support shaft of the horizontal shaft portion, it is very difficult to replace when the insulation coating is worn out. It was.
JP 2002-256500 A

The problem to be solved by the present invention lies in the above points, and an object of the present invention is to provide a barrel plating apparatus in which the agitating action by the tip portion of the lead wire and the electrode (cathode) is more exerted.
Another object of the present invention is to provide a barrel plating apparatus in which electrode lead wires can be easily replaced.
Another object of the present invention is to provide a barrel plating apparatus capable of stably holding an electrode lead wire that can be easily replaced in a fixed posture.

The barrel plating apparatus according to the present invention is configured as follows to solve the above-described problems.
That is, a barrel holding frame in which a pair of holding members parallel in a vertical state with a predetermined interval are connected by a plurality of connecting bars, and attached to each holding member in a penetrating manner while being positioned on the same horizontal axis. Each of the hollow support shafts, a barrel rotatably attached to the both support shafts, a pair of lead wires that are non-rotatably attached to the support shafts and have electrodes at the ends located in the barrels; With
Each lead wire is continuously lowered to a shaft portion of a horizontal predetermined length that is watertightly penetrated and held in the shaft center portion of the corresponding support shaft, and an end portion that enters the barrel of the shaft portion. It consists of a hard round bar that integrally has a bent-down part formed in an inclined state,
A current-carrying member is connected to each of the connection portions formed on the end portions protruding outward from the corresponding support shaft of each shaft portion, and the connection portion between the connection portion and the current-carrying member is covered with a watertight insulating cover. ,
A non-circular portion having a non-circular cross section is formed adjacent to the connection portion at a portion of each shaft portion protruding outward from the tubular shaft, and the non-circular portion penetrates and corresponds to the non-circular portion. A restricting plate is detachably attached so as to rotate integrally with the shaft portion of the lead wire to be operated, and the restricting plate is positioned at a position where the corresponding lead wire electrode is deviated by a predetermined amount in the barrel rotation direction from directly below the rotation axis of the barrel. The main feature is that it is fixed to a corresponding energizing member or support shaft by a screw in a state of keeping.

  According to the barrel plating apparatus according to the present invention, the work group including the dummy in the barrel is inclined upward in the rotation direction in the barrel as the barrel rotates, and the work including the dummy is the surface of the work group. The electrode of each lead wire is kept at a position deviated by a predetermined amount in the barrel rotation direction from directly below the rotation axis in the barrel as described above. Since the workpiece is slightly opposite to the moving direction (the collision angle of the workpiece with respect to the electrode is 90 ° or close to it), the contact efficiency of the workpiece with the electrode is improved, and the tip of the lead wire and the electrode (cathode) are correspondingly increased. In addition, the agitating action due to) is further exerted, and the workpiece is more evenly contacted with the electrode.

  According to the barrel plating apparatus according to the present invention, each lead wire has a horizontal shaft portion of a predetermined length that is watertightly penetrated and held in the shaft center portion of the corresponding support shaft, and into the barrel of the shaft portion. It consists of a hard round bar that integrally has a bent-down part formed in a state where it slopes downward and slopes continuously to the end that has entered, and is formed on the end part that protrudes outward from the corresponding support shaft of each of the shaft parts. Since the current-carrying members are connected to the respective connection portions, the lead wires can be easily replaced by removing the connection portions from the current-carrying members and pulling out the lead wires toward the inside of the barrel.

  According to the barrel plating apparatus according to the present invention, a non-circular portion having a non-circular cross section is formed adjacent to the connection portion at a portion of the shaft portion of each lead wire that protrudes outward from the support shaft. A restriction plate is removably attached to the circular portion so that the non-circular portion penetrates and rotates integrally with the shaft portion of the corresponding lead wire, and the restriction plate is fixed to the corresponding energizing member or the support shaft with a screw. Therefore, even when the screw is loosened or the like, the lead wire receives a load and the shaft portion does not rotate, so that the lead wire can stably maintain a non-rotating fixed posture.

The best embodiment of the mounting structure of the barrel plating apparatus according to the present invention will be described below with reference to the drawings.
FIG. 1 is a partially omitted front view showing an embodiment of a barrel plating apparatus according to the present invention, FIG. 2 is an enlarged cross-sectional view along arrow AA of FIG. 1 in a state where a barrel is omitted, and FIG. 3 is an electrode lead wire FIG. 4 is a partially enlarged sectional view showing in detail a mounting structure portion of one (left side) electrode lead wire of the barrel plating apparatus of FIG. 1, and FIG. 5 is the other side (right side) of the barrel plating apparatus of FIG. 6) is a partially enlarged sectional view showing in detail the electrode lead wire mounting structure portion, FIG. 6 is a partially enlarged exploded sectional view of the bearing portion in the electrode lead wire mounting structure portion of FIG. 4, and FIG. FIG. 8 is a front view of a regulating plate for locking the lead wire, and FIG. 9 is a side view of the right lead wire of FIG. 1 as viewed from the left.

As shown in FIGS. 1 and 2, the barrel plating apparatus includes a barrel holding frame 2 in which support members 20 and 20 that are opposed to each other at a predetermined interval are connected by several connecting bars 22. Is accommodated in the plating tank 7. An upper support plate 21 is attached to each support member 20 at the top.
A hollow support shaft 4 is attached to the same level of the lower portion of each support member 20 so as to penetrate from the outside. Both ends of the barrel 3 are rotatably attached to the both support shafts 4, and lead wires 10 of the electrodes (cathodes) 1 are respectively inserted in a non-rotatable and watertight state.

The barrel 3 includes a hollow body 30 in which a porous plate (not shown) made of hard synthetic resin in which a large number of small holes are densely combined in a polygonal shape (in this embodiment, a hexagon), and a similar porous plate. It is made of a material and is composed of end plates 31 and 31 fixed to both ends of the body portion 30 so as to close the both ends.
A lid (not shown) made of a porous plate made of the same material is attached to one side surface of the body portion 30 so that it can be opened and closed. A mesh (not shown) of a small mesh is fixed inside each side surface of the trunk portion 30 including the lid.

A plate-shaped energization member 5 provided in a state of depending on the side of each support member 20 is connected to the outer end portion of each lead wire 10 protruding outward from the inside of the corresponding support member 20. Both connecting portions are covered in a watertight manner.
Each energizing member 5 is a portion excluding the upper portion so that at least a portion of the plating bath 7 below the liquid level b in the plating bath 7 is insulated from the plating solution in a state where the barrel holding frame 2 is accommodated in the plating bath. Are each covered with an insulating member 56.
An upper portion of each energizing member 5 is connected to an energizing plate 57 attached to a side portion of the upper support plate 21 of the barrel holding frame 2 so as to exhibit a T shape, and the energizing plate 57, the energizing member 5, and the lead wire 10. A direct current is supplied to each of the electrodes 1 through.

Reference numeral 6 denotes a rotation transmission means for transmitting the rotation of a motor (not shown) to the barrel 3. The rotation shaft 64 is rotatably attached so as to penetrate each upper support plate 21, and a gear fixed to one end of the rotation shaft. 65 and a gear train.
The gear train is rotatably attached to the gear 63 fixed to the rotating shaft 64, the intermediate gears 62 and 61 that are rotatably attached to the inside of one of the support members (left side in FIG. 1), and the support shaft 4. And a terminal gear 60 attached so as to rotate integrally with one end plate 31 of the barrel 3 via a boss-like member.
The material of each gear 60 to 64 is a hard synthetic resin.

Bearing members 64a are rotatably attached to the rotary shaft 64 so as to be located on both sides of the upper portion of the barrel holding frame 2, and on the other hand, the upper and lower edges of the plating tank 7 receive the bearing members 64a, respectively. Tools 70 are attached.
Accordingly, when the rotary shaft 64 is placed on both upper edges of the plating tank 7 in a state in which the bearing members 64a and 64a are guided by the corresponding receivers 70 and 70, the barrel holding frame 2 is moved to the plating tank 7. The barrel 3 which is housed in a suspended shape in an appropriate posture inside and is held by the barrel holding frame 2 is in a state where an appropriate amount is submerged in the plating solution.

Mounting plates 24 and 24 are vertically mounted on the opposite sides of the upper support plates 21 and 21 via a plurality of connecting bars 23, respectively, and the handle bars are parallel to each mounting plate 24 at the same level. 25 and 25 are attached horizontally.
When the barrel holding frame 2 is moved to another place or moved from another place to the plating tank 7 shown in the figure, a hook of a transfer device (not shown) is hooked on each handle bar 25 and the barrel holding frame 2 is lifted up. It is configured to move.

The barrel 3 is inclined by a predetermined angle θ4 (FIG. 1) in the vertical direction and the predetermined angle in the horizontal direction (in plan view) with respect to the horizontal rotation axis a shown in FIG. It is attached to each said support shaft 4 in the state to form. By attaching the barrels 3 to the respective support shafts 4 in this way, preferable movement and stirring of the internal work accompanying the rotation of the barrels 3 is promoted.
The amount of vertical inclination and the angle in the horizontal direction of the body 30 with respect to the rotation axis a are set in accordance with the capacity of the barrel 3, the size of the work including the dummy, the amount charged into the barrel 3, and other specific conditions. However, as a general guideline, it is preferable to set both the vertical inclination and the horizontal angle (inclination) within a range of 15 ° or less with respect to the rotation axis a. This is because when the tilt amount of the barrel 3 is larger than the angle, the movement and stirring of the plating object thrown into the barrel 3 are not promoted and the rotation of the barrel is not smooth.
In this embodiment, the barrel 30 of the barrel 3 is tilted about 12 ° in both the vertical and horizontal directions with respect to the rotation axis a.

Configuration of Lead Wire of Electrode As shown in FIG. 3, the lead wire 10 is a hard round bar having good conductivity such as a copper bar, and the shaft portion 100 having a predetermined length and the shaft portion 100 are maintained in a horizontal posture. It is formed integrally with a bent-down portion 101 that sometimes has a tip-down shape due to gravity.
A connecting portion 13 made of a small-diameter male screw is integrally formed on the base end side of the shaft portion 100 via a non-circular portion 14 having a non-circular cross section, and a connecting piece having good conductivity is provided on the distal end side of the bent-down portion 101. An electrode 1 made of copper or the like is connected through 11. The lead wire 10 is covered with an insulating layer 104 such as a plastic film at portions other than the bare portion 103 on the proximal end side including the connecting portion 13 and the bare portion 102 on the distal end side.
A distal end portion including the bare portion 102 of the bent-down portion 101 is fixed in an embedded state (caulking stop) on the proximal end side of the connecting piece 11, and the distal end of the connecting piece 11 formed on a gently inclined conical surface is formed. The part is formed with a small-diameter male screw part 110 at the center. A portion of the connecting piece 11 excluding the male screw 110 is covered with an insulating layer 111 such as plastic, and the male screw portion 110 is screwed with a cap nut-shaped electrode 1. Is pressed against the insulating layer 111 at the tip of the connecting piece 11.
The connecting piece 11 and the electrode 1 are pressed by a conical surface that is convex in the distal direction, and the outer diameter of the electrode is made smaller than the outer diameter of the connecting piece 11 including the insulating layer 111. It is possible to prevent plating scraps and small workpieces from adhering to the outer peripheral portion of the contact portion with the electrode 1, thereby extending the life of the electrode 1.

As described above, the bend-down portion 101 is bent downward with respect to the shaft portion 100 in a state where the shaft portion 100 is kept in a horizontal state, but the bending angle of the bend-down portion 101 with respect to the shaft portion 100 ( Strictly speaking, the angle formed by the line connecting the center of the bending start portion that is the boundary between the shaft portion 100 and the bending-down portion 101 and the center tip of the electrode 1 and the axis of the shaft portion 100) θ1 is the barrel 3 This varies depending on the cross-sectional area and volume of the body portion 30, the length of the shaft portion 100, the amount of the workpiece (including this when mixing dummy), and other conditions. As a general guideline, the bending angle θ1 is preferably about 25 to 60 °.
The electrode 1 is attached to the tip end portion of the bent-down portion 101 of the lead wire 10 via a connecting piece 11 whose periphery is covered with an insulating layer 111 so that the electrode 1 can be replaced when it is heavily consumed. However, the bare portion 102 at the tip of the lead wire 10 can be used as an electrode.

4. Detail of electrode lead wire mounting portion As shown in FIGS. 4 and 5, at the positions near the lower portions of the support members 20 and 20, there are hollow support shafts 4 and 4 made of hard synthetic resin, and the mutual axis lines are horizontal. It is attached so as to face the support member 20 at right angles from the outside.
Each support shaft 4 includes a shaft main body 40 having a flange 43 at one end, and a connecting portion cover 41 partially embedded in the shaft main body 40 from the outside. The lead wire 10 is penetratingly held in a watertight manner, and a deep dish-shaped housing portion 42 is formed at an outer end portion of the connecting portion cover. The shaft main body 40 and the connecting portion cover 41 are watertight by a seal ring 48 interposed therebetween.
Each support shaft 4 is fixed to the corresponding holding member 20 by attaching the flange 43 of each shaft main body 40 to the holding member 20 with an appropriate number of screws 44.
The support shaft 4 on one side (FIG. 4) is longer than the support shaft 4 on the other side (FIG. 5) in order to attach the terminal gear 60 of the rotation transmitting means 6.
The hollow portion 400 of each support shaft 4 includes a large inner diameter portion 401 that is a hollow portion of the shaft main body 40 and a small inner diameter portion 411 that is a hollow portion of the connecting portion cover 41. The large inner diameter portion 401 is described later. The outer diameter of the collar 12 is substantially matched, and the small inner diameter portion 411 is substantially matched with the outer diameter of the shaft portion 110 of the lead wire 10.

Each end plate 31 of the barrel 3 includes a main body 310 that forms an outer ring and a boss-shaped member 311 that forms a bearing portion of the end plate. The boss-shaped member 311 of each end plate 31 corresponds to a corresponding shaft main body 40. It is rotatably attached to the outer periphery of the tip portion via a sheet-like bearing 49 made of a low friction member.
A housing 33 that also serves as a spacer and covers the boss-like member 311 is attached to the main body 310 of each end plate 31. A terminal gear 60 is attached to the boss-like member 311 and the housing portion 33 of one end plate 31 (FIG. 4) so as to rotate integrally with the end plate 31 and not interfere with the support shaft 4.

Each end plate 31 is formed with an insertion hole 312 in the boss-like member 311, and a bush 32 is fixedly inserted into the insertion hole 312. The material of the bush 32 is a polyacetal (for example, “Duracon” manufactured by Polyplastics Co., Ltd.) or other low friction member having a relatively low coefficient of thermal expansion.
In this embodiment, as shown in an exploded view in FIG. 6, a predetermined angular interval (90 ° interval in this embodiment) is slid along the axial direction on a portion of the cylindrical bush 32 facing outward (toward the support shaft 4). A split 320 is formed, the inner diameter of the slit forming portion is slightly smaller than the other portions, and a protrusion 321 is formed in a flange shape on the outer periphery of the slit forming portion. On the other hand, a ring-shaped groove 313 is formed on the inner peripheral surface of the insertion hole 312 so as to correspond to the protrusion 321. The bush 32 configured as described above is pushed into the insertion hole 312 from the inner side, and the projection 321 of the bush 32 is engaged with the groove 313 so that the bush 32 is retained in the insertion hole 312 in a retaining manner. I am letting.

The shaft portion 100 of the lead wire 10 is inserted into the hollow portion 400 of the support shaft 4 through the bush 32 of the end plate 31 so that the connection portion 13 protrudes into the housing portion 42 of the support shaft 4. A part of the shaft portion 100 is inserted in close contact with the small inner diameter portion 411 of the support shaft 4, and the space between the shaft portion 100 and the small inner diameter portion 411 of the support shaft 4 is watertight by a seal ring 45 interposed therebetween. It is kept in.
In this embodiment, the collar 12 is fixedly attached to a portion of the shaft portion 100 corresponding to the bush 32, and the inner peripheral surface of the bush 32 slides relative to the outer peripheral surface of the collar 12 when the barrel rotates. is doing. The material of the collar 12 is an ultra-high-density synthetic polymer substance (for example, ultra-high-density polyethylene) or other low friction member, and is a member having a relatively low coefficient of thermal expansion.
In this embodiment, as shown in an exploded view in FIG. 6, the cylindrical collar 12 is formed with slits 120 at predetermined angular intervals (in this embodiment, 90 ° intervals), and the inner diameter of this slit forming portion is set. The diameter is slightly larger than the inner diameter of the other portion, and a protrusion 121 is formed in a flange shape on the outer periphery of the slit forming portion. On the other hand, a ring-shaped groove 402 corresponding to the protrusion 121 is formed on the inner peripheral surface of the tip end portion of the large inner diameter portion 401 of the support shaft 4.
The collar 12 configured as described above is pushed into the large inner diameter portion 401 of the support shaft 4 together with the lead wire 10 and the projection 121 of the collar 12 is locked in the groove 402, so that the collar 12 is The inner diameter portion 401 is held in a retaining shape.

As described above, the non-circular portion 14 is formed on the bare portion 103 of the shaft portion 100 of each electrode 1, and the regulation plate 46 is attached to each non-circular portion 14 so as to rotate integrally with the shaft portion 100. It has been.
The restriction plate 46 is maintained in a desired posture, and the restriction plate 46 is fixed to a lower end portion of an energization member 5 described later by a screw 47 to restrict the shaft portion 100 of the lead wire 10 from rotating. At the same time, the restricting plate 46 has the rotation axis line in a cross section in which the electrode 1 is positioned lower than the rotation axis a by an appropriate amount as shown in FIG. 1 and the bent down part 101 is orthogonal to the shaft part 100 as shown in FIG. The position of the electrode 1 is regulated so as to be inclined by a predetermined angle θ5 in the rotation direction of the barrel 3 with respect to a.
In such an installation state of the lead wires 10, the electrodes 1, 1 are in close proximity to each other at an average central position in the length direction of the barrel 3 as shown in FIG. 1.

In this embodiment, each regulating plate 46 is formed in a fan shape as shown in FIG. 8, and a long hole 461 that substantially matches the non-circular portion 14 is formed in the center of the fan shape. Yes. Screw-tapped restriction holes 462 and 463 are formed at regular angular intervals in the upper portions of both sides of the fan-shaped center line d of the restriction plate 46.
The restriction plate 46 is attached to the non-circular portion 14 in a state where the non-circular portion 14 is passed through the long hole 461 of the restriction plate 46, and the restriction hole selected by selecting one of the restriction holes 462 and 463 is non-circular. 9 by screwing a screw screw 47 into a selected restricting hole 462 or 463 through a guide hole 52 formed at a lower portion of the energizing member 5 to be described later. An inclination angle θ5 of 101 is set.

In this embodiment, as shown in FIG. 8, each line e connecting the center of the long hole 461 (fan-shaped rotation center) in the restriction plate 46 and the center of each restriction hole 462 closest to the center line d, and the center The angle θ2 formed by the line d is set to 30 °. In addition, an angle θ3 formed by each line f connecting the center of the long hole 461 and the center of each other restriction hole 463 and each line e adjacent thereto is set to 15 °.
Therefore, the inclination angle θ5 of the bent-down portion 101 in FIG. 9 can be selected and set to 30 ° or 45 °.

The appropriate level position of the electrode 1 as described above, the appropriate inclination degree θ5 in the barrel rotation direction of the bent-down portion 101 in the cross section orthogonal to the shaft portion 100, the cross-sectional volume of the barrel portion 30 of the barrel 3, It depends on the size and amount of work, the number of rotations of the barrel 3 and other specific conditions.
As shown in FIG. 9, the upper surface of the small work group c including the dummy piece placed in the barrel 3 is rotated in the central direction in the longitudinal direction of the barrel 3 along with the clockwise rotation of the barrel 3. In this state, the workpiece group moves as shown by the arrow in FIG. Therefore, it is preferable to select the level of the electrode 1 and the inclination angle θ5 in FIG. 9 so that the workpiece moving in the downward direction contacts the electrode 1 as evenly as possible when the workpiece group c moves.
As a temporary guide, it is preferable to set the inclination angle θ5 of the bent-down portion 101 of the lead wire 10 in the barrel rotation direction within a range of 25 to 50 °.

As shown in FIG. 7, at the lower end portion of the energizing member 5 from which the insulating member 56 has been cut off, a notch-shaped guide portion 50 leading to the lower end and a spot facing so as to be positioned around the upper end portion of the guide portion 50. A seat portion 51 is formed.
As shown in FIGS. 4 and 5, the lower end portion of the energizing member 5 is inserted into the housing portion 42 in a watertight manner from above, and the connecting portion 13 of the lead wire 10 is guided and protruded into the guide portion 50, so that the seat The connection part 13 is energized in a state where the contact resistance is electrically reduced by screwing a nut 53 to the connection part 13 via a conductive contact plate 54 and a spring washer 55 made of brass or copper guided by the part 51. The lower end part of the member 5 is connected.

  A female threaded portion is formed on the inner peripheral surface of the distal end portion of the housing portion 42, and by screwing a hard synthetic resin screw cap 8 formed with a male threaded portion into the housing portion 42 via a seal ring 80, A connecting portion between the connecting portion 13 of the lead wire 10 and the energizing member 5 is kept in a watertight state insulated from other portions.

According to the barrel plating apparatus, an appropriate amount of work is put into the barrel 3 together with a dummy, the lid is closed, and the barrel holding frame 2 is set so that the barrel 3 sinks below the liquid level b of the plating solution as shown in FIG. Is set in the plating tank 7, and the work is plated by energizing the electrode 1 while rotating the barrel 3 at a reduced speed through the rotation transmitting means 6.
The workpiece group including the dummy in the barrel 3 is in a state of being inclined in the forward direction in the rotation direction as the barrel 3 rotates (FIG. 9), and the workpiece including the dummy is inclined to the surface portion of the workpiece group. When moving along the opposite direction of the rotation direction, the electrode 1 of the bent-down portion of each lead wire 10 is kept at a position deviated by a predetermined amount in the barrel rotation direction from directly below the rotation axis in the barrel as described above. Thus, the workpiece is slightly opposed to the moving direction (the collision angle of the workpiece with respect to the electrode is 90 ° or close to it), so that the contact efficiency of the workpiece with the electrode 1 is improved, and the stirring action by the electrode 1 is increased accordingly. Is more effective.
At the same time, the contact between the workpiece and the electrode 1 becomes more uniform.

  Each lead wire 10 continues to a shaft portion 100 of a predetermined horizontal length that is penetrating and held in a watertight manner to the shaft center portion of the corresponding support shaft 4, and an end portion that projects into the barrel 3 of the shaft portion 100. And a connecting portion formed of a hard round bar integrally formed with a bent-down portion 101 formed so as to be inclined downward, and formed on an end portion of each shaft portion 100 protruding outward from the corresponding support shaft 4. Since the current-carrying member 5 is connected to each of the members 13, the lead wire 10 can be easily replaced by removing the connecting portion from the current-carrying member 5 and pulling out the lead wire 10 toward the inner side of the barrel 3.

  A non-circular portion 14 having a non-circular cross section is formed adjacent to the connection portion 13 at a portion of the shaft portion 100 of each lead wire 10 that protrudes outward from the support shaft 4. A restricting plate 46 is attached so that the non-circular portion 14 penetrates and rotates integrally with the shaft portion 100 of the corresponding lead wire 10, and the restricting plate 46 is fixed to the corresponding energizing member or support shaft by a screw 47. Therefore, even when the screw 47 is loosened, the lead wire 10 is not loaded and the shaft portion 100 does not rotate, so that the lead wire 10 can stably maintain a non-rotating fixed posture.

  The barrel 3 is attached to each of the support shafts 4 so that the body 30 forms a predetermined angle in the vertical direction and the horizontal direction with respect to the horizontal rotation axis a shown in FIG. As a result, the internal workpiece group reciprocally moves along the trunk portion 30 in a complicated manner, so that stirring of the workpiece is further promoted.

  The restriction plate 46 is formed with a plurality of screw holes or screw holes 462 and 463 at predetermined angular intervals θ2 and θ3 from the center of the through portion of the non-circular portion 14, and any one of the restriction holes 462 and 463 is formed. And the restriction plate 46 is fixed to the energizing member 5 with a screw 47, so that the amount of deviation in the rotational direction from directly below the rotation axis of the electrode 1 in the barrel 3 is restricted. It can be selected according to the number of holes.

Since the collar 12 made of a low friction member is attached to the lead wire 10 in the bearing portion where the lead wire 10 passes through the end plate 31 of the barrel 3, the insulating layer 104 of the lead wire 10 in that portion can be protected.
In addition, since the collar 12 is a separate member from the insulating layer 104 of the lead wire 10, a material having good workability and a low coefficient of thermal expansion is selected for the collar, so that the size of the gap of the bearing portion is reduced. , It can be easily controlled so that a small work or a part thereof does not enter.
Since the collar 12 is a separate member from the lead wire 10, it can be easily replaced.

  A slit 120 along the axial direction is formed in a portion of the collar 12 facing the barrel, and an inner diameter of the slit forming portion is formed to be slightly larger than other portions. The collar 12 is formed at the tip of the support shaft 4. Since the collar 12 is pushed into the large inner diameter portion 401 in a retaining manner, the collar 12 is attached to the lead wire 10 and the tip end portion of the support shaft 4, and the mounting state (fixed state) of the collar 12 becomes more stable.

Since the bush 32 is attached to the insertion hole 312 of the end plate 31 of the barrel 3, the insertion hole 312 is not worn, and the bush 32, which is a bearing portion on the end plate 31 side, is worn to allow a gap with the collar 12. In the case of enlargement as described above, the bearing portion can be easily repaired.
The bush 32 is formed with a slit 320 at an outward portion of the barrel. The inner diameter of the slit forming portion is slightly larger than the other portion, and the bush 32 is pulled out to the insertion hole 312 on the end plate 31 side. Since the bushing 32 is pushed in, it is easy to attach the bush 32 and the attached state is more stable.

Other Embodiments In the above embodiment, the bush 32 is attached to the insertion hole 312 of the end plate 31 of the barrel 3, but this bush 32 is omitted, and the inner peripheral surface of the insertion hole 312 is the collar 12 when the barrel rotates. It can comprise so that it may slide with respect to an outer peripheral surface.
In the above-described embodiment, the restriction plate 46 that restricts the attitude of the lead wire 10 is fixed to the energizing member 5 with the screw 47, but the restriction plate 46 is fixed to the support shaft 4 (the connecting portion cover 41) with the same screw 47. Even if configured, the same effect can be obtained.
In the embodiment, the bent-down portion 101 of the lead wire 10 is formed in an inclined linear shape, but the bent-down portion 101 is formed in an arc shape or a polygonal shape so as to form a convex shape obliquely upward or obliquely downward. It doesn't matter.

1 is a partially omitted front view showing an embodiment of a barrel plating apparatus to which a first embodiment of an electrode lead wire mounting structure according to the present invention is applied. It is an expanded sectional view which follows the arrow AA of FIG. 1 in the state which abbreviate | omitted the barrel. It is a partially broken front view of an electrode lead wire. FIG. 2 is a partial enlarged cross-sectional view showing in detail a mounting structure of one (left side) electrode lead wire of the barrel plating apparatus of FIG. 1. FIG. 2 is a partially enlarged cross-sectional view showing in detail the attachment structure of the other (right side) electrode lead wire of the barrel plating apparatus of FIG. 1. It is a partial expansion exploded sectional view of the bearing part of the attachment structure of an electrode lead wire. It is a front view of the lower end part of an electricity supply member. It is a front view of the control board which locks a lead wire. It is the side view which looked at the lead wire of the right side of FIG. 1 from the left direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrode 10 Lead wire 100 Shaft part 101 Bending part 102,103 Bare part 104 Insulating layer 11 Connection piece 110 Bolt part 111 Insulating layer 12 Collar 120 Slide 121 Projection 13 Connection part 14 Non-circular part 2 Barrel holding frame 20 Support member 21 Upper holding plates 22 and 23 Connecting bar 24 Mounting plate 25 Handle bar 3 Barrel 30 Body 31 End plate 310 End plate body 311 Boss-shaped member 312 Insertion hole 313 Groove 32 Bush 33 Housing 4 Support shaft 40 Shaft body 400 Hollow portion 401 Large inner diameter portion 402 Groove 41 Connecting portion cover 411 Small inner diameter portion 42 Housing portion 43 鍔 44, 47 Screw 45, 48 Seal ring 46 Restriction plate 461 Long hole 462, 463 Restriction hole 49 Bearing 5 Current supply member 50 Guide portion 51 Seat portion 52 Guide hole 53 Nut 54 Conductive contact plate 55 Washer 56 Insulating member 57 Energizing pre Preparative 6 rotation transmitting means 60 end gears 61 and 62 intermediate gear 63 and 65 the gear 64 rotates shaft 64a bearing member 7 plating layer 70 receptacle 8 screw cap 80 sealing ring

Claims (3)

A barrel holding frame in which a pair of holding members parallel to each other in a vertical state at a predetermined interval are connected by a plurality of connecting bars, and attached to each holding member in a penetrating manner in a state of being positioned on the same horizontal axis. Each hollow support shaft, a barrel that is rotatably attached to the both support shafts, and a pair of lead wires that are non-rotatably attached to the support shafts and have electrodes at the ends located in the barrel. ,
Each lead wire is continuously lowered to a shaft portion of a horizontal predetermined length that is watertightly penetrated and held in the shaft center portion of the corresponding support shaft, and an end portion that enters the barrel of the shaft portion. It consists of a hard round bar that integrally has a bent-down part formed in an inclined state,
A current-carrying member is connected to each of the connection portions formed on the end portions protruding outward from the corresponding support shaft of each shaft portion, and the connection portion between the connection portion and the current-carrying member is covered with a watertight insulating cover. ,
A non-circular portion having a non-circular cross section is formed adjacent to the connection portion at a portion of each shaft portion protruding outward from the tubular shaft, and the non-circular portion penetrates and corresponds to the non-circular portion. A restriction plate is attached so as to rotate integrally with the shaft portion of the lead wire, and the restriction plate keeps the electrode of the corresponding lead wire at a position deviated by a predetermined amount in the barrel rotation direction from directly below the rotation axis of the barrel. It is fixed to the corresponding energizing member or support shaft by screws,
A barrel plating apparatus characterized by that. The restriction plate is formed with a plurality of restriction holes including screw holes or screw-through holes at a predetermined angular interval from the center of the through portion of the non-circular part, and the restriction plate is selected by selecting any restriction hole. The barrel plating apparatus according to claim 1, wherein the barrel plating apparatus is configured to be fixed to the energizing member or the support shaft with a screw. 3. The barrel plating apparatus according to claim 1, wherein the barrel is attached to each of the support shafts with a body portion inclined at a predetermined angle in a vertical direction and a horizontal direction with respect to a rotation axis.

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