JP4914706B2 - Barrel plating equipment - Google Patents

Description

  The present invention relates to a barrel plating apparatus used when forming a plating film on a chip-like electronic component or other various workpieces, and more specifically, a barrel capable of forming a plating film having a uniform thickness on a plurality of workpieces. The present invention relates to a plating apparatus.

  A barrel plating apparatus is generally used when forming a plating film on the external electrode of a chip-shaped electronic component. The barrel plating apparatus includes a machine frame, a rotating barrel that accommodates a workpiece to be plated, a driving device that rotationally drives the rotating barrel, a support shaft that rotatably supports the rotating barrel, and a support shaft. It is common to have electrode means that is fixed and in contact with a part of the workpiece to bring the workpiece to a negative potential.

  Patent Document 1 proposes a barrel plating apparatus 1 in which a support shaft 6 is attached to a side plate 9 of a machine frame via a boss 8 as shown in FIG. A work W such as a chip-shaped electronic component is inserted into the rotating barrel 2 together with conductive dummy particles, and the rotating barrel 2 is rotated while being immersed in a plating solution in a plating tank (not shown) to stir the rotating barrel 2. While applying a predetermined voltage between the anode disposed in the plating tank and the cathode 7 fixed to the support shaft 6 and disposed at a predetermined position in the rotating barrel 2, A plating film is formed, for example, on the surface of an external electrode of a workpiece W such as a chip-like electronic component connected to the electrode (cathode) 7 through the conductive dummy particles.

Japanese Patent Laid-Open No. 08-253895

In the conventional barrel plating apparatus 1, bushes 5 ′ and 5 ′ are disposed at the centers of one and other side walls 3 a and 3 b of the rotating barrel 2, and the bush 5 ′ is fixed to the side plate 9 of the machine frame. The shaft support portion of the boss 8 is inserted, and the rotary barrel 2 rotates around the support shaft 6 indirectly via the boss 8. The rotation of the support shaft 6 is restricted so that an electrode (cathode) 7 fixed to the support shaft 6 and disposed in the rotary barrel 2 is disposed at a predetermined position in the workpiece W. It is common. However, it is difficult to firmly fix the support shaft 6 to the boss and / or the side plate 9 so that the assembly is easy and the rotation of the support shaft 6 is restricted.
On the other hand, the side plate 9 of the machine frame is generally made of an acrylic resin, a vinyl chloride resin, or other insulating resin, and is likely to be warped or distorted due to a temperature history associated with use, a dimensional error of each member, or the like. When the side plate 9 is warped or distorted, as shown in FIG. 10, the interval between the side plates 9 is widened and the rotary barrel 2 is displaced in the direction of the support shaft 6, so that the rotary barrel 2 and the support shaft 6 is relatively displaced from the electrode (cathode) 7 fixed in the rotary barrel 2 and disposed in the rotary barrel 2. In this way, a chip shape is formed using the barrel plating apparatus 1 in which a relative displacement occurs between the rotating barrel 2 and the electrode (cathode) 7 fixed to the support shaft 6 and disposed in the rotating barrel. When barrel plating is performed on a work W such as an electronic component, there is a problem that the film thickness of the plating film formed on the surface of each work W tends to vary.

  An object of the present invention is to provide a barrel plating apparatus capable of solving the above-described problems and forming a plating film having a uniform thickness on a plurality of workpieces.

In order to achieve the above object, the barrel plating apparatus of the present invention comprises:
(1) A support member facing each other at a predetermined interval, a fixed shaft that is fixedly disposed on the support member, and that protrudes inward from the distal end portion thereof, and both ends thereof are rotatably supported by the distal end portion of the fixed shaft. A barrel plating apparatus comprising: a rotating barrel; and an electrode disposed in the rotating barrel and locked at both ends so as to be restrained from rotating by the fixed shaft. And at least one contact point disposed so as to protrude from each other, and caps are fixed to substantially the center of the side walls at both ends in the axial direction of the rotating barrel. The tip of the fixed shaft is inserted, and the position of the side surface in the vicinity of the axial end of the center rod of the electrode in the rotating barrel is regulated by the opposing surface of the cap. And butterflies. (... Hereinafter referred to as the first problem solving means of the present invention.)

One of the main forms of the barrel plating apparatus is
(2) The cap is configured integrally with a bush having a sliding surface that slides with the fixed shaft and / or the peripheral surface near the end of the electrode. (... Hereinafter referred to as the second problem solving means of the present invention.)

One of the other forms of the barrel plating apparatus is as follows:
(3) The cap is provided with a convex portion protruding to the inner peripheral side, and a side surface in the vicinity of the end portion of the center rod of the electrode is regulated by a surface facing the convex portion. (... Hereinafter referred to as the third problem solving means of the present invention.)

One of the main forms of the barrel plating apparatus is
(4) It has the convex part which protrudes on a surrounding surface in the edge part vicinity of the said center rod, It is characterized by the above-mentioned. (... Hereinafter referred to as the fourth problem solving means of the present invention.)

One of the main forms of the barrel plating apparatus is
(5) The protrusion provided in the vicinity of the end of the center bar is formed separately from the main body of the center bar, and is fixed to the vicinity of the end of the main body of the center bar. To do. (... Hereinafter referred to as the fifth problem solving means of the present invention.)

The operation of the first problem solving means is as follows. That is,
The electrode has a center rod and at least one contact disposed so as to protrude in the middle of the center rod, and a cap is fixed to each of substantially the center of the side walls in the axial direction of the rotating barrel. The cap is formed in an annular shape, and the tip of the fixed shaft is inserted in the center, and the position of the side surface in the vicinity of the axial end of the center rod of the electrode in the rotating barrel is Since it is regulated by the opposing surfaces, even when the support member is warped or distorted, it is possible to suppress the relative displacement of the rotating barrel and the electrode (cathode) in the axial direction, The relative position between the workpiece in the rotating barrel and the electrode (cathode) is not biased.

  The operation of the second problem solving means is as follows. That is, since the cap is integrally formed with the bush having a sliding surface that slides with the fixed shaft and / or the peripheral surface near the end of the electrode, it is easy to assemble and Misalignment can be suppressed.

  The operation of the third problem solving means is as follows. That is, the cap has a convex portion projecting to the inner peripheral side, and the side surface in the vicinity of the end portion of the center rod of the electrode is regulated by the opposing surface of the convex portion. The rotating barrel can be rotatably supported. Therefore, it is easy to assemble and the electrode is stably supported in the rotating barrel.

  The operation of the fourth problem solving means is as follows. That is, since the convex portion protruding on the peripheral surface is provided in the vicinity of the end portion of the center rod, a side surface regulated by the opposing surface of the cap is provided without increasing the cross-sectional area of the center rod in the rotating barrel. And a decrease in the internal volume of the barrel can be suppressed.

  The operation of the fifth problem solving means is as follows. That is, the protrusion provided in the vicinity of the end of the center bar is formed separately from the main body of the center bar, and is fixed to the vicinity of the end of the center bar. An optimum material can be used for each part in terms of wear and other aspects.

According to the barrel plating apparatus of the present invention, the bias of the relative position between the workpiece in the rotating barrel and the electrode (cathode) does not occur. Thereby, it can suppress that film thickness variation arises in the plating film formed in the workpiece | work surface.
The above object and other objects, structural features, and operational effects of the present invention will become apparent from the following description and the accompanying drawings.

  Hereinafter, a barrel plating apparatus according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a side view showing an example of an outline of a barrel plating apparatus 10 of the present invention. FIG. 2 is a schematic cross-sectional view of the main part for explaining the characteristic part of the barrel plating apparatus 10 of the first embodiment.

As shown in FIG. 1, a barrel plating apparatus 10 of the present invention includes, for example, a machine frame F, a rotating barrel 12 that accommodates a workpiece W to be plated, and a driving motor M1 that rotationally drives the rotating barrel 12, for example. And a transmission means M2 for transmitting the rotation of the drive motor M1 to the rotary barrel 12 having a side wall 13a disposed at one end and having a gear shape on the outer periphery. Further, the machine frame F is provided with support members 19 and 19 which are opposed to each other at a predetermined interval, and fixed shafts 18 and 18 each projecting the tip end inward are fixedly disposed on the support members 19 and 19, respectively. Has been. Further, between the support members 19, 19, there is a rotating barrel 12 whose both ends are rotatably supported by the tip portions of the fixed shafts 18, 18. As shown in FIG. 2, the rotating barrel 12 has electrodes 11 whose both ends are locked by the fixed shafts 18 and 18, respectively, as shown in FIG. 2.
In the present embodiment, the drive motor M1 is attached to the machine frame F. However, the present invention is not limited to this, and when the drive force can be obtained from the outside by a drive chain or the like, the machine frame F There is no need to dispose the drive motor M1.

  Next, a characteristic configuration of the barrel plating apparatus 10 of the present embodiment will be described. As shown in FIG. 2, the electrode 11 of the barrel plating apparatus 10 of the present embodiment has a center bar 16 and at least one contact disposed so as to protrude in the middle of the center bar. Specifically, each of the contacts 17a is disposed at the tip, and a plurality of electrode rods 17 are disposed in the middle of the center rod 16 so as to be spaced apart from each other. Yes. Further, caps 15 and 15 are fixed to substantially the center of the side walls 13a and 13b at both ends in the axial direction of the rotary barrel 12, respectively, and the caps 15 and 15 are formed in an annular shape with the fixed shaft 18 and 18 tips are inserted. Further, the positions of the side surfaces 16 b and 16 b in the vicinity of the axial end of the center rod 16 of the electrode 11 in the rotating barrel 12 are restricted by the opposing surfaces 15 b and 15 b of the cap 15.

  Next, a preferred embodiment of the support members 19, 19 is as follows. That is, the support members 19 and 19 are preferably made of an acrylic resin, vinyl chloride resin, polypropylene resin or other insulating resin, and polypropylene resin is preferable in terms of durability and chemical resistance. The support members 19, 19 constitute a part of the machine frame F of the barrel plating apparatus 10, and the pair of support members 19, 19 attach the rotary barrel 12 to the side of the rotary barrel 12. It is preferable to arrange them vertically so as to sandwich them. In addition, holes for inserting a lead L and a fixed shaft 18 described later are provided around the rotation shaft of the rotating barrel 12 of the pair of support members 19, 19.

  Next, a preferred embodiment of the fixed shafts 18 and 18 is as follows. That is, the fixed shafts 18 and 18 are preferably made of ultrahigh molecular weight polyethylene, polyacetal resin, fluororesin or other insulating resin, and are different from the cap 15 and the bush 15 ′ described later in terms of wear resistance. More preferably, is used. The fixed shaft 18 is preferably disposed so as to face the openings of the pair of support members 19 and 19 and fixed to the support members 19 and 19 in a non-rotatable manner with screws or the like.

Next, a preferred embodiment of the rotating barrel 12 is as follows. That is, the rotating barrel 12 includes a pair of side walls 13a and 13b at both ends, and a peripheral wall 14 is provided so as to connect the vicinity of each edge of the pair of side walls 13a and 13b.
The peripheral wall 14 includes a plurality of porous frames 14a and a single or a plurality of meshes 14b disposed so as to close the openings of the porous frames 14a. And it is preferable that it is formed smaller than the minimum dimension of a workpiece such as a chip-shaped electronic component. The porous frame 14a of the peripheral wall 14 is made of an insulating resin such as an acrylic resin or a vinyl chloride resin, and an acrylic resin is preferable in terms of workability. The mesh 14b is preferably made of polyester fiber or the like in terms of durability and chemical resistance.

  Next, a preferred embodiment of the pair of side walls 13a and 13b of the rotating barrel 12 is as follows. That is, as said side wall 13a, 13b, what consists of insulating resins, such as an acrylic resin and a vinyl chloride resin, is preferable, and an acrylic resin is preferable at the point of workability.

  Next, a preferred embodiment of the electrode 11 is as follows. That is, the electrode 11 has a center bar 16 to be described later and at least one contact arranged so as to protrude in the middle of the center bar 16. The electrode 11 has a plurality of electrode rods 17 that are spaced apart from each other and disposed in the middle of the center rod, and is preferably configured in a comb-like shape as a whole, but is not limited thereto. For example, only one electrode rod 17 on which the contact point 17a is disposed may be disposed in the middle of the center rod. The electrode is not limited to a comb-like shape. For example, the substantially U-shaped electrode rod having a rod-shaped contact extending long in parallel with the center rod 16 is suspended from the center rod. May be fixed to the center bar and arranged in a so-called drop shape. Further, the center bar itself may be bent in the shape of a crank and configured in the same manner as the drop-shaped electrode bar, and may be provided with a bar-shaped contact protruding from the rotating shaft and extending in parallel. The electrode 11 is disposed in the rotating barrel 12, and both ends thereof are locked to the fixed shafts 18 and 18 so that the rotation is restricted by a fixing pin, fitting or other locking means.

Next, a preferred embodiment of the center bar 16 is as follows. That is, as the center rod 16, the inside of a cylindrical body made of a coating material such as an insulating resin or the like on the surface of copper, a copper alloy or other conductive member, or an acrylic resin, vinyl chloride resin or other insulating resin. It is preferable that the conductive member is inserted and sealed with a sealing material or the like to prevent invasion of a plating solution or water. Further, a base end portion of an electrode rod 17 to be described later is implanted in the center rod 16 by screwing or the like, or is formed integrally with the center rod 16.
Further, the diameter in the vicinity of the end of the center rod 16 is formed in the same manner as the middle where the electrode rod 17 described later is disposed, but is not limited to this. For example, in the vicinity of the end of the center rod It may have a convex portion protruding on the peripheral surface.
Further, the vicinity of the end of the center bar 16 is formed integrally with the middle where the electrode bar 17 is disposed. However, the present invention is not limited to this. For example, it is separated from the main body of the center bar. The projecting portion formed on the center rod may be fixedly provided near the end of the main body of the center bar.

  Next, a preferred embodiment of the side surface 16b in the vicinity of the axial end of the center bar is as follows. That is, the side surface 16b refers to a surface exposed toward the tip side of the center bar in the vicinity of the end of the center bar. In the present embodiment, it refers to an end surface in contact with the peripheral surface in the vicinity of the end portion of the center bar 16, but is not limited to this. May be a newly formed side surface. Moreover, the surface exposed toward the front end side of the said center rod of the convex part provided so that it may protrude on the peripheral surface in the edge part vicinity of the said center rod may be sufficient. Moreover, the surface exposed toward the front end side of the said center rod formed by each adhering to the front end side of the said center rod may be sufficient as the edge part formed separately from this center rod.

  Next, a preferred embodiment of the electrode rod 17 is as follows. That is, the electrode rod 17 is made of a conductive material such as copper or copper alloy, and has a contact 17a at the tip, and the surface of the conductive member except the tip is coated with an insulating resin or the like, Or the thing which inserted the said electrically-conductive member in the inside of the cylindrical body which consists of an acrylic resin, a vinyl chloride resin, or other insulating resin, and sealed with the sealing material etc., and prevented the penetration | invasion of plating solution, water, etc. is preferable. The lengths of the electrode rods 17 are preferably equal to each other, but are not limited thereto. Further, in the case where a substantially U-shaped electrode rod having a rod-shaped contact extending long in parallel with the center rod 16 is arranged in a so-called drop shape, the surface of the portion other than the contact is made of an insulating resin or the like. A coated one is preferred.

  Next, a preferred embodiment of the cap 15 is as follows. That is, the cap 15 is preferably made of ultrahigh molecular weight polyethylene, polyacetal resin, fluororesin or other insulating resin, and fluororesin is preferable in terms of wear resistance and chemical resistance. The cap 15 is disposed in an opening provided at substantially the center of each of the one side wall 13a and the other side wall 13b of the rotary barrel 12, and is fixed to the side walls 13a and 13b in a non-rotatable manner by screws or the like. Those are preferred.

The cap 15 is provided separately from the bush 15 ′ having a sliding surface that slides with the peripheral surface of the fixed shaft 18 and / or the end portion of the center rod 16 of the electrode 11 in the vicinity thereof. However, the present invention is not limited to this. For example, it may be configured integrally with the bush 15 ′.
Moreover, in this embodiment, although the said cap 15 consists of a flat plate formed in cyclic | annular form, it is not limited to this, For example, while providing the convex part which protrudes to an inner peripheral side, it is relative to this convex part. The side surface in the vicinity of the edge portion of the center rod of the electrode may be regulated by the surface to be performed.

  Next, preferred embodiments of the opposed surfaces 15b, 15b of the caps 15, 15 are as follows. That is, the opposing surfaces 15b and 15b are surfaces facing at least the inner side of the rotating barrel 12. Further, the opposing surfaces 15b and 15b are preferably smooth. Moreover, in the thing in which a convex part is provided in the inner peripheral side of the said cap, what the surface where this convex part opposes is smooth is preferable.

  Next, a second embodiment of the barrel plating apparatus of the present invention will be described with reference to FIG. FIG. 3 is a schematic cross-sectional view of an essential part for explaining a characteristic part of the barrel plating apparatus 20 of the second embodiment. Since the overall configuration of the barrel plating apparatus 20 is the same as that of the first embodiment, description thereof is omitted.

  As shown in FIG. 3, the barrel plating apparatus 20 of the present embodiment is fixedly disposed so that the support members 29 and 29 face each other at a predetermined interval, and the tip portions of the support members 29 and 29 protrude inward. The fixed shafts 28, 28, the rotating barrel 22 whose both ends are rotatably supported by the tip portions of the fixed shafts 28, 28, and the both ends of the fixed shafts 28, 28 disposed in the rotating barrel 22, respectively. And the electrode 21 locked so as to restrain the rotation. Similar to the barrel plating apparatus 10 of the first embodiment, the electrode 21 has a center bar 26 and at least one contact point 27a disposed so as to protrude in the middle of the center bar 26. Specifically, each of the contacts 27a is disposed at the tip, and a plurality of electrode rods 27 are disposed in the middle of the center rod 26 so as to be separated from each other. Has been. Caps 25, 25 are fixed to substantially the center of the side walls 23 a, 23 b at both ends in the axial direction of the rotating barrel 22, respectively. The cap 25 is formed in an annular shape, and the tip of the fixed shaft 28 is inserted in the center. Has been. Further, the positions of the side surfaces 26b, 26b in the vicinity of the axial end of the center rod 26 of the electrode 21 in the rotating barrel 22 are restricted by the opposing surfaces 25b, 25b of the caps 25, 25.

  Further, in the barrel plating apparatus 20 of the present embodiment, the cap 25 is configured integrally with a bush having a sliding surface that slides with the fixed shaft 28 and / or the peripheral surface near the end of the electrode 21. Yes.

  Further, in the barrel plating apparatus 20 of the present embodiment, the cap 25 includes a convex portion 25a that protrudes toward the inner peripheral side, and the surface 25b of the convex portion 25a faces the end portion of the center rod 26 near the end portion of the electrode 21. The side surface 26b is regulated.

  Further, the barrel plating apparatus 20 of the present embodiment has a convex portion 26 a that protrudes on the peripheral surface in the vicinity of the end portion of the center bar 26.

  The barrel plating apparatus 20 of the present embodiment is different from the first embodiment in that the cap 25 and the bush are integrally configured, and the convex portion 25a on the inner peripheral side of the cap 25 is It is in the point which protrudes in the inner peripheral side rather than the sliding surface with the said center stick | rod 26. FIG. A second difference of the barrel plating apparatus 20 of the present embodiment from the first embodiment is that a convex portion 26a protruding on the peripheral surface is provided in the vicinity of the end portion of the center rod 26, and the convex portion. A side surface 26b of the center rod 26 facing the front end side of the center rod 26 is restricted by the opposing surface 25b of the cap 25, and the convex portion 26a is disposed at the center of the side walls 23a, 23b of the rotating barrel 22. The cap 25 is housed inside the cap 25. According to this, it is easy to assemble, and the side surface 26b of the convex portion 26a of the center bar 26 can be made larger in diameter, and the surface 25b facing the convex portion 25a protruding to the inner peripheral side of the cap 25 It can be regulated stably. Alternatively, the side surface 26b can be formed without increasing the diameter of the entire portion of the center bar 26 disposed in the rotary barrel 22, and the internal volume of the rotary barrel 22 can be greatly reduced. There is nothing.

  Next, a third embodiment of the barrel plating apparatus of the present invention will be described with reference to FIG. FIG. 4 is a schematic cross-sectional view of an essential part for explaining the characteristic part of the barrel plating apparatus 30 of the third embodiment. Since the overall configuration of the barrel plating apparatus 30 is the same as that of the first embodiment, description thereof is omitted.

  As shown in FIG. 4, the barrel plating apparatus 30 of the present embodiment is disposed to be fixed to the support members 39, 39 facing each other at a predetermined interval and the support members 39, 39. Fixed shafts 38 and 38, a rotating barrel 32 whose both ends are rotatably supported by the tip portions of the fixed shafts 38, 38, and both ends disposed in the rotating barrel 32 to the fixed shafts 38 and 38, respectively. And an electrode 31 locked so as to be constrained in rotation. Similar to the barrel plating apparatus 10 of the first embodiment, the electrode 31 has a center bar 36 and at least one contact point 37a disposed so as to protrude in the middle of the center bar 36. Specifically, each of the contact rods 37a is disposed at the tip, and a plurality of electrode rods 37 are disposed in the middle of the center rod 36 so as to be separated from each other. Has been. Caps 35, 35 are fixed to substantially the center of the side walls 33a, 33b at both ends in the axial direction of the rotary barrel 32, respectively, and the cap 35 is formed in an annular shape with the tip of the fixed shaft 38 at the center. Is inserted, and the positions of the side surfaces 36b, 36b in the vicinity of the axial end of the center rod 36 of the electrode 31 in the rotating barrel 32 are regulated by the opposed surfaces 35b, 35b of the caps 35, 35. Yes.

  In the barrel plating apparatus 30 of the present embodiment, the cap 35 is configured integrally with a bush having a sliding surface that slides on the fixed shaft 38 and / or the peripheral surface near the end of the electrode 31. Yes.

  Further, in the barrel plating apparatus 30 of the present embodiment, the cap 35 includes a convex portion 35a that protrudes toward the inner peripheral side, and the surface 35b of the convex portion 35a faces the end portion of the center rod 36 near the end portion of the electrode 31. The side surface 36b is regulated.

  Further, the barrel plating apparatus 30 of the present embodiment has a convex portion 36 a that protrudes on the peripheral surface in the vicinity of the end portion of the center bar 36.

  Further, in the barrel plating apparatus 30 of the present embodiment, the large-diameter protruding portion 36 ″ having a convex portion 36a provided in the vicinity of the end portion of the center rod 36 is separated from the main body 36 ′ of the center rod 36. The center rod 36 is formed and fixed in the vicinity of the end of the main body 36 ′.

  The barrel plating apparatus 30 of the present embodiment is different from the second embodiment in that the large-diameter protruding portion 36 ″ housed in the cap 35 of the center bar 36 is the center bar 36 as described above. The main body 36 'is formed separately from the main body 36' and is fixed to the vicinity of the end of the main body 36 'of the center bar 36. Specifically, the center bar 36 has the main body 36 to which the electrode bar 37 is fixed. And a large-diameter projecting portion 36 "which is fixed to the end portion of the main body 36 'and has a larger diameter than the end portion. According to this, an optimum material can be used for each part from the viewpoints of workability, wear resistance, and the like. For example, it is preferable to use a material having excellent wear resistance for the large-diameter protrusion 36 ″. The large-diameter protrusion 36 ″ can be easily replaced when worn, and the large-diameter protrusion 36 ″ can be replaced. In order to prevent a gap between the portion 36 ″ and the main body 36 ′ of the center bar 36, the large-diameter protruding portion 36 ″ is preferably fixed to the main body 36 ′ with screws or the like.

  Next, a fourth embodiment of the barrel plating apparatus of the present invention will be described with reference to FIG. FIG. 5 is a schematic cross-sectional view of the main part for explaining the characteristic part of the barrel plating apparatus 40 of the fourth embodiment. Since the overall configuration of the barrel plating apparatus 40 is the same as that of the first embodiment, description thereof is omitted.

  As shown in FIG. 5, the barrel plating apparatus 40 of the present embodiment is provided with support members 49, 49 facing each other at a predetermined interval, and fixedly disposed on the support members 49, 49. Fixed shafts 48 and 48, a rotating barrel 42 whose both ends are rotatably supported by the tip ends of the fixed shafts 48, 48, and both ends disposed in the rotating barrel 42 to the fixed shafts 48 and 48, respectively. And an electrode 41 locked so as to be constrained in rotation. Similar to the barrel plating apparatus 10 of the first embodiment, the electrode 41 has a center bar 46 and at least one contact 47a disposed so as to protrude in the middle of the center bar 46. Specifically, the contact 47a is disposed at the tip, and a plurality of electrode rods 47 are disposed in the middle of the center rod 46 so as to be separated from each other. Has been. Caps 45, 45 are fixed to substantially the center of the side walls 43a, 43b at both ends in the axial direction of the rotating barrel 42, respectively, and the cap 45 is formed in an annular shape with the tip of the fixed shaft 48 at the center. The position of the side surfaces 46b, 46b in the vicinity of the axial end of the center rod 46 of the electrode 41 in the rotating barrel 42 is regulated by the opposed surfaces 45b, 45b of the caps 45, 45. Yes.

  Further, in the barrel plating apparatus 40 of the present embodiment, the cap 45 is configured integrally with a bush having a sliding surface that slides with the fixed shaft 48 and / or a peripheral surface near the end of the electrode 41. Yes.

  Further, in the barrel plating apparatus 40 of the present embodiment, the cap 45 includes a convex portion 45a that protrudes toward the inner peripheral side, and the surface 45b of the convex portion 45a faces the end portion of the center rod 46 of the electrode 41. The side surface 46b is regulated.

  Next, the barrel plating apparatus 40 of the present embodiment is different from the first embodiment in that the cap 45 and the bush are integrally formed, and a convex portion on the inner peripheral side of the cap 45 is provided. 45a is provided at the inner end of the cap 45 in the axial direction so as to protrude from the outer peripheral surface of the center bar 46 to the inner peripheral side. In addition, the second difference between the barrel plating apparatus 40 of the present embodiment and the first embodiment is that the surface formed by reducing the outer peripheral portion on the tip side of the center rod 46 by cutting or the like. The side surface 46b is in the vicinity of the end. According to this, when a gap due to wear or the like occurs in the sliding portion exposed in the barrel, correction by insertion of a spacer or the like is possible.

  Next, a fifth embodiment of the barrel plating apparatus of the present invention will be described with reference to FIG. FIG. 6 is a schematic cross-sectional view of the main part for explaining the characteristic part of the barrel plating apparatus 50 of the fifth embodiment. Since the overall configuration of the barrel plating apparatus 50 is the same as that of the first embodiment, description thereof is omitted.

  As shown in FIG. 6, the barrel plating apparatus 50 of the present embodiment is provided with support members 59, 59 that are opposed to each other at a predetermined interval, and are fixedly disposed on the support members 59, 59, respectively, and the tip portions protrude inward. Fixed shafts 58 and 58, a rotating barrel 52 whose both ends are rotatably supported by the tip portions of the fixed shafts 58 and 58, and both ends disposed in the rotating barrel 52 to the fixed shafts 58 and 58, respectively. And an electrode 51 locked so as to be constrained in rotation. Similar to the barrel plating apparatus 10 of the first embodiment, the electrode 51 has a center bar 56 and at least one contact 57a disposed so as to protrude in the middle of the center bar 56. More specifically, each of the contacts 57a is disposed at the tip, and a plurality of electrode rods 57 disposed in the middle of the center rod 56 are spaced apart from each other, and are configured in a comb-like shape as a whole. Has been. Further, caps 55 and 55 are fixed to substantially the center of the side walls 53a and 53b at both ends in the axial direction of the rotating barrel 52, respectively, and the cap 55 is formed in an annular shape and has a tip portion of the fixed shaft 58 at the center. Is inserted, and the positions of the side surfaces 56b, 56b in the vicinity of the axial end of the center rod 56 of the electrode 51 in the rotating barrel 52 are regulated by the opposing surfaces 55b, 55b of the caps 55, 55. Yes.

  In the barrel plating apparatus 50 of the present embodiment, the cap 55 is configured integrally with a bush having a sliding surface that slides with the fixed shaft 58 and / or the peripheral surface near the end of the electrode 51. Yes.

  Further, in the barrel plating apparatus 50 according to the present embodiment, the cap 55 includes a convex portion 55a that protrudes toward the inner peripheral side, and the surface 55b of the convex portion 55a faces the end portion of the center bar 56 near the end portion. The side surface 56b is regulated.

  Further, in the barrel plating apparatus 50 of the present embodiment, the protrusion 56 ″ provided in the vicinity of the end of the center bar 56 is formed separately from the main body 56 ′ of the center bar 56. It is fixed in the vicinity of the end of the main body 56 '.

  The barrel plating apparatus 50 of this embodiment differs from the previous fourth embodiment in that the small-diameter protrusion 56 ″ of the center bar 56 is formed separately from the main body 56 ′ of the center bar 56, Specifically, the center bar 56 is fixed to the vicinity of the end of the main body 56 ′ of the center bar 56. Specifically, the center bar 56 is respectively connected to the main body 56 ′ to which the electrode bar 57 is fixed and the end of the main body 56 ′. It is composed of a small-diameter protrusion 56 ″ that is fixed and has a smaller diameter than the end. According to this, an optimum material can be used for each part from the viewpoints of workability, wear resistance, and the like.

  Next, a sixth embodiment of the barrel plating apparatus of the present invention will be described with reference to FIG. FIG. 7 is a schematic cross-sectional view of an essential part for explaining the characteristic part of the barrel plating apparatus 60 of the sixth embodiment. Since the overall configuration of the barrel plating apparatus 60 is the same as that of the first embodiment, description thereof is omitted.

  As shown in FIG. 7, the barrel plating apparatus 60 of the present embodiment is provided with support members 69 and 69 that are opposed to each other at a predetermined interval, and are fixedly disposed on the support members 69 and 69, respectively, and the tip portions protrude inward. The fixed shafts 68 and 68, the rotating barrel 62 whose both ends are rotatably supported by the tip portions of the fixed shafts 68 and 68, and the both ends disposed in the rotating barrel 62 to the fixed shafts 68 and 68, respectively. And an electrode 61 locked so as to be constrained in rotation. Similar to the barrel plating apparatus 10 of the first embodiment, the electrode 61 has a center bar 66 and at least one contact point 67a disposed so as to project in the middle of the center bar 66. Specifically, each of the contacts 67a is disposed at the tip, and a plurality of electrode rods 67 are disposed in the middle of the center rod 66 so as to be separated from each other. Has been. Caps 65, 65 are fixed to substantially the centers of the side walls 63 a, 63 b at both ends in the axial direction of the rotating barrel 62, respectively, and the cap 65 is formed in an annular shape with the tip of the fixed shaft 68 at the center. Is inserted, and the positions of the side surfaces 66b, 66b in the vicinity of the axial end of the center rod 66 of the electrode 61 in the rotating barrel 62 are regulated by the opposing surfaces 65b, 65b of the caps 65, 65. Yes.

  Further, in the barrel plating apparatus 60 of the present embodiment, the cap 65 is integrally formed with a bush having a sliding surface that slides with the fixed shaft 68 and / or the peripheral surface near the end of the electrode 61. Yes.

  Further, in the barrel plating apparatus 60 of the present embodiment, the cap 65 includes a convex portion 65a that protrudes to the inner peripheral side, and the surface 65b of the convex portion 65a faces the end portion of the center rod 66 of the electrode 61 in the vicinity. The side surface 66b is regulated.

  Further, the barrel plating apparatus 60 of the present embodiment has a convex portion 66 a that protrudes on the peripheral surface in the vicinity of the end portion of the center bar 66.

The barrel plating apparatus 60 of the present embodiment is different from the fourth embodiment in that the protrusion protruding on the peripheral surface of the center bar 66 in the vicinity of the one side wall 63a and the other side wall 63b of the rotary barrel 62. A portion 66a is provided, and the surface of the convex portion 66a facing the tip side of the center rod 66 is used as the side surface 66b. According to this, the side surface 66b can be formed without increasing the diameter of the entire portion of the center bar 66 disposed in the rotating barrel 62, and the inner volume of the rotating barrel 62 can be reduced. There is no significant decrease.
Further, as the convex portion 66a of the center bar 66, it is preferable that the outer peripheral portion excluding the convex portion 66a of the center bar 66 is formed by cutting or the like, but is not limited to this. An annular protrusion or the like formed separately from 66 may be fitted near the end of the center bar 66.

  Next, a seventh embodiment of the barrel plating apparatus of the present invention will be described with reference to FIG. FIG. 8 is a schematic cross-sectional view of the main part for explaining the characteristic part of the barrel plating apparatus 70 of the seventh embodiment. Since the overall configuration of the barrel plating apparatus 70 is the same as that of the first embodiment, description thereof is omitted.

  As shown in FIG. 8, the barrel plating apparatus 70 of the present embodiment is provided with support members 79, 79 opposed to each other at a predetermined interval, and fixedly disposed on the support members 79, 79, and the tip portions protrude inward. Fixed shafts 78 and 78, a rotating barrel 72 whose both ends are rotatably supported by the tip portions of the fixed shafts 78, 78, and both ends disposed in the rotating barrel 72 to the fixed shafts 78 and 78, respectively. And an electrode 71 locked so as to be constrained in rotation. Like the barrel plating apparatus 10 of the first embodiment, the electrode 71 has a center bar 76 and at least one contact point 77a disposed so as to project in the middle of the center bar 76. Specifically, each of the contacts 77a is disposed at the tip, and a plurality of electrode rods 77 are disposed in the middle of the center rod 76 so as to be spaced apart from each other, and are configured in a comb-like shape as a whole. Has been. Further, caps 75 and 75 are fixed to substantially the center of the side walls 73a and 73b at both ends in the axial direction of the rotating barrel 72, respectively, and the cap 75 is formed in an annular shape and has a tip portion of the fixed shaft 78 at the center. Is inserted, and the positions of the side surfaces 76b, 76b in the vicinity of the axial end of the center rod 76 of the electrode 71 in the rotating barrel 72 are regulated by the opposing surfaces 75b, 75b of the caps 75, 75. Yes.

  Further, in the barrel plating apparatus 70 of the present embodiment, the cap 75 is configured integrally with a bush having a sliding surface that slides with the fixed shaft 78 and / or the peripheral surface near the end of the electrode 71. Yes.

  Further, the barrel plating apparatus 70 of the present embodiment has a convex portion 76 a that protrudes on the peripheral surface in the vicinity of the end portion of the center bar 76.

  The barrel plating apparatus 70 of this embodiment is different from the previous embodiment in that the above-described second to sixth embodiments are each provided with a convex portion on the inner peripheral side of the cap, and on the side surface of the convex portion. Although the side surface in the vicinity of the end portion of the center bar is regulated, the present invention is not limited to this, and as shown in the present embodiment, the cap 75 is provided without providing a convex portion on the inner peripheral side thereof. The side surface 76b of the convex portion 76a in the vicinity of the end portion of the center rod 76 may be guided by the opposing surface 75b of the inner end portion of the 75 axial direction.

  The present invention is suitable for forming a plating film having a uniform thickness on the surfaces of a plurality of workpieces such as chip-shaped electronic components.

It is a side view which shows an example of the outline | summary of the barrel plating apparatus of this invention. It is a schematic diagram of the principal part cross section for demonstrating 1st Embodiment of the barrel plating apparatus of this invention. It is a schematic diagram of the principal part cross section for demonstrating 2nd Embodiment of the barrel plating apparatus of this invention. It is a schematic diagram of the principal part cross section for demonstrating 3rd Embodiment of the barrel plating apparatus of this invention. It is a schematic diagram of the principal part cross section for demonstrating 4th Embodiment of the barrel plating apparatus of this invention. It is a schematic diagram of the principal part cross section for demonstrating 5th Embodiment of the barrel plating apparatus of this invention. It is a schematic diagram of the principal part cross section for demonstrating 6th Embodiment of the barrel plating apparatus of this invention. It is a schematic diagram of the principal part cross section for demonstrating 7th Embodiment of the barrel plating apparatus of this invention. It is a schematic diagram of the principal part cross section which shows an example of background art. It is sectional drawing of the principal part cross section for demonstrating the subject of background art.

Explanation of symbols

10: Barrel plating apparatus 11: Electrode 12: Rotating barrel 13a, 13b: Side wall 14: Peripheral wall 14a: Perforated frame 14b: Mesh 15: Cap 15 ': Bush 15b: Opposing surface 16: Center bar 16b: Side surface 17: Electrode bar 17a: contact 18: fixed shaft 19: support member 20: barrel plating device 21: electrode 22: rotating barrel 23a, 23b: side wall 24: peripheral wall 24a: perforated frame 24b: mesh 25: cap (also used as a bush)
25a: convex portion 25b: opposing surface 26: center rod 26a: convex portion 26b: side surface 27: electrode rod 27a: contact 28: fixed shaft 29: support member 30: barrel plating device 31: electrode 32: rotating barrels 33a, 33b : Side wall 34: Peripheral wall 34a: Perforated frame 34b: Mesh 35: Cap (also used as bush)
35a: convex portion 35b: opposing surface 36: center rod 36 ': main body 36 ": protruding portion 36a: convex portion 36b: side surface 37: electrode rod 37a: contact 38: fixed shaft 39: support member 40: barrel plating device 41 : Electrode 42: Rotating barrel 43a, 43b: Side wall 44: Peripheral wall 44a: Perforated frame 44b: Mesh 45: Cap (also used as bush)
45a: convex portion 45b: opposing surface 46: center rod 46a: small diameter portion 46b: side surface 47: electrode rod 47a: contact 48: fixed shaft 49: support member 50: barrel plating device 51: electrode 52: rotating barrels 53a, 53b : Side wall 54: peripheral wall 54a: perforated frame 54b: mesh 55: cap (also used as bush)
55a: convex portion 55b: opposing surface 56: center rod 56 ': main body 56 ": protruding portion 56a: small diameter portion 56b: side surface 57: electrode rod 57a: contact 58: fixed shaft 59: support member 60: barrel plating device 61 : Electrode 62: Rotating barrel 63a, 63b: Side wall 64: Peripheral wall 64a: Perforated frame 64b: Mesh 65: Cap (also used as bush)
65a: convex portion 65b: opposite surface 66: center rod 66a: convex portion 66b: side surface 67: electrode rod 67a: contact 68: fixed shaft 69: support member 70: barrel plating device 71: electrode 72: rotating barrels 73a, 73b : Side wall 74: Peripheral wall 74a: Perforated frame 74b: Mesh 75: Cap (also used as bush)
75b: opposing surface 76: center rod 76a: convex portion 76b: side surface 77: electrode rod 77a: contact 78: fixed shaft 79: support member F: machine frame L: lead W: conductive dummy particles and workpiece

Claims (5)

  A supporting member opposed to each other at a predetermined interval; a fixed shaft that is fixedly disposed on each of the supporting members and that protrudes inward from the tip portion; and a rotary barrel that is rotatably supported at both ends by the tip portion of the fixed shaft. In the barrel plating apparatus having an electrode disposed in the rotating barrel and having both ends locked to be fixed to the fixed shaft, the electrode protrudes between the center bar and the center bar. At least one contact point arranged in the manner described above, and caps are fixed to substantially the center of the side walls at both ends in the axial direction of the rotary barrel, and the caps are formed in an annular shape and fixed to the center. The tip of the shaft is inserted, and the position of the side surface in the vicinity of the axial end of the center rod of the electrode in the rotating barrel is regulated by the opposing surface of the cap. That barrel plating apparatus.   2. The barrel plating apparatus according to claim 1, wherein the cap is formed integrally with a bush having a sliding surface that slides on a peripheral surface in the vicinity of an end of the fixed shaft and / or the electrode.   The barrel plating apparatus according to claim 2, wherein the cap includes a convex portion projecting to the inner peripheral side, and a side surface of the electrode in the vicinity of the end portion of the center rod is regulated by a surface facing the convex portion.   The barrel plating apparatus according to claim 1, further comprising a convex portion protruding on a peripheral surface in the vicinity of an end portion of the center bar. Characterized in that said projecting portion in the vicinity of the end portion of the center rod is provided, the protruding portion is formed in the main body and another member of the center rod, in which is fixed to the end portion of the main body of the center bar The barrel plating apparatus according to claim 1.

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