JPH07331497A - Barrel plating device - Google Patents

Abstract

PURPOSE:To obtain a barrel plating device suitable for plating a small quantity of works. CONSTITUTION:A base plate l is provided with a rotating vessel 2 opened at its front surface and an electric motor 3 for driving this vessel. This base plate 1 is suspended attachably and detachably in an inclined state to and from a plating tank in such a manner that the rotary vessel 2 faces the inside of the plating liquid. The rotary vessel 2 is provided with plural pieces of electrodes 5 along the circumferential direction thereof and a liquidtight housing chamber is formed between a rotating member 6 rotating integrally with the rotary vessel 2 and a fixing member 7 supporting this rotating member 6. A rotary switch consisting of respective terminals communicating with the respective electrodes located along the rotating direction of the rotating member 6 and a conductive plate with which the respective terminals connecting to the electrodes rotating to the bottom end side of the base plate 1 among the electrodes is housed in this housing chamber. The conductive plate thereof is connected to a cathode electrode A installed at the plating tank.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a barrel plating apparatus suitable for plating a small amount of small parts.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a base plate a is provided with a rotary container b having an open front surface and an electric motor c for driving the rotary container b, and the base plate a is provided on the base plate a. It is known that an electrically conductive hook f suspends the cathode bar e provided above the plating tank d in an inclined state so as to be detachable (Japanese Utility Model Publication No. 57-55337).

[0003]

[Problems to be Solved by the Invention]
An electrode (dangler) made of a copper lump provided at the tip of a cathode wire g electrically connected to the hook f is inserted into the rotary container b through the opening of the rotary container b to energize the work.

For this reason, the electrode and the work contact each other only at one place, and it is difficult to uniformly energize the whole work. Moreover,
Since the work is pushed by the electrode as the rotating container b rotates,
There was a problem that the work was distorted due to excessive force applied to the work.

Therefore, it is conceivable that a plurality of the electrodes are fixedly provided on the bottom of the rotary container b along the circumferential direction thereof.

However, in this barrel plating apparatus, in order to improve the rolling of the work in the rotary container b, the rotary container b is inclined and immersed in the plating tank. If a plurality of electrodes are provided along the circumferential direction, electrodes that do not come into contact with the work can be formed. Then, current concentrates on the electrode, and rough plating is attached to the surface of the electrode, and when it contacts the work next time, it peels off and mixes in the work, so it is necessary to select it after the plating process is completed. In addition, it is expected that a current will flow through the electrode that does not contact the work, resulting in a failure such that the work cannot be energized according to the theoretical design.

Therefore, it is conceivable to mix a dummy with the work so that all the electrodes come into contact with the work. In this case, when an expensive plating solution such as gold plating is used, the dummy is added to the work. However, since the plating process is performed, there is a problem that the plating solution is wasted.

An object of the present invention is to obtain a barrel plating apparatus that does not have such a problem.

[0009]

In order to achieve such an object, the present invention provides a base plate with a rotary container having an open front surface and an electric motor for driving the rotary container, and plating the base plate. In a barrel plating device suspended in a tank in a tilted state so as to be detachable, a plurality of electrodes are provided on the inner bottom surface of the rotating container along the circumferential direction thereof, and a rotating member that rotates integrally with the rotating container. A liquid-tight space is formed between the rotating member and a fixed member, and each terminal connected to each electrode arranged along the rotation direction of the rotating member is connected to the fixed member. It is characterized in that a rotary switch composed of a conductive plate in contact with each terminal connected to the electrode rotated to the lower end side is housed, and the conductive plate is connected to the cathode electrode provided in the plating tank.

[0010]

In the barrel plating apparatus having the above structure, as the rotary container rotates, the electrodes connected to the terminals in contact with the electrode plate, that is, only the electrodes in contact with the work, are energized,
The remaining electrodes will not be energized.

[0011]

Embodiments of the present invention will be described with reference to the drawings. In the drawing, reference numeral 1 denotes a base plate provided with a rotary container 2 having an open front surface and an electric motor 3 for driving the rotary container 2. The base plate 1 is attached to and detached from the plating tank in a tilted state as shown in FIG. Suspend so you can. To further explain this, the base plate 1 is suspended by a conductive hook 4 provided on the base plate 1 in an inclined state on a cathode bar A provided above the plating tank.

The rotating container 2 is made of a non-conductive material such as acrylic resin and has an octagonal bottomed cylindrical shape, and is formed by forming an extremely small number of liquid passage holes on its peripheral wall surface, as shown in this embodiment. The size of the rotary container 2 is 70 mm in diameter and 8 in height.
It is 0 mm.

On the inner bottom surface of the rotary container 2, eight electrodes 5 were provided at equal intervals along the circumferential direction.

The rotary container 2 is supported by a rotary member 7 supported by a fixed member 6 fixed on the base plate 1, and a gear 8 provided on the rotary member 7 is mounted on a drive shaft of the electric motor 3 by a gear 9. Then, the intermediate gears 10 and 11 on the base plate 1 are meshed with each other to rotate them.

Reference numeral 12 denotes a liquid-tight storage chamber formed between the fixed member 6 and the rotary member 7, and the electrodes 5 arranged in the storage chamber 12 along the rotation direction of the rotary member 7. A rotary switch 15 is housed, which comprises a terminal 13 connected to each other and a conductive plate 14 in contact with each terminal 13 connected to the electrode 5 that has been rotated to the lower end side of the base plate 1 among the electrodes 5, and the conductive plate 14 is connected to the cathode electrode A provided in the plating tank, and each electrode 5 is energized.

More specifically, the fixing member 6 comprises a shaft 16 which serves as a rotation center axis of the rotary container 2 and a cylindrical pressing member 17 which fixes the shaft 16 on the base plate 1. Is fixed on the base plate 1 with bolts 18.
The rotating member 7 is composed of the gear 9 rotatably attached to the pressing member 17 and a block 20 fitted to the shaft 16 via a bearing ring 19 and overlapping with the pressing member 17. Is fixed to the gear 9 with bolts 21. In this block 20, the rotary container 2
A cap-shaped rotary container base 23 provided on the lower end of a shaft 22 protruding from the bottom surface of the block is fitted and then fixed to the block 20 with a cap screw 24.

The block 20 is composed of an upper member 20a and a lower member 20b, and both members 20a, 20b are bolts 2.
It is fixed by tightening together with 5.

As shown in FIG. 4, the conductive plate 14 constituting the rotary switch 15 is under the base plate 1 and extends in the range of 138 degrees in front of the rotary container 2, and the remaining portion is made of Teflon. And the like non-conductive plate 26. The conductive plate 14 is electrically connected to the lead wire 28 connected to the hook 4 via the connection terminal 27, and the block 20
Each of the terminals 13 supported by the upper member 20a includes a bolt 13a screwed into the upper member 20a and a contactor 13b slidably inserted into and supported by the lower member 20b. The bolt 13a and the contactor 13b are supported.
A spring 13c is interposed between and so that the contact 13b is brought into contact with the conductive plate 14 reliably by the spring force of the spring 13c.

The electrical connection between each electrode 5 and each terminal 13 is provided with a bolt 30 electrically connected to each electrode 5 provided on the rotary container base 23 via a lead wire 29, and the rotary container is provided. A connection plate 31 that is electrically connected to the bolt 30 is provided on the inner surface of the table 23, and the heads of the bolts 13a that form the terminals 13 are brought into contact with the connection plate 31. The electrode 5 projects from the head portion 5 a facing the inner bottom surface of the rotary container 2 to the outside through the peripheral wall surface of the rotary container 2.
b, and the lead wire 29 is connected to the protrusion 5b. Then, a cylindrical piece 32 made of the same material as that of the rotating container 2 surrounding each projection 5b is attached to the outside of the rotary container 2, and the projection 5b is filled with an electric insulating material. Avoid contact with the plating solution.

Further, a cylindrical tube piece 33 surrounding the bolt 30 projecting therefrom is attached to the rotary container base 23, and an electric insulating material is filled in the tube piece 33 so that the bolt 25 does not come into contact with the plating solution. I chose

Reference numeral 34 denotes a contact surface between the base plate 1 and the pressing member 17, a contact surface between the gear 8 and the pressing member 17, and the block 2.
0 contact surface between upper member 20a and lower member 20b and terminal 2
4 shows the respective O-rings provided by surrounding the bolts that constitute No. 4.

Reference numeral 35 denotes a washer for holding the bearing ring 12 interposed between the shaft 11 and the member 14b, and 3
Reference numeral 6 denotes a through hole for passing the lead wire 28 provided on the base plate 1, and 37 denotes a handle provided at the upper end of the base plate 1.

[0023]

As described above, according to the present invention, since the work is energized by contacting with a plurality of electrodes provided along the circumferential direction of the inner bottom surface of the rotary container, it is possible to use a dangler as a conventional one. In addition, since the work can be energized only to the electrodes that are in contact with the work without being distorted, the work can be energized according to the theoretical design and the work can be plated as desired. .

Moreover, a liquid-tight storage chamber is formed between the rotary member that rotates integrally with the rotary container and the fixed member that supports the rotary member, and the liquid-tight storage chamber is disposed in the storage chamber along the rotation direction of the rotary member. A rotary switch composed of each terminal connected to each of the electrodes and a conductive plate in contact with each terminal connected to the electrode that has rotated to the lower end side of the base plate among the electrodes is housed to energize the work. Therefore, it is possible to reliably carry out the above-mentioned energization to the electrodes without the rotary switch coming into contact with the plating solution.

[Brief description of drawings]

FIG. 1 is a side view showing an example of implementing the present invention.

[Figure 2] Front view

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a IV-IV line drawing of FIG.

FIG. 5 is an enlarged view of a part of the rotating container.

FIG. 6 is a side view showing a conventional example.

[Explanation of symbols]

1 base plate 2 rotating container 3 electric motor 4 hook 5 electrode 6 fixing member 7 rotating member

Claims (1)

[Claims] 1. A barrel plating apparatus in which a base plate is provided with a rotary container having an open front surface and an electric motor for driving the rotary container, and the base plate is suspended from a plating tank in a tilted state so as to be detachable. A plurality of electrodes are provided along the circumferential direction on the inner bottom surface of the rotary container, and a liquid-tight storage chamber is provided between a rotary member that rotates integrally with the rotary container and a fixed member that supports the rotary member. And each terminal connected to each electrode arranged along the rotation direction of the rotating member in the storage chamber, and each terminal connected to the electrode that has rotated to the lower end side of the base plate among the electrodes. A barrel plating apparatus characterized in that a rotary switch composed of a contacting conductive plate is housed and the conductive plate is connected to a cathode electrode provided in a plating tank.