JPH0417574Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention uses barrel-based plating and other surface treatment equipment, in which a barrel is supported so as to be sequentially transferred and immersed in a bath for each treatment process. This invention relates to a barrel power supply device that reliably supplies current.

[Conventional technology]

Conventional methods of supplying power to a barrel used for plating surface treatment include the method shown in Japanese Utility Model Publication No. 56-28219, and the method shown in FIGS. 6 to 10.

However, in either method, a total of four pole rods of two protrudes from both sides of the upper end of the barrel frame to support the barrel in the tank, and the barrel is attached to the upper end of the frame of the processing liquid tank for each treatment process. Four V-shaped saddles for holding power and protruding from each barrel are installed.
Place the pole rod on the barrel side on each saddle as shown in Figures 7 and 8, and hold the barrel by bringing the saddle and the pole into contact, and power is supplied to the inside of the barrel through the saddle pole. There is.

[The problem that the idea aims to solve]

Generally, plating requires a large amount of current, so the required electrical capacity is supplied to each barrel from four barrels. Therefore, four poles on the barrel side and four saddles on the processing tank side are required, but in this four-point simultaneous contact power feeding system, V on the tank side
Centering and leveling adjustment of the shaped saddle, machining and assembly precision of the pole rod on the barrel side are required. Furthermore, during long-term use, metal fatigue and distortion may occur on either the barrel frame or the processing tank side or on the whole, making it difficult to supply contact power using the V-shaped saddles at the four locations. Often, the rods are in a non-contact state and power is supplied to three locations.

In addition, as shown in Figure 8a and b, this V-shaped saddle has a flat V groove and a barrel-side pole bar is a round bar, so the contact pressure between the V-shaped saddle and the pole bar is It is determined by the weight of the barrel, and the contact can be point contact or line contact. If a large current is supplied for a long time through such a point or line contact, failures at the contact point and heating accidents due to poor contact may occur.

[Means for solving the problem] An L-shaped current collector plate is attached to at least one end of the barrel frame to the outside of the barrel frame, and the tip side thereof hangs down almost vertically, and the end piece of this tip side is placed on the side opposite to the bushing. A bracket provided on the processing tank or equipment side that supports the barrel is provided with a power feeding bush at a position facing and in contact with the current collector plate when the barrel is set. energize a spring that presses the

[Effect]

For barrels that are sequentially transferred and immersed in each treatment process liquid tank, an L-shaped current collector plate is installed on the frame end of the barrel so that the tip side hangs down almost vertically, and an L-shaped current collector plate is attached to the treatment liquid tank side. By lowering the barrel into the processing liquid tank, the barrel is suspended into the processing liquid tank to ensure surface contact with the power supply bushing installed under spring pressure, so the required current can be reliably supplied to the barrel in a simple manner. Furthermore, wiring work can be reduced, and the surroundings of the tank can be simplified, making maintenance, inspection, and maintenance easier.

〔Example〕

Next, the power supply device for the barrel of the present invention will be explained based on the illustrated embodiment.

FIGS. 1 and 2 show a state in which a barrel body 1 is rotatably supported by a barrel frame 2 and installed in a processing tank 7 so as to be able to supply power. Barrel body 1
is rotatably supported on the barrel frame 2,
Electricity is supplied into the barrel body from a current collecting plate 3 protruding from one side of the upper part of the barrel frame 2 via lead wires 6, 6.

As shown in FIGS. 3 and 4 in detail, the current collector plate 3 has a conductive metal plate insulated from the barrel frame 2 and is bent into an L-shape. The side 31 is disposed on the barrel frame 2 via a bush 33 and fixed with a bolt 34, and the tip side 32 of the current collecting plate 3 hangs down almost perpendicularly to the side surface of the barrel frame.
2 makes surface contact with the bush 4 to supply power. Therefore, the tip side of the current collector plate 3 has a flat surface.

Reference numeral 4 denotes a power supply bushing, which is insulated from the processing tank 7 and is provided directly on the upper part of the tank or protrudes from the frame on the apparatus side. The bush 4 has a guide rod 42, such as a bolt, projecting almost horizontally from the back of a bracket 41 which is insulatively protruded and fixed to a fixed side 71 of the processing tank 7, etc.
Mounting plate 4 on which the main body 40 of the bushing is fixed to 2
3 is movably supported, and a spring 44 whose resiliency is adjustable in a guide rod 42 always pushes and protrudes the bush 4 toward the processing tank, that is, toward the current collector plate. FIG. 3 shows a state in which the bush main body 40 is protruded by the action of the spring 44. At this time, the front end surface of the bush main body 40 is in a state of protruding slightly from the lowered position of the outer surface of the current collecting plate front end side 32 when the barrel is lowered into the tank. Further, a braided copper wire 5 is connected to the bush mounting plate 43, and is connected to a terminal 51. A branch wiring 8 is coupled to this terminal 51 via a base busbar 10 and a branch busbar 9 so as to be connected to a power rectifier (not shown). The front end surface of the bush main body 40 is planar and enables surface contact with the front end side of the current collector plate to have the required contact area, thereby eliminating any conduction failure or current loss and ensuring reliable power supply. Make it possible.
As shown in FIG. 4, when the barrel body 1 is lowered into the processing tank 7 together with the barrel frame, the tip side 32 of the current collector plate comes into contact with the tip surface of the protruding bush body 40, and the spring is applied in the direction of the arrow. The push spring is compressed by the reaction pressure against the pushing pressure, and the tip end surface of the bush main body is pressed against the tip end side of the current collector plate with strong pressure, and there is a surface contact between the two. In addition, as the barrel moves up and down, the current collector plate and the barrel are always in a state of sliding contact, and the contact surfaces between the current collector plate and the bush are constantly brought into contact with new surfaces, improving current efficiency. FIG. 5 is a wiring diagram showing a method of supplying power from the rectifier to the bush 4.

On the other hand, FIG. 9 shows a wiring diagram of a conventional power supply method. In the conventional power supply method, four power supply saddles are required for one barrel, so each of the power supply saddles attached to the processing tank requires wiring from a rectifier. The rectifier and the branch busbar are connected by a frame, and the branch busbar is connected to the branch busbar. The branch bus bars and the V-shaped saddle are connected to each other using branch bus bars so that they can be energized. Busbars are usually made of copper or aluminum. In addition, the power supply saddle is made of brass or gunmetal casting, but there are many parts to be manufactured, and the construction work is complicated, which together with the material costs and processing and construction costs are extremely expensive.

[Effect of idea]

The power supply device for the barrel of the present invention has an L-shape on at least one side of the barrel frame, and a current collector plate is protruded with the tip facing downward and vertically, and the power is collected when the barrel is set in the processing tank or equipment side that supports the barrel. A power feeding bush is provided in a position that faces and makes surface contact with the electric plate, and the bush is loaded with a spring that presses it toward the current collector plate, so a single power feeding bush and current collector plate can be used reliably. It has the advantages that surface contact can be made, the required amount of current can be reliably supplied, the device is simple, wiring is simple, and maintenance and inspection can be performed easily.

[Brief explanation of the drawing]

The drawings show an embodiment of the power supply device of the barrel according to the present invention, and FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a side view.
Figure 4 is an enlarged explanatory diagram of the power supply section, Figure 5 is a wiring diagram,
6 to 9 are diagrams of known examples, in which FIG. 6 is a front view, FIG. 7 is a side view, FIG. 8 is an enlarged explanatory view of the power feeding section, and FIG. 9 is a wiring diagram. In the figure, 1 is the barrel body, 2 is the barrel frame, 3 is the current collector plate, 32 is the tip side, 4 is the bushing,
40 is a bushing body, 44 is a spring, 5 is a braided copper wire, and 7 is a processing tank.

Claims (1)

[Scope of utility model registration request] An L-shaped current collector plate is provided on at least one end of the barrel frame so as to protrude outward from the barrel frame, with the tip side hanging down almost vertically, and the end piece on the tip side being slightly bent toward the side opposite to the bushing. A power supply bushing is provided on a bracket provided on the processing tank or equipment side that supports this barrel at a position that faces and contacts the current collector plate when the barrel is set, and a spring is applied to the bush to press it against the current collector plate. Barrel power supply device.