JPH0114684Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a power supply device for a rotary plating device that can stably supply power to the rotating shaft of a rotary plating device that holds and rotates a workpiece while plating it. It is related to.

(Prior art) In a rotary plating device, both ends of the workpiece are held between rotating shafts, and the object is rotated in a processing bath while being energized to perform plating. This was done using a power supply device with a power supply brush made of carbon or the like fixed below, so if the object to be processed heats up and becomes distorted due to energization, the rotating shaft becomes slightly eccentric, or the power supply brush wears out, etc. There was a problem in that poor contact or excessive contact occurred, making it impossible to provide stable power supply.

(Purpose of the invention) The present invention solves these problems and provides a power supply in a rotary plating apparatus that can always provide stable power supply even when the rotating shaft is slightly eccentric or the power supply brush is worn out. It was completed for the purpose of equipment.

(Structure of the invention) The present invention includes a slider that can slide in a direction perpendicular to the rotation axis on a base installed below the rotation axis that grips and rotates the workpiece, and the upper surface of the slider A pair of brush guides extending obliquely inward from both left and right ends toward the shaft are provided, and a brush is attached to the brush guides for contacting the rotating shaft under the spring force of a spring and supplying power to the brush guides. It is.

(Embodiment) Next, the present invention will be described in detail with reference to the illustrated embodiment. In the figure, 1 is a rotating shaft for rotating a cylindrical or cylindrical workpiece while being held between its tip parts, and is plated. It is supported by a bearing 2 while penetrating the side wall of the tank. Reference numeral 3 denotes a base provided on the machine frame at a position below the rotating shaft 1. As shown in FIG. A slider 6 having a gap 5 in the center is slidably supported on the top. This slider 6 has a male screw 7 which is erected upward in the center of the base 3 and passes through this gap 5.
Since the guide 8, which is about 20 mm shorter in width, is fixed, the slider 6 can slide on the rail 4 in a direction orthogonal to the rotating shaft 1 only within a predetermined range of about 10 mm on each side. Further, a pair of brush guides 9 and 10 are provided on the upper surface of the slider 6 and extend diagonally inward from both left and right ends toward the center of the rotating shaft 1, and these brush guides 9 and 10 are equipped with carbon brushes. 11 and 12 are attached together with cooling plates 13 and 14 under the force of springs 15 and 16 so as to be in constant contact with the rotating shaft 1, and the tips of the brushes 11 and 12 are circularly shaped so as to be in close contact with the outer periphery of the rotating shaft 1. It has a peripheral surface, and power supply lines 17 and 18 are attached to the upper surface thereof. Cooling plates 13 and 14 are brushes 1
This is to prevent the temperature of the brushes 11 and 12 from rising as a result of heat generation of the brushes 1 and 12 themselves and heat generation due to contact resistance between the brushes and the rotating shaft 1, and a flow path for circulating cooling water is provided inside the brushes. 19 and 20 are formed, but it is also possible to use forced air cooling using compressed air. Note that 21 and 22 are guide tubes protruding from the bottom surfaces of the brush guides 9 and 10 to guide the shafts 23 and 24 of the cooling plates 13 and 14, and 25 shown in FIG.
The drive gear 26 is a gear fixed to the tip of the drive gear 26.
This is for rotating the rotating shaft 1 by meshing with the rotating shaft 1.

In this structure, the object to be treated is held between the tips of the rotating shafts 1 arranged oppositely, and a current for plating is applied from the power supply lines 17 and 18 to the rotating shafts through the brushes 11 and 12. If the rotating shaft 1 is rotated by the gear 25 and the drive gear 26 while supplying power to the rotating shaft 1 to perform rotary plating, even if the workpiece or the rotating shaft 1 is distorted due to the heat generated during plating and the rotating shaft 1 becomes eccentric, Even if the rotating shaft 1 causes a so-called scouring motion, the brush guides 9 and 10 are provided with a slider 6 on the base 3 provided below the rotating shaft 1 in a direction perpendicular to the rotating shaft. Since the brush guides 9 and 10 are provided on the upper surface so as to extend diagonally inward from both left and right ends toward the rotating shaft 1, the brush guides 9 and 10 move to follow the horizontal eccentricity of the rotating shaft 1 and absorb it. Also, the brushes 11 and 12
are attached to brush guides 9 and 10 extending obliquely inward toward the center of the rotating shaft 1 under the force of springs 15 and 16, so that they always move to follow the eccentricity of the rotating shaft 1 in the vertical direction. The springs 15 and 16 make it possible to contact the rotating shaft 1 with uniform pressure and supply power to it. Further, even if the brushes 11 and 12 are worn out, the springs 15 and 16 will adjust the brush 1 accordingly.
1 and 12 in the direction of the rotating shaft 1, power can be supplied without any problem. Note that in this embodiment, since the slider 6 does not move beyond a predetermined range in a direction perpendicular to the rotating shaft 1, the cartridge-type rotating shaft 1 is lowered from above the power supply device fixed to the machine base. Even in such a case, the center lines of the rotating shaft 1 and the brushes 11, 12 do not shift, and the engagement between the two is always performed reliably.

(Effects of the invention) As is clear from the above explanation, the present invention allows the brush that supplies power to the rotating shaft to move in the direction perpendicular to the rotating shaft and in the vertical direction. Even if eccentricity occurs, the brush can follow the eccentricity and supply power to the rotating shaft with constant pressure, and even if the brush wears out, the contact pressure will hardly change. This prevents over-contact or poor contact, and ensures stable power supply at all times.Furthermore, the brushes are attached to a pair of brush guides that extend diagonally inward, and are in contact with both sides of the lower side of the rotating shaft to supply power. Therefore, it has various advantages such as being able to stably supply power even when the rotating shaft is bent downward due to its own weight or bearing wear, etc., and solves the problems with the power supply device in conventional rotary plating equipment. As such, it has extremely great practical value.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a partially cutaway side view and FIG. 2 being a partially cutaway front view. 1: Rotation axis, 3: Base, 6: Slider, 9,
10: Brush guide, 11, 12: Brush, 1
5, 16: Spring.

Claims (1)

[Scope of utility model registration request] A slider 6 that can slide in a direction perpendicular to the rotating shaft 1 is provided on a base 3 provided below the rotating shaft 1 that grips and rotates the workpiece. A pair of brush guides 9 and 10 are provided that extend diagonally inward from both left and right ends, and the brush guides 9 and 10 have brushes 11 that contact the rotating shaft 1 under the force of springs 15 and 16 to supply power to the brush guides 9 and 10. , 12 is installed in a rotary plating apparatus.