JPH0441183Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to the structure of a rack for electroplating a wheel disk serving as a side plate of a wheel for supporting an automobile tire.

(Prior art) An aluminum wheel disc is a member that has a substantially cylindrical rim fixed to its outer periphery, and the central part is fixed to a brake drum or the like with bolts, and because it is exposed to the outside, from a design consideration, for example, as shown in Fig. 4. It has intricate patterns like this. The aluminum wheel disc 1 shown in FIG. 4 has four bolt holes 3 in a central boss portion 2, and a number of spoke portions 4 protrude radially from the outer periphery of the boss portion 2 and are connected to an outer ring portion 5. , giving a sharp impression like a wheel disc using spokes. However, when such radial spoke portions 4 are provided, the root boundary portion B of the adjacent spoke portions 4 becomes narrower, and the plating coverage on portion B becomes poor. If you transmit high radio waves,
The surface portion A of the outer ring portion 5 is burnt. That is, the A part becomes a high current part, and the boundary part B and the surface part C of the boss part 2 have a low current compared to the A part.
The plating film thickness is thicker in the A part, and the plating film thickness is thinner in the B and C parts. Conventionally, as a countermeasure against this, an auxiliary anode is used near the B part, but since the auxiliary anode is made of iron, iron dissolves in the plating solution, leading to aging of the plating solution, and The uniform electrodeposition of the area also does not improve. Moreover, the scorching of the high current portion A cannot be eliminated.

(Purpose of the invention) The object of the invention is to make it possible to mount a shielding plate at an optimum position on a rack jig for mounting an aluminum wheel disk 1.

(Structure of the invention) The present invention has a conductor inside which is connected to a bus bar, and a transverse current-carrying protrusion that engages with a hole in the center of the wheel disk on the conductor in the middle of the rack, which has a non-conductor coating. A pair of upper and lower shielding plates projecting sideways from the rack with a small distance and a small protrusion amount are provided, and concentric annular first and second shielding plates sandwich the outer circumference of the wheel disk hooked on the projection at a predetermined distance. This is a rack jig for electroplating a wheel disk, which is fixed to a pair of upper and lower second projections having a large vertical distance and a large protrusion amount through adjusting bolts.

By adjusting the position of the shield plate with respect to the aluminum wheel disc using an adjuster bolt (shield plate attachment tool), the shield plate can be set at the optimum position.

(Example) In FIG. 1, the rack jig 7 is an internal conductor 8.
(copper) and outer covering (polyethylene, etc.),
The conductor 8 has a hook part 8 for the bus bar 10 at the upper end.
It has a. At the center of the lower half of the rack jig 7 is provided a horizontal protrusion 11 for energization protruding from the conductor 8.
The bolt hole 3 of the aluminum wheel disc 1 is hooked onto the tip of this protrusion 11, so that the aluminum wheel disc 1 is held in a vertical plane.
The outer circumference of aluminum wheel disc 1 is spaced at specified intervals.
Concentric ring-shaped first and second shielding plates 12 _{and 13} sandwiching L ₁ and L 2 apart are located in a vertical plane parallel to the aluminum wheel disc 1, and both shielding plates 12 and 13 are integrally mounted horizontally from the rack jig 7. The first protrusion 14 protrudes from the
and is fixed to the second protrusion 15 by tightening bolts 18, 19 via adjusting bolts 16, 17. The pair of upper and lower first protrusions 14 have a small protrusion amount _H1 from the main body of the rack jig 7, and a small vertical distance _L3 . Also, the pair of upper and lower second protrusions 15 are connected to the easy jig 7.
The amount of protrusion H ₂ from the main body and the vertical distance L ₄ are larger than H ₁ and L ₃ , and the shielding plate 12 occupies positions above and below the upper and lower ends of the first shielding plate 12 . Therefore, the first shielding plate 12 does not interfere with the upper and lower second projections 15.

The detailed structure of the adjusting bolt 17 portion is shown in FIG. In FIG. 2, a screw hole 21 is provided concentrically at the tip of the second protrusion 15.
The male threaded portion 22 of the adjusting bolt 17 can be screwed into the adjusting bolt 17. A screw hole 23 having the same shape as the screw hole 21 is provided at the other end of the adjusting bolt 17, and the second shielding plate 13 is held between the adjusting bolt 17 and the tightening bolt 19. The tightening bolt 19 has a male threaded portion 24 that fits into both of the threaded holes 21 and 23. The second shielding plate 13 is integrally provided with plate-shaped protrusions 26 and 27 at the upper and lower ends as shown in FIG.
The protruding piece 26 fits into the male threaded portion 24 of the tightening screw 19 at a notch 28 that is open on one side. The lower protruding piece 27 has a hole 29 into which the lower tightening screw 19' is inserted.
The male threaded portion (Fig. 1) will fit. On the other hand, the first shielding plate 12 has holes in its annular body into which threaded portions of tightening bolts 18, 18' are fitted.

To attach the aluminum wheel disc 1 to the rack jig 7, loosen the upper and lower tightening screws 19, 19'.
Turn the second shielding plate 13 in the direction of arrow X in FIG. 3 so as to remove the projection 26 from the tightening screw 19, and
9' and open one side of the rack jig 7.
In this state, hook the aluminum wheel disc 1 onto the energizing protrusion 11, then turn the second shielding plate 13 in the reverse X direction to hook the protrusion 26 onto the tightening screw 19, and then hook both tightening screws 19, 19'. The second shielding plate 13 is fixed by tightening. In order to adjust the distances L ₁ and L ₂ between the shielding plates 12 and 13 and the aluminum wheel disk 1, the adjuster bolts 16 and 17 may be removed or the number thereof may be increased. i.e. for example the distance L ₂
To increase this, first remove the tightening screws 19, 19' and the second shielding plate 13, then attach another adjustment bolt to the adjustment bolt 17, and then tighten the second shielding plate 13 again by tightening the bolts 19, 19'. Attach it by Then, the distance _L2 can be increased by a dimension corresponding to the effective length _L5 of the adjuster bolt 17. The same applies to changing the position of the first shielding plate 12.

(Effects of the invention) As explained above, in the present invention, a wheel is attached to the conductor 8 in the middle of the rack jig 7 which has the conductor 8 connected to the bus bar 10 inside and has the non-conductor coating 9. A horizontal protrusion 11 for electricity supply that engages with the hole 3 in the center of the disk 1 is provided, and the protrusion 11
A concentric ring _- shaped first and second ring which sandwich the outer circumference of the wheel disk ₁ hooked on the
The shielding plates 12 and 13 are protruded sideways from the rack jig 7 with a vertical spacing and a first pair of upper and lower protrusions with a small amount of protrusion.
Since the adjustment bolts 16 and 17 are fixed to the pair of second projections 15 having a large vertical distance and a large protrusion amount from the projection 14, the following special effects can be obtained. That is, by attaching the shielding plates 12 and 13, the high current portion of the aluminum wheel disc 1 can be shielded, and the problem of scorching caused by high current on the surface portion A of the outer ring portion 5 can be solved, and the low current portion B can be prevented. , C's power becomes better. Therefore, the drawbacks of the prior art, such as scorching in portion A and poor throwing power in portions B and C, are eliminated, and uniform electrodeposition as a whole can be achieved. Also, Figures 1 to 3
If the structure of the embodiment shown in the figure is adopted, the aluminum wheel disk 1 can be easily adjusted by simply attaching and detaching the adjusting bolts 16 and 17, albeit in a multi-step manner.
The distances L ₁ and L ₂ between the shielding plates 12 and 13 can be adjusted, and no skill is required for the adjustment work. In addition, since both the first projection 14 and the second projection 15 are provided one each on the upper and lower sides, when installing the shielding plates 12 and 13, first temporarily fix the upper ends to the projections 14 and 15 with the tightening bolts 18 and 19. Just by doing so, the shielding plate 12,
13 is fixed, lower tightening bolts 18', 1
9' installation becomes easy. When adjusting bolt 17 and tightening screw 19 as shown in Fig. 2 are adopted, each male threaded part 22, 24 extends over the entire length of threaded hole 21, 2.
3, the position of the shielding plate 13 can be determined accurately.

(Another embodiment) The adjuster bolt 17 is omitted and the tightening screw 19 is
The male threaded portion 24 of the screw hole 21 is formed to be sufficiently long.
The position of the shielding plate 13 can also be adjusted steplessly by screwing the shielding plate 13 into the male threaded portion 24 and arranging two lock nuts on the male threaded portion 24. By providing a notch similar to the notch 28 in place of the hole 29 in FIG.
The upper and lower parts of the shielding plate 13 can be freely separated from the adjustment bolt, and the shielding plate 13 can be separated from the protrusion 15.
and the adjusting bolt 17 or between the adjusting bolt 17 and the tightening screw 19 (without removing the adjusting bolt 17 and the tightening screw 19).

[Brief explanation of the drawing]

Figure 1 is a side view, Figure 2 is an exploded side view, Figure 3 is a front view of the second shielding plate in Figure 1 as seen from the arrow, and Figure 4 is a front view of the aluminum wheel disk in Figure 1. be. 1...Wheel disk, 3...Bolt hole, 7...Rack jig, 8...Conductor, 9...Coating, 10...Bus bar, 11...Protrusion, 12, 1
3...First and second shielding plates, 14...First protrusion, 1
5... Second protrusion, 16, 17... Adjustment bolt, L ₁ , L ₂ ... Spacing.

Claims (1)

[Scope of utility model registration request] A conductor in the middle of the rack, which has a conductor connected to the bus bar and is coated with a non-conductor, is provided with a lateral protrusion for conducting electricity that engages with a hole in the center of the wheel disk, and is latched onto the protrusion. Concentric ring-shaped first and second shielding plates sandwiching the outer periphery of a wheel disk at a predetermined distance from the rack are provided with a pair of upper and lower first protrusions that protrude sideways from the rack and have a small vertical spacing and a small protruding amount, and the vertical spacing and protruding amount. A rack jig for electroplating a wheel disc, characterized in that the jig is fixed to a pair of large upper and lower second protrusions via adjustment bolts.