JPS6361397B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a plating aid used for plating bag-like bodies such as bag nuts.

(Prior Art) Conventionally, a first tool has been used as a tool for loading and unloading a large number of bag-shaped materials to be plated such as bag nuts (hereinafter, description will be given using bag nuts as an example) into and out of a cleaning tank, plating tank, etc. A rack A as shown in the figure is known.

This rack A consists of a column 1 that also serves as an electrode (the electrode plate is covered with an insulator), and a number of upper and lower holding arms 2 protruding left and right symmetrically, and a cap nut is attached to the tip of each holding arm 2. B is attached. In addition, each holding arm 2 is designed to improve the drainage performance from the cap nut B.
It is installed so as to protrude from the support column 1 in an upwardly inclined manner.
In addition, this holding arm 2 can be of various types, such as a type that holds the cap nut B by using the spring force (expansion force) of the wire as shown in the figure, and a type that holds the cap nut B from the outside. has been adopted.

However, when plating was performed using this rack A, the following problem occurred. That is, when bag nut B is immersed together with rack A in liquid C such as plating liquid as shown in FIG.
Since the cap nut B was in an inclined position with the opening facing down, some of the air inside the cap nut B did not escape and remained, resulting in poor plating on the inner surface of the nut.

(Object of the Invention) Therefore, the present invention provides a plating aid that can reliably exhaust internal air during such a liquid bath, thereby achieving a good internal plating effect.

(Structure of the Invention) The present invention is characterized by a plating rack in which a holding arm for holding a bag-like material to be plated such as a bag nut is protruded from a support that also serves as an electrode in an upwardly inclined state. It is a plating auxiliary tool to be attached, in which the main pipe attached to the support of the rack and the upwardly inclined branch pipe attached to the holding arm are interconnected in an internal communication state through an insulator such as plastic. The plating aid is provided with a check valve provided at the lower end of the main pipe to allow only the flow of liquid from the inside of the main pipe to the outside.

(Example) In FIGS. 1 to 3, numeral 3 is a plating aid according to the present embodiment, and the main pipe 4 corresponding to the support column 1 of the rack A is connected to the main pipe 4 made of an electrical insulator such as plastic.
A pair of left and right branch pipes 5, 5 inclined upward corresponding to a pair of left and right holding arms 2, 2 are integrally connected in a state of internal communication, and a check valve 6 is provided at the lower end of the main pipe 4. It is completed.

The check valve 6 includes a ball 62 that is movable up and down, and a ball seat 63 that supports the ball 62 and allows liquid to pass through it, in a valve cylinder 61 that fits into the lower end of the main pipe 4 and is attached by screwing or the like. It is made up of the following. The ball 62 rises due to buoyancy while immersed in the liquid to close the lower end opening of the main pipe 4, and when pulled up from the liquid, descends to open the lower end opening of the main pipe.

One plating auxiliary tool 3 is used for each of the two cap nuts B, B held by the pair of left and right holding arms 2, 2 in the rack A. That is, as shown in FIG. 2, with the branch pipes 5, 5 on both sides along the pair of left and right holding arms 2, the main pipe 4 is attached to the easy support column 1.
It is used by being attached to the band 7 etc. Therefore, in the rack A as a whole, a plurality of plating aids 3 are attached to the rack A in a vertical line, as shown in FIG. In this case, if the plating aids 3 cannot be arranged coaxially in parallel due to the relationship between the overall length of the plating aids 3 and the pitch of the upper and lower holding arms 2 in the rack A, they may be placed vertically adjacent to each other as shown in the figure. The auxiliary tools 3, 3 may be attached with the main pipes 4, 4 shifted from each other left and right. Or auxiliary tool 3...
may be attached alternately to the front and back of the support column 1.

In this plating aid 3, the above-mentioned rack A
When the upper end of the main pipe 4 is attached to the branch pipes 5 and 5 on both sides,
The main pipe 4 and the branch pipes 5 and 5 are located at a higher position than the upper end, and so that the tip of the branch pipe 5 can reach the inner tip of the cap nut B as shown in FIGS.
The length dimension is set. Note that the tips of the branch pipes 5, 5 are cut so that the openings of the tips are directed substantially upward.

The action of this plating aid 3 will be explained.

As shown in FIGS. 3A and 3B, with the cap nut B fitted and held in the holding arm 2 of the rack A and the tip of the branch pipe 5 of the plating aid 3, apply cleaning liquid, plating liquid, etc. Immerse in liquid C.

In this case, the check valve 6 of the plating auxiliary tool 3 closes as the ball 62 rises due to buoyancy at the same time as it is pushed into the liquid, and the liquid C is prevented from flowing into the auxiliary tool 3.

If the rack A continues to be submerged in the liquid, the liquid C will begin to flow into the cap nut B, and the opening of the cap nut B will be blocked by the liquid C, as shown in FIG. 3A. Then, as the rack A is sunk, the pressure of the liquid in the cap nut B rises, and this fluid pressure pushes the air trapped in the cap nut B from the opening at the tip of the branch pipe 5 to the branch pipe. 5 and is discharged to the outside (upper part) through the main pipe 4. This air discharge action is performed until the liquid level exceeds the level of the opening at the tip of the branch pipe 5, as shown in FIG.
As a result, all the air inside the nut is discharged, and the cap nut B is filled with the liquid C.

After this, liquid C flows into the branch pipe 5,
The auxiliary tool 3 is filled with the liquid C at the same time as the main pipe 4 is immersed in the liquid.

After this liquid bath, when rack A is pulled out of the liquid,
The ball 62 of the check valve 6 loses its buoyancy and descends as shown by the phantom line in FIG.

According to this plating aid 3, when the cap nut B is bathed in liquid as described above, all the air inside the cap nut B can be reliably discharged without leaving any residue, so that a series of treatments such as pickling, degreasing, and plating can be carried out. The effect is evenly distributed over the entire inner surface of the nut.

By the way, in the above embodiment, the case where one plating aid is used for a pair of cap nuts B, B is illustrated, but the plating aid of the present invention is such that a single main pipe is provided with a pair of branch pipes in multiple stages above and below. It is also possible to have a structure that can be used for a plurality of upper and lower nut pairs at once, or a structure that can be used for all nuts with one nut.

However, it is necessary to wash (wash with water) the auxiliary tool itself as the process progresses, and from the viewpoint of this cleaning effect, it is desirable to form one auxiliary tool into a small size as in the above embodiment.

In addition to the ball check valve type described above, a needle valve type, a butterfly valve type, etc. can be used as the check valve.

(Effects of the Invention) As described above, when using the plating auxiliary tool of the present invention, when a bag-shaped material to be plated such as a bag nut is bathed in liquid, it is possible to reliably exhaust all the air inside the material to be plated. This eliminates cleaning leaks, degreasing leaks, plating leaks, etc. on the inner surface, and provides a good plating effect.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a plating auxiliary tool according to an embodiment of the present invention and a rack to which this auxiliary tool is attached; FIG. 4 is a partially enlarged sectional view for explaining the function of the tool, and FIG. 4 is a view corresponding to FIG. 3B for explaining the problems of the prior art. A... Rack, 1... Support, 2... Holding arm, B
... Bag nut, 3 ... Metsuki auxiliary tool, 4 ... Main pipe, 5 ... Branch pipe, 6 ... Check valve.

Claims (1)

[Claims] 1. A plating auxiliary tool that is attached to a plating rack having a support that also serves as an electrode, and a holding arm for holding a bag-like material to be plated, such as a bag nut, protruding from the support with an upwardly tilted tip, which supports the rack. The main pipe attached to the holding arm and the upwardly sloping branch pipe attached to the holding arm are connected to each other in an internal communication state using an insulator such as plastic, and the lower end of the main pipe is connected to the inside of the main pipe. A plating aid characterized by being provided with a check valve that allows only the flow of liquid to the outside.