JPH10251897A - Rack device for surface treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deposition and adhesion of a plating metal on the surface of a main body frame, etc., by forming the main body frame and hanger of the rack device for supporting a metallic work in a plating liquid of synthetic resins which are nonconductors at the time of immersing the work into the plating liquid and subjecting its surface to a surface treatment, such as plating. SOLUTION: At the time of subjecting a caliber bracket (work) 11 to the plating treatment in the treatment liquid L, such as plating, the hanger, such as hook 9 or holder 8a, for hanging the work 11 is mounted at the main body frame 7. This hanger is inserted into the pin hole 11a of the work 11 to support the work 11. The main body frame 7 is immersed into the plating liqiud L and the surface of the work 11 is subjected to the surface treatment, such as plating. In such a case, the holder 8a is formed of the nonconductor, such as polyvinyl chloride and the front end of the hanger is provided with an energizing element 19, which is brought into contact with the inside wall of the pin hole 11a of the work 11. The work 11 with its opening faced downward is hung, by which the contact with the plating liquid is prevented and the deposition and adhesion of the plating metal are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment rack device for immersing a work formed by casting, forging, or the like in a treatment liquid to apply a surface treatment to the work. The present invention relates to a surface treatment rack device suitable for performing a treatment.

[0002]

2. Description of the Related Art A conventional surface treatment rack apparatus is disclosed in, for example, JP-A-7-25460. In this rack device, a plurality of hanging tools such as hooks and hangers are fixedly mounted on a ladder-shaped main body frame provided with a connecting jig on an upper portion, and the connecting jig is suspended from a track chain. The guide rail is attached to a power supply hanger that moves up and down, and the work suspended by the hanging tool is sequentially immersed in a plurality of liquid tanks arranged along the track chain to remove rust, degrease, deoxidize,
When performing a surface treatment such as plating and washing, and plating a work using the work as an anode or a cathode, a conductor such as iron is used for a main body frame or a hanging tool of a rack device.

[0003]

However, in the plating step, since even the body frame and the hanging tool are immersed in the processing liquid, the plating is crystallized on the surface of the body frame and the hanging tool. The plating gradually grows larger. For this reason, when suspending the work by inserting the suspending tool into the through hole of the work, the plating adhered to the suspending tool may make it difficult to remove and insert the plating, or may damage the plating applied to the surface of the work. .

[0004] Plating to which the body frame or the hanging tool adheres may cause poor plating of the work or loss of electricity, and after plating, the crystal of the body frame or the hanging tool is shaved off with a file. Regular maintenance was required. Also, the plating solution tank is filled with a processing solution suitable for the plating area and thickness of the work, but since the plating also adheres to the surface of the body frame and the hanging tool as described above,
Not only does it require a fine control of the amount of liquid, but it also has the disadvantage that the processing liquid deteriorates quickly and is inferior in economy.

As a countermeasure, a measure has been taken to cover the surfaces of the main body frame and the hanging tool with a sheet made of vinyl chloride. However, the vinyl chloride sheet hardens due to aging, and cracks and peeling occur. The plating had to be applied each time the vinyl chloride sheet was cured, because the plating grew on the exposed ground.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rack apparatus for surface treatment which effectively prevents plating from adhering to a main body frame and a suspending tool, thereby improving workability, economy and maintenance. I have.

[0007]

According to the first object of the present invention, a hanging tool such as a hook or a holder for hanging a work is fixed to a body frame, and the work is mounted on the hanging tool. In the surface treatment rack device for immersing the suspended main body frame in the treatment liquid in the liquid tank and performing surface treatment on the work,
The main body frame is formed of a synthetic resin. Specific materials of the synthetic resin include vinyl chloride resin, acrylic resin, and polypropylene resin. By forming the body frame of the rack device for surface treatment with such a non-conductive synthetic resin, the surface of the body frame is formed. The plating does not adhere.

According to a second aspect of the present invention, a hanging tool such as a hook or a holder for hanging a work is fixed to a body frame, and the hanging tool is provided with the work. In a surface treatment rack apparatus for inserting a bottom hole to suspend a work, immersing the main body frame in a treatment liquid in a liquid tank, and performing surface treatment on the work, the suspending tool is formed of a nonconductor. At the same time, an energizing element for energizing the work is provided at the tip of the hanging tool, and the energizing element contacts the inner wall of the bottomed hole of the work, and the work is suspended with the opening of the bottomed hole facing downward. The hanging tool is characterized in that the tip side of the hanging tool is arranged upward.

According to the second aspect of the invention, the work is suspended from the hanging tool with the opening of the bottomed hole facing downward while the energizing element of the hanging tool contacts the bottom wall or the inner peripheral wall of the bottomed hole. Be held. When the workpiece is immersed in the plating solution from such a state, air remains in the upper portion of the bottomed hole, and the current-carrying element in contact with the inner wall of the bottomed hole is exposed to the residual air. Accordingly, there is no plating adhered to the current-carrying element that is not immersed in the processing liquid, and the hanging tool immersed in the processing liquid is formed of a nonconductor, so that there is no plating adhesion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a rack apparatus of the present invention is applied to a surface treatment apparatus for performing a surface treatment on a work of a caliper body and a caliper bracket of a disc brake for a vehicle will be described in detail with reference to the drawings. The surface treatment device 1
A plurality of liquid tanks 2a, 2b, 2c,... Installed on the floor surface
, A pair of upper and lower track chains 3a, 3b disposed along the upper portions of the liquid tanks 2a, 2b, 2c,..., And a plurality of sets of bridges installed at predetermined intervals on the track chains 3a, 3b. It has a guide rail 4 and a rack device 6 for surface treatment supported on each guide rail 4 via a power supply hanger 5 so as to be able to move up and down.

The rack device 6 includes a pair of left and right vertical rails 7a, 7
are connected by a plurality of horizontal rails 7b to form a ladder-shaped body frame 7, and a pair of right and left holders 8 are attached to the vertical rails 7a, 7a of the body frame 7.
a, 8b are fixed in upper and lower two stages, hooks 9 are fixed in two upper and lower stages on the horizontal rail 7b of the main body frame 7, and a connecting jig 10 also serving as a power receiving part is connected to the upper part of the main body frame 7. It is configured. The connecting jig 10 is connected to a power supply hanger 5 that moves up and down the guide rail 4, moves the track chains 3a, 3b intermittently in one direction, and moves the power supply hanger 5 to the liquid tanks 2a, 2b,
2c... Is sequentially moved up and down every
Are immersed in the treatment liquid L in the liquid tanks 2a, 2b, 2c... For a predetermined time, so that the caliper bracket 11 suspended by the holders 8a, 8b and the hook 9 and the caliper body 1
Surface treatment such as degreasing / rust removal or deoxidation / plating / surface coloring / cleaning is performed.

The vertical rails 7a and the horizontal rails 7b of the main body frame 7 immersed in the processing liquid L are formed of a synthetic resin having excellent insulating properties, and the connecting jig 10 which is not immersed in the processing liquid L includes a copper plate or an iron plate. It is formed by a metal conductor. When a vinyl chloride resin, an acrylic resin, or a polypropylene resin is used as a specific synthetic resin material for the vertical rails 7a and the horizontal rails 7b of the main body frame 7, it is lightweight, has rigidity, and has excellent moldability and chemical resistance. Is preferred.

The holders 8a and 8b are provided inside the vertical bars 7a and 7a of the main body frame 7 with a pair of brackets 13a and 13b.
The brackets 13a, 13
b, a rod-shaped hanging tool mounted upward at an angle of about 45 degrees using lock nuts 14a and 14b, and a long conical masking material 15 is provided at the base of the holders 8a and 8b. . The masking material 15 is made of a resilient material such as rubber or soft synthetic resin, and has a tip portion provided with a pin hole 11 of a caliper bracket 11 described later.
The diameter is slightly smaller than a.

One holder 8a is formed of a conductor such as a metal rod. A lead wire 16 is connected to the base end of the holder 8a, and a spring member 17 having a plurality of legs is provided at the tip end.
Is provided with a current-carrying element 19 secured by screws 18.
The other holder 8b is formed of a synthetic resin such as an acrylic stick or a nonconductor such as rubber or gypsum, and can be movably fixed in a horizontally elongated hole 13c formed in the bracket 13b. The pitch between 8a and 8b can be changed according to the size of the caliper bracket 11.

The hook 9 is a U-shaped hanging tool whose base end is fixed to the center of the horizontal rail 7b with bolts 20 and nuts 21 and is vertically suspended from the horizontal rail 7b so that the tip side is upward. The lead wire 22 buried along the inner peripheral surface of the hook 9 is extended to the tip end of the hook 9 protruding upward, and the tip end of the lead wire 22 exposed from the coating layer is fixed to the tip end surface of the hook 9. 9 energizing elements 23.

The energizing element 1 of one holder 8a and hook 9
The lead wires 17 and 22 connected to 9 and 23 are connected to the connecting jig 10 also serving as a power receiving unit, and the rack device 6 for surface treatment descends and sinks into the liquid baths 2b and 2c for plating. At this time, power is supplied from the power supply hanger 5 to the current-carrying elements 19 and 23 through the connecting jig 10.

A pair of small-diameter pin holes 11a (the other is not shown) are formed in the caliper bracket 11, and a large-diameter cylinder hole 12a is formed in the caliper body 12 by casting in the previous step. ing. The pin hole 11a and the cylinder hole 12a are bottomed holes having one end opened and the other end closed by a bottom wall. The caliper bracket 11 has the holders 8a, 8b, and screw 18
Is brought into contact with the bottom wall of the pin hole 11a.
Is elastically contacted with the inner peripheral wall of the pin hole 11a, and the masking material 15 is fitted into the opening of the pin hole 11a.
Is suspended in an inclined state while sealing the inside of the pin hole 11a in a liquid-tight manner.

The caliper body 12 has a cylinder bore 1
The hook 9 is inserted into the cylinder hole 12a with the opening of the cylinder hole 12a facing downward, and the energizing element 23 of the hook 9 is brought into contact with the corner between the bottom wall and the inner peripheral wall of the cylinder hole 12a. Hanged on.

The caliper bracket 11 and the caliper body 12, which are the workpieces of the present embodiment, are mounted when the rack device 6 for surface treatment is located above the liquid tanks 2a, 2b, 2c,. State), holders 8a and 8b and hook 9
, And is suspended in an inclined state as described above. When plating the surfaces of the caliper bracket 11 and the caliper body 12, the power supply hanger 5 is driven to lower the rack devices 6, 6, and the liquid tanks 2 b, 2 c are processed up to the upper part of the main body frame 7. The entirety of the caliper bracket 11 and the caliper body 12 is immersed in the processing liquid L by being immersed in the liquid L.

The caliper bracket 11 suspended from the holders 8a and 8b has the opening of the pin hole 11a sealed in a liquid-tight manner by the masking material 15, so that the processing liquid L is filled in the pin hole 11a. No pin holes 1
1a, the holders 8a and 8b and the energizing element 19 are
Do not soak in. In the caliper body 12 suspended by the hook 9, the compressed air layer A is left in the upper portion of the cylinder hole 12a because the caliper body 12 is immersed in the processing liquid L with the opening of the cylinder hole 12a facing downward. The processing liquid L does not penetrate into all of the holes 12 a, and the tip side of the hook 9 exposed to the air layer A and the conducting element 23 are not immersed in the processing liquid L.

Then, from the power supply hanger 5 to the connecting jig 10
Through one of the holders 8a and the energizing element 1 of the hook 9
By supplying power to the lead wires 16 and 22 connected to the terminals 9 and 23 for a predetermined time, the surfaces of the caliper bracket 11 and the caliper body 12 are plated respectively, and after the plating process is completed, the power supply hanger 5 is driven. The rack devices 6, 6 are raised to positions above the liquid tanks 2b, 2c.

In the liquid tanks 2b and 2c, the surfaces of the caliper bracket 11 and the caliper body 12 are plated in this way, and most of the main body frame 7 is immersed in the processing liquid L for plating. Since the body frame 7 and the hook 9 in the example are formed of an insulating synthetic resin, there is no plating on the surfaces of the body frame 7 and the hook 9.

The one holder 8a is formed of a conductor such as a metal bar. The holder 8a is entirely accommodated in the pin hole 11a of the caliper bracket 11, and is held in the pin hole 11a.
Is sealed with the masking material 15 so that there is no plating adhesion like the main body frame 7 and the hook 9. Further, the other holder 8b is formed of a synthetic resin such as an acrylic rod or a non-conductor such as rubber or gypsum, and has a pin hole 1 of the caliper bracket 11 similarly to the one holder 8a.
Since the liquid sealing is carried out using the masking material 15 in 1a, there is no plating adhesion like the main body frame 7, the hook 9, and the one holder 8a.

In this embodiment, since the unnecessary plating does not adhere to the main body frame 7 of the rack device 6 and does not grow, the original plating process can be preferably performed on the surfaces of the caliper bracket 11 and the caliper body 12. Can be performed.
In addition, since any work such as removing the plating adhered to the unnecessary portion with a file or periodically covering the vinyl chloride sheet is not required, the maintenance of the rack device 6 is extremely easy. Further, one holder 8a
Power is supplied to the energizing elements 19 and 23 of the hook 9 and the main body frame 7.
Therefore, the power loss is eliminated, so that the caliper bracket 11 and the caliper body 12 can be more preferably plated. In addition, by eliminating unnecessary adhesion of plating, it becomes easy to control the amount of the processing liquid L for plating, and the amount of the processing liquid L can be reduced as compared with the conventional one, and the service life can be extended. It is extremely excellent in properties.

In this embodiment, the holders 8a and 8b are arranged to be inclined upward and the tip end of the hook 9 is arranged to be upward, so that the pin holes 11a of the caliper bracket 11 and the caliper body 12 and the cylinder holes 12a are formed. By suspending the opening downward, the energizing elements 19 and 23 in the pin hole 11a and the cylinder hole 12a are
So that the holder 8a,
8b and the current-carrying elements 19 and 23 are free from plating, the current-carrying elements 19 and 23 are not energized, and the suspending tool is attached to the suspending tool as in the conventional case where the suspending tool is inserted into the through hole of the work. Inconveniences such as difficulty in removal and insertion of the plated metal and damage to the plating applied to the surface of the caliper bracket 11 and the caliper body 12 are eliminated.

[0026]

As described above, in the first aspect of the present invention, the body frame of the surface treatment rack device is formed of a synthetic resin, so that even if the body frame is immersed in the plating solution, the body frame can be removed. Plating does not adhere to the surface, and any work such as removing the plating adhered to the body frame with a file or periodically coating the vinyl chloride sheet is not required, making maintenance of rack equipment extremely easy. Not only that, the original plating process can be favorably applied to the surface of the work. In addition, it is easy to control the amount of the processing solution for plating, and the amount of the processing solution is not only smaller than in the past, but also the service life can be extended, so that the economy is extremely excellent.

According to the second aspect of the present invention, a hanging member such as a hook or a holder fixed to the main body frame of the surface treatment rack device is formed of a nonconductor, and an energizing element is provided at a tip end of the hanging member. So that the energizing element contacts the inner wall of the bottomed hole of the work, and the work is suspended with the opening of the bottomed hole facing downward,
By arranging the tip side of the hanging tool upward, plating does not adhere to the surface of the hanging tool even if the hanging tool is immersed in the processing solution for plating. The energizing element is located in the air layer inside the bottomed hole suspended with the opening facing downward and does not immerse in the processing liquid.Therefore, plating should adhere to the surface of the energizing element as well as the hanging tool There is no need for any work such as sanding off the plating on the hanging tool or the current-carrying element, or periodically covering the vinyl chloride sheet, making maintenance of the rack equipment extremely easy. Alternatively, the original plating can be satisfactorily performed on the surface of the work without the loss of electricity.

Further, unlike the conventional case where the suspending tool is inserted into the through hole of the work, the plating adhered to the suspending tool may make it difficult to remove and insert the work or damage the plating applied to the surface of the work. Disappears. Further, it is easy to control the amount of the processing solution for plating, and the amount of the processing solution is not only smaller than in the past, but also the service life can be extended, so that the economic efficiency is extremely excellent.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of a surface treatment rack apparatus according to one embodiment of the present invention, in a state where the rack apparatus is immersed in a treatment liquid.

FIG. 2 is a front view of a surface treatment apparatus showing one embodiment of the present invention.

FIG. 3 is a perspective view of a main part of a surface treatment rack apparatus showing one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Surface treatment apparatus 2a, 2b, 2c ... Liquid tank 3a, 3b ... Track chain 4 ... Guide rail 5 ... Power supply hanger 6 ... Rack apparatus for surface treatment 7 ... Body frame of rack apparatus 6 7a ... Length of body frame 7 Cross bar 7b Horizontal rail 8a, 8b of main body frame 7 Holder (suspension tool of the present invention) 9 Hook (suspension tool of the present invention) 10 Connection jig also serving as power receiving unit 11 Disc brake for vehicle Caliper bracket (work of the present invention) 11a: Pin hole of caliper bracket 11 (bottomed hole of the present invention) 12: Caliper body of disc brake for vehicle (work of the present invention) 12a: Cylinder hole of caliper body 12 (the present invention) 15) Masking material 16, 22 ... Lead wire 17 ... Spring member 18 ... Screw 19, 23 ... Conducting element A ... Air layer L ... Treatment liquid

Claims (2)

[Claims] 1. A hanging tool such as a hook or a holder for hanging a work is fixed to a main body frame, and the main body frame hanging the work on the hanging tool is immersed in a processing liquid in a liquid tank. A surface treatment rack apparatus for performing a surface treatment on the work, wherein the body frame is formed of a synthetic resin. 2. A hanging tool such as a hook or a holder for hanging a workpiece is fixed to a body frame, and the hanging tool is inserted into a bottomed hole of the workpiece to suspend the workpiece. In a surface treatment rack apparatus for immersing a frame in a treatment liquid in a liquid tank and performing surface treatment on the work, the hanging tool is formed of a nonconductor, and the tip of the hanging tool is attached to the work. An energizing element for energizing is provided, and the leading end side of the suspending tool is arranged so that the energizing element contacts the inner wall of the bottomed hole of the work and the work is suspended with the opening of the bottomed hole facing downward. A surface treatment rack device which is disposed upward.