JPH027875Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a plating processing device, and more specifically, it is used in a device for horizontally holding and rotating an object to be plated.

(Prior art and its problems) When plating an object to be plated, such as a stack of piston rings or a cylindrical object, the object to be plated is held around a shaft, and the shaft is vertically placed in a processing tank. The plating process is performed by applying electricity while rotating the shaft. In addition, Japanese Patent Publication No. 57-61840 shows that a pair of rotatable shafts are extended from the outside to the inside of the liquid tank, and both ends of the horizontally arranged object to be plated are supported by the shafts. However, this means is difficult and impossible to hold the covered objects such as stacked rings and cylindrical objects. On the other hand, recently, a dispersion plating process has been performed in which hard substances such as nitrides and carbides are dispersed and co-deposited on the surface of the object to be plated. In this dispersion plating process, in addition to controlling the amount of current applied, it is important to uniformly suspend nitrides, carbides, etc., which serve as dispersants, in the plating solution in order to obtain a high-quality plating layer. For this reason, compressed air is sent from the bottom of the plating tank,
Attempts are made to forcibly stir the dispersion plating solution to uniformly disperse the dispersant in the plating solution. However, in reality, the upper and lower parts of laminated piston rings, cylinders, and other mated objects do not have the same matting layer, but have different amounts of eutectoid deposition, thickness, and strength, resulting in poor product yield. In addition, when the covered object is removed from the liquid tank, the liquid inside the hollow of the cylindrical object or piston ring is difficult to drain. Therefore, the technical problem of the present invention is to solve the problems of the prior art described above.

(Means for Solving the Problems and Their Effects) In order to solve the above-mentioned problems, the present invention basically consists of attaching objects such as stacked piston rings and cylindrical objects through a pair of brackets. A technical means is used in which the jig shaft is suspended horizontally in the liquid tank by a pair of hangers, and one engaging piece of the hanger is movable up and down with respect to the other.

More specifically, the present invention includes a jig shaft arranged concentrically with a mated object such as a stacked piston ring or a cylindrical object and connected to a power source, and a jig shaft arranged at both ends of the mated object. a bracket for holding the object to be plated on the jig shaft and in a freely conductive relationship between the jig shaft and the object to be plated; a pair of hangers that support the jig shaft substantially horizontally; a rotary shaft passing through the hanger; a motor connected to the rotary shaft; a power transmission mechanism connecting the rotary shaft and the jig shaft; a device for raising and lowering the hanger; the hanger raising and lowering device has an engaging piece that is integrated with the hanger and can be freely engaged with and detached from a hook that is spaced apart from the opposite person; one engaging piece is connected to the other engaging piece; Provided is a plating processing device characterized in that it is movable up and down around the engagement point with the plating device.

With this method, the objects to be plated, such as stacked piston rings and cylindrical objects, can be plated by suspending them horizontally in a liquid tank and rotating them. It is possible to obtain a plating layer, and since the jig shaft supporting the object to be plated can be tilted within the liquid tank, the liquid can be drained more reliably than with a perforated bracket.

(Example) A jig 2 for supporting a mated object 1 such as a piston ring includes a shaft 3, a first perforated bracket 4 fixed to the shaft 3, and a second perforated bracket inserted into the shaft 3. It is provided with a bracket 5 and a nut 6 which is screwed onto the shaft 3 in order to hold the object 1 on the shaft 3. For example, when piston rings are used as the fitted object 1, the stacked piston rings are passed through the shaft 3 so as to be in contact with the first bracket 4, the second bracket 5 is applied to the end surface of the piston ring, and the nut is tightened. By tightening 6,
A stack of piston rings is supported by a shaft 3. The shaft 3 and the brackets 4 and 5 are molded from a conductive material, but the brackets 4 and 5 are masked with a non-conductive material except for the portions in contact with the piston ring (fitting) and the nut 6.

The shaft 3 extends to the left and right of the pair of brackets 4 and 5, and is arranged in parallel with the first bracket 4 to fix the gear 7 to the shaft 3, and a stepped first cover member 8 is attached to the right side of the shaft 3. Attach to. On the other hand, a second stepped cover member 9 that covers the nut 6 is attached to the left side of the shaft 3.

The first and second cover members 8, 9 have conductive bushes 10 therein that are in sliding contact with the shaft 3, and the cover members 8, 9 have non-conductive parts except for the inner peripheral surfaces of the bushes 10. Masking of the synthetic resin is done. Alternatively, the cover members 8 and 9 covering the bush 10 may be made of a non-conductive material to prevent electrical leakage from the bush 10 and the shaft 3. cover member 8,
9 is connected to a lead wire 11 passing through it.

The nut 6, the second bracket 5, the gear 7 and the pair of cover members 8, 9 are removable from the shaft 3.

As shown in FIG. 1, a plating object suspension device 13 that can be seated on the side edge of the plating tank 12 is assembled to the plating tank 12. The suspension device 13 consists of a hanger hook 14 and a pair of hangers 15, and the hanger 15 consists of a pair of legs that can extend into the processing tank 12. At the lower end of the hanger 15, a long hole 16 is bored at one end and slightly upward. The step portions of the cover members 8 and 9 inserted into the shaft 3 engage with the long holes of the hanger 15, and the shaft 3 holding the object 1 to be fitted is suspended from the hanger 15. The attached object 1 to the hanger 15 via the shaft 3
Suspension and removal of the suspension device 13 is carried out by taking the suspension device 13 out of the processing tank 12 using a device to be described later.

Rotating shaft 17 passing through the pair of hangers 15
A sprocket 18 is fixed to one end of the sprocket, and a rotary drive chain 19 is engaged with the sprocket 18.
Further, a gear 20 that meshes with the gear 7 of the jig shaft 3 via an intermediate gear is fixed to the rotating shaft 17. Thus, when the chain 19 is driven, the rotating shaft 17 is rotated by the sprocket 18, and the rotating torque is transmitted to the gear 7 fixed to the jig shaft 3 through the intermediate gear, thereby rotating the jig shaft 3. That is, the covered object 1 rotates. At this time, the bush 10 acts as a bearing for the shaft 3, and the cover members 8 and 9 do not rotate.

A power receiving portion 21 is provided on the hanger hook 14, and a lead wire 11 connected to the bush 10 is connected to the power receiving portion 21. The power supply receiver 21 communicates with the negative electrode side of the power source via a terminal (not shown).

As shown in FIG. 2, a pair of anode plates 22 and a shield 23 are arranged inside the processing tank 12, and the anode plates 22 are connected to the positive electrode side of a power source. The coated object 1 suspended from the hanger 15 is in the processing tank 12
When the object 1 is fed into the interior, the object 1 to be plated faces the anode plate 22 with the shield 23 interposed therebetween. In this state, the anode plate 22 is energized,
When the plated object 1 is rotated, the dispersant in the dispersion plating liquid is uniformly eutectoid on the outer peripheral surface of the plated object 1,
A suitable plated layer is obtained.

The hanger lifting device 24, as shown in FIG.
Carrier 26 moving up and down along vertical rail 25
, and from the carrier 26 there is a horizontal arm 27
is extended. At the tip of the arm 27, a hanging piece 29 is provided with a pin 28 that engages with the notch of the hanger hook 14. Arm 27 further includes:
A guide 30 is fixed, a rod 31 is arranged in the hole of the guide 30 so as to be able to rise and fall freely, and an engaging piece 33 having a pin 32 that can be engaged with one notch of the hanger hook 14 is attached to the tip of the rod 31. . A rack 34 extends parallel to the rod 31 from the engaging piece 33, and a pinion 35 is engaged with the rack 34, thereby fixing the pinion 35 to the output shaft of a motor 36 on the arm 27. Thus, when the motor 36 is driven and the pinion 35 is rotated, the rack 34 is raised and lowered, and the engaging piece 33 is raised and lowered by the rod 31 guided by the guide 30, and is moved against the pin 28 of the other hanging piece 29. , the pin 32 of the engagement piece 33 will be vertically displaced relative to each other, causing the hanger 15 and the jig shaft 3 to be tilted.

The mating object 1 on the jig shaft 3 held by the hanger 15 of the suspension device 13 is moved to the carrier 26.
is moved above the plating tank 12 by raising it along the rail 25, and then the motor 36 is driven to shift one side of the hanger 15 up and down relative to the other and tilt the jig shaft 3. The dispersion liquid on the inside and outside surface of the object 1 to be plated can be efficiently drained.

Covered object 1 that has been drained is carrier 2.
6 is moved horizontally to the outside of the processing tank 12, and then from the hanger 15 to the jig shaft 3.
The plated object 1 can be taken out from the jig shaft 3 by releasing the cover members 8, 9 having the bush 10 therein, the gear 7, and the bracket 5 from the jig shaft 3 in order. Next, the plated object 1 to be processed is fixed to the shaft 3 using a bracket 5 and a nut 6, and a gear 7 is attached to the fixed position of the shaft 3.
and cover members 8, 9 are disposed, the stepped portions of the cover members 8, 9 are engaged with the elongated holes 16 of the hanger 15, and the gear 7 is meshed with the intermediate gear. The motor 36 is driven to level the suspension device 13, the carrier 26 is moved horizontally, and the coated object 1 is moved onto the processing tank 12. After that, the carrier 26 is lowered,
As shown in FIG. 2, the object to be plated 1 is immersed in the dispersion liquid, and as described above, the jig shaft 3 is rotated and energized to perform the plating process. 37 in FIG. 2 indicates a perforated pipe for feeding compressed air into the dispersion liquid and stirring it.

(Effects) In the present invention, even though the jig shaft is made rotatable, the shaft can be easily attached to and detached from the hanger, so it is easy to attach and detach an object to be fitted to the jig shaft.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a plating processing apparatus according to an example of the present invention, Fig. 2 is a longitudinal sectional view thereof, Fig. 3 is an exploded perspective view of the area around the jig shaft, and Fig. 4 is a plating device equipped with a liquid draining mechanism. It is a side view showing a lifting device. In the figure, 1... covered object, 3... jig shaft, 7... gear, 8, 9... cover member, 10...
... Bush, 11 ... Lead wire, 12 ... Plating treatment tank, 14 ... Hanger hook, 15 ... Hanger, 16 ... Long hole, 17 ... Rotating shaft, 1
8... Sprocket, 20... Gear, 21... Power receiving section, 22... Anode plate, 24... Lifting device, 26... Carrier, 27... Arm, 29
... hanging piece, 33... engaging piece, 34... rack,
35...Pinion, 36...Motor.

Claims (1)

[Scope of utility model registration request] A jig shaft arranged concentrically with a mated object such as a stacked piston ring or a cylindrical object and connected to a power source, and a jig shaft arranged at both ends of the mated object to connect the mated object a perforated bracket for holding the jig shaft in a conductive relationship between the jig shaft and the object to be plated; It has a pair of horizontally supported hangers, a rotating shaft passing through the hangers, a motor connected to the rotating shaft, a power transmission mechanism connecting the rotating shaft and the jig shaft, and a device for raising and lowering the hangers. The hanger elevating device has an engaging piece that is integral with the hanger and is detachably engaged with a hook that is spaced apart from the opposite person, and that one engaging piece is centered at the engagement point between the other engaging piece and the hook. A plating processing device characterized by being able to be raised and lowered freely.