JPS644845Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a power supply device for conveying a plate-like workpiece, which is suitable for a plating processing apparatus for printed circuit boards and the like.

(Prior Art) Conventionally, in this type of apparatus, a plurality of plate-shaped workpieces are arranged on the same plane and attached to a frame-shaped jig, and the workpieces are immersed together with the jig in a plating bath. However, with conventional products, a plating layer is also formed on the contact area of the power supply terminal connected to each workpiece, so it is necessary to peel off the excess plating on the power supply terminal part from the workpiece after the plating process, which is a time-consuming process. There is a problem that it takes. Moreover, in the conventional jig, it is necessary to separately attach a holder (plate spring) for fixing the workpiece and a power supply terminal to the workpiece, and there is a problem in that the attachment work is also time-consuming.

(Purpose of the invention) In order to solve the above-mentioned problems, the present invention attempts to provide a device in which a clamp for holding a workpiece is also used as a terminal for power supply.

(Structure of the invention) The present invention includes a plurality of clamps arranged in a moving part for transporting the workpiece at intervals in the workpiece transporting direction, and the upper edge of the vertical plate-shaped workpiece is clamped by the clamps. The pressure contact part of the clamp that presses against the workpiece forms a power supply terminal for power supply to the workpiece, and each clamp has a pair of arms that are movable relative to each other, and both arms are placed at a clamping position where the workpiece is held and when the workpiece is released. A cam for moving the cam relatively to and from the release position and a rotatable rod-shaped handle for operating the cam are provided, and each rod-shaped handle is positioned on the same side with respect to both arms. It is a feature.

(Example) In FIG. 1, which is a schematic plan view, a plurality of pre-treatment tanks 1, plating tanks 2, and post-treatment tanks 3 are arranged in series, and constitute a processing tank group 4 as a whole. The pre-treatment tank 1 and the post-treatment tank 3 are specifically composed of a washing tank, a neutralization tank, a recovery tank, etc., and the plating tank 2 is specifically a nickel plating tank, a gold strike tank, and a gold plating tank. It is configured. A transport mechanism 5 is provided above the processing tank group 4 over its entire length.
As will be described later, the transport mechanism 5 transports the work in the direction of arrow F along the longitudinal direction of the processing tank group 4, and loads the workpieces at the upstream and downstream ends of the processing tank group 4, respectively, when viewed in the transport direction F. station 6
(workpiece attachment part) and unloading station 7
(workpiece removal area) is provided. In the illustrated embodiment, an endless chain is used in the transport mechanism 5, and the processing tanks 1, 2, and 3 are arranged in a line, so that the workpieces pass through the processing tanks 1, 2, and 3 only when being transported in the direction of arrow F. However, processing tanks 1, 2, and 3 should be arranged in two rows so that workpieces pass through processing tanks 1, 2, and 3 during the reciprocating stroke (in the direction of arrow F and reverse arrow F). You can also do it.

In FIG. 2, which is an enlarged cross-sectional view of FIG. 1, the plating tank 2 is installed on a frame 8. A pair of side walls 9 (walls extending along the conveyance direction F in FIG. 1) of the plating tank 2 are provided with a wall surface 10 projecting outward and upward at the top thereof.
Plating tank pocket 2a for overflow
is formed. The pocket 2a is connected to a frame pipe 11 below the plating tank 2 via a passage (not shown). The lower part of the pipe 11 enters into a receiving tank 12, and the inlet of a circulation pump 13 is connected to the receiving tank 12. The circulation pump 13 is provided near the plating tank 2, and its outlet is connected to the passage 13a.
It is connected to a pair of pipes 14 via. The pipe 14 extends horizontally along the bottom of the plating tank 2 along the side wall 9, and the lower ends of vertical pipes 15 are connected to a plurality of locations of the pipe 14. The pipes 15 are arranged in two rows along the longitudinal direction of the side wall 9.
As will be described later, the workpiece W is conveyed in a vertical position between two rows of pipes 15, and each pipe 15 is provided with a plurality of nozzles for ejecting plating liquid toward the workpiece W. .

As is clear from the above description, the plating process can be sped up by spouting the plating liquid from the nozzle of the pipe 15 toward the workpiece W.
Further, the plating liquid overflowing from the side wall 9 flows into the plating tank pocket 2a, and from the pocket 2a the plating liquid flows into the pipe 11,
Returns to the circulation pump 13 via the receiving tank 12, and from the circulation pump 13 to the passage 13a, the pipe 14, and the pipe 15.
After that, it is again injected towards the workpiece W. A lid 2b is provided on the wall surface 10 to close the opening at the upper end of the plating tank 2. Further, an exhaust duct 2c is attached to one wall surface 10 and communicates with the inside of the plating tank 2 and extends upward.

The conveyance mechanism 5 is attached to a frame 16 extending above the plating tank 2, and is specifically constructed as follows. Figure 3 is an enlarged partial view of Figure 2.
In the figure, a bracket 17 is attached to the upper and lower surface of the frame 16, and a chain case 18 is supported by the bracket 17. The chain case 18 is a rail-shaped member having a generally rectangular cross section, and extends along the entire length of the processing tank group 4 (FIG. 1).
is designed to run while being guided by rollers 19a. The upper end of a chain plate 20 bent in a generally U-shape is attached to the upper surface of the chain 19. The upper end of an arm 21 extending vertically is fixed to the lower end of the chain plate 20, and a clamp 22 for holding a workpiece W, which will be described later, is attached to the lower end of the arm 21.

The upper ends of a power supply member 23 on the positive power supply side and power supply members 24 and 25 on the negative power supply side are attached to the frame 16. The power supply member 23 extends to near the top of the plating tank 2 on both sides of the arm 21 . An electrode plate 26 is provided in the plating tank 2 between the side walls 9 and the pipe 15, and the lower end of the power supply member 23 is connected to the electrode plate 26. The lower ends of the power supply members 24 and 25 are located on both sides of the upper part of the arm 21 and are adapted to come into contact with a carbon brush 27 attached to the arm 21. The lid 2b is provided with a slit through which the power supply member 23 and the arm 21 pass. Note that either one of the power supply members 24 and 25 may be eliminated.

As shown in FIG. 4, which is an enlarged partial view of FIG. 3, the clamp 22 includes two vertical arms 30, 31. Pins 32 made of stainless steel or the like are driven concentrically into the lower ends of the arms 30 and 31.
A pressure contact portion 33 is formed by the head portion of 2. The pressure contact part 33 is a part for holding the upper edge of the workpiece W from both sides, and the workpiece W held by the pressure contact part 33
is vertical and its surface is parallel to the conveying direction F (FIG. 1). A plate-shaped stopper 34 is fixed to the arm 30 near the upper side of the pin 32. The stopper 34 is a member for determining the upper limit position of the workpiece W, and protrudes to the vicinity of the arm 31 to prevent the workpiece W from moving above the stopper 34. A horizontal pin 35 is fitted and fixed in a hole in the arm 30 above the stopper 34. The pin 35 extends perpendicularly to the workpiece W and slidably passes through the hole in the arm 31. A pin 36 that is horizontal and parallel to the surface of the work W is attached to the tip of the pin 35, and a cam 37 is rotatably connected to the pin 35 via the pin 36. A rod-shaped handle 38 is attached to the cam 37.
is installed.

As shown in the figure, when the handle 38 is horizontal and tilted away from the arm 31, the cam 37 is not pushing the arm 31, and a relatively wide gap is formed between the pressure contact parts 33. When the handle 38 is turned upward from this state to the vertical position shown by the two-dot chain line 38a, the cam 37 pushes the arm 31 toward the arm 30, and the workpiece W can be sandwiched between the pressure contact parts 33. In order to enable movement of the arm 31, the upper end of the arm 31 is bolted to a member 41 via a leaf spring-like member 40. The member 41 is fixed to the lower end of the arm 21, and the member 40 and the arm 3 are attached to both sides of the member 41.
0 is fixed with a bolt 42.

As shown in FIG. 5, which is a view taken from the - arrow in FIG. 4, the member 41 extends along the upper edge of the workpiece W, and its intermediate portion is bolted to the arm 21. A pair of the arms 30 and the member 40 are fixed to both ends of the member 41. The carbon brush 27 is fixed to both ends of a member 43 parallel to the member 41, and the intermediate portion of this member 43 is also bolted to the arm 21. The arms 21, 30 and member 41 are made of copper, the member 40 is made of phosphor bronze, and the arm 31 is made of stainless steel, and all of them are coated.

As shown in FIG. 1, partition walls 50 are provided at the upstream and downstream ends of the plating tank 2. A guide 51 and a seal mechanism 52 are provided on the upstream and downstream sides of the partition wall 50, respectively. As shown in FIG. 6, which is an enlarged partial view of FIG. 1, the partition wall 50 is provided with an inlet 53 (or outlet) in the form of a vertically long slit at the middle portion in the width direction. The guide 51 has a plate shape, is fixed to the upstream side surface of the partition wall 50 and the peripheral edge of the inlet 53 when viewed in the transport direction F, and is provided with an inclined protrusion 55 for guiding the workpiece, which opens toward the upstream side. . The sealing mechanism 52 includes a pair of vertical pinch rollers 5 located on both sides of the workpiece W.
6 and a case 57 that supports the roller 56. The case 57 has a wall surface 58 fixed to the partition wall 50 and a wall surface 59 surrounding the roller 56 from the side wall 9 side.
and a wall surface 60 surrounding the roller 56 from the side opposite to the wall surface 58. The outer peripheral surface of the roller 56 is in slidable contact with the inner surfaces of the wall surface 58 and the wall surface 60, and a generally sealed state is maintained at these contact portions.

As shown in Fig. 7, which is a cross-sectional view of Fig. 6, the roller 56 is constructed by covering the outer surface (outer peripheral surface and both upper and lower end surfaces) of a hollow metal body 61 with a soft elastic outer shell 62 having a rubber hardness of 50 or less. The outer shell 62 is made of natural rubber to prevent corrosion by the processing liquid. The upper and lower end surfaces of the roller 56 (outer shell 62) are also in slidable contact with the top wall 63 and bottom wall 64 of the case 57 in a sealed state. The roller 56 has vertical shafts 66, 67 protruding downward and upward.
The lower shaft 66 is fitted to the case 57.
The shaft 66 is supported by a bearing 68 fixed to the frame.
7, the right-hand shaft 67 protrudes above the bearing 70, and a drive mechanism 71 (described later) is connected to its upper end. As is clear from the above description, the pair of rollers 56 and the case 57 are configured as a single unit, and the seal mechanism 52 can be easily installed by fixing this unit to the partition wall 50 in FIG. 6.

When one roller 56 is rotated via the shaft 67 by the drive mechanism 71, the shaft 66
The other roller 56 rotates in the opposite direction via the gear 69 and the pair of rollers 56 can sandwich and convey the workpiece W. and roller 56
The workpiece W is moved at the same speed as the workpiece conveyance speed by the conveyance mechanism 5 (FIG. 2), and for this purpose, a DC motor is used as the drive mechanism 71 in FIG. Moreover, instead of this DC motor, the following mechanism can also be adopted.
That is, in FIG. 3, the sprocket 72 that meshes with the chain 19 is placed on the side of the chain 19,
The vertical shaft 73 of the sprocket 72 may be connected to the shaft 67 of FIG. 7, for example, via a universal joint or a reduction mechanism (both not shown).

As shown in Fig. 1, the partition walls 5 of the pre-treatment tank 1 and the post-treatment tank 3
0 is also provided with a slit-shaped entrance/exit for the workpiece W to pass through, so that the workpiece W only needs to be transported in the horizontal direction (F) in the pretreatment tank 1 and the posttreatment tank 3 as well. Further, although the sealing mechanism 52 is provided only in the plating tank 2, the guide 51 is also provided in the pre-treatment tank 1 and the post-treatment tank 3. In the pre-treatment tank 1 and the post-treatment tank 3, vertical pipes 75 having shower nozzles are arranged on both sides of the part through which the workpiece W passes, and water or treatment liquid is sprayed from the pipe 75 toward both sides of the workpiece W. It's summery.

(Operation) A series of processing is performed by horizontally transporting the work W by the transport mechanism 5 and passing it through the pre-processing tank 1, the plating tank 2, and the post-processing tank 3. In this conveyance work, the upper edge of the workpiece W is clamped using the clamp 22 shown in FIG.
This is done by holding the arm 21 between the arms and moving the arm 21 with the chain 19 in this state. In addition, in the plating tank 2, the power supply plate 26 is connected from the power supply member 23 to the power supply plate 26.
At the same time, power is supplied to the arm 21 from the power supply members 24 and 25 via the brush 27, and from the arm 21 to the member 41 in FIG. 4, the arms 30 and 31,
Power is supplied to the workpiece W via the pin 32. In this power supply operation, power is supplied to the workpiece W.
The pressure welding is performed from the pressure welding part 33 that is in pressure contact with the plating liquid, and since the pressure welding part 33 is located above or approximately at the same position as the level L of the plating liquid, the workpiece W that the pressure welding part 33 comes into pressure contact with is
No plating layer is formed on the parts. The plating liquid in the plating tank 2 tries to flow out from the inlet 53 shown in FIG. Therefore, leakage of plating solution is almost completely prevented. Although the roller 56 is in pressure contact with the workpiece W, the outer skin 62 of the roller 56 is made of rubber, and since the roller 56 rotates in synchronization with the conveyance operation of the workpiece W by the device 5, the roller 56 is in pressure contact with the workpiece W. It will not damage the workpiece W.

(Effect of the invention) As explained above, according to the invention, the work W
Clamp 22 on the moving part for transportation (arm 21, etc.)
The upper edge of the workpiece W is clamped by the clamp 22, and the pressure contact part 33 of the clamp 22 that presses against the workpiece W forms a power supply terminal for power supply to the workpiece, so that the power supply terminal mounting part of the workpiece W is plated. is never formed. Therefore, there is no need for extra plating removal work, and the efficiency of plating processing work can be improved. Further, since it is not necessary to separately perform the work of attaching the power supply terminal to the workpiece W and the work of attaching the holder (clamp 22), work efficiency can be improved in this respect as well.

Furthermore, in the present invention, each clamp 22 has a pair of arms 30, 31 that are movable relative to each other, and both arms 30, 31 are moved between a clamping position where the workpiece W is clamped and a release position where the workpiece W is released. A cam 37 for relatively moving the cam 37 and a rotatable rod-shaped handle 38 for operating the cam 37 are provided, and each rod-shaped handle 38 is positioned on the same side with respect to both arms 30 and 31. .

Therefore, in the work of attaching the workpiece W to the clamp 22, the workpiece W is inserted between the two arms 30 and 31 while the arms 30 and 31 are maintained in the released position, and then the handle 38 is operated to close the two arms. 30,
By relatively moving 31 to the clamping position, attachment of the workpiece W is completed.

In this way, there is no need to forcibly push the workpiece W into the clamp 22 when attaching the workpiece W, so there is no possibility that the workpiece W will be damaged.

Moreover, all the handles 38 are the arms 30, 3
1, the operator can easily operate the handle 38.

In addition, since the workpiece W is attached to the clamp 22 by operating the rotary handle 38, it is necessary to check whether the workpiece W is securely attached using the handle 38.
The position can be confirmed visually, increasing the reliability of the installation work.

[Brief explanation of drawings]

1 is a schematic plan view of the embodiment, FIG. 2 is an enlarged cross-sectional view of FIG. 1, FIG. 3 is an enlarged partial view of FIG. 2, FIG. 4 is an enlarged partial view of FIG. 3, and FIG. is the fourth
6 is an enlarged partial view of FIG. 1, and FIG. 7 is a sectional view of FIG. 6. 21...Arm (moving part), 22...Clamp,
33... Pressure welding part, W... Work.

Claims (1)

[Scope of utility model registration request] A plurality of clamps are provided in the moving part for transporting the workpiece, arranged at intervals in the workpiece transport direction, and the upper edge of the vertical plate-shaped workpiece is held by the clamps, and the pressure contact part of the clamp that presses against the workpiece In addition to forming a power supply terminal for supplying power to the workpiece, each clamp has a pair of arms that are movable relative to each other, and both arms are movable relative to each other between a clamping position where the workpiece is clamped and a release position where the workpiece is released. A plate-shaped workpiece for plating processing, characterized in that it is provided with a cam for moving the cam and a rotatable rod-shaped handle for operating the cam, and each rod-shaped handle is positioned on the same side with respect to both arms. transport power supply device.