JPH0115600B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for swinging a horizontal barrel containing a workpiece to be plated, such as a bolt, in a plating liquid.

In FIG. 1, which is a schematic perspective view of a conventional example, the peripheral wall 2 of a horizontal barrel 1 is provided with an opening 3 in its upper part, and the opening 3 forms a workpiece input port and a workpiece discharge port. The barrel end walls 5,5 are provided with a horizontal shaft 6 (only one shown) in the center, one shaft 6 being connected to a rack 9 via a gear train 7 and a pinion 8. The shaft 6, gear train 7, and pinion 8 are attached to a supporter (not shown), and a barrel conveyor (not shown) is adapted to hold the supporter. The rack 9 is attached to an external frame separate from the supporter and the barrel 1, and when the barrel 1 is lowered to a position where it is immersed in a plating tank (not shown), the pinion 8
is designed to mesh with Rack 9. When the rack 9 is reciprocated, the barrel 1 is moved from the illustrated position with the opening 3 directly above it in both directions M, centering on the shaft 6.
The gear train 7 is configured to swing in N direction by, for example, 40 degrees. However, in the conventional product described above, when the barrel 1 is raised after the plating process and the pinion 8 is removed from the rack 9, the barrel 1 is in a state where it can rotate freely. etc., there is a risk that the barrel 1 will be reversed to a position with the opening 3 facing downward due to the weight of the workpiece during barrel transportation, and the workpiece will fall from the opening 3. Therefore, in the conventional product, it is necessary to carry out the work of transporting the barrel 1 extremely carefully, resulting in a problem of low work efficiency. In addition, in order to solve the above problems, some barrels have traditionally been equipped with balance weights, but this increases the overall weight of the barrel, requiring a large amount of power for swinging and transporting, which increases power costs. Increase.

In order to solve the above-mentioned conventional problems, the present invention has the following features:
It uses a crank mechanism to swing the barrel, and is constructed as follows.

That is, the present invention includes a supporter that is held by a conveyance device and is transported between a plating processing position and a workpiece removal position, and a plating processing barrel that has an opening for discharging the workpiece at one location on the peripheral wall,
The barrel is supported by a supporter so as to be rotatable around the central axis in an attitude in which the central axis thereof is horizontal, and a horizontal rotating shaft which is detachably connected to the drive unit at the plating processing position is supported by the supporter. and the barrel are connected via a crank mechanism.

The crank mechanism also includes a rotary shaft side arm whose one end is fixed to a horizontal rotary shaft and extends in the radial direction of the shaft, a barrel side arm which is fixed to the barrel and extends perpendicular to its center line, and both of the arms. an intermediate rod located between the two, a connecting pin that connects both ends of the intermediate rod to the barrel side arm and the rotating shaft side arm, respectively, and a fixing mechanism that releasably fixes the position of the connecting pin in the longitudinal direction of the intermediate rod. is provided.

Then, the length of the rotating shaft side arm is made shorter than the length of the barrel side arm, so that when the position of the connecting pin is fixed by the fixing mechanism, the above-mentioned workpiece can be adjusted in response to continuous rotation of the horizontal rotating shaft. When the barrel swings around its central axis within a predetermined angle range in which the discharge opening faces upward and sideways, and the connecting pin is released from the fixed state by the fixing mechanism,
The barrel can be swung to a range exceeding the above-mentioned predetermined angle range.

Next, embodiments of the present invention will be described with reference to FIGS. 2 to 6.

In FIG. 2, which is a partially cutaway schematic perspective view, the barrel 10 has hexagonal vertical end walls 11, 11';
5 connecting the 5 pairs of opposing sides of the end walls 11, 11'
An opening 13 is formed between the remaining pair of sides of the end walls 11 and 11' where the peripheral wall 12 is not provided. Horizontal support shafts 15, 15' protrude from the center of the outer surface of each end wall 11, 11', and the tips of both shafts 15, 15' are supported by the lower portions of vertically long plate-like supports 16, 17. The supports 16 and 17 are positioned to sandwich the barrel 10 from both sides, and their upper ends are connected to each other by a horizontal member 19.
A hanger 20 projecting upward is attached to the horizontal member 19. Two horizontal rods 21, 21 are provided at the vertical middle part of each supporter 16, 17, respectively.
are placed side by side at the same height. Each rod 21
protrudes in a direction away from the other supports 17 and 16, and is seated on the saddle 23 above the side wall of the plating liquid tank 22 during the plating process shown in FIG. Plating liquid is placed in the tank 22 to the extent that the lower part of the barrel 10 is submerged.

An arm 25 is fixed to the outer surface of one end wall 11 and extends radially outward from the shaft 15. The tip of the arm 25 is connected to the lower end of a vertically long connecting rod 27 via a pin 26 parallel to the shaft 15, and the upper end of the rod 27 is connected to the tip of an arm 29 via a pin 28 parallel to the pin 26. There is. rod 2
7 is located on the outside (closer to the supporter 16) with respect to the arm 25, and the supporter 16 is located with respect to the arm 29.
It is located on the opposite side. The base end of the arm 29 is fixed to one end of a rotating shaft 30 parallel to the shaft 15. The shaft 30 has an intermediate portion connected to the supporter 16 via a bearing.
A sprocket 31 supported on the upper part of the sprocket and fixed at the other end engages with a chain 32 extending generally horizontally from above. The chain 32 is connected to a driving power source (not shown) such as a motor. Note that a sprocket for supporting the chain 32 is also not shown.

In FIG. 3, which is a schematic diagram in the direction of the arrow in FIG. More specifically, the lengths L and l are set so that when the arm 29 rotates around the axis 30, the arm 25 swings up and down by, for example, 80 degrees from the horizontal position. There is. The two-dot chain lines a and b indicate the upper limit position and lower limit position of the arm 25 (center line) during the above-described swinging. The relative positions of the opening 13 and the arm 25 are set so that when the arm 25 is in a horizontal position as shown in FIG. 3, the opening 13 occupies a position open directly above (the uppermost position). Therefore, when the arm 25 and the barrel 10 swing due to the rotation of the shaft 30, the opening plane PP (virtual extension plane) of the opening 13 is only inclined at a maximum of 80 degrees with respect to the horizontal plane, and the opening 13 faces downward. Never.

Next, a mechanism for directing the opening 13 downward when discharging the work will be described. As shown in FIG. 4, which is an enlarged partial view of FIG. 3, the rod 27 has a vertically long elongated hole 35 at its lower end. Figure 4 shows the conditions during plating processing (swinging) and barrel transport.
In this state, the pin 26 is located at the lower end of the elongated hole 35. A pin 36 parallel to the pin 26 is provided above the elongated hole 35, and the upper end of a fan-shaped plate-shaped stopper 37 is swingably connected to the rod 27 via the pin 36. In the state shown in FIG. 4, the stopper 37 hangs directly below the pin 36, and its lower end surface extending in an arc abuts against the pin 26 from above, thereby preventing the pin 26 from moving up and down within the hole 35. It's summery. A spring 38 is provided between the stopper 37 and the rod 27 for holding the stopper 37 in the hanging position shown in FIG.

Furthermore, the workpiece discharge position (barrel 1 after plating process)
The following pusher mechanism is provided at the position where 0 is conveyed. In FIG. 5, which corresponds to the schematic sectional view shown in FIG. 4, two integrated pushers 41 and 42, for example, are connected to a drive mechanism such as a hydraulic cylinder 40 so as to be driven in the horizontal direction. The pusher 41 protrudes further than the pusher 42 in the pushing direction F, and when the rod 27 and the stopper 37 are at the highest position (described later), the pusher 41 faces the side edge of the stopper 37 along a direction perpendicular to and horizontal to the pin 26. However, the pusher 42 is arranged to face the side edge of the rod 27. The vertical positions of the pushers 41 and 42 are as shown in FIG.
In FIG. 6, SS is a plane including both the center lines of the shafts 15 and 30, and the barrel 10 is shown in a state where the swing angle Q is a maximum value of 80 degrees. The arm 25 and rod 27 shown by solid lines are in the position before the start of ejection, and in this position, the arm 25 and rod 27 are in a substantially vertical position and occupy the highest position.
Also, on the opposite side of the opening 13 (sixth
It is located on the right side of the figure. A chain 43 that engages with the sprocket 31 is also provided at the ejection position, and when the barrel 10 is sent to the ejection position, a drive mechanism (not shown) moves the rod 27 and arm 25 along the solid line via the chain 43, sprocket 31, etc. It is designed to move to the highest position indicated by . The pushers 42, 41 are located at the lower end of the rod 27 at the highest position and the stopper 37 (Fig. 4).
It is supported by a frame, etc., not shown, at the same height as and at a position on the right side in FIG. 6 (on the opposite side from the center plane S--S). Furthermore, another pusher mechanism (not shown) is provided on the opposite side of the pushers 41 and 42, sandwiching the rod 27 and stopper 37.

The operation will be explained. In FIG. 2, when arm 29 is rotated by chain 32 via sprocket 31 and shaft 30, rod 27 and arm 25 swing up and down, and barrel 10 swings around shaft 15. Due to the rocking, the plating liquid inside the barrel 10 and the plating liquid outside the barrel 10 are exchanged through many holes (not shown) in the barrel wall, and many small workpieces inside the barrel 10 also change their posture. The entire surface is sequentially contacted with the plating solution. As already mentioned in connection with FIG. 3, the vibration during the plating process is caused by
This is done within the range where the opening plane P-P is tilted up to 80 degrees in both directions M and N from a horizontal position facing upward (facing sideways).

When the plating process is completed, the hanger 20 is locked and pulled up by a conveying device (not shown), the sprocket 31 is removed from the chain 32 which is being driven, and the swinging of the barrel 10 is thereby stopped. Also, the lifted barrel 10 is the supporter 1
6 and 17, the workpiece is transported to the workpiece discharge position by the transporting device. The opening 13 will not face downward during the conveyance operation. That is, as described above, when the arm 29 rotates, the barrel 10 swings only within the range where the opening 13 faces upward and sideways, so the barrel 10 cannot swing to a position where the opening 13 faces downward. , such downward swinging is prevented by the arm 29 and shaft 30. Therefore, falling of the workpiece from the opening 13 is reliably prevented.

When the barrel 10 and the supports 16 and 17 are installed at the workpiece discharge position, the sprocket 31 engages with the chain 43 as shown in Fig. 6, and the chain 43 moves the rod 27 and arm 25 to the highest position shown by the solid line and then stops once. do. Next, the pushers 41 and 42 shown in FIG. 5 protrude. Of the pushers 41 and 42, the pusher 41 first pushes the stopper 37 and moves it to a position where the elongated hole 35 in FIG. Next, the pusher 42 pushes the arm 27.
Then, the pin 26 relatively rises inside the elongated hole 35, and the rod 27 and arm 25 in FIG.
The rod 27' and the arm 25' are bent in the opposite direction from the position shown by the solid line to the center plane SS as shown by two-dot chain lines 27' and 25', and the rod 27' and the arm 25' are
Occupies a position close to 3. Next, the chain 43 is temporarily activated, causing the shaft 30 and the arm 29 (Fig. 3) to rotate approximately 1/4, and the arm 25' to rotate downward (in the upward direction M during normal rocking) and approximately The position is horizontal, the opening 13 faces downward, and the workpiece falls from the opening 13 to the receiving device below. When the discharge of the workpiece is completed, each part operates in reverse, and the rod 27' and arm 25' return to the solid line position in Fig. 4 or a position lower than that position, and the next swinging operation (plating process) can be performed. state. During the return stroke, a pusher (not shown) operates against the rod 27' and stopper 37' in a direction opposite to that of the pushers 42, 41. The above operations are automatically performed using a limit switch, a timer, etc. (not shown).

As explained above, according to the present invention, the barrel 1
As a mechanism for swinging the 0, a crank mechanism consisting of a rotating shaft side arm 29, a barrel side arm 25, an intermediate rod 27 connecting the two, etc. is provided,
By appropriately selecting the lengths of these arms, the barrel 10 can swing only within a predetermined angular range in which the opening 13 faces upward and sideways in response to the continuous rotational movement of the arm 29 and the rotating shaft 30. At the same time, these crank mechanisms are attached to supports 16 and 17 together with the barrel 10.

Therefore, even when transporting the barrel 10 together with the supports 16 and 17, the entire crank mechanism is attached to the barrel 1.
0, thereby preventing the barrel 10 from being reversed downward by the crank mechanism. In this way, there is no fear that the opening 13 will be directed downward during transportation, so there is no need to carry out the transportation work very carefully, and work efficiency can be improved. Furthermore, since there is no need to attach a balance weight, the weight of the entire barrel can be prevented from increasing, and the power cost for swinging the barrel can be reduced.

Furthermore, since the driving arm 29 and rotating shaft 30 of the crank mechanism need only be rotated continuously, the structure and control system of the driving section (chain 32 in the embodiment) can be simplified and the cost of the device can be reduced.

Moreover, in the present invention, the crank mechanism is provided with a fixing mechanism (stopper 37, etc.) that releasably fixes the position of the end connecting pin 26 of the rod 27, and by releasing the fixing mechanism, The rod's longitudinal position can be changed.

The length of the rotating shaft side arm 29 is made shorter than the length of the barrel side arm 25, so that when the position of the connecting pin 26 is fixed by the fixing mechanism, continuous rotation of the horizontal rotating shaft is supported. When the barrel 10 swings within the predetermined angular range and the connecting pin 26 is released from the fixed state by the fixing mechanism, the barrel 10 swings within the predetermined angular range.
0 can be oscillated.

Therefore, by simply releasing the fixing mechanism, the barrel 10 can be rotated to a position where the opening 13 faces downward, and the work to discharge the workpiece from the opening 13 can be easily performed.

Moreover, since the fixing mechanism, that is, the mechanism for switching the rotation range of the barrel 10 between a predetermined range and a range exceeding the predetermined range, is built into the crank mechanism, such a mechanism is not called a drive mechanism (crank mechanism). The structure can be simplified compared to the case where it is provided independently.

[Brief explanation of drawings]

1 is a schematic perspective view of a conventional example, FIG. 2 is a partially cutaway schematic perspective view of an embodiment of the present invention, FIG. 3 is a schematic view of FIG. The figure is a cross-sectional view of FIG. 4, and FIG. 6 is a schematic side view at the discharge position. 10... Barrel, 13...
Opening, 15... Horizontal axis, 16, 17... Supporter, 25... Barrel side arm, 26... Connection pin, 27... Intermediate rod, 29... Rotating shaft side arm, 30... Rotating shaft, 37... ...stopper (fixing mechanism).

Claims (1)

[Claims] 1. A supporter that is held by a transport device and is transported between a plating processing position and a workpiece removal position, and a plating processing barrel that has an opening for discharging the workpiece at one location on the peripheral wall, and the barrel is arranged so that its central axis is horizontal. A horizontal rotating shaft is supported by a supporter so as to be rotatable around the central axis in a posture such that the horizontal rotating shaft is detachably connected to the drive unit at the plating processing position, and the horizontal rotating shaft and the barrel are connected via a crank mechanism. a rotating shaft-side arm that is connected to the crank mechanism and has one end fixed to a horizontal rotating shaft and extends in the radial direction of the shaft; a barrel-side arm that is fixed to the barrel and extends perpendicular to its center line;
An intermediate rod located between the two arms, a connecting pin that connects both ends of the intermediate rod to the barrel side arm and the rotating shaft side arm, respectively, and the position of the connecting pin in the longitudinal direction of the intermediate rod is releasably fixed. By providing a fixing mechanism and making the length of the rotating shaft side arm shorter than the length of the barrel side arm, it is possible to support continuous rotation of the horizontal rotating shaft when the position of the connecting pin is fixed by the fixing mechanism. The barrel swings about its central axis only within a predetermined angle range in which the work discharge opening faces upward and sideways, and when the connecting pin is released from the fixed state by the fixing mechanism, the barrel swings within the predetermined angle range. A rocking device for a barrel for plating processing, characterized in that the barrel can be rocked to a range exceeding the range.