JPH0361760B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a plating processing apparatus used for plating printed circuit boards and the like.

(Prior art) Generally, in this seed plating device, a self-propelled transport mechanism is provided above the plating tanks arranged in a row, and the workpieces (for example, printed circuit board materials) are suspended by hangers of the transport mechanism, and transferred to various processing tanks. A structure in which the water is soaked in the water in sequence is adopted accordingly. However, when the transport mechanism is installed above the processing tank in this way, there is a problem in that dust and dust fall from the transport mechanism into the processing tank, thereby contaminating the processing liquid. There is also the problem that the ceiling of the workshop must be raised, which increases equipment costs.

As a countermeasure to this problem, a cantilever structure in which the transport device is placed only on the side of the processing tank has already been proposed.
In the conventional structure, when two workpiece holding racks are attached to one apparatus, there are problems in that it is difficult to freely adjust the interval between the two racks and it is difficult to detect the workpiece inside the rack.

(Objective of the Invention) In order to solve the above-mentioned problems, the present invention aims to make various improvements to a plating processing device having a cantilevered structure.

(Structure of the Invention) The present invention arranges a large number of processing tanks in a line to form a processing tank group, provides a moving mechanism on one side of the processing tank group to move in the longitudinal direction, and provides an upwardly protruding mechanism for the moving mechanism. A lifting mechanism is provided, a rack support mechanism is made to protrude above the processing tank from the lifting mechanism, and a fixed rack support part, a movable rack support part, and a drive mechanism for the movable rack support part are connected to the rack support mechanism. established,
The present invention is characterized in that a workpiece detector is provided adjacent to the fixed rack support, and the workpiece on the rack supported by the fixed rack support is detected by the workpiece detector.

(Example) In FIG. 1, which is a schematic vertical cross-sectional view, the base 1
A large number of processing tanks 2 (only one shown) are installed in a row on the top, and although not shown, the large number of processing tanks 2 form a long processing tank group in the direction perpendicular to the plane of the paper in FIG. ing. A frame 4 for a cart 3 is provided on the base 1 on the left side of the processing tank 2 in FIG. A rail 5 is attached to the upper end of the frame 4.
is installed. The trolley 3 is located at approximately the same height as the upper half of the processing tank 2, and has tires 6 and rollers 7 at its lower end.
It is equipped with The tires 6 run on the upper surface of the rail 5, and the rollers 7 grip the rail 5 from both sides. The rails 5 extend in the longitudinal direction of the processing tank group, and the trolley 3 can move along the entire length of the processing tank group.

The lower end of a vertical column 9 is attached to the upper end of the truck 3. A vertical support 10 is attached to the base 1 and extends along the column 9, and a rail 12 is attached to the upper end of the support via a bracket 11. The rail 12 extends parallel to the rail 5,
Guide rollers 13 running on both sides of the rail 12 are provided at the upper end of the column 9.

Column 9 has a slider 15 and rollers 16 and 17.
It is installed so that it can be raised and lowered freely. A base end portion of an arm 18 is fixed to the slider 15. The arm 18 extends horizontally in the width direction of the processing tank 2 (in the left-right direction in FIG. 1), and its tip is located above the substantially central portion of the processing tank 2. The tip of the arm 18 and the upper end of the slider 15 are connected by a support stay 19. Furthermore, a pair of left and right movable hooks 20 are attached to the tip of the arm 18.
A motor 21 for moving the hook 20 is attached to the upper surface of the proximal end of the hook 8 .

The pair of hooks 20 protrude downward from the arm 18 at intervals in the width direction of the processing tank 2, and are provided at their lower ends with engaging portions 22 that protrude outward (to opposite sides). At the lowering position N shown by the solid line,
A pair of hooks 26 of a carrier bar 25 are located on the outside of both hooks 20. Carrier bar 25
is a member extending in the width direction of the processing tank 2, and both hooks 2
6 has its lower end fixed to a central portion of the carrier bar 25 at a distance. An engaging portion 27 that protrudes toward the hook 20 is provided at the upper end of the hook 26, and a V-shaped recess (not shown) on the upper surface of the engaging portion 22 is provided at the upper end of the hook 26.
This allows the engaging portion 27 to be engaged and held from below.

Both ends of the carrier bar 25 protrude to the sides of the processing tank 2, and when a plate-shaped work W such as a printed circuit board material is immersed in the processing tank 2 as shown by the solid line, both ends of the carrier bar 25 are seated on the saddle 28. are doing. Saddle 28 is rocking bar 29,
It is supported by a frame 32 on the base 1 via rollers 30 and brackets 31.

The upper end of a picture frame rack 33 is fixed to the carrier bar 25 between each hook 26 and the saddle 28. The rack 33 holds the workpiece W in two stages, for example, upper and lower, surrounding the workpiece W, and the workpiece W is in a posture with its surface vertical and parallel to the width direction of the processing tank 2.

In FIG. 2, which is a schematic enlarged view of a portion of FIG. A pair of chains 3 are attached to the top of the trolley 3.
A motor 38 and a speed reducer 39 are provided for driving the motor 7. An output shaft 40 of the reducer 39 is parallel to the workpiece transport direction F (longitudinal direction of the processing tank group), and the lower end of the chain 37 is suspended between sprockets 41 attached to both ends of the output shaft 40. chain 3
7 extends vertically along the column 9, and its upper end is wrapped around the guide sprocket 42. A pair of columns 9 are provided at intervals in the transport direction F, and a support shaft 44 of a sprocket 42 is supported by a bracket 43 that connects the upper ends of both columns 9 via a bearing. The slider 15 is connected to both columns 9, 9.
Both ends of each chain 37 are connected to the slider 15 via a chain hook 45. Further, the rollers 16 and 17 of the slider 15 are respectively engaged with the guide grooves of each column 9 at two upper and lower positions.

As shown in FIG. 3, which is an enlarged partial view of FIG.
multiple locations are connected to each other. Part 4
The intermediate portion of 6 supports a shaft 48 via a bearing 47. The shaft 48 is parallel to the arm 18, and its base end is connected to the motor 21 via a speed reducer. A pinion gear 50 is fixed to the tip of the shaft 48 and a portion near the tip. The lower end of each gear 50 meshes with a rack 51. Both racks 51 extend parallel to the member 46 and are each fixed to the movable hook 20 via a bracket 52. Each hook 20 also has a member 46.
It is supported by the arm 18 via a shaft 55 parallel to the following.

As shown in FIG. 4, which is a cross-sectional view of FIG.
3 is fixed, and two shafts 5 are connected to each other via a bracket 54 by the upper and lower parts of both supports 53.
5 is attached parallel to member 46. The upper and lower parts of the movable hook 20 are slidably supported on both shafts 55 via bearings 56, and a fixed hook 57 is immovably fixed. Fixed hook 5
7 is located adjacent to one support 53.
In the illustrated state, the movable hook 20 is in a position adjacent to the other support 53, and the movable hook 20 is located adjacent to the other support 53.
1 extends from near the hook 20 to below the gear 50.

As shown in FIG. 3, a pair of fixing hooks 57 are also provided. The hook 57 has the same structure as the hook 20 except that it is fixed to the shaft 55.
A carrier bar 25 whose lower end is separate from the hook 20
It is designed to hang.

A sensor 60 is provided near the hook 57 and on the opposite side from the hook 20. The sensor 60 is located behind the fixing hook 57 and the arm 18 and near the slider 15 when viewed in the transport direction F, and is also located above the processing tank 2 as shown in FIG. sensor 6
0 is attached to the tip of a bending arm 61 fixed to the upper surface of the truck 3. The arm 61 is configured to be extendable and retractable in a direction parallel to the arm 18 and in an up-down direction, so that the up-down position and the left-right position of the sensor 60 can be adjusted.

(Function) In FIG. 2, when the tires 6 are driven by the motor 35 via the reducer 36, the truck 3 travels on the rail 5, and the column 9 and slider 15 are moved together with the truck 3 in the transport direction F or in the opposite direction. Move to. When the motor 38 operates, the chain 37 is driven via the reducer 39 and the sprocket 41, and the chain 37 drives the slider 15 and the arm 18 in FIG.
etc. are raised and lowered. Actually, by combining these operations, the workpiece W is transported as follows.

The rack 33 on which the work W has been attached is suspended by the hook 20, and is conveyed by the movement of the cart 3 to a raised position M shown by a two-dot chain line above the processing tank 2. Next, the slider 15 descends to the lowered position N shown by the solid line, the workpiece W is immersed in the processing liquid in the processing tank 2, and the carrier bar 25 is seated on the saddle 28. The workpiece W is left in this state for a certain period of time, during which time the cart 3 moves forward slightly and then the slider 1 moves forward.
5 may be raised and moved to another location to carry out transport operations for other carrier bars. After a certain period of time has elapsed, the hook 20 rises from the lowered position N, lifts up the carrier bar 25, and then moves to the top of the next treatment tank, and thereafter the same dipping operation is repeated and the work W is subjected to the next treatment. Ru.

In the above operation, the front and back width L of the processing tank 2 (Fig. 4)
3 is small, the gear 50 is driven by the motor 21 shown in FIG. 3 via the shaft 48 shown in FIG. Moving. As a result, the distance between hooks 20 and 57,
That is, the front-to-back distance S between the two works W, W is adjusted in accordance with the front-to-back width L of the processing tank. Even when it is necessary to set the front-to-back distance S of the workpiece large due to various conditions, the distance S is adjusted in the same way.

The workpiece W moves from the raised position M to the lowered position N in Figure 1.
When descending to M, the sensor 60 detects the ascending position M.
The presence or absence of the workpiece W in the rack 33 is detected, and when the presence of the workpiece W is detected, the entire workpiece W is immersed in the processing tank 2, and then a current is passed through the processing tank 2. In this detection operation, the fixed hook 57
Since the sensor 60 detects the workpiece W suspended from the sensor 60, the distance between the workpiece W and the sensor 60 does not change even if the distance S between the front and rear of the workpiece is changed as described above. Therefore, the sensor 60 can always accurately detect the workpiece W.

During the above operation, the trolley 3 and slider 15 in Fig.
Although foreign substances such as dust and dirt fall from the movable parts of the processing tank 2 and the like, since these movable parts are located on the sides of the processing tank 2, foreign substances do not fall into the processing tank 2. Therefore, the processing liquid (plating liquid, neutralizing liquid, etc.) in the processing tank 2
will not be contaminated by foreign matter.

(Effects of the Invention) As explained above, according to the present invention, the cart 3 (moving mechanism) that moves in the longitudinal direction is provided on one side of the two groups of treatment tanks arranged in a row, and the cart 3 is provided with a moving mechanism that moves upward. Protruding column 9 and slider 15
Since the arm 18 (rack support mechanism) from the slider 15 (equipped with an elevating mechanism) protrudes upward from the processing tank 2, foreign matter such as dirt and dust that has fallen from the movable parts such as the cart 3 and the slider 15 can be removed. It will not fall into the processing tank 2. Therefore, the processing liquid in the processing tank 2 is not contaminated by foreign matter, and the quality of plating can be improved, as well as the durability of the processing liquid. Additionally, the ceiling of the workshop can be lowered, reducing equipment costs. Moreover, fixed hook 5
Since a movable hook 20 is provided in addition to 7, the distance S between the front and back of the workpiece can be freely adjusted in response to various conditions. Additionally, a fixed rack support 57
A sensor 60 (workpiece detector) is provided adjacent to the workpiece, and the workpiece W on the rack 33 supported by the fixed hook 57 (rack supporter) is detected by the sensor 60, so that the distance S between the front and back of the workpiece is changed. However, the distance between the workpiece W and the sensor 60 does not change. Therefore, the sensor 60 can always accurately detect the workpiece W.

(Modified Example) It is also possible to provide a plurality of either or both of the fixed hook and the movable hook.

[Brief explanation of drawings]

Figure 1 is a schematic vertical cross-sectional view, Figure 2 is the − of Figure 1.
FIG. 3 is an enlarged partial view of FIG. 1, and FIG. 4 is a cross-sectional view of FIG. 3. 2... Processing tank, 3... Cart (moving mechanism),
9, 15... Column and slider (elevating mechanism), 1
8... Arm (rack support mechanism), 20... Movable hook (rack support part), 21... Motor (drive mechanism), 33... Rack, 57... Fixed hook (rack support part), 60... ...Sensor (work detector), W...Work.

Claims (1)

[Claims] 1 A large number of processing tanks are arranged in a line to form a processing tank group, a moving mechanism that moves in the longitudinal direction is provided on one side of the processing tank group, an elevating mechanism that protrudes upward is provided on the moving mechanism, and the elevating mechanism A rack support mechanism is made to protrude upward from the processing tank, and the rack support mechanism includes a fixed rack support part, a movable rack support part,
A drive mechanism for the movable rack support is provided, and a workpiece detector is provided adjacent to the fixed rack support.
A plating processing device characterized in that a workpiece on a rack supported by a fixed rack support part is detected by a workpiece detector.