JPS60215798A - Treating apparatus for plating - Google Patents

Abstract

PURPOSE:To provide a titled device which prevents contamination of the treating liquid in treating tanks and reduces installation cost by providing a rack supporting mechanism which projects above the treating tanks to a lifting mechanism which is provided on a carriage moving in the longitudinal direction of a series of the treating tanks and projects upward. CONSTITUTION:Many treating tanks 2 for plating are disposed in one row and a carriage 3 moving on rails 5 is provided in the longitudinal direction thereof. A lifting mechanism consisting of a column 9 and slider 15 projecting upward is provided thereto. A rack supporting mechanism attached with an arm 18 which is mounted with a movable hook 20 at the top end and is made movable longitudinally by motor 21 in a way as to project above the tanks 2 is provided to said slider 15. The hook 20 is engaged with the hook 26 of a rack 33 and is moved upward by the lifting mechanism. The carriage 3 is then moved to transfer easily a work W supported with the rack 33 to the other treating tank. The drop of a contaminating material from the movable part into the treating tank is thus obviated and the ceiling is made low, by which the installation cost of the apparatus is reduced.

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 kind of plating equipment, a self-propelled transport mechanism is provided above the plating tanks arranged in rows, and the workpieces (for example, printed circuit board materials) are suspended by the hangers of the transport mechanism, and transferred to various processing tanks. A structure in which the water is dipped in sequence is widely used. 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 one side of the processing tank has already been proposed, but with the conventional structure, when two workpiece holding racks are attached to one device, There are problems in that it is difficult to freely adjust the distance between the two racks and to detect workpieces in the racks.

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

(Structure of the Invention) ゛ In the present invention, a large number of processing tanks are arranged in a line to form a processing tank group, a moving mechanism is provided on one side of the processing tank group to move in the longitudinal direction of the processing tank group, and a moving mechanism that protrudes upward is provided on one side of the processing tank group. A rack support mechanism is provided above the processing tank from the lift mechanism, and a fixed rack support part is provided on the rack support mechanism, -
A movable rack support part and a drive mechanism for the movable rack support part are provided, and a workpiece detector is provided adjacent to the fixed rack support part to detect the workpiece in the rack supported by the fixed rack support part. It is characterized in that it is detected by a detector.

(Example) In FIG. 1, which is a schematic vertical cross-sectional view, a large number of processing tanks 2 (only one shown) are installed in a - row on a base 1, and although not shown, a large number of processing tanks 2 A long treatment tank group is formed in a direction perpendicular to the paper plane of FIG. There is a trolley 3 on the base 1 on the left side of the treatment tank 2 in Figure 1.
A frame 4 is provided for use. A rail 5 is attached to the upper end of the frame 4. The trolley 3 is located at approximately the same height as the upper half of the processing tank 2, and is equipped with tires 6 and rollers 7 at its lower end. The tire 6 runs on the upper surface of the rail 5, and the roller 7
are designed to hold 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 the vertical column 9 is attached to the upper end of the truck 3.

A vertical support 10 extending along a column 9 is attached to the base 1, and a rail 12 is attached via a bracket 11 to the upper end of the support 1o.

The rail 12 extends parallel to the rail 5, and guide rollers 13 running on both sides of the rail 12 are provided at the upper end of the column 9.

A slider 15 is attached to the column 9 so that it can be raised and lowered by rollers 16 and 17. 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 (towards the left 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 to a support stay 19.
are connected by. A pair of left and right movable hooks 20 are attached to the tip of the arm 18, and a motor 21 for moving the hooks 20 is attached to the upper surface of the base end of the arm 18.
is the installation.

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 lowered position N shown by the solid line, a pair of hooks 26 of the carrier bar 25 are located outside both hooks 20. The carrier bar 25 is a member that extends in the width direction of the processing tank 2, and the lower ends of both hooks 26 are fixed to a central portion of the carrier bar 25 with a gap between them. The upper end of the hook 26 is provided with an engaging portion 27 that protrudes toward the hook 20 side, and the engaging portion 27 can be secured and held from below by a ■-shaped recess (U not shown) on the surface of the engaging portion 22f. ing.

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

carrier bar 2 between each hook 26 and saddle 28;
5, the upper end of the frame-like rack 33 is fixed. The rack 33 holds the workpieces W in, for example, two stages, upper and lower, surrounding the workpieces W, and the workpieces W are in a posture in which the surface thereof is vertical and parallel to the width direction of the processing tank 2.

In FIG. 2, which is a schematic enlarged view of a portion taken along arrows 1--2 in FIG. 1, a motor 35 and a speed reducer 36 are provided at the bottom of the truck 3 for driving the tires 6 on the right side in FIG. At the top of the truck 3 is a motor 3 for driving a pair of chains 37.
8 and deceleration 8139 are provided. The output shaft 40 of the reducer 11139 is parallel to the workpiece conveyance direction F (the longitudinal direction of the processing tank group), and the sprockets 4 attached to both ends of the output shaft 40
The lower end of a chain 37 is wrapped around 1. 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 both columns 9
A support shaft 44 of a sprocket 42 is supported by a bracket 43 that connects the upper ends of the sprocket 42 via a bearing. Said slider 1
54 and between both columns 9.9, and both ends of each chain 37 are connected to the slider 15 via chain hooks 45.
is connected to. Also, the rollers 16 and 17 of the slider 15
are engaged with the guide grooves of each column 9 at two locations, upper and lower.

As shown in FIG. 3, which is an enlarged partial view of FIG. connected. An intermediate portion of the member 46 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. Each gear 50
The lower end is engaged with the rack 51. Both racks 51 extend parallel to the member 46 and are each fixed to the movable hook 20 via a bracket 52. Also each hook 2
0 are each supported by the arms 18 via shafts 55 parallel to the members 46 as follows.

As shown in FIG. 4, which is a cross-sectional view of IV-TV in FIG. 3, supports 53 projecting downward are fixed to the lower ends of both arms 18. A book shaft 55 is mounted 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. The fixing hook 57 is located adjacent to one of the supports 53.

In the illustrated state, the movable hook 20 is located adjacent to the other support 53, and the rack 51 is located adjacent to the other support 53.
It extends from near 0 to below the gear 50.

As shown in FIG. 3, a pair of fixing hooks 57 are also provided.

The hook 57 is constructed in the same manner as the hook 20 except that it is fixed to the shaft 55, and its lower end suspends a carrier bar 25 separate from the hook 20.

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 fixed hook 57 and the arm 18 and on the slider 1, for example, when viewed in the conveying direction F.
5, and as shown in Figure 1, processing f! ? It is located above 2. The sensor 60 is attached to the tip of a bending arm 61 fixed to the surface of the truck 31. The arm 1 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 deceleration 41136, the truck 3 travels on the rail 5, and the column 9 and slider 15 are moved along with the truck 3 in the transport direction F or in the opposite direction. move in the direction. When the motor 38 operates, the chain 37 is driven via the reducer 39 and the sprocket 41, and the chain 37 moves the slider 15, the arm 18 shown in FIG. 1, etc. up and down. Actually, by combining these operations, the workpiece W is transported as follows.

The rack 33 on which the workpieces W have been attached is suspended by the hook 20 and moved to the processing tank 2 at the elevated position M shown by the two-dot chain line.
It is conveyed by the movement of the trolley 3 to the upper part. 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 carriage 3 moves forward a little, the slider 15 rises, and the workpiece W may be moved to another location to carry out the work of transporting another carrier bar. After a certain period of time has elapsed, the hook 2o rises from the lowered position N, lifts up the carrier bar 25, and then moves to the top of the next processing tank.
After that, the same immersion machine is repeated, and the workpiece W undergoes the next process! be done.

. In the above operation, when the front and rear width of the processing tank 2 (Fig. 4) is small, the motor 21 shown in Fig. 3 drives the gear 50 via the shaft 48 shown in Fig. 4, and the gear 50 drives the rack 51. Then, the hook 20 moves on the shaft 55 toward the fixed hook 57. This allows hook 20
．． 57 interval, that is, the front and back interval S of both workpieces W1W
is adjusted according to the width of the front and back 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 ascending position ff1M to the descending position ff1 in Fig. 1.
When descending to N, the sensor 60 detects the presence or absence of the workpiece W in the rack 33 at the ascending position M, and the workpiece W
When it is detected that the workpiece W is present, a current is applied to the processing tank 2 after the entire workpiece W is immersed in the processing tank 2. In this detection operation, the workpiece W suspended from the fixed hook 57 is
0 is detected, the distance between the workpiece W and the sensor 60 does not change even if the distance S before and after the workpiece is changed as described above. Therefore, the sensor 60 can always accurately detect the workpiece W.

During the above operation, foreign matter such as dust falls from movable parts such as the trolley 3 and slider 15 in Fig. 1, but since these movable parts are located on the side of the processing tank 2, foreign matter is is treatment tank 2
It will not fall inside. Therefore, the processing liquid (filling 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 trolley 3 (
The arm 18 (rack support mechanism) is moved from the slider 15 to the processing tank 2.
Since it is made to protrude upward, foreign matter such as dirt and dust that have fallen from movable parts such as the carriage 3 and the slider 15 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, since the movable hook 2Of is provided in addition to the fixed hook 57, the distance S between the front and back of the workpiece can be freely adjusted in response to various conditions. Furthermore, the fixed rack support part 5
A sensor 60 (workpiece detector) is provided adjacent to 7,
Since the workpiece W on the rack 33 supported by the fixed hook 57 (rack support part) is detected by the sensor 60, even if the front-to-back distance S of the workpiece is changed, the surface distance between the workpiece W and the sensor 60 changes. do not. Therefore sensor 6
0, the workpiece W can always be detected accurately.

(Modification) It is also possible to provide a plurality of fixed hooks and/or movable hooks or both.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical cross-sectional view, FIG. 2 is a schematic enlarged view of a portion of FIG.
FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. 2...Processing tank, 3°...Dolly (moving mechanism), 9.15...Column and slider (lifting mechanism), 18...Arm (rack support mechanism), 20...Movable hook (rack support part), 21... motor (drive mechanism), 33... rack, 57... fixed hook (rack support part), 60...
・Sensor (workpiece detector), w... Workpiece patent applicant Uemura Kogyo Co., Ltd. Figure 2

Claims (1)

[Claims] A large number of processing tanks are arranged in a line to form a processing tank group, a moving mechanism is provided on one side of the processing tank group to move in the longitudinal direction, and the moving mechanism is provided with an elevating mechanism that protrudes upward. A rack support mechanism is made to protrude above the processing tank, and a fixed rack support part, a movable rack support part, and a drive mechanism for the movable rack support part are installed in the rack support mechanism.
A workpiece detector is installed 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.