JPS6122901Y2 - - Google Patents

Description

[Detailed description of the invention] This invention applies to the lifting device in the plating equipment, and more specifically, the object to be plated (also simply referred to as the workpiece) is suspended and held via a jig from the transfer cable running along the rail. The present invention relates to a device for lifting and lowering workpieces and jigs in a plating apparatus in which a plating apparatus processes liquids by immersion transferring them between various liquid tanks arranged in the order of processing steps.

In this type of plating equipment, the plating processing conditions for the workpiece may be changed for each operation, but it is necessary to be able to plate the workpiece as specified in any processing operation, and it is necessary to In order to minimize corrosion caused by the processing liquid, it is desirable that all of the jigs can be kept in a retracted state outside of each liquid tank after the processing operation is completed. However, in the past, there was no appropriate technology that could satisfy these requirements.

For this reason, conventionally, when the size of the workpiece that is replaced for each operation is changed or when the plating area of the workpiece is changed completely or partially, the jig should be adjusted to a size that meets these processing conditions. You may have to replace them one by one, or sometimes adjust the length.

(b) Since the jigs are always immersed in the processing solution, at the end of the work, all jigs must be removed from the plating equipment, that is, outside the transfer cable, and stored in a designated location.

These problems were inherent, and as a result, it was very time consuming and troublesome, and the actual workability was very poor.

The idea was made to solve the conventional problems mentioned above, and it is possible to control the immersion depth of the workpiece in the liquid tank (processing liquid) by controlling the movement mechanism and all the workpiece jigs up and down within a predetermined range. This is a lifting device that automatically adjusts the jigs and raises and retracts the jigs. This is intended to prevent corrosion and simplify management and maintenance of the jig.

An embodiment of the present invention will be described below with reference to the drawings. The lifting device of this example moves various workpieces into each liquid tank T.
An example will be shown in which the plating apparatus is implemented in a conventionally common overpass immersion transfer type plating apparatus, in which the plating process is carried out by immersion while overcoming each tank wall during the continuous circular transfer in one direction in a rotating manner.

That is, a frame 3 installed between each support 2 of the fuselage 1 is equipped with a rail 4 and a transfer chain 5, respectively. First, the rail 4 has a substantially U-shaped cross section and is installed along each liquid tank T in a planar horizontally long annular shape. Between each horizontal main rail section 4A including a curved shape, there are approximately trapezoidal cam rail sections 4 including a diagonal section and a horizontal section for transferring the workpiece over the partition wall t of each liquid tank.
B are formed and arranged in series.

On the other hand, the transfer chain 5 is serially inserted into the rail 4 and is connected to the motor 6 installed on the frame 3 as needed to continuously move in one direction. There is. This chain 5
For example, it may be of a trolley conveyor chain type, and workpiece jigs 8, generally called hangers, are removably attached to hanging holders 7 arranged at equal intervals.

Therefore, in such a plating apparatus, in the continuous movement of the transfer chain 5 driven by the motor 6, all the workpieces w supported by the jig 8 are transferred to each liquid by following the main rail portions 4A and cam rail portions 4B of the rail 4. The desired plating treatment can be carried out by transferring the material through the above-mentioned dipping process between the tanks T.

In the above-mentioned plating apparatus, the frame 3 equipped with the rail 4 and the chain 5 is equipped so that it can be moved up and down in a horizontal state using guide holders 9 provided for each of the pillars 2. Each guide holder 9 is held so that the upper and lower rollers 11, 11 of each pair of roller holders 10 fixed on the frame 3 are brought into contact with both sides of the support column 2 and sandwiched therebetween. . Each of the rollers 11 of the holder 9 may be in the shape of a wheel with a flange, for example, and each support 2 serving as a lifting guide member for the frame 3 may be in the form of a rail with an I-shaped cross section as illustrated in FIG. It is desirable to fit the rollers 11 together so that the frame 3 can move up and down accurately and stably without wobbling.

As for the elevating and lowering mechanism for the frame body 3 mentioned above, a type using a chain wheel or chain is employed. That is, from the winding drum (not shown) of the hoist 13 installed on the ceiling frame 12 of the aircraft body 1 to the lower guide wheel 1 installed on the pedestal 14 between the supports 2
The first chain 1 that is hung on 5 in a U-shape and pulled out
6 and one end of each rotary shaft 18, which is connected to a part of the frame 3 and supported by a bearing 17 in each part of the ceiling frame 12. The other ends of the left and right second chains 20, 20, which are hung and pulled out, are connected to a common connector 21, and when the hoist 13 is hoisted, the first chain 16 while winding up the frame 3 by pulling down the other ends of both second chains 20, 20 together with the connecting tool 21,
Conversely, during the unwinding operation, the frame 3 is lowered by allowing the upward movement of the connecting tool 21 while unwinding the first chain 16.

In such a lifting mechanism, the hoist 13
It is sufficient to adopt the required model, and in any case, as with the motor 6 described above, it can be turned on and off (starting and stopping) by remote control using, for example, a button switch in the control section outside the machine frame 1. shall be carried out. and a predetermined position within the mechanism (however, for convenience, the above-mentioned connection tool 21 is taken as an example while being raised or lowered).
2, the hoist 13 is electrically connected to the electric part side, but the first and second
Detection switches 23 and 24 are provided, respectively. The lower first switch 23 is set to be aligned so that the frame 3 is always stopped and held at the uppermost rising end so that the longest workpiece can be lifted and retracted out of the liquid tank T. against the upper second
It is assumed that the switch 24 is aligned so that the frame 3 can be stopped and held at a desired lower end in consideration of matters such as the size of each work and the plating conditions for the work. Which switch 23, 2
4 is also set to be turned on when it comes into contact with, for example, a dog 22 disposed on the connector 21, so that the hoist 13 is automatically stopped.

Regarding the control of the descending end of the frame 3, the lower limit switch 24 is installed at a fixed position so that the frame 3 can be stopped at the lowest position, and the hoist is controlled by the operator's own button operation. 13
A technology that adjusts the lowering end using the incremental movement of the

This technology allows the position of the lower limit switch 24 itself to be adjusted to adjust the lower end.

However, in this example, the latter technical example is illustrated for convenience, and the position adjustment of the switch 24 is performed using a stepped or stepless method connected to a movable member 25 that can be switched and moved based on remote control. It shall be possible to make it in any required form.

Therefore, according to the lifting device of this embodiment configured as described above, by setting and holding the frame 3 at a predetermined lowering end position, the workpiece can be transferred under any processing conditions by the above-mentioned immersion transfer. It can be plated well under normal conditions.

First, in a work mode in which the entire surface of the work is plated, lifting control for changing the work size for each work will be explained with reference to FIG. 4. However, for convenience of explanation, a subscript is added to each workpiece. In other words, in full-surface plating, both long and short workpieces of different sizes must be immersed below the level H of the processing liquid in _each liquid tank _T. , the upper ends of each other with the long workpiece W ₂ of length L ₂ in figure b,
If you try to immerse the workpiece at a predetermined depth position _H1 below the liquid level H, which is fixed for convenience, it is necessary to adjust the immersion depth of the workpiece. It is necessary to adjust the height of the descending end position (clamp position) every time the workpiece is worked.

Under such processing conditions, when plating the long work W ₂ after the short work W ₁ ,
In this example device, the setting position of the second switch 24 in the elevating mechanism is adjusted upward as described above, and the hoist 13 is once retracted to move the entire rail 4 and transfer chain 5 together with the frame 3. It is lowered and held stationary at a predetermined lowering end position that is compatible with the second switch 24.

As a result, all the jigs 8 are adjusted to the height difference H ₂ mentioned above.
The long workpiece is lowered and held at a predetermined position in consideration of the length of time, and the immersion depth of the workpiece is adjusted.
W ₂ can be appropriately plated on the entire surface.

In addition, in such full-surface plating process, long workpieces
When processing short work W ₁ after W ₂ ,
As can be understood from Fig. 4, it is not necessary to adjust the lowering end positions of the frame 3 and all the jigs 8, but if you do not want unnecessary parts of each jig 8 to be immersed, the frame The lowered position of No. 3 may be adjusted.

Next, the elevating and lowering control for changing the plating range of the workpiece in each operation will be explained with reference to FIG. In other words, even if all the workpieces W ₃ are made to have the same length L ₃ for convenience as shown in the figure, there is a difference between full-surface plating done by immersing the workpieces below the liquid level H as shown in Fig. In partial plating, in which only the necessary parts are immersed, it is necessary to adjust the height of the clamp position and adjust the immersion depth of the workpiece as described above for all jigs 8.

Therefore, under such processing conditions, in order to cope with the case where partial plating is to be performed next after complete plating of the entire surface of the workpiece, in this example apparatus, the second clamp position is adjusted to match the above-mentioned height change _H3 of the clamp position. By adjusting the set position of the switch 24 to the lower position, and accordingly raising the frame 3 appropriately as the connecting tool 21 descends and holding it stationary at a predetermined lowering end position, the required partial plating can be performed appropriately. It can be done. Of course, even when changing the process from partial plating to full surface plating, by setting the lower end position of the frame 3 using the second switch 24, the immersion depth of the workpiece can be freely adjusted to perform the required plating work. .

Then, in the plating process under any of the above-mentioned conditions, the hoist 13 of the above-mentioned elevating operation mechanism is hoisted and operated at the necessary time, and the connection is made through the first and second chains 16 and 20. While lowering the tool 21, the entire rail 4 and transfer chain 5 are raised together with the frame 3, and the first
Since the switch 23 can be held stationary at the rising end position corresponding to the switch 23, after completing various plating operations, all the jigs 8 can be moved to an upper position outside the liquid tank T (for example, at the same height position as during the above-mentioned cross-transfer). It can be evacuated and held still.

In addition, in this example device, as for the lifting mechanism, a type using a cylinder or a type using a rack and pinion, etc. other than shown in the drawings may be adopted, and a switch 23 for detecting the lifting end position of the frame 3 , 24 may be arranged on the way of the frame 3 being raised or lowered.

Of course, instead of the switch, a lifting drive motor, a hoist, a cylinder, etc. may be set to be driven only as much as necessary each time. In any case, the elevating mechanism may be provided in a plurality or a single unit depending on the length of the frame 3.

In the lifting device devised in this way, the entire frame, which is equipped with members such as rails and transfer chains for transferring jigs and workpieces between liquid tanks, can be moved up and down via an appropriate lifting mechanism. After the necessary plating work is completed on the workpiece while the frame is held stationary at the predetermined lowering end position, all treatments can be completed by holding the frame at the upper end position. The tool can be evacuated upwards outside the liquid tank and held suspended. This eliminates the need for the jig to be left immersed and prevents corrosion, while also eliminating the need for removal, time, storage space, etc., and allows management and maintenance to be carried out in a suspended state.

In addition, for any processing conditions that require adjusting the immersion depth of the workpiece due to changes in the workpiece size or plating range for each job, there is no need to replace or adjust the jig, and the lower end of the frame body can be adjusted. This can be handled without any problem by adjusting the position, and the work in the specified direction can be carried out efficiently and accurately.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, in which Fig. 1 is a schematic front view of a plating apparatus in which the lifting device of this example is implemented, Fig. 2 is a side sectional view based on the - line in Fig. 1, and Fig. 3 The figure is a plan sectional view based on the line - in Figure 1,
FIGS. 5A and 5B are explanatory diagrams illustrating a comparative example of the elevation control state with respect to changes in the work size, and FIGS. 5A and 5B are explanatory diagrams illustrating a comparison example of the elevation control state with respect to changes in the plating range. 1... fuselage, 3... frame, 4... rail, 5...
...transfer chain, 8... jig, 13... hoist, 16... first chain, 20... second chain, T... liquid tank, W... work.

Claims (1)

[Scope of utility model registration request] When the workpiece passes through each liquid tank, the workpiece is lowered to the top of each liquid tank arranged in the horizontal direction, and the rail installed to guide the transfer tow is suspended above each liquid tank. When passing between the tanks, it is pulled up and meandered in the vertical direction, and is bent so that it runs sequentially along each tank, and
A frame body placed horizontally on the machine body to support the rail, and a workpiece by adjusting the height of the rail,
A plating apparatus characterized in that it is installed so as to be movable in the vertical direction via an appropriate lifting mechanism in order to change the relative position of the processing liquid in each liquid tank to the liquid level in accordance with the size of the workpiece, etc. Lifting device in.