JP2911406B2 - Surface treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is Ru <br/> relates to a surface treatment equipment.

[0002]

2. Description of the Related Art For example, galvanization is widely used for the purpose of preventing corrosion of secondary steel products. However, since zinc plating is corroded by the atmosphere and causes white corrosion, chromate treatment (colored chromate treatment, unichromate treatment) is performed as a post-treatment. In addition, by performing the chromate treatment, the gloss of the treated material is improved. Therefore, after the galvanizing step, a post-processing step including a chromate treatment is prepared as described below.

FIG. 1 is a schematic view showing an example of a step of post-treating a processed product such as a galvanized product. The post-process includes a neutralization process, a water-washing process, a chromate treatment process, a water-washing process, a hot-water washing process, and a drying process. The processed material after galvanizing is placed in a basket 1 at a loading position. It is loaded and transported sequentially to each process along a rail 3 by a transport device (carrier) 2.

[0004] First, the basket 1 is immersed in a dilute nitric acid solution in a neutralization tank 4 to neutralize a plating bath solution adhering to the processed material (neutralization step). After the washing (first washing step), the cage 1 is immersed in the chromic acid solution in the chromate treatment tank 6 in the chromate treatment step to form a chromate film on the surface of the processed material in the cage 1. Next, the treated product on which the chromate coating has been formed is washed with the washing water in the washing tank 7 (second washing step), and then the basket 1 is heated in the hot washing tank 8 in the hot washing step to promote drying. And heat the processed product. Immediately after this, the basket 1 is dried by the drying device 9.
To move the basket 1 to the rotating table 1 inside the drying device 9.
0 and separated from the transporting device 2, and by rotating the basket 1 inside the drying device 9, the water adhering to the processed material is centrifugally dehydrated and dried (drying step). When the drying process is completed, the basket 1 is again attached to the transport device 2 and held, the cage 1 is transported to the original loading position, the cage 1 is removed from the transport device 2, and the operator turns the cage 1 upside down. Then, the processed material inside was taken out.

[0005]

However, in the chromate treatment step, if the processing objects are in close contact (touch) in the cage, the processing liquid does not infiltrate in the meantime, so that the surface of the processing object in close contact is treated. The liquid does not touch, and the color of the processed material changes between a portion that has touched the processing solution and a portion that has not touched, resulting in a defective product. In particular, in the case of a plate-shaped processed product, the processed products are easily adhered to each other due to the surface tension of the processing solution, so that a defective product is easily generated.

For this reason, conventionally, there has been proposed a method in which a basket immersed in a processing liquid is moved up and down in the processing liquid to swing the processed material in the basket up and down.
However, in this method, the adhered processed material only moves up and down while being in close contact, and the effect of peeling the adhered processed material is poor.

[0007] Further, in the conventional surface treatment step, a drying apparatus is required to dry the processed material, so that the equipment cost is high. Furthermore, in order to dry the processed material with the drying device, the basket is removed from the transport device and the drying device is removed.
Placed in location, after drying treatment must be attached to the conveying device the cage body again, it takes time and labor to attach and detach the basket body to the transport device.

Further, after all the processes are completed,
The basket must be removed from the transport device and the basket must be turned over by hand to remove the processed material inside.
Labor saving could not be achieved.

The present invention has been made in view of the above-mentioned drawbacks of the conventional example, and has as its main object to prevent the occurrence of processing defects due to the adherence of processed objects in the surface treatment step. Is to prevent it. It is another object of the present invention to simplify a drying process and to facilitate removal of a processed product after processing.

[0010]

According to a first aspect of the present invention, there is provided a surface treatment apparatus, comprising: a cage having an open upper surface for accommodating a processed object; a holder for holding the cage; and a cage having the cage held therein. Transporting means for transporting the processed material, at least a process of immersing the processed material contained in the basket in the processing liquid to perform a surface treatment, a process of drying the processed material while being stored in the basket, A surface treatment device for performing a process of taking out the basket from the cage, and a rotation driving unit for rotating the holder, and an upright basket held by the holder.
A tilt mechanism for rotating the rotation axis of the holder at an angle of at least 180 degrees for changing the posture between the posture and the upside down posture is provided. Here, the treatment liquid is not limited to a solution containing a chemical, but also includes water and hot water used for cleaning and the like.

[0011] An embodiment of the present invention is directed to a drying processing method.
Rotating the holder by the rotation driving means.
By doing so, the inside of the cage held by the holder
It is characterized in that the processed material is centrifugally dehydrated.

[0012] The embodiment described in claim 3 is claim 1 or claim 2.
3. The surface treatment apparatus according to claim 2, wherein
Insert the cage flange between the horizontal piece and the lower horizontal piece.
The cage by the holder
Slide freely through the pin insertion hole provided in the lower horizontal piece
The pin is inserted through the cage flange.
I have.

[0013]

[Action] The surface treatment apparatus according to claim 1, wherein the holder is
Rotation drive means for rotating and the rotation axis of the holder
Is there a tilt mechanism that can be rotated?
Can rotate the cage around the tilted axis of rotation.
The basket with the processed material is immersed in the processing solution
When the basket is rotated around the axis, the processed objects that are in close contact
Rolls inside the cage due to the effect of gravity,
Separation due to motion or collision between workpieces
You. Therefore, defective products caused by adhesion
Occurrence can be reduced.

Further, the tilt mechanism unit, be rotated at an angle of at least 180 degrees rotation shaft of the holder
In this case, the basket can be turned upside down from the upright posture by greatly changing the angle of the rotation axis by the tilt mechanism , and the processed object can be automatically taken out from the upper opening of the basket. Therefore, it is possible to simplify the work for taking out the processed material and to save labor.

Further, in the surface treatment apparatus according to the second aspect, in the drying step, the holder is rotated by the rotation driving means.
By rotating, the inside of the cage held by the holder
The processed material is centrifugally dehydrated , and the angle of the rotating shaft can be changed by the tilt mechanism.
By holding the basket horizontally and rotating it, or by rotating it at an arbitrary angle, the water adhering to the processed material inside can be dehydrated by centrifugal force and dried. Therefore, a separate drying device can be eliminated. In that case, the step of attaching and detaching the basket from the transport device in the drying step is also omitted, and labor is saved.

Further, according to the third aspect of the present invention , the basket is placed between the upper horizontal piece and the lower horizontal piece of the holder.
Hold the basket in the holder by inserting
And slide it into the pin insertion hole provided in the lower horizontal piece of the holder.
The pins that are freely inserted are inserted through the cage body flanges.
Tilt the rotation axis of the holder with the tilt mechanism.
However, even if the basket is turned upside down,
There is no danger of dropping from the dar. Moreover, the cage body is a holder
When removing the pin from the cage, pull the pin out of the cage body flange.
The cage can be easily attached and detached.

[0017]

FIG. 2 is a partially cutaway front view showing a surface treatment apparatus 11 according to an embodiment of the present invention.
The processing apparatus includes a processing tank 12 for sequentially performing necessary processing on the processed material, and a transport device (carrier) 13 for transporting a basket 14 containing the processed material. FIG. 3 shows a transport device 13 of the surface treatment device 11 for transporting the cage 14 along the treatment tank 12. Transfer device 1
3 is a beam 1 moving mainly along a rail 15
6, a column 17 suspended from the beam 16, and a column 17
And a tilt mechanism 19 for tilting the cage holding portion 18.

Two sets of rolling rollers 2 are provided on the upper surface of the beam 16.
0 is provided rotatably, and each rolling roller 20 is placed on the upper surface of the lower flange 15a of two rails 15 arranged along the upper part of the processing tank 12, whereby the beam 16 is 15 is hung below. A motor chamber 21 is provided on the lower surface of the beam 16, and a motor 22 for movement and a motor 23 for elevating are accommodated in the motor chamber 21. A chain 27 is looped between a driving sprocket 24 attached to an output shaft of the moving motor 22 and a driven sprocket 26 fixed to a connecting shaft 25 connecting the rolling rollers 20. . When the moving motor 22 is driven to rotate the connecting shaft 25, the rolling roller 22 rolls on the lower flange 15a of the rail 15, and the beam 16
Move along.

The hollow cylindrical body 17 having the shape of a square tube is
6 is suspended from the lower surface of the motor chamber 21. FIG. 4 shows the structure of the cage holding section 18 and the tilt mechanism section 19 that move up and down along the column 17. On the outer periphery of the column 17, there is provided a rectangular tube-shaped elevating body 28 that moves up and down using the column 17 as a guide. Are in rolling contact with the four outer peripheral surfaces of the column 17.

The tilt mechanism 19 is provided on one side surface of the elevating body 28. That is, the base plate 30 that extends from one side surface of the elevating body 28 extends, and a tilt shaft 32 is supported by a bearing portion 31 provided on the lower surface of the base plate 30. A tilt motor 36 is fixed to the upper surface of the base plate 30. A driving gear 34 attached to an output shaft of the tilt motor 36 and a driven gear fixed to the rear end of the shaft 32.
33 is connected to a power transmission unit 35 such as a chain or a gear train. Further, the cage body holding portion 18 is supported at the tip of the shaft 32. Therefore, by driving the tilt motor 36 to rotate the shaft 32, the cage holding portion 18 can be tilted. Here, the cage holding portion 18 may be rotated by an angle of 360 °, but it is sufficient that the cage holding portion 18 can be rotated by an angle of 180 ° at least from a straight posture to a vertically inverted posture. In that case, a stopper (not shown) for holding the basket holding portion 18 in a straight posture may be provided on the elevating body 28.

In the basket holder 18, as shown in FIG. 4, an arm 38 extends from a lower part of the front surface of a vertical plate 37 fixed to the tip of the shaft 32, and the arm 3
A holder 39 is rotatably supported at the lower end of the tip 8. More specifically, a shaft 4 protruding from the upper surface of the holder 39 is provided by a metal bearing 40 provided at the tip of the arm 38.
1 is rotatably supported. A driving gear 43 attached to the output shaft of a rotation motor 42 attached to the front surface of the vertical plate 37 and a driven gear 44 fixed to the shaft 41 of the holder 39 are also connected by a power transmission unit 45 such as a chain or a gear train. The holder 39 can be rotated in one direction by driving the rotation motor 42. Note that the rotation speed of the holder 39 is variable.

One end of a chain 46 is connected to the elevating body 28 holding the cage holding part 18, and the other end of the chain 46 is an elevating motor provided in the motor chamber 21 of the beam 16. Chain take-up device 4 connected to 23 via reduction gear 47
And the chain 46 is wound on the chain winder 48 by driving the elevating motor 23 or by unwinding the chain 46 from the chain winder 48 together with the elevating body 28. The cage holder 18 can be moved up and down along the column 17. Further, a second bevel gear 50 is meshed with the first bevel gear 49 integrated with the drum of the chain winder 48, and a chain winding gear 51 provided on the shaft of the second bevel gear 50 has a chain 52.
One end is wound up. The other end of the chain 52 is connected to a balance weight 53 inside the column 17, and balances the weight of the cage holding portion 18 and the like with the balance weight 53 and uses a small power of the elevating motor 23 to reduce the basket weight. The holding section 18 and the like can be moved up and down.

The basket 14 is large enough to hold the number of processed objects to be processed at one time, and as shown in FIG. It has a shape or a braid, or has many holes like a punched metal. The lower part of the upper surface opening 54 of the cage 14 is constricted, and a pin insertion hole 56 is opened at regular intervals in a flange 55 provided thereon.

On the other hand, the holder 39 extends the hanging pieces 58 from both ends of the upper horizontal piece 57 provided with the shaft 41, and
The lower horizontal piece 59 extends inward from the lower end of the lower horizontal piece 59, and one or more pins 60 for inserting into the pin insertion holes 56 are provided on the upper surface of the lower horizontal piece 59 on both sides. It is protruding. Thus, by placing the flange 55 of the cage 14 on the lower horizontal piece 59 of the holder 39, the cage 14 can be held so as to be hung from the holder 39. By inserting the cage body 14 into the pin insertion hole 56, the cage body 14 is locked so as not to fall out of the holder 39.

As will be described later, the cage holding portion 18 is
Since the cage 14 is turned upside down by rotating by 80 °, it is necessary to prevent the cage 14 from falling off the pins 60 at that time. As a measure for this, for example, FIG.
As shown in (a), the pin 60 is inserted into the through hole 61 of the lower horizontal piece 59.
A method is conceivable in which the slide metal is inserted into the base member so as to slide smoothly and the backup metal member 62 prevents the slide member from slipping off. When the holder 39 is oriented in a normal direction so as to suspend the basket 14, the pin 60 is moved as shown in FIG.
Is lowered by its own weight, so that a gap is formed between the tip of the pin 60 and the upper horizontal piece 57 to allow the flange 55 of the cage 14 to pass therethrough. Since the pin 60 projects by its own weight and comes into contact with the upper horizontal piece 57, there is no possibility that the flange 55 of the cage 14 comes off the pin 60 and falls off.

Also, as shown in FIG.
In a case where the pin 60 is projected and urged so that the cage body 14 is attached or detached, the pin 60 may be pressed down and turned to lock the pin 60 in the retracted state. Further, a holding spring or the like for preventing the flange 55 from coming off the pin 60 may be provided.

Next, an example of the operation of the surface treatment apparatus 11 will be described with reference to FIG. 2 and FIGS. Although the configuration of the treatment tank 12 varies depending on the purpose of the surface treatment, in this embodiment, as in the conventional example, a post-treatment step after galvanizing will be described as an example. After the galvanization, the washed processed material is put into the basket 14. The cage body 14 into which the processed material has been put.
Is mounted so as to be hung on the holder 39 of the transport device 13 at the loading position. At this time, since the cage 14 is locked by the pins 60 of the holder 39, it can be easily attached. After being transported to the transport device 13, the processed material in the basket 14 is neutralized in the neutralization tank 4 with a neutralizing solution such as dilute nitric acid in the plating bath solution, and then washed in the washing tank 5 with washing water. In the neutralization tank 4 and the cleaning tank 5, the basket 14 may be simply immersed in the neutralizing liquid or the cleaning liquid, or the rotation motor 42 may be driven to rotate the basket 14. Further, the basket 14 may be immersed in a horizontal posture, or may be immersed in an inclined posture.

Thereafter, the cage 14 and the cage holder 18 are
As shown in FIG. 7, the tilt mechanism 19 tilts the shaft 32 at an angle (greater than 0 ° and smaller than 90 °, for example, about 45 °).
At least the lower part of the cage 14 is immersed in the chromic acid solution in the chromate treatment tank 6. Next, the rotation motor 42 is driven to rotate the basket 14 at a relatively low speed around the rotation axis R that is inclined obliquely. As shown in FIG. 7, the processed material 64 is accumulated in the lower part of the basket 14, but is carried upward by the oblique rotation of the basket 14, and falls downward by its own weight. Stir as you roll. As a result, the adhered processed material 64, particularly the plate-shaped processed material, is peeled off and comes into contact with the chromic acid solution, and a chromate film is uniformly formed on all the processed materials 64 as a whole.

The basket 14 has a large upper opening 54 for the convenience of taking in and out the processing object 64.
Since the rotation axis R is kept oblique without making the rotation axis R horizontal, there is no danger that the processing object 64 inside will spill out of the basket 14.

When the chromate processing is completed, the rotation motor 42 is stopped, and the basket 14 is returned to an arbitrary posture by the tilt mechanism 19. Next, the basket 14 is carried from the chromate treatment tank 6 to the washing tank 7, washed with washing water in the washing tank 7, further washed with hot water in the hot water washing tank 8, and the processed material 64 is heated. Here, the basket 14 may be simply immersed in washing water or hot water, or may be rotated. Further, the basket 14 may be immersed in a horizontal position, or may be immersed in an inclined posture.

As shown in FIG. 8, the basket 14 taken out of the hot water washing tank 8 is rotated at a relatively high speed above the processing tank 12 by the basket holder 18 driven by the rotation motor 42. Return to the original direction. At this time, the processed material 64 in the basket 14 is dried by self-heating (heat heated in the hot water washing tank), and at the same time, the water is centrifugally dehydrated by the rotation of the basket 14 to be immediately dried and the original loading. Return to position. Therefore, the processing object 64 can be dried without using a drying device as in the conventional example, so that the processing can be performed while holding the basket 14 to the end, thereby reducing equipment space and equipment cost. be able to. In addition, the labor for removing the cage 14 from the holder 39 and putting it in the dehydrating apparatus is omitted, and labor is saved.

When the basket body 14 returns to its original position after the processing is completed in this way, as shown in FIG. 9, the tilt mechanism section 19 rotates the basket body holding section 180 by 180 ° to turn the basket body 14 upside down. . The processed material 64 that has fallen from the inverted basket 14 is collected in a collection container 65. Therefore, labor for removing the processing object 64 from the basket body 14 becomes unnecessary, and labor saving is achieved. Further, as a result that the basket body 14 can be inverted by the basket body holding unit 18 and the processing object 64 can be taken out,
Without removing the cage 14 from the holder 39, the cage 1
The processing object 64 can be loaded and unloaded while the holder 4 is attached to the holder 39.

[0033]

According to the present invention, it is possible to effectively prevent processing defects due to close contact of the processing object, and to improve processing efficiency in the surface processing step. Since the processed material can be centrifugally dehydrated by rotating the basket, a separate drying device can be eliminated, and equipment costs can be reduced.

Further, since the processing object can be automatically taken out from the upper opening of the basket body by inverting the basket body, the work to take out the processing object can be easily performed.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a post-treatment process after a conventional plating process.

FIG. 2 is a partially cutaway front view showing the surface treatment apparatus according to one embodiment of the present invention.

FIG. 3 is a partially cutaway side view showing a transfer device in the surface treatment device of the above.

FIG. 4 is a perspective view showing a mechanism for elevating and lowering and tilting a cage holding portion of the transport device, and a shape of the cage.

FIG. 5A is a partially enlarged sectional view showing a structure of a pin provided on a holder. (B) is sectional drawing which shows the state of the pin when a holder is turned upside down.

FIG. 6 is a partially enlarged sectional view showing another structure of a pin provided on a holder.

FIG. 7 is a view showing a chromate treatment step by the surface treatment device of the above.

FIG. 8 is a view showing a drying step by the surface treatment device of the above.

FIG. 9 is a view showing a processed material discharging step by the surface treatment device of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Processing tank 13 Transport apparatus 14 Basket 18 Basket holding part 19 Tilt mechanism 38 Arm 39 Holder 42 Rotation motor 64 Processed material

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁶ , DB name) C23C 22/73 B65G 49/04 C23C 2/06 C23C 2/26 C23C 28/00 C23G 3/00

Claims (3)

(57) [Claims] 1. A cage body for opening a top surface for storing a processed material,
A holder for holding the basket, and a transport unit for transporting the basket while being held by the holder, at least a process of immersing a processed material contained in the basket in a processing liquid to perform a surface treatment; A surface processing apparatus for performing a process of drying a processed product while being stored in a basket, and a process of removing the processed product from the basket, and a rotation driving unit for rotating the holder; and the holder. Upright and upside down
And a tilt mechanism capable of rotating the rotation axis of the holder at an angle of at least 180 degrees for changing the posture . 2. The drying treatment step, wherein the rotation driving means rotates the holder to centrifugally dehydrate a processed material in the cage held by the holder. Surface treatment equipment. 3. The cage is held by the holder by inserting a flange of the basket between the upper horizontal piece and the lower horizontal piece of the holder, and the cage is slid into a pin insertion hole provided in the lower horizontal piece of the holder. The surface treatment device according to claim 1, wherein a pin freely inserted is inserted into a flange of the basket body.