JP2006192336A - Apparatus and method for treatment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treating apparatus capable of treating a to-be-treated material, regardless of the shape of the material, because of causing large variation of the posture of the material compared with basket and barrel type treating apparatuses and preventing detachment of the film due to e.g. scrubbing. <P>SOLUTION: A treating solution storage tank 2 stores a treating solution 8 for treatment of the surface of a material 9 to be treated. An inner container 3 has a containing space for containing the material 9. An outer container 4 houses the inner container 3 and is immersed in the treating solution 8 stored in the storage tank 2. Since a plurality of holes which the material 9 cannot pass through are formed in the inner and outer containers 3 and 4, the containing space of the inner container 3 is filled with the treating solution 8. A lid 5 covers the containing space of the inner container 3. The inner and outer containers 3 and 4 are integrated with the lid 5. A rotating means 6 rotates the outer container 4 integrated with the inner container 3 in the treating solution 8 so that the rotation axis becomes perpendicular to the vertical direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a processing apparatus and a processing method for processing a surface of an object to be processed by bringing a processing liquid into contact with the object to be processed.

  The plating process is a process in which the surface of a product (object to be processed) such as metal and plastic is coated with another metal or the like. By performing the plating treatment, properties such as corrosion resistance and decorativeness that were not present before the plating treatment can be imparted to the workpiece.

  Plating processes actually performed are divided into process steps, which are a polishing process, a pretreatment process, a plating process, a post-treatment process, a drying process, and the like. These steps differ depending on the material, shape, size, finished state, type of plating, etc. of the workpiece to be plated, but are as follows.

  In the polishing step, the surface of the object to be processed is polished smoothly. In the pretreatment step, impurities on the surface of the workpiece are removed. In the plating step, the surface of the object to be processed is coated with a metal. In the post-processing step, the object to be processed coated with metal is further subjected to processing such as surface processing and imparting corrosion resistance. In the drying step, the object to be processed is dried. Through the above steps, the object to be processed can be plated.

  Various post-treatment steps are known, but chromate treatment is known as a galvanization post-treatment step. In the chromate treatment, when the object to be treated with zinc plating is immersed in a treatment solution containing chromate (chromic acid), the zinc surface is partially dissolved by the acid, so that chromium is reduced and at the same time near the surface. The pH of the solution increases, and complex compounds such as salts, oxides and hydrates mainly composed of chromium adhere to the surface to form a chromate film. Therefore, the chromate treatment can be efficiently performed by efficiently bringing the treatment liquid containing chromate into contact with the galvanized workpiece. As a method for treating the surface of an object to be treated by bringing the treatment liquid into contact with the object to be treated, the following methods are known.

  Conventionally, as post-treatment of plating treatment using a barrel plating apparatus (for example, chromate treatment performed after galvanizing using a barrel plating apparatus), a post-treatment method using a barrel plating apparatus as it is and plating treatment After processing, replace the object to be processed from the barrel plating device to another container such as a drying basket or basket, and perform post-processing by rotating the container back and forth so that the rotation axis is parallel to the vertical direction. There is a way to do it. Therefore, as a processing apparatus that performs post-processing, there are a barrel-type processing apparatus (barrel plating apparatus) and a basket (cage) -type processing apparatus that performs horizontal screw-type rotation on a container that accommodates an object to be processed. The barrel type processing apparatus and the basket type processing apparatus each have advantages and disadvantages.

  The barrel type processing apparatus has the following advantages. A barrel type processing apparatus rotates a container (barrel) containing an object to be processed so that a rotation axis is perpendicular to a vertical direction. By doing so, in the barrel type processing apparatus, the object to be processed moves well in the barrel and the posture of the object to be processed can be changed well as compared with the basket type processing apparatus. That is, the barrel type processing apparatus is less likely to be in contact with the surfaces with the objects to be processed, as compared with the basket type processing apparatus. If the surfaces to be processed remain in contact with each other, there will be a part where the object to be processed and the processing liquid do not come into contact with each other during the processing, Will not be processed. That is, a part (touch) that is not sufficiently processed due to the overlap between the objects to be processed occurs in the objects to be processed. If there is a touch, the corrosion resistance is naturally low because the part has a thin film such as a rust preventive film. In that respect, as described above, since the barrel-type processing apparatus is less likely to remain in contact with each other, the occurrence of touch is small, and the object to be processed has sufficient corrosion resistance. Can be granted.

  In addition, the barrel type processing apparatus generally has a large capacity of the container, and furthermore, since the posture change of the object to be processed in the apparatus is large, it is sufficient even if a large amount of object to be processed is put into a container with a large capacity. Can be processed. That is, the amount that can be processed at one time can be increased as compared with the case of using a basket type processing apparatus.

  Furthermore, the barrel-type processing apparatus can perform the pretreatment, the plating treatment, and the posttreatment performed before the plating treatment with the barrel. In other words, all the processing can be performed in the same container without replacing the object to be processed with another container. Therefore, the production line has a simple structure and the production cost is low.

  However, the barrel type processing apparatus has the following disadvantages. In order to perform the drying process which dries the to-be-processed object performed after a post-process, it is necessary to move a barrel type processing apparatus to a drying basket. At that time, the shooter is slid while the surface of the object to be treated is wet and transferred to the dry basket, so that the object to be treated and the shooter are rubbed, and the film formed by the plating process and post-treatment is dropped. Or the workpiece is struck by a shooter and scratches. In such a portion, since the coating such as the rust preventive coating becomes thin and the base plating is exposed, the corrosion resistance naturally becomes low.

  In post-processing, the speed of rotating the barrel is adjusted with an inverter or the like, and the barrel is rotated at a high speed. However, there is a limit to the change in the posture of the object to be stirred in the barrel, and there are many flat parts such as washers. It can be processed even with processed objects, but for processed objects with more flat parts than washers and thin plate-shaped processed objects (especially processed objects with a thickness of 1.0 mm or less), there is a defective touched object. It becomes a processed product.

  On the other hand, the basket type processing apparatus has the following merits. Unlike a barrel-type processing apparatus, a basket-type processing apparatus can perform a drying process with a container (basket) used during post-processing, so that an object to be processed such as a barrel-type processing apparatus can be used as a shooter. There is no loss of film due to rubbing.

  However, the basket type processing apparatus has the following disadvantages. Since the basket-type processing apparatus simply moves the basket up and down in the vertical direction while rotating the horizontal screw or rotating the horizontal screw by the carrier arm, the posture of the object to be processed in the basket does not change much. Therefore, the basket-type processing apparatus can be used for post-processing an object to be processed with a large number of flat surfaces, such as nuts, screws, and pressed products. In the case of post-processing, the number of touches can be increased so that it cannot be used.

  Further, since the posture of the object to be processed is difficult to change, it is necessary to reduce the amount that can be processed at one time, resulting in low productivity. Further, since the basket type processing apparatus is rotated by connecting the carrier arm to the basket from above, it cannot be covered. Accordingly, if the rotational speed is increased in order to increase the change in the posture of the object to be processed, the object to be processed will jump out.

  A typical prior art is described in US Pat. The post-plating processing apparatus of Patent Document 1 is a basket-type processing apparatus, and has a suspension member that reciprocates around a vertical axis and moves up and down along the rotational axis. A plurality of places on the upper edge of the basket are suspended by the suspension member, and the basket and the suspension member are engaged and held. Further, a gap is provided between the basket and the suspension member for applying an impact force to the entire basket when the basket is rotated and reversed.

JP 61-153297 A

  The conventional post-processing apparatus has advantages and disadvantages as described above. In addition, it is preferable to use a barrel-type processing apparatus for an object to be processed such as a washer having a large number of flat portions, and a basket for an object to be processed having a large number of uneven portions such as nuts, screws, and pressed products. It is preferable to use a processing device of the formula. Therefore, it is necessary to select a processing apparatus to be used for each object to be processed.

  According to the post-plating processing apparatus disclosed in Patent Document 1, when the rotation of the basket is reversed, an impact force is applied to the entire basket, so that the change in the posture of the workpiece can be increased. Compared with the processing apparatus, the posture change of the object to be processed is small.

  The object of the present invention is that the change in the posture of the object to be processed is larger than that of the barrel type processing apparatus as well as the basket type processing apparatus, and can be processed regardless of the shape of the object to be processed. It is an object of the present invention to provide a processing apparatus and a processing method that can prevent the film from falling off due to rubbing.

The present invention provides a processing liquid storage tank for storing a processing liquid for processing the surface of an object to be processed;
An inner container having a storage space for storing the object to be processed, and the storage space communicating with the outside through a plurality of holes through which the object to be processed cannot pass;
An outer container containing an inner container and having a plurality of holes;
A lid that covers the accommodation space of the inner container and integrates the inner container and the outer container;
Rotating means for rotating the outer container so that the rotation axis is perpendicular to the vertical direction,
The processing apparatus is characterized in that an outer container integrated with an inner container by a lid is rotated in the processing liquid.

  Further, in the invention, the rotating means rotates the outer container so that an object to be processed in the inner container exists in a lower limit region from the liquid level of the processing liquid in the processing liquid storage tank.

  Further, the invention is characterized in that the rotating means has a rotating shaft in a lower limit region from the liquid level of the processing liquid in the processing liquid storage tank.

In the present invention, the rotating means includes a rotating shaft,
The rotating shaft is installed outside the outer container.

In the present invention, the rotating shaft is supported by the treatment liquid storage tank.
Moreover, the present invention is characterized in that the inner container is provided with a mesh inside.

According to the present invention, the inner container has a circular cross section perpendicular to the vertical direction.
In the invention, the treatment liquid is a chromate treatment liquid.

  Further, the present invention is characterized by having a transporting means for transporting the outer container while the inner container and the outer container containing the objects to be processed are integrated.

  Moreover, this invention is a processing method characterized by processing the surface of a to-be-processed object using said processing apparatus.

  According to this invention, the process liquid storage tank has stored the process liquid for processing the surface of a to-be-processed object. The inner container has a storage space for storing a workpiece. The outer container accommodates the inner container and is immersed in the processing liquid stored in the processing liquid storage tank. The lid covers the accommodation space of the inner container. Furthermore, the inner container and the outer container are integrated by a lid. The rotating means rotates the outer container integrated with the inner container in the processing liquid so that the rotation axis is perpendicular to the vertical direction. Since the inner container and the outer container are formed with a plurality of holes through which the object to be processed cannot pass, the storage space of the inner container is filled with the processing liquid.

  By doing so, the inner container containing the object to be processed can be rotated in the processing liquid so that the rotation axis is perpendicular to the vertical direction. Can be made. Therefore, regardless of the shape of the object to be processed, processing can be performed without generating a defective product such as a touch.

  In addition, since the posture change of the object to be processed is large, the reaction rate of the processing liquid to the object to be processed is increased. Therefore, the working time can be reduced and the treatment liquid concentration can be lowered, so that the cost can be reduced.

  Furthermore, since the posture of the object to be processed is changed in the processing liquid, the objects to be processed do not collide with each other and the film is not dropped off.

  Moreover, after processing a to-be-processed object, in order to dry a to-be-processed object, it is not necessary to replace a to-be-processed object with another container. That is, only the inner container can be transported from the processing apparatus to a drying device such as a centrifugal dehydrator and dried while the object to be processed is accommodated in the inner container. Therefore, the object to be processed is not rubbed by replacing the container, and the film can be prevented from falling off.

  Further, according to the present invention, the outer container is rotated by the rotating means so that the object to be processed in the inner container exists in a lower limit region from the liquid level of the processing liquid in the processing liquid storage tank. By doing so, regardless of the shape of the object to be processed, processing can be performed without further generating defective products such as touch.

  Moreover, according to this invention, it rotates so that a rotating shaft may exist in the area | region of the minimum from the liquid level of the process liquid of a process liquid storage tank. By doing so, the outer container can be rotated by the rotating means so that the object to be processed in the inner container exists in the lower limit region from the liquid level of the processing liquid in the processing liquid storage tank, and the shape of the object to be processed Regardless of the case, it is possible to process without further generating defective products such as touch.

  Moreover, according to this invention, a rotating shaft is installed in the outer side of an outer container. By doing so, since there is no rotation shaft in the inner container, the rotation shaft does not hinder the posture change of the object to be processed during rotation. Therefore, the change in the posture of the object to be processed can be further increased, and processing can be performed without further generating defective products such as touch.

  Moreover, according to this invention, the rotating shaft installed in the outer side of the outer container is supported by the process liquid storage tank. By doing so, it is possible to easily rotate the inner container containing the object to be processed in the processing liquid so that the rotation axis is perpendicular to the vertical direction.

  Moreover, according to this invention, a mesh is arrange | positioned inside the inner container. By doing so, it is possible to further prevent the object to be treated from being scratched or the film from falling off during the treatment. Furthermore, after processing, when it is made to dry with the to-be-processed object put in the inner container, it becomes easier to dry.

  Further, according to the present invention, since the inner container has a circular cross section perpendicular to the vertical direction, the inner container can be used as it is in a drying apparatus used after post-treatment.

  Further, according to the present invention, since the treatment liquid is a chromate treatment liquid, the chromate treatment after the plating treatment is performed without causing defective products such as a touch on the treatment object regardless of the shape of the treatment object. It can be performed.

  Moreover, according to this invention, it has a conveyance means for conveying an outer container, with the inner container and the outer container which accommodated the to-be-processed object integrated. By doing so, without moving the inner container containing the object to be processed or replacing the processing liquid in the processing liquid storage tank, the outer container in which the inner container containing the object to be processed is integrated is set for each. The object to be processed can be processed with a plurality of processing liquids simply by transporting the processing liquid to the processing liquid storage tank. Furthermore, the opening of the inner container does not need to be upward except when the object to be processed is accommodated in the inner container.

  Moreover, according to this invention, the surface of a to-be-processed object is processed using the said processing apparatus. By doing so, since the posture of the object to be processed can be greatly changed in the processing liquid, the object to be processed can be processed without causing a defective product such as a touch regardless of the shape of the object to be processed. it can.

  In addition, since the posture change of the object to be processed is large, the reaction rate of the processing liquid to the object to be processed is increased. Therefore, the working time can be reduced and the treatment liquid concentration can be lowered, so that the cost can be reduced.

  Furthermore, since the posture of the object to be processed is changed in the processing liquid, the objects to be processed do not collide with each other and the film is not dropped off.

  Moreover, since it can dry after processing, putting a to-be-processed object into an inner container, a to-be-processed object is not rubbed by replacement | exchange of a container, etc., and the fall of a film | membrane can be prevented.

  Hereinafter, the present invention will be described in detail by embodiments. The present invention is not limited to the present embodiment unless the gist thereof is changed.

  FIG. 1 is a schematic sectional view showing a processing apparatus 1 according to an embodiment of the present invention. The processing apparatus 1 is a processing apparatus that processes the surface of the object to be processed by bringing the processing liquid into contact with the entire surface of the object to be processed by changing the posture of the object to be processed. For example, it can be used for chromate treatment of zinc plating, which is a post-treatment step of plating treatment.

  The processing apparatus 1 includes a processing liquid storage tank 2, an inner car 3, an outer car 4, a lid 5, a rotating means 6, and the like. The processing liquid storage tank 2 is opened upward, has a substantially rectangular parallelepiped storage space 7, and stores a processing liquid 8, for example, a chromate processing liquid, for processing the surface of the workpiece 9 in the storage space 7. To do.

  The inner basket 3 has an opening for introducing the workpiece 9 and can accommodate the workpiece 9. The outer car 4 can accommodate the inner car 3 and is connected to the rotating means 6. The lid 5 is supported by the outer car 4 and closes the opening of the inner car 3. By doing so, a closed accommodation space 10 for accommodating the workpiece 9 is formed in the inner car 3. Further, since the opening of the inner car 3 is closed by the lid 5 supported by the outer car 4, the inner car 3 is covered by the lid 5, and the inner car 3 and the outer car 4 are integrated. And rotated.

  The rotating means 6 includes a motor and a gear 11 (not shown). The gear 11 is installed inside the processing liquid storage tank 2. The gear 11 is rotated by a motor to rotate the gear installed in the outer cage 4. By doing so, the inner car 3 rotates in the processing liquid 8 together with the outer car 4, and the processing liquid 8 can be brought into contact with the entire surface of the workpiece 9 in the inner car 3. The inner car 3 is an inner container, and the outer car 4 is an outer container.

  The configuration of the outer car 4 will be described. FIG. 2 is a front view of the outer car 4. FIG. 3 is a top view of the outer cage 4. FIG. 4 is a side view of the outer cage 4. 4A is a right side view of the outer cage 4, and FIG. 4B is a left side view. FIG. 5 is a bottom view of the outer cage 4. FIG. 6 is a cross-sectional view taken along section line S1-S1 in FIG. FIG. 7 is a cross-sectional view taken along section line S2-S2 in FIG.

  The outer car 4 includes a peripheral body 12, a bottom plate 13, an inner car fixing plate 14, a lid support 15 and a rotating shaft fixing plate 16.

  As shown in FIGS. 2 and 3, the peripheral body portion 12 is composed of eight rectangular and flat plate members having a plurality of through holes 17, and the plate members are connected to each other to have a cross-sectional shape perpendicular to the vertical direction. It has an octagonal cylindrical shape.

  As shown in FIG. 2, the bottom plate 13 is connected to the lower portion of the peripheral body portion 12. As shown in FIG. 5, the bottom plate 13 is a flat plate having the same shape as an octagon that is a cross section perpendicular to the vertical direction of the peripheral body portion 12, and has a plurality of through holes 17. Further, the bottom plate 13 has corners so that the outer cage 4 can be easily rotated.

  As shown in FIGS. 3, 6 and 7, the inner car fixing plate 14 includes an inner car fixing plate 14a installed in the horizontal direction and an inner car fixing plate 14b installed in the vertical direction. The two inner car fixing plates 14a installed in the horizontal direction are installed vertically to the plate material constituting the peripheral body portion 12, and the inner car fixing plates 14b installed in the vertical direction are arranged from the plate material constituting the peripheral body portion 12 to the outer car 4. It is installed parallel to the direction toward the center of the. For example, as shown in FIG. 3, eight pieces are installed vertically on the plate material constituting the peripheral body portion 12.

  The inner car fixing plate 14a installed in the horizontal direction has a hole through which the inner car 3 can pass in the center. In particular, referring to FIG. 6, the lower part of the inner car fixing plate 14 b installed in the vertical direction enters the inside of the hole through which the inner car 3 can pass in order to support the inner car 3. However, except for the lower part of the inner car fixing plate 14b installed in the vertical direction, the inner car 3 does not protrude into the hole through which it can pass.

  Other than the lower part of the inner car fixing plate 14b installed in the vertical direction, the inner car fixing plate 14b installed in the vertical direction is installed so as not to protrude inside the hole through which the inner car 3 can pass. Therefore, the inner car 3 can be smoothly inserted into the outer car 4. Furthermore, since the lower part is provided with an inner car fixing plate 14b installed in the vertical direction so as to enter the inside of the hole through which the inner car 3 can pass, the outer car 4 supports the inner car 3. Can be accommodated stably. Further, as shown in FIG. 3, the inner car fixing plate 14 has a plurality of through holes 19.

  As shown in FIGS. 2 to 4, 6, and 7, the lid support 15 is installed on the inner car fixing plate 14 a that is installed in the horizontal direction inside the two opposing plate members that constitute the circumferential body 12. . The lid support 15 can support the lid 5.

  As shown in FIGS. 2 to 7, the rotary shaft fixing plate 16 is installed outside the two plates on which the lid support 15 is installed, and has a rotary shaft for rotating the outer cage 4. Is installed in the center of the plate material. The outer cage 4 is made of a resin, for example, polyvinyl chloride (PVC).

  The rotating means includes a rotating shaft 20, and the rotating shaft 20 is installed outside the outer cage 4. For example, as shown in FIGS. 2 to 7, the rotating shaft 20 is installed on the rotating shaft fixing plate 16. Further, a gear 21 is installed on the rotary shaft fixing plate 16 installed on the left side surface of the peripheral body 12. By rotating the gear 21 by the rotation means 6, the outer cage 4 rotates around the rotation axis 22 passing through the center of the rotation shaft 20. By doing so, since the rotating shaft 20 does not exist in the inner cage 3, the rotating shaft 20 does not hinder the posture change of the object to be processed during the rotation. Therefore, the change in the posture of the object to be processed can be further increased, and processing can be performed without further generating defective products such as touch. Further, the rotation axis 22 passes through the central portion of the outer cage 4 in the horizontal direction. The rotating shaft 20 and the gear 21 are made of resin, for example, polyvinyl chloride (PVC).

  The configuration of the inner car 3 will be described. FIG. 8 is a front view of the inner car 3. FIG. 9 is a top view of the inner car 3. FIG. 10 is a bottom view of the inner car 3. FIG. 11 is a cross-sectional view of the inner car 3.

  The inner cage 3 includes a cylindrical portion 23 and a bottom portion 24. The cylindrical portion 23 and the bottom portion 24 are formed with through holes 25 through which the object to be processed cannot pass.

  As shown in FIGS. 8 and 9, the cylindrical portion 23 has a cylindrical shape, and a bottom portion 24 is connected to the lower portion. As shown in FIG. 9, the bottom portion 24 has a circular shape that is a cross-sectional shape of the cylindrical portion 23, and has corners that are easy to insert into the outer cage 4. Since the inner cage 3 has a circular cross section perpendicular to the vertical direction, it can be preferably used in a drying apparatus used after post-treatment, such as a centrifugal dehydrator. Accordingly, the object to be processed can be dried while being placed in the inner basket 3 without replacing the object to be processed with another container.

  Although not shown in FIGS. 8 to 10, the through hole 25 is formed on the entire surface of the cylindrical portion 23 and the bottom portion 24. By so doing, when the inner car 3 is immersed in the processing liquid, the object to be processed in the inner car 3 is also immersed in the processing liquid.

  The cylindrical portion 23 is provided with four reinforcing belts 26 for reinforcing the inner car 3. The reinforcing belt 26 is horizontal and is installed on the outside of the cylindrical portion 23 so as to go around. As shown in FIG. 8, a handle 28 is formed on the reinforcing belt 26 that is installed closest to the opening of the inner car 3. The handle 28 is used for hooking a transportation means such as a carrier arm when the inner car 3 is transported.

  The tapered portion 29 is installed inside the cylindrical portion 23 as shown in FIGS. 9 and 11. The taper portion 29 has one end face installed inside the cylindrical portion 23. Further, the upper bus bar is horizontal, and the lower bus bar is inclined so as to approach the upper bus bar. The other end surface is smaller than the end surface in contact with the inside of the cylindrical portion 23. Furthermore, the lower bus and the upper bus may intersect. That is, the end surface that is not in contact with the inside of the cylindrical portion 23 may not exist. Further, the taper portion 29 is fixed to the cylindrical portion 23 with bolts 27.

  The mesh 30 is disposed along the inner wall of the inner car 3. By doing so, the object to be processed does not directly hit the inner cage 3, so that the object to be processed is scratched or the film is less dropped. Furthermore, in the drying process, the workpiece is easily dried. Without the mesh 30, there is an object to be processed that remains stuck to the inner car 3 in the drying process, and thus an object to be processed that is not dried is generated.

  Further, as shown in FIG. 11, the mesh 30 is connected to the tapered portion 29. That is, since the mesh 30 is connected to the taper portion 29, when replacing the mesh 30, the bolt 27 fixing the taper portion 29 can be removed and the mesh 30 can be easily replaced together. The inner cage 3 is made of metal, for example, stainless steel (SUS304).

  The configuration of the lid 5 will be described. FIG. 12 is a top view, a front view, and a right side view of the lid 5. FIG. 12A is a top view of the lid 5. FIG. 12B is a front view of the lid 5. FIG. 12C is a right side view of the lid 5. Note that FIG. 12 does not show the shaft.

  The lid 5 includes a lid surface portion 31, a holding bolt 32, and a shaft (not shown). The lid surface portion 31 is formed with a through hole 34 through which an object to be processed cannot pass. Although not shown in FIG. 12A, the through hole 34 is formed on the entire surface of the lid surface portion 31.

  The holding bolt 32 pushes down the center portion of the lid surface portion 31 by a shaft (not shown). As shown in FIGS. 12A to 12C, the holding bolt 32 is supported by the holding bolt support 35 at the center of the lid surface portion 31. The height of the holding bolt 32 can be finely adjusted by the bolt to be used. By adjusting the height of the holding bolt 32, it is possible to adjust the force by which the holding bolt 32 is pushed down by the shaft and the center portion of the lid surface portion 31 is pressed.

  The inner cage 3 fitted with the lid 5 will be described. FIG. 13 is a front view of the inner car 3 with the lid 5 attached. FIG. 14 is a top view of the inner car 3 with the lid 5 attached. FIG. 15 is a cross-sectional view taken along section line S3-S3 in FIG. 16 is a cross-sectional view taken along section line S4-S4 in FIG.

  The lid 5 is stacked on the tapered portion 29 in the inner car 3 as shown in FIGS. Further, the holding bolt 32 is pushed down by the shaft 33 and the center portion of the lid surface portion 31 is pressed down. By doing so, the lid 5 is attached to the inner car 3. Moreover, the shaft 33 is supported by the lid support 15 of the outer cage 4 as shown in FIGS. Therefore, by attaching the lid 5 to the inner car 3, the inner car 3, the outer car 4, and the lid 5 are integrated. Since the shaft 33 is made of metal, for example, titanium, the shaft 33 has sufficient strength.

  FIG. 17 is a diagram illustrating a mechanism for pressing the holding bolt 32 by the shaft 33. FIG. 17A is a diagram in which the pressing bolt 32 is not pressed by the shaft 33, and FIG. 17B is a diagram in which the pressing bolt 32 is pressed by the shaft 33.

  The shaft 33 includes a shaft body 36, a rotating shaft 37, and a rotating rod 34. The shaft 33 is an eccentric shaft in which the center of the rotating shaft 37 and the center of the shaft main body 36 are shifted. Further, as shown in FIGS. 13 to 16, the shaft 33 has a rotating shaft 37 supported by the lid support 15. Therefore, even if the shaft 33 is rotated around the axis of the rotary shaft 37 by the rotary rod 34, the position of the center C of the rotary shaft 37 does not change.

  As shown in FIGS. 17A and 17B, the distance D1 between the center C of the rotating shaft 37 and the lower end surface of the shaft body 36 is approximately about the axis of the rotating shaft 37 by the rotating rod 34. When rotated 90 degrees, a distance D2 between the center C of the rotating shaft 37 and the lower end surface of the shaft body 36 is obtained. Therefore, when the shaft 33 is rotated about 90 degrees around the axis of the rotary shaft 37 by the rotary rod 34, the shaft 33 can push down the holding bolt 32 by the distance A which is the difference between the distance D2 and the distance D1. .

  FIG. 18 is a schematic diagram when the lid 5 is attached to the inner car 3. As shown in FIG. 18, the holding bolt 34 is pushed down by the shaft 33, and the center portion of the lid surface portion 31 is pressed down. That is, the lid surface portion 31 is configured to bulge inside the inner cage 3. By doing so, there is no gap between the lid surface portion 31 and the taper portion 29 of the inner cage 3, and even if a very thin workpiece, for example, a washer having a thickness of 0.5 mm, There is no entry between the car 3 and the lid 5.

  Furthermore, when the screw-type lid and the peripheral portion of the lid are pressed, the lid cannot be strongly tightened to the inner cage, and when the object to be treated falls and collides with the lid during processing, the lid gradually becomes loose. However, when the central portion of the lid surface portion 31 is pushed down, even if the inner basket 3 is rotated and the object to be processed falls on the lid 5, the attachment of the lid 5 to the inner basket 3 does not loosen.

  Moreover, since the processing apparatus 1 mounts the lid 5 on the inner car 3, the amount of objects to be processed that can be stored in the inner car 3 is smaller than that of a basket type processing apparatus in which the lid cannot be mounted. Can do a lot. Specifically, although it varies depending on the object to be processed, the basket type processing apparatus is preferably 1/4 or more and 2/5 or less of the car in the apparatus, whereas the processing apparatus 1 is 1 / of the inner car 3. 2 or more and 4/5 or less are preferable.

  The operation | movement which processes a to-be-processed object using the processing apparatus 1 is demonstrated. FIG. 19 is a schematic cross-sectional view showing the processing apparatus 1 rotating the outer car 4 in which the inner car 3 is integrated by the lid 5.

  As shown in FIG. 1, the processing apparatus 1 stores an object 9 to be processed in a storage space 10 in an inner car 3, and integrates the inner car 3 and the outer car 4 with a lid 5. As shown in FIGS. 19 (a) and 19 (b), the processing apparatus 1 is configured so that the rotating basket 6 is used to rotate the outer car 4 integrated with the inner car 3 so that the rotation axis is perpendicular to the vertical direction. Rotate. Further, the outer cage 4 is rotated in the processing liquid 8. By doing so, the posture of the workpiece 9 in the processing liquid 8 can be greatly changed. Therefore, regardless of the shape of the object 9 to be processed, the object 9 can be processed without causing a defective product such as a touch.

  Moreover, after processing the to-be-processed object 9, in order to dry the to-be-processed object 9, it is not necessary to replace the to-be-processed object 9 with another container. That is, only the inner car 3 can be transported from the processing apparatus 1 to a drying device such as a centrifugal dehydrator and dried while the workpiece 9 is stored in the inner car 3. Therefore, the object 9 is not rubbed by replacing the container, and the film can be prevented from falling off.

  The rotation speed for rotating the outer cage 4 is preferably 5 rpm or more and 8 rpm or less, more preferably 6 rpm or more and 8 rpm or less, and further preferably 6 rpm or more and 7.89 rpm or less. When the rotational speed is less than 5 rpm, defective products such as touch are about 3% to 5%, especially tens of percent in the case of a thin processed material. If the rotation speed is higher than 8 rpm, the object to be processed will be stuck or the processing liquid will be scattered from the processing liquid storage tank. Moreover, in the case of a workpiece to be easily damaged such as an external screw, the rotation speed is particularly preferably 6 rpm or more and 7 rpm or less.

  The treatment liquid 8 may be any treatment liquid that contacts the object to be treated and treats the object to be treated. For example, trivalent and hexavalent chromate treatment liquids are used for post-treatment after galvanization. Can be used. By using the chromate treatment liquid, chromate treatment can be performed without causing touch.

  The treatment liquid storage tank 2 is preferably a storage tank having a depth of 80 cm or more and 100 cm or less. The inner cage 3 is preferably a container having a depth of 30 cm or more and 50 cm or less, and the rotary shaft 20 is preferably 50 cm or more and 60 cm or less from the bottom of the treatment liquid storage tank 2.

  FIG. 20 is a schematic view showing a processing apparatus 41 according to another embodiment of the present invention. Fig.20 (a) is a front view of the processing apparatus 41 which is other embodiment of this invention. FIG. 20B is a top view of the processing apparatus 41 according to another embodiment of the present invention. FIG.20 (c) is a right view of the processing apparatus 41 which is other embodiment of this invention.

  The processing device 41 is the same as the processing device 1 except that an arm 42 for carrying the outer car 4 is installed. The arm 42 is installed on the rotating shaft 20 of the outer cage 4 as shown in FIGS. The arm 42 is connected to a carrier means (not shown) such as a carrier. By doing so, the processing apparatus 41 can transport the outer car 4 together with the inner car 3 containing the object to be processed by the transporting means.

  When processing an object to be processed using a plurality of processing liquids, the inner car 3 containing the object to be processed is extracted from the outer car 4 and the inner car 3 is moved, or the processing liquid in the processing liquid storage tank 2 is replaced. There is no need to do. That is, while the inner car 3 is housed in the outer car 4, the outer car 4 is transported to the processing liquid storage tank 2 using a transporting means such as a carrier, the gear 21 installed in the outer car 4, and the processing liquid. It is only necessary to insert the outer cage 4 into the treatment liquid storage tank 2 so that the gear 11 installed in the storage tank 2 is matched.

  Further, except when the inner car 3 is accommodated in the outer car 4, the opening of the inner car 3 does not have to be upward, so that it can be easily treated with a plurality of processing liquids.

  Hereinafter, comparison of evaluation between the case where the processing apparatus 1 according to the present invention is used and the case where a conventional processing apparatus (a barrel type processing apparatus and a basket type processing apparatus) is used will be described.

  Table 1 shows the evaluation results when post-processing was performed using the processing apparatus 1, the barrel type processing apparatus, and the basket type processing apparatus according to the present invention. In the post-treatment, the treatment object was subjected to chromate treatment using each treatment apparatus, and evaluated according to an evaluation method described later.

  Note that symbols such as “◎”, “◯”, “Δ”, and “x” described in the description of the evaluation items are symbols indicating evaluation results used in Table 1. “◎” indicates very good, “○” indicates excellent, “△” indicates that it is practical, and “×” indicates that practical use is difficult. Indicates.

[Evaluation methods]
(Change in posture)
The posture change is evaluated by visual observation of the posture change of the object to be processed using a washer as the object to be processed.
A: The posture changes sufficiently even for a very thin workpiece.
○: If the object to be processed has a flat surface and the object to be processed with large unevenness, the posture changes sufficiently.
Δ: If the object to be processed has large unevenness, the posture changes sufficiently.
X: Even if it is a to-be-processed object with a large unevenness | corrugation, body posture change is inadequate.

(touch)
The touch uses a washer as an object to be processed, and visually evaluates whether or not the processed washer is touched according to the following criteria.
(Double-circle): After a process, a touch is confirmed only to less than 3% of to-be-processed objects.
◯: Touch is confirmed after 3% or more and less than 20% of the object to be processed.
(Triangle | delta): After a process, a touch is confirmed by 20% or more and less than 70% of a to-be-processed object.
X: Touch is confirmed to 70% or more of to-be-processed objects after a process.

(Scraping / dropping of film)
For scrubbing / dropping off the film, a washer is used as an object to be treated, and the treated washer is evaluated according to the following criteria.
A: After the treatment, rubbing / dropping of the film is confirmed only to less than 3% of the object to be treated.
○: After treatment, rubbing / dropping of the film is confirmed in 3% or more and less than 20% of the object to be treated.
Δ: After treatment, rubbing / dropping of the film is confirmed in 20% or more and less than 60% of the object to be treated.
X: After the treatment, rubbing / dropping of the film is confirmed in 60% or more of the object to be treated.

(Flaw)
Scratches use a washer as an object to be processed, and the treated washer is evaluated according to the following criteria.
(Double-circle): A crack is confirmed only to 3% of to-be-processed objects after a process.
○: After the treatment, scratches are confirmed in 3% or more and less than 20% of the workpiece.
(Triangle | delta): After a process, a flaw is confirmed by 20 to 40% of a to-be-processed object.
X: Scratches are confirmed in 40% or more of the workpieces after treatment.

(Input amount)
The input amount is evaluated according to the following criteria.
(Double-circle): The to-be-processed object of 80% or more of the accommodation volume of a container can be processed.
◯: An object to be processed that is 40% or more and less than 80% of the capacity of the container can be processed.
(Triangle | delta): The to-be-processed object of 20 to 40% of the accommodation volume of a container can be processed.
X: A to-be-processed object can be processed only less than 20% of the accommodation volume of a container.

(Processing liquid reaction rate)
The treatment liquid reaction rate is evaluated according to the following criteria using a washer as a workpiece.
A: Processing takes less than 45 seconds.
○: The process takes 45 seconds or more and less than 60 seconds.
Δ: The process takes 60 seconds or more and less than 90 seconds.
X: Processing takes 90 seconds or more.

  As shown in Table 1, the processing apparatus 1 according to the present invention has the largest change in the posture of the object to be processed, and the touch is hardly generated on the object to be processed. Since the processing apparatus 1 according to the present invention does not require replacement of the container, the film is not rubbed and dropped off. Moreover, since the processing apparatus 1 which is this invention changes the posture of a to-be-processed object in a process liquid, it is less likely to be stuck to the to-be-processed object itself. Since the treatment apparatus 1 according to the present invention has a large change in posture, the reaction speed of the treatment liquid to the object to be treated is also high.

  On the other hand, the barrel-type processing apparatus has a large change in the posture of the object to be processed, and the touch is hardly generated on the object to be processed. However, since the barrel type processing apparatus needs to replace the container after the post-processing, the film is rubbed and dropped off at that time, and further flaws are generated. Further, the change in the posture of the object to be processed during processing is small as compared with the present invention.

  As in the present invention, since the basket type processing apparatus does not require replacement of the container after the post-processing, the coating is hardly rubbed and dropped off. However, the change in the posture of the object to be processed during processing is very small, so that touch occurs and the reaction speed of the processing liquid is slow. Furthermore, since it cannot be covered, the input amount, which is the amount of the object to be processed at one time, is not small.

Below, the Example using the processing apparatus 1 which is embodiment of this invention is shown.
In the example, the processing apparatus 1 was used under the following conditions.

The inner cage 3 has an outer wall height of 39.5 cm, an inner wall height of 31.0 cm, an outer wall diameter of 41.9 cm, and an inner wall diameter of 40.5 cm.
The outer cage 4 has a height of 43.0 cm and an outer diameter of 55.0 cm.

The treatment liquid storage tank 2 has an inner wall height of 85.0 cm and an inner wall width of 94.0 cm.
The rotation axis is at 55.0 cm from the bottom of the treatment liquid storage tank 2, and the liquid level of the treatment liquid is at 70.0 cm from the bottom of the treatment liquid storage tank 2.

The treatment liquid is a hexavalent chromate treatment liquid having a pH of 2.10.
The object to be processed was a washer having an outer diameter of 23 mm, an inner diameter of 12 mm, and a thickness of 1.6 mm. The amount charged into the container is 55% (about 50 kg) of the capacity of the inner cage.

The rotation speed is 7.87 rpm.
The comparative example is the same as the example except that the rotation speed of the container is 4.29 rpm instead of 7.87 rpm.

  By doing so, in the Example, the to-be-processed object with a touch was not confirmed after the chromate process. Further, in the comparative example, after the chromate treatment, the object to be processed with touch occurred about 3% to 5% of the entire object to be processed.

It is a schematic sectional drawing which shows the processing apparatus 1 which is embodiment of this invention. It is a front view of the outer cage 4. 4 is a top view of the outer cage 4. FIG. It is a side view of the outer cage 4. It is a bottom view of the outer cage 4. It is sectional drawing seen from cut surface line S1-S1 of FIG. It is sectional drawing seen from cut surface line S2-S2 of FIG. It is a front view of the inner cage 3. FIG. 4 is a top view of the inner cage 3. It is a bottom view of the inner cage 3. It is sectional drawing of the inner cage | basket | car 3. It is a top view, a front view, and a right side view of the lid 5. It is a front view of the inner cage | basket | car 3 with which the lid | cover 5 was mounted | worn. FIG. 3 is a top view of the inner car 3 with the lid 5 attached. It is sectional drawing seen from cut surface line S3-S3 of FIG. It is sectional drawing seen from cut surface line S4-S4 of FIG. It is a figure explaining the mechanism which presses down holding bolt 32 with shaft 33. It is a schematic diagram when the lid 5 is attached to the inner cage 3. 2 is a schematic cross-sectional view showing a processing apparatus 1 rotating an outer car 4 in which an inner car 3 is integrated by a lid 5. FIG. It is the schematic which shows the processing apparatus 41 which is other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,41 Processing apparatus 2 Processing liquid storage tank 3 Inner basket 4 Outer basket 5 Lid 6 Rotating means 7 Storage space 8 Processing liquid 9 Processed object 10 Storage space 11 Gear 12 Circumferential trunk | drum 13 Bottom plate 14 Inner basket fixing plate 15 Cover support 16 Rotating shaft fixing plate 17, 19, 25, 34 Through hole 20 Rotating shaft 21 Gear 22 Rotating axis 23 Cylindrical portion 24 Bottom portion 26 Reinforcement belt 27 Bolt 28 Handle 29 Taper portion 30 Mesh 31 Lid surface portion 32 Holding bolt 33 Shaft 35 Holding bolt support Tool 36 Shaft body 37 Rotating shaft 42 Arm

Claims (10)

A treatment liquid storage tank for storing a treatment liquid for treating the surface of the workpiece;
An inner container having a storage space for storing the object to be processed, and the storage space communicating with the outside through a plurality of holes through which the object to be processed cannot pass;
An outer container containing an inner container and having a plurality of holes;
A lid that covers the accommodation space of the inner container and integrates the inner container and the outer container;
Rotating means for rotating the outer container so that the rotation axis is perpendicular to the vertical direction,
A processing apparatus for rotating an outer container integrated with an inner container by a lid in a processing liquid.   The processing apparatus according to claim 1, wherein the rotating means rotates the outer container so that an object to be processed in the inner container exists in a lower limit region from the liquid level of the processing liquid in the processing liquid storage tank.   3. The processing apparatus according to claim 2, wherein the rotating means has a rotating shaft in a lower limit region from the liquid level of the processing liquid in the processing liquid storage tank. The rotating means includes a rotating shaft,
The processing apparatus according to claim 1, wherein the rotation shaft is installed outside the outer container.   The processing apparatus according to claim 4, wherein the rotation shaft is supported by the processing liquid storage tank.   The processing apparatus according to claim 1, wherein the inner container is provided with a mesh inside.   The processing apparatus according to claim 1, wherein the inner container has a circular cross section perpendicular to the vertical direction.   The processing apparatus according to claim 1, wherein the processing liquid is a chromate processing liquid.   The processing apparatus according to any one of claims 1 to 8, further comprising a transporting means for transporting the outer container while the inner container and the outer container containing the objects to be processed are integrated. .   The processing method characterized by processing the surface of a to-be-processed object using the processing apparatus of any one of Claims 1-9.

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