JP3539744B2 - Surface treatment equipment - Google Patents

Description

[0001]
[Industrial applications]
According to the present invention, a work such as a screw or a metal plate housed in a housing (for example, a housing basket) is immersed in a processing solution such as a plating solution or washing water to perform plating, painting, washing and other surface treatments on the surface of the work. It is related to a device for performing.
[0002]
[Prior art]
This type of surface treatment apparatus treats a container so as to averagely expose a large number of workpieces contained in the container to the processing liquid and to uniformly contact and flow the processing liquid on a workpiece surface having a complicated shape. A reciprocating mechanism for reciprocating in the liquid is provided. As the reciprocating motion, a motion that appropriately combines a reciprocating vertical movement, a reciprocating rotation, and a reciprocating swing that swings like a pendulum is used.
[0003]
Such a reciprocating movement of the work accommodated in the container changes the posture and the assembled state, and the orientation of the work with respect to the relative flow direction of the processing liquid changes, so that the entire surface of the work comes into contact with the processing liquid. Become like In other words, the reciprocating movement of the container causes the processing liquid to collide with the upper and lower surfaces of the work and instantaneously lifts the work. At this time, the floating work is rolled by the rotation or swing of the container to change the posture. Then, the direction of the work with respect to the relative flow of the processing liquid caused by the rocking or the rotation is changed so that the entire surface of the work contacts the processing liquid under as uniform conditions as possible. For this reason, in the conventional apparatus, reciprocating motion such as a combination of reciprocating lifting and lowering and reciprocating rotation, a combination of reciprocating lifting and lowering and a pendulum motion having a large arm length, and a combination of a pendulum motion having a short arm length and reciprocating rotation are used. Often.
[0004]
[Problems to be solved by the invention]
However, as shown in FIG. 4, in the case of causing the container 3 to reciprocate, the contact condition between the workpieces 30a and 30b located at the peripheral portion of the container and the workpiece 30 located at the center of the container 3 is large. There are drawbacks that are different. That is, the peripheral works 30a and 30b collide with the processing liquid at a high speed with the rotation of the container 3, and the work rolls around the radial axis of the container (rotation in the direction of arrow r in FIG. 4). Movement) is frequently performed, but the work 30 at the center only comes into static contact with the processing liquid, and the work does not roll much. On the other hand, in the swing motion shown in FIG. 5, the processing liquid collides with a surface orthogonal to the swing direction X of the work, and the work 30 rolls around a horizontal axis orthogonal to the swing direction X (FIG. 5). Is frequently performed, but it is difficult to perform rolling about an axis parallel to the swing direction X or rolling of a work around a vertical axis. The contact between the vertical surface (the surface 32 of the cubic workpiece 30 in FIG. 5) and the processing liquid tended to be insufficient.
[0005]
Also, in any of the above reciprocating motions, if the work in the container is not sufficiently rolled, only a specific surface of the work repeatedly contacts the processing liquid to uniformly cover the entire surface of the work. There was a problem that processing could not be performed.
[0006]
Therefore, an object of the present invention is to provide a surface treatment apparatus that does not change the contact condition with the processing liquid depending on the position and direction of the work in the container, and thus can perform the surface treatment of the work more uniformly. I have.
[0007]
[Means for Solving the Problems]
Surface treatment apparatus according to the present invention, a detent mechanism 12 for linking the support 1 relative pivotally supported at an eccentric position of the rotating body 10 rotating or reciprocating rotation provided on the stationary member 14, the support It is characterized in that a housing 3 for housing a work to be processed on the body 1 is mounted.
[0008]
[Action]
In the surface treatment apparatus provided with the above-described mechanism, the support 1 makes a revolving motion without rotation by rotating the rotating body 10, and the container 3 suspended on the support also makes a revolving motion without rotation. . Since the orbital motion without rotation causes each point of the container 3 to perform a circular motion (arrow Ω in FIG. 2) in the same direction and at the same speed, the motion mode of the work 30 in the container 3 is It is constant regardless of the position of the work. In addition, the circular motion without rotation causes the entire periphery of the work 30 to collide with the processing liquid under the same conditions even if the work 30 does not roll. By combining the revolving motion without rotation and the reciprocating up-and-down movement, the work 30 is rotated. The processing liquid can be uniformly flow-contacted up, down, front, back, left and right to uniformly treat the entire surface of the work.
[0009]
Further, since the moving direction of the work changes by 360 degrees during one revolution, the work rolls in all directions (arrow ω in FIG. 3), and at this point, more uniform processing of the work surface is ensured. .
[0010]
【Example】
1 to 3 show an embodiment of the present invention. The work 30 is housed in a housing cage 3 held by a holding tool 2 provided at the lower end of the support shaft 1 and immersed in a processing solution in a processing tank (not shown) to perform surface treatment such as plating, painting, and cleaning. . The gripper 2 has a push rod 4 at the center, and the tip of the push rod and the middle position of the swinging claw 5 are connected by a connection link 6 which is inclined. When the push rod 4 moves down, the connecting link 6 pushes the swinging pawl 5, and the swinging pawl 5 pivots outward around its fulcrum 7, and the handle 8 of the storage basket 3 holds the V-groove 9 of the swinging pawl 5. To hold the storage basket 3. The support shaft 1 is rotatably and axially movably fitted into an eccentric hole 11 provided in a vertical rotation shaft 10, and a detent pin 12 erected at an upper end thereof in a direction perpendicular to the axis is mounted on the lifting frame 13. It is loosely fitted in the vertical guide slit 15 of the provided rotation preventing plate 14 and is vertically movable, swingable, and can be freely inserted and removed.
[0011]
The rotation shaft 10 is rotatably supported by bearings 18 and 19 provided on the lifting frame 13, and is drivingly connected to a forward / reverse rotation motor 21 via a belt transmission device 20. Therefore, when the forward / reverse rotation motor 21 repeats the forward rotation and the reverse rotation at a set time interval, the rotation shaft 10 reciprocates and is supported at the eccentric position of the rotation shaft 10 to prevent the rotation. The support shaft 1 regulated by the pin 12 revolves without rotation. The rotation angle of one forward or reverse rotation of the rotation shaft 10 is preferably at least 90 degrees, more preferably 360 degrees or more. When the rotation angle of the rotating body 10 is about 90 degrees, a crank mechanism can be employed as the reciprocating rotating mechanism.
[0012]
The upper end of the support shaft 1 is connected via a crank rod 24 to a crank pin 23 pivotally driven by a vertical motion motor 22 mounted on the lifting frame 13, and is rotated in the axial direction by rotating the vertical motion motor 22. Reciprocate. Both ends of the crank rod 24 are connected to the crank pin 23 and the support shaft 1 via a spherical joint so as not to limit the revolving motion of the support shaft 1. Therefore, the storage basket 3 suspended at the lower end of the support shaft 1 reciprocates by a combination of a revolving motion without rotation shown by an arrow Ω in FIG. 2 and a reciprocating vertical movement in a direction perpendicular to the plane of FIG.
[0013]
The elevating frame 13 is mounted so as to be able to move up and down along the guide column 25, and is driven up and down at appropriate times by an elevating drive device 26 including a slider crank mechanism (piston crank mechanism). By the elevating operation of the elevating frame 13, the work accommodated in the accommodation cage 3 is immersed in the treatment liquid and the operation of lifting the same is performed.
[0014]
【The invention's effect】
In this way, when the container 3 is caused to perform a revolving motion without rotation, for example, in the case of the work 30 having the holes 31 shown in FIGS. As shown in FIG. 5, in a work 30a in which the rotation direction R or the swing direction X is parallel to the hole 31, the processing liquid always flows into and out of the hole 31, whereas the hole 31 Since the processing liquid in the hole 31 hardly flows in the facing work 30b, the processing is incomplete. On the other hand, in the apparatus of the present invention, the relative flow direction of the processing liquid with respect to the work 30 changes during one rotation of the container 3, so that the flow of the processing liquid in the hole 31 is uniform regardless of the direction of the hole 31. Is
[0015]
In the above, the work having the holes 31 has been described in order to make it easier to understand the effects of the present invention. However, the present invention is not limited to the case of the work having the holes, and the processing liquid flows from all directions of the work. The surface directed in each direction is uniformly treated, so that a more uniform surface treatment can be performed on a workpiece having a complicated shape. In addition, since the movements of the works located at the respective points of the container 3 are all the same, there is no non-uniform processing depending on the position of the work.
[0016]
Regarding the rolling motion of the work, only the rolling in a certain direction shown in FIGS. 4 and 5 (the rolling in the directions shown by arrows r and x) is emphasized in the reciprocating rotation and the reciprocating swing. On the other hand, in the apparatus of the present invention, the rolling of the work in all directions (arrow ω in FIG. 3) occurs uniformly, and in this regard, the work can be more uniformly surface-treated.
[0017]
The uniformity of the rolling direction of the work is achieved by revolving the container 3 by 90 degrees or more. Therefore, if the workpiece has a shape that easily rolls, a uniform surface treatment can be performed even when the rotating angle of the rotating body 10 in the forward and reverse directions is about 90 degrees. When the workpiece has a shape that does not easily roll, it is more preferable to reciprocate the rotating body 10 at an angle of 360 degrees or more.
[0018]
The above description is a stylized description, and even in the conventional apparatus, the direction of the work is changed due to the turbulence of the liquid flow and the collision with the container and the adjacent work, so that a uniform surface treatment can be performed. ADVANTAGE OF THE INVENTION According to the apparatus of this invention, there exists an effect that more uniform surface treatment can be performed more quickly, and there exists an effect that generation | occurrence | production of the processing failure (processing unevenness) in a workpiece of a complicated shape can be reduced more.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an apparatus according to an embodiment; FIG. 2 is a plan view schematically showing movement of a work in the apparatus of the present invention; FIG. 3 is a plan view schematically showing movement of one work; FIG. 5 is a plan view schematically showing the movement of the work in the case of reciprocating rotation. FIG. 5 is a plan view schematically showing the movement of the work in the case of reciprocating swing.
DESCRIPTION OF SYMBOLS 1 Support shaft 3 Storage basket 10 Rotation shaft 12 Detent pin 14 Detent plate

Claims (1)

Stationary member (14) to the detent mechanism (12) rotates to relative pivotally supported at an eccentric position of the reciprocating rotation to the rotating body (10) of the support (1) provided with the associated, the support the container for accommodating the workpiece to be processed (1) (3) is characterized in that it is mounted, the surface treatment equipment.

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