JPH06248477A - Revolving mechanism for surface treatment device - Google Patents

Abstract

PURPOSE:To make rapid surface treatment of works by relatively turnably supporting a support provided with a stopper mechanism around the eccentric position of a turning body and mounting a housing means for housing the works on this support. CONSTITUTION:A revolving shaft 10 turns back and forth and a supporting shaft 1 regulated by a stopper pin 12 revolves without rotating when a motor 21 repeats forward run and backward run. The supporting shaft 1 is moved back and forth in an axial direction by means of a crank pin 23 and a crank rod 24 when a vertically moving motor 22 rotates. Then, the housing cage 3 suspended at the bottom end of the supporting shaft 1 is moved back and forth by a combination of the revolution without rotation and forward and backward lifting. Since the treating liquid is thereby made to flow from all the directions of the work, the uniform surface treatment of the works having intricate shapes is possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to plating and coating on the surface of a work such as a screw and a sheet metal fitting, which is housed in a housing (eg, a housing basket), by immersing the work in a processing solution such as plating solution or cleaning water. , Cleaning and other surface treatment devices.

[0002]

2. Description of the Related Art This type of surface treatment apparatus is used for averaging a large number of works contained in a container and exposing them to the treatment liquid, and for uniformly contacting and flowing the treatment liquid on the surface of a work having a complicated shape. , A reciprocating mechanism for reciprocating the container in the processing liquid. As the reciprocating motion, a motion in which a reciprocating up and down movement, a reciprocating rotation, and a reciprocating oscillating motion that oscillates like a pendulum are appropriately combined is usually used.

The work accommodated in the container changes its posture and collective state due to such reciprocal movement, and the orientation of the work with respect to the relative flow direction of the treatment liquid changes, so that the entire surface of the work is treated liquid. Come into contact with. That is, when the container is reciprocally moved up and down, the treatment liquid collides with the upper and lower surfaces of the work and the work is momentarily floated up. At this time, the lifted work is rolled by the rotation or swing of the container and the posture is changed. Then, the orientation of the work is changed with respect to the relative flow of the treatment liquid caused by the swinging and the rotation, so that the entire surface of the work comes into contact with the treatment liquid under the condition as uniform as possible. For this reason, in the conventional apparatus, reciprocating motion such as a combination of reciprocating up and down and reciprocating rotation, a combination of reciprocating up and down and a pendulum motion with a large arm length, a combination of a pendulum motion with a short arm length and a reciprocating motion is used. Often.

[0004]

However, as shown in FIG. 4, what causes the container 3 to reciprocately rotate includes the works 30a and 30b located in the peripheral part of the container and the work 30 located in the central part. However, there is a drawback that the contact conditions with the treatment liquid are greatly different. That is, the workpieces 30a and 30b in the peripheral portion collide with the treatment liquid at a high speed as the container 3 rotates, and the workpieces roll around the radial axis of the container (arrow r in FIG. 4).
However, the work 30 in the central portion makes static contact with the processing liquid, and rolling of the work does not occur much. On the other hand, in the swing motion shown in FIG. 5, the processing liquid collides with the surface of the workpiece orthogonal to the swing direction X, and the workpiece 30 rolls about the horizontal axis orthogonal to the swing direction X (see FIG. (Rotation in the direction of arrow x) is also frequently performed, but it is difficult to perform rolling around an axis parallel to the swinging direction X or rolling of a workpiece around the vertical axis. There was a tendency for insufficient contact between the vertical surface (the surface 32 in the cubic work 30 in FIG. 5) and the treatment liquid.

In any of the above-mentioned reciprocating movements, if the work is not sufficiently rolled in the container, only a specific surface of the work is repeatedly brought into contact with the treatment liquid, and the entire surface of the work is However, there is a problem in that it cannot be uniformly processed.

Therefore, the present invention provides a surface treatment apparatus which does not change the contact condition with the treatment liquid depending on the position and direction of the work in the container, and which can perform the surface treatment of the work more uniformly. Is an issue.

[0007]

In the surface treatment apparatus according to the present invention, a support body 1 provided with a detent mechanism 12 linked to an immovable member 14 at an eccentric position of a rotating body 10 that rotates or reciprocates is relatively rotated. It is characterized in that a container 3 for movably supporting and mounting a work to be processed is mounted on the support 1.

[0008]

The surface treatment apparatus having the above-mentioned mechanism is provided with the rotating body 1.
By rotating 0, the support 1 makes an orbital motion without rotation, and the container 3 suspended therein also makes an orbital motion without rotation. In the revolving motion without rotation, each point of the container 3 is circularly moved in the same direction at the same speed (arrow Ω in FIG. 2). Therefore, the movement mode of the work 30 in the container 3 is as follows. It becomes constant regardless of the position of the work. Further, due to the circular motion without rotation, the entire periphery of the work 30 will collide with the treatment liquid under the same conditions even if the work 30 does not roll, and by combining the revolution motion without rotation and the reciprocating lifting motion, It becomes possible to uniformly treat the entire surface of the workpiece by bringing the treatment liquid into fluid contact evenly in the upper, lower, front, rear, left, and right.

Further, since the moving direction of the work changes 360 degrees during one revolution of the revolution, the work rolls in all directions (arrow ω in FIG. 3), and in this respect as well, a more uniform treatment of the work surface is possible. Guaranteed.

[0010]

1 to 3 show an embodiment of the present invention. The work 30 is stored in a storage basket 3 held by a holding tool 2 provided at the lower end of the support shaft 1 and immersed in a processing liquid in a processing tank (not shown) for surface treatment such as plating, painting and cleaning. . The gripping tool 2 has a push rod 4 in the center, and the tip of the push rod and the swing claw 5
Are connected by an oblique connecting link 6. When the push rod 4 moves downward, the connecting link 6 pushes the swing claw 5, and the swing claw 5 rotates outward around the fulcrum 7, and the handle 8 of the storage basket 3 has the V groove 9 of the swing claw 5. To hold the storage basket 3 by pressing. The support shaft 1 is inserted into an eccentric hole 11 provided in a vertical rotation shaft 10 so as to be rotatable and axially movable, and a detent pin 12 which is vertically installed at the upper end of the support shaft 1 on an elevating frame 13. Anti-rotation plate 14 provided
Is vertically movably fitted in the vertical guide slit 15.

The rotating shaft 10 is rotatably supported by bearings 18 and 19 provided on the elevating frame 13, and is drivingly connected to a forward / reverse rotation motor 21 via a belt transmission device 20.
Therefore, the forward / reverse rotation motor 21 repeats normal rotation and reverse rotation at a set time interval, whereby the rotary shaft 10 reciprocally rotates,
The support shaft 1 which is pivotally supported at the eccentric position of the rotation shaft 10 and whose rotation is restricted by the rotation stop pin 12 revolves around its axis without rotation. The rotation angle of the rotation shaft 10 for one forward rotation or reverse rotation is preferably at least 90 degrees or more.
More preferably, it is 60 degrees or more. When the rotation angle of the rotating body 10 is about 90 degrees, it is also possible to employ a crank mechanism as the reciprocating rotation mechanism.

The upper end of the support shaft 1 is connected via a crank rod 24 to a crank pin 23 that is swiveled by a vertical movement motor 22 mounted on the elevating frame 13. By rotating the vertical movement motor 22, Reciprocates in the axial direction. Both ends of the crank rod 24 are connected to the crank pin 23 and the support shaft 1 via spherical joints so as not to limit the revolution movement of the support shaft 1. Therefore, the storage basket 3 suspended at the lower end of the support shaft 1 reciprocates by the combination of the revolution not accompanied by the rotation shown by the arrow Ω in FIG. 2 and the reciprocating elevation in the direction perpendicular to the paper surface of FIG.

The elevating frame 13 is mounted so as to be able to ascend and descend along a guide column 25, and an elevating and lowering drive device 26 comprising a slider crank mechanism (piston crank mechanism).
Is driven up and down at appropriate times. By the ascending / descending operation of the ascending / descending frame 13, the work stored in the storage basket 3 is dipped in the processing liquid and pulled up.

[0014]

As described above, 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. In the movement, as shown in FIGS. 4 and 5, in the work 30a in which the rotation direction R or the swinging direction X and the hole 31 are parallel to each other, the treatment liquid always flows into and out of the hole 31, whereas In the work 30b in which 31 is oriented in the orthogonal direction, the treatment liquid in the hole 31 hardly flows, so the treatment becomes incomplete. On the other hand, in the apparatus of the present invention, since the relative flow direction of the processing liquid with respect to the work 30 changes while the container 3 makes one rotation, the processing liquid in the holes 31 flows uniformly regardless of the direction of the holes 31. Be seen.

Although the work having the holes 31 has been described above in order to facilitate understanding of the effect of the present invention, the treatment liquid flows from all directions of the work, not limited to the work having the holes. Thus, the surface of the workpiece in each direction is uniformly treated, which enables more uniform surface treatment of the workpiece having a complicated shape. Further, since the movements of the works located at the respective points of the container 3 are all the same, the unevenness of the processing depending on the work containing positions does not occur.

As for the rolling motion of the work, only the rolling in the fixed direction shown in FIGS. 4 and 5 (the rolling in the directions indicated by the arrows r and x) is emphasized during the reciprocating rotation and the reciprocating swing. On the other hand, in the apparatus of the present invention, rolling of the work in all directions (arrow ω in FIG. 3) occurs uniformly, and in this respect also, a more uniform surface treatment of the work is possible.

The uniformity of the rolling direction of the work is achieved by revolving the container 3 by 90 degrees or more. Therefore, if the work has a shape that allows easy rolling, the rotating body 1
Even when the rotation angle of 0 in the forward and reverse directions is about 90 degrees, uniform surface treatment is possible. When the work has a shape that does not easily roll, it is more preferable to reciprocally rotate the rotating body 10 at an angle of 360 degrees or more.

The above description is a stylized description. Even in the conventional apparatus, the orientation of the work was changed due to the turbulence of the liquid flow and the collision with the container and the adjacent work, and the uniform surface treatment was performed accordingly. However, according to the apparatus of the present invention, there is an effect that a more uniform surface treatment can be performed more quickly, and the occurrence of processing defects (processing unevenness) in a workpiece having a complicated shape can be further reduced. is there.

[Brief description of drawings]

FIG. 1 is a perspective view showing an apparatus according to an embodiment.

FIG. 2 is a plan view schematically showing the movement of the work in the device of the present invention.

FIG. 3 is a plan view schematically showing the movement of one work.

FIG. 4 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 a work piece in the case of reciprocal swinging.

[Explanation of symbols]

 1 Support shaft 3 Storage basket 10 Rotating shaft 12 Anti-rotation pin 14 Anti-rotation plate

Claims (1)

[Claims] 1. A support body (1) provided with a detent mechanism (12) linked to an immovable member (14) at an eccentric position of a rotating body (10) that rotates or reciprocally rotates so as to be relatively rotatable. , This support
A revolving mechanism for a surface treatment apparatus, characterized in that a container (3) for accommodating a workpiece to be processed is attached to (1).