JP2684294B2 - Painting method and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating method and apparatus for coating both sides of a work with a coating gun arranged on one side of a work transfer path.

[0002]

2. Description of the Related Art Conventionally, according to Japanese Utility Model Laid-Open No. 61-44413, a reciprocator is provided on one side of a work transfer path so that a work is continuously transferred while being rotated, and a coating gun mounted on the reciprocator is attached to a rotation axis of the work. It is known to reciprocate in two directions and apply work on both sides by rotation of the work. In this case, the width of the coating pattern on a plane parallel to the work transfer path including the rotation axis of the work is It is common to use a single coating gun that is equivalent to the workpiece size in the orthogonal direction.

[0003]

SUMMARY OF THE INVENTION In the above, when the work is rotated 180 ° from one side facing the reciprocator placement side to the other side facing, one end of the work is rotated during the rotation. May approach the coating gun and paint may adhere to this area, causing paint dripping. An object of the present invention is to provide a coating method and apparatus capable of coating both side surfaces of a work without causing such sagging.

[0004]

In order to achieve the above object,
The coating device of the present invention is a device for coating both sides of a work by a coating gun arranged on one side of the work transfer path,
Conveying means that hangs the workpiece rotatably and conveys it continuously,
A reciprocator provided on one side of the work transfer path, having a rotating means for rotating the work during transfer and an arm reciprocating in the direction of the axis of rotation of the work; and the reciprocator in the work transfer direction. It is possible to move at a constant speed, and a plurality of coating guns are attached to the arm at a position apart from the plane where the individual coating patterns of these coating guns are parallel to the work transfer path including the rotation axis of the workpiece to the side where the coating guns are arranged.
Are spaced apart from each other, and are attached in a positional relationship such that a coating pattern having a width substantially equal to the work size in the direction orthogonal to the axis is obtained as a whole on the surface.

[0005]

[Operation] While moving the reciprocator at the same speed as the work, the arm is reciprocated in the rotation axis direction of the work. According to this, a plurality of coating guns mounted on the arm are reciprocally moved in the rotation axis direction while keeping the relative speed difference between the work transfer speed and zero, and the plurality of coating guns work together. The work is rotated within the coating pattern formed by applying the coating to both side surfaces of the work.

Here, the coating patterns of the respective coating guns are continuous with each other on a plane parallel to the work transfer path including the rotation axis of the workpiece, but the coating guns are coated at a portion near the reciprocator away from the plane. The patterns are separated from each other,
When the workpiece side edge in the direction orthogonal to the rotation axis approaches the reciprocator due to the rotation of the workpiece, the workpiece side edge enters the gap between the coating patterns of each coating gun, and the workpiece side edge gets too much paint. There is no such thing.

When the work is rotated while being conveyed, the work swings and uneven coating is likely to occur. Therefore, the reciprocator, which moves at the same speed as the work, is provided with a swing preventing means to swing the work. It is desirable to block it. In this case, if the rocking preventing means is constituted by a clamp member that clamps a rotating body provided on the rotation axis of the work through a roller, and if a drive means for rotating the roller is provided in the reciprocator, the work rocking will occur. It becomes possible to rotate the work on the reciprocator side while preventing the movement, and it becomes easy to synchronize the application work by the reciprocator and the rotation of the work.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, reference numeral 1 denotes a hanger conveyor, in which a hanger 4 is suspended via a trolley 3 on a conveyor rail 2 provided along a work transfer path, and the hanger 4 is provided with automatic two wheels. A work W composed of a vehicle body frame is suspended in two upper and lower stages, and the work W is continuously conveyed at a low speed.

A reciprocator 5 is provided on one side of the work transfer path.
Is provided so as to be movable in the front-rear direction and the lateral direction, and the reciprocator 5 has a pair of upper and lower arms 6 which are vertically movable.
6, a coating gun 7 is attached to each arm 6 as will be described later, and when the hanger 4 reaches a predetermined position, the reciprocator 5 is moved inward in the lateral direction toward the work transfer path and the work transfer speed is set. At a constant speed over a predetermined coating section, and at the same time reciprocally move each arm 6 in the vertical direction to coat the upper work W with the coating gun 7 attached to the upper arm 6 and The lower work W is coated by the coating gun 7 attached to the arm 6.

The trolley 3 of the hanger conveyor 1 is composed of an upper half portion 3a supported by the conveyor rail 2 and a lower half portion 3b for suspending the hanger 4, and the lower half portion 3b is
As shown in FIG. 2, a vertical spindle 3c attached to the lower end of the upper half 3a is slidably and rotatably supported on an upper end plate 3d of the lower half 3b, and the plate 3d and a spindle 3c for receiving the plate 3d are supported. The lower half 3b is rotatable when the lower half 3b is pushed up by an appropriate means by forming an engaging portion 3f that locks the lower half 3b on the surface facing the flange 3e at the lower end of the So that The pushing-up means of the lower half portion 3b is composed of, for example, a guide rail 8 provided so that a dust cover 3g fixed to the lower half portion 3b can be climbed up. At lower half 3b
To be rotatable.

Further, a rotating body 3h which is located above the dust cover 3g and is concentric with the support shaft 3c is attached to the lower half portion 3b, and the rotating body 3h is attached to the reciprocator 5 as shown in FIGS. A pair of clamp arms 9 and 9 that are opened and closed by a cylinder 9a are mounted to clamp the trolley 3, and the trolley 3 is oscillated by the clamp of the rotating body 3h, that is, the work W suspended by the trolley 3 via a hanger 4. I was able to prevent. Each clamp arm 9 is equipped with a roller 10 that abuts the peripheral surface of the rotating body 3h.
The roller 10 is driven to rotate so that the lower half portion 3b, that is, the hanger 4 can be rotated via the rotating body 3h. To explain this in detail, a drive sprocket 11 driven by a motor (not shown) provided in the reciprocator 5 coaxially with the pivot of the tail end of one clamp arm 9, and a roller 10 at the tip of the arm 9 coaxially. A driven sprocket 12 is provided, and both sprockets 11 and 12 are connected via a chain 13 so that the roller 10 can be rotationally driven. Instead of providing the drive motor for the roller 10, the reciprocator 5 may be provided with a drive shaft that is rotated by the forward movement thereof via the rack and pinion mechanism, and the drive sprocket 11 may be connected thereto.

A support rod 6a which is long in the front-rear direction is attached to the tip of each arm 6 of the reciprocator 5, and coating guns 7 are attached in pairs to the front and rear ends of the support rod 6a. As shown in FIG. 4, the coating pattern PF of the gun 7 and the coating pattern PR of the rear coating gun 7 are mutually on a plane A parallel to the rotation axis of the work W, that is, the work transfer path including the support shaft 3c. The coating pattern was continuously formed so as to have a work width in a direction orthogonal to the axis and a width substantially equal to that of the work as a whole. B in the drawing is a rotation locus of the side end of the work W.

Next, a coating work procedure by the apparatus of the above embodiment will be described. When the work W reaches the start position of the predetermined coating section, the reciprocator 5 is moved forward at the same speed as the work transfer speed, and the reciprocator 5 is moved inward in the lateral direction to move the pair of clamp arms 9 , 9 are made to face the front and rear of the rotating body 3h, and then the clamp arms 9, 9 are closed to clamp the rotating body 3h via the rollers 10 at the ends of the respective arms 9. Then, the roller 10 of one clamp arm 9 is driven to rotate the work W via the rotating body 3h, and at the same time, each arm 6 of the reciprocator 5 is reciprocally moved in the vertical direction to electrostatically coat the work W. . In this case, when the work W is in the direction orthogonal to the transport path during the rotation, the side end of the work W comes closest to the reciprocator 5 side, but in this state, the coating patterns PF, PR of the front and rear coating guns 7, 7 are formed. The side end of the work W enters the gap between them, and the paint does not adhere to the side end too much. And
Before reaching the end of the coating section, the work W is rotated twice, for example, to coat both side surfaces of the work W. When the end is reached, open the clamp arms 9, 9 and reciprocator 5.
Is moved laterally outward and the reciprocator 5 is returned to the rear in preparation for the next work.

By the above-mentioned painting work, almost the entire area of the work W is painted. However, if the work W has a complicated shape such as a body frame, local correction painting may be necessary. In this case, a correction coating section is provided after the coating section by the reciprocator 5, and the coating robot performs the correction coating while the work W is prevented from rotating due to the engagement of the engaging portion 3f.

[0015]

As is apparent from the above description, according to the inventions of claims 1 and 2, even if the side end of the work approaches the coating gun side during the rotation of the work, the side end is Since the paint enters the gap between the coating patterns of the coating gun, the side end does not have too much paint, and the work can be continuously conveyed and the work can be well coated.

Further, according to the invention of claim 3, the swinging of the work is prevented to prevent uneven coating, and according to the invention of claim 4, the swinging of the work is performed on the reciprocator side. The work can be rotated while being prevented, and it becomes easy to synchronize the painting work by the reciprocator and the work rotation.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of the device of the present invention.

[Fig. 2] Enlarged view of the trolley part of the work transfer hanger conveyor

FIG. 3 is a plan view of a clamp member attached to a reciprocator.

FIG. 4 is a plan view showing a coating pattern of a coating gun.

[Explanation of symbols]

 1 Hanger conveyor (conveying means) 3h Rotating body 5 Reciprocator 6 Arm 7 Coating gun 9 Clamp arm (clamp member) 10 Roller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shogo Ozawa 1-10-1 Shin-Sayama, Sayama-shi, Saitama Honda Engineering Co., Ltd. (72) Inventor Michio Kamiya 2178-380 Nagamine-cho, Kumamoto-shi, Kumamoto (72) Inventor Eiichiro Koda 644-3 Tsukure, Kikuyo-cho, Kikuchi-gun, Kumamoto Prefecture Inventor Hiroshi Mitsuyoshi 3190-327 Tsukuretsu, Kikuyo-cho, Kikuchi-gun, Kumamoto Prefecture (56) Reference JP-A-4-63161 (JP, A)

Claims (4)

(57) [Claims] 1. A method for applying coating on both sides of a work by means of a coating gun arranged on one side of a work conveying path, wherein the work is continuously conveyed while rotating, and a plurality of coating guns are provided, and each of these coating guns is provided. The coating pattern of the coating gun of the coating gun
The coating guns are spaced apart from each other on the arrangement side so that a coating pattern having substantially the same width as the work dimension in the direction orthogonal to the axis as a whole is continuously obtained on the surface, and these coating guns A coating method, wherein coating is performed while reciprocating in the axial direction while maintaining a relative speed difference with a transport speed at zero. 2. An apparatus for applying a coating to both sides of a work by means of a coating gun arranged on one side of the work conveying path, wherein the conveying means hangs the work rotatably and continuously conveys the work, and rotates the work during conveyance. And a reciprocator provided on one side of the work transfer path having a reciprocating arm in the direction of the rotation axis of the work, and the reciprocator is movable in the work transfer direction at the same speed as the work. ,
A plurality of coating guns are mounted on the arm, and the coating patterns of the coating guns are separated from each other at a position separated from the plane parallel to the work transfer path including the rotation axis of the workpiece to the side where the coating guns are arranged.
A coating device which is spaced apart from each other and is installed in such a positional relationship that a coating pattern having substantially the same width as the workpiece dimension in the direction orthogonal to the axis is obtained as a whole on the surface. 3. The coating apparatus according to claim 2, wherein the reciprocator is provided with rocking prevention means for preventing the work from rocking. 4. The swing prevention means is composed of a clamp member for clamping a rotating body provided on a rotation axis of a work through a roller, and a drive provided on the roller and the reciprocator for rotating the roller. The coating device according to claim 3, wherein the rotating means is constituted by means.