JPH0461946A - Reciprocating coating apparatus - Google Patents

Abstract

PURPOSE:To permit a spray gun to move reciprocally along a desirable track by a method wherein a coating device is provided with two tracks and a straightly movable mechanism and a rotationally movable mechanism constrained in movement by such tracks and a spray gun is made to operate by the cooperative action of these mechanisms. CONSTITUTION:A driven member 13 is restrained to movement along a straight track 11 with rollers 26 on its base side secured on the track. By the vertical movement of a sliding member 3, therefore, the driven member 13 is slidably moved horizontally along the track 11. Also by the action of link member 5, a supporting shaft 22, i.e., spray gun supporting member 16, is rotationally moved along a curved track 12 and, by the vertical movement of the sliding member 3, the spray angle of a spray gun 10 to the object 21 being sprayed is changed. By this method, the position of the spray gun can be changed as desired according to a space between the spray gun, and the surface of the object and the spray angle can also be changed as desired in the course of the painting.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a reciprocating coating machine, more specifically a reciprocating automatic coating machine mainly used for painting automobile bodies and their parts, etc. Regarding reciprocating coating machines, side reciprocating coating machines, etc.

The present invention can be particularly advantageously applied to a side reciprocating coating machine for painting the side surfaces of automobile bodies.

(Prior art) For automatic painting of automobile bodies, generally a painting gun such as an electrostatic painting gun or a reciprocating paint machine that reciprocates within a certain range is used.For example, for painting the side of the body, a painting gun or a chain is used. A side reciprocating coating machine that is driven to reciprocate up and down is usually used.

Since the side surfaces of automobile bodies are generally convex curved surfaces, in order to maintain the same stable coating conditions when automatically painting the side surfaces, the painting gun is moved along a curved trajectory corresponding to the convex curved surface, and the gun and It is necessary to maintain constant spacing between vehicle bodies.

As a conventional paint sprayer developed to meet this demand, a single arched rail is installed perpendicularly to the main body of the sprayer, and the vertical movement of the electrostatic spray gun is controlled by following the arched curve of the rail. There was a side reciprocating paint machine that was equipped with a mechanism to restrain it so that it followed the trajectory.

In order to ensure uniformity of the coating area, this type of site reciprocating coating machine uses an arc-shaped rail to move the electrostatic coating gun in a circular arc toward the center point inside the car body. It was a common structure that kept the structure as perpendicular as possible to the
No. 4938, JP-A-56-139163, JP-A-58
No.-81457, JP-A No. 59-98760, JP-A No. 5
(Refer to each publication of No. 8-43968).

(Problem to be solved by the invention) However, although side reciprocating sprayers equipped with a mechanism to keep the direction of the electrostatic spray gun constant as described above have already been developed, A reciprocating paint sprayer equipped with a mechanism that allows changing the reciprocating motion during its reciprocating motion has not yet been developed.

The side of an automobile body is actually a complex convex curved surface that is far from a curved surface with an arcuate cross section, so for the purpose of increasing the uniformity and accuracy of the coating, it is necessary to change the direction of the coating gun during its reciprocating motion. It would be desirable to develop a model of paint sprayer that can be modified. Furthermore, since the shape of the body side changes depending on the fashion of each model year of automobiles, in this type of paint sprayer, the process of changing the direction of the paint gun during reciprocating motion can be easily replaced with another process. Preferably, it is a mechanism.

In addition, in conventional sight reciprocating paint sprayers, the rear part of the paint gun, that is, the support part of the paint gun, or the car body is usually separated from the car body by a distance of about 1m and moves in a circular arc, so the lower part of the side of the body is not completely covered. If automatic painting is not possible and a complete coating is to be achieved, it is necessary to create a pit hole on the floor on the side of the car body being transported to accommodate the paint gun support, or to There was a disadvantage in that it was necessary to transport the paint at a position considerably higher than the surface of the body to enable painting from below the lower end of the side surface of the body. These methods have not been adopted in the past because they require major equipment changes in the paint shop.

The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to cause a painting gun to move reciprocatingly on a preferable trajectory such that the distance between the painting gun and the workpiece to be painted is kept constant; To provide a reciprocating coating machine, especially a site reciprocating coating machine, which can change the direction of a coating gun during its reciprocating movement and can easily change the direction change process.

(Means for Solving the Problems) A reciprocating coating machine according to the present invention includes a main body of the coating machine with a slider slidable in one direction, and a chain drive device moves the slider in the one direction. a reciprocating motion device for reciprocating the paint; a rail for advancing and retracting and for changing direction, each having a predetermined curved track laid on a surface parallel to the sliding surface of the slider on the main body of the paint sprayer; and a paint gun. a coating gun support member that supports a paint gun so as to be disposed toward an object to be painted; a driven member is provided on the slider so as to be slidable in a direction intersecting the first direction; The paint gun supporting member is rotatably supported, and the forward and backward rails are gripped and held at the proximal end side of the driven member to restrain the driven member from moving along its trajectory. an advancing/retracting mechanism that moves the painting gun supporting member forward and backward relative to the object to be painted by reciprocating motion in the direction; a link member for gripping and rotating the coating gun support member according to its trajectory, and reciprocating movement of the slider in the one direction causes the coating can support member to change direction relative to the object to be coated. It is characterized by being equipped with a direction changing mechanism.

The present invention can be particularly advantageously applied to a site reciprocating coating machine. Therefore, the site reciprocating coating machine according to a preferred embodiment of the present invention includes a reciprocating motion device in which a slider is vertically slidably provided on the main body of the sprayer, and the slider is reciprocated up and down by a chain drive device. , rails for advancing and retreating and for changing direction, each of which has a predetermined curved track laid on a vertical surface on the main body of the coating machine; and a coating gun support member that supports the coating gun so that it is deployed toward the object to be coated. and a driven member is horizontally slidably provided on the slider, a distal end side of the driven member rotatably supports the painting gun support member, and a proximal end side of the driven member supports the forward and backward movement. an advancing/retracting mechanism that grips a rail and restrains a driven member to move along its trajectory, and causes the painting gun support member to move forward and backward relative to the object to be coated by the vertical movement of the slider; A link member is provided which connects the attached joint member and the coating gun support member, and which grips the direction changing rail and rotates the coating gun support member according to the trajectory thereof, and the link member is configured to rotate the coating gun support member according to the trajectory thereof, and by the vertical movement of the slider. The present invention is characterized in that it includes a direction changing mechanism that causes the coating gun support member to change direction relative to the article to be coated.

(Summary of the invention) The reciprocating motion device used in the present invention includes a main body of a paint sprayer.
A slider is provided to be slidable in one direction, particularly vertically, and the slider is reciprocated in one direction, particularly up and down, by a chain drive device.

The chain drive device includes a pair of sprockets, a chain, a motor, etc. provided in the coating machine, and the slider includes a dowel connected to the chain so as to be freely displaceable within the width of the sprocket diameter. The above reciprocating exercise device may be equipped with a mechanism similar to a conventional one.

The advancing/retreating and direction changing rails used in the present invention are provided on the main body of the paint sprayer, on a surface parallel to the sliding surface of the slider, and in particular, perpendicularly when the sliding direction of the slider is perpendicular. , laid down,
Each has a predetermined curved trajectory (usually an arched curved trajectory). These two rails are spaced apart and their respective tracks are conventional. The track of the rail is not limited to a circular arc shape, but is appropriately set depending on the shape of the side surface of the automobile body to be painted.

The paint gun support member used in the present invention may be any member that supports one or more paint guns so as to be positioned toward the object to be painted (particularly the side surface of the automobile body), for example,
For fixing each painting gun, a member may be formed by connecting two or more fixing means to one support shaft.

The advancing/retracting mechanism used in the present invention is a mechanism for moving the coating gun support member forward/backward relative to the object to be coated by reciprocating the slider in one direction, particularly by reciprocating the slider up and down. That is,
A driven member is provided as a slider so as to be slidable in a direction intersecting the first direction, especially in the horizontal direction, and the tip side of the driven member (
The coating gun supporting member is rotatably supported around its base axis (on the side closer to the article to be painted), and the proximal end side of the driven member (on the opposite side from the article to be coated) grips a rail for advancing and retracting. and a mechanism for restraining the driven member to a movement following its trajectory, and as the slider reciprocates, the driven member mainly slides horizontally while following the curved trajectory of the advancing/retracting rail, and is therefore supported by the supporting member. The paint gun moves forward or backward so as to maintain a predetermined distance from the vehicle body, which is the object to be painted. Preferably, the sliding process of the driven member is such that the distance between the tip of the paint gun and the side surface of the automobile body is kept constant during the reciprocating movement of the slider by adjusting the shape, particularly the curvature, of the advancing/retracting rail. conditions are set.

The direction changing mechanism used in the present invention uses reciprocating motion of the slider in the one direction, particularly by vertical reciprocating motion.

This is a mechanism that causes the coating gun support member to change direction relative to the object to be coated. That is, it is provided with a link member that connects the joint member attached to the driven member and the coating gun support member, and that can grip the direction changing rail and rotate the coating gun support member according to the trajectory of the rail. Due to the sliding movement, the paint gun support member rotates according to the curved trajectory of the direction changing rail, or remains non-rotatable depending on the conditions, so that the paint gun supported by the support member rotates along the curved trajectory of the direction change rail, so that the paint gun supported by the support member rotates according to the curved trajectory of the direction changing rail. It changes or maintains the orientation angle with respect to the body. Preferably, the deflection process of the coating gun support member is such that the coating gun is maintained in the orientation relative to the side surface of the vehicle body or normally in a vertical position during the reciprocating movement of the slider by adjusting the shape, particularly the curvature, of the deflection rail. Conditions are set such that the direction is changed within a range of, for example, ±40° at a specific body part. Particularly in the process of painting the lower side of the body, it is preferable to adjust the direction of the paint gun so that it is held horizontally with respect to the floor of the paint booth.

(Function) In the present invention, when the slider slides back and forth in one direction, especially in the vertical direction, due to the operation of the reciprocating motion device, the driven member is moved by the movement of both the advancing/retracting mechanism and the direction changing mechanism. It slides in one direction, especially in the horizontal direction, according to the track of the advance/retreat rail, and at the same time, due to the function of the link member, the paint gun support member on the tip side of the driven member rotates according to the track of the direction change rail, or depending on the conditions. The painting gun fixed to the support member maintains a non-rotating state, and thereby, during the reciprocating movement of the slider, the paint gun moves to form a predetermined change in the distance between the slider and the object to be painted (automobile body). At the same time, the direction angle with respect to the surface of the workpiece to be coated is changed in a predetermined transition process.Thus, by appropriately adjusting the curved track of the two rails, the reciprocating motion of the slider can be changed. At the same time, the position of the coating gun can be changed in accordance with a desired process in distance from the surface of the article to be coated, and at the same time, the orientation of the coating gun can be changed in accordance with the desired process in relation to the surface of the article to be coated.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Although the embodiment relates to a side reciprocating paint machine for painting the side surfaces of automobile bodies, the invention is not limited thereto.

As shown in FIGS. 1 to 3, the coating machine 1 of the embodiment is provided with a slider 3 and its registration flow drive device 7 in its main body 2 in the same manner as in the prior art. That is, the slider 3 is vertically slidably provided on the left and right edges of the sliding structure 6, and a pair of sprockets 4a and 4b are arranged above and below, with the lower sprocket 4b being a gear. The connecting device 9 is connected to the motor 8, and the chain 5 wound between the sprockets is linked to the slider 3. When the motor 8 is operated, the sprockets 4a, 4b and the chain 5 are rotated, and the slider 3 is rotated. It is equipped with a mechanism for reciprocating movement up and down. As shown in FIG. 8, the linkage structure between the slider 3 and the chain 5 is such that a dog 17 connected to the chain 5 is fitted into the hollow 19 of the slider 3 so as to be slidable on the moving surface 20. Then, due to the driving force transmitted from the chain 5 to the thorns 17, the slider 3 moves upward or downward, and when it approaches the upper and lower sprockets 4a, 4b, the thorns 17 move by the width q between the chains. The mechanism for reversing the movement of the slider 3 is the same as the conventional one. In addition, in the figure, 18 indicates an auxiliary wheel for smoothing the sliding movement of the slider 3.

In addition, this coating machine 1 has a 211 (fourth
The electrostatic coating gun 10.10 shown in FIG. As shown in FIG. 4, this gun support member 16 has two shafts for mounting the painting gun.
3.23 is vertically fixed to one support shaft 22.

Further, the coating machine main body 2 is formed by laying forward/backward rails 11 and direction change rails 12 on a vertical plane. rail 11
The upper half has an arcuate trajectory centered on point p, and the lower half has an arcuate trajectory centered on point p3. The upper half of the rail 12 has an arcuate trajectory centered on point P2, and the lower half has an arcuate trajectory centered on point p4.

As shown in FIG. 4, the slider 3 is provided with a driven member 13 that is horizontally slidable (in the figure, 24 indicates the sliding member), as shown in more detail in FIGS. 5 to 7. Indicates the moving surface.

), and the tip side of the driven member 13 (to-be-painted product side),
The supporting shaft 22 is fitted to rotatably support the painting gun supporting member 16 together with the fixing member 25, and at the base end side of the driven member 13, the advancing/retracting rail 11 is gripped by the rollers 26... 13 is restrained from moving along the rail track. Therefore, as the slider 3 moves up and down, the driven member 13 slides horizontally along the trajectory of the rail 11, thereby moving the supporting member 16, that is, the painting gun 10, forward and backward relative to the article 21 to be painted. There is. In addition, in the figure, 27 indicates an auxiliary wheel for smoothing the sliding movement of the driven member 13.

Furthermore, in the embodiment, a direction change mechanism is provided in addition to the advance/retreat mechanism. That is, the joint member 14 is connected to the driven member 13.
The direction changing rail 12 is held by the rollers 29 of the roller unit 28, and the unit 28 and the joint member 14 are rotatably connected by a short rod 30, and a long rod is attached to the unit 28. The rod 31 is rotatably connected, and the connecting member 32 fixed to the support shaft 22 is rotatably connected to the other end of the rod 31. Due to the function of the link member 15, the support "base shaft 22. That is, the coating gun support member 16 is connected to the rail 1
Accordingly, by the vertical movement of the slider 3, the orientation angle of the coating gun 10 with respect to the workpiece 21 changes at the same time as it moves forward and backward.

In the site reciprocating coating machine of the embodiment, the rail 11 is
．． By following the trajectory conditions of No. 12, as shown in FIG.
The object to be painted is moved in an arc so that it is perpendicular to the surface of the automobile body (height h) 21 and the distance therebetween is kept constant, and the position C is lower than the position C. Now, instead of keeping the distance from the side surface of the body constant, the painting gun 10 has been moved in a horizontal position with respect to the floor. Therefore, I decided to completely paint the lower part of the side of the body. In addition, in the figure, text and text indicate the trajectory of the tip of the coating gun 10 and the support axis 2.
The trajectory of 2 is shown.

(Effects of the Invention) As described above, the reciprocating coating machine according to the present invention includes two rails, an advancing/retracting mechanism and a direction changing mechanism that are restrained by these rails, and a mechanism that moves the coating gun by the movement of both of these rails. By adjusting the curved track of the rail, during the reciprocating movement of the slider, the position of the painting gun can be changed according to the desired distance from the surface of the workpiece, and at the same time the direction of the painting gun can be adjusted. can be varied according to the angle relative to the surface of the workpiece or the desired process.

For example, in a site reciprocating coating machine, the electrostatic coating gun is held perpendicular to the surface of the car body as the object to be painted, and is moved in an arc so that the distance from the car body is preferably kept constant; In the process of painting the lower part of the side of the body after drying, the paint gun can be kept in a horizontal position with respect to the floor. Therefore, by using such a painting method, it is possible to completely paint even the lower side of the car body without having to change the painting equipment.

Furthermore, the reciprocating coating machine of the present invention has the feature that the direction change process of the coating gun can be changed by adjusting the curved trajectory of the rail, and the direction change process can be easily changed.

[Brief explanation of drawings]

FIG. 1 is a front view of a reciprocating coating machine according to an embodiment of the present invention, and FIGS. 2 and 3 are a left side view and a rear view of the reciprocating coating machine of FIG. 1, respectively. Figure 4 shows the inside of the reciprocating coating machine shown in Figure 1 from A-A in the figure.
5, 6, and 7 are plan views showing enlarged slider systems in the coating machine shown in FIG. 4; FIG. Front View and Side View, FIG. S is a front view showing the slider of FIG. 6 with the driven member etc. removed. In the figure, l... Reciprocating coating machine 2... Painting machine body 3... Slider 4a, 4b... Sprocket 5, own chain 7... Reciprocating drive device lO... Electrostatic coating gun 11...Rail for advancing and retreating 12...Rail for changing direction l3 ・ 14 ・ ・ l 5 ・ l 6 ・ 2 l ・ 26, 2 Driven member Joint member Link member Painting gun support member Part to be painted... Gripping roller figure 2

Claims (2)

[Claims] (1) A reciprocating movement device, which includes a slider slidably in one direction on the main body of the atomizer, and which reciprocates the slider in the one direction using a chain drive device; , advancing/retreating and direction changing rails each having a predetermined curved track laid on a surface parallel to the sliding surface of the slider, and supporting a painting gun so as to be deployed toward the object to be painted. a coating gun support member; a driven member is provided on the slider so as to be slidable in a direction intersecting the first direction, and the coating gun support member is rotatably supported on a distal end side of the driven member; , the base end side of the driven member grips the advancing/retracting rail to restrain the driven member from moving along its trajectory, and the reciprocating movement of the slider in the one direction moves the coating gun supporting member to the object to be painted. a forward/backward moving mechanism for moving forward and backward relative to the moving member; a joint member attached to the driven member and the painting gun support member; A reciprocating coating comprising a link member that is movable, and a direction changing mechanism that causes the coating gun support member to change direction relative to the object to be coated by reciprocating movement of the slider in the one direction. Machine. (2) A reciprocating movement device that includes a slider vertically slidable on the main body of the atomizer, and that reciprocates the slider up and down by a chain drive device; Advance/retreat rails and direction change rails each having a predetermined curved track are laid; a coating gun support member that supports the coating gun so as to be deployed toward the object to be coated; and a driven member is attached to the slider. The driven member is provided to be slidable horizontally, and the distal end side of the driven member rotatably supports the painting gun support member, and the proximal end side of the driven member grips the advance/retreat rail to move the driven member along its trajectory. an advancing/retracting mechanism for moving the coating gun support member forward and backward relative to the object to be coated by vertical movement of the slider; and a joint member attached to the driven member and the coating gun support member. A link member is provided which connects the direction change rail and rotates the coating gun support member according to the trajectory thereof, and the vertical movement of the slider causes the coating gun support member to move relative to the object to be coated. 2. The reciprocating coating machine according to claim 1, further comprising a direction changing mechanism for causing direction changing movement.