JPH062770Y2 - Automatic painting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an automatic coating device suitable for coating from the upper side surface to the upper surface of an automobile body which is conveyed at a constant speed by a conveyor.

[Conventional technology]

When the finish coating of an automobile body that requires extremely strict coating quality is performed, as a device for automatically coating the side surface of the automobile body W conveyed by a conveyor as schematically shown in FIG. The automatic coating machine 30 is reciprocally moved up and down with a predetermined stroke that is variable according to the coating width of the vehicle body W at the same time.
Tilt to face the painted surface according to the change in shape
A side reciprocating device SR for tilting is used, and the entire device SR is moved forward and backward on a rail 31 laid perpendicular to the transport direction of the vehicle body W to separate the automatic coating machine 30 from the vehicle body W. I try to keep a constant paint distance between them.

The two side reciprocating devices SR are arranged side by side on both sides of the conveyance path of the automobile body W, one of which moves the automatic coating machine 30 up and down from the lower side face to the upper side face of the automobile body W. The other one is designed to move the automatic coating machine 30 up and down from the upper side surface to the upper surface of the automobile body W.

[Problems to be solved by the invention]

However, in order to maintain a constant coating distance between the automatic coating machine 30 and the vehicle body W, if the entire side reciprocating device SR, which weighs 2 to 3 tons, is to be moved, the drive mechanism will only increase in size. However, there is a problem in that it cannot be moved in small steps according to a subtle change in the shape of the automobile body W.

Further, since the distance between the side reciprocating device SR and the car body W is close, the paint sprayed from the automatic coating machine 30 adheres to the main body of the side reciprocating device SR and stains the surface thereof, or adheres to the rail 31 to cause side damage. There is also a problem that the reciprocating device SR may be hindered from running.

In order to eliminate this problem, the rail 31 is laid away from the vehicle body W, and is connected to a drive chain 34 hung in parallel between the pair of upper and lower sprockets 32, 33 to move vertically. It is conceivable that a long strut (not shown) extending horizontally toward the automobile body W is provided on the child 35, and the automatic coating machine 30 is attached to the tip of the strut. However, in this case, the load of the automatic coating machine 30 equipped with a color change valve device, a shroud for color change cleaning, etc. (usually about 50 kg) and the load of the stanchion that must be made sturdy to support this Yubiko 3
There is a risk that the automatic coating machine 30 may be hindered from being smoothly moved up and down, or the drive chain 34 may be accidentally disconnected. Further, if the column is made thin to reduce its weight, a new problem arises in that the automatic coating machine 30 attached to the tip of the column is shaken when it is moved up and down so that it cannot face the coated surface.

Therefore, an object of the present invention is to provide an unprecedented new type automatic coating apparatus capable of solving these problems at once.

[Means for solving problems]

In order to achieve this object, the automatic coating device according to the present invention has a rotary shaft of a motor mounted on an elevation table which moves up and down according to the height of the coated object conveyed at a constant speed. A first arm that rotates up and down toward is connected to the motor, and a motor for rotating the rotation shaft arranged in parallel with the conveyance direction of the object to be rotated is provided at the tip of the arm. A coating machine facing the object is attached to the tip of a second arm that is fixed orthogonally to the axis, and the rotation axis to which the arm is fixed is a fulcrum on the rear end side of the second arm. A color changing valve device serving as a counterweight that balances the load applied to the tip end side is attached, and the torque applied by the load of the second arm is offset to the rotation shaft of the motor to which the first arm is connected. The counter weight Burubea wherein the is suspended.

[Action]

For example, when painting from the upper side surface to the upper surface of an automobile body using the automatic painting apparatus according to the present invention, the elevator is moved up and down according to the height of the automobile body, and the motor mounted on the elevator is also used. While rotating the first arm connected to the rotary shaft up and down toward the automobile body, the rotary shaft of the motor provided at the tip of the arm is switched between forward and reverse rotation to rotate the rotary shaft. By rotating the second arm fixed to the up and down,
The coating machine attached to the second arm can be moved up and down along the coating surface of the automobile body while maintaining a constant coating distance, and at the same time, the coating machine is always directly facing the coating surface. be able to.

At this time, the second arm having the coating machine attached to the tip is fixed perpendicularly to the rotation axis of the motor provided at the tip of the first arm, and the rotation axis is used as a fulcrum on the rear end side of the coating machine. Since a counter weight that balances the load applied to the tip end of the motor is mounted, even if the motor is comparatively small, the heavy weight coating machine mounted on the sturdy second arm can be smoothly moved up and down. Can be moved.

Further, even if the tip side of the second arm is lengthened and the whole arm becomes heavy, if a counterweight corresponding to the load applied to the tip side is attached to the rear end side, a motor for rotating the arm up and down is provided. It is possible to prevent an increase in the load on the motor to be small and prevent the motor from increasing in size.

In particular, in the present invention, since the color changing valve device equipped in the coating machine serves as a counterweight attached to the rear end side of the second arm, it is not necessary to attach an extra weight to the second arm, and the motor can be used. The load of can be reduced to the maximum.

Therefore, the tip side of the second arm to which the painting machine is attached is extended to the direction of the car body, the main body of the automatic painting device is installed away from the car body, and the surface of the device body is sprayed from the painting machine. Even if it is not stained with paint, no trouble will occur.

In addition, the rotary shaft of the motor to which the first arm is connected,
Since a cable bear that serves as a counterweight that cancels the torque applied by the load of the second arm is hung, even if the tip side of the second arm to which the coating machine is attached is extended long in the direction of the automobile body, Slip rotation of the shaft is reliably prevented.

Also, according to the present invention, the coating distance can be precisely finely adjusted by simply moving the first arm and the second arm that are smoothly driven by the motor at the same time. Since it is not necessary to move the entire device as described above, a drive mechanism, a rail, etc. for running the device are not required, and the facility cost is significantly reduced.

〔Example〕

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a front view of an automatic coating apparatus according to the present invention, and FIG. 2 is a side view thereof.

The automatic coating apparatus shown in this example has a rotary shaft 3 of a servo motor 2 mounted on a lift table 1 that moves up and down according to the height of an automobile body W conveyed at a constant speed by a conveyor or the like.
A first arm 4 that can be turned up and down toward the side surface of the vehicle body W is connected, and a rotation shaft 5 that is arranged in parallel with the transport direction of the vehicle body W is forwardly / reversely switched and rotated at the tip of the arm 4. A servo motor 6 is provided.

A second arm 7 is fixed to the rotary shaft 5 of the servo motor 6 so as to be orthogonal thereto, and an electrostatic coating machine 8 facing the side surface of the automobile body W is attached to the end of the second arm 7. A counter weight 9 is mounted on the rear end side of the servo motor 6 to balance the load applied to the front end side with the rotary shaft 5 of the servo motor 6 as a fulcrum.

The counterweight 9 is composed of a color changing valve device CCV which is connected to the electrostatic coating machine 8 and is provided.

The lift 1 is provided with a screw shaft 11 and a support 12 above a base 10 installed away from the vehicle body W.
Servo motor 13 supported in the base 10 and provided in the base 10.
The screw shaft 11 driven by the screw feed mechanism 14
Can be moved up and down to move up and down. The screw feed mechanism 14 is provided with a pulse generator 15 that detects the current position of the lift base 1 and the lifting direction and outputs a rotation control signal for the servo motor 13.

Further, the lift base 1 is provided with a pulse generator 16 that detects a rotation direction and a rotation angle of the rotary shaft 3 of the servo motor 2 and outputs a rotation control signal of the servo motor 2.

The rotary shaft 3 of the servomotor 2 is provided with a pulley 18 for suspending a chain type counterweight 17 that cancels the torque applied by the load of the electrostatic coating machine 8 and the second arm 7 to which the counterweight 9 is attached. ing.

The counter weight 17 includes a power cable, a paint hose,
It consists of a cable bear for accommodating hoses such as an air hose collectively, and both ends thereof are supported by a pulley 18 and a base 10, respectively, so that the whole is suspended.

The servomotor 6 includes a pulse generator that controls the rotation direction and rotation angle of the rotary shaft 5, a brake device that brakes the rotary shaft 5 against the torque applied by the load of the second arm 7, and the like. .

A shroud 19 for color change cleaning is attached to the electrostatic coating machine 8 attached to the second arm 7.

Then, when painting from the upper side surface to the upper surface of the automobile body W, the servo motor 13 is activated to start the lift table 1.
While raising and lowering, the first arm 4 is rotated up and down by the servo motor 2 to move the electrostatic coating machine 8 up and down along the side surface of the automobile body W, and at the same time, the electrostatic coating machine according to the inclination of the side surface. 8 is moved back and forth with respect to the car body W.

Further, in parallel with this, the second arm 7 is rotated up and down by the servo motor 6 so that the electrostatic coating machine 8 attached to the tip of the arm 7 is directly opposed to the coating surface of the automobile body W.

By doing so, a constant coating distance is always maintained between the electrostatic coating machine 8 and the vehicle body W, and at the same time, the electrostatic coating machine 8 is always directly opposed to the coating surface of the vehicle body W. , Good coating quality can be obtained.

In particular, the triaxial control by the lift 1, the first arm 4 and the second arm 7 can follow a slight change in the shape of the automobile body W, so that the coating quality of the finish coating is significantly improved.

Further, according to the present invention, since it is not necessary to move the entire automatic coating apparatus, a drive mechanism, rails, etc. for that purpose are not required, and the equipment cost is greatly reduced.

Further, since the second arm 7 fixed to the rotary shaft 5 of the servomotor 6 is provided with a counterweight 9 on the rear end side thereof, which balances the load on the tip end side, even if the arm 7 is lengthened, Electrostatic coating machine 8 attached to the tip
Can be smoothly moved up and down by the lightweight and small servo motor 6. In particular, if the heavy weight color changing valve device CCV provided in the electrostatic coating machine 8 is also used as the counter weight 9, it is not necessary to attach an extra weight to the second arm 7, so that the load of the servo motor 6 is reduced. Can be reduced most.

Therefore, the tip end side of the second arm 7 is placed on the automobile body W.
No problem will occur even if the automatic painting apparatus main body is installed in a position away from the automobile body W by extending it in the direction of and the surface of the apparatus main body is not contaminated by the paint sprayed from the electrostatic coating machine 8. .

Further, if a counterweight 17 composed of a cable bear containing heavy hoses is hung on the rotary shaft 3 of the servomotor 2 on which the loads of the first arm 4 and the second arm 7 are all applied, the rotation of It is possible to prevent slip rotation of the shaft 3.

In particular, the counterweight 17 is hung from the rotary shaft 3 of the servomotor 2 as the lifting platform 1 rises and the arms 4 and 7 must be extended toward the vehicle body W. Since the load increases, slip rotation of the rotary shaft 3 is reliably prevented.

[Effects of the Invention] As described above, according to the present invention, when the side surface of the object to be coated is coated, the coating surface is always constant between the coating machine and the coating surface by following the subtle shape change. The distance can be maintained, and at the same time, the coating machine can be directly faced to the coating surface, so that the coating quality is significantly improved.

Also, on the rear end side of the second arm that can be rotated up and down by a motor with a coating machine attached to the tip, as a counterweight that balances the load of the coating machine, without adding extra weight, equip it to the coating machine. Since the color changing valve device is used, the arm can be smoothly moved up and down by a lightweight and small motor, and if the motor is lightened, the first arm provided with the motor at the tip thereof can be used. The motor for moving up and down can also be made lighter and smaller, and furthermore, a cable bear for storing heavy hoses is hung on the rotary shaft of the motor for moving the first arm up and down, and the cable bear is Since it is a counter weight that cancels the torque applied by the load of the arm, slip rotation of the rotary shaft is reliably prevented. Therefore, the second arm is extended in the direction of the object to be coated, the main body of the automatic coating device is installed at a place where the object to be coated is far away, and the paint sprayed from the coating machine attached to the tip of the second arm is bathed. There is an excellent effect that it is possible to reliably prevent the surface of the device body from being soiled.

[Brief description of drawings]

FIG. 1 is a front view of an automatic coating apparatus according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a front view of a conventional apparatus. DESCRIPTION OF SYMBOLS W ... Automotive body (object to be coated), 1 ... Lifting platform, 2 ... Motor, 3 ... Rotation axis, 4 ... First arm, 5 ... Rotation axis, 6 ...
Motor, 7 ... Second arm, 8 ... Electrostatic coating machine, 9 ... Counter weight.

Claims (1)

[Scope of utility model registration request] 1. A rotary shaft (3) of a motor (2) mounted on a lift table (1) which moves up and down according to the height of a coated object (W) conveyed at a constant speed. A first arm (4) that rotates up and down toward the object (W) is connected, and a rotating shaft (5) arranged in parallel with the transport direction of the object (W) to be coated is attached to the tip of the arm (4). ) Is provided for rotating the motor (6) in a forward / reverse direction, and the object to be coated (W) is attached to the tip of the second arm (7) fixed perpendicularly to the rotation axis (5) of the motor (6). A load is applied to the front end side of the second arm (7), which is attached to the facing coating machine (8) and has the rotary shaft (5) to which the arm (7) is fixed as a fulcrum. Color change valve device that becomes a counter weight (9) that balances with
(CCV) is attached to the rotary shaft (3) of the motor (2) to which the first arm (4) is connected, and a counterweight for canceling the torque applied by the load of the second arm (7). (17) A cable bear is suspended, and an automatic coating device is characterized.